CN115395229A - Antenna device and electronic apparatus - Google Patents

Antenna device and electronic apparatus Download PDF

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Publication number
CN115395229A
CN115395229A CN202211063202.1A CN202211063202A CN115395229A CN 115395229 A CN115395229 A CN 115395229A CN 202211063202 A CN202211063202 A CN 202211063202A CN 115395229 A CN115395229 A CN 115395229A
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China
Prior art keywords
antenna
frame body
carrier
radiation frame
annular radiation
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CN202211063202.1A
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Chinese (zh)
Inventor
张林光
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Lenovo Beijing Ltd
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Lenovo Beijing Ltd
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Priority to CN202211063202.1A priority Critical patent/CN115395229A/en
Publication of CN115395229A publication Critical patent/CN115395229A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Abstract

The application discloses antenna device and electronic equipment, antenna device includes: the antenna comprises an annular radiation frame body, a first antenna and a second antenna, wherein a first feeding point and a second feeding point are arranged at intervals and are respectively matched with the annular radiation frame body to form the first antenna and the second antenna; the carrier can bear and conduct electronic elements, the carrier and the annular radiation frame body share the same, the carrier is arranged in a cross section area formed by the annular radiation frame body in parallel, the cross section area is vertical to the opening direction of the annular radiation frame body, and a gap is formed between the carrier and the annular radiation frame body to form a clearance area of the first antenna and the second antenna; a capacitive element disposed between the first antenna and the carrier and an inductive element disposed between the second antenna and the carrier for controlling the degree of isolation between the first antenna and the second antenna.

Description

Antenna device and electronic apparatus
Technical Field
The present application relates to the field of communications technologies, and in particular, to an antenna device and an electronic apparatus.
Background
In a communication terminal having a dual antenna, the dual antenna needs to be integrated in a limited space.
However, because the control of the communication terminal is limited, there is a problem of signal interference caused by the fact that complete isolation of signals between the two antennas cannot be achieved.
Disclosure of Invention
In view of the above, the present application provides an antenna device and an electronic apparatus, as follows:
an antenna device, comprising:
the antenna comprises an annular radiation frame body, a first antenna and a second antenna, wherein a first feeding point and a second feeding point are arranged at intervals and are respectively matched with the annular radiation frame body to form the first antenna and the second antenna;
the carrier can bear and conduct electronic elements, and is shared with the annular radiation frame body, the carrier is arranged in a cross section area formed by the annular radiation frame body in parallel, the cross section area is vertical to the opening direction of the annular radiation frame body, and a gap is formed between the carrier and the annular radiation frame body so as to form a clearance area of the first antenna and the second antenna;
a capacitive element disposed between the first antenna and the carrier and an inductive element disposed between the second antenna and the carrier for controlling isolation between the first antenna and the second antenna.
In the above antenna device, preferably, the first feeding point is disposed at a first position of the annular radiation frame, the second feeding point is disposed at a second position of the annular radiation frame, and the first position and the second position are two positions that are farthest from each other on the annular radiation frame.
In the above antenna device, preferably, the annular radiation frame body includes a first radiation section and a second radiation section that are divided by the first feeding point and the second feeding point, one end of the capacitor element is connected to the first radiation section, and the other end of the capacitor element is connected to the grounded carrier, and one end of the inductor element is connected to the second radiation section, and the other end of the inductor element is connected to the grounded carrier;
wherein the first radiator segment and the second radiator segment are the same or different in size; and/or the presence of a gas in the atmosphere,
a first positional relationship is satisfied between the access location of the capacitive element on the first radiator segment and the access location of the inductive element on the second radiator segment.
In the above antenna device, it is preferable that the first radiator section and the second radiator section have the same size, the capacitive element is connected to a third position of the first radiator section, the inductive element is connected to a fourth position of the second radiator section, and a second positional relationship is satisfied between the third position and the fourth position.
The above antenna device preferably further includes: the control circuit is used for controlling the capacitance value of the capacitive element and the inductance of the inductive element according to the received adjusting instruction so as to control the isolation between the first antenna and the second antenna;
wherein the inductive element and the capacitive element are operable to cancel a reactance inherent to the annular radiating frame.
In the above antenna device, preferably, values of the capacitive element and the inductive element have a first correlation with a frequency of the antenna.
In the above antenna device, it is preferable that the positions of the capacitive element and the inductive element at which the first and second feed points are connected constitute current zero points of the first and second antennas, so that excitation currents flowing through the first and second antennas are distributed orthogonally.
