High-isolation terminal antenna system

Abstract

The embodiment of the invention discloses a high-isolation terminal antenna system, which relates to the technical field of antennas, can be combined with current loop antennas and / or magnetic current loop antennas with different position characteristics, and provides better isolation while providing better radiation performance. According to the specific scheme, the terminal antenna system comprises a first antenna and a second antenna, and the first antenna and the second antenna comprise at least one current loop antenna or magnetic current loop antenna. When the current loop antenna works, a uniform magnetic field is distributed between the radiator of the current loop antenna and the reference ground, and when the magnetic current loop antenna works, a uniform electric field is distributed between the radiator of the magnetic current loop antenna and the reference ground. The first antenna and the second antenna are arranged on the same side of the electronic equipment, or the first antenna and the second antenna are arranged on two opposite sides of the electronic equipment.

Description

[0001] This application is a divisional application. The application number of the original application is 202111278457.5, and the original application date is October 30, 2021. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of antenna technology, and in particular to a high-isolation terminal antenna system. Background Art

[0003] In electronic devices, multiple antennas can be set up to support the increasing wireless communication needs of electronic devices. When multiple antennas work at the same time, they may interfere with each other, thereby affecting the overall radiation performance of the electronic device. By improving the isolation between multiple antennas, the influence between multiple antennas during operation can be effectively reduced. Summary of the invention

[0004] The embodiment of the present application provides a high-isolation terminal antenna system, which can combine current loop antennas and / or magnetic current loop antennas with different position characteristics to provide better isolation while providing better radiation performance.

[0005] In order to achieve the above purpose, the embodiment of the present application adopts the following technical solution:

[0006] In a first aspect, a high-isolation terminal antenna system is provided, which is applied to an electronic device, and the terminal antenna system includes a first antenna and a second antenna, and the first antenna and the second antenna include at least one current loop antenna or a magnetic current loop antenna. When the current loop antenna is working, a uniform magnetic field is distributed between the radiator of the current loop antenna and the reference ground, and when the magnetic current loop antenna is working, a uniform electric field is distributed between the radiator of the magnetic current loop antenna and the reference ground. The first antenna and the second antenna are arranged on the same side of the electronic device, or the first antenna and the second antenna are arranged on two opposite sides of the electronic device.

[0007] Based on this scheme, two schemes for obtaining high-isolation antennas based on different position settings are provided. In this example, the high-isolation antenna system may include at least one current loop antenna or a magnetic current loop antenna, thereby ensuring that the antenna system can provide at least one antenna with good radiation performance for the working frequency band. In addition, based on the position distribution of series or parallel connection (i.e., setting on the same side) and relative setting (i.e., setting on two opposite sides), the two antennas can respectively excite orthogonal currents on the floor, thereby obtaining high isolation characteristics.

[0008] In one possible design, when the first antenna is a magnetic flux loop antenna, the second antenna is an electric current loop antenna. Based on this solution, the types of antennas included in the antenna system in this application are limited. For example, when one antenna is a magnetic flux loop, the other antenna can be an electric current loop antenna.

[0009] In one possible design, the first antenna and the second antenna are in a direct-fed feeding form, or the first antenna and the second antenna are in a coupled-fed feeding form. Based on this scheme, the feeding form of the antenna included in the antenna system in this application is defined. For example, any antenna in the terminal antenna system can be directly fed or coupled-fed.

[0010] In one possible design, when the first antenna is working, the floor current is excited in a first direction, and when the second antenna is working, the floor current is excited in a second direction, and the first direction and the second direction are orthogonal. Based on this solution, a description is provided of how the solution provided by the present application can obtain high isolation characteristics. Since the two antennas can respectively excite orthogonal (or nearly orthogonal) currents on the floor, the two antennas can obtain a higher degree of isolation.

[0011] In one possible design, the first antenna and the second antenna are arranged on the same side of the electronic device, including: the first antenna and the second antenna are arranged on the first side of the electronic device, and the projections of the first antenna and the second antenna on the first side do not overlap with each other. Based on this scheme, a specific example of the position of serial distribution is provided. In this example, two antennas in a terminal antenna system are taken as an example. The two antennas can be distributed in series on the same side of an electronic device (such as a mobile phone). For example, both antennas are located on the upper side of the mobile phone, distributed along the x-axis, and the projections in the y-direction do not overlap with each other. Thereby achieving serial distribution.

[0012] In a possible design, when the first antenna and the second antenna are in a direct-fed feeding form, the feeding point of the first antenna is set on the first antenna, close to one end of the second antenna. The feeding point of the second antenna is set on the second antenna, close to one end of the first antenna. Alternatively, the feeding point of the first antenna is set on the first antenna, away from one end of the second antenna. The feeding point of the second antenna is set on the second antenna, away from one end of the first antenna. Based on this scheme, a definition of the feeding point in a series distribution case is provided. For example, the feeding points of the two antennas can be set close to each other, and for another example, the feeding points of the two antennas can be set away from each other.

[0013] In a possible design, the terminal antenna system also includes a third antenna, which is also arranged on the first side. The projections of the radiators of the third antenna, the first antenna, and the second antenna in a direction perpendicular to the first direction do not overlap, and the second antenna is arranged between the first antenna and the third antenna. Based on this scheme, a schematic diagram of the series distribution of three antennas is provided. In this example, in addition to the first antenna and the second antenna, a third antenna can also be arranged. For example, the first antenna is arranged on the left part of the top edge of the mobile phone, the second antenna is arranged at the center of the top plate of the mobile phone, and the third antenna is arranged on the right part of the top edge of the mobile phone.

[0014] In a possible design, the first antenna is a magnetic current loop antenna, the second antenna is an electric current loop antenna, and the third antenna is a magnetic current loop antenna. Based on this solution, a type definition of each antenna is provided in a scenario where three antennas are distributed in series.

[0015] In a possible design, the first antenna and the third antenna constitute a first distributed antenna pair, and the first distributed antenna pair includes a first port, and the first port is connected to the port of the first antenna and the port of the third antenna. When the terminal antenna system is working, the first port is used to input equal-amplitude and in-phase feeding signals to the first antenna and the third antenna, respectively. Based on this scheme, an example of the feeding excitation method of each antenna in a series distribution scenario of three antennas is provided. In this example, the first antenna and the third antenna can constitute a distributed antenna pair. The port of the first antenna and the port of the second antenna can be connected to the first port for feeding, and the first antenna and the third antenna are symmetrically fed through the first port. As a result, the floor current excited by the distributed antenna pair formed by the first antenna and the third antenna can be orthogonally distributed with the floor current excited by the second antenna, thereby obtaining high isolation characteristics.

