CN113839204A - Mobile terminal and high isolation antenna pair - Google Patents

Mobile terminal and high isolation antenna pair Download PDF

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Publication number
CN113839204A
CN113839204A CN202111101171.XA CN202111101171A CN113839204A CN 113839204 A CN113839204 A CN 113839204A CN 202111101171 A CN202111101171 A CN 202111101171A CN 113839204 A CN113839204 A CN 113839204A
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CN
China
Prior art keywords
radiator
induced current
conductor
mode
mobile terminal
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Granted
Application number
CN202111101171.XA
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Chinese (zh)
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CN113839204B (en
Inventor
周大为
李元鹏
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Honor Device Co Ltd
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Honor Device Co Ltd
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Priority to CN202111101171.XA priority Critical patent/CN113839204B/en
Publication of CN113839204A publication Critical patent/CN113839204A/en
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Publication of CN113839204B publication Critical patent/CN113839204B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/04—Multimode antennas

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)

Abstract

The application discloses mobile terminal and high isolation antenna are right. The application provides a mobile terminal includes casing, irradiator, excitation body and feed. Wherein, the casing adopts conducting material, and the lateral part of casing is equipped with the breach. The radiator is at least partially located in the gap. The exciting body is positioned on the inner side of the radiating body, a gap exists between the exciting body and the radiating body, and the exciting body comprises a feed point and is connected with the shell. The positive pole of the feed source is connected with the feed point of the exciting body, and the negative pole of the feed source is connected with the shell; the feed source can feed the electric signals into the exciting body and the shell from the feed point, and an alternating magnetic field or an alternating electric field is generated around the exciting body and the shell, so that the strength of the alternating electric field or the alternating magnetic field is increased, and the radiation performance of the mobile terminal is improved. In addition, the antenna structure of the CM line antenna mode and the antenna structure of the DM line antenna mode are designed in a combined mode, and therefore high-isolation antenna pairs are obtained.

Description

Mobile terminal and high isolation antenna pair
Technical Field
The application relates to the field of mobile communication, in particular to a mobile terminal and a high isolation antenna pair.
Background
The conventional antenna device excites a CM (common mode) antenna mode and a DM (differential mode) antenna mode by feeding a radiator (e.g., a line antenna, a slot antenna) having a specific shape. For example, a CM antenna pattern may be excited on a wire antenna radiator by feeding the wire antenna radiator directly. In the prior art, two feed sources are generally used for providing radio frequency signals with equal amplitude and in phase respectively, and the radio frequency signals with equal amplitude and in phase are fed into a linear antenna radiator to realize direct feed. However, in the process of engineering implementation, due to the difference of structure and material, it is difficult to obtain two identical feeds to provide radio frequency signals with equal amplitude and in phase, resulting in a reduction in radiation efficiency and bandwidth potential of the antenna device.
Disclosure of Invention
The application provides a mobile terminal and a high isolation antenna pair. The mobile terminal provided by the application comprises an excitation source and a radiator, wherein the excitation source feeds a radiator (such as a line antenna and a slot antenna) with a specific shape in a coupling feeding mode and excites a plurality of antenna modes. The mobile terminal feeds power to the excitation source in a single-point feeding mode, and performs coupling feeding on the radiating body through the excitation source, so that the feeding difficulty is reduced, and the radiation efficiency and the bandwidth potential of the mobile terminal are improved.
In one aspect, the present application provides a mobile terminal. The mobile terminal comprises a shell, a radiator, a stimulation body and a feed source. The shell is made of conductive materials, a notch is formed in the side portion of the shell, and an opening of the notch is located on the outer surface of the shell. The radiator is at least partially located in the notch and fixedly mounted on the notch. The exciting body is located the inboard of irradiator, and has the clearance with the irradiator between, and exciting body fixed mounting is in the breach, and exciting body includes the feed point, and exciting body connects the casing. The positive pole of the feed source is connected with the feed point of the exciting body, and the negative pole of the feed source is connected with the shell; the feed source can feed an electric signal into the exciting body and the shell from a feed point, an alternating magnetic field or an alternating electric field is generated around the exciting body and the shell, and the radiating body can resonate and amplify the alternating magnetic field or the alternating electric field and generate an induced current.
In this implementation, the feed source can feed electrical signals from the feed point into the housing and the excitation body, increasing the strength of the alternating electric field or the alternating magnetic field. The intensity increase of the alternating electric field or the alternating magnetic field can improve the intensity of the excited induced current, so that the intensity of the radio frequency signal radiated by the mobile terminal is increased, and the radiation performance of the mobile terminal is improved.
In a possible implementation manner, the exciter feeds an electrical signal into the radiator from the middle of the radiator in a coupling feeding manner, the radiator forms a line antenna, and gaps are formed between two ends of the line antenna and the shell.
In this implementation, the portion between the two ends of the radiator can be regarded as the middle of the radiator. The feed point of the exciter corresponds to the middle of the radiator. Illustratively, the middle part of the radiator is equidistant from the two ends of the radiator to generate a radiation pattern distributed symmetrically and improve the radiation efficiency of the radiator, and the frequencies of the first induced current and the second induced current are the same.
In one possible implementation manner, the line antenna includes a first portion and a second portion, the first portion is a portion from the middle of the radiator to one end of the radiator, the second portion is a portion from the middle of the radiator to the other end of the radiator, the exciting body includes a planar conductor or a linear conductor, the planar conductor or the linear conductor excites a first induced current in the first portion by means of coupling feeding and excites a second induced current in the second portion, and directions of the first induced current and the second induced current are opposite.
In this embodiment, the first and second parts together form a radiation branch, and the planar or linear conductor excites a coupled-feed CM-line antenna pattern on the line antenna.
In a possible implementation manner, the line antenna includes a first portion and a second portion, the first portion is a portion from the middle of the radiator to one end of the radiator, the second portion is a portion from the middle of the radiator to the other end of the radiator, the first portion and the second portion jointly form a radiation branch, the exciter further includes a ring conductor, two ends of the ring conductor are connected with the housing, a gap exists between the middle of the ring conductor and the housing, the ring conductor excites a fifth induced current in the first portion and a sixth induced current in the second portion in a coupling feeding manner, and directions of the fifth induced current and the sixth induced current are the same; or
The exciter excites a fifth induced current in the first part and a sixth induced current in the second part by means of direct feeding, and the directions of the fifth induced current and the sixth induced current are the same.
In this implementation, the planar conductor or the linear conductor excites a CM-line antenna pattern of coupling feeding on the line antenna, while the loop conductor excites a DM-line antenna pattern of coupling feeding on the line antenna, forming a highly isolated antenna pair.
In one possible implementation manner, the exciting body comprises a ring-shaped conductor, two ends of the ring-shaped conductor are connected with the shell, a gap exists between the middle part of the ring-shaped conductor and the shell, the ring-shaped conductor excites a first induced current in the first part and a second induced current in the second part by means of coupling feeding, and the directions of the first induced current and the second induced current are the same.
In this implementation, the loop conductor excites a coupled-feed DM-wire antenna pattern on the wire antenna.
In a possible implementation manner, the exciter feeds an electrical signal into the radiator by coupling feeding from the middle of the radiator, the radiator forms a slot antenna, the slot antenna is formed by slotting on the shell, two ends of the radiator are connected with the shell, the slot antenna comprises a third part and a fourth part, the third part is a part from the middle of the radiator to one end of the radiator, and the fourth part is a part from the middle of the radiator to the other end of the radiator.
In this implementation manner, the distances from the middle of the radiator to the two ends of the radiator are equal to generate a radiation pattern distributed symmetrically, the radiation efficiency of the radiator is improved, and the frequencies of the third induced current and the fourth induced current are the same.
In one possible implementation, the excitation body includes a planar conductor or a linear conductor, the planar conductor or the linear conductor excites a third induced current in the third portion and a fourth induced current in the fourth portion by means of coupled feeding, and directions of the third induced current and the fourth induced current are opposite.
In this implementation, a planar or linear conductor excites a DM slot antenna pattern of coupled feed on the slot antenna.
In a possible implementation manner, the excitation body further includes a ring-shaped conductor, two ends of the ring-shaped conductor are connected with the housing, a gap exists between a middle portion of the ring-shaped conductor and the housing, the ring-shaped conductor excites a fifth induced current in the third portion and excites a sixth induced current in the fourth portion in a coupling feeding manner, and directions of the fifth induced current and the sixth induced current are the same; or
The exciter excites a fifth induced current in the third part and a sixth induced current in the fourth part by means of direct feeding, and the directions of the fifth induced current and the sixth induced current are the same.
In this implementation, the planar conductor or the linear conductor excites a DM slot antenna pattern of coupling feeding on the slot antenna, and the loop conductor excites a CM slot antenna pattern of coupling feeding on the slot antenna, forming a high isolation antenna pair.
In a possible implementation manner, the exciting body is a ring-shaped conductor, two ends of the ring-shaped conductor are connected with the shell, a gap exists between the middle part of the ring-shaped conductor and the shell, the ring-shaped conductor excites a third induced current in the third part and a fourth induced current in the fourth part in a coupling feeding manner, and the directions of the third induced current and the fourth induced current are the same.
In this implementation, the loop conductor excites a coupled-feed CM slot antenna pattern on the slot antenna.
In one possible implementation, the radiator further forms a line antenna, a gap is formed between each of two ends of the line antenna and the housing, the line antenna includes a first portion and a second portion, the first portion is a portion from the middle of the radiator to one end of the radiator, and the second portion is a portion from the middle of the radiator to the other end of the radiator;
the planar conductor or the linear conductor excites a first induced current in the first part and a second induced current in the second part in a coupling feeding mode, and the directions of the first induced current and the second induced current are opposite; or
The exciter excites a fifth induced current in the first part and a sixth induced current in the second part by means of direct feeding, and the directions of the fifth induced current and the sixth induced current are opposite.
In this implementation, the planar conductor or the linear conductor excites a DM slot antenna pattern of coupled feed on the slot antenna, while the planar conductor or the linear conductor excites a CM line antenna pattern of coupled feed on the slot antenna, forming a high isolation antenna pair.
In one possible implementation, the radiator further forms a line antenna, a gap is formed between each of two ends of the line antenna and the housing, the line antenna includes a first portion and a second portion, the first portion is a portion from the middle of the radiator to one end of the radiator, and the second portion is a portion from the middle of the radiator to the other end of the radiator;
the annular conductor excites a first induced current in the first part and excites a second induced current in the second part in a coupling feeding mode, and the directions of the first induced current and the second induced current are the same; or
The exciter excites a fifth induced current in the first part and a sixth induced current in the second part by means of direct feeding, and the directions of the fifth induced current and the sixth induced current are the same.
In this implementation, the loop conductor excites a CM slot antenna mode of the coupled feed on the slot antenna, while the loop conductor excites a DM line antenna mode of the coupled feed on the line antenna, forming a high isolation antenna pair.
In one possible implementation, the distance between the feed point and the two ends of the annular conductor is equal, the exciting body further comprises a capacitor, and the capacitor is located between the annular conductor and the shell and connected with the annular conductor and the shell;
the capacitor is connected with the first section of the annular conductor or the third section of the annular conductor; or
The number of the capacitors is two, and the two capacitors are respectively connected with the first section of the annular conductor and the third section of the annular conductor.
In this implementation manner, the capacitance is added between the annular conductor and the housing, and the magnetic field strength of the alternating magnetic field generated by the annular conductor can be increased, so that the intensity of the induced current excited by the exciting body on the radiator is increased, and the radiation efficiency of the radiator is further increased.
In one possible implementation, the feed point is located at the end of the ring conductor.
In a possible implementation manner, the excitation body further comprises a connecting piece, the connecting piece comprises a capacitor or an inductor, and the connecting piece is located between the annular conductor and the shell and connects the annular conductor and the conductive part; the feed point and the connecting piece are respectively positioned at two ends of the annular conductor.
In this implementation manner, capacitance or inductance is added between the annular conductor and the housing, which can increase the magnetic field strength of the alternating magnetic field generated by the annular conductor, thereby increasing the intensity of the induced current excited by the exciting body on the radiator, and further increasing the radiation efficiency of the radiator.
In a possible implementation, the excitation body further comprises a capacitor, and the capacitor is equidistant from two ends of the second segment of the annular conductor.
In this implementation manner, the capacitance is added between the annular conductor and the housing, and the magnetic field strength of the alternating magnetic field generated by the annular conductor can be increased, so that the intensity of the induced current excited by the exciting body on the radiator is increased, and the radiation efficiency of the radiator is further increased.
In a possible implementation manner, the annular conductor further includes a fourth segment and a fifth segment parallel to the second segment of the annular conductor, wherein one end of the fourth segment of the annular conductor is connected to the third segment of the annular conductor, the other end of the fourth segment of the annular conductor is connected to the housing, one end of the fifth segment of the annular conductor is connected to the first segment of the annular conductor, the other end of the fifth segment of the annular conductor is connected to the housing, and the feed point is located at an end portion of the annular conductor.
In this implementation, the length of the annular conductor is increased, thereby increasing the magnetic field strength of the alternating magnetic field generated by the exciting body and further increasing the radiation efficiency of the radiator.
In a possible implementation manner, the exciting body further includes a connecting member, the connecting member is located at the end portion of the annular conductor and the housing and connects the annular conductor and the housing, and the feed point and the connecting member are respectively located at two ends of the annular conductor.
In a possible implementation manner, the exciting body further comprises a capacitor, and the capacitor is located in the middle of the second section of the annular conductor; or
The exciter body further comprises a plurality of capacitors, and the plurality of capacitors are respectively positioned in the middle of the second section of the annular conductor and at two ends of the second section of the annular conductor.
On the other hand, the application also provides a high isolation antenna pair which is applied to the mobile terminal. In this implementation, the CM line antenna mode exhibits vertical polarization and the DM line antenna mode exhibits horizontal polarization. And because the isolation between the vertically polarized antenna mode and the horizontally polarized antenna mode is good, the antenna structure of the CM wire antenna mode and the antenna structure of the DM wire antenna mode are designed in a common body, so that an orthogonal mode can be formed, and an antenna pair with high isolation is obtained.