In the antenna device, it is preferable that excitation currents flowing through the first antenna and the second antenna form a differential mode current and a common mode current orthogonal to each other.
In the above antenna device, preferably, the first feeding point and the second feeding point feed odd-mode signals with equal amplitude and opposite phase, so that the first antenna and the second antenna generate excitation radiation, where the first antenna is responsible for transmitting and receiving radiation signals, and the second antenna is responsible for receiving radiation signals.
An electronic device comprising at least:
an electronic component;
an antenna device, wherein the antenna device comprises:
the antenna comprises an annular radiation frame body, a first antenna and a second antenna, wherein a first feeding point and a second feeding point are arranged at intervals and are respectively matched with the annular radiation frame body to form the first antenna and the second antenna;
the carrier can bear and conduct the electronic element, and is shared with the annular radiation frame body, the carrier is arranged in a cross section area formed by the annular radiation frame body in parallel, the cross section area is vertical to the opening direction of the annular radiation frame body, and a gap is formed between the carrier and the annular radiation frame body so as to form a clearance area of the first antenna and the second antenna;
a capacitive element disposed between the first antenna and the carrier and an inductive element disposed between the second antenna and the carrier for controlling isolation between the first antenna and the second antenna.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an antenna device according to an embodiment of the present disclosure;
fig. 2 is another schematic structural diagram of an antenna device according to an embodiment of the present disclosure;
fig. 3 and fig. 4 are schematic structural diagrams of an antenna apparatus according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an electronic device according to a second embodiment of the present application;
fig. 6 is a schematic structural diagram of a metal center antenna implemented by the present application in a mobile phone;
fig. 7 is a graph of isolation achieved by a metal center antenna implemented by the present application for a mobile phone;
fig. 8 is a schematic diagram of a matching circuit of a metal middle frame antenna implemented by the present application;
FIG. 9 is a graph of the total system efficiency of a metal center antenna implemented by the present application for a mobile phone;
fig. 10 is a schematic view of current distribution of Port1 in a metal middle frame antenna implemented by the present application for a mobile phone;
fig. 11 is a schematic view of current distribution of Port2 in a metal middle frame antenna implemented by the present application for a mobile phone;
fig. 12 is a 2.4GHz xoy surface pattern on Port1 in a metal center antenna implemented by the present application for a mobile phone;
fig. 13 is a 2.4GHz xoy surface pattern on Port2 in a metal center antenna implemented by the present application for a mobile phone.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic structural diagram of an antenna apparatus according to an embodiment of the present disclosure, where the antenna apparatus may be configured on an electronic device, and the electronic device may be a mobile phone, a pad, or another communication terminal. The technical scheme in the embodiment is mainly used for improving signal interference in the antenna device.
Specifically, the antenna device in this embodiment may include the following structure:
the antenna comprises an annular radiation frame body 1, a first feed point 2 and a second feed point 3 are arranged at intervals, and the first feed point 2 and the second feed point 3 are respectively matched with the annular radiation frame body 1 to form a first antenna A and a second antenna B;
the carrier 5 capable of carrying and conducting the electronic component 4 is shared with the annular radiation frame 1, the carrier 5 is arranged in parallel in a cross section area 6 formed by the annular radiation frame 1, and the cross section area 6 is vertical to the opening direction of the annular radiation frame 1 to form a plate-shaped structure, so that the space is saved. And a gap is formed between the carrier 5 and the annular radiation frame body 1 to form a clearance area C of the first antenna A and the second antenna B.
A capacitive element 7 arranged between the first antenna a and the carrier 5 and an inductive element 8 arranged between the second antenna B and the carrier 5 for controlling the isolation between the first antenna a and the second antenna B. Thus, in the present embodiment, the isolation between the first antenna a and the second antenna B is controlled by changing the respective values of the capacitive element 7 and the inductive element 8.
The annular radiation frame 1 may have a square structure as shown in fig. 1, or may have other shapes, such as a perfect circle or an ellipse, as shown in a perfect circle in fig. 2. A first distance is provided between the first feeding point 2 and the second feeding point 3 on the loop-shaped radiation frame 1, so that the first feeding point 2 forms a first antenna a with the loop-shaped radiation frame 1 and the second feeding point 3 forms a second antenna B with the loop-shaped radiation frame 1. Based on this, the first antenna a and the second antenna B form a differential antenna. Specifically, the first feeding point 2 and the second feeding point 3 feed odd-mode signals with equal amplitude and opposite phases, so that the first antenna a and the second antenna B generate excitation radiation. Thus, the first antenna a serves as a main set antenna for responsible transmission and reception of the radiated signals, and the second antenna B serves as a diversity antenna for responsible reception of the radiated signals.