[0016] In a possible design, the first antenna, the second antenna and the third antenna are all current loop antennas. Based on this solution, a type definition for each antenna in a scenario where three antennas are distributed in series is provided.

[0017] In a possible design, the first antenna and the third antenna constitute a second distributed antenna pair, and the second distributed antenna pair includes a second port, and the second port is connected to the port of the first antenna and the port of the third antenna. When the terminal antenna system is working, the first port is used to input equal-amplitude and anti-phase feeding signals to the first antenna and the third antenna, respectively. The current direction of the second distributed antenna pair exciting the floor is orthogonal to the current direction of the second antenna exciting the floor. Based on this scheme, the first antenna and the third antenna (i.e., the left and right current loop antennas) can be fed antisymmetrically, so that the floor current excited by the distributed antenna pair composed of the first antenna and the third antenna can be distributed orthogonally to the floor current excited by the second antenna, thereby obtaining high isolation characteristics.

[0018] In one possible design, the first antenna and the second antenna are arranged on the same side of the electronic device, including: the first antenna and the second antenna are arranged on the first side of the electronic device, and the projections of the first antenna and the second antenna on the first side overlap at least partially. Based on this scheme, a specific example of parallel distribution positions is provided. In this example, two antennas in a terminal antenna system are taken as an example. The two antennas can be distributed in parallel on the same side of an electronic device (such as a mobile phone). For example, both antennas are located on the upper side of the mobile phone, distributed along the x-axis, and the projections in the y-direction overlap at least partially. Thus, parallel distribution is achieved.

[0019] In a possible design, the planes where the radiators of the first antenna and the second antenna are located are orthogonal. Based on this solution, a specific parallel distribution implementation is provided. For example, the first antenna can be located in the xoz plane, and the second antenna can be located in the xoy plane. The projections on the x-axis have at least partial overlap.

[0020] In a possible design, when the first antenna is a current loop antenna, the second antenna is any one of the following antennas: a magnetic current loop antenna, a CM wire antenna, and a DM slot antenna. Based on this solution, a type definition of two antennas in a parallel distribution scenario is provided. It can be understood that the current loop antenna can excite transverse currents, and the magnetic current loop antenna, the CM wire antenna, and the DM slot antenna can excite longitudinal currents, thereby enabling the first antenna and the second antenna to have high isolation characteristics.

[0021] In one possible design, the first antenna and the second antenna are arranged on two opposite sides of the electronic device, including: the first antenna is arranged at a first position on the first side of the electronic device, the second antenna is arranged at a second position on the second side of the electronic device, and the first side and the second side are respectively adjacent to the third side of the electronic device. Based on this scheme, a specific example of relative distribution positions is provided. In this example, two antennas in a terminal antenna system are taken as an example. The two antennas can be arranged on two opposite sides of an electronic device (such as a mobile phone). For example, the first antenna is located on the left long side of the mobile phone, and the second antenna is located on the right long side of the mobile phone.

[0022] In a possible design, the first position and the second position are axially symmetrical about the midline of the third side. Based on this solution, a definition of the relative position relationship between the first antenna and the second antenna is provided. For example, the positions of the first antenna and the second antenna can be axially symmetrical relative to the midline of the upper side of the mobile phone. In this way, the first antenna and the second antenna can be located at the upper end, the middle, or the lower end of the left long side and the right long side, respectively.

[0023] In a possible design, the first position is located in the middle of the first side, and the second position is located in the middle of the second side. Based on this solution, a specific position definition of the first antenna and the second antenna is provided. For example, the first antenna can be located in the middle of the left long side, and the second antenna can be located in the middle of the right long side.

[0024] In a possible design, when the first antenna and the second antenna are in a direct-fed feeding form, the feeding point of the first antenna is set on the radiator of the first antenna, the feeding point of the second antenna is set on the radiator of the second antenna, and the feeding point of the first antenna and the feeding point of the second antenna are respectively set on the same side of the radiator of the first antenna and the radiator of the second antenna. Based on this scheme, examples of the positions of the feeding points of the direct-fed antennas in parallel distribution and relative distribution scenarios are provided. For example, in the case where the two antennas are distributed in parallel on the upper side, the feeding points of the two antennas can be both set at the left end of their respective radiators, or both set at the right end of their respective radiators. For another example, in the case where the two antennas are relatively distributed on the left and right sides, the feeding points of the direct-fed antennas can be both set at the upper end of their respective radiators, or both set at the lower end of their respective radiators.

[0025] In a possible design, the current loop antenna includes a current loop line antenna and a current loop slot antenna, the radiator of the current loop line antenna is connected in parallel with at least one first capacitor to ground, and the radiator of the current loop slot antenna is connected in series with at least one second capacitor. The first capacitor is used to adjust the current distribution on the current loop line antenna to obtain a uniform magnetic field between the current loop line antenna and the reference ground, and the second capacitor is used to adjust the current distribution on the current loop slot antenna to obtain a uniform magnetic field between the current loop slot antenna and the reference ground. Based on this solution, a specific example of the current loop antenna is provided.

[0026] In a possible design, the current loop wire antenna includes a current loop monopole antenna and a current loop dipole antenna. The current loop slot antenna includes a current loop left-hand antenna and a current loop slot antenna. Based on this solution, several specific examples of current loop antenna types are provided.

[0027] In a possible design, the radiator of the magnetic current loop antenna is connected in parallel with at least one first inductor grounded, and the radiator of the magnetic current loop slot antenna is connected in series with at least one second inductor. The first inductor is used to adjust the current distribution on the magnetic current loop antenna to obtain a uniform electric field between the magnetic current loop antenna and the reference ground, and the second inductor is used to adjust the current distribution on the magnetic current loop slot antenna to obtain a uniform electric field between the magnetic current loop slot antenna and the reference ground. Based on this solution, a specific example of a magnetic current loop antenna is provided.

[0028] In a possible design, the magnetic flux loop line antenna includes a magnetic flux loop monopole antenna and a magnetic flux loop dipole antenna. The magnetic flux loop slot antenna includes a magnetic flux loop left-hand antenna and a magnetic flux loop slot antenna. Based on this solution, several specific examples of magnetic flux loop antenna types are provided.