In one possible implementation manner, the high isolation antenna pair includes a radiator, a CM mode excited body and a DM mode excited body, and the CM mode excited body and the DM mode excited body are arranged at intervals;
the CM mode exciter and the DM mode exciter feed electric signals into the radiator from the middle part of the radiator in a coupling feeding mode, and the radiator forms a line antenna which comprises a first part and a second part, wherein the first part is a part from the middle part of the radiator to one end of the radiator, and the second part is a part from the middle part of the radiator to the other end of the radiator;
the CM mode exciter excites a first induced current in a first part and excites a second induced current in a second part in a direct feeding mode, and the directions of the first induced current and the second induced current are opposite; or
A gap exists between the CM mode exciting body and the radiating body, the CM mode exciting body comprises a planar conductor or a linear conductor, the planar conductor or the linear conductor excites a first induced current in a first part and excites a second induced current in a second part in a coupling feeding mode, and the directions of the first induced current and the second induced current are opposite;
and a gap exists between the DM mode exciting body and the radiator, the DM mode exciting body comprises a ring-shaped conductor, the ring-shaped conductor excites a fifth induced current in the first part and excites a sixth induced current in the second part in a coupling feeding mode, and the directions of the fifth induced current and the sixth induced current are the same.
In this implementation, the planar conductor or the linear conductor excites a CM-line antenna pattern of coupling feeding on the line antenna, while the loop conductor excites a DM-line antenna pattern of coupling feeding on the line antenna, forming a highly isolated antenna pair.
In one possible implementation manner, the high isolation antenna pair includes a radiator, a CM mode excited body and a DM mode excited body, and the CM mode excited body and the DM mode excited body are arranged at intervals;
the CM mode exciter and the DM mode exciter feed electric signals into the radiator from the middle part of the radiator in a coupling feeding mode, and the radiator forms a line antenna which comprises a first part and a second part, wherein the first part is a part from the middle part of the radiator to one end of the radiator, and the second part is a part from the middle part of the radiator to the other end of the radiator;
a gap exists between the CM mode exciting body and the radiating body, the CM mode exciting body comprises a planar conductor or a linear conductor, the planar conductor or the linear conductor excites a first induced current in a first part and excites a second induced current in a second part in a coupling feeding mode, and the directions of the first induced current and the second induced current are opposite;
the DM mode driver excites a fifth induced current in the first portion and a sixth induced current in the second portion by means of direct feeding, and directions of the fifth induced current and the sixth induced current are the same.
In this implementation, the planar conductor or the linear conductor excites a coupled-feed CM-line antenna pattern on the line antenna, while the exciter excites a DM-line antenna pattern on the line antenna, forming a highly isolated antenna pair.
In one possible implementation manner, the high isolation antenna pair includes a radiator, a CM mode excited body and a DM mode excited body, and the CM mode excited body and the DM mode excited body are arranged at intervals;
the CM mode exciter and the DM mode exciter feed electric signals into the radiator from the middle of the radiator in a coupling feed mode, the radiator forms a slot antenna, the slot antenna is formed by slotting on the shell, two ends of the radiator are connected with the shell, the slot antenna comprises a third part and a fourth part, the third part is a part from the middle of the radiator to one end of the radiator, and the fourth part is a part from the middle of the radiator to the other end of the radiator;
a gap exists between the CM mode exciter and the radiator, the CM mode exciter adopts an annular conductor, the annular conductor excites a third induced current in the third part and excites a fourth induced current in the fourth part in a coupling feeding mode, and the directions of the third induced current and the fourth induced current are the same;
the DM mode exciter excites a fifth induced current in the third part and excites a sixth induced current in the fourth part in a direct feeding mode, and the directions of the fifth induced current and the sixth induced current are opposite; or
A gap exists between the DM mode driver and the radiator, the DM mode driver includes a planar conductor or a linear conductor, the planar conductor or the linear conductor drives a fifth induced current in the third portion and a sixth induced current in the fourth portion in a coupling feeding manner, and directions of the fifth induced current and the sixth induced current are opposite.
In this implementation, the planar conductor or the linear conductor excites a DM slot antenna pattern of coupling feeding on the slot antenna, and the loop conductor excites a CM slot antenna pattern of coupling feeding on the slot antenna, forming a high isolation antenna pair.
In one possible implementation manner, the high isolation antenna pair includes a radiator, a CM mode excited body and a DM mode excited body, and the CM mode excited body and the DM mode excited body are arranged at intervals;
the CM mode exciter and the DM mode exciter feed electric signals into the radiator from the middle of the radiator in a coupling feed mode, the radiator forms a slot antenna, the slot antenna is formed by slotting on the shell, two ends of the radiator are connected with the shell, the slot antenna comprises a third part and a fourth part, the third part is a part from the middle of the radiator to one end of the radiator, and the fourth part is a part from the middle of the radiator to the other end of the radiator;
the CM mode exciter excites a third induced current in the third part and excites a fourth induced current in the fourth part in a direct feeding mode, and the directions of the third induced current and the fourth induced current are the same;
a gap exists between the DM mode driver and the radiator, the DM mode driver includes a planar conductor or a linear conductor, the planar conductor or the linear conductor drives a fifth induced current in the third portion and a sixth induced current in the fourth portion in a coupling feeding manner, and directions of the fifth induced current and the sixth induced current are opposite.
In this implementation, the exciter excites a DM slot antenna pattern on the slot antenna, while the loop conductor excites a coupled-feed CM slot antenna pattern on the slot antenna, forming a highly isolated antenna pair.
Drawings
Fig. 1 is a schematic structural diagram of a mobile terminal provided herein in some embodiments;
FIG. 2 is an exploded view of the mobile terminal provided herein;
FIG. 3 is a schematic illustration of the housing of FIG. 2 in some embodiments;
fig. 4A is a partially exploded view of a mobile terminal employing a coupled feeding line antenna structure provided herein, the coupled feeding line antenna structure shown in fig. 4A generating a line antenna CM pattern;
fig. 4B is a schematic view of the current distribution of the mobile terminal portion structure shown in fig. 4A;
fig. 4C is a schematic view of the electric field distribution in the moving terminal portion structure shown in fig. 4A;
FIG. 4D is a schematic view of the magnetic field distribution in the moving terminal portion structure of FIG. 4A;
fig. 4E is a schematic diagram of current distribution in a prior art directly fed CM-line antenna structure;
fig. 5A is a partially exploded view of a mobile terminal employing a coupled-feed line antenna structure according to the present application, the coupled-feed line antenna structure shown in fig. 5A generating a line antenna DM pattern;
FIG. 5B is a schematic view of the current distribution of the mobile terminal portion structure shown in FIG. 5A;
fig. 5C is a schematic view of the electric field distribution in the moving terminal portion structure shown in fig. 5A;
FIG. 5D is a schematic view of the magnetic field distribution in the moving terminal portion structure shown in FIG. 5A;
fig. 5E is a schematic view of current distribution in a prior art DM line antenna structure with direct feeding;
fig. 6A is a partially exploded view of a mobile terminal employing a coupled-feed slot antenna structure as provided herein, the coupled-feed slot antenna structure shown in fig. 6A resulting in a slot antenna CM pattern;
fig. 6B is a schematic view of the current distribution of the mobile terminal portion structure shown in fig. 6A;
fig. 6C is a schematic view of the electric field distribution in the moving terminal portion structure shown in fig. 6A;
fig. 6D is a schematic view of the magnetic field distribution in the moving terminal portion structure shown in fig. 6A;
fig. 6E is a schematic diagram of current distribution in a prior art CM slot antenna structure with direct feed;
FIG. 7A is a partially exploded view of a mobile terminal employing a coupled-feed slot antenna structure as provided herein, the coupled-feed slot antenna structure shown in FIG. 7A producing a slot antenna DM mode;
fig. 7B is a schematic view of the current distribution of the mobile terminal portion structure shown in fig. 7A;
fig. 7C is a schematic view of the electric field distribution in the moving terminal portion structure shown in fig. 7A;
FIG. 7D is a schematic view of the magnetic field distribution in the moving terminal portion structure of FIG. 7A;
figure 7E is a schematic diagram of the current distribution in a prior art direct fed DM slot antenna structure;
fig. 8A is a partially exploded view of a mobile terminal in some embodiments employing a pair of high isolation antennas provided herein;
figure 8B is the CM mode antenna radiation pattern of the high isolation antenna pair shown in figure 8A;
figure 8C is the antenna radiation pattern for the DM mode of the high isolation antenna pair shown in figure 8A;
FIG. 8D is an S-parameter plot for the high isolation antenna pair shown in FIG. 8A;
fig. 9A is a schematic structural diagram of a high isolation antenna pair provided by the present application in further embodiments;
FIG. 9B is a schematic diagram of a portion of the high isolation antenna pair shown in FIG. 9A at another angle;
FIG. 9C is an S-parameter plot for the high isolation antenna pair shown in FIG. 9A;
figure 9D is a schematic diagram of a high isolation antenna pair provided herein in further embodiments;
fig. 9E is a schematic structural diagram of a high isolation antenna pair provided by the present application in further embodiments;
figure 9F is a schematic diagram of a high isolation antenna pair provided by the present application in further embodiments;
figure 9G is a schematic structural diagram of a high isolation antenna pair provided herein in some embodiments;
fig. 10A is a partial structural diagram of a mobile terminal applying a DM line antenna structure of coupled feeding provided in the present application in some other embodiments;
fig. 10B is an antenna radiation efficiency graph of the antenna device shown in fig. 5A and the antenna device shown in fig. 10A;
fig. 11 is a partial structural diagram of a mobile terminal applying a DM line antenna structure of coupled feeding provided in the present application in some embodiments;
fig. 12 is a partial structural diagram of a mobile terminal applying a DM line antenna structure of coupled feeding provided in the present application in further embodiments;
fig. 13 is a partial structural diagram of a mobile terminal applying a DM line antenna structure of coupled feeding provided in the present application in further embodiments;
fig. 14 is a partial structural diagram of a mobile terminal to which a DM line antenna structure for coupling feeding provided by the present application is applied in some embodiments;
fig. 15 is a partial structural schematic diagram of a mobile terminal applying a DM line antenna structure of coupled feeding provided in the present application in other embodiments;
fig. 16 is a partial structural diagram of a mobile terminal applying a DM line antenna structure of coupled feeding provided in the present application in some more embodiments.
Detailed Description
The embodiments of the present application will be described below with reference to the drawings. Herein, "and/or" is only one kind of association relationship describing the association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two unless otherwise specified. "above" includes the present numbers, for example, two or more include two.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a mobile terminal 100 provided in the present application in some embodiments. For example, the mobile terminal 100 may be an electronic product such as a mobile phone, a tablet, a notebook, a wearable device, a point of sale (POS) terminal, a vehicle-mounted computer, and so on. In the embodiment of the present application, the mobile terminal 100 is a mobile phone as an example.
Illustratively, the mobile terminal 100 may employ communication techniques to implement communication functions, such as: bluetooth (BT) communication technology, Global Positioning System (GPS) communication technology, wireless fidelity (Wi-Fi) communication technology, global system for mobile communications (GSM) communication technology, Wideband Code Division Multiple Access (WCDMA) communication technology, Long Term Evolution (LTE) communication technology, 5G communication technology, Sub-6G communication technology, future other communication technologies, and the like. For example, the mobile terminal 100 may employ one communication technology or may employ multiple communication technologies, which is not limited in this application.
Illustratively, the mobile terminal 100 may include a display screen 1, a housing 2, and a rear cover 3. The display screen 1 and the rear cover 3 may be fixedly mounted on two sides of the housing 2 opposite to each other.
For example, the housing 2 may be made of a conductive material such as metal. In the present application, the housing 2 may serve as a ground plane for the electronic components. The electronic components in the mobile terminal 100 can be grounded by being electrically connected to the housing 2, thereby avoiding the problems of electric leakage and damage caused by large current impact. In other embodiments, the housing 2 may also be made of a composite material of metal and plastic, so as to reduce the weight of the housing 2 while ensuring the grounding performance, which is not limited in this application.
Illustratively, the rear cover 3 serves to protect the internal structure of the mobile terminal 100. The rear cover 3 may be made of metal, glass, ceramic, plastic, or the like.
Referring to fig. 1 and fig. 2 together, fig. 2 is an exploded schematic view of the mobile terminal 100 provided in the present application.
Illustratively, the housing 2 may include a bezel 20. The frame 20 is disposed around the casing 2, and the display screen 1 and the rear cover 3 may be fixedly connected to the frame 20. The bezel 20 may constitute a side of the mobile terminal 100. The frame 20 may be made of a metal material, and in this case, the frame 20 is suitable for metal ID (industrial design) of the mobile terminal 100; bezel 20 may also be made of a non-metallic material, and bezel 20 is suitable for use with a non-metallic ID of mobile terminal 100.
Illustratively, the mobile terminal 100 may further include an antenna device 4 for implementing communication functions. The antenna device 4 may be provided at a side of the housing 2. The mobile terminal 100 may perform transmission of communication signals through the antenna device 4 to implement a communication function.
Illustratively, the mobile terminal 100 may further include a circuit board (not shown). The circuit board may be an FR-4 dielectric board or a Rogers (Rogers) dielectric board, or a hybrid dielectric board including both Rogers and FR-4 dielectric boards. Wherein FR-4 is a flame-retardant material, and the Rogers dielectric plate is a high-frequency plate. For example, the circuit board may be mounted in a cavity of the mobile terminal 100 for carrying electronic components and transmitting signals in the mobile terminal 100. The circuit board may include a metal layer, and the electronic component may be grounded by being electrically connected to the metal layer. In this application, the metal layer of the circuit board may also serve as a ground plane for the electronic components.
For example, the antenna device 4 may be electrically connected to a circuit board and transmit an electrical signal through the circuit board. The antenna device 4 may also be grounded through the circuit board to reduce the noise of the rf signal and improve the transmission quality of the signal. In other embodiments, the antenna device 4 may also be electrically connected to the metal part of the housing 2 to achieve grounding, which is not limited in this application.
Referring to fig. 3, fig. 3 is a schematic structural diagram of the housing 2 shown in fig. 2 in some embodiments.
For example, the antenna device 4 may include a radiator 41 and an excitation body 42. The radiator 41 and the exciter 42 may be located at the side of the housing 2 and fixedly mounted to the housing 2. In particular, the housing 2 may be provided with a notch 21. The opening of the notch 21 is located at the outer surface 20 of the housing 2, and the notch 21 extends from the opening in a direction away from the outer surface 20. At least a portion of the structure of the radiator 41 may be located at the gap 21. The exciter 42 may be located inside the radiator 41 with a gap 43 between the radiator 41. Understandably, the inner side of the radiator 41 is a side of the radiator 41 facing away from the outside of the mobile terminal 100.
