CN113839204B - Mobile terminal and high isolation antenna pair - Google Patents

Abstract

The application discloses a mobile terminal and a high-isolation antenna pair. The mobile terminal provided by this application includes a casing, a radiator, an excitation body and a feed source. Wherein, the shell is made of conductive material, and the side of the shell is provided with a gap. The radiator is at least partially located in the gap. The exciter is located inside the radiator, and there is a gap between the radiator and the radiator. The exciter includes a feed point and is connected to the casing. The positive pole of the feed source is connected to the feed point of the excitation body, and the negative pole of the feed source is connected to the housing; the feed source can feed electrical signals from the feed point into the excitation body and the housing, and generate an alternating magnetic field or alternating current around the excitation body and the housing. The variable electric field increases the strength of the alternating electric field or the alternating magnetic field to improve the radiation performance of the mobile terminal. In addition, the present application integrates the antenna structure of the CM line antenna mode and the antenna structure of the DM line antenna mode to obtain a high-isolation antenna pair.

Description

Mobile terminal and high isolation antenna pair

technical field

The present application relates to the field of mobile communication, in particular to a mobile terminal and a pair of high-isolation antennas.

Background technique

Existing antenna devices excite a CM (common mode, common mode) antenna mode and a DM (differential mode, differential mode) antenna mode by feeding a radiator of a specific shape (such as a wire antenna, a slot antenna). For example, the CM antenna mode can be excited on the wire antenna radiator by directly feeding the wire antenna radiator. In the prior art, two feed sources are generally used to provide radio frequency signals of equal amplitude and phase respectively, and the radio frequency signals of equal amplitude and phase are fed into the radiator of the wire antenna, so as to realize direct feeding. However, in the process of engineering implementation, due to differences in structures and materials, it is difficult to obtain two identical feed sources to provide radio frequency signals of equal amplitude and phase, resulting in reduced radiation efficiency and bandwidth potential of the antenna device.

Contents of the invention

The present application provides a mobile terminal and a high-isolation antenna pair. The mobile terminal provided by the present application includes an excitation source and a radiator, and the excitation source feeds a radiator of a specific shape (such as a wire antenna, a slot antenna) through coupling and feeding, and excites multiple antenna modes. The mobile terminal of the present application feeds the excitation source in a single-point feeding manner, and couples and feeds the radiator through the excitation source, which reduces the difficulty of feeding, and improves the radiation efficiency and bandwidth potential of the mobile terminal.

In one aspect, the present application provides a mobile terminal. The mobile terminal includes a casing, a radiator, an excitation body and a feed source. Wherein, the casing is made of conductive material, a notch is provided on the side of the casing, and the opening of the notch is located on the outer surface of the casing. The radiator is at least partially located in the notch and is fixedly installed in the notch. The exciter is located inside the radiator and there is a gap between it and the radiator, the exciter is fixedly installed in the gap, the exciter includes a feed point, and the exciter is connected to the casing. The positive pole of the feed source is connected to the feed point of the excitation body, and the negative pole of the feed source is connected to the housing; the feed source can feed electrical signals from the feed point into the excitation body and the housing, and generate an alternating magnetic field or alternating current around the excitation body and the housing. Alternating electric field, the radiator can resonate and amplify the alternating magnetic field or alternating electric field, and induce current.

In this implementation manner, 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 alternating magnetic field. An increase in the intensity of the alternating electric field or the alternating magnetic field can increase the intensity of the excited induced current, thereby increasing the intensity of the radio frequency signal radiated by the mobile terminal, and improving the radiation performance of the mobile terminal.

In a possible implementation manner, the exciter feeds electrical signals into the radiator from the middle of the radiator through coupling feeding, the radiator forms a wire antenna, and gaps are formed between both ends of the wire antenna and the casing.

In this implementation manner, the part between the two ends of the radiator can be regarded as the middle part of the radiator. The feed point of the exciter corresponds to the middle of the radiator. Exemplarily, the distance between the middle part of the radiator and the two ends of the radiator is equal to generate a symmetrically distributed radiation pattern and improve the radiation efficiency of the radiator, and the frequency of the first induced current and the second induced current are the same.

In a possible implementation manner, the wire antenna includes a first part and a second part, the first part is a part from the middle of the radiator to one end of the radiator, and the second part is a part from the middle of the radiator to the other end of the radiator, The exciter includes a planar conductor or a linear conductor, and the planar conductor or linear conductor excites the first induced current in the first part and the second induced current in the second part through coupling and feeding. The directions of the induced current and the second induced current are opposite.

In this implementation manner, the first part and the second part together constitute a radiation branch, and the planar conductor or linear conductor excites a CM wire antenna mode coupled and fed from the wire antenna.

In a possible implementation manner, the wire antenna includes a first part and a second part, the first part is a part from the middle of the radiator to one end of the radiator, and the second part is a part from the middle of the radiator to the other end of the radiator, The first part and the second part together constitute the radiation branch. The excitation body also includes a ring conductor. Both ends of the ring conductor are connected to the shell. There is a gap between the middle part of the ring conductor and the shell. Exciting a fifth induced current in the first part and a sixth induced current in the second part by electrical means, the directions of the fifth induced current and the sixth induced current are the same; or

The excitation body excites the fifth induced current in the first part and the sixth induced current in the second part through direct feeding, and the direction of the fifth induced current and the sixth induced current are the same.

In this implementation mode, the planar conductor or linear conductor excites the CM line antenna mode for coupling and feeding on the line antenna, and at the same time, the loop conductor excites the DM line antenna mode for coupling and feeding on the line antenna, forming a high-isolation antenna right.

In a possible implementation, the exciter includes a ring conductor, the two ends of the ring conductor are connected to the housing, there is a gap between the middle part of the ring conductor and the housing, and the ring conductor is connected to the The first induced current is excited in the first part, and the second induced current is excited in the second part, 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 mode on the wire antenna.

In a possible implementation, the exciter feeds electrical signals into the radiator from the middle of the radiator through coupling feeding, the radiator forms a slot antenna, and the slot antenna is formed by slotting the shell, and the two sides of the radiator The end is connected with the casing, and the slot antenna includes 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, the distance between the middle part of the radiator and the two ends of the radiator is equal to generate a symmetrically distributed radiation pattern and improve the radiation efficiency of the radiator, and the frequencies of the third induced current and the fourth induced current are the same.

In a possible implementation manner, the excitation body includes a planar conductor or a linear conductor, and the planar conductor or linear conductor excites the third induced current in the third part by means of coupling and feeding, and in the fourth part A fourth induced current is excited, and the directions of the third induced current and the fourth induced current are opposite.

In this implementation manner, the planar conductor or the linear conductor excites the coupled-feed DM slot antenna mode on the slot antenna.

In a possible implementation, the excitation body further includes a ring conductor, the two ends of the ring conductor are connected to the housing, there is a gap between the middle part of the ring conductor and the housing, and the ring conductor is fed through coupling Exciting a fifth induced current in the third part and exciting a sixth induced current in the fourth part, the directions of the fifth induced current and the sixth induced current being the same; or

The excitation body excites the fifth induced current in the third part and the sixth induced current in the fourth part through direct feeding, and the direction of the fifth induced current and the sixth induced current are the same.

In this implementation, the planar conductor or linear conductor excites the coupled-feed DM slot antenna mode on the slot antenna, while the loop conductor excites the coupled-feed CM slot antenna mode on the slot antenna, forming a high isolation pair of antennas.

In a possible implementation, the excitation body adopts a ring conductor, the two ends of the ring conductor are connected to the shell, there is a gap between the middle part of the ring conductor and the shell, and the ring conductor is connected to the The third induced current is excited in the third part, and the fourth induced current is excited in the fourth part, 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 mode on the slot antenna.

In a possible implementation manner, the radiator also forms a wire antenna, and gaps are formed between both ends of the wire antenna and the housing. The wire antenna includes a first part and a second part, and the first part is from the middle of the radiator to the center of the radiator. The part at one end, the second part is the part from the middle of the radiator to the other end of the radiator;

A planar conductor or a linear conductor excites a first induced current in the first part and a second induced current in the second part through coupling feeding, and the directions of the first induced current and the second induced current are opposite; or

The excitation body excites the fifth induced current in the first part and the sixth induced current in the second part through direct feeding, and the direction of the fifth induced current and the sixth induced current are opposite.

In this implementation, the planar conductor or linear conductor excites the coupled-feed DM slot antenna mode on the slot antenna, and at the same time, the planar conductor or linear conductor excites the coupled-feed CM line antenna mode on the line antenna, Form a high isolation antenna pair.

In a possible implementation manner, the radiator also forms a wire antenna, and gaps are formed between both ends of the wire antenna and the housing. The wire antenna includes a first part and a second part, and the first part is from the middle of the radiator to the center of the radiator. The part at one end, the second part is the part from the middle of the radiator to the other end of the radiator;

The loop 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; or

The excitation body excites the fifth induced current in the first part and the sixth induced current in the second part through direct feeding, and the direction of the fifth induced current and the sixth induced current are the same.

In this implementation, the loop conductor excites the coupled and fed CM slot antenna mode on the slot antenna, and at the same time the loop conductor excites the coupled and fed DM line antenna mode on the line antenna, forming a high-isolation antenna pair.

In a possible implementation manner, the distance between the feed point and both ends of the ring conductor is equal, and the excitation body further includes a capacitor, the capacitor is located between the ring conductor and the casing, and connects the ring conductor and the casing;

A capacitor is connected to the first segment of the ring conductor, or to the third segment of the ring conductor; or

There are two capacitors, and the two capacitors are respectively connected to the first section of the ring conductor and the third section of the ring conductor.

In this implementation, increasing the capacitance between the ring conductor and the housing can increase the magnetic field strength of the alternating magnetic field generated by the ring conductor, thereby increasing the intensity of the induced current excited by the excitation body on the radiator, and The radiation efficiency of the radiator is further increased.

In a possible implementation manner, the feed point is located at the end of the ring conductor.

In a possible implementation manner, the exciter further includes a connecting piece, the connecting piece includes a capacitor or an inductance, the connecting piece is located between the ring-shaped conductor and the housing, and connects the ring-shaped conductor and the conductive part; the feed point and the connecting piece are respectively located at both ends of the ring conductor.

In this implementation, adding capacitance or inductance between the ring conductor and the shell can increase the magnetic field strength of the alternating magnetic field generated by the ring conductor, thereby increasing the intensity of the induced current excited by the excitation body on the radiator , and further increases the radiation efficiency of the radiator.

In a possible implementation manner, the excitation body further includes a capacitor, and the distance between the capacitor and both ends of the second segment of the ring conductor is equal.

In this implementation, increasing the capacitance between the ring conductor and the housing can increase the magnetic field strength of the alternating magnetic field generated by the ring conductor, thereby increasing the intensity of the induced current excited by the excitation body on the radiator, and The radiation efficiency of the radiator is further increased.

In a possible implementation manner, the ring conductor further includes a fourth segment and a fifth segment parallel to the second segment of the ring conductor, wherein one end of the fourth segment of the ring conductor is connected to the third segment of the ring conductor , the other end is connected to the housing, one end of the fifth segment of the ring conductor is connected to the first segment of the ring conductor, and the other end is connected to the housing, and the feed point is located at the end of the ring conductor.

In this implementation manner, the length of the loop conductor is increased, thereby increasing the magnetic field strength of the alternating magnetic field generated by the excitation body, and further increasing the radiation efficiency of the radiator.

In a possible implementation manner, the exciter further includes a connector, which is located at the end of the ring conductor and the casing, and connects the ring conductor and the casing, and the feed point and the connector are respectively located at both ends of the ring conductor .

In a possible implementation manner, the excitation body further includes a capacitor, and the capacitor is located in the middle of the second segment of the ring conductor; or

The excitation body further includes a plurality of capacitors, and the plurality of capacitors are respectively located in the middle of the second section of the ring conductor and at both ends of the second section of the ring conductor.

On the other hand, the present application also provides a high-isolation antenna pair, which is applied to a mobile terminal. In this implementation manner, the CM line antenna mode exhibits vertical polarization, and the DM line antenna mode exhibits horizontal polarization. In addition, due to the good isolation between the vertically polarized antenna mode and the horizontally polarized antenna mode, the antenna structure of the CM line antenna mode and the antenna structure of the DM line antenna mode are integrated to form an orthogonal mode, thereby obtaining Highly isolated antenna pairs.

In a possible implementation, the high-isolation antenna pair includes a radiator, a CM mode exciter, and a DM mode exciter, and the interval between the CM mode exciter and the DM mode exciter is set;

The CM mode exciter and the DM mode exciter feed the electrical signal into the radiator from the middle of the radiator through coupling feeding. The radiator forms a wire antenna. The wire antenna includes a first part and a second part. The first part is the radiator. The part from the middle part to one end of the radiator, and the second part is the part from the middle part of the radiator to the other end of the radiator;

The CM mode exciter excites the first induced current in the first part and the second induced current in the second part through direct feeding, and the directions of the first induced current and the second induced current are opposite; or

There is a gap between the CM mode excitation body and the radiator, the CM mode excitation body includes a planar conductor or a linear conductor, and the planar conductor or linear conductor excites the first induced current in the first part by means of coupling feeding, and A second induced current is excited in the second part, and the directions of the first induced current and the second induced current are opposite;

There is a gap between the DM mode exciter and the radiator, and the DM mode exciter includes a ring conductor, and the ring conductor excites the fifth induced current in the first part and the second part in the second part by means of coupling feeding. Sixth induction current, the direction of the fifth induction current and the sixth induction current are the same.

In this implementation mode, the planar conductor or linear conductor excites the CM line antenna mode for coupling and feeding on the line antenna, and at the same time, the loop conductor excites the DM line antenna mode for coupling and feeding on the line antenna, forming a high-isolation antenna right.