[0029] In a second aspect, a high-isolation terminal antenna system is provided, which is applied to an electronic device, and the terminal antenna system includes a first antenna and a second antenna, wherein the first antenna and the second antenna include at least one current loop antenna or a magnetic current loop antenna. The first antenna and the second antenna are arranged on the same side of the electronic device, or the first antenna and the second antenna are arranged on two opposite sides of the electronic device. Wherein, when the current loop antenna is a current loop monopole antenna or a current loop dipole antenna, at least one end of the current loop antenna radiator is provided with a first capacitor grounded. When the current loop antenna is a current loop slot antenna or a current loop left-hand antenna, at least one second capacitor is arranged in series on the current loop antenna radiator. Wherein, the capacitance range of the first capacitor and the second capacitor is set as follows: when the operating frequency band of the current loop antenna is 450MHz-1GHz, the capacitance of the first capacitor or the second capacitor is set within [1.5pF, 15pF]. When the operating frequency band of the current loop antenna is 1GHz-3GHz, the capacitance of the first capacitor or the second capacitor is set within [0.5pF, 15pF]. When the operating frequency band of the current loop antenna is 3GHz-10GHz, the capacitance of the first capacitor or the second capacitor is set within [1.2pF, 12pF]. When the magnetic current loop antenna is a magnetic current loop monopole antenna or a magnetic current loop dipole antenna, at least one end of the magnetic current loop antenna radiator is provided with a first inductor grounding. When the magnetic current loop antenna is a magnetic current loop slot antenna or a magnetic current loop left-hand antenna, at least one second inductor is arranged in series on the magnetic current loop antenna radiator. Among them, the inductance range of the first inductor and the second inductor is set as follows: when the operating frequency band of the magnetic current loop antenna is 450MHz-1GHz, the inductance of the first inductor or the second inductor is set within [5nH, 47nH]. When the operating frequency band of the magnetic current loop antenna is 1GHz-3GHz, the inductance of the first inductor or the second inductor is set within [1nH, 33nH]. When the operating frequency band of the magnetic flux ring antenna is 3 GHz-10 GHz, the inductance value of the first inductor or the second inductor is set within [0.5 nH, 10 nH].

[0030] Based on this scheme, two schemes for obtaining high-isolation antennas based on different position settings are provided. In this example, the high-isolation antenna system may include at least one current loop antenna or a magnetic current loop antenna, thereby ensuring that the antenna system can provide at least one antenna with good radiation performance for the working frequency band. In addition, based on the position distribution of series or parallel connection (i.e., setting on the same side) and relative setting (i.e., setting on two opposite sides), the two antennas can respectively excite orthogonal currents on the floor, thereby obtaining high isolation characteristics. In addition, in this example, the values ​​of the capacitance or inductance set on the current loop antenna and the magnetic current loop antenna are also limited.

[0031] In one possible design, when the first antenna is a magnetic flux loop antenna, the second antenna is an electric current loop antenna. Based on this solution, the types of antennas included in the antenna system in this application are limited. For example, when one antenna is a magnetic flux loop, the other antenna can be an electric current loop antenna.

[0032] In one possible design, the first antenna and the second antenna are in a direct-fed feeding form, or the first antenna and the second antenna are in a coupled-fed feeding form. Based on this scheme, the feeding form of the antenna included in the antenna system in this application is defined. For example, any antenna in the terminal antenna system can be directly fed or coupled-fed.

[0033] In one possible design, when the first antenna is working, the floor current is excited in a first direction, and when the second antenna is working, the floor current is excited in a second direction, and the first direction and the second direction are orthogonal. Based on this solution, a description is provided of how the solution provided by the present application can obtain high isolation characteristics. Since the two antennas can respectively excite orthogonal (or nearly orthogonal) currents on the floor, the two antennas can obtain a higher degree of isolation.

[0034] In one possible design, the first antenna and the second antenna are arranged on the same side of the electronic device, including: the first antenna and the second antenna are arranged on the first side of the electronic device, and the projections of the first antenna and the second antenna on the first side do not overlap with each other. Based on this scheme, a specific example of the position of serial distribution is provided. In this example, two antennas in a terminal antenna system are taken as an example. The two antennas can be distributed in series on the same side of an electronic device (such as a mobile phone). For example, both antennas are located on the upper side of the mobile phone, distributed along the x-axis, and the projections in the y-direction do not overlap with each other. Thereby achieving serial distribution.

[0035] In a possible design, when the first antenna and the second antenna are in a direct-fed feeding form, the feeding point of the first antenna is set on the first antenna, close to one end of the second antenna. The feeding point of the second antenna is set on the second antenna, close to one end of the first antenna. Alternatively, the feeding point of the first antenna is set on the first antenna, away from one end of the second antenna. The feeding point of the second antenna is set on the second antenna, away from one end of the first antenna. Based on this scheme, a definition of the feeding point in a series distribution case is provided. For example, the feeding points of the two antennas can be set close to each other, and for another example, the feeding points of the two antennas can be set away from each other.

[0036] In a possible design, the terminal antenna system also includes a third antenna, which is also arranged on the first side. The projections of the radiators of the third antenna, the first antenna, and the second antenna in a direction perpendicular to the first direction do not overlap, and the second antenna is arranged between the first antenna and the third antenna. Based on this scheme, a schematic diagram of the series distribution of three antennas is provided. In this example, in addition to the first antenna and the second antenna, a third antenna can also be arranged. For example, the first antenna is arranged on the left part of the top edge of the mobile phone, the second antenna is arranged at the center of the top plate of the mobile phone, and the third antenna is arranged on the right part of the top edge of the mobile phone.

[0037] In a possible design, the first antenna is a magnetic current loop antenna, the second antenna is an electric current loop antenna, and the third antenna is a magnetic current loop antenna. Based on this solution, a type definition of each antenna is provided in a scenario where three antennas are distributed in series.

[0038] In a possible design, the first antenna and the third antenna constitute a first distributed antenna pair, and the first distributed antenna pair includes a first port, and the first port is connected to the port of the first antenna and the port of the third antenna. When the terminal antenna system is working, the first port is used to input equal-amplitude and in-phase feeding signals to the first antenna and the third antenna, respectively. Based on this scheme, an example of the feeding excitation method of each antenna in a series distribution scenario of three antennas is provided. In this example, the first antenna and the third antenna can constitute a distributed antenna pair. The port of the first antenna and the port of the second antenna can be connected to the first port for feeding, and the first antenna and the third antenna are symmetrically fed through the first port. As a result, the floor current excited by the distributed antenna pair formed by the first antenna and the third antenna can be orthogonally distributed with the floor current excited by the second antenna, thereby obtaining high isolation characteristics.

[0039] In a possible design, the first antenna, the second antenna and the third antenna are all current loop antennas. Based on this solution, a type definition for each antenna in a scenario where three antennas are distributed in series is provided.

[0040] In a possible design, the first antenna and the third antenna constitute a second distributed antenna pair, and the second distributed antenna pair includes a second port, and the second port is connected to the port of the first antenna and the port of the third antenna. When the terminal antenna system is working, the first port is used to input equal-amplitude and anti-phase feeding signals to the first antenna and the third antenna, respectively. The current direction of the second distributed antenna pair exciting the floor is orthogonal to the current direction of the second antenna exciting the floor. Based on this scheme, the first antenna and the third antenna (i.e., the left and right current loop antennas) can be fed antisymmetrically, so that the floor current excited by the distributed antenna pair composed of the first antenna and the third antenna can be distributed orthogonally to the floor current excited by the second antenna, thereby obtaining high isolation characteristics.