Illustratively, the housing 2 may include the housing 2, and the exciting body 42 may be connected to the housing 2 to realize the ground. The housing 2 may be made of a conductive material such as metal.
Illustratively, the housing 2 may further include a dielectric 22. The dielectric 22 together with the radiator 41 and the exciter 42 fills the gap 21. In the present application, the mobile terminal 100 includes a structure having an outer surface that is a surface of the structure that is in contact with the outside of the mobile terminal 100. For example, the outer surface 20 of the case 2 is a surface of the case 2 contacting the outside of the mobile terminal 100; the outer surface 410 of the radiator 41 is a surface of the radiator 41 contacting the outside of the mobile terminal 100; the outer surface of the dielectric 22 is a surface of the dielectric 22 that is in contact with the exterior of the mobile terminal 100.
For example, both ends of the radiator 41 may be fixedly connected to the housing 2, and both ends of the radiator 41 may also be fixedly mounted to the notch 21 through the dielectric 22 with a gap between the radiator and the housing 2. In the present application, the notch 21 is surrounded by the second sidewall 212, the first sidewall 211 and the third sidewall 213 which are connected in sequence, the first sidewall 211 of the notch 21 faces the opening of the notch 21, and the second sidewall 212 of the notch 21 and the third sidewall 213 of the notch 21 are oppositely arranged.
For example, both ends of the radiator 41 may be fixedly connected to the second sidewall 212 and the third sidewall 213 of the notch 21, and both ends of the radiator 41 may also be fixedly mounted to the notch 21 through the dielectric 22 with a gap between the second sidewall 212 and the third sidewall 213 of the notch 21.
Illustratively, the excitation body 42 may be made of a conductive material, such as metal, conductive rubber, conductive plastic, or the like. The exciter 42 may be used to receive electrical signals from other devices of the mobile terminal 100, such as a Central Processing Unit (CPU).
For example, the radiator 41 may be made of a conductive material, such as metal, conductive rubber, conductive plastic, or the like.
In this embodiment, the exciter 42 may be used as a feeding stub of the antenna to feed the radio frequency signal to the radiator 41 by coupling feeding. The radiator 41 may be used as the antenna body structure to radiate the rf signal coupled by the exciter 42.
In the embodiment, the outer surface 410 of the radiator 41 and the outer surface of the dielectric 22 may be in smooth transition, and the outer surface 410 of the radiator 41, the outer surface of the dielectric 22 and the outer surface 20 of the housing 2 together form a side surface of the external appearance of the mobile terminal 100, so as to meet the ID design of the mobile terminal 100, ensure the aesthetic property of the mobile terminal 100 and the hand-held feeling of the user.
In the present application, the radiator 41 is disposed at the side of the housing 2, so as to avoid the influence of other working elements of the mobile terminal 100 and reduce the noise of signals. In addition, the outer surface 410 of the radiator 41 forms the appearance of the mobile terminal 100, that is, the outer surface 410 of the radiator 41 contacts the outside of the mobile terminal 100, so that the shielding of other structures can be avoided, and the transceiving performance of the radio frequency signal can be improved. In other embodiments, the radiator 41 may also be located in the cavity of the mobile terminal 100, which is not limited in this application.
For example, the gap 43 between the exciter 42 and the radiator 41 may have a value less than 2mm, for example, 1mm, 0.1mm, 0.05mm, etc., so as to ensure that there is a certain coupling between the exciter 42 and the radiator 41, so that the radiator 41 can be fed. It will be appreciated that the smaller the gap 43, the stronger the coupling between the exciter 42 and the radiator 41. In addition, the antenna device 4 provided by the present application is small in size, occupies a small volume of the housing 2, and is advantageous for miniaturization of the mobile terminal 100.
The present application provides various designs of the antenna device 4, and the following will specifically describe various designs of the antenna device 4.
Referring to fig. 4A, fig. 4A is a partially exploded view of a mobile terminal 100a applying a coupled feeding line antenna structure provided in the present application, where the coupled feeding line antenna structure shown in fig. 4A generates a line antenna CM mode.
In the first embodiment, the mobile terminal 100a may include a case 2a, a radiator 41a, and a mover 42a, and the case 2 may be provided with a notch 21 a. The radiator 41a and the exciting body 42a may be located at a side of the case 2a and fixedly mounted to the case 2 a. At least a portion of the structure of the radiator 41a may be located at the notch 21 a. The exciting body 42a may be located inside the radiator 41a with a gap 43a therebetween. The housing 2a may also include a dielectric 22 a. The dielectric 22a together with the radiator 41a and the exciting body 42a fills the gap 21 a. The structure of the mobile terminal 100a and the connection relationship between the structures in the present embodiment may refer to the mobile terminal 100 as shown in fig. 3, and only differences will be described here.
In the present embodiment, a gap is formed between both ends of the radiator 41a and the case 2 a. The radiator 41a may form a line antenna. Illustratively, the radio frequency signal may radiate out through the outer surface 410a of the radiator 41 a. The outer surface 410a of the radiator 41a may be curved to conform to a metal ID design and ensure the aesthetic appearance and grip feel of the mobile terminal 100 a.
In this embodiment, the exciting body 42a may be made of a conductive material so as to generate a uniform alternating electric field around the exciting body 42 a.
Illustratively, the excitation body 42a may include a planar conductor 421 a. Understandably, the planar conductor is a planar conductor. Specifically, a surface of the planar conductor 421a facing the outer surface 410a of the radiator 41a is a plane. In other embodiments, the planar conductor 421a may also be a curved surface, that is, the surface of the planar conductor 421a opposite to the outer surface 410a of the radiator 41a is a curved surface, which is not limited in this application.
In other embodiments, the excitation conductor 421a may be a linear conductor (not shown). Understandably, the linear conductor is a strip-shaped conductor.
Illustratively, the actuating body 42a may further include a connecting wire 422 a. One end of the connecting wire 422a is connected to the planar conductor 421a, and the other end is connected to the first sidewall 211a of the notch 21a, that is, the housing 2a, so as to achieve grounding. In the present application, the first sidewall 211a of the notch 21a is a sidewall of the notch 21a facing the outer surface 20a of the housing 2. Illustratively, the housing 2a may be made of a conductive material such as metal, and the connection line 422a is connected to the housing 2a to be grounded, so as to avoid noise in the external environment of the excitation body 42a from interfering with the electrical signal propagated on the excitation body 42a, reduce noise in the electrical signal, and improve the propagation quality of the electrical signal.
For example, the connecting line 422a may be connected to a side of the planar conductor 421a, and the connecting line 422a may be connected to a central region of the planar conductor 421 a.
Illustratively, the connection line 422a may be a radio frequency transmission line such as a microstrip line or a coaxial line, so as to improve the transmission efficiency of the electrical signal, avoid interference from an external environment, and reduce noise in the electrical signal. In other embodiments, the connection line 422a may also be a metal sheet or a metal wire, which is not limited in this application. Illustratively, the excitation body 42a may have a feed point 423 a. The feed point 423a may be located at the other end of the connecting line 422a from the planar conductor 421 a.
In other embodiments, the exciting body 42a may not include the connecting line 422a, and in this case, the feed point 423a may be located in the middle of the planar conductor 421a, or may be located in other areas offset from the middle of the planar conductor 421 a.
Illustratively, the mobile terminal 100a may also include a feed (not shown). The feed is connected to the feed point 423a for providing an electrical signal and feeding the electrical signal through the feed point 423a to the excitation body 42 a.
Referring to fig. 4B, fig. 4B is a schematic diagram of current distribution of a portion of the structure of the mobile terminal 100a shown in fig. 4A. Wherein, the size of the arrow indicates the intensity of the current, and the size of the arrow indicates the intensity of the current.
Illustratively, the exciter 42a feeds an electrical signal to the radiator 41a from the middle of the radiator 41a by means of coupling feeding. The portion between both ends of the radiator 41a can be regarded as the middle of the radiator 41 a. The feed point 423a of the exciting body 42a corresponds to the middle of the radiator 41 a.
For example, the radiator 41a may form a line antenna, and the line antenna may include a first portion 411a and a second portion 412 a. The first portion 411a is a portion from the middle of the radiator 41a to one end of the radiator 41a, and the second portion 412a is a portion from the middle of the radiator 41a to the other end of the radiator 41 a.
In the first embodiment, the exciter 42a feeds the radiator 41a by electric field coupling, and this coupling feeding may be substituted for CM feeding of equal amplitude and in phase to transmit an electric signal to the radiator 41 a. The resulting antenna pattern is also a line antenna CM pattern. The positive pole of the feed source can be connected with the feed point 423a, and the negative pole of the feed source can be connected with the shell 2 to realize grounding. A current flows from the feed point 423a to the exciting body 42a, thereby generating an alternating electric field (not shown) around the exciting body 42 a. The alternating electric field provides excitation signals of equal amplitude and in phase to the first and second portions 411a and 412a of the radiator 41a, respectively. The first portion 411a and the second portion 412a generate a first induced current and a second induced current respectively under the action of the excitation signals with equal amplitude and in phase, and the directions of the first induced current and the second induced current are opposite. At this time, the operation mode of the radiator 41a is the CM mode of the line antenna, and the structure of the antenna device 4a in the first embodiment is a coupling excited CM line antenna structure.
Illustratively, the middle of the radiator 41a is equidistant from the two ends of the radiator 41a, and the first portion 411a and the second portion 412a have the same length. In this embodiment, the radiator 41a may extend along a straight line, the lengths of the first portion 411a and the second portion 412a are equal to generate a radiation pattern with symmetrical distribution, and the radiation efficiency of the radiator 41a is improved, and the frequencies of the first induced current and the second induced current are the same. In other embodiments, the radiator 41a may also extend along a curve.
In the present application, the current distribution shown in fig. 4B is a current distribution of a CM-line antenna pattern. The first portion 411a and the second portion 412a of the radiator 41a together constitute a radiation branch.
Referring to fig. 4C and 4D together, fig. 4C is a schematic diagram of an electric field distribution in the partial structure of the mobile terminal 100a shown in fig. 4A, and fig. 4D is a schematic diagram of a magnetic field distribution in the partial structure of the mobile terminal 100a shown in fig. 4A. In fig. 4C, the direction of the dotted arrow indicates the direction of the electric field, and the density of the dotted arrow indicates the strength of the electric field. In fig. 4D, a graph in which the center of the circle is dotted and a graph in which the center of the circle is crossed indicate the direction of the magnetic induction line, and the magnitude of the graphs indicates the strength of the magnetic field. Specifically, the circle center-dotted graph indicates that the magnetic induction line vertically exits from the inside of the paper surface to the outside of the paper surface, and the circle center-crossed graph indicates that the magnetic induction line vertically exits from the outside of the paper surface to the inside of the paper surface.
In the first embodiment, the radiator 41a radiates electromagnetic waves to the outside, that is, an electric field and a magnetic field are generated in the dielectric 22a between the radiator 41a and the case 2a and the space outside the mobile terminal 100 a. As shown in fig. 4C, when the radiator 41a is in the CM mode, the electric field is distributed in the same direction at both sides of the feed point 423a of the radiator 41a, and the electric field intensity of the electric field is increased from the feed point 423a of the radiator 41a to both ends of the radiator 41 a. In the present embodiment, the electric field lines at both sides of the feeding point 423a of the radiator 41a repel each other in the same direction, so that the electric field lines at both sides of the feeding point 423a of the radiator 41a extend in a direction away from the radiator 41a, so that the electric field of the CM-line antenna pattern exhibits vertical polarization.
Further, as shown in fig. 4D, when the radiator 41a is in the CM-line antenna mode, the magnetic induction lines are reversely arranged on both sides of the feed point 423a of the radiator 41a such that the magnetic induction lines are arranged in a loop shape in a plane parallel to the outer surface 410a of the radiator 41 a. The magnetic field strength of the magnetic field decreases from the feed point 423a of the radiator 41a toward both ends of the radiator 41 a.
In the present application, the electric field shown in fig. 4C and the magnetic field shown in fig. 4D are generated by two portions of the radiator 41a as an 1/4-wavelength antenna, and the electric field distribution shown in fig. 4C is the electric field distribution of the CM-line antenna mode, and the magnetic field distribution shown in fig. 4D is the magnetic field distribution of the CM-line antenna mode.
Please refer to FIG. 4B and FIG. 4E. Fig. 4E is a schematic diagram of current distribution in a CM-line antenna structure of direct feeding in the related art.
Referring to fig. 4E, a CM mode may be excited on a strip radiator by a symmetric feeding manner, that is, two equal-amplitude and in-phase rf signals are respectively fed from a feeding point 423A of the radiator 41A to the first portion 411A and the second portion 412A. In the prior art, a CM mode is generally excited on a line antenna by adopting a direct symmetric feed mode, that is, two paths of radio-frequency signals with equal amplitude and same phase are provided by two feed sources. However, in the process of engineering implementation, due to the difference of structure and material, it is difficult to obtain two identical feed sources, so that it is difficult to provide radio frequency signals with equal amplitude and in phase.
Referring to fig. 4B, the coupled CM-line antenna structure in the first embodiment adopts a single-point feeding manner to feed to the exciter 42a, and the exciter 42a performs coupled feeding on the radiator 41a, so as to reduce feeding difficulty and improve radiation efficiency and bandwidth potential of the radiator 41 a.
Referring to fig. 5A, fig. 5A is a partially exploded view of a mobile terminal 100b applying a coupled feeding line antenna structure provided in the present application, where the coupled feeding line antenna structure shown in fig. 5A generates a line antenna DM mode.
In the second embodiment, the mobile terminal 100b may include a case 2b, a radiator 41b, and a exciting body 42b, and the case 2b may be provided with a notch 21 b. The radiator 41b and the exciting body 42b may be located at a side of the case 2b and fixedly mounted to the case 2 b. At least a portion of the structure of the radiator 41b may be located in the gap 21 b. The exciting body 42b may be located inside the radiator 41b with a gap from the radiator 41 b. The structure of the mobile terminal 100b and the connection relationship between the structures in the present embodiment may refer to the mobile terminal 100 as shown in fig. 3, and only differences will be described here.