In addition, the electronic component 4 may be a chip such as a CPU (central processing unit) that can be carried on the carrier 5, and the carrier 5 may be a Printed Circuit Board PCB (Printed Circuit Board) that can carry various types of electronic components and that can electrically connect and data-connect the electronic components. The carrier 5 is connected to the annular radiation frame body 1 and the connection point is grounded, whereby the carrier 5 and the annular radiation frame body 1 share the ground.
It can be known from the foregoing solution that, in an antenna apparatus provided in the first embodiment of the present application, carriers capable of bearing and conducting an electronic component are arranged in parallel in a cross-sectional area formed by an annular radiation frame, and a first feeding point and a second feeding point that are arranged at intervals on the annular radiation frame are respectively matched with the annular radiation frame to form a first antenna and a second antenna, based on which, a capacitor element is arranged between the first antenna and the carrier and an inductor element is arranged between the second antenna and the carrier, so that the isolation between the first antenna and the second antenna is controlled, and further, the problem of signal interference between the first antenna and the second antenna is solved.
In one implementation, the first feeding point 2 may be disposed at a first position X of the annular radiation frame 1, and the second feeding point 3 may be disposed at a second position Y of the annular radiation frame 1, where the first position X and the second position Y are two positions farthest from each other on the annular radiation frame 1.
Taking a square annular radiation frame 1 in fig. 1 as an example, a first feeding point 2 and a second feeding point 3 are respectively disposed at diagonal vertices of the annular radiation frame 1, the first feeding point 2 is disposed at a vertex of an upper right corner of the annular radiation frame 1, the second feeding point 2 is disposed at a vertex of a lower left corner of the annular radiation frame 1, and an interval between the first feeding point 2 and the second feeding point 3 is a length of the diagonal of the annular radiation frame 1.
Taking the annular radiation frame 1 as a perfect circle as an example, as shown in fig. 2, the first feeding point 2 and the second feeding point 3 are arranged on a straight line passing through the center of the annular radiation frame 1, and the interval between the first feeding point 2 and the second feeding point 3 is the diameter of the annular radiation frame 1.
In one implementation, the annular radiation frame body 1 may include a first radiation segment 9 and a second radiation segment 10 that are divided by the first feeding point 2 and the second feeding point 3, that is, one-side radiation segment between the first feeding point 2 and the second feeding point 3 is denoted as the first radiation segment 9, and the other-side radiation segment between the first feeding point 2 and the second feeding point 3 is denoted as the second radiation segment 10. Based on this, one end of the capacitive element 7 is connected to the first radiator segment 9 and the other end of the capacitive element 7 is connected to the grounded carrier 5, e.g. the positive terminal of the capacitive element 7 is connected to the first radiator segment 9 and the negative terminal of the capacitive element 7 is connected to the carrier 5, i.e. to ground. While one end of the inductive element 8 is connected to the second radiator segment 10 and the other end of the inductive element 8 is connected to the grounded carrier 5, e.g. the positive pole of the inductive element 8 is connected to the second radiator segment 10 and the negative pole of the inductive element 8 is connected to the carrier 5, i.e. to ground.
Wherein the first radiator segments 9 are of the same or different size as the second radiator segments 10; and/or the first positional relationship is satisfied between the position of capacitive element 7 on first radiator segment 9 and the position of inductive element 8 on second radiator segment 10.
Wherein, the first position relation is as follows: the capacitive element 7 is disposed close to the first feeding point 2 and the inductive element 8 is disposed close to the second feeding point 3. For example, a connection terminal between the capacitive element 7 and the annular radiation frame body 1 is provided near the first feeding point 2, and a connection terminal between the inductive element 8 and the annular radiation frame body 1 is provided near the second feeding point 3.
In a specific implementation, the first radiator segments 9 are of the same size as the second radiator segments 10, while the capacitive element 7 is switched in a third position of the first radiator segments 9 and the inductive element 8 is switched in a fourth position of the second radiator segments 10, where the second positional relationship is satisfied between the third position and said fourth position.