[0041] In one possible design, the first antenna and the second antenna are arranged on the same side of the electronic device, including: the first antenna and the second antenna are arranged on the first side of the electronic device, and the projections of the first antenna and the second antenna on the first side overlap at least partially. Based on this scheme, a specific example of parallel distribution positions is provided. In this example, two antennas in a terminal antenna system are taken as an example. The two antennas can be distributed in parallel on the same side of an electronic device (such as a mobile phone). For example, both antennas are located on the upper side of the mobile phone, distributed along the x-axis, and the projections in the y-direction overlap at least partially. Thus, parallel distribution is achieved.

[0042] In a possible design, the planes where the radiators of the first antenna and the second antenna are located are orthogonal. Based on this solution, a specific parallel distribution implementation is provided. For example, the first antenna can be located in the xoz plane, and the second antenna can be located in the xoy plane. The projections on the x-axis have at least partial overlap.

[0043] In a possible design, when the first antenna is a current loop antenna, the second antenna is any one of the following antennas: a magnetic current loop antenna, a CM wire antenna, and a DM slot antenna. Based on this solution, a type definition of two antennas in a parallel distribution scenario is provided. It can be understood that the current loop antenna can excite transverse currents, and the magnetic current loop antenna, the CM wire antenna, and the DM slot antenna can excite longitudinal currents, thereby enabling the first antenna and the second antenna to have high isolation characteristics.

[0044] In one possible design, the first antenna and the second antenna are arranged on two opposite sides of the electronic device, including: the first antenna is arranged at a first position on the first side of the electronic device, the second antenna is arranged at a second position on the second side of the electronic device, and the first side and the second side are respectively adjacent to the third side of the electronic device. Based on this scheme, a specific example of relative distribution positions is provided. In this example, two antennas in a terminal antenna system are taken as an example. The two antennas can be arranged on two opposite sides of an electronic device (such as a mobile phone). For example, the first antenna is located on the left long side of the mobile phone, and the second antenna is located on the right long side of the mobile phone.

[0045] In a possible design, the first position and the second position are axially symmetrical about the midline of the third side. Based on this solution, a definition of the relative position relationship between the first antenna and the second antenna is provided. For example, the positions of the first antenna and the second antenna can be axially symmetrical relative to the midline of the upper side of the mobile phone. In this way, the first antenna and the second antenna can be located at the upper end, the middle, or the lower end of the left long side and the right long side, respectively.

[0046] In a possible design, the first position is located in the middle of the first side, and the second position is located in the middle of the second side. Based on this solution, a specific position definition of the first antenna and the second antenna is provided. For example, the first antenna can be located in the middle of the left long side, and the second antenna can be located in the middle of the right long side.

[0047] In a possible design, when the first antenna and the second antenna are in a direct-fed feeding form, the feeding point of the first antenna is set on the radiator of the first antenna, the feeding point of the second antenna is set on the radiator of the second antenna, and the feeding point of the first antenna and the feeding point of the second antenna are respectively set on the same side of the radiator of the first antenna and the radiator of the second antenna. Based on this scheme, examples of the positions of the feeding points of the direct-fed antennas in parallel distribution and relative distribution scenarios are provided. For example, in the case where the two antennas are distributed in parallel on the upper side, the feeding points of the two antennas can be both set at the left end of their respective radiators, or both set at the right end of their respective radiators. For another example, in the case where the two antennas are relatively distributed on the left and right sides, the feeding points of the direct-fed antennas can be both set at the upper end of their respective radiators, or both set at the lower end of their respective radiators.

[0048] In a third aspect, an electronic device is provided, wherein the electronic device is provided with a terminal antenna system as described in the first aspect and any possible design thereof. When the electronic device transmits or receives a signal, the terminal antenna system transmits or receives the signal.

[0049] It should be understood that the technical solutions provided in the second and third aspects above and their technical features can all correspond to the terminal antenna system provided in the first aspect and its possible designs, so the beneficial effects that can be achieved are similar and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a schematic diagram of a multi-antenna scenario;

[0051] Figure 2 A schematic diagram of stacking an electronic device provided in an embodiment of the present application;

[0052] Figure 3 A schematic diagram of an antenna arrangement on a metal casing provided in an embodiment of the present application;

[0053] Figure 4 A schematic diagram of the composition of an electronic device provided in an embodiment of the present application;

[0054] Figure 5 A schematic diagram of the operation of a current loop antenna provided in an embodiment of the present application;

[0055] Figure 6 A schematic diagram of the composition of a current loop antenna provided in an embodiment of the present application;

[0056] Figure 7 A schematic diagram of a coupled-fed current loop antenna provided in an embodiment of the present application;

[0057] Figure 8 A schematic diagram of the operation of a magnetic current ring antenna provided in an embodiment of the present application;

[0058] Fig. 9 A schematic diagram of the composition of a magnetic current ring antenna provided in an embodiment of the present application;

[0059] Fig.10 A schematic diagram of a coupled-fed magnetic current ring antenna provided in an embodiment of the present application;

[0060] Fig.11 A schematic diagram of the positions of a pair of antennas distributed in series provided in an embodiment of the present application;

[0061] Fig.12 A schematic diagram of the positions of a pair of antennas distributed in parallel provided in an embodiment of the present application;

[0062] Fig.13A A schematic diagram of the positions of relatively distributed antenna pairs provided in an embodiment of the present application;

[0063] Fig. 13B A schematic diagram of the positions of an orthogonally distributed antenna pair provided in an embodiment of the present application;

[0064] Fig. 13C A schematic diagram of the structure of a CM antenna and a DM antenna provided in an embodiment of the present application;

[0065] Fig.14 An orthogonal schematic diagram of a floor current provided in an embodiment of the present application;

[0066] Fig.15 A schematic diagram of floor current distribution provided in an embodiment of the present application;

[0067] Fig.16 A schematic diagram of floor electric field distribution provided in an embodiment of the present application;

[0068] Fig.17A A schematic diagram of a series-connected antenna pair provided in an embodiment of the present application;

[0069] Fig. 17B A schematic diagram of a magnetic current ring antenna exciting a floor current provided in an embodiment of the present application;

[0070] Fig.18 A schematic diagram of floor current of a series-connected antenna pair provided in an embodiment of the present application;

[0071] Fig.19 A schematic diagram of a directional diagram of a series-connected antenna pair provided in an embodiment of the present application;