In the present embodiment, the radiator 41b may form a line antenna. The specific structure of the line antenna and the connection relationship with other structures can refer to the first embodiment, and are not described herein again.
In this embodiment, the exciting body 42b may include a ring-shaped conductor 421b so as to generate a uniform alternating magnetic field around the exciting body 42 b. Both ends of the annular conductor 421b may be connected to the case 2b to realize grounding; a gap may exist between the middle portion of the annular conductor 421b and the housing 2 b. For example, the annular conductor 421b may be located at a side of the first sidewall 211b of the notch 21b, or may be located at a middle of the first sidewall 211b of the notch 21b, which is not limited in this application. Understandably, the middle of the first sidewall 211b is a portion inside the side edge of the first sidewall 211 b.
Illustratively, the excitation body 42b may further include a feeding point 423b, and the feeding point 423b may be equidistant from both ends of the loop conductor 421 b. The mobile terminal 100b may also include a feed (not shown). The feed feeds an electrical signal from a feed point 423b to the active volume 42b, producing an alternating current on the active volume 42 b. The alternating current generates an alternating magnetic field around the exciting body 42 b. The radiator 41b generates an induced current under excitation of the alternating magnetic field, and the mode of the induced current is a mode of the line antenna DM. Then, the radiator 41b converts the induced current into a radio frequency signal and radiates the radio frequency signal.
Referring to fig. 5B, fig. 5B is a schematic diagram of current distribution of a portion of the structure of the mobile terminal 100B shown in fig. 5A. Wherein, the size of the arrow indicates the intensity of the current, and the size of the arrow indicates the intensity of the current.
In the second embodiment, the exciter 42b feeds the radiator 41b by magnetic field coupling, and excites the mode of the antenna DM. This excitation can replace the DM antisymmetric feeding of the prior art to transmit the electrical signal to the radiator 41 b. Specifically, the positive electrode of the feed source may be connected to the feed point 423b, and the negative electrode of the feed source may be connected to the housing 2 to achieve grounding. A current flows from the feed point 423b to the exciting body 42b, thereby generating an alternating magnetic field (not shown) around the exciting body 42 b. At this time, the operation mode of the radiator 41b is the DM mode of the line antenna, and the structure of the antenna device 4b in the second embodiment is a coupling excited DM line antenna structure.
When the radiator 41b is in the DM mode, the intensity of the induced current on the radiator 41b is weakened from the feed point 423b of the radiator 41b to both ends. Further, the intensity of the alternating current on the exciting body 42b decreases from the feed point 423b of the exciting body 42b to both ends, so that the magnetic field intensity of the alternating magnetic field around the exciting body 42b decreases from the feed point 423b of the exciting body 42b to both ends. Accordingly, the intensity distribution of the magnetic field strength of the alternating magnetic field around the exciting body 42b matches the intensity distribution of the induced current on the radiator 41b, so that the alternating magnetic field around the exciting body 42b can excite the induced current of the DM mode on the radiator 41b and make the radiator 41b in the DM mode.
In the present application, the current distribution shown in fig. 5B is a current distribution of the DM line antenna pattern. The first portion 411b and the second portion 412b of the radiator 41b together constitute a radiation branch.
Illustratively, the electrical signal in the housing 2b is distributed around the excitation body 42 b. The electrical signal flows from a distance away from the feed point 423b to the feed point 423b, and the electrical signal is strongest at the feed point 423b and decreases with increasing distance from the feed point 423 b. Therefore, the intensity distribution of the electric field intensity of the alternating electric field generated around the casing 2b matches the intensity distribution of the induced current on the radiator 41b, so that the alternating electric fields generated around the exciting body 42b can be superposed, and the coupling capacity of the alternating electric field is increased.
Illustratively, the loop conductor 421b may take a frame-shaped configuration. The frame structure includes a first stage 4211b, a second stage 4212b, and a third stage 4213b connected in series. The second segment 4212b may be parallel to the extending direction of the radiator 41b, and the first segment 4211b and the third segment 4213b may be respectively located at both ends of the second segment 4212 b. In the present application, the feed point 423b may be equidistant from both ends of the second segment 4212b of the loop conductor 421 b.
Illustratively, the first segment 4211b and the portion of the second segment 4212b of the ring conductor 421b between the first segment 4211b and the feed point 423b may be microstrip lines, coaxial lines, or other radio frequency transmission line structures. The rf transmission line structure can be used to transmit an electrical signal from the feed source to the feed point 423b and feed the electrical signal from the feed source to the exciting body 42b through the feed point 423b, so that the intensity of the alternating current on the exciting body 42b is weakened from the feed point 423b of the exciting body 42b to both ends, thereby exciting a DM mode on the radiator 41 b.
For example, the length of the second segment 4212b of the loop conductor 421b may be greater than 1mm, for example, 10mm, 19mm, 30mm, etc., so as to ensure the radiation efficiency of the radiator 41 and reduce the difficulty of impedance matching.
In other embodiments, the annular conductor 421b may also adopt a circular ring structure, an elliptical ring structure, or other irregular shape structures, which is not limited in this application.
Referring to fig. 5C and 5D together, fig. 5C is a schematic diagram of an electric field distribution in the partial structure of the mobile terminal 100b shown in fig. 5A, and fig. 5D is a schematic diagram of a magnetic field distribution in the partial structure of the mobile terminal 100b shown in fig. 5A. In fig. 5C, the direction of the dotted arrow indicates the direction of the electric field, and the density of the dotted arrow indicates the strength of the electric field. In fig. 5D, a graph in which the center of the circle is dotted and a graph in which the center of the circle is crossed indicate the direction of the magnetic induction line, and the magnitude of the graphs indicates the strength of the magnetic field. Specifically, the circle center-dotted graph indicates that the magnetic induction line vertically exits from the inside of the paper surface to the outside of the paper surface, and the circle center-crossed graph indicates that the magnetic induction line vertically exits from the outside of the paper surface to the inside of the paper surface.
In the second embodiment, as shown in fig. 5C, when the radiator 41b is in the DM mode, the electric field is distributed in opposite directions on both sides of the feed point 423b of the radiator 41b, and the electric field intensity of the electric field is increased from the feed point 423b of the radiator 41b to both ends of the radiator 41 b.
In the present embodiment, the electric field lines on both sides of the feeding point 423b of the radiator 41b are attracted in opposite directions, so that the electric field lines on both sides of the feeding point 423b of the radiator 41b are connected end to end at the feeding point 423b, thereby generating electric field lines parallel to the extending direction of the radiator 41b, so that the DM line antenna mode exhibits horizontal polarization.
In addition, the electric field distribution is also present near the outer surface 20b of the case 2b, and the electric field near the outer surface 20b of the case 2b is opposite to the electric field near the outer surface 410b of the adjacent radiator 41b, so that electric field lines parallel to the extending direction of the radiator 41b are generated near the gap between the case 2b and the radiator 41b, thereby increasing the intensity of horizontal polarization of the coupling excited DM mode and improving the radiation efficiency.
In addition, as shown in fig. 5D, the magnetic induction lines are distributed in the same direction on both sides of the feed point 423b of the radiator 41 b. Illustratively, the magnetic induction lines are emitted from a side of the radiator 41b close to the housing 2b and emitted from a side of the radiator 41b far from the housing 2b, so that the magnetic induction lines are distributed in a circle in a plane perpendicular to the extending direction of the radiator 41 b. The magnetic field strength of the magnetic field decreases from the feed point 423b of the radiator 41b to both ends of the radiator 41 b.
In the present application, the electric field shown in fig. 5C and the magnetic field shown in fig. 5D are generated by two portions of the radiator 41b as an 1/2-wavelength antenna, and the electric field distribution shown in fig. 5C is the electric field distribution of the DM-wire antenna mode, and the magnetic field distribution shown in fig. 5D is the magnetic field distribution of the DM-wire antenna mode.
Please refer to FIG. 5B and FIG. 5E. Fig. 5E is a schematic view of current distribution in a prior art DM wire antenna structure that is directly fed.
Referring to fig. 5E, a DM mode may be excited on the radiator 41B of the bar radiator by means of anti-symmetric feeding, that is, two equal-amplitude and opposite-phase rf signals are respectively fed from the feeding point 423B of the radiator 41B to the first portion 411B and the second portion 412B. In the prior art, a direct antisymmetric feeding mode is generally adopted to excite a DM mode on a line antenna, namely two paths of radio-frequency signals with equal amplitude and opposite phase are provided by two feed sources, and a feeding structure is complex.
Referring to fig. 5B, the DM-wire antenna structure with coupled feeding in the first embodiment adopts a single-point feeding manner to feed to the exciter 42B, and performs coupled feeding on the radiator 41B through the exciter 42B, so as to reduce feeding difficulty and improve radiation efficiency and bandwidth potential of the radiator 41B.
Referring to fig. 6A, fig. 6A is a partially exploded view of a mobile terminal 100c applying a coupled slot antenna structure provided in the present application, where the coupled slot antenna structure shown in fig. 6A generates a slot antenna CM mode.
In the third embodiment, the mobile terminal 100c may include a case 2c, a radiator 41c, and a exciting body 42c, and the case 2c may be provided with a notch 21 c. The radiator 41c and the exciting body 42c may be located at a side of the case 2c and fixedly mounted to the case 2 c. At least a portion of the structure of the radiator 41c may be located in the gap 21 c. The exciting body 42c may be located inside the radiator 41c with a gap from the radiator 41 c. The structure of the mobile terminal 100c and the connection relationship between the structures in the present embodiment may refer to the mobile terminal 100 as shown in fig. 3, and only differences will be described here.
In the present embodiment, the radiator 41c may form a slot antenna. The slot antenna may be formed by slotting the housing 2 with an opening at a first side of the slot, which may be located at an intermediate position of the first side.
Illustratively, the exciter 42c feeds an electrical signal to the radiator 41c from the middle of the radiator 41c by means of coupling feeding. The portion between both ends of the radiator 41c can be regarded as the middle of the radiator 41 c. The feed point 423c of the exciting body 42c corresponds to the middle of the radiator 41 c.
Illustratively, both ends of the radiator 41c may be connected to the case 2 c. The slot antenna may include a third portion 413c and a fourth portion 414 c. The third portion 413c is a portion from the middle of the radiator 41c to one end of the radiator 41c, and the fourth portion 414c is a portion from the middle of the radiator 41c to the other end of the radiator 41 c.
Illustratively, a parallel capacitance 424c may be present between the third portion 413c and the fourth portion 414 c. In other embodiments, there may be no gap between the third portion 413c and the fourth portion 414c, which is not limited in this application.
Illustratively, one end of the third portion 413c is connected to the second sidewall 212c of the notch 21c, the other end of the third portion 413c is spaced from one end of the fourth portion 414c, and the other end of the fourth portion 414c is connected to the third sidewall 213c of the notch 21 c.
In this embodiment, the excitation body 42c may include a ring conductor 421c, and the specific structure of the excitation body 42c and the connection relationship with other structures may refer to the second embodiment, which is not described herein again.
Referring to fig. 6B, fig. 6B is a schematic diagram of current distribution of a portion of the structure of the mobile terminal 100c shown in fig. 6A. Wherein, the size of the arrow indicates the intensity of the current, and the size of the arrow indicates the intensity of the current.
In the third embodiment, the exciter 42c couples and feeds the radiator 41c by means of magnetic field coupling. This feeding is the same as the antisymmetric feeding excited by the prior art slot antenna CM and is an alternative. To transmit the electric signal to the radiator 41 c. Specifically, the positive electrode of the feed source may be connected to the feed point 423c, and the negative electrode of the feed source may be connected to the housing 2c to achieve grounding. A current flows from the feed point 423c to the exciting body 42c, thereby generating an alternating magnetic field (not shown) around the exciting body 42 c. The coupled feeding may be understood as providing equal amplitude and opposite phase excitation signals to the third part 413c and the fourth part 414c of the radiator 41c, respectively. The third part 413c and the fourth part 414c respectively generate a third induced current and a fourth induced current under the action of the excitation signals with equal amplitudes and opposite phases, and the directions of the third induced current and the fourth induced current are the same. At this time, the operation mode of the radiator 41c is the CM mode of the slot antenna, and the structure of the antenna device 4c in the third embodiment is a coupling-excited CM slot antenna structure.
When the radiator 41c is in the slot antenna CM mode, the intensity of induced current on the radiator 41c increases from the feed point 423c of the radiator 41c to both ends. Further, the intensity of the alternating current on the exciting body 42c decreases from the feed point 423c of the exciting body 42c to both ends, so that the magnetic field intensity of the alternating magnetic field around the exciting body 42c decreases from the feed point 423c of the exciting body 42c to both ends. Accordingly, the intensity distribution of the magnetic field intensity of the alternating magnetic field around the exciting body 42c matches the intensity distribution of the intensity of the induced current on the radiator 41c, so that the alternating magnetic field around the exciting body 42c can excite the induced current of the CM mode on the radiator 41c and make the radiator 41c in the CM mode.
In the present application, the current distribution shown in fig. 6B is a current distribution of a CM slot antenna pattern.
Illustratively, the middle of the radiator 41c is equidistant from both ends of the radiator 41c, and the third portion 413c and the fourth portion 414c have equal lengths. In this embodiment, the radiator 41c may extend along a straight line, the lengths of the third portion 413c and the fourth portion 414c are equal to generate a symmetrically distributed radiation pattern, and the radiation efficiency of the radiator 41c is improved, and the frequencies of the third induced current and the fourth induced current are the same.
Referring to fig. 6C and 6D together, fig. 6C is a schematic diagram of an electric field distribution in the partial structure of the mobile terminal 100C shown in fig. 6A, and fig. 6D is a schematic diagram of a magnetic field distribution in the partial structure of the mobile terminal 100C shown in fig. 6A. In fig. 6C, the direction of the dotted arrow indicates the direction of the electric field, and the density of the dotted arrow indicates the strength of the electric field. In fig. 6D, a graph in which the center of the circle is dotted and a graph in which the center of the circle is crossed indicate the direction of the magnetic induction line, and the magnitude of the graphs indicates the strength of the magnetic field. Specifically, the circle center-dotted graph indicates that the magnetic induction line vertically exits from the inside of the paper surface to the outside of the paper surface, and the circle center-crossed graph indicates that the magnetic induction line vertically exits from the outside of the paper surface to the inside of the paper surface.