In a possible implementation, the high-isolation antenna pair includes a radiator, a CM mode exciter, and a DM mode exciter, and the interval between the CM mode exciter and the DM mode exciter is set;

The CM mode exciter and the DM mode exciter feed the electrical signal into the radiator from the middle of the radiator through coupling feeding. The radiator forms a wire antenna. The wire antenna includes a first part and a second part. The first part is the radiator. The part from the middle part to one end of the radiator, and the second part is the part from the middle part of the radiator to the other end of the radiator;

There is a gap between the CM mode excitation body and the radiator, the CM mode excitation body includes a planar conductor or a linear conductor, and the planar conductor or linear conductor excites the first induced current in the first part by means of coupling feeding, and A second induced current is excited in the second part, and the directions of the first induced current and the second induced current are opposite;

The DM mode exciter excites the fifth induced current in the first part and the sixth induced current in the second part through direct feeding, and the direction of the fifth induced current and the sixth induced current are the same.

In this implementation, the planar conductor or linear conductor excites the CM line antenna mode coupled and fed to the line antenna, and at the same time, the exciter excites the DM line antenna mode on the line antenna to form a high-isolation antenna pair.

In a possible implementation, the high-isolation antenna pair includes a radiator, a CM mode exciter, and a DM mode exciter, and the interval between the CM mode exciter and the DM mode exciter is set;

The CM mode exciter and the DM mode exciter feed the electrical signal into the radiator from the middle of the radiator through coupling feeding. The radiator forms a slot antenna, and the slot antenna is formed by slotting on the shell. The two ends of the radiator Connected to the casing, the slot antenna includes 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;

There is a gap between the CM mode exciter and the radiator, and the CM mode exciter adopts a ring conductor, and the ring conductor excites the third induced current in the third part by means of coupling feeding, and excites the third induced current in the fourth part. The fourth induced current, the direction of the third induced current and the fourth induced current are the same;

The DM mode exciter excites the fifth induced current in the third part and excites the sixth induced current in the fourth part through direct feeding, and the direction of the fifth induced current and the sixth induced current are opposite; or

There is a gap between the DM mode excitation body and the radiator, and the DM mode excitation body includes a planar conductor or a linear conductor, and the planar conductor or linear conductor excites the fifth induced current in the third part by means of coupling feeding, In addition, a sixth induced current is excited in the fourth part, and directions of the fifth induced current and the sixth induced current are opposite.

In this implementation, the planar conductor or linear conductor excites the coupled-feed DM slot antenna mode on the slot antenna, while the loop conductor excites the coupled-feed CM slot antenna mode on the slot antenna, forming a high isolation pair of antennas.

In a possible implementation, the high-isolation antenna pair includes a radiator, a CM mode exciter, and a DM mode exciter, and the interval between the CM mode exciter and the DM mode exciter is set;

The CM mode exciter and the DM mode exciter feed the electrical signal into the radiator from the middle of the radiator through coupling feeding. The radiator forms a slot antenna, and the slot antenna is formed by slotting on the shell. The two ends of the radiator Connected to the casing, the slot antenna includes 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 a fourth induced current in the fourth part through direct feeding, and the directions of the third induced current and the fourth induced current are the same;

There is a gap between the DM mode excitation body and the radiator, and the DM mode excitation body includes a planar conductor or a linear conductor, and the planar conductor or linear conductor excites the fifth induced current in the third part by means of coupling feeding, In addition, a sixth induced current is excited in the fourth part, and directions of the fifth induced current and the sixth induced current are opposite.

In this implementation, the exciter excites the DM slot antenna mode on the slot antenna, and at the same time, the loop conductor excites the coupled and fed CM slot antenna mode on the slot antenna, forming a high-isolation antenna pair.

Description of drawings

FIG. 1 is a schematic structural diagram of a mobile terminal provided by the present application in some embodiments;

FIG. 2 is a schematic diagram of an exploded structure of a mobile terminal provided by the present application;

Fig. 3 is a schematic structural view of the housing shown in Fig. 2 in some embodiments;

FIG. 4A is a schematic diagram of partial structural decomposition of a mobile terminal applying a coupled-feed wire antenna structure provided in the present application. The coupled-feed wire antenna structure shown in FIG. 4A generates a wire antenna CM mode;

FIG. 4B is a schematic diagram of current distribution of a partial structure of the mobile terminal shown in FIG. 4A;

FIG. 4C is a schematic diagram of electric field distribution in the partial structure of the mobile terminal shown in FIG. 4A;

FIG. 4D is a schematic diagram of the magnetic field distribution in the partial structure of the mobile terminal shown in FIG. 4A;

FIG. 4E is a schematic diagram of current distribution in a direct-fed CM wire antenna structure in the prior art;

FIG. 5A is a schematic diagram of partial structural decomposition of a mobile terminal applying a coupled-feed wire antenna structure provided in the present application. The coupled-feed wire antenna structure shown in FIG. 5A generates a wire antenna DM mode;

FIG. 5B is a schematic diagram of current distribution of a partial structure of the mobile terminal shown in FIG. 5A;

FIG. 5C is a schematic diagram of the electric field distribution in the partial structure of the mobile terminal shown in FIG. 5A;

FIG. 5D is a schematic diagram of the magnetic field distribution in the partial structure of the mobile terminal shown in FIG. 5A;

FIG. 5E is a schematic diagram of current distribution in a direct-fed DM wire antenna structure in the prior art;

FIG. 6A is a schematic diagram of partial structural decomposition of a mobile terminal applying a coupled-feed slot antenna structure provided by the present application. The coupled-feed slot antenna structure shown in FIG. 6A generates a slot antenna CM mode;

FIG. 6B is a schematic diagram of current distribution of a partial structure of the mobile terminal shown in FIG. 6A;

FIG. 6C is a schematic diagram of the electric field distribution in the partial structure of the mobile terminal shown in FIG. 6A;

FIG. 6D is a schematic diagram of the magnetic field distribution in the partial structure of the mobile terminal shown in FIG. 6A;

FIG. 6E is a schematic diagram of current distribution in a direct-fed CM slot antenna structure in the prior art;

FIG. 7A is a schematic exploded view of a partial structure of a mobile terminal applying a coupled-feed slot antenna structure provided in the present application. The coupled-feed slot antenna structure shown in FIG. 7A generates a slot antenna DM mode;

FIG. 7B is a schematic diagram of current distribution of a partial structure of the mobile terminal shown in FIG. 7A;

FIG. 7C is a schematic diagram of electric field distribution in the partial structure of the mobile terminal shown in FIG. 7A;

FIG. 7D is a schematic diagram of the magnetic field distribution in the partial structure of the mobile terminal shown in FIG. 7A;

FIG. 7E is a schematic diagram of current distribution in a direct-fed DM slot antenna structure in the prior art;

Fig. 8A is a schematic diagram of partial structural decomposition of a mobile terminal applying a high-isolation antenna pair provided by the present application in some embodiments;

Fig. 8B is the antenna radiation pattern diagram of the CM mode of the high isolation antenna pair shown in Fig. 8A;

FIG. 8C is an antenna radiation pattern diagram of the DM mode of the high-isolation antenna pair shown in FIG. 8A;

Figure 8D is an S-parameter diagram of the high isolation antenna pair shown in Figure 8A;

FIG. 9A is a schematic structural diagram of a high-isolation antenna pair provided by the present application in other embodiments;

FIG. 9B is a partial structural schematic view of the high-isolation antenna pair shown in FIG. 9A at another angle;

Fig. 9C is an S-parameter diagram of the high isolation antenna pair shown in Fig. 9A;

Fig. 9D is a schematic structural diagram of the high-isolation antenna pair provided by the present application in some other embodiments;

FIG. 9E is a schematic structural diagram of the high-isolation antenna pair provided by the present application in some other embodiments;

FIG. 9F is a schematic structural diagram of the high-isolation antenna pair provided by the present application in some other embodiments;

FIG. 9G is a schematic structural diagram of the high-isolation antenna pair provided by the present application in some more embodiments;

Fig. 10A is a partial structural diagram of a mobile terminal applying a coupling-feeding DM wire antenna structure provided in this application in some other embodiments;

Fig. 10B is an antenna radiation efficiency diagram 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 coupling-feeding DM wire antenna structure provided by the present application in some other embodiments;

Fig. 12 is a partial structural diagram of a mobile terminal applying a coupling-feeding DM wire antenna structure provided by the present application in some other embodiments;

Fig. 13 is a partial structural diagram of a mobile terminal applying a coupling-feeding DM wire antenna structure provided by the present application in some other embodiments;

Fig. 14 is a partial structural schematic diagram of a mobile terminal applying a coupling-feeding DM wire antenna structure provided by the present application in more embodiments;

Fig. 15 is a partial structural diagram of a mobile terminal applying a coupling-feeding DM wire antenna structure provided by the present application in other embodiments;

Fig. 16 is a partial structural diagram of a mobile terminal applying a coupling-feeding DM wire antenna structure provided by the present application in some more embodiments.

Detailed ways

Embodiments of the present application are described below with reference to the drawings in the embodiments of the present application. Among them, the "and/or" in this article is only a kind of association relationship describing the association object, which means that there can be three kinds of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and A and B exist alone. There are three cases of B. In addition, in the description of the embodiments of the present application, unless otherwise specified, "plurality" refers to two or more than two. "Above" includes the original number, for example, more than two includes two.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a mobile terminal 100 provided in this application in some embodiments. Exemplarily, the mobile terminal 100 may be electronic products such as a mobile phone, a tablet, a notebook computer, a wearable device, a point of sales terminal (point of sales terminal, POS machine for short), and a vehicle-mounted computer. The embodiment of the present application is described by taking the mobile terminal 100 as a mobile phone as an example.

Exemplarily, the mobile terminal 100 may use a communication technology to implement the communication function, for example: Bluetooth (bluetooth, BT) communication technology, global positioning system (global positioning system, GPS) communication technology, wireless fidelity (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 and other communication technologies in the future. Exemplarily, the mobile terminal 100 may adopt one communication technology, or may adopt multiple communication technologies, which is not limited in this application.

Exemplarily, the mobile terminal 100 may include a display screen 1 , a casing 2 and a rear cover 3 . Wherein, the display screen 1 and the rear cover 3 can be fixedly installed on both sides of the casing 2 opposite to each other.

Exemplarily, the casing 2 may be made of conductive materials such as metal. In the present application, the case 2 can be used as a ground plate for electronic components. The electronic components in the mobile terminal 100 can be electrically connected to the casing 2 to achieve grounding, so as to avoid problems such as electric leakage of the electronic components and damage caused by high current impact. In some other embodiments, the shell 2 may also use a composite material of metal and plastic to reduce the weight of the shell 2 while ensuring the grounding performance, which is not limited in the present application.

Exemplarily, the rear cover 3 is used to protect the internal structure of the mobile terminal 100 . The back cover 3 can be made of metal materials, or materials such as glass, ceramics, and plastics.

Please refer to FIG. 1 and FIG. 2 together. FIG. 2 is a schematic diagram of an exploded structure of the mobile terminal 100 provided in this application.

Exemplarily, the casing 2 may include a frame 20 . The frame 20 is arranged around the casing 2 , and the display screen 1 and the rear cover 3 can be fixedly connected with the frame 20 . The bezel 20 may constitute a side of the mobile terminal 100 . The frame 20 can be made of metal material, and at this time, the frame 20 is suitable for the metal ID (industrial design, industrial design) of the mobile terminal 100;

Exemplarily, the mobile terminal 100 may further include an antenna device 4 for implementing a communication function. The antenna device 4 can be disposed on a side of the casing 2 . The mobile terminal 100 can transmit communication signals through the antenna device 4 to realize communication functions.

Exemplarily, the mobile terminal 100 may further include a circuit board (not shown). The circuit board can be an FR-4 dielectric board or a Rogers (Rogers) dielectric board, or a mixed media board including the Rogers dielectric board and the FR-4 dielectric board. Among them, FR-4 is a flame-resistant material, and Rogers dielectric board is a high-frequency board. Exemplarily, the circuit board can be installed in the inner cavity of the mobile terminal 100 to carry electronic components in the mobile terminal 100 and transmit signals. The circuit board may include a metal layer, and the electronic components may also be electrically connected to the metal layer to achieve grounding. In this application, the metal layer of the circuit board can also be used as a ground plane for electronic components.

Exemplarily, the antenna device 4 may be electrically connected to a circuit board, and transmit electrical signals through the circuit board. The antenna device 4 can also be grounded through the circuit board to reduce the noise of the radio frequency signal and improve the transmission quality of the signal. In some 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 the present application.

Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of some embodiments of the casing 2 shown in FIG. 2 .

Exemplarily, the antenna device 4 may include a radiator 41 and an excitation body 42 . The radiator 41 and the excitation body 42 can be located on the side of the casing 2 and fixedly installed on the casing 2 . Specifically, the casing 2 may be provided with a notch 21 . The opening of the notch 21 is located on the outer surface 20 of the casing 2 , and the notch 21 extends from the opening to a direction away from the outer surface 20 . At least part of the structure of the radiator 41 may be located in the gap 21 . The excitation body 42 may be located inside the radiator 41 and there is a gap 43 between the radiator 41 and the radiator 41 . Understandably, the inner side of the radiator 41 is the side of the radiator 41 facing away from the outside of the mobile terminal 100 .

Exemplarily, the casing 2 may include the casing 2, and the excitation body 42 may be connected to the casing 2 to realize grounding. The casing 2 can be made of conductive materials such as metal.