[0072] Fig. 20 A schematic diagram of S parameters of a series-connected antenna pair provided in an embodiment of the present application;

[0073] Fig.21 A schematic diagram of the efficiency of a series-connected antenna pair provided in an embodiment of the present application;

[0074] Fig.22A A schematic diagram of another antenna pair connected in series provided in an embodiment of the present application;

[0075] Fig. 22B A schematic diagram of an antenna group of three antennas connected in series provided in an embodiment of the present application;

[0076] Fig. 22C A schematic diagram of a directional diagram of a series-connected antenna group provided in an embodiment of the present application;

[0077] Fig.22D A schematic diagram of the isolation of a series-connected antenna group provided in an embodiment of the present application;

[0078] Fig.22E A schematic diagram of the composition of a series-connected antenna group provided in an embodiment of the present application;

[0079] Fig.22FA schematic diagram of a directional diagram of a series-connected antenna group provided in an embodiment of the present application;

[0080] Fig.23A A schematic diagram of a parallel antenna pair provided in an embodiment of the present application;

[0081] Fig. 23B A schematic diagram of a structure implementation of a parallel antenna pair provided in an embodiment of the present application;

[0082] Fig.24 A schematic diagram of current flow of a pair of parallel antennas provided in an embodiment of the present application;

[0083] Fig.25 A schematic diagram of a directional diagram of a parallel antenna pair provided in an embodiment of the present application;

[0084] Fig.26 A schematic diagram of S parameters of a parallel antenna pair provided in an embodiment of the present application;

[0085] Fig. 27 A schematic diagram of the efficiency of a parallel antenna pair provided in an embodiment of the present application;

[0086] Fig.28 A schematic diagram of a parallel antenna pair provided in an embodiment of the present application;

[0087] Fig.29 A schematic diagram of a directional diagram of a parallel antenna pair provided in an embodiment of the present application;

[0088] Fig.30 A schematic diagram of S parameters of a parallel antenna pair provided in an embodiment of the present application;

[0089] Fig.31 A schematic diagram of the efficiency of a parallel antenna pair provided in an embodiment of the present application;

[0090] Fig.32 A schematic diagram of a parallel antenna pair provided in an embodiment of the present application;

[0091] Fig.33 A schematic diagram of current flow of a pair of parallel antennas provided in an embodiment of the present application;

[0092] Fig.34 A schematic diagram of a directional diagram of a parallel antenna pair provided in an embodiment of the present application;

[0093] Fig.35 A schematic diagram of S parameters of a parallel antenna pair provided in an embodiment of the present application;

[0094] Fig.36 A schematic diagram of the efficiency of a parallel antenna pair provided in an embodiment of the present application;

[0095] Fig.37 A schematic diagram of a parallel antenna pair provided in an embodiment of the present application;

[0096] Fig.38 A schematic diagram of a directional diagram of a parallel antenna pair provided in an embodiment of the present application;

[0097] Fig.39 A schematic diagram of S parameters of a parallel antenna pair provided in an embodiment of the present application;

[0098] Fig.40 A schematic diagram of the efficiency of a parallel antenna pair provided in an embodiment of the present application;

[0099] Fig.41 A schematic diagram of a parallel antenna pair provided in an embodiment of the present application;

[0100] Fig.42 A schematic diagram of a pair of relative antennas provided in an embodiment of the present application;

[0101] Fig.43 A specific example diagram of a relative antenna pair provided in an embodiment of the present application;

[0102] Fig.44 A schematic diagram of current flow of a relative antenna pair provided in an embodiment of the present application;

[0103] Fig.45A A schematic diagram of current simulation of a relative antenna pair provided in an embodiment of the present application;

[0104] Fig.45B A schematic diagram of current simulation of a relative antenna pair provided in an embodiment of the present application;

[0105] Fig.45C A schematic diagram of a directional diagram of a relative antenna pair provided in an embodiment of the present application;

[0106] Fig.46 A schematic diagram of S parameters of a relative antenna pair provided in an embodiment of the present application;

[0107] Fig.47 A schematic diagram of an orthogonal antenna pair provided in an embodiment of the present application;

[0108] Fig.48 A schematic diagram of a directional diagram of an orthogonal antenna pair provided in an embodiment of the present application;

[0109] Fig.49 A schematic diagram of S parameters of an orthogonal antenna pair provided in an embodiment of the present application;

[0110] Fig.50A schematic diagram of an orthogonal antenna pair provided in an embodiment of the present application;

[0111] Fig.51 A schematic diagram of a directional diagram of an orthogonal antenna pair provided in an embodiment of the present application;

[0112] Fig.52 A schematic diagram of S parameters of an orthogonal antenna pair provided in an embodiment of the present application;

[0113] Fig.53A A schematic diagram of an orthogonal three-antenna antenna group provided in an embodiment of the present application;

[0114] Fig.53B A schematic diagram of current flow directions of an antenna group of three orthogonal antennas provided in an embodiment of the present application;

[0115] Fig.54 A schematic diagram of a directional diagram of an antenna group of three orthogonal antennas provided in an embodiment of the present application;

[0116] Fig.55 A schematic diagram of S parameters of an antenna group of three orthogonal antennas provided in an embodiment of the present application;

[0117] Fig.56 A schematic diagram of a directional diagram of an antenna group of three orthogonal antennas provided in an embodiment of the present application;

[0118] Fig.57 A schematic diagram of S parameters of an antenna group of three orthogonal antennas provided in an embodiment of the present application;

[0119] Fig.58A A schematic diagram of an orthogonal three-antenna antenna group provided in an embodiment of the present application;

[0120] Fig.58B A schematic diagram of current simulation of an antenna group of three orthogonal antennas provided in an embodiment of the present application;

[0121] Fig.59 A schematic diagram of a directional diagram of an antenna group of three orthogonal antennas provided in an embodiment of the present application;

[0122] Fig.60 A schematic diagram of S parameters of an antenna group of three orthogonal antennas provided in an embodiment of the present application;

[0123] Fig.61 A schematic diagram of an orthogonal three-antenna antenna group provided in an embodiment of the present application;

[0124] Fig.62 A schematic diagram of a directional diagram of an antenna group of three orthogonal antennas provided in an embodiment of the present application;

[0125] Fig.63 A schematic diagram of S parameters of an antenna group of three orthogonal antennas provided in an embodiment of the present application;

[0126] Fig.64 A schematic diagram of a directional diagram of an antenna group of three orthogonal antennas provided in an embodiment of the present application;

[0127] Fig.65 A schematic diagram of S parameters of an antenna group of three orthogonal antennas provided in an embodiment of the present application. DETAILED DESCRIPTION

[0128] With the development of wireless communication technology, multiple antennas are usually required in electronic devices to meet the requirements of wireless communication functions of electronic devices. The working frequency bands of some antennas can partially overlap or completely overlap, thereby improving the communication capabilities of the corresponding frequency bands.