In the third embodiment, as shown in fig. 6C, when the radiator 41C is in the CM mode, the electric field is distributed in opposite directions on both sides of the feed point 423C of the radiator 41C, and the electric field strength of the electric field is weakened from the feed point 423C of the radiator 41C to both ends of the radiator 41C.
In the present embodiment, the electric field lines on both sides of the feeding point 423c of the radiator 41c are attracted in opposite directions, so that the electric field lines on both sides of the feeding point 423c of the radiator 41c are connected end to end at the feeding point 423c, thereby generating electric field lines parallel to the extending direction of the radiator 41c, so that the CM-slot antenna pattern exhibits horizontal polarization.
Further, as shown in fig. 6D, the magnetic induction lines are reversely arranged on both sides of the feeding point 423c of the radiator 41c such that the magnetic induction lines are arranged in a loop shape in a plane perpendicular to the extending direction of the radiator 41 c. The magnetic field strength of the magnetic field decreases from the feed point 423c of the radiator 41c toward both ends of the radiator 41 c.
In the present application, the electric field shown in fig. 6C and the magnetic field shown in fig. 6D are generated by two portions of the radiator 41C as an 1/4-wavelength antenna, and the electric field distribution shown in fig. 6C is the electric field distribution of the CM slot antenna pattern and the magnetic field distribution shown in fig. 6D is the magnetic field distribution of the CM slot antenna pattern.
Please refer to FIG. 6B and FIG. 6E. Fig. 6E is a schematic diagram of current distribution in a prior art CM slot antenna structure with direct feed.
Referring to fig. 6E, a CM mode may be excited on the radiator 41C using a slot radiator through an anti-symmetric feeding manner, that is, two equal-amplitude and opposite-phase rf signals are respectively fed from the feeding point 423C of the radiator 41C to the third portion 413C and the fourth portion 414C. In the prior art, a CM mode is generally excited on the radiator 41C by adopting a direct anti-symmetric feeding mode, that is, two paths of radio-frequency signals with equal amplitude and opposite phase are provided by two feed sources, and the feeding structure is complex.
Referring to fig. 6B, the CM slot antenna structure with coupled feeding in the third embodiment adopts a single-point feeding manner to feed power to the exciter 42c, and performs coupled feeding on the radiator 41c through the exciter 42c, so as to reduce feeding difficulty and improve radiation efficiency and bandwidth potential of the radiator 41 c.
Referring to fig. 7A, fig. 7A is a partially exploded view of a mobile terminal 100d applying a coupled slot antenna structure according to the present application, where the coupled slot antenna structure shown in fig. 7A generates a slot antenna DM mode.
In the fourth embodiment, the mobile terminal 100d may include a case 2d, a radiator 41d, and a mover 42d, and the case 2d may be provided with a notch 21 d. The radiator 41d and the exciter 42d may be located at a side of the housing 2d and fixedly mounted to the housing 2 d. At least a portion of the structure of the radiator 41d may be located in the gap 21 d. The exciting body 42d may be located inside the radiator 41d with a gap from the radiator 41 d. The structure of the mobile terminal 100d and the connection relationship between the structures in the present embodiment may refer to the mobile terminal 100 as shown in fig. 3, and only differences will be described here.
In the present embodiment, the radiator 41c may form a slot antenna. The slot antenna may be formed by slotting the housing 2.
In this embodiment, the excitation body 42d may include a linear conductor 421d and a feed point 423 d. Illustratively, the planar conductor 421a shown in fig. 4A may be used as the exciting body 42 d. As shown in fig. 7A, the feed point 423d may be located in the middle of the linear conductor 421 d. Specifically, the distances from the two ends of the linear conductor 421d to the feed point 423d may be equal or unequal, which is not limited in this application. In this embodiment, the positive electrode of the feed source may be connected to the feed point 423d, and the negative electrode of the feed source may be connected to the housing 2d, so as to implement grounding. In this embodiment, the specific structure of the line conductor 421d and the connection relationship with other structures can refer to the third embodiment, and are not described herein again.
Referring to fig. 7B, fig. 7B is a schematic diagram of current distribution of a portion of the structure of the mobile terminal 100d shown in fig. 7A. Wherein, the size of the arrow indicates the intensity of the current, and the size of the arrow indicates the intensity of the current.
For example, the radiator 41d may be divided into a third portion 413d and a fourth portion 414d having equal lengths.
In the fourth embodiment, the exciter 42d feeds the radiator 41d by means of electric field coupling, which may be equivalent to DM symmetric feeding, to transmit an electrical signal to the radiator 41 d. Specifically, the alternating electric field provides excitation signals of equal amplitude and in phase to the third and fourth portions 413d and 414d of the radiator 41d, respectively. The third portion 413d and the fourth portion 414d generate a third induced current and a fourth induced current respectively under the action of the excitation signals with equal amplitude and in phase, and the directions of the third induced current and the fourth induced current are opposite. At this time, the operation mode of the radiator 41d is the DM mode of the slot antenna, and the structure of the antenna device 4d in the fourth embodiment is a coupling excited DM slot antenna structure.
When the radiator 41d is in the DM mode, the intensity of induced current on the radiator 41d increases from the feed point 423d of the radiator 41d to both ends. Further, the intensity distribution of the magnetic field intensity of the alternating magnetic field around the exciting body 42d matches the intensity distribution of the intensity of the induced current on the radiator 41d, so that the alternating magnetic field around the exciting body 42d can excite the induced current of the DM mode on the radiator 41d and make the radiator 41d in the DM mode.
In the present application, the current distribution shown in fig. 7B is a current distribution of the DM slot antenna pattern.
Referring to fig. 7C and 7D together, fig. 7C is a schematic diagram of an electric field distribution in the partial structure of the mobile terminal 100D shown in fig. 7A, and fig. 7D is a schematic diagram of a magnetic field distribution in the partial structure of the mobile terminal 100D shown in fig. 7A. In fig. 7C, the direction of the dotted arrow indicates the direction of the electric field, and the density of the dotted arrow indicates the strength of the electric field. In fig. 7D, a graph in which the center of the circle is dotted and a graph in which the center of the circle is crossed indicate the direction of the magnetic induction line, and the magnitude of the graphs indicates the strength of the magnetic field. Specifically, the circle center-dotted graph indicates that the magnetic induction line vertically exits from the inside of the paper surface to the outside of the paper surface, and the circle center-crossed graph indicates that the magnetic induction line vertically exits from the outside of the paper surface to the inside of the paper surface.
In the fourth embodiment, the radiator 41d radiates electromagnetic waves to the outside, that is, an electric field and a magnetic field are generated in the dielectric 22d between the radiator 41d and the case 2d and the space outside the mobile terminal 100 d. As shown in fig. 7C, when the radiator 41d is in the DM slot antenna mode, the electric field is distributed in the same direction on both sides of the feed point 423d of the radiator 41d, and the electric field strength of the electric field is increased from the feed point 423d of the radiator 41d to both ends of the radiator 41 d.
In this embodiment, the electric field lines at both sides of the feeding point 423d of the radiator 41d repel each other in the same direction, so that the electric field lines at both sides of the feeding point 423d of the radiator 41d extend in a direction away from the radiator 41d, so that the electric field of the DM slot antenna pattern exhibits vertical polarization.
Further, as shown in fig. 7D, when the radiator 41D is in the DM slot antenna mode, the magneto-inductance lines are reversely arranged on both sides of the feed point 423D of the radiator 41D, so that the magneto-inductance lines are arranged in a loop shape in a plane parallel to the outer surface 410D of the radiator 41D. The magnetic field strength of the magnetic field decreases from the feed point 423d of the radiator 41d toward both ends of the radiator 41 d.
In the present application, the electric field shown in fig. 7C and the magnetic field shown in fig. 7D are generated by two portions of the radiator 41D as an 1/2-wavelength antenna, and the electric field distribution shown in fig. 7C is the electric field distribution of the DM slot antenna pattern, and the magnetic field distribution shown in fig. 7D is the magnetic field distribution of the DM slot antenna pattern.
Please refer to FIG. 7D and FIG. 7E. Figure 7E is a schematic diagram of the current distribution in a prior art direct fed DM slot antenna structure.
Referring to fig. 7E, a DM mode may be excited by using a slot radiator through a symmetric feeding manner, that is, two paths of equal-amplitude and in-phase radio frequency signals are fed from the feeding point 423D to the third portion 413D and the fourth portion 414D, respectively. In the prior art, a direct symmetric feed mode is generally adopted to excite a DM mode on a slot antenna, that is, two paths of radio frequency signals with equal amplitude and same phase are provided by two feed sources. However, in the process of engineering implementation, due to the difference of structure and material, it is difficult to obtain two identical feed sources, so that it is difficult to provide radio frequency signals with equal amplitude and in phase.
Referring to fig. 7D, the DM-wire antenna structure with coupled feeding in the fourth embodiment adopts a single-point feeding manner to feed to the exciter 42D, and performs coupled feeding on the radiator 41D through the exciter 42D, so as to reduce feeding difficulty and improve radiation efficiency and bandwidth potential of the radiator 41D.
Referring to fig. 4D, fig. 5D, fig. 6D and fig. 7D together, the radiator 41 may be formed as an antenna or a slot antenna, for example. Different exciters 42 may be respectively used to couple and feed the line antenna or the slot antenna, so as to excite multiple antenna modes on the line antenna or the slot antenna, for example: a CM line antenna mode of coupled feeding as shown in fig. 4D, a DM line antenna mode of coupled feeding as shown in fig. 5D, a CM slot antenna mode of coupled feeding as shown in fig. 6D, and a DM slot antenna mode of coupled feeding as shown in fig. 7D. It is understood that the radiator 41 may be a conductor having other shapes, such as an inverted F-shaped conductor, and the present application is not limited thereto.
In the present application, the different antenna structures shown in fig. 4A, fig. 5A, fig. 6A, and fig. 7A and the antenna structures in the prior art may be designed in a common body or in a combined manner, so as to form a high isolation antenna pair.
Please refer to FIG. 4C and FIG. 5D. As can be seen from the electric field distribution of the CM-line antenna pattern shown in fig. 4C, the CM-line antenna pattern exhibits vertical polarization; and as can be seen from the electric field distribution of the DM line antenna pattern shown in fig. 5D, the DM line antenna pattern exhibits horizontal polarization. And because the isolation between the vertically polarized antenna mode and the horizontally polarized antenna mode is good, the antenna structure of the CM wire antenna mode and the antenna structure of the DM wire antenna mode are designed in a common body, so that an orthogonal mode can be formed, and an antenna pair with high isolation is obtained.
Referring to fig. 8A, fig. 8A is a partially exploded view of a mobile terminal 100e applying a high isolation antenna pair provided in the present application in some embodiments. For example, the present application may implement a common design for the CM line antenna structure of the coupling feeding shown in fig. 4A and the DM line antenna structure of the coupling feeding shown in fig. 5A, resulting in the high isolation antenna pair shown in fig. 8A.
In the fifth embodiment, the mobile terminal 100e may include a case 2e, a radiator 51e, and a mover 52e, and the case 2e may be provided with a notch 21 e. The radiator 51e and the exciter 52e may be located at the side of the housing 2e and fixedly mounted to the housing 2 e. At least a portion of the structure of the radiator 51e may be located in the gap 21 e. The exciting body 52e may be located inside the radiator 51e with a gap from the radiator 51 e. The structure of the mobile terminal 100e and the connection relationship between the structures in the present embodiment may refer to the mobile terminal 100 as shown in fig. 3, and only differences will be described here.
Illustratively, the exciter 52e may include a CM mode exciter 5210e and a DM mode exciter 5220 e. Illustratively, the CM mode exciting body 5210e and the DM mode exciting body 5220e are disposed at intervals.
In the present embodiment, the CM mode exciting body 5210e and the DM mode exciting body 5220e may feed an electrical signal to the radiator 51e by coupling feeding from the middle of the radiator 51 e. The radiator 51e may form a line antenna. The wire antenna includes a first portion (not shown) and a second portion (not shown). The first portion is a portion from the middle of the radiator 51e to one end of the radiator 51e, and the second portion is a portion from the middle of the radiator 51e to the other end of the radiator 51 e. The structure of the line antenna and the connection relationship with other structures can refer to the radiator 41a in the first embodiment as shown in fig. 4A, and details thereof are not repeated.
The CM mode exciting body 5210e may include a planar conductor or a linear conductor. The planar conductor or the linear conductor may excite a first induced current in the first portion and a second induced current in the second portion by means of coupling feeding, and the directions of the first induced current and the second induced current are opposite to each other, so that an electric field and a magnetic field of the CM mode are excited in the radiator 51 e. The specific structure of the planar conductor and the position relationship and connection relationship with other structures can refer to the structure of the exciting body 42a in the first embodiment as shown in fig. 4A; the specific structure of the linear conductor and the position relationship and connection relationship between the linear conductor and other structures can refer to the structure of the excitation body 42a in the first embodiment shown in fig. 4A, and can be adaptively designed according to the first embodiment, which is not described herein again.
In this embodiment, a gap may exist between the DM mode exciting body 5220e and the radiator. The DM mode exciting body 5220e may comprise a ring conductor and a feed point 523e, and the feed point 523e may be equidistant from both ends of the ring conductor. The loop conductor may excite a fifth induced current in the first portion and a sixth induced current in the second portion by means of coupling feeding, and directions of the fifth induced current and the sixth induced current are the same, so that an electric field and a magnetic field of the DM mode are excited at the radiator 51 e. Specifically, the specific structure of the annular conductor and the position relationship and connection relationship between the annular conductor and other structures can refer to the structure of the excitation body 42b in the second embodiment as shown in fig. 5A, and the structure is adaptively designed according to the second embodiment, which is not described herein again.
Referring to fig. 8B, 8C and 8D together, fig. 8B is the CM mode antenna radiation pattern of the high isolation antenna pair shown in fig. 8A, fig. 8C is the DM mode antenna radiation pattern of the high isolation antenna pair shown in fig. 8A, and fig. 8D is the S-parameter graph of the high isolation antenna pair shown in fig. 8A. The S-parameters of the line antenna in CM mode, the S-parameters of the line antenna in DM mode, and the isolation of the high isolation antenna pair are shown in fig. 8D.