Wherein, the second position relation is symmetrical with the center point of the annular radiation frame body 1. For example, taking the annular radiation frame body 1 as a square as an example, as shown in fig. 3, the capacitive element 7 is connected to a central position of a first frame a in the first radiation section 9, the first frame a is a frame in the first radiation section 9 where the first feeding point 2 is provided, the inductive element 8 is connected to a central position of a second frame b in the second radiation section 10, the second frame b is a frame opposite to the first frame a, and the second frame b is a frame in the second radiation section 10 where the second feeding point 3 is provided.
For another example, taking the annular radiation frame 1 as a square, as shown in fig. 1, the capacitance element 7 is connected to the vertex position of a first frame a in the first radiation segment 9, the first frame a is a frame in the first radiation segment 9 where the first feeding point 2 is disposed, and the capacitance element 7 and the first feeding point 2 are respectively located at the vertex positions on both sides of the first frame a; the inductance element 8 is connected to a vertex position of a second frame b in the second radiator section 10, the second frame b is a frame in which the second feeding point 3 is arranged in the second radiator section 10, and the inductance element 8 and the second feeding point 3 are respectively located at vertex positions on two sides of the second frame b.
Therefore, since the first radiator segment 9 and the second radiator segment 10 have the same size, i.e., are farthest away from each other, the currents formed by the first antenna a and the second antenna B at the diagonal positions of the annular radiation frame 1 are orthogonally distributed currents, so that higher interference immunity is obtained, and the signal isolation between the first antenna a and the second antenna B is higher.
In one implementation, the antenna apparatus in this embodiment may further include the following structure, as shown in fig. 4:
and the control circuit 11 is used for controlling the capacitance value of the capacitive element 7 and the inductance of the inductive element 8 according to the received adjusting instruction so as to control the isolation between the first antenna A and the second antenna B.
The inductance element 8 and the capacitance element 7 can be used to cancel the reactance inherent to the annular radiation housing 1.
Specifically, the values of the capacitive element 7 and the inductive element 8 have a first correlation with the frequency of the antenna. Based on this, in the present embodiment, the capacitance value of the capacitive element 7 and the inductance value of the inductive element 8 can be controlled by the control circuit 11, that is, the communication frequency of the first antenna a and the communication frequency of the second antenna B can be changed by changing the capacitance value of the capacitive element 7 and the inductance value of the inductive element 8. For example, the antenna frequencies of the first antenna a and the second antenna B can be adjusted lower by increasing one of the capacitance value of the capacitive element 7 and the inductance value of the inductive element 8, while the antenna frequencies of the first antenna a and the second antenna B can be increased by increasing the capacitance value of the capacitive element 7 and the inductance value of the inductive element 8.
In one implementation, the access positions of the capacitive element 7 and the inductive element 8, the first feeding point 2 and the second feeding point 3 constitute current zeros of the first antenna a and the second antenna B, so that excitation currents flowing through the first antenna a and the second antenna B are distributed orthogonally. Thereby, signal interference between the first antenna a and the second antenna B is minimized. Further, excitation currents flowing through the first antenna a and the second antenna B form a differential mode current and a common mode current which are orthogonal to each other. Thereby, a high isolation between the first antenna a and the second antenna B is achieved.
Referring to fig. 5, a schematic structural diagram of an electronic device according to a second embodiment of the present disclosure is shown, where the electronic device may be a mobile phone, a pad, or another communication terminal. The electronic device in this embodiment at least includes the following structure:
an electronic component 4;
an antenna device 12, wherein the antenna device 12 comprises:
the antenna comprises an annular radiation frame body 1, a first feed point 2 and a second feed point 3 are arranged at intervals, and the first feed point 2 and the second feed point 3 are respectively matched with the annular radiation frame body 1 to form a first antenna A and a second antenna B;
the carrier 5 capable of carrying and conducting the electronic component 4 is shared with the annular radiation frame 1, the carrier 5 is arranged in parallel in a cross section area 6 formed by the annular radiation frame 1, and the cross section area 6 is vertical to the opening direction of the annular radiation frame 1 to form a plate-shaped structure, so that the space is saved. And a gap is formed between the carrier 5 and the annular radiation frame body 1 to form a clearance area C of the first antenna a and the second antenna B.