[0129] For example, combining Figure 1 , take the example that the antennas provided in the electronic device include E1 and E2, and the working frequency bands of E1 and E2 overlap. When the electronic device uses the working frequency bands corresponding to E1 and E2 for wireless communication, E1 and E2 may work at the same time. Exemplarily, when E1 is working, it can transmit the signal of the electronic device in the form of electromagnetic waves, and the resonant frequency corresponding to the electromagnetic wave can be included in the working frequency band of E1, thereby realizing the transmission of the signal. E2 can convert the electromagnetic waves in the external space into signals (such as analog signals) that can be processed by the electronic device, thereby realizing the reception of the signal.

[0130] It is understandable that since E1 and E2 work in the same frequency band, the signal received by E2 may include the signal sent by E1. This part of the signal is obviously not needed by the electronic device, so it is an invalid signal for the work of E2. In other words, when E1 and E2 work at the same time, the two antennas may affect each other, thereby reducing the wireless communication efficiency of the antenna.

[0131] In the above example, the scenario of E1 transmitting and E2 receiving is taken as an example. In other scenarios, similar problems may also exist, reducing the wireless communication efficiency of the antenna. For example, in the scenario of E1 receiving and E2 transmitting, the same problem will also occur due to a similar mechanism. In addition, when the operating frequency bands of E1 and E2 are different, taking the operating frequency band of E1 as an example, which is lower than the operating frequency band of E2, although the operating frequency band of E1 does not overlap with that of E2, the corresponding resonant frequency doubling when E1 is working may also affect the work of E2.

[0132] In order to solve the problem of mutual influence in multi-antenna scenarios, the influence between antennas can be reduced by improving the isolation between antennas. The better the isolation between antennas, the smaller the mutual influence between antennas. Among them, the isolation can be identified by a normalized value. For example, taking the dual-port isolation as an example, the isolation can be identified by S21 (or S12) in the S parameter, and the value of S21 at different frequencies corresponds to the isolation of the dual ports at the current frequency. After normalization, the maximum isolation value does not exceed 0. The larger the absolute value of the isolation, the better the isolation and the smaller the influence between antennas. Correspondingly, the smaller the absolute value of the isolation, the worse the isolation and the greater the influence between antennas. For the sake of convenience, in the following examples, the absolute value of the isolation is referred to as isolation. For example, the absolute value of the isolation is large, which is referred to as large isolation. For another example, the absolute value of the isolation is small, which is referred to as small isolation.

[0133] It should be understood that the strength of the antenna radiation performance will also affect the isolation between antennas. Figure 1 In the example shown, when E1 and E2 have mutual influence, without considering other influences, the better the radiation performance of the antenna, the smaller the isolation between the antennas and the greater the mutual influence. For example, the better the radiation performance of E1, the worse the isolation with E2 will be in the frequency point or frequency band with better radiation performance. However, in order to ensure the wireless communication function of the electronic device, the antenna needs to provide better radiation performance. In other words, the antenna in the electronic device needs to provide both good radiation performance and good isolation between the antennas. This also creates higher requirements for the design of multiple antennas in electronic devices.

[0134] In order to solve the above problems, the embodiment of the present application provides a high isolation antenna solution, which enables the antenna to have good isolation while providing good radiation performance. It should be noted that the radiation performance involved in the embodiment of the present application may refer to the radiation efficiency and / or system efficiency of the corresponding antenna. Among them, the radiation efficiency can be used to identify the maximum radiation capability of the antenna system, and the system efficiency is used to identify the efficiency that the antenna can provide under the current environment and port matching.

[0135] The following first describes the implementation scenario of the high isolation antenna solution provided in the embodiment of the present application.

[0136] The antenna scheme provided in the embodiment of the present application can be applied to the user's electronic device to support the wireless communication function of the electronic device. For example, the electronic device can be a portable mobile device such as a mobile phone, a tablet computer, a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, a media player, etc. The electronic device can also be a wearable electronic device such as a smart watch. The embodiment of the present application does not impose any special restrictions on the specific form of the device.

[0137] Please refer to Figure 2 , is a schematic diagram of the structure of an electronic device 200 provided in an embodiment of the present application. Figure 2 As shown, the electronic device 200 provided in the embodiment of the present application can be provided with a screen and cover 201, a metal shell 202, an internal structure 203, and a back cover 204 in order from top to bottom along the z-axis.

[0138] Among them, the screen and cover 201 can be used to realize the display function of the electronic device 200. The metal shell 202 can serve as the main frame of the electronic device 200 to provide rigid support for the electronic device 200. The internal structure 203 may include a collection of electronic components and mechanical components that realize various functions of the electronic device 200. For example, the internal structure 203 may include a shielding cover, screws, reinforcing ribs, etc. The back cover 204 can be the back appearance surface of the electronic device 200, and the back cover 204 can use glass materials, ceramic materials, plastics, etc. in different implementations.

[0139] The antenna solution provided in the embodiment of the present application can be applied in Figure 2 In the electronic device 200 shown, it is used to support the wireless communication function of the electronic device 200. In some embodiments, the antenna involved in the antenna solution can be set on the metal shell 202 of the electronic device 200. In other embodiments, the antenna involved in the antenna solution can be set on the back cover 204 of the electronic device 200, etc.

[0140] As an example, taking the metal housing 202 having a metal frame structure as an example, Figure 3 FIG. 2 shows a schematic diagram of the composition of a metal housing 202. In this example, the metal housing 202 can be made of metal material, such as aluminum alloy. Figure 3 As shown, a reference ground may be provided on the metal housing 202. The reference ground may be a metal material with a large area, which is used to provide most of the rigid support and provide a zero potential reference for each electronic component. Figure 3In the example shown, a metal frame may be provided around the reference ground. The metal frame may be a complete closed metal frame, and the metal frame may include a metal strip partially or completely suspended. In other implementations, the metal frame may also be Figure 3 A metal frame interrupted by one or more gaps as shown. Figure 3 In the example, gaps 1, 2 and 3 can be set at different positions on the metal frame. These gaps can interrupt the metal frame to obtain independent metal branches. In some embodiments, some or all of these metal branches can be used as radiating branches of the antenna, thereby realizing structural reuse during the antenna setting process and reducing the difficulty of antenna setting. When the metal branches are used as radiating branches of the antenna, the positions of the gaps set at one or both ends of the metal branches can be flexibly selected according to the setting of the antenna.