As shown in fig. 8B and 8C, the antenna radiation in the CM mode exhibits vertical polarization, and the antenna radiation in the DM mode exhibits horizontal polarization, so that the antenna pair shown in fig. 8A has a high isolation characteristic, so as to be suitable for the mioo antenna of the mobile terminal 100e and improve the transceiving performance of the mioo antenna.
Illustratively, the middle portion of the radiator 41e is equidistant from both ends of the radiator 41e, and the first portion and the second portion have the same length. In this embodiment, the radiator 41e may extend along a straight line, and the lengths of the first portion and the second portion are equal, so that the radiation field of the CM mode and the radiation field of the DM mode excited on the radiator 51e are symmetrically distributed, thereby increasing the orthogonality of the CM antenna mode and the DM antenna mode, and further improving the isolation of the high isolation antenna pair.
As shown in fig. 8D, the S-parameters of the CM mode line antenna are close to the S-parameters of the DM mode line antenna, indicating that the antenna performance of the CM mode line antenna matches that of the DM mode line antenna. And the isolation of the high isolation antenna pair is higher.
Referring to fig. 9A and 9B together, fig. 9A is a schematic structural diagram of a high isolation antenna pair provided in the present application in other embodiments, and fig. 9B is a partial structural diagram of the high isolation antenna pair shown in fig. 9A at another angle.
In other embodiments, the radiator 51e may form a line antenna. The CM mode driver 5210e of the high isolation antenna pair may drive a CM mode on the radiator 51e by direct feeding. The DM mode driver 5210e of the high isolation antenna pair can drive a DM mode on the radiator 51e by means of coupling feeding.
The CM mode driver 5210e may feed two equal-amplitude and in-phase rf signals to the first portion and the second portion of the radiator 51e by direct feeding. A first induced current is excited in the first portion and a second induced current is excited in the second portion, the directions of the first and second induced currents being opposite, so that an electric field and a magnetic field of the CM mode are excited on the radiator 51 e. In particular, the CM mode driver 5210e may include a feed line 5211e and a first feed point 5212 e. The feed line 5211e has one end connected to the radiator 51e and the other end connected to the first sidewall 211e of the notch 21 e. The first feed point 5212e is located at the other end of the feed line 5211e away from the radiator 51 e. The feed may feed an electrical signal from the first feed point 5212e to the radiator 51e through the feed line 5211e and excite an electric field and a magnetic field of the CM mode on the radiator 51 e.
In this embodiment, a gap may exist between the DM mode exciting body 5220e and the radiator. The DM mode exciting body 5220e may comprise a loop conductor 521e and a second feed point 523e, and the second feed point 523e may be equidistant from both ends of the loop conductor 521 e. The loop conductor 521e may excite a fifth induced current in the first portion and a sixth induced current in the second portion by means of coupling feeding, and directions of the fifth induced current and the sixth induced current are the same, so that an electric field and a magnetic field of the DM mode are excited in the radiator 51 e. Specifically, the specific structure of the annular conductor and the position relationship and connection relationship between the annular conductor and other structures can refer to the structure of the excitation body 42b in the second embodiment as shown in fig. 5A, and the structure is adaptively designed according to the second embodiment, which is not described herein again.
Referring to fig. 9C, fig. 9C is a graph of S-parameters of the high isolation antenna pair shown in fig. 9A; the S-parameters of the line antenna in CM mode, the S-parameters of the line antenna in DM mode, and the isolation of the high isolation antenna pair are shown in fig. 9C. The S-parameters of the CM mode line antenna are close to those of the DM mode line antenna, indicating that the antenna performance of the CM mode line antenna matches that of the DM mode line antenna. And the isolation of the high isolation antenna pair is higher.
Referring to fig. 9D, fig. 9D is a schematic structural diagram of a high isolation antenna pair according to still other embodiments of the present application. In other embodiments, the radiator 51e may form a line antenna. The CM mode driver 5210e of the high isolation antenna pair may also drive a CM mode on the radiator 51e by direct feeding.
In this embodiment, the CM mode exciting body 5120e of the high isolation antenna pair may refer to the coupling-fed CM mode exciting body 5120e shown in fig. 8A, and details thereof are not repeated herein. The DM mode driver 5220e of the high isolation antenna pair may also feed two equal-amplitude and opposite-phase rf signals to the first portion and the second portion of the radiator 51e by direct feeding, respectively, so as to generate a first induced current in the first portion and a second induced current in the second portion, where the first induced current and the second induced current have the same direction, thereby generating an electric field and a magnetic field in the DM mode on the radiator 51 e. In particular, the DM mode exciting body 5220e may further comprise a feed line and a feed point 523 e. One end of the feed line is connected to the radiator 51e, and the other end is connected to the feed point 523 e. The feed point 523e is located at the other end of the feed line from the radiator 51 e. The feed may feed electrical signals from the feed point 523e to the radiator 51e via the feed line, feeding the radiator 51e directly.
Referring to fig. 9E, fig. 9E is a schematic structural diagram of a high isolation antenna pair according to still other embodiments of the present application. In other embodiments, the radiator 51e of the high isolation antenna pair may also form a slot antenna, which is not limited in this application. The slot antenna may be formed by slotting the housing 2e with an opening at a first side of the slot, which may be located at an intermediate position of the first side. The slot antenna may also have no opening.
Illustratively, both ends of the radiator 51e may be connected to the case 2 e. The slot antenna may include a third section and a fourth section. The third portion is a portion from the middle of the radiator 51e to one end of the radiator 51e, and the fourth portion is a portion from the middle of the radiator 51e to the other end of the radiator 51 e.
The specific structure of the slot antenna, and the position relationship and the connection relationship between the slot antenna and other structures may refer to the structure of the radiator 41c in the third embodiment shown in fig. 6A, and are designed adaptively according to the third embodiment, which is not described herein again.
In the present embodiment, a gap exists between the CM mode exciting body 5220e and the radiator 51 e. The CM mode exciting body may employ a ring-shaped conductor. The loop conductor may also excite a third induced current in the third portion and a fourth induced current in the fourth portion by means of coupling feeding, and directions of the third induced current and the fourth induced current are the same, so that an electric field and a magnetic field of the CM mode are excited on the radiator 51 e. The specific structure of the annular conductor and the position relationship and connection relationship with other structures can refer to the structure of the exciting body 42c in the third embodiment as shown in fig. 6A, and are not described herein again according to the third embodiment.
In this embodiment, a gap may also exist between the DM mode exciter (not shown) and the radiator 51 e. The DM mode exciting body may include a planar conductor or a linear conductor. The planar conductor or the linear conductor may excite a fifth induced current in the third portion and a sixth induced current in the fourth portion by means of coupling feeding, and directions of the fifth induced current and the sixth induced current are opposite, so that an electric field and a magnetic field of the DM mode are excited in the radiator 51 e. The specific structure of the planar conductor and the position relationship and connection relationship with other structures can refer to the structure of the exciting body 42a in the first embodiment as shown in fig. 4A; the specific structure of the linear conductor and the position relationship and connection relationship with other structures can refer to the structure of the excitation body 42d in the fourth embodiment shown in fig. 7A, and the structure is adaptively designed according to the first embodiment and the fourth embodiment, which is not described herein again.
Referring to fig. 9F, fig. 9F is a schematic structural diagram of a high isolation antenna pair according to still other embodiments of the present application. In other embodiments, the radiator 51e of the high isolation antenna pair may also be a slot antenna, and the CM mode driver 5220e may feed two equal-amplitude and opposite rf signals to the first portion and the second portion of the radiator 51e by direct feeding, respectively, so as to generate a third induced current in the third portion and a fourth induced current in the fourth portion, where directions of the third induced current and the fourth induced current are the same, thereby driving an electric field and a magnetic field of the CM mode on the radiator 51 e. In particular, the CM mode excitation volume may include a feed line and a feed point. One end of the feed line is connected to the radiator 51e, and the other end is connected to the case 2 e. The first feed point is located at the other end of the feed line from the radiator 51 e. The feed may feed an electric signal from a first feed point to the radiator 51e through the feed line, and excite an electric field and a magnetic field of the CM mode on the radiator 51 e.
The DM mode driver 5210e may adopt a planar conductor or a linear conductor as shown in fig. 7A, and excite the DM mode on the radiator 51e by means of coupling feeding, which is not described herein again.
Referring to fig. 9G, fig. 9G is a schematic structural diagram of a high isolation antenna pair provided in the present application in some embodiments. In other embodiments, the radiator 51e of the high isolation antenna pair may also be a slot antenna, and in this embodiment, the DM mode driver 5210e may feed two equal-amplitude and in-phase rf signals to the first portion and the second portion of the radiator 51e by direct feeding, respectively, so as to generate a fifth induced current in the third portion and a sixth induced current in the fourth portion, where the directions of the fifth induced current and the sixth induced current are opposite, and thus generate an electric field and a magnetic field in the DM mode on the radiator 51 e. In particular, the DM mode exciting body 5210e may include a feeder line and a feeder point. One end of the feed line is connected with the radiator 51e, and the other end is connected with the first side wall of the gap. The first feed point is located at the other end of the feed line from the radiator 51 e. The feed may feed an electrical signal from a first feed point to the radiator 51e through the feed line, and excite an electric field and a magnetic field of the DM mode on the radiator 51 e.
In the present embodiment, a gap exists between the CM mode exciting body 5220e and the radiator 51 e. The CM mode exciting body may employ a ring-shaped conductor. The loop conductor may also excite a third induced current in the third portion and a fourth induced current in the fourth portion by means of coupling feeding, and directions of the third induced current and the fourth induced current are the same, so that an electric field and a magnetic field of the CM mode are excited on the radiator 51 e. The specific structure of the annular conductor and the position relationship and connection relationship with other structures can refer to the structure of the exciting body 42c in the third embodiment as shown in fig. 6A, and are not described herein again according to the third embodiment.
It is understood that the radiator 51e may also include a conductor having other shapes, such as an inverted F-shaped conductor, and the like, which is not limited in the present application. In this embodiment, the CM mode exciter and the DM mode exciter are adaptively adjusted according to the structural change of the radiator 51e, so as to excite the CM antenna mode and the DM antenna mode on the radiator 51 e.
Illustratively, the high isolation antenna pair may also include a first radiator 51e and a second radiator 51e (not shown) disposed at intervals. The first radiator 51e and the second radiator 51e may correspond to a CM mode exciting body and a DM mode exciting body, respectively. The structures of the CM mode exciter and the DM mode exciter need to be adaptively adjusted according to the structure of the radiator 51e, so that the CM mode exciter excites a CM mode on the first radiator 51e, and the DM mode exciter excites a DM mode on the second radiator 51 e.
In some embodiments, the first radiator 51e may form a line antenna, and the second radiator 51e may form a slot antenna.
The specific structure of the line antenna and the position relationship and connection relationship with other structures can refer to the structure of the radiator 41a in the first embodiment shown in fig. 4A, and are adaptively designed according to the first embodiment; the specific structure of the slot antenna, and the position relationship and the connection relationship between the slot antenna and other structures may refer to the structure of the radiator 41c in the third embodiment shown in fig. 6A, and are designed adaptively according to the third embodiment, which is not described herein again.
At this time, the CM mode exciter may excite a first induced current in the first portion and a second induced current in the second portion by means of direct power feeding, and directions of the first induced current and the second induced current are opposite, thereby exciting an electric field and a magnetic field of the CM mode on the radiator 51 e. In particular, the CM mode excitation volume may include a feed line and a first feed point. One end of the feed line is connected with the radiator 51e, and the other end is connected with the first side wall of the gap. The first feed point is located at the other end of the feed line from the radiator 51 e. The feed may feed an electric signal from a first feed point to the radiator 51e through the feed line, and excite an electric field and a magnetic field of the CM mode on the radiator 51 e.
In addition, a gap may exist between the CM mode exciting body (not shown) and the radiator 51 e. The CM mode exciting body may include a planar conductor or a linear conductor. The planar conductor or the linear conductor may excite a first induced current in the first portion and a second induced current in the second portion by means of coupling feeding, and the directions of the first induced current and the second induced current are opposite to each other, so that an electric field and a magnetic field of the CM mode are excited in the radiator 51 e. The specific structure of the planar conductor and the position relationship and connection relationship with other structures can refer to the structure of the exciting body 42a in the first embodiment as shown in fig. 4A; the specific structure of the linear conductor and the position relationship and connection relationship with other structures can refer to the structure of the excitation body 42d in the fourth embodiment shown in fig. 7A, and the structure is adaptively designed according to the first embodiment and the fourth embodiment, which is not described herein again.
At this time, the DM mode exciter (not shown) may excite a fifth induced current in the third portion and a sixth induced current in the fourth portion by means of direct feeding, and directions of the fifth induced current and the sixth induced current are opposite, so that an electric field and a magnetic field of the DM mode are excited on the radiator 51 e. In particular, the DM mode excitation body may include a feeder line and a feeder point. One end of the feed line is connected with the radiator 51e, and the other end is connected with the first side wall of the gap. The first feed point is located at the other end of the feed line from the radiator 51 e. The feed may feed an electrical signal from a first feed point to the radiator 51e through the feed line, and excite an electric field and a magnetic field of the DM mode on the radiator 51 e.
In addition, a gap may exist between the DM mode exciting body (not shown) and the radiator 51 e. The DM mode exciting body may include a planar conductor or a linear conductor. The planar conductor or the linear conductor may excite a fifth induced current in the third portion and a sixth induced current in the fourth portion by means of coupling feeding, and directions of the fifth induced current and the sixth induced current are opposite, so that an electric field and a magnetic field of the DM mode are excited in the radiator 51 e. The specific structure of the planar conductor and the position relationship and connection relationship with other structures can refer to the structure of the exciting body 42a in the first embodiment as shown in fig. 4A; the specific structure of the linear conductor and the position relationship and connection relationship with other structures can refer to the structure of the excitation body 42d in the fourth embodiment shown in fig. 7A, and the structure is adaptively designed according to the first embodiment and the fourth embodiment, which is not described herein again.
In other embodiments, the first radiator 51e may form a slot antenna and the second radiator 51e may form a line antenna. The specific structure of the line antenna and the position relationship and connection relationship with other structures can refer to the structure of the radiator 41a in the first embodiment shown in fig. 4A, and are adaptively designed according to the first embodiment; the specific structure of the slot antenna, and the position relationship and the connection relationship between the slot antenna and other structures may refer to the structure of the radiator 41c in the third embodiment shown in fig. 6A, and are designed adaptively according to the third embodiment, which is not described herein again.