Exemplarily, the housing 2 may further include a dielectric 22 . The dielectric 22 fills the gap 21 together with the radiator 41 and the excitation body 42 . In the present application, the outer surface of the structure included in the mobile terminal 100 is the surface of the structure in contact with the exterior of the mobile terminal 100 . For example, the outer surface 20 of the housing 2 is the surface where the housing 2 is in contact with the exterior of the mobile terminal 100; the outer surface 410 of the radiator 41 is the surface where the radiator 41 is in contact with the exterior of the mobile terminal 100; the outer surface of the dielectric 22 is The dielectric 22 is a surface in contact with the exterior of the mobile terminal 100 .

Exemplarily, both ends of the radiator 41 may be fixedly connected to the casing 2 , or there may be a gap between the two ends of the radiator 41 and the casing 2 and fixedly installed in the notch 21 through the dielectric 22 . In the present application, the notch 21 is surrounded by the second side wall 212, the first side wall 211 and the third side wall 213 connected in sequence, the first side wall 211 of the notch 21 faces the opening of the notch 21, and the second side wall of the notch 21 The side wall 212 is opposite to the third side wall 213 of the notch 21 .

Exemplarily, both ends of the radiator 41 can be fixedly connected to the second side wall 212 and the third side wall 213 of the notch 21, and the two ends of the radiator 41 can also be connected to the second side wall 212 and the third side wall of the notch 21. There are gaps between the walls 213 and are fixedly installed in the notch 21 through the dielectric 22 .

Exemplarily, the excitation body 42 may be made of conductive materials, such as metal, conductive rubber, conductive plastic, and the like. The actuator 42 can be used to receive electrical signals from other devices of the mobile terminal 100, such as a central processing unit (central processing unit, CPU) and the like.

Exemplarily, the radiator 41 may use conductive materials, such as metal, conductive rubber, conductive plastic, and the like.

In this embodiment, the exciter 42 can be used as a feeding branch of the antenna, and feed the radio frequency signal into the radiator 41 in the form of coupling feeding. The radiator 41 can be used as the body structure of the antenna to radiate the radio frequency signal coupled by the excitation body 42 .

In this embodiment, the outer surface 410 of the radiator 41 and the outer surface of the dielectric 22 can transition smoothly, 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 moving The side of the appearance of the terminal 100 satisfies the ID design of the mobile terminal 100 to ensure the aesthetics of the mobile terminal 100 and the user's grip feeling.

In the present application, the radiator 41 is disposed on the side of the housing 2 to avoid being affected by other working components of the mobile terminal 100 and reduce signal noise. In addition, the outer surface 410 of the radiator 41 constitutes 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, and can avoid being blocked by other structures, thereby improving the performance of transmitting and receiving radio frequency signals. In some other embodiments, the radiator 41 may also be located in the inner cavity of the mobile terminal 100, which is not limited in this application.

Exemplarily, the value of the gap 43 between the excitation body 42 and the radiator 41 can be less than 2mm, such as 1mm, 0.1mm, 0.05mm, etc., to ensure a certain coupling between the excitation body 42 and the radiator 41, so that The radiator 41 is fed. It can be understood that the smaller the gap 43 is, the stronger the coupling between the excitation body 42 and the radiator 41 is. In addition, the antenna device 4 provided by the present application is small in size and occupies a small volume of the housing 2 , which is beneficial to the miniaturization of the mobile terminal 100 .

The present application provides various design solutions of the antenna device 4 , and the various design solutions of the antenna device 4 will be introduced in detail below.

Please refer to FIG. 4A. FIG. 4A is an exploded schematic diagram of a partial structure of a mobile terminal 100a using a coupled-feed wire antenna structure provided in the present application. The coupled-feed wire antenna structure shown in FIG. 4A generates a wire antenna CM mode.

In the first embodiment, the mobile terminal 100a may include a casing 2a, a radiator 41a and an excitation body 42a, and the casing 2 may be provided with a notch 21a. The radiator 41a and the excitation body 42a may be located on the side of the housing 2a and fixedly mounted on the housing 2a. At least part of the structure of the radiator 41a may be located in the gap 21a. The excitation body 42a may be located inside the radiator 41a, and there is a gap 43a between the radiator 41a and the radiator 41a. The housing 2a may also include a dielectric 22a. The dielectric 22a together with the radiator 41a and the excitation body 42a fills the gap 21a. For the structure of the mobile terminal 100a in this embodiment and the connection relationship between the structures, reference may be made to the mobile terminal 100 shown in FIG. 3 , and only the differences will be described here.

In this embodiment, gaps are formed between both ends of the radiator 41a and the casing 2a. The radiator 41a may form a wire antenna. Exemplarily, the radio frequency signal may be radiated out through the outer surface 410a of the radiator 41a. The outer surface 410a of the radiator 41a may be a curved surface, so as to conform to the design of the metal ID, and ensure the aesthetics and gripping feel of the mobile terminal 100a.

In this embodiment, the excitation body 42a may be made of conductive material, so as to generate a uniform alternating electric field around the excitation body 42a.

Exemplarily, the excitation body 42a may include a planar conductor 421a. Understandably, a planar conductor is a planar conductor. Specifically, the surface of the planar conductor 421a opposite to the outer surface 410a of the radiator 41a is a plane. In some other embodiments, the planar conductor 421a may also adopt a curved surface structure, 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 the present application.

In some other embodiments, the excitation conductor 421a may also be a linear conductor (not shown). Understandably, the linear conductor is a strip-shaped conductor.

Exemplarily, the excitation body 42a may further include a connecting wire 422a. One end of the connection wire 422a is connected to the planar conductor 421a, and the other end is connected to the first side wall 211a of the notch 21a, that is, connected to the housing 2a, so as to realize grounding. In the present application, the first side wall 211 a of the notch 21 a is a side wall of the notch 21 a facing the outer surface 20 a of the housing 2 . Exemplarily, the casing 2a can be made of conductive materials such as metal, and the connection wire 422a is connected to the casing 2a to be grounded, so as to prevent the clutter in the external environment of the excitation body 42a from interfering with the electrical signal propagating on the excitation body 42a, and reduce the electric current. The noise in the signal improves the transmission quality of the electrical signal.

Exemplarily, the connection line 422a may be connected to the side of the planar conductor 421a, and the connection line 422a may also be connected to the central region of the planar conductor 421a.

Exemplarily, the connecting line 422a may adopt a radio frequency transmission line such as a microstrip line and a coaxial line, so as to improve the transmission efficiency of the electrical signal, avoid interference from the external environment, and reduce noise in the electrical signal. In some other embodiments, the connection line 422a may also adopt a structure such as a metal sheet or a metal wire, which is not limited in this application. Exemplarily, the excitation body 42a may have a feed point 423a. The feed point 423a may be located at the other end of the connection line 422a away from the planar conductor 421a.

In some other embodiments, the excitation body 42a may not include the connecting wire 422a. In this case, the feed point 423a may be located in the middle of the planar conductor 421a, or in another area deviated from the middle of the planar conductor 421a.

Exemplarily, the mobile terminal 100a may further include a feed source (not shown in the figure). The feed source is connected to the feed point 423a for providing electrical signals, and feeds the electrical signals into the excitation body 42a through the feed point 423a.

Please refer to FIG. 4B . FIG. 4B is a schematic diagram of current distribution of a part of the structure of the mobile terminal 100 a shown in FIG. 4A . Among them, the size of the arrow represents the strength of the current, and the arrow from large to small represents the current from strong to weak.

Exemplarily, the exciter 42a feeds electrical signals into the radiator 41a from the middle of the radiator 41a through coupling and feeding. The part between the two ends of the radiator 41a can be regarded as the middle part of the radiator 41a. The feeding point 423a of the excitation body 42a corresponds to the middle of the radiator 41a.

Exemplarily, the radiator 41a may form a wire antenna, and the wire antenna may include a first part 411a and a second part 412a. The first part 411a is a part from the middle of the radiator 41a to one end of the radiator 41a, and the second part 412a is a part from the middle of the radiator 41a to the other end of the radiator 41a.

In the first embodiment, the exciter 42a feeds the radiator 41a through electric field coupling. This coupling feed can replace the equal-amplitude and in-phase CM feed to transmit electrical signals to the radiator 41a. The generated antenna pattern is also the line antenna CM pattern. The positive pole of the feed source can be connected to the feed point 423a, and the negative pole of the feed source can be connected to the housing 2 for grounding. The current flows from the feeding point 423a to the excitation body 42a, so that an alternating electric field (not shown) is generated around the excitation body 42a. The alternating electric field provides excitation signals of equal amplitude and phase to the first part 411a and the second part 412a of the radiator 41a respectively. The first part 411a and the second part 412a respectively generate a first induced current and a second induced current under the action of an excitation signal of equal amplitude and phase, and the directions of the first induced current and the second induced current are opposite. At this time, the working mode of the radiator 41a is the CM mode of the wire antenna, and the structure of the antenna device 4a in the first embodiment is a coupled excitation CM wire antenna structure.

Exemplarily, the distance between the middle part of the radiator 41a and the two ends of the radiator 41a is equal, and at this time, the lengths of the first part 411a and the second part 412a are equal. In this embodiment, the radiator 41a may extend along a straight line, and the length of the first part 411a and the second part 412a are equal to generate a symmetrically distributed radiation pattern and improve the radiation efficiency of the radiator 41a, and the first induced current and The frequency of the second induced current is the same. In some other embodiments, the radiator 41a may also extend along a curve.

In this application, the current distribution shown in FIG. 4B is the current distribution of the CM wire antenna mode. The first part 411a and the second part 412a of the radiator 41a together constitute a radiation branch.

Please refer to FIG. 4C and FIG. 4D together. FIG. 4C is a schematic diagram of the electric field distribution in the partial structure of the mobile terminal 100a shown in FIG. 4A, and FIG. 4D is a schematic diagram of the magnetic field distribution in the partial structure of the mobile terminal 100a shown in FIG. 4A. Wherein, the direction of the dotted arrow in FIG. 4C represents the direction of the electric field, and the density of the dotted arrow represents the strength of the electric field. The graphics with dots in the center of the circle and the graphics with crosses in the center of the circle in Figure 4D indicate the direction of the magnetic field lines, and the size of the graphics indicates the strength of the magnetic field. Specifically, the figure with a dot in the center of the circle indicates that the magnetic field lines are vertically ejected from the inside of the paper to the outside of the paper, and the figure with a cross in the center of the circle indicates that the magnetic field lines are vertically injected from the outside of the paper to the inside of the paper.

In the first embodiment, the radiator 41a radiates electromagnetic waves outward, that is, electric fields and magnetic fields are generated in the dielectric 22a between the radiator 41a and the casing 2a and in the space outside the mobile terminal 100a. As shown in Figure 4C, when the radiator 41a is in CM mode, the electric field is distributed in the same direction on both sides of the feed point 423a of the radiator 41a, and the electric field intensity of the electric field is from the feed point 423a of the radiator 41a to the two sides of the radiator 41a. terminal enhancement. In this embodiment, the electric field lines on both sides of the feed point 423a of the radiator 41a repel each other in the same direction, so that the electric field lines on both sides of the feed point 423a of the radiator 41a extend away from the radiator 41a, so that CM The electric field in the wire antenna mode exhibits vertical polarization.

In addition, as shown in FIG. 4D, when the radiator 41a is in the CM line antenna mode, the magnetic induction lines are distributed in opposite directions on both sides of the feed point 423a of the radiator 41a, so that the magnetic induction lines are parallel to the outside of the radiator 41a. The surface 410a is distributed in a ring shape in the plane. The magnetic field strength of the magnetic field weakens from the feed point 423a of the radiator 41a to both ends of the radiator 41a.

In this application, the electric field shown in Figure 4C and the magnetic field shown in Figure 4D are generated by the two parts of the radiator 41a as a 1/4 wavelength antenna, and the electric field distribution shown in Figure 4C is the electric field of the CM line antenna mode Distribution, the magnetic field distribution shown in Fig. 4D is the magnetic field distribution of the CM wire antenna mode.

Please refer to FIG. 4B and FIG. 4E together. FIG. 4E is a schematic diagram of current distribution in a direct-fed CM wire antenna structure in the prior art.

Please refer to FIG. 4E , the CM mode can be excited on the strip radiator by means of symmetrical feeding, that is, two channels of equal amplitude are respectively fed from the feed point 423A of the radiator 41A to the first part 411A and the second part 412A RF signal in phase. In the prior art, a direct symmetrical feeding method is generally adopted to excite the CM mode on the line antenna, that is, two feed sources are used to provide two channels of radio frequency signals of equal amplitude and phase. However, in the process of engineering implementation, due to differences in structures and materials, it is difficult to obtain two identical feed sources, so that it is difficult to provide radio frequency signals of equal amplitude and phase.

Please refer to Fig. 4B, and the CM line antenna structure of coupling feeding in the first embodiment adopts the mode of single-point feeding to feed power to exciter 42a, and carries out coupling feeding to radiator 41a through exciter 42a, reduces The feeding difficulty is reduced, and the radiation efficiency and bandwidth potential of the radiator 41a are improved.

Please refer to FIG. 5A. FIG. 5A is an exploded schematic diagram of a partial structure of a mobile terminal 100b using a coupled-feed wire antenna structure provided in the present application. The coupled-feed wire antenna structure shown in FIG. 5A generates a wire antenna DM mode.

In the second embodiment, the mobile terminal 100b may include a casing 2b, a radiator 41b and an excitation body 42b, and the casing 2b may be provided with a notch 21b. The radiator 41b and the excitation body 42b may be located on the side of the housing 2b and fixedly mounted on the housing 2b. At least part of the structure of the radiator 41b may be located in the gap 21b. The excitation body 42b may be located inside the radiator 41b, and there is a gap between the radiator 41b and the radiator 41b. For the structure of the mobile terminal 100b in this embodiment and the connection relationship between the structures, reference may be made to the mobile terminal 100 shown in FIG. 3 , and only the differences will be described here.