A capacitive element 7 arranged between the first antenna a and the carrier 5 and an inductive element 8 arranged between the second antenna B and the carrier 5 for controlling the isolation between the first antenna a and the second antenna B. Therefore, in this embodiment, the isolation between the first antenna a and the second antenna B can be controlled by changing the respective values of the capacitive element 7 and the inductive element 8.
According to the above scheme, in the electronic device provided by the second embodiment of the present application, the carriers capable of carrying and conducting the electronic element are arranged in parallel in the cross-sectional area formed by the annular radiation frame, and the first feeding point and the second feeding point which are arranged at intervals on the annular radiation frame are respectively matched with the annular radiation frame to form the first antenna and the second antenna, based on which, the capacitor element is arranged between the first antenna and the carrier and the inductor element is arranged between the second antenna and the carrier, so that the isolation between the first antenna and the second antenna is controlled, and further the problem of signal interference between the first antenna and the second antenna is solved.
Taking a WiFi antenna in a mobile phone as an example, in a terminal antenna with a limited volume, based on the requirement of lightness and thinness of a mobile phone structure, dual antennas need to be integrated in a limited space, which causes that the distance between the antennas is small and the performance of the mobile phone is affected. In order to reduce interference between the antennas, a larger distance between the antennas needs to be ensured, so that the overall size of the antenna System is larger, but when the antennas are closer, mutual interference between the antenna units occurs, for example, the isolation between a Global Positioning System (GPS)/mobile hotspot WIFI/Bluetooth BT (Bluetooth) antenna and a WIFI MIMO (multiple-in multiple out) problem, and the isolation between the antenna units needs to be optimized.
In view of the above problems and the drawbacks of the existing solutions, the technical solution of the present application proposes:
as shown in fig. 6, the ports Port1 and Port2 of the metal middle frame antenna operate in the WLAN 2.4GHz band. The application provides a gap differential antenna of symmetry, port1 (position 01) are feed position (first feed point 2) of WIFI major set antenna, and Port2 (position 02) are feed position (second feed point 3) of WIFI diversity antenna, and both constitute difference structure. The antenna structure includes: a seamless metal middle frame, a PCB floor (position 05), a clearance area between the middle frame and the ground (position 06), a decoupling capacitor Cp (position 04), a decoupling inductor Lp (position 03) and a feed dual port in a diagonal position (position 01& position 02). The size of the metal middle frame may be 42mm 38mm, with a gap (06) of 1mm from the PCB, indicating a clearance of the non-metallic area.
The method comprises the following specific steps:
1) The feed ports 1&2 are located at diagonal positions, so that on one hand, more modes are excited, on the other hand, the effective radiation electric size of the antenna is increased due to symmetry, and the radiation efficiency and the bandwidth are improved;
2) The working principle is as follows: the decoupling capacitor Cp (capacitive element 7) and the decoupling inductor Lp (inductive element 8) tune the isolation of WIFI2.4G, and the operational principle is to load Lp or Cp to cancel the reactance inherent in the center frame, thereby providing an ideal grounding point for high frequencies. When the current flows out from one port, the current meets a current zero point, the current flowing to the other port is interrupted, and the isolation degree is improved.
3) Characterization of Lp or Cp position: the position range of Cp is from (04) to the midpoint of the transverse short side, the position range of Lp is from (03) to the midpoint of the transverse short side, and the optimal position is the midpoint;
4) Characterization of Lp or Cp values: when one of the two values is increased, the S21 trough resonance point shifts to a low frequency. As shown at the lowest point of the curve in fig. 7, the isolation S between the main diversity antennas can reach an isolation of 45dB when the proper value is selected. The matching circuit is as in fig. 8, lp =1.6nh, cp =0.7pf after optimization, and the two antennas have very high overall system efficiency as shown in fig. 9.
5) From the current distribution, the Port1 current presents even symmetry along the dotted line of the X axis and becomes a common mode state, as shown in the Port1 current distribution in FIG. 10, the black point in the graph is a current zero point; and exhibits odd symmetry along the X-axis to become a differential mode state, as shown by Port2 current distribution in fig. 11, where the black dots are current zeros. Both have orthogonal properties.
Based on this, the method can realize high isolation of WiFi2.4GHz 45dB, as shown in the 2.4GHz xoy plane direction on Port1 in FIG. 12, and as shown in the 2.4GHz xoy plane directional diagram on Port2 in FIG. 13, the directivity diagram is orthogonal on the xoy plane, and the directional diagram diversity effect is realized.