At this time, the CM mode exciting body (not shown) may excite a third induced current in the third portion and a fourth induced current in the fourth portion by means of direct power feeding, and directions of the third induced current and the fourth induced current are the same, so that an electric field and a magnetic field of the CM mode are excited on the radiator 51 e. In particular, the CM mode excitation volume may include a feed line and a feed point. One end of the feed line is connected with the radiator 51e, and the other end is connected with the first side wall of the gap. The first feed point is located at the other end of the feed line from the radiator 51 e. The feed may feed an electric signal from a first feed point to the radiator 51e through the feed line, and excite an electric field and a magnetic field of the CM mode on the radiator 51 e.
In addition, a gap may exist between the CM mode exciting body (not shown) and the radiator 51 e. The CM mode exciting body may employ a ring-shaped conductor. The loop conductor may also excite a third induced current in the third portion and a fourth induced current in the fourth portion by means of coupling feeding, and directions of the third induced current and the fourth induced current are the same, so that an electric field and a magnetic field of the CM mode are excited on the radiator 51 e. The specific structure of the annular conductor and the position relationship and connection relationship with other structures can refer to the structure of the exciting body 42c in the third embodiment as shown in fig. 6A, and are not described herein again according to the third embodiment.
In this embodiment, the DM mode exciter (not shown) may excite a first induced current in the first portion and a second induced current in the second portion by means of direct power feeding, and directions of the first induced current and the second induced current are the same, so that an electric field and a magnetic field of the DM mode are excited on the radiator 51 e. Specifically, the DM mode excitation body may further include a feed line and a feed point (not shown). One end of the feed line is connected with the radiator 51e, and the other end is connected with the first side wall of the gap. The feed point is located at the other end of the feed line from the radiator 51 e. The feed may feed an electrical signal from a feed point to the radiator 51e through a feed line, directly feeding the radiator 51 e.
In addition, a gap may exist between the DM mode exciting body and the radiator 51 e. The DM mode exciter may comprise a ring conductor and a second feed point. The loop conductor may excite a fifth induced current in the first portion and a sixth induced current in the second portion by means of coupling feeding, and directions of the fifth induced current and the sixth induced current are the same, so that an electric field and a magnetic field of the DM mode are excited at the radiator 51 e. Specifically, the specific structure of the annular conductor and the position relationship and connection relationship between the annular conductor and other structures can refer to the structure of the excitation body 42b in the second embodiment as shown in fig. 5A, and the structure is adaptively designed according to the second embodiment, which is not described herein again.
Referring to fig. 10A, fig. 10A is a partial structural diagram of a mobile terminal 100f applying a DM line antenna structure for coupling feeding provided in the present application in some other embodiments.
In the sixth embodiment, the specific structure of the mobile terminal 100f can refer to the second embodiment, and only the differences will be described here.
Illustratively, the actuating body 42f may also include a capacitor 424 f. The capacitor 424f may be located between the annular conductor 421f and the first sidewall 211f of the notch 21f and connect the annular conductor 421f and the housing 2f to achieve the ground.
Illustratively, the capacitor 424f may be connected to the first segment 4211f of the ring conductor 421f, and may also be connected to the third segment 4213f of the ring conductor 421 f. In other embodiments, the number of the capacitors 424f may be two, and two capacitors 424f may be connected to the first segment 4211f of the ring conductor 421f and the third segment 4213f of the ring conductor 421f, respectively.
Referring to fig. 5A, 10A and 10B together, fig. 10B is a graph showing the antenna radiation efficiency of the antenna device 4B shown in fig. 5A and the antenna device 4B shown in fig. 10A. Wherein, the ordinate of fig. 10B is the antenna radiation efficiency in dB; the ordinate of fig. 10B is the antenna radiation frequency in GHz. The "no capacitance" curve in fig. 10B represents the trend of the antenna radiation efficiency of the antenna device 4B shown in fig. 5A with the radiation frequency of the antenna; the "capacitive" curve in fig. 10B represents the tendency of the antenna radiation efficiency of the antenna device 4f shown in fig. 10A with the radiation frequency of the antenna.
It is understood that the addition of the capacitor 424f between the annular conductor 421f and the housing 2 can increase the magnetic field strength of the alternating magnetic field generated by the annular conductor 421f, thereby increasing the intensity of the induced current excited by the exciting body 42f on the radiator 41f and further increasing the radiation efficiency of the radiator 41 f.
As can also be seen from fig. 10B, the antenna device 4B shown in fig. 5A and the antenna device 4f shown in fig. 10A both have high radiation efficiency in the frequency range of 2GHz to 3 GHz. Further, since the capacitance 424f is added between the loop conductor 421f and the case 2, the radiation efficiency of the antenna device 4f shown in fig. 10A is higher than that of the antenna device 4b shown in fig. 5A.
Illustratively, the value of the capacitor 424f may be less than or equal to 12pF, such as 1pF, 2pF, etc., which is not limited in this application.
Referring to fig. 11, fig. 11 is a partial structural diagram of a mobile terminal 100s applying a DM line antenna structure for coupling feeding provided in the present application in some embodiments.
In the seventh embodiment, the specific structure of the mobile terminal 100s can be referred to the second embodiment, and only differences will be explained here.
In this embodiment, the feed point 423s may be located at an end of the loop conductor 421s, that is, the feed point 423s may be located at an end of the first segment 4211s of the loop conductor 421s away from the second segment 4212s of the loop conductor 421s, or may be located at an end of the third segment 4213s of the loop conductor 421s away from the second segment 4212s of the loop conductor 421 s.
Referring to fig. 12, fig. 12 is a partial structural diagram of a mobile terminal 100h applying a DM-wire antenna structure for coupling feeding provided in the present application in further embodiments.
In the eighth embodiment, the specific structure of the mobile terminal 100h can refer to the second embodiment, and only the differences will be described here.
In this embodiment, the feed point 423h may be located at an end of the loop conductor 421 h. The actuating body 42h may also include a connector 425 h. The connection member 425h may be located between the annular conductor 421h and the first sidewall 211h of the notch 21h and connect the annular conductor 421h and the housing 2 h. The feeding point 423h and the connection member 425h may be respectively located at both ends of the loop conductor 421 h.
Illustratively, the feed point 423h may be located at an end of the first segment 4211h of the loop conductor 421h distal from the second segment 4212h of the loop conductor 421 h. The connection member 425h may be located between the third segment 4213h of the ring conductor 421h and the first sidewall 211h of the gap 21h and connect the third segment 4213h of the ring conductor 421h with the housing 2h to achieve grounding.
In other embodiments, the feed point 423h may be located at an end of the third segment 4213h of the ring conductor 421h away from the second segment 4212h of the ring conductor 421h, and the connector 425h may be located between the first segment 4211h of the ring conductor 421h and the first sidewall 211h of the gap 21h and connect the first segment 4211h of the ring conductor 421h with the housing 2h to achieve the ground.
Illustratively, the connection 425h may include a capacitor or an inductor, which is not limited in this application.
It is understood that the addition of the capacitance between the annular conductor 421h and the housing 2 can increase the magnetic field strength of the alternating magnetic field generated by the annular conductor 421h, thereby increasing the intensity of the induced current excited by the exciting body 42h on the radiator 41h and further increasing the radiation efficiency of the radiator 41 h.
Referring to fig. 13, fig. 13 is a partial structural diagram of a mobile terminal 100i applying a DM-wire antenna structure for coupling feeding provided in the present application in further embodiments.
In the ninth embodiment, the specific structure of the mobile terminal 100i can refer to the second embodiment, and only the differences will be described here.
In this embodiment, the feed point 423i may be located at an end of the loop conductor 421i, that is, the feed point 423i may be located at an end of the first segment 4211i of the loop conductor 421i away from the second segment 4212i of the loop conductor 421i, or may be located at an end of the third segment 4213i of the loop conductor 421i away from the second segment 4212i of the loop conductor 421 i.
Illustratively, the actuating body 42i may also include a capacitor 424 i. The capacitor 424i may be equidistant from both ends of the second segment 4212i of the ring conductor 421 i. It can be understood that the addition of the capacitor 424i to the loop conductor 421i can increase the magnetic field strength of the alternating magnetic field generated by the loop conductor 421i, thereby increasing the intensity of the induced current excited by the exciting body 42i on the radiator 41i and further increasing the radiation efficiency of the radiator 41 i.
Referring to fig. 14, fig. 14 is a partial structural diagram of a mobile terminal 100j in some embodiments, to which a DM line antenna structure for coupling feeding provided in the present application is applied.
In the tenth embodiment, the specific structure of the mobile terminal 100j may refer to the second embodiment, and only the differences will be described here.
Illustratively, the ring conductor 421j of the actuating body 42j may further include a fourth segment 4214j and a fifth segment 5215j parallel to the second segment 4212 j. One end of the fourth segment 4214j of the ring conductor 421j is connected to the third segment 4213j of the ring conductor 421j, and the other end is connected to the first sidewall 211j of the gap 21 j; one end of the fifth segment 4215j of the ring conductor 421j is connected to the first segment 4211j of the ring conductor 421j, and the other end is connected to the first sidewall 211j of the gap 21 j.
In this embodiment, the feed point 423j may be located at an end of the annular conductor 421j, and the excitation body 42j may further include a connection member 425 j. The connection member 425j may be located between the annular conductor 421j and the first sidewall 211j of the notch 21j and connect the annular conductor 421j with the housing 2 j. The feed point 423j and the connection 425j may be located at two ends of the loop conductor 421j, respectively.
Illustratively, the feed point 423j may be located at an end of the fourth segment 4214j of the ring conductor 421j distal from the third segment 4213j of the ring conductor 421 j. The connection member 425j may be located between the fifth segment 4215j of the ring conductor 421j and the first sidewall 211j of the gap 21j and connect the fifth segment 4215j of the ring conductor 421j with the housing 2j to achieve the ground.
In other embodiments, the feed point 423j may also be located at an end of the fifth segment 4215j of the ring conductor 421j away from the first segment 4211j of the ring conductor 421j, and the connector 425j may be located between the fifth segment 4215j of the ring conductor 421j and the first sidewall 211j of the gap 21j and connect the fifth segment 4215j of the ring conductor 421j with the housing 2j to achieve the ground.
Illustratively, the connecting member 425j may include a capacitor or an inductor, which is not limited in this application.
It can be understood that the capacitance between the annular conductor 421j and the housing 2 can increase the magnetic field strength of the alternating magnetic field generated by the annular conductor 421j, thereby increasing the intensity of the induced current excited by the exciting body 42j on the radiator 41j and further increasing the radiation efficiency of the radiator 41 j.
In the present application, the length of the loop conductor 421j is increased, thereby increasing the magnetic field strength of the alternating magnetic field generated by the exciting body 42j and further increasing the radiation efficiency of the radiator 41 j.
Referring to fig. 15, fig. 15 is a partial structural diagram of a mobile terminal 100q applying a DM-wire antenna structure for coupling feeding provided in the present application in other embodiments.
In the eleventh embodiment, the specific structure of the mobile terminal 100q may refer to the second embodiment, and only differences will be described here.
Illustratively, the loop conductor 421q of the driver 42q may further include a fourth segment 4214q and a fifth segment 5215q parallel to the second segment 4212 q. One end of the fourth segment 4214q of the ring conductor 421q is connected to the third segment 4213q of the ring conductor 421q, and the other end is connected to the first sidewall 211q of the gap 21 q; the fifth segment 4215q of the loop conductor 421q has one end connected to the first segment 4211q of the loop conductor 421q and the other end connected to the first sidewall 211q of the notch 21 q.
In this embodiment, the feed point 423q may be located at the end of the loop conductor 421q, and the excitation body 42q may further include a connection 425 q. The connection member 425q may be positioned between the annular conductor 421q and the first sidewall 211q of the notch 21q and connect the annular conductor 421q and the housing 2 q. The feed point 423q and the connection member 425q may be located at both ends of the loop conductor 421q, respectively.
In this embodiment, the feed point 423q may be located at an end of the fourth segment 4214q of the loop conductor 421q that is distal from the third segment 4213q of the loop conductor 421 q. The connection member 425q may be located between the fifth segment 4215q of the ring conductor 421q and the first sidewall 211q of the gap 21q and connect the fifth segment 4215q of the ring conductor 421q with the housing 2q to achieve grounding.
In other embodiments, the feed point 423q may also be located at an end of the fifth segment 4215q of the loop conductor 421q away from the first segment 4211q of the loop conductor 421q, and the connector 425q may be located between the fifth segment 4215q of the loop conductor 421q and the first sidewall 211q of the gap 21q and connect the fifth segment 4215q of the loop conductor 421q with the housing 2q to achieve grounding.
Illustratively, the connection 425q may include a capacitor or an inductor, which is not limited in this application.
Illustratively, the actuating body 42q may also include a capacitor 424 q. The capacitor 424q may be equidistant from both ends of the second segment 4212q of the loop conductor 421 q.
It is understood that the addition of the capacitance to the loop conductor 421q can increase the magnetic field strength of the alternating magnetic field generated by the loop conductor 421q, thereby increasing the intensity of the induced current excited by the exciting body 42q on the radiator 41q and further increasing the radiation efficiency of the radiator 41 q.
In the present application, the length of the loop conductor 421q is increased, thereby increasing the magnetic field strength of the alternating magnetic field generated by the exciting body 42q and further increasing the radiation efficiency of the radiator 41 q.
Referring to fig. 16, fig. 16 is a partial structural diagram of a mobile terminal 100n applying a DM-wire antenna structure for coupling feeding provided in the present application in some more embodiments.
In the twelfth embodiment, the specific structure of the mobile terminal 100n can refer to the second embodiment, and only the differences will be described here.
Illustratively, the ring conductor 421n of the driver 42n may further include a fourth segment 4214n and a fifth segment 5215n parallel to the second segment 4212 n. One end of the fourth segment 4214n of the ring conductor 421n is connected to the third segment 4213n of the ring conductor 421n, and the other end is connected to the first sidewall 211n of the gap 21 n; one end of the fifth segment 4215n of the ring conductor 421n is connected to the first segment 4211n of the ring conductor 421n, and the other end is connected to the first sidewall 211n of the gap 21 n.