In this embodiment, the radiator 41b may form a wire antenna. For the specific structure of the wire antenna and the connection relationship with other structures, reference may be made to the first embodiment, which will not be repeated here.

In this embodiment, the excitation body 42b may include a ring conductor 421b, so as to generate a uniform alternating magnetic field around the excitation body 42b. Both ends of the ring conductor 421b may be connected to the housing 2b to achieve grounding; there may be a gap between the middle part of the ring conductor 421b and the housing 2b. Exemplarily, the ring conductor 421b may be located on the side of the first side wall 211b of the notch 21b, or may be located in the middle of the first side wall 211b of the notch 21b, which is not limited in the present application. Understandably, the middle portion of the first side wall 211b is a portion inside the side of the first side wall 211b.

Exemplarily, the excitation body 42b may further include a feed point 423b, and the distance from the feed point 423b to both ends of the ring conductor 421b may be equal. The mobile terminal 100b may also include a feed source (not shown). The feed source feeds electrical signals from the feed point 423b into the excitation body 42b, and an alternating current is generated on the excitation body 42b. The alternating current generates an alternating magnetic field around the excitation body 42b. The radiator 41b generates an induced current under the excitation of the alternating magnetic field, and the mode of the induced current is the wire antenna DM mode. Afterwards, the radiator 41b converts the induced current into a radio frequency signal, and radiates the radio frequency signal.

Please refer to FIG. 5B . FIG. 5B is a schematic diagram of current distribution of the partial structure of the mobile terminal 100 b shown in FIG. 5A . Among them, the size of the arrow represents the strength of the current, and the arrow from large to small represents the current from strong to weak.

In the second embodiment, the exciter 42b feeds the radiator 41b through magnetic field coupling to excite the DM mode of the wire antenna. Such an excitation method can replace the DM antisymmetric feeding in the prior art, so as to transmit the electric signal to the radiator 41b. Specifically, the positive pole of the feed source can be connected to the feed point 423b, and the negative pole of the feed source can be connected to the housing 2 to achieve grounding. The current flows from the feed point 423b to the excitation body 42b, so that an alternating magnetic field (not shown) is generated around the excitation body 42b. At this time, the working mode of the radiator 41b is the DM mode of the wire antenna, and the structure of the antenna device 4b in the second embodiment is a coupled excitation DM wire antenna structure.

When the radiator 41b is in the DM mode, the intensity of the induced current on the radiator 41b weakens from the feeding point 423b of the radiator 41b to both ends. In addition, the intensity of the alternating current on the excitation body 42b decreases from the feed point 423b of the excitation body 42b to both ends, so that the magnetic field strength of the alternating magnetic field around the excitation body 42b decreases from the feed point 423b of the excitation body 42b to both ends. Therefore, the strength distribution of the magnetic field intensity of the alternating magnetic field around the excitation body 42b matches the strength distribution of the intensity of the induced current on the radiator 41b, so that the alternating magnetic field around the excitation body 42b can excite The induced current in the DM mode makes the radiator 41b in the DM mode.

In this application, the current distribution shown in FIG. 5B is the current distribution of the DM wire antenna mode. The first part 411b and the second part 412b of the radiator 41b together constitute a radiation branch.

Exemplarily, the electrical signals in the casing 2b are distributed around the excitation body 42b. The electric signal flows from a place away from the feed point 423b to the feed point 423b, and the electric signal is strongest at the feed point 423b, and weakens as the distance from the feed point 423b increases. 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 intensity of the induced current on the radiator 41b, thereby being able to generate alternating electric field superposition around the excitation body 42b, increasing the Coupling ability of alternating electric field.

Exemplarily, the ring conductor 421b may adopt a frame structure. The frame structure includes a first segment 4211b, a second segment 4212b and a third segment 4213b connected in sequence. Wherein, 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 two ends of the second segment 4212b. In this application, the distance between the feeding point 423b and both ends of the second segment 4212b of the ring conductor 421b may be equal.

Exemplarily, the first section 4211b of the ring conductor 421b and the part of the second section 4212b between the first section 4211b and the feeding point 423b may adopt radio frequency transmission line structures such as microstrip lines and coaxial lines. The radio frequency transmission line structure can be used to pass the electric signal from the feed source into the feed point 423b, and feed into the excitation body 42b by the feed point 423b, so that the intensity of the alternating current on the excitation body 42b is from the feed point 423b of the excitation body 42b to the Both ends are weakened, so that the DM mode is excited on the radiator 41b.

Exemplarily, the length of the second segment 4212b of the ring conductor 421b may be greater than 1mm, such as 10mm, 19mm, 30mm, etc., to ensure the radiation efficiency of the radiator 41 and reduce the difficulty of impedance matching.

In some other embodiments, the ring conductor 421b may also adopt a circular ring structure, an elliptical ring structure or other irregular shape structures, which are not limited in this application.

Please refer to FIG. 5C and FIG. 5D together. FIG. 5C is a schematic diagram of the electric field distribution in the partial structure of the mobile terminal 100b shown in FIG. 5A , and FIG. 5D is a schematic diagram of the magnetic field distribution in the partial structure of the mobile terminal 100b shown in FIG. 5A . Wherein, the direction of the dotted arrow in FIG. 5C represents the direction of the electric field, and the density of the dotted arrow represents the strength of the electric field. The graphics with dots in the center of the circle and the graphics with crosses in the center of the circle in FIG. 5D indicate the direction of the magnetic field lines, and the size of the graphics indicates the strength of the magnetic field. Specifically, the figure with a dot in the center of the circle indicates that the magnetic field lines are vertically ejected from the inside of the paper to the outside of the paper, and the figure with a cross in the center of the circle indicates that the magnetic field lines are vertically injected from the outside of the paper to the inside of the paper.

In the second embodiment, as shown in FIG. 5C, when the radiator 41b is in the DM mode, the electric field is oppositely distributed on both sides of the feed point 423b of the radiator 41b, and the electric field strength of the electric field is from the feed point 423b of the radiator 41b to 423b is enhanced toward both ends of the radiator 41b.

In this embodiment, the electric field lines on both sides of the feed point 423b of the radiator 41b attract each other in opposite directions, so that the electric field lines on both sides of the feed point 423b of the radiator 41b are connected end to end at the feed point 423b, thereby generating a radiation The extension direction of the body 41b is parallel to the electric field lines, so that the DM line antenna mode exhibits horizontal polarization.

In addition, there is also an electric field distribution near the outer surface 20b of the shell 2b, and the electric field near the outer surface 20b of the shell 2b is opposite to the electric field near the outer surface 410b of the adjacent radiator 41b, so that the electric field between the shell 2b and the radiator Electric field lines parallel to the extending direction of the radiator 41b are generated near the gap between 41b, which increases the intensity of the horizontal polarization of the coupled excited DM mode and improves the radiation efficiency.

In addition, as shown in FIG. 5D , the lines of magnetic induction are distributed in the same direction on both sides of the feeding point 423b of the radiator 41b. Exemplarily, the magnetic field lines are emitted from the side of the radiator 41b close to the casing 2b, and enter from the side of the radiator 41b away from the casing 2b, so that the magnetic field lines are perpendicular to the extending direction of the radiator 41b. distributed in circles in the plane. The magnetic field strength of the magnetic field weakens from the feed point 423b of the radiator 41b to both ends of the radiator 41b.

In this application, the electric field shown in Figure 5C and the magnetic field shown in Figure 5D are generated by the two parts of the radiator 41b as a 1/2 wavelength antenna, and the electric field distribution shown in Figure 5C is the electric field of the DM wire antenna mode distribution, 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 together. FIG. 5E is a schematic diagram of current distribution in a direct-fed DM wire antenna structure in the prior art.

Please refer to FIG. 5E , the DM mode can be excited on the radiator 41B of the strip radiator by means of anti-symmetric feeding, that is, the feed point 423B of the radiator 41B is fed into the first part 411B and the second part 412B respectively. Two RF signals with equal amplitude and anti-phase. In the prior art, the DM mode is generally excited on the line antenna by means of direct anti-symmetrical feeding, that is, two channels of equal-amplitude and anti-phase radio frequency signals are provided through two feeding sources, and the feeding structure is complex.

Please refer to Fig. 5B, and the DM line antenna structure of coupling feeding in the first embodiment adopts the mode of single-point feeding to feed power to exciter 42b, and carries out coupling feeding to radiator 41b through exciter 42b, reduces The feeding difficulty is reduced, and the radiation efficiency and bandwidth potential of the radiator 41b are improved.

Please refer to FIG. 6A. FIG. 6A is an exploded schematic diagram of a partial structure of a mobile terminal 100c using a coupled-feed slot antenna structure provided in this application. The coupled-feed slot antenna structure shown in FIG. 6A generates a slot antenna CM mode.

In the third embodiment, the mobile terminal 100c may include a casing 2c, a radiator 41c and an excitation body 42c, and the casing 2c may be provided with a notch 21c. The radiator 41c and the excitation body 42c may be located on the side of the housing 2c and fixedly mounted on the housing 2c. At least part of the structure of the radiator 41c may be located in the gap 21c. The excitation body 42c may be located inside the radiator 41c, and there is a gap between the radiator 41c and the radiator 41c. For the structure of the mobile terminal 100c in this embodiment and the connection relationship between the structures, reference may be made to the mobile terminal 100 shown in FIG. 3 , and only the differences are described here.

In this embodiment, the radiator 41c may form a slot antenna. The slot antenna can be formed by slotting the housing 2, the first side of the slot has an opening, and the opening can be located in the middle of the first side.

Exemplarily, the exciter 42c feeds an electrical signal into the radiator 41c from the middle of the radiator 41c through coupling feeding. The part between the two ends of the radiator 41c can be regarded as the middle part of the radiator 41c. The feeding point 423c of the excitation body 42c corresponds to the middle of the radiator 41c.

Exemplarily, both ends of the radiator 41c may be connected to the casing 2c. The slot antenna may include a third portion 413c and a fourth portion 414c. The third part 413c is a part from the middle of the radiator 41c to one end of the radiator 41c, and the fourth part 414c is a part from the middle of the radiator 41c to the other end of the radiator 41c.

Exemplarily, there may be a parallel capacitor 424c between the third part 413c and the fourth part 414c. In some other embodiments, there may be no gap between the third portion 413c and the fourth portion 414c, which is not limited in this application.

Exemplarily, one end of the third part 413c is connected to the second side wall 212c of the notch 21c, there is a gap between the other end of the third part 413c and one end of the fourth part 414c, and the other end of the fourth part 414c is connected to the second side wall of the notch 21c. The three side walls 213c are connected.

In this embodiment, the excitation body 42c may include a ring-shaped 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 will not be repeated here.

Please refer to FIG. 6B . FIG. 6B is a schematic diagram of current distribution of the partial structure of the mobile terminal 100c shown in FIG. 6A . Among them, the size of the arrow represents the strength of the current, and the arrow from large to small represents the current from strong to weak.

In the third embodiment, the exciter 42c couples and feeds the radiator 41c through magnetic field coupling. This feeding mode is the same as the anti-symmetrical feeding mode excited by the slot antenna CM in the prior art, and can be replaced. to transmit electrical signals to the radiator 41c. Specifically, the positive pole of the feed source can be connected to the feed point 423c, and the negative pole of the feed source can be connected to the housing 2c to achieve grounding. The current flows from the feed point 423c to the excitation body 42c, so that an alternating magnetic field (not shown) is generated around the excitation body 42c. Coupling feeding can be understood as providing excitation signals with equal amplitude and anti-phase 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 equal-amplitude and anti-phase excitation signal, and the directions of the third induced current and the fourth induced current are the same. At this time, the working 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 coupled excitation CM slot antenna structure.

When the radiator 41c is in the slot antenna CM mode, the intensity of the induced current on the radiator 41c increases from the feeding point 423c of the radiator 41c to both ends. In addition, the intensity of the alternating current on the excitation body 42c decreases from the feed point 423c of the excitation body 42c to both ends, so that the magnetic field strength of the alternating magnetic field around the excitation body 42c decreases from the feed point 423c of the excitation body 42c to both ends. Therefore, the strength distribution of the magnetic field intensity of the alternating magnetic field around the excitation body 42c matches the strength distribution of the intensity of the induced current on the radiator 41c, so that the alternating magnetic field around the excitation body 42c can excite on the radiation body 41c The induced current in CM mode makes the radiator 41c in CM mode.

In this application, the current distribution shown in FIG. 6B is the current distribution of the CM slot antenna mode.

Exemplarily, the distance between the middle part of the radiator 41c and the two ends of the radiator 41c is equal, and at this time, the lengths of the third part 413c and the fourth part 414c are equal. In this embodiment, the radiator 41c can extend in a straight line, and the length of the third part 413c and the fourth part 414c are equal to generate a symmetrically distributed radiation pattern and improve the radiation efficiency of the radiator 41c, and the third induced current It is the same as the frequency of the fourth induced current.

Please refer to FIG. 6C and FIG. 6D together. FIG. 6C is a schematic diagram of the electric field distribution in the partial structure of the mobile terminal 100c shown in FIG. 6A, and FIG. 6D is a schematic diagram of the magnetic field distribution in the partial structure of the mobile terminal 100c shown in FIG. 6A. Wherein, the direction of the dotted arrow in FIG. 6C represents the direction of the electric field, and the density of the dotted arrow represents the strength of the electric field. In FIG. 6D , the graphics with dots in the center of the circle and the graphics with crosses in the center of the circle indicate the direction of the magnetic field lines, and the size of the graphics indicates the strength of the magnetic field. Specifically, the figure with a dot in the center of the circle indicates that the magnetic field lines are vertically ejected from the inside of the paper to the outside of the paper, and the figure with a cross in the center of the circle indicates that the magnetic field lines are vertically injected from the outside of the paper to the inside of the paper.