Therefore, the positions and values of the decoupling capacitor Cp and the decoupling inductor Lp are set, and the antenna structure and the direction diagram after decoupling are enabled to present orthogonality. Therefore, the isolation effect of the same frequency 45dB can be achieved without additional decoupling branches, the self-healing decoupling method is adopted, the adjustment is convenient, various complex complete machine state requirements can be met, in addition, orthogonal common mode and differential mode signals can be excited, the isolation is good, directional diagram diversity and signal complementation are realized, and the dead angle is few.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. An antenna device, comprising:
the antenna comprises an annular radiation frame body, a first antenna and a second antenna, wherein a first feed point and a second feed point are arranged at intervals and are respectively matched with the annular radiation frame body to form the first antenna and the second antenna;
the carrier can bear and conduct electronic elements, and is shared with the annular radiation frame body, the carrier is arranged in a cross section area formed by the annular radiation frame body in parallel, the cross section area is vertical to the opening direction of the annular radiation frame body, and a gap is formed between the carrier and the annular radiation frame body so as to form a clearance area of the first antenna and the second antenna;
a capacitive element disposed between the first antenna and the carrier and an inductive element disposed between the second antenna and the carrier for controlling isolation between the first antenna and the second antenna.
2. The antenna device according to claim 1, wherein the first feeding point is provided at a first position of the loop-shaped radiation frame body, the second feeding point is provided at a second position of the loop-shaped radiation frame body, and the first position and the second position are two positions that are farthest from each other on the loop-shaped radiation frame body.
3. The antenna device according to claim 1 or 2, wherein the annular radiation frame body includes a first radiation section and a second radiation section divided by the first feeding point and the second feeding point, one end of the capacitive element is connected to the first radiation section, and the other end is connected to the grounded carrier, and one end of the inductive element is connected to the second radiation section, and the other end is connected to the grounded carrier;
wherein the first and second radiator segments are the same or different in size; and/or the presence of a gas in the atmosphere,
the capacitive element satisfies a first positional relationship between an access position on the first radiator segment and an access position on the second radiator segment.
4. The antenna device as in claim 3, said first radiator segment being the same size as said second radiator segment, said capacitive element being coupled in a third position of said first radiator segment, said inductive element being coupled in a fourth position of said second radiator segment, a second positional relationship being satisfied between said third position and said fourth position.
5. The antenna device of claim 1, further comprising: the control circuit is used for controlling the capacitance value of the capacitive element and the inductance of the inductive element according to the received adjusting instruction so as to control the isolation between the first antenna and the second antenna;
wherein the inductive element and the capacitive element are operable to cancel a reactance inherent to the annular radiating frame.
6. The antenna device according to claim 5, wherein values of the capacitive element and the inductive element have a first correlation with a frequency of the antenna.
7. The antenna device according to claim 1 or 4, wherein the access positions of the capacitive element and the inductive element, the first feeding point, and the second feeding point constitute current zeros of the first antenna and the second antenna so that excitation currents flowing through the first antenna and the second antenna are orthogonally distributed.
8. The antenna device according to claim 7, wherein excitation currents flowing through the first antenna and the second antenna form a differential mode current and a common mode current which are orthogonal to each other.
9. The antenna device according to claim 1, wherein the first and second feed points feed odd-mode signals of equal amplitude and opposite phase such that the first and second antennas generate excitation radiation, wherein the first antenna is responsible for transmission and reception of radiated signals and the second antenna is responsible for reception of radiated signals.
10. An electronic device comprising at least:
an electronic component;
an antenna device, wherein the antenna device comprises:
the antenna comprises an annular radiation frame body, a first antenna and a second antenna, wherein a first feeding point and a second feeding point are arranged at intervals and are respectively matched with the annular radiation frame body to form the first antenna and the second antenna;
the carrier can bear and conduct the electronic element, and is shared with the annular radiation frame body, the carrier is arranged in a cross section area formed by the annular radiation frame body in parallel, the cross section area is vertical to the opening direction of the annular radiation frame body, and a gap is formed between the carrier and the annular radiation frame body so as to form a clearance area of the first antenna and the second antenna;
a capacitive element disposed between the first antenna and the carrier and an inductive element disposed between the second antenna and the carrier for controlling isolation between the first antenna and the second antenna.
CN202211063202.1A 2022-08-31 2022-08-31 Antenna device and electronic apparatus Pending CN115395229A (en)

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CN115395229A true CN115395229A (en) 2022-11-25

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