In this embodiment, the feeding point 423n may be located at an end of the annular conductor 421n, and the exciting body 42n may further include a connecting member 425 n. The connection member 425n may be located between the annular conductor 421n and the first sidewall 211n of the notch 21n and connect the annular conductor 421n and the housing 2 n. The feed point 423n and the connection member 425n may be respectively located at two ends of the ring conductor 421 n.
In this embodiment, the feed point 423n may be located at an end of the fourth segment 4214n of the ring conductor 421n away from the third segment 4213n of the ring conductor 421 n. The exciter body 42n may further include a connector 425n, and the connector 425n may be located between the fifth segment 4215n of the ring conductor 421n and the first sidewall 211n of the gap 21n and connect the fifth segment 4215n of the ring conductor 421n with the housing 2n to achieve ground.
In other embodiments, the feed point 423n may be located at an end of the fifth segment 4215n of the ring conductor 421n away from the first segment 4211n of the ring conductor 421n, and the connector 425n may be located between the fifth segment 4215n of the ring conductor 421n and the first sidewall 211n of the gap 21n and connect the fifth segment 4215n of the ring conductor 421n with the housing 2n to achieve the ground.
For example, the connection member 425n may include a capacitor or an inductor, which is not limited in this application.
Illustratively, the actuating body 42n may also include a plurality of capacitors 424n, e.g., three. The plurality of capacitors 424n may be respectively located in the middle of the second segment 4212n of the ring conductor 421n and at both ends of the second segment 4212 n. Understandably, the portion of the ring conductor 421n between both ends of the second segment 4212n can be regarded as the middle of the second segment 4212 n. Specifically, the capacitor 424n may or may not be equidistant from both ends of the second segment 4212n of the ring conductor 421 n.
It is understood that the addition of the capacitance to the loop conductor 421n can increase the magnetic field strength of the alternating magnetic field generated by the loop conductor 421n, thereby increasing the intensity of the induced current excited by the exciting body 42n on the radiator 41n and further increasing the radiation efficiency of the radiator 41 n.
In the present application, the length of the loop conductor 421n is increased, thereby increasing the magnetic field strength of the alternating magnetic field generated by the exciting body 42n and further increasing the radiation efficiency of the radiator 41 n.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application; the embodiments and features of the embodiments of the present application may be combined with each other without conflict. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (22)

1. A mobile terminal, comprising:
the shell is made of conductive materials, a notch is formed in the side of the shell, and an opening of the notch is located on the outer surface of the shell;
the radiator is at least partially positioned in the notch and is fixedly arranged in the notch;
the exciting body is positioned on the inner side of the radiating body, a gap is reserved between the exciting body and the radiating body, the exciting body is fixedly arranged in the gap and comprises a feed point, and the exciting body is connected with the shell; and
the positive pole of the feed source is connected with the feed point of the excitation body, and the negative pole of the feed source is connected with the shell;
the feed source can feed an electric signal into the exciting body and the shell from the feed point, an alternating magnetic field or an alternating electric field is generated around the exciting body and the shell, and the radiating body can resonate and amplify the alternating magnetic field or the alternating electric field and generate induction current.
2. The mobile terminal of claim 1, wherein the exciter feeds an electrical signal into the radiator through a coupling feed from a middle portion of the radiator, and the radiator forms a line antenna, and gaps are formed between both ends of the line antenna and the housing.
3. The mobile terminal of claim 2, wherein the line antenna comprises a first portion and a second portion, the first portion is a portion from the middle of the radiator to one end of the radiator, the second portion is a portion from the middle of the radiator to the other end of the radiator, the exciter comprises a planar conductor or a linear conductor, the planar conductor or the linear conductor excites a first induced current in the first portion and a second induced current in the second portion by coupling feeding, and directions of the first induced current and the second induced current are opposite.
4. The mobile terminal according to claim 3, wherein the first portion and the second portion together form a radiating stub, the exciter further comprises a ring conductor, two ends of the ring conductor are connected to the housing, a gap exists between a middle portion of the ring conductor and the housing, the ring conductor excites a fifth induced current in the first portion and a sixth induced current in the second portion by means of coupling feeding, and directions of the fifth induced current and the sixth induced current are the same; or
The exciter excites a fifth induced current in the first part and excites a sixth induced current in the second part by means of direct feeding, and the directions of the fifth induced current and the sixth induced current are the same.
5. The mobile terminal of claim 2, wherein the line antenna comprises a first portion and a second portion, the first portion is a portion from the middle of the radiator to one end of the radiator, the second portion is a portion from the middle of the radiator to the other end of the radiator, the first portion and the second portion together form a radiating stub, the exciter comprises a loop conductor, two ends of the loop conductor are connected to the housing, a gap exists between the middle of the loop conductor and the housing, the loop conductor excites a first induced current in the first portion and a second induced current in the second portion by coupling feeding, and directions of the first induced current and the second induced current are the same.
6. The mobile terminal of claim 1, wherein the exciter feeds an electrical signal to the radiator by coupling feeding from a middle portion of the radiator, the radiator forms a slot antenna, the slot antenna is formed by slotting on the housing, two ends of the radiator are connected to the housing, the slot antenna includes a third portion and a fourth portion, the third portion is a portion from the middle portion of the radiator to one end of the radiator, and the fourth portion is a portion from the middle portion of the radiator to the other end of the radiator.
7. The mobile terminal of claim 6, wherein the exciter comprises a planar conductor or a linear conductor, and the planar conductor or the linear conductor excites a third induced current in the third portion and a fourth induced current in the fourth portion by means of coupled feeding, and directions of the third induced current and the fourth induced current are opposite.
8. The mobile terminal according to claim 7, wherein the exciter further comprises a ring conductor, two ends of the ring conductor are connected to the housing, a gap exists between a middle portion of the ring conductor and the housing, the ring conductor excites a fifth induced current in the third portion and a sixth induced current in the fourth portion by means of coupling feeding, and directions of the fifth induced current and the sixth induced current are the same; or
And the exciter excites a fifth induced current in the third part and excites a sixth induced current in the fourth part in a direct feeding mode, and the directions of the fifth induced current and the sixth induced current are the same.
9. The mobile terminal of claim 6, wherein the exciter is a ring conductor, two ends of the ring conductor are connected to the housing, a gap exists between a middle portion of the ring conductor and the housing, the ring conductor excites a third induced current in the third portion and a fourth induced current in the fourth portion by coupling feeding, and directions of the third induced current and the fourth induced current are the same.
10. The mobile terminal of claim 7, wherein the radiator further forms a line antenna, gaps are formed between both ends of the line antenna and the case, and the line antenna includes a first portion from a middle of the radiator to one end of the radiator and a second portion from the middle of the radiator to the other end of the radiator;
the planar conductor or the linear conductor excites a first induced current in the first part and a second induced current in the second part in a coupling feeding mode, and the directions of the first induced current and the second induced current are opposite; or
The exciter excites a fifth induced current in the first part and a sixth induced current in the second part by means of direct feeding, and the directions of the fifth induced current and the sixth induced current are opposite.
11. The mobile terminal of claim 9, wherein the radiator further forms a line antenna, gaps are formed between both ends of the line antenna and the case, and the line antenna includes a first portion from a middle of the radiator to one end of the radiator and a second portion from the middle of the radiator to the other end of the radiator;
the annular conductor excites a first induced current in the first part and excites a second induced current in the second part in a coupling feeding mode, and the directions of the first induced current and the second induced current are the same; or
The exciter excites a fifth induced current in the first part and excites a sixth induced current in the second part by means of direct feeding, and the directions of the fifth induced current and the sixth induced current are the same.
12. The mobile terminal of any of claims 5, 8, 9 or 11, wherein the feed point is equidistant from both ends of the loop conductor, the actuator further comprising a capacitor positioned between and connecting the loop conductor and the housing;
the capacitor is connected with the first section of the annular conductor or the third section of the annular conductor; or
The number of the capacitors is two, and the two capacitors are respectively connected with the first section of the annular conductor and the third section of the annular conductor.
13. A mobile terminal as claimed in any of claims 5, 8, 9 or 11, wherein the feed point is located at an end of the looped conductor.
14. The mobile terminal of claim 13, wherein the stimulating body further comprises a connector comprising a capacitor or an inductor, the connector being located between the ring conductor and the housing and connecting the ring conductor and the conductive portion;
the feed point and the connecting piece are respectively positioned at two ends of the annular conductor.
15. The mobile terminal of claim 13, wherein the excitation body further comprises a capacitance that is equidistant from both ends of the second segment of the looped conductor.
16. The mobile terminal of any of claims 5, 8, 9, or 11, wherein the loop conductor further comprises a fourth segment and a fifth segment parallel to the second segment of the loop conductor, wherein the fourth segment of the loop conductor has one end connected to the third segment of the loop conductor and the other end connected to the housing, the fifth segment of the loop conductor has one end connected to the first segment of the loop conductor and the other end connected to the housing, and the feed point is located at an end of the loop conductor.
17. The mobile terminal of claim 16, wherein the exciter further comprises a connector located at and connecting the loop conductor to the housing at an end of the loop conductor, the feed point and the connector being located at respective ends of the loop conductor.
18. The mobile terminal of claim 17, wherein the excitation body further comprises a capacitor located in a middle of the second segment of the loop conductor; or
The exciting body further comprises a plurality of capacitors, and the capacitors are respectively positioned in the middle of the second section of the annular conductor and at two ends of the second section of the annular conductor.
19. A high isolation antenna pair is applied to a mobile terminal and is characterized by comprising a radiator, a CM mode exciting body and a DM mode exciting body, wherein the CM mode exciting body and the DM mode exciting body are arranged at intervals;
the CM mode exciter and the DM mode exciter feed electrical signals into the radiator from the middle of the radiator in a coupling feed manner, and the radiator forms a line antenna, where the line antenna includes a first portion and a second portion, the first portion is a portion from the middle of the radiator to one end of the radiator, and the second portion is a portion from the middle of the radiator to the other end of the radiator;
the CM mode exciter excites a first induced current in the first part and excites a second induced current in the second part by means of direct feeding, and the directions of the first induced current and the second induced current are opposite; or
A gap exists between the CM mode excited body and the radiator, the CM mode excited body includes a planar conductor or a linear conductor, the planar conductor or the linear conductor excites a first induced current in the first portion and excites a second induced current in the second portion in a coupling feeding manner, and directions of the first induced current and the second induced current are opposite;
a gap exists between the DM mode driver and the radiator, the DM mode driver includes a loop conductor, the loop conductor drives a fifth induced current in the first portion and a sixth induced current in the second portion by coupling feeding, and directions of the fifth induced current and the sixth induced current are the same.
20. A high isolation antenna pair is applied to a mobile terminal and is characterized by comprising a radiator, a CM mode exciting body and a DM mode exciting body, wherein the CM mode exciting body and the DM mode exciting body are arranged at intervals;
the CM mode exciter and the DM mode exciter feed electrical signals into the radiator from the middle of the radiator in a coupling feed manner, and the radiator forms a line antenna, where the line antenna includes a first portion and a second portion, the first portion is a portion from the middle of the radiator to one end of the radiator, and the second portion is a portion from the middle of the radiator to the other end of the radiator;
a gap exists between the CM mode excited body and the radiator, the CM mode excited body includes a planar conductor or a linear conductor, the planar conductor or the linear conductor excites a first induced current in the first portion and excites a second induced current in the second portion in a coupling feeding manner, and directions of the first induced current and the second induced current are opposite;
the DM mode driver excites a fifth induced current in the first portion and a sixth induced current in the second portion by means of direct feeding, and directions of the fifth induced current and the sixth induced current are the same.
21. A high isolation antenna pair is applied to a mobile terminal, the mobile terminal comprises a shell, the shell is made of metal materials, and the high isolation antenna pair is characterized by comprising a radiator, a CM mode exciting body and a DM mode exciting body, wherein the CM mode exciting body and the DM mode exciting body are arranged at intervals;
feeding an electrical signal into the radiator from the middle of the radiator by coupling feeding through the CM mode exciter and the DM mode exciter, wherein the radiator forms a slot antenna, the slot antenna is formed by slotting on the housing, two ends of the radiator are connected with the housing, the slot antenna includes a third portion and a fourth portion, the third portion is a portion from the middle of the radiator to one end of the radiator, and the fourth portion is a portion from the middle of the radiator to the other end of the radiator;
a gap exists between the CM mode driver and the radiator, the CM mode driver adopts a ring conductor, the ring conductor drives a third induced current in the third portion and drives a fourth induced current in the fourth portion in a coupling feeding manner, and directions of the third induced current and the fourth induced current are the same;
the DM mode driver drives a fifth induced current in the third portion and a sixth induced current in the fourth portion by direct feeding, and directions of the fifth induced current and the sixth induced current are opposite; or
A gap exists between the DM mode driver and the radiator, the DM mode driver includes a planar conductor or a linear conductor, the planar conductor or the linear conductor drives a fifth induced current in the third portion and a sixth induced current in the fourth portion in a coupling feeding manner, and directions of the fifth induced current and the sixth induced current are opposite.
22. A high isolation antenna pair is applied to a mobile terminal, the mobile terminal comprises a shell, the shell is made of metal materials, and the high isolation antenna pair is characterized by comprising a radiator, a CM mode exciting body and a DM mode exciting body, wherein the CM mode exciting body and the DM mode exciting body are arranged at intervals;
feeding an electrical signal into the radiator from the middle of the radiator by coupling feeding through the CM mode exciter and the DM mode exciter, wherein the radiator forms a slot antenna, the slot antenna is formed by slotting on the housing, two ends of the radiator are connected with the housing, the slot antenna includes a third portion and a fourth portion, the third portion is a portion from the middle of the radiator to one end of the radiator, and the fourth portion is a portion from the middle of the radiator to the other end of the radiator;
the CM mode exciter excites a third induced current in the third part and excites a fourth induced current in the fourth part in a direct feeding mode, and the directions of the third induced current and the fourth induced current are the same;
a gap exists between the DM mode driver and the radiator, the DM mode driver includes a planar conductor or a linear conductor, the planar conductor or the linear conductor drives a fifth induced current in the third portion and a sixth induced current in the fourth portion in a coupling feeding manner, and directions of the fifth induced current and the sixth induced current are opposite.
CN202111101171.XA 2021-09-18 2021-09-18 Mobile terminal and high isolation antenna pair Active CN113839204B (en)

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