In the third embodiment, as shown in FIG. 6C, when the radiator 41c is in the CM mode, the electric field is oppositely distributed on both sides of the feed point 423c of the radiator 41c, and the electric field strength of the electric field is from the feed point 423c of the radiator 41c to 423c weakens toward both ends of the radiator 41c.

In this embodiment, the electric field lines on both sides of the feed point 423c of the radiator 41c attract each other in opposite directions, so that the electric field lines on both sides of the feed point 423c of the radiator 41c are connected end to end at the feed point 423c, thereby generating a radiation The extension direction of the body 41c is parallel to the electric field lines, so that the CM slot antenna mode exhibits horizontal polarization.

In addition, as shown in FIG. 6D , the magnetic field lines are distributed oppositely on both sides of the feed point 423c of the radiator 41c, so that the magnetic field lines are distributed in a circle in a plane perpendicular to the extending direction of the radiator 41c. The magnetic field strength of the magnetic field weakens from the feeding point 423c of the radiator 41c to both ends of the radiator 41c.

In this application, the electric field shown in Figure 6C and the magnetic field shown in Figure 6D are generated by the two parts of the radiator 41c as a 1/4 wavelength antenna, and the electric field distribution shown in Figure 6C is the electric field of the CM slot antenna mode Distribution, the magnetic field distribution shown in Figure 6D is the magnetic field distribution of the CM slot antenna mode.

Please refer to FIG. 6B and FIG. 6E together. FIG. 6E is a schematic diagram of current distribution in a direct-fed CM slot antenna structure in the prior art.

Please refer to FIG. 6E , the CM mode can be excited on the radiator 41C using a slot-shaped radiator by means of antisymmetric feeding, that is, from the feeding point 423C of the radiator 41C to the third part 413C and the fourth part 414C respectively Feed in two channels of equal-amplitude and anti-phase RF signals. In the prior art, the CM mode is generally excited on the radiator 41C by means of direct anti-symmetric feeding, that is, two channels of equal-amplitude and anti-phase RF signals are provided through two feed sources, and the feeding structure is complicated.

Please refer to Fig. 6B, and the CM groove antenna structure of coupling feeding in the third embodiment adopts the mode of single-point feeding to feed power to exciter 42c, and carries out coupling feeding to radiator 41c through exciter 42c, reduces Feed difficulty is reduced, and the radiation efficiency and bandwidth potential of the radiator 41c are improved.

Please refer to FIG. 7A. FIG. 7A is an exploded schematic diagram of a partial structure of a mobile terminal 100d using a coupled-feed slot antenna structure provided in the present application. The coupled-feed slot antenna structure shown in FIG. 7A generates a slot antenna DM mode.

In the fourth embodiment, the mobile terminal 100d may include a casing 2d, a radiator 41d and an excitation body 42d, and the casing 2d may be provided with a notch 21d. The radiator 41d and the excitation body 42d may be located on the side of the casing 2d and fixedly mounted on the casing 2d. At least part of the structure of the radiator 41d may be located in the gap 21d. The excitation body 42d may be located inside the radiator 41d, and there is a gap between the radiator 41d and the radiator 41d. For the structure of the mobile terminal 100d in this embodiment and the connection relationship between the structures, reference may be made to the mobile terminal 100 shown in FIG. 3 , and only the differences will be described here.

In this embodiment, the radiator 41c may form a slot antenna. The slot antenna can be formed by slotting the housing 2 .

In this embodiment, the excitation body 42d may include a linear conductor 421d and a feed point 423d. Exemplarily, the excitation body 42d may also use the planar conductor 421a shown in FIG. 4A. As shown in FIG. 7A , the feed point 423d may be located in the middle of the linear conductor 421d. Specifically, the distances from the feeding point 423d to both ends of the linear conductor 421d may be equal or unequal, which is not limited in the present application. In this embodiment, the positive pole of the feed source can be connected to the feed point 423d, and the negative pole of the feed source can be connected to the casing 2d to achieve grounding. In this embodiment, the specific structure of the linear conductor 421d and the connection relationship with other structures can refer to the third embodiment, which will not be repeated here.

Please refer to FIG. 7B . FIG. 7B is a schematic diagram of current distribution of the partial structure of the mobile terminal 100d shown in FIG. 7A . Among them, the size of the arrow represents the strength of the current, and the arrow from large to small represents the current from strong to weak.

Exemplarily, the radiator 41d may be divided into a third part 413d and a fourth part 414d having equal lengths.

In the fourth embodiment, the exciter 42d feeds the radiator 41d through electric field coupling, which can be equivalent to DM symmetrical feeding, so as to transmit electric signals to the radiator 41d. Specifically, the alternating electric field provides excitation signals of equal amplitude and phase to the third part 413d and the fourth part 414d of the radiator 41d respectively. The third part 413d and the fourth part 414d respectively generate a third induced current and a fourth induced current under the excitation signals of equal amplitude and phase, and the directions of the third induced current and the fourth induced current are opposite. At this time, the working 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 coupled excitation DM slot antenna structure.

When the radiator 41d is in the DM mode, the intensity of the induced current on the radiator 41d increases from the feeding point 423d to both ends of the radiator 41d. In addition, the strength distribution of the magnetic field intensity of the alternating magnetic field around the excitation body 42d matches the strength distribution of the intensity of the induced current on the radiator 41d, so that the alternating magnetic field around the excitation body 42d can excite The induced current in the DM mode makes the radiator 41d in the DM mode.

In this application, the current distribution shown in FIG. 7B is the current distribution of the DM slot antenna mode.

Please refer to FIG. 7C and FIG. 7D together. FIG. 7C is a schematic diagram of the electric field distribution in the partial structure of the mobile terminal 100d shown in FIG. 7A, and FIG. 7D is a schematic diagram of the magnetic field distribution in the partial structure of the mobile terminal 100d shown in FIG. 7A. Wherein, the direction of the dotted arrow in FIG. 7C represents the direction of the electric field, and the density of the dotted arrow represents the strength of the electric field. In FIG. 7D , the dotted figure in the center of the circle and the crossed figure in the center of the circle indicate the direction of the magnetic induction line, and the size of the figure indicates the strength of the magnetic field. Specifically, the figure with a dot in the center of the circle indicates that the magnetic field lines are vertically ejected from the inside of the paper to the outside of the paper, and the figure with a cross in the center of the circle indicates that the magnetic field lines are vertically injected from the outside of the paper to the inside of the paper.

In the fourth embodiment, the radiator 41d radiates electromagnetic waves outward, that is, electric fields and magnetic fields are generated in the dielectric 22d between the radiator 41d and the casing 2d and in the space outside the mobile terminal 100d. As shown in Figure 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 from the feed point 423d of the radiator 41d to the radiator 41d enhanced at both ends.

In this embodiment, the electric field lines on both sides of the feed point 423d of the radiator 41d repel each other in the same direction, so that the electric field lines on both sides of the feed point 423d of the radiator 41d extend away from the radiator 41d, so that the DM The electric field of the slot antenna mode exhibits vertical polarization.

In addition, as shown in FIG. 7D, when the radiator 41d is in the DM slot antenna mode, the magnetic field lines are distributed in opposite directions on both sides of the feed point 423d of the radiator 41d, so that the magnetic field lines are parallel to the outside of the radiator 41d. The surface 410d is distributed in a ring shape in the plane. The magnetic field strength of the magnetic field weakens from the feeding point 423d of the radiator 41d to both ends of the radiator 41d.

In this application, the electric field shown in Figure 7C and the magnetic field shown in Figure 7D are generated by the two parts of the radiator 41d as a 1/2 wavelength antenna, and the electric field distribution shown in Figure 7C is the electric field of the DM slot antenna mode distribution, the magnetic field distribution shown in FIG. 7D is the magnetic field distribution of the DM slot antenna mode.

Please refer to FIG. 7D and FIG. 7E together. FIG. 7E is a schematic diagram of current distribution in a direct-fed DM slot antenna structure in the prior art.

Please refer to FIG. 7E , the DM mode can be excited on the slot-shaped radiator by means of symmetrical feeding, that is, two equal-amplitude and in-phase radio frequencies are respectively fed from the feed point 423D to the third part 413D and the fourth part 414D Signal. In the prior art, the DM mode is generally excited on the slot antenna by means of direct symmetrical feeding, that is, two channels of equal-amplitude and in-phase radio frequency signals are provided through two feed sources. However, in the process of engineering implementation, due to differences in structures and materials, it is difficult to obtain two identical feed sources, so that it is difficult to provide radio frequency signals of equal amplitude and phase.

Please refer to Fig. 7D, and the DM line antenna structure of coupling feeding in the fourth embodiment adopts the single-point feeding mode to feed power to the exciter 42d, and couples and feeds the radiator 41d through the exciter 42d, reducing the The feeding difficulty is reduced, and the radiation efficiency and bandwidth potential of the radiator 41d are improved.

Please refer to FIG. 4D , FIG. 5D , FIG. 6D and FIG. 7D together. Exemplarily, the radiator 41 may form a wire antenna or a slot antenna. Different exciters 42 can be used to couple and feed the wire antenna or the slot antenna, so that a variety of antenna modes can be excited on the wire antenna or the slot antenna, for example: the CM wire antenna mode with coupling feeding as shown in Figure 4D , DM line antenna mode with coupled feed as shown in FIG. 5D , CM slot antenna mode with coupled feed as shown in FIG. 6D , and DM slot antenna mode with coupled feed as shown in FIG. 7D . Understandably, the radiator 41 may also use a conductor having other shapes, such as an inverted F-shaped conductor, which is not limited in this application.

The present application can also carry out integrated design or combined design of different antenna structures shown in FIG. 4A , FIG. 5A , FIG. 6A and FIG. 7A , as well as antenna structures in the prior art, to form high-isolation antenna pairs.

Please refer to FIG. 4C and FIG. 5D together. From the electric field distribution of the CM line antenna mode shown in Figure 4C, it can be seen that the CM line antenna mode presents vertical polarization; and from the electric field distribution of the DM line antenna mode shown in Figure 5D, it can be seen that the DM line antenna mode presents a horizontal polarization polarization. In addition, due to the good isolation between the vertically polarized antenna mode and the horizontally polarized antenna mode, the antenna structure of the CM line antenna mode and the antenna structure of the DM line antenna mode are integrated to form an orthogonal mode, thereby obtaining Highly isolated antenna pairs.

Please refer to FIG. 8A. FIG. 8A is an exploded schematic diagram of a partial structure of a mobile terminal 100e using a high-isolation antenna pair provided by the present application in some embodiments. Exemplarily, the present application can carry out the integrated design of the coupled feeding CM line antenna structure shown in FIG. 4A and the coupled feeding DM line antenna structure shown in FIG. 5A to obtain the high isolation antenna pair shown in FIG. 8A .

In the fifth embodiment, a mobile terminal 100e may include a casing 2e, a radiator 51e and an excitation body 52e, and the casing 2e may be provided with a notch 21e. The radiator 51e and the excitation body 52e may be located on the side of the housing 2e and fixedly mounted on the housing 2e. At least part of the structure of the radiator 51e may be located in the gap 21e. The excitation body 52e may be located inside the radiator 51e, and there is a gap between the radiator 51e. For the structure of the mobile terminal 100e in this embodiment and the connection relationship between the structures, reference may be made to the mobile terminal 100 shown in FIG. 3 , and only the differences are described here.

Exemplarily, the exciter 52e may include a CM mode exciter 5210e and a DM mode exciter 5220e. Exemplarily, the CM mode exciter 5210e and the DM mode exciter 5220e are arranged at intervals.

In this embodiment, the CM mode exciter 5210e and the DM mode exciter 5220e can feed electrical signals into the radiator 51e from the middle of the radiator 51e through coupling feeding. The radiator 51e may form a wire antenna. The wire antenna includes a first part (not shown) and a second part (not shown). The first part is a part from the middle of the radiator 51e to one end of the radiator 51e, and the second part is a part from the middle of the radiator 51e to the other end of the radiator 51e. For the structure of the wire antenna and the connection relationship with other structures, reference may be made to the radiator 41a in the first embodiment as shown in FIG. 4A , which will not be repeated here.

Wherein, the CM mode exciter 5210e may include a planar conductor or a linear conductor. Planar conductors or linear conductors can also excite the first induced current in the first part and the second induced current in the second part by means of coupling feeding. The directions of the first induced current and the second induced current On the contrary, the electric and magnetic fields of the CM mode are thus excited on the radiator 51e. The specific structure of the planar conductor and the positional relationship and connection relationship with other structures can refer to the structure of the excitation body 42a in the first embodiment shown in Figure 4A; the specific structure of the linear conductor and the relationship between other structures For the positional relationship and connection relationship, reference may be made to the structure of the actuator 42a in the first embodiment as shown in FIG. 4A , and an adaptive design is performed according to the first embodiment, which will not be repeated here.

In this embodiment, there may be a gap between the DM mode exciter 5220e and the radiator. The DM mode exciter 5220e may include a ring conductor and a feed point 523e, and the distance between the feed point 523e and both ends of the ring conductor may be equal. The loop conductor can excite the fifth induced current in the first part and the sixth induced current in the second part through coupling feeding, and the direction of the fifth induced current and the sixth induced current are the same, so that in The radiator 51e excites an electric field and a magnetic field in the DM mode. Specifically, for the specific structure of the ring conductor and the positional relationship and connection relationship with other structures, you can refer to the structure of the excitation body 42b in the second embodiment shown in Figure 5A, and adapt it according to the second embodiment Sexual design, no more details here.