[0141] In such Figure 3 In the examples shown, one or more metal pins may be provided on the metal frame. In some examples, the metal pins may be provided with screw holes for fixing other structural members by screws. In other examples, the metal pins may be coupled to the feeding points so that when the metal branches connected to the metal pins are used as the radiating branches of the antenna, the antenna is fed through the metal pins. In other examples, the metal pins may also be coupled to other electronic components to achieve corresponding electrical connection functions.

[0142] In this example, a schematic diagram of the arrangement of a printed circuit board (PCB) on a metal housing is also shown. The main board and sub-board design are taken as an example. In other examples, the main board and sub-board can also be connected, such as an L-shaped PCB design. In some embodiments of the present application, the main board (such as PCB1) can be used to carry electronic components that implement various functions of the electronic device 200. For example, a processor, a memory, a radio frequency module, etc. A sub-board (such as PCB2) can also be used to carry electronic components. For example, a universal serial bus (USB) interface and related circuits, a speak box, etc. For another example, the sub-board can also be used to carry a radio frequency circuit corresponding to an antenna arranged at the bottom (i.e., the negative y-axis portion of the electronic device).

[0143] The antenna solutions provided in the embodiments of the present application can be applied to Figure 2 or Figure 3 In an electronic device composed as shown.

[0144] It should be noted that the electronic device 200 in the above example is only one possible composition. In other embodiments of the present application, the electronic device 200 may also have other logical compositions. For example, in order to realize the wireless communication function of the electronic device 200, the electronic device may be provided with the following components: Figure 4 The communication module shown. The communication module may include an antenna, a radio frequency module for performing signal interaction with the antenna, and a processor for performing signal interaction with the radio frequency module. Exemplarily, the signal interaction between the radio frequency module and the antenna may be an interaction of analog signals. The signal interaction between the radio frequency module and the processor may be an analog signal or a digital signal. In some implementations, the processor may be a baseband processor.

[0145] In this example, there may be multiple antennas provided in the electronic device, such as Figure 4 The antennas 1 to n are shown. Among these n antennas, one or more magnetic current loop antennas and / or electric current loop antennas may be included.

[0146] The following first briefly describes the magnetic current loop antenna and the current loop antenna in conjunction with the accompanying drawings.

[0147] For example, the current loop antenna involved in the solution provided in the embodiment of the present application can have the following characteristics when working: Figure 5 In the embodiment of the present application, there is a current and magnetic field distribution as shown. Figure 5 The radiation characteristics of the current distribution and / or magnetic field distribution shown may also be referred to as current loop radiation characteristics.

[0148] like Figure 5 As shown, when the antenna is radiating, a unidirectional current is formed on the radiating branch. The direction of the current on the radiating branch of the current loop antenna is opposite to the direction of the current on the floor serving as the reference ground (such as the floor close to the edge of the current loop antenna); thereby forming a current loop consisting of the radiating branch and the floor. The current loop forms a magnetic field perpendicular to the paper and outward between the radiating branch of the antenna and the reference ground. By connecting a capacitor in parallel to the ground at the end of the radiating branch, a uniform magnetic field distribution is formed, thereby achieving radiation with the radiation characteristics of the current loop antenna, and the radio frequency energy is coupled to the reference ground floor of the electronic device through the magnetic field. In some embodiments, the above-mentioned current loop radiation characteristics can be obtained by setting series and / or parallel capacitors on the radiating branch. For example, in combination with Figure 5 , a capacitor can be set at position 1. It should be understood that the energy storage characteristics of the capacitor for electric energy can make the change of the current on the radiation branch tend to be gentle, and the magnetic field corresponds to the current, so the magnetic field in the area near the radiation branch (such as the area between the radiation branch and the reference ground) can be made to change smoothly, thereby obtaining a more evenly distributed magnetic field.

[0149] In a preferred embodiment, a dielectric material is provided between the antenna radiating branch and the reference ground. Figure 5 The electromagnetic field formed by the current loop antenna shown between the antenna radiation branch and the reference ground is mainly dominated by a uniform magnetic field, and the magnetic field coupling energy loss is zero when passing through the dielectric material, that is, the dielectric material has no loss effect on the formed uniform magnetic field. Therefore, the current loop antenna has better radiation performance when radiating than the prior art.

[0150] Through experimental verification, the current loop antenna with uniform magnetic field distribution can provide better radiation performance under the same spatial conditions, such as better radiation efficiency, system efficiency, bandwidth, etc.

[0151] As an example, Figure 6 Several possible implementations of the current loop antenna are shown. It should be noted that in different implementations of the present application, the current loop antenna can be divided into a current loop wire antenna and a current loop slot antenna according to the differences in the composition structure of the current loop antenna. Among them, the current loop wire antenna can include a current loop monopole antenna, a current loop dipole antenna, etc. The current loop slot antenna can include a current loop left-hand antenna, a current loop slot antenna, etc.

[0152] A first capacitor connected in parallel may be provided on the current loop antenna, thereby achieving the following Figure 5 In some implementations, one or more capacitors may be connected in series to the radiator of the current loop antenna to improve the radiation performance of the current loop antenna.

[0153] Corresponding to the current loop line antenna, a second capacitor connected in series may be provided on the current loop slot antenna, thereby achieving the following Figure 5 In some implementations, more capacitors can be connected in series to the radiator of the current loop slot antenna to improve the radiation performance of the current loop antenna.

[0154] It can be seen that both the current loop slot antenna and the current loop wire antenna are provided with a capacitor grounded at at least one end of the radiator of the current loop antenna. In the embodiment of the present application, when the current loop antenna operates in different frequency bands, the size of the capacitor grounded at the end can be different.

[0155] For example, when the operating frequency band of the current loop antenna is low frequency (Low Band, LB), the sizes of the capacitors C1 and C2 set at the ends of the radiating branches can be included within [1.5pF, 15pF]. When the operating frequency band of the current loop antenna is mid-frequency (Mid Band, MB), the sizes of the capacitors C1 and C2 set at the ends of the radiating branches can be included within [0.5pF, 15pF]. When the operating frequency band of the current loop antenna is high frequency (High Band, HB), the sizes of the capacitors C1 and C2 set at the ends of the radiating branches can be included within [1.2pF, 12pF].

[0156] In an embodiment of the present application, the working frequency band covered by the antenna pair may include low frequency, medium frequency, and / or high frequency. In some embodiments, the low frequency may include a frequency band range of 450M-1GHz. The medium frequency may include a frequency band range of 1G-3GHz. The high frequency may include a frequency band range of 3GHz-10GHz. It is understood that in different embodiments, the low, medium and high frequency bands may include but are not limited to Bluetooth (BT) communication technology, global positioning system (GPS) communication technology, wireless fidelity (Wi-Fi) communication technology, global system for mobile communications (GSM) communication technology, wideband code division multiple access (WCDMA) communication technology, long term evolution (LTE) communication technology, 5G communication technology, SUB-6G communication technology and other future communication technologies. The working frequency band required. In some implementations, the LB, MB and HB can include common frequency bands such as 5G NR, WiFi 6E, UWB, etc.