Please refer to Figure 8B, Figure 8C and Figure 8D together, Figure 8B is the antenna radiation pattern of the CM mode of the high isolation antenna pair shown in Figure 8A, and Figure 8C is the DM mode of the high isolation antenna pair shown in Figure 8A Antenna radiation pattern, FIG. 8D is an S-parameter diagram of the high-isolation antenna pair shown in FIG. 8A. The S-parameters of the wire antenna in the CM mode, the S-parameters of the wire antenna in the DM mode, and the isolation of the high-isolation antenna pair are shown in FIG. 8D.

Among them, as shown in Figure 8B and Figure 8C, the antenna radiation in CM mode presents vertical polarization, and the antenna radiation in DM mode presents horizontal polarization. Therefore, the antenna pair shown in Figure 8A has high isolation characteristics to be suitable for mobile The MINO antenna of the terminal 100e, and improves the transceiving performance of the MINO antenna.

Exemplarily, the distance between the middle part of the radiator 41e and the two ends of the radiator 41e is equal, and at this time, the lengths of the first part and the second part are equal. In this embodiment, the radiator 41e can extend along a straight line, and the length of the first part and the second part 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 distributed symmetrically, thereby increasing the CM The orthogonality of the antenna mode and the DM antenna mode further improves the isolation of the high-isolation antenna pair.

As shown in Figure 8D, the S-parameters of the CM-mode wire antenna are close to those of the DM-mode wire antenna, indicating that the antenna performance of the CM-mode wire antenna matches that of the DM-mode wire antenna. Moreover, the isolation degree of the high-isolation antenna pair is relatively high.

Please refer to FIG. 9A and FIG. 9B together. FIG. 9A is a schematic structural diagram of the high-isolation antenna pair provided by the present application in other embodiments, and FIG. 9B is a partial structural schematic diagram of the high-isolation antenna pair shown in FIG. 9A at another angle. .

In some other embodiments, the radiator 51e may form a wire antenna. The CM mode exciter 5210e of the high-isolation antenna pair can excite the CM mode on the radiator 51e through direct feeding. The DM mode exciter 5210e of the high-isolation antenna pair can excite the DM mode on the radiator 51e through coupling and feeding.

Wherein, the CM mode exciter 5210e may respectively feed two channels of radio frequency signals of equal amplitude and same phase to the first part and the second part of the radiator 51e through direct feeding. The first induced current is excited in the first part, and the second induced current is excited in the second part. The direction of the first induced current and the second induced current are opposite, so that the electric field and the CM mode are excited on the radiator 51e. magnetic field. Specifically, the CM mode exciter 5210e may include a feeder 5211e and a first feeder 5212e. One end of the feeder 5211e is connected to the radiator 51e, and the other end is connected to the first side wall 211e of the notch 21e. The first feeding point 5212e is located at the other end of the feeding line 5211e away from the radiator 51e. The feed source can feed the electric signal from the first feed point 5212e into the radiator 51e through the feeder 5211e, and excite the electric field and the magnetic field in CM mode on the radiator 51e.

In this embodiment, there may be a gap between the DM mode exciter 5220e and the radiator. The DM mode exciter 5220e may include a ring conductor 521e and a second feed point 523e, and the distance from the second feed point 523e to both ends of the ring conductor 521e may be equal. The loop conductor 521e can excite the fifth induced current in the first part and the sixth induced current in the second part through coupling feeding, and the directions of the fifth induced current and the sixth induced current are the same, so that The electric field and magnetic field of the DM mode are excited at the radiator 51e. Specifically, for the specific structure of the ring conductor and the positional relationship and connection relationship with other structures, you can refer to the structure of the excitation body 42b in the second embodiment shown in Figure 5A, and adapt it according to the second embodiment Sexual design, no more details here.

Please refer to Fig. 9C, Fig. 9C is the S-parameter diagram of the high isolation antenna pair shown in Fig. 9A; Fig. 9C shows the S-parameter of the line antenna of CM mode, the S-parameter of the line antenna of DM mode, and the high Isolation of the isolated antenna pair. The S-parameters of the CM-mode wire antenna are close to those of the DM-mode wire antenna, indicating that the antenna performance of the CM-mode wire antenna matches that of the DM-mode wire antenna. Moreover, the isolation degree of the high-isolation antenna pair is relatively high.

Please refer to FIG. 9D . FIG. 9D is a schematic structural diagram of the high-isolation antenna pair provided by the present application in some other embodiments. In some other embodiments, the radiator 51e may form a wire antenna. The CM mode exciter 5210e of the high-isolation antenna pair can also excite the CM mode on the radiator 51e through direct feeding.

In this embodiment, the CM mode exciter 5120e of the high-isolation antenna pair may refer to the coupled-feed CM mode exciter 5120e shown in FIG. 8A , which will not be repeated here. The DM mode exciter 5220e of the high-isolation antenna pair can also feed two equal-amplitude and anti-phase radio frequency signals to the first part and the second part of the radiator 51e through direct feeding, and excite the first part in the first part. An induced current and a second induced current are excited in the second part, and the directions of the first induced current and the second induced current are the same, so as to excite the electric field and the magnetic field of the DM mode on the radiator 51e. Specifically, the DM mode exciter 5220e may also include a feeder line and a feeder point 523e. One end of the feed line is connected to the radiator 51e, and the other end is connected to the feed point 523e. The feed point 523e is located at the other end of the feed line away from the radiator 51e. The feed source can feed the electric signal from the feed point 523e to the radiator 51e through the feeder line, so as to directly feed the radiator 51e.

Please refer to FIG. 9E . FIG. 9E is a schematic structural diagram of a pair of high-isolation antennas provided in another embodiment of the present application. In some 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, the slot has an opening on the first side, and the opening may be located in the middle of the first side. The slot antenna may not have openings.

Exemplarily, both ends of the radiator 51e may be connected to the casing 2e. The slot antenna may include a third part and a fourth part. The third part is a part from the middle of the radiator 51e to one end of the radiator 51e, and the fourth part is a part from the middle of the radiator 51e to the other end of the radiator 51e.

For the specific structure of the slot antenna and the positional relationship and connection relationship with other structures, you can refer to the structure of the radiator 41c in the third embodiment shown in FIG. 6A, and perform adaptive design according to the third embodiment. This will not be repeated here.

In this embodiment, there is a gap between the CM mode exciter 5220e and the radiator 51e. A ring conductor can be used as the CM mode exciter. The ring conductor can also excite the third induced current in the third part and the fourth induced current in the fourth part by means of coupling feeding, the direction of the third induced current and the fourth induced current are the same, Thus, the electric field and magnetic field of the CM mode are excited on the radiator 51e. The specific structure of the ring conductor and the positional relationship and connection relationship with other structures can refer to the structure of the excitation body 42c in the third embodiment shown in Figure 6A, and according to the third embodiment, no further repeat.

In this embodiment, there may also be a gap between the DM mode exciter (not shown) and the radiator 51e. The DM mode exciter may include a planar conductor or a linear conductor. The planar conductor or the linear conductor can also excite the fifth induced current in the third part and the sixth induced current in the fourth part by means of coupling feeding, the fifth induced current and the sixth induced current The directions are opposite, so that the electric field and magnetic field of the DM mode are excited on the radiator 51e. The specific structure of the planar conductor and the positional relationship and connection relationship with other structures can refer to the structure of the excitation body 42a in the first embodiment shown in Figure 4A; the specific structure of the linear conductor and the relationship between other structures For the positional relationship and connection relationship, reference may be made to the structure of the actuator 42d in the fourth embodiment shown in FIG. 7A , and the adaptive design is performed according to the first embodiment and the fourth embodiment, which will not be repeated here.

Please refer to FIG. 9F . FIG. 9F is a schematic structural diagram of a pair of high-isolation antennas provided by the present application in some other embodiments. In some other embodiments, the radiator 51e of the high-isolation antenna pair can also form a slot antenna, and the CM mode exciter 5220e can feed two circuits respectively to the first part and the second part of the radiator 51e through direct feeding. The radio frequency signal of equal amplitude and reverse excites the third induced current in the third part and the fourth induced current in the fourth part, and the directions of the third induced current and the fourth induced current are the same, so that in the radiator The electric field and magnetic field that excite the CM mode on 51e. Specifically, the CM mode exciter may include a feeder line and a feeder point. One end of the feeder is connected to the radiator 51e, and the other end is connected to the casing 2e. The first feed point is located at the other end of the feed line away from the radiator 51e. The feed source can feed the electric signal from the first feed point into the radiator 51e through the feeder line, and excite the electric field and magnetic field in CM mode on the radiator 51e.

The DM mode exciter 5210e can use a planar conductor or a linear conductor as shown in FIG. 7A to excite the DM mode on the radiator 51e by means of coupling and feeding, which will not be repeated here.

Please refer to FIG. 9G . FIG. 9G is a schematic structural diagram of more embodiments of the high-isolation antenna pair provided by the present application. In some other embodiments, the radiator 51e of the high-isolation antenna pair can also form a slot antenna. In this embodiment, the DM mode excitation body 5210e can directly feed power to the first part and the second part of the radiator 51e. Parts are respectively fed with two RF signals of equal amplitude and phase, the fifth induced current is excited in the third part, and the sixth induced current is excited in the fourth part, and the directions of the fifth induced current and the sixth induced current are opposite , so that the electric field and magnetic field of the DM mode are excited on the radiator 51e. Specifically, the DM mode exciter 5210e may include a feeder line and a feeder point. One end of the feeder wire is connected to the radiator 51e, and the other end is connected to the first side wall of the notch. The first feed point is located at the other end of the feed line away from the radiator 51e. The feed source can feed the electric signal from the first feed point into the radiator 51e through the feeder line, and excite the electric field and magnetic field of DM mode on the radiator 51e.

In this embodiment, there is a gap between the CM mode exciter 5220e and the radiator 51e. A ring conductor can be used as the CM mode exciter. The ring conductor can also excite the third induced current in the third part and the fourth induced current in the fourth part by means of coupling feeding, the direction of the third induced current and the fourth induced current are the same, Thus, the electric field and magnetic field of the CM mode are excited on the radiator 51e. The specific structure of the ring conductor and the positional relationship and connection relationship with other structures can refer to the structure of the excitation body 42c in the third embodiment shown in Figure 6A, and according to the third embodiment, no further repeat.

Understandably, the radiator 51e may also include conductors with other shapes, such as inverted F-shaped conductors, etc., which is not limited in the present application. In this embodiment, the CM mode exciter and the DM mode exciter need to be 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 51e.

Exemplarily, the high-isolation antenna pair may also include a first radiator 51e and a second radiator 51e (not shown in the figure) arranged at intervals. The first radiator 51e and the second radiator 51e may respectively correspond to a CM mode exciter and a DM mode exciter. Wherein, 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 the CM mode on the first radiator 51e, and makes the DM mode exciter in the The DM mode is excited on the second radiator 51e.

In some embodiments, the first radiator 51e may form a wire antenna, and the second radiator 51e may form a slot antenna.

The specific structure of the wire antenna and the positional relationship and connection relationship with other structures can refer to the structure of the radiator 41a in the first embodiment shown in Figure 4A, and perform adaptive design according to the first embodiment; For the specific structure of the antenna and the positional relationship and connection relationship with other structures, you can refer to the structure of the radiator 41c in the third embodiment shown in FIG. 6A, and perform adaptive design according to the third embodiment. Here No longer.

At this time, the CM mode exciter can excite the first induced current in the first part and the second induced current in the second part through direct feeding. The directions of the first induced current and the second induced current On the contrary, the electric and magnetic fields of the CM mode are thus excited on the radiator 51e. Specifically, the CM mode exciter may include a feeder line and a first feeder point. One end of the feeder wire is connected to the radiator 51e, and the other end is connected to the first side wall of the notch. The first feed point is located at the other end of the feed line away from the radiator 51e. The feed source can feed the electric signal from the first feed point into the radiator 51e through the feeder line, and excite the electric field and magnetic field in CM mode on the radiator 51e.

In addition, there may be a gap between the CM mode exciter (not shown) and the radiator 51e. The CM mode exciter may include a planar conductor or a linear conductor. Planar conductors or linear conductors can also be fed by coupling. The first induced current is excited in the first part, and the second induced current is excited in the second part. The directions of the first induced current and the second induced current are opposite. , so that the CM mode electric field and magnetic field are excited on the radiator 51e. The specific structure of the planar conductor and the positional relationship and connection relationship with other structures can refer to the structure of the excitation body 42a in the first embodiment shown in Figure 4A; the specific structure of the linear conductor and the relationship between other structures For the positional relationship and connection relationship, reference may be made to the structure of the actuator 42d in the fourth embodiment shown in FIG. 7A , and the adaptive design is performed according to the first embodiment and the fourth embodiment, which will not be repeated here.

At this time, the DM mode exciter (not shown in the figure) can excite the fifth induced current in the third part and the sixth induced current in the fourth part through direct feeding. The fifth induced current and The direction of the sixth induced current is opposite, so as to excite the electric field and magnetic field of DM mode on the radiator 51e. Specifically, the DM mode exciter may include a feeder line and a feeder point. One end of the feeder wire is connected to the radiator 51e, and the other end is connected to the first side wall of the notch. The first feed point is located at the other end of the feed line away from the radiator 51e. The feed source can feed the electric signal from the first feed point to the radiator 51e through the feeder line, and excite the electric field and magnetic field of DM mode on the radiator 51e.

In addition, there may be a gap between the DM mode exciter (not shown) and the radiator 51e. The DM mode exciter may include a planar conductor or a linear conductor. The planar conductor or the linear conductor can also excite the fifth induced current in the third part and the sixth induced current in the fourth part by means of coupling feeding, the fifth induced current and the sixth induced current The directions are opposite, so that the electric field and magnetic field of the DM mode are excited on the radiator 51e. The specific structure of the planar conductor and the positional relationship and connection relationship with other structures can refer to the structure of the excitation body 42a in the first embodiment shown in Figure 4A; the specific structure of the linear conductor and the relationship between other structures For the positional relationship and connection relationship, reference may be made to the structure of the actuator 42d in the fourth embodiment shown in FIG. 7A , and the adaptive design is performed according to the first embodiment and the fourth embodiment, which will not be repeated here.

In some other embodiments, the first radiator 51e may form a slot antenna and the second radiator 51e may form a wire antenna. The specific structure of the wire antenna and the positional relationship and connection relationship with other structures can refer to the structure of the radiator 41a in the first embodiment shown in Figure 4A, and perform adaptive design according to the first embodiment; For the specific structure of the antenna and the positional relationship and connection relationship with other structures, you can refer to the structure of the radiator 41c in the third embodiment shown in FIG. 6A, and perform adaptive design according to the third embodiment. Here No longer.

At this time, the CM mode exciter (not shown in the figure) can excite the third induced current in the third part and the fourth induced current in the fourth part through direct feeding. The third induced current and The direction of the fourth induced current is the same, so as to excite the electric field and the magnetic field in CM mode on the radiator 51e. Specifically, the CM mode exciter may include a feeder line and a feeder point. One end of the feeder wire is connected to the radiator 51e, and the other end is connected to the first side wall of the notch. The first feed point is located at the other end of the feed line away from the radiator 51e. The feed source can feed the electric signal from the first feed point into the radiator 51e through the feeder line, and excite the electric field and magnetic field in CM mode on the radiator 51e.

In addition, there may be a gap between the CM mode exciter (not shown) and the radiator 51e. A ring conductor can be used as the CM mode exciter. The ring conductor can also excite the third induced current in the third part and the fourth induced current in the fourth part by means of coupling feeding, the direction of the third induced current and the fourth induced current are the same, Thus, the electric field and magnetic field of the CM mode are excited on the radiator 51e. The specific structure of the ring conductor and the positional relationship and connection relationship with other structures can refer to the structure of the excitation body 42c in the third embodiment shown in Figure 6A, and according to the third embodiment, no further repeat.

In this embodiment, the DM mode exciter (not shown in the figure) can excite the first induced current in the first part and the second induced current in the second part through direct feeding. The first induced The direction of the current is the same as that of the second induced current, so that an electric field and a magnetic field in DM mode are excited on the radiator 51e. Specifically, the DM mode exciter may further include a feeder line and a feeder point (not shown in the figure). One end of the feeder wire is connected to the radiator 51e, and the other end is connected to the first side wall of the notch. The feed point is located at the other end of the feed line away from the radiator 51e. The feed source can feed the electric signal from the feed point to the radiator 51e through the feeder line, so as to directly feed the radiator 51e.

In addition, there may be a gap between the DM mode exciter and the radiator 51e. The DM mode exciter may include a ring conductor and a second feed point. The loop conductor can excite the fifth induced current in the first part and the sixth induced current in the second part through coupling feeding, and the direction of the fifth induced current and the sixth induced current are the same, so that in The radiator 51e excites an electric field and a magnetic field in the DM mode. Specifically, for the specific structure of the ring conductor and the positional relationship and connection relationship with other structures, you can refer to the structure of the excitation body 42b in the second embodiment shown in Figure 5A, and adapt it according to the second embodiment Sexual design, no more details here.

Please refer to FIG. 10A . FIG. 10A is a partial structural diagram of a mobile terminal 100f in some other embodiments applying a coupling-feeding DM wire antenna structure provided by the present application.

In the sixth embodiment, the specific structure of the mobile terminal 100f may refer to the second embodiment, and only the differences are described here.

Exemplarily, the excitation body 42f may further include a capacitor 424f. The capacitor 424f may be located between the ring conductor 421f and the first sidewall 211f of the notch 21f, and connect the ring conductor 421f and the housing 2f to achieve grounding.

Exemplarily, the capacitor 424f may be connected to the first segment 4211f of the ring conductor 421f, or may be connected to the third segment 4213f of the ring conductor 421f. In some other embodiments, the number of capacitors 424f may be two, and the two capacitors 424f may be respectively connected to the first section 4211f of the ring conductor 421f and the third section 4213f of the ring conductor 421f.

Please refer to FIG. 5A , FIG. 10A and FIG. 10B together. FIG. 10B is an antenna radiation efficiency diagram of the antenna device 4 b shown in FIG. 5A and the antenna device 4 b shown in FIG. 10A . Wherein, the ordinate in FIG. 10B is antenna radiation efficiency, and the unit is dB; the ordinate in FIG. 10B is antenna radiation frequency, and the unit is GHz. The "without capacitance" curve in Fig. 10B represents the variation trend of the antenna radiation efficiency of the antenna device 4b shown in Fig. 5A with the radiation frequency of the antenna; the "capacitance" curve in Fig. 10B represents the antenna device 4f shown in Fig. 10A. The variation trend of antenna radiation efficiency with the radiation frequency of the antenna.

It can be understood that adding a capacitor 424f between the ring conductor 421f and the housing 2 can increase the magnetic field strength of the alternating magnetic field generated by the ring conductor 421f, thereby increasing the induced current excited by the excitation body 42f on the radiator 41f intensity, and further increase the radiation efficiency of the radiator 41f.

It can also be seen from FIG. 10B that both the antenna device 4b shown in FIG. 5A and the antenna device 4f shown in FIG. 10A have high radiation efficiencies in the frequency range from 2GHz to 3GHz. In addition, 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 5A.

Exemplarily, 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.

Please refer to FIG. 11 . FIG. 11 is a partial structural diagram of a mobile terminal 100s applying a coupling-feeding DM wire antenna structure provided by the present application in some other embodiments.

In the seventh embodiment, the specific structure of the mobile terminal 100s may refer to the second embodiment, and only the differences are described here.

In this embodiment, the feed point 423s may be located at the end of the ring conductor 421s, that is, the feed point 423s may be located at the end of the first segment 4211s of the ring conductor 421s away from the second segment 4212s of the ring conductor 421s, or It may be located at the end of the third segment 4213s of the ring conductor 421s away from the second segment 4212s of the ring conductor 421s.

Please refer to FIG. 12 . FIG. 12 is a partial structural diagram of a mobile terminal 100h applying a coupling-feeding DM wire antenna structure provided by the present application in some other embodiments.

In the eighth embodiment, the specific structure of the mobile terminal 100h may refer to the second embodiment, and only the differences are described here.

In this embodiment, the feed point 423h may be located at the end of the ring conductor 421h. The excitation body 42h may also include a connecting piece 425h. The connecting piece 425h may be located between the ring conductor 421h and the first side wall 211h of the notch 21h, and connect the ring conductor 421h and the housing 2h. The feeding point 423h and the connecting piece 425h may be respectively located at two ends of the ring conductor 421h.

Exemplarily, the feed point 423h may be located at the end of the first segment 4211h of the ring conductor 421h away from the second segment 4212h of the ring conductor 421h. The connecting piece 425h can be located between the third section 4213h of the ring conductor 421h and the first side wall 211h of the notch 21h, and connect the third section 4213h of the ring conductor 421h with the housing 2h to achieve grounding.

In some other embodiments, the feed point 423h can also be located at the end of the third segment 4213h of the ring conductor 421h away from the second segment 4212h of the ring conductor 421h, and the connecting piece 425h can be located at the first segment 4211h of the ring conductor 421h and between the first side wall 211h of the notch 21h, and connect the first section 4211h of the ring conductor 421h with the housing 2h to achieve grounding.

Exemplarily, the connecting element 425h may include a capacitor or an inductor, which is not limited in the present application.

It can be understood that increasing the capacitance between the ring conductor 421h and the housing 2 can increase the magnetic field strength of the alternating magnetic field generated by the ring conductor 421h, thereby increasing the induction current induced by the excitation body 42h on the radiator 41h. Intensity, and further increase the radiation efficiency of the radiator 41h.

Please refer to FIG. 13 . FIG. 13 is a partial structural diagram of a mobile terminal 100i applying a coupling-feeding DM wire antenna structure provided in this application in some other embodiments.

In the ninth embodiment, the specific structure of the mobile terminal 100i may refer to the second embodiment, and only the differences are described here.

In this embodiment, the feed point 423i may be located at the end of the ring conductor 421i, that is, the feed point 423i may be located at the end of the first segment 4211i of the ring conductor 421i away from the second segment 4212i of the ring conductor 421i, or It may be located at the end of the third section 4213i of the ring conductor 421i away from the second section 4212i of the ring conductor 421i.

Exemplarily, the excitation body 42i may also include a capacitor 424i. The distance between the capacitor 424i and both ends of the second segment 4212i of the ring conductor 421i may be equal. It can be understood that adding capacitance 424i to the ring-shaped conductor 421i can increase the magnetic field strength of the alternating magnetic field generated by the ring-shaped conductor 421i, thereby increasing the intensity of the induced current excited by the excitation body 42i on the radiator 41i, and further The radiation efficiency of the radiator 41i is increased.

Please refer to FIG. 14 . FIG. 14 is a partial structural diagram of a mobile terminal 100j applying a coupling-feeding DM wire antenna structure provided in this application in more embodiments.

In the tenth embodiment, the specific structure of the mobile terminal 100j may refer to the second embodiment, and only the differences are described here.

Exemplarily, the ring conductor 421j of the excitation body 42j may further include a fourth segment 4214j and a fifth segment 5215j parallel to the second segment 4212j. Wherein, 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 side wall 211j of the notch 21j; one end of the fifth segment 4215j of the ring conductor 421j is connected to the ring The other end of the first section 4211j of the conductor 421j is connected to the first side wall 211j of the notch 21j.

In this embodiment, the feeding point 423j may be located at the end of the ring conductor 421j, and the excitation body 42j may further include a connecting piece 425j. The connecting piece 425j may be located between the ring conductor 421j and the first side wall 211j of the notch 21j, and connect the ring conductor 421j and the casing 2j. The feeding point 423j and the connecting piece 425j may be respectively located at two ends of the ring conductor 421j.

Exemplarily, the feed point 423j may be located at the end of the fourth segment 4214j of the ring conductor 421j away from the third segment 4213j of the ring conductor 421j. The connecting piece 425j can be located between the fifth segment 4215j of the ring conductor 421j and the first side wall 211j of the notch 21j, and connect the fifth segment 4215j of the ring conductor 421j with the housing 2j to achieve grounding.

In some other embodiments, the feed point 423j may also be located at the end of the fifth segment 4215j of the ring conductor 421j away from the first segment 4211j of the ring conductor 421j, and the connecting member 425j may be located at the fifth segment 4215j of the ring conductor 421j and between the first side wall 211j of the notch 21j, and connect the fifth section 4215j of the ring conductor 421j with the housing 2j to achieve grounding.

Exemplarily, the connecting element 425j may include a capacitor or an inductor, which is not limited in the present application.

It can be understood that increasing the capacitance between the ring conductor 421j and the housing 2 can increase the magnetic field intensity of the alternating magnetic field generated by the ring conductor 421j, thereby increasing the induction current induced by the excitation body 42j on the radiator 41j. intensity, and further increase the radiation efficiency of the radiator 41j.

In this application, the length of the loop conductor 421j is increased, thereby increasing the magnetic field intensity of the alternating magnetic field generated by the excitation body 42j, and further increasing the radiation efficiency of the radiator 41j.

Please refer to FIG. 15 . FIG. 15 is a partial structural diagram of a mobile terminal 100q applying a coupling-feeding DM wire antenna structure provided in this application in other embodiments.

In the eleventh embodiment, the specific structure of the mobile terminal 100q may refer to the second embodiment, and only the differences are described here.

Exemplarily, the ring conductor 421q of the excitation body 42q may further include a fourth segment 4214q and a fifth segment 5215q parallel to the second segment 4212q. Wherein, 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 side wall 211q of the notch 21q; one end of the fifth segment 4215q of the ring conductor 421q is connected to the ring The other end of the first section 4211q of the conductor 421q is connected to the first side wall 211q of the notch 21q.

In this embodiment, the feeding point 423q may be located at the end of the ring conductor 421q, and the excitation body 42q may further include a connecting piece 425q. The connecting piece 425q may be located between the ring conductor 421q and the first side wall 211q of the gap 21q, and connect the ring conductor 421q and the casing 2q. The feeding point 423q and the connecting piece 425q may be respectively located at two ends of the ring conductor 421q.

In this embodiment, the feed point 423q may be located at the end of the fourth segment 4214q of the ring conductor 421q away from the third segment 4213q of the ring conductor 421q. The connecting piece 425q can be located between the fifth segment 4215q of the ring conductor 421q and the first side wall 211q of the notch 21q, and connect the fifth segment 4215q of the ring conductor 421q with the housing 2q to achieve grounding.

In some other embodiments, the feed point 423q can also be located at the end of the fifth segment 4215q of the ring conductor 421q away from the first segment 4211q of the ring conductor 421q, and the connecting piece 425q can be located at the fifth segment 4215q of the ring conductor 421q and between the first side wall 211q of the notch 21q, and connect the fifth segment 4215q of the ring conductor 421q with the housing 2q to achieve grounding.

Exemplarily, the connecting element 425q may include a capacitor or an inductor, which is not limited in this application.

Exemplarily, the actuator 42q may also include a capacitor 424q. The distance between the capacitor 424q and both ends of the second segment 4212q of the ring conductor 421q may be equal.

It can be understood that increasing the capacitance on the ring conductor 421q can increase the magnetic field intensity of the alternating magnetic field generated by the ring conductor 421q, thereby increasing the intensity of the induced current excited by the excitation body 42q on the radiator 41q, and further increasing The radiation efficiency of the radiator 41q is shown.