[0157] The following describes different components of the current loop antenna with reference to specific examples.

[0158] Figure 6 (a) in the figure shows a schematic diagram of a current loop monopole antenna. The current loop monopole antenna may include a radiator B1. When the current loop monopole antenna operates in a fundamental mode (such as a 1 / 4 wavelength mode), the length of the radiator B1 may correspond to 1 / 4 of the antenna's operating wavelength. For example, the length of B1 may be less than 1 / 4 of the operating wavelength. One end of B1 is electrically connected to a feeding point, and the other end of B1 is connected to a capacitor (such as a capacitor C M1 ) is grounded, thus forming a current loop monopole antenna.

[0159] Figure 6 (b) shows a schematic diagram of a current loop dipole antenna. The current loop dipole antenna may include radiators B2 and B3. B2 and B3 may be connected via a feeding point, and the end of B2 away from B3 may be connected via a capacitor C D1 The end of B3 away from B2 can be grounded through capacitor C D2 Ground. When the current loop dipole antenna operates in the fundamental mode (such as the 1 / 4 wavelength mode), the length of the radiator B2 and the length of B3 may correspond to 1 / 4 of the working wavelength respectively, that is, the length of the radiating branch (such as B2 plus B3) of the current loop dipole antenna corresponds to 1 / 2 of the working wavelength. For example, the length of B2 may be less than 1 / 4 of the working wavelength. For another example, the length of B3 may be less than 1 / 4 of the working wavelength. That is to say, the length of the radiating branch (such as B2 plus B3) of the current loop dipole antenna may be less than 1 / 2 of the working wavelength. In some embodiments, the sum of the lengths of B2 and B3 may be greater than 1 / 4 of the working wavelength and less than 1 / 2 of the working wavelength.

[0160] Figure 6 (c) in FIG. 1 shows a schematic diagram of a current loop left-hand antenna. The current loop left-hand antenna may include a radiator B4. A capacitor C may be connected in series to B4. C1 . One end of B4 can be grounded, and the other end can be connected to the left-hand feed. In this example, the left-hand feed may include a feed point, and a left-hand capacitor connected in series with the feed point. The left-hand capacitor can be used to stimulate the generation of a left-hand mode on B4. The structure and working mechanism of the left-hand antenna can be referred to CN201380008276.8 and CN201410109571.9, which will not be repeated here.

[0161] Figure 6 (d) in FIG. 1 shows a schematic diagram of a current loop slot antenna. The current loop slot antenna may include radiators B5 and B6. Radiators B5 and B6 are connected via a feeding point. The end of B5 away from B6 and the end of B6 away from B5 may be grounded respectively. Thus, B5, B6 and the reference ground may form a slot for radiation. In this example, a capacitor C may be connected in series to B5. S1 , capacitor C can be connected in series with B6 S2 .

[0162] In such Figure 6 In the examples shown, the feeding is performed by direct feeding as an example. In some other implementations of the present application, the current loop antenna can also be excited by coupled feeding. For example, Figure 7 A schematic diagram of a coupled-fed current loop monopole antenna is shown.

[0163] like Figure 7As shown, the current loop monopole antenna may include a radiating branch and a feeding branch. The radiating branch may include a radiator B12, and the two ends of B12 are connected through capacitors C CM1 and C CM2 The feeding branch can be used for coupled feeding, and the feeding branch can include a first feeding part CB12 and a second feeding part CB13, CB13 and CB12 are connected through a feeding point, and the other ends of CB12 and CB13 are both grounded. The feeding branch can be arranged between the radiation branch and the reference ground. Thus, the radiation branch is stimulated by the feeding branches CB12 and CB13 to radiate with the current loop radiation characteristics.

[0164] It should be understood that for other current loop antennas, excitation can also be performed in the form of coupled feeding. The structure of the feeding branch can also be various. For details, please refer to the following patent applications: Application No. 202110961752.4, Application No. 202110963510.9, Application No. 202110961755.8, and Application No. 202110962491.8. No further details will be given here.

[0165] Above Figure 5 , Figure 6 as well as Figure 7 The current loop antenna is described as an example. Figure 8 as well as Fig. 9 A brief description of the magnetic flux ring antenna is given.

[0166] Exemplary, combined Figure 8 , provides a schematic diagram of a magnetic flux ring antenna. Figure 8 As shown, the magnetic flux loop antenna may include at least one radiating branch. The radiating branch may be used to radiate with the radiation characteristics of the magnetic flux loop antenna. Among them, the radiation characteristics of the magnetic flux loop antenna described in the embodiment of the present application may include: generating a uniform electric field distribution between the radiating branch and the reference ground. For example, Figure 8 As shown, a uniform electric field pointing downward may be distributed between the antenna radiation branch and the reference ground. Of course, in other scenarios, due to the continuous change of the feeding signal, the electric field may also be uniformly distributed upward.

[0167] As a possible implementation, the magnetic flux ring antenna provided in the embodiment of the present application can be based on the existing electric field type antenna, and the inductor can be connected in series and / or in parallel on the radiating branch, so that the position with higher potential on the radiator can be returned to the ground nearby through the inductor, thereby reducing the potential of this part, and then pulling down the electric field near the high potential; correspondingly, by setting the energy storage characteristics of the inductor for magnetic energy, the electric field change in the area with lower electric field and the current change have a time difference, and then when the current is enhanced according to the current provided by the feeding point, the electric field in the original low electric field area can be rapidly enhanced, while the electric field in the original high electric field area still maintains a high electric field for a period of time. In this way, a uniformly distributed electric field near the radiating branch is obtained.

[0168] It should be understood that, in the case of uniformly distributed electric field characteristics, a magnetic flux loop with closed characteristics can be formed in the space near the radiation branch. That is to say, the radiation characteristics of the magnetic flux loop antenna involved in the embodiment of the present application may also include: generating a closed magnetic flux loop distribution near the radiation branch. For example, Figure 8 As shown, a closed magnetic flux loop in the counterclockwise direction can be formed near the antenna radiation branch. Similar to the above description of the electric field distribution, in other scenarios, since the feed signal is constantly changing, the magnetic flux loop can also be distributed in a clockwise closed direction.

[0169] Based on the above description of the characteristics of the magnetic current loop antenna during its operation provided in the embodiment of the present application (such as the radiation characteristics of the magnetic current loop antenna), since the magnetic current loop antenna provided in the embodiment of