In this application, the length of the loop conductor 421q is increased, thereby increasing the magnetic field strength of the alternating magnetic field generated by the excitation body 42q, and further increasing the radiation efficiency of the radiator 41q.

Please refer to FIG. 16 . FIG. 16 is a partial structural diagram of a mobile terminal 100n in some more embodiments applying a coupling-feeding DM wire antenna structure provided by the present application.

In the twelfth embodiment, the specific structure of the mobile terminal 100n may refer to the second embodiment, and only the differences are described here.

Exemplarily, the ring conductor 421n of the excitation body 42n may further include a fourth segment 4214n and a fifth segment 5215n parallel to the second segment 4212n. Wherein, 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 side wall 211n of the notch 21n; one end of the fifth segment 4215n of the ring conductor 421n is connected to the ring The other end of the first section 4211n of the conductor 421n is connected to the first sidewall 211n of the notch 21n.

In this embodiment, the feed point 423n may be located at the end of the ring conductor 421n. In this embodiment, the feed point 423n may be located at the end of the ring conductor 421n, and the excitation body 42n may further include a connector 425n. The connecting piece 425n can be located between the ring conductor 421n and the first side wall 211n of the notch 21n, and connects the ring conductor 421n and the casing 2n. The feeding point 423n and the connecting piece 425n may be respectively located at two ends of the ring conductor 421n.

In this embodiment, the feed point 423n may be located at the end of the fourth segment 4214n of the ring conductor 421n away from the third segment 4213n of the ring conductor 421n. The excitation body 42n can also include a connecting piece 425n, and the connecting piece 425n can be located between the fifth section 4215n of the ring conductor 421n and the first side wall 211n of the gap 21n, and connect the fifth section 4215n of the ring conductor 421n and the casing 2n for grounding.

In some other embodiments, the feed point 423n can also be located at the end of the fifth segment 4215n of the ring conductor 421n away from the first segment 4211n of the ring conductor 421n, and the connecting piece 425n can be located at the fifth segment 4215n of the ring conductor 421n and between the first side wall 211n of the notch 21n, and connect the fifth segment 4215n of the ring conductor 421n with the housing 2n to achieve grounding.

Exemplarily, the connecting element 425n may include a capacitor or an inductor, which is not limited in the present application.

Exemplarily, the excitation body 42n may also include multiple capacitors 424n, for example three. A plurality of capacitors 424n may be respectively located in the middle of the second section 4212n of the ring conductor 421n and at both ends of the second section 4212n. Understandably, the part between the two ends of the second section 4212n of the ring conductor 421n can be regarded as the middle part of the second section 4212n. Specifically, the distance between the capacitor 424n and the two ends of the second section 4212n of the ring conductor 421n may be equal or unequal.

It can be understood that increasing the capacitance on the ring conductor 421n can increase the magnetic field strength of the alternating magnetic field generated by the ring conductor 421n, thereby increasing the intensity of the induced current excited by the excitation body 42n on the radiator 41n, and further increasing The radiation efficiency of the radiator 41n is improved.

In this application, the length of the ring conductor 421n is increased, thereby increasing the magnetic field strength of the alternating magnetic field generated by the excitation body 42n, and further increasing the radiation efficiency of the radiator 41n.

The above description is only the specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application, and should It falls within the protection scope of the present application; in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (20)

1. A mobile terminal, characterized in that, comprising: The shell is made of conductive material, the side of the shell is provided with a notch, and the opening of the notch is located on the outer surface of the shell; a radiator at least partially located in the notch and fixedly installed in the notch; The exciter is located inside the radiator and has a gap with the radiator, the exciter is fixedly installed in the gap, the exciter includes a feed point, and the exciter is connected to the housing ;as well as A feed source, the positive pole of the feed source is connected to the feed point of the excitation body, and the negative pole of the feed source is connected to the casing; The feed source can feed electrical signals from the feed point into the excitation body and the casing, and generate an alternating magnetic field or an alternating electric field around the excitation body and the casing, and the radiator Capable of resonating and amplifying the alternating magnetic field or the alternating electric field, and generating induced current; The exciter feeds electrical signals into the radiator from the middle of the radiator through coupling feeding, and generates two induced currents on the radiator. 2. The mobile terminal according to claim 1, wherein the radiator forms a wire antenna, and gaps are formed between both ends of the wire antenna and the casing. 3. The mobile terminal according to claim 2, wherein the wire antenna includes a first part and a second part, the first part is a part from the middle of the radiator to one end of the radiator, the The second part is the part from the middle of the radiator to the other end of the radiator, the excitation body includes a planar conductor or a linear conductor, and the planar conductor or the linear conductor feeds power through coupling A first induced current is excited in the first part and a second induced current is excited in the second part by means of a method, and the directions of the first induced current and the second induced current are opposite. 4. The mobile terminal according to claim 3, wherein the first part and the second part together form a radiation branch, and the excitation body further comprises a ring conductor, and the two ends of the ring conductor are connected to The casing is connected, and there is a gap between the middle part of the ring conductor and the casing, and the ring conductor excites a fifth induced current in the first part by means of coupling feeding, and A sixth induced current is excited in the second part, and the direction of the fifth induced current and the sixth induced current are the same. 5. The mobile terminal according to claim 2, wherein the wire antenna comprises a first part and a second part, the first part is a part from the middle of the radiator to one end of the radiator, the The second part is the part from the middle of the radiator to the other end of the radiator, the first part and the second part together form a radiation branch, the excitation body includes a ring conductor, and the ring Both ends of the conductor are connected to the housing, and there is a gap between the middle part of the ring conductor and the housing, and the ring conductor excites the first A current is induced and a second induced current is excited in the second part, and the directions of the first induced current and the second induced current are the same. 6. The mobile terminal according to claim 1, wherein the exciter feeds electrical signals into the radiator from the middle of the radiator through coupling feeding, and the radiator forms a slot antenna , the slot antenna is formed by slotting on the housing, the two ends of the radiator are connected to the housing, the slot antenna includes a third part and a fourth part, and the third part is the The part from the middle of the radiator to one end of the radiator, and the fourth part is the part from the middle of the radiator to the other end of the radiator. 7. The mobile terminal according to claim 6, wherein the excitation body comprises a planar conductor or a linear conductor, and the planar conductor or the linear conductor is connected to the A third induced current is excited in the three parts, and a fourth induced current is excited in the fourth part, and the directions of the third induced current and the fourth induced current are opposite. 8. The mobile terminal according to claim 7, wherein the excitation body further comprises a ring conductor, the two ends of the ring conductor are connected to the housing, and the middle part of the ring conductor is connected to the housing. There is a gap between the shells, and the ring-shaped conductor excites the fifth induced current in the third part and the sixth induced current in the fourth part through coupling feeding, so The directions of the fifth induced current and the sixth induced current are the same. 9. The mobile terminal according to claim 6, wherein the excitation body adopts a ring conductor, the two ends of the ring conductor are connected to the housing, and the middle part of the ring conductor is connected to the There is a gap between the shells, and the ring-shaped conductor excites a third induced current in the third part and excites a fourth induced current in the fourth part by means of coupling feeding, and the The directions of the third induction current and the fourth induction current are the same. 10. The mobile terminal according to claim 7, characterized in that, part of the structure of the radiator forms the slot antenna, other structures of the radiator also form a wire antenna, and the two ends of the wire antenna are connected to the A gap is formed between the casings, the wire antenna includes a first part and a second part, the first part is a part from the middle of the radiator to one end of the radiator, and the second part is the 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 by means of coupling feeding, and the first induced current the direction of the current is opposite to that of the second induced current; or The excitation body excites a fifth induced current in the first part and a sixth induced current in the second part through direct feeding, and the fifth induced current and the sixth induced current The direction of the current flow is opposite. 11. The mobile terminal according to claim 9, wherein a part of the structure of the radiator forms the slot antenna, other structures of the radiator also form a wire antenna, and the two ends of the wire antenna are connected to the A gap is formed between the casings, the wire antenna includes a first part and a second part, the first part is a part from the middle of the radiator to one end of the radiator, and the second part is the a portion from the middle of the radiator to the other end of the radiator; The loop 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 first induced current and the second induced current the direction of the induced currents is the same; or The excitation body excites a fifth induced current in the first part and a sixth induced current in the second part through direct feeding, and the fifth induced current and the sixth induced current The direction of the current is the same. 12. The mobile terminal according to any one of claims 5, 8, 9 or 11, wherein the distance between the feed point and both ends of the ring-shaped conductor is equal, and the positive pole and negative pole of the feed source are Respectively connecting both sides of the feed point, the negative pole of the feed source is connected to the casing through the partial structure of the ring conductor; The exciter also includes a capacitor, the capacitor is located between the ring conductor and the housing, and connects the ring conductor and the housing; The ring-shaped conductor includes a first segment and a third segment arranged at intervals, the first segment and the third segment of the ring-shaped conductor respectively include two ends of the ring-shaped conductor, and the capacitance and the ring-shaped conductor connected to the first section of the ring conductor, or to the third section of said ring conductor; or There are two capacitors, and the two capacitors are respectively connected to the first segment of the ring conductor and the third segment of the ring conductor. 13. The mobile terminal according to any one of claims 5, 8, 9 or 11, wherein the feed point is located at an end of the ring conductor. 14. The mobile terminal according to claim 13, wherein the excitation body further comprises a connecting piece, the connecting piece includes a capacitor or an inductance, and the connecting piece is located between the ring conductor and the casing between, and connect the ring conductor and the housing; The feed point and the connector are respectively located at two ends of the ring conductor. 15. The mobile terminal according to claim 13, wherein the ring-shaped conductor comprises a first segment, a second segment and a third segment connected in sequence, and the first segment and the third segment of the ring-shaped conductor The two ends of the ring conductor are respectively included, and the excitation body also includes a capacitor, the capacitor is located in the middle of the second section of the ring conductor, and the capacitor is two meters away from the second section of the ring conductor. The distance between the ends is equal. 16. The mobile terminal according to any one of claims 5, 8, 9 or 11, wherein the ring-shaped conductor comprises a first segment, a second segment and a third segment connected in sequence, and the ring There is an included angle between the first section of the ring-shaped conductor and the third section of the ring-shaped conductor and the second section of the ring-shaped conductor, and the ring-shaped conductor also includes the second section of the ring-shaped conductor Parallel fourth and fifth sections, wherein the fourth section of the ring conductor is connected between the third section of the ring conductor and the housing, and the fifth section of the ring conductor is connected to Between the first segment of the ring conductor and the housing, the feed point is located at an end of the ring conductor. 17. The mobile terminal according to claim 16, wherein the excitation body further comprises a connector, the connector is located between the end of the ring conductor and the housing, and connects the The ring conductor and the casing, the feed point and the connecting piece are respectively located at two ends of the ring conductor. 18. The mobile terminal according to claim 17, wherein the excitation body further comprises a capacitor, and the capacitor is located in the middle of the second section of the ring conductor; or The excitation body also includes a first capacitor, a second capacitor and a third capacitor, the first capacitor is located in the middle of the second section of the ring conductor, the second capacitor and the third capacitor are respectively located in the both ends of the second segment of the loop conductor. 19. A high-isolation antenna pair, applied to a mobile terminal, the mobile terminal includes a housing and a feed source, and the housing is made of a metal material, characterized in that the high-isolation antenna pair includes a radiator, a CM mode excitation A body and a DM mode exciter, the CM mode exciter and the DM mode exciter are set at intervals; The positive pole of the feed source is connected to the feed point of the CM mode exciter and the DM mode exciter, and the negative pole of the feed source is connected to the housing; The CM mode exciter and the DM mode exciter feed electrical signals into the radiator from the middle of the radiator through coupling feeding, the radiator forms a wire antenna, and the two wire antennas A gap is formed between the end and the housing, the wire antenna includes a first part and a second part, the first part is a part from the middle of the radiator to one end of the radiator, and the second part a portion from the middle of the radiator to the other end of the radiator; There is a gap between the CM mode exciter and the radiator, the CM mode exciter includes a planar conductor or a linear conductor, and the planar conductor or the linear conductor is connected to the Exciting a first induced current in the first part, and exciting a second induced current in the second part, the directions of the first induced current and the second induced current are opposite; There is a gap between the DM mode exciter and the radiator, the DM mode exciter includes a ring conductor, and the ring conductor excites a fifth induced current in the first part by means of coupling feeding , and a sixth induced current is excited in the second part, and the directions of the fifth induced current and the sixth induced current are the same. 20. A high-isolation antenna pair, applied to a mobile terminal, the mobile terminal includes a casing and a feed source, and the casing is made of a metal material, characterized in that the high-isolation antenna pair includes a radiator, a CM mode excitation A body and a DM mode exciter, the CM mode exciter and the DM mode exciter are set at intervals; The positive pole of the feed source is connected to the feed point of the CM mode exciter and the DM mode exciter, and the negative pole of the feed source is connected to the housing; The CM mode exciter and the DM mode exciter feed electrical signals into the radiator from the middle of the radiator through coupling feeding, and the radiator forms a slot antenna, and the slot antenna passes through the Slots are formed on the housing, and both ends of the radiator are connected to the housing. The slot antenna includes a third part and a fourth part, and the third part is from the middle of the radiator to the a part of 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; There is a gap between the CM mode exciter and the radiator, and the CM mode exciter adopts a ring conductor, and the ring conductor excites a third induction in the third part by means of coupling feeding current, and a fourth induced current is excited in the fourth part, and the directions of the third induced current and the fourth induced current are the same; There is a gap between the DM mode exciter and the radiator, the DM mode exciter includes a planar conductor or a linear conductor, and the planar conductor or the linear conductor is connected to the A fifth induced current is excited in the third part, and a sixth induced current is excited in the fourth part, and directions of the fifth induced current and the sixth induced current are opposite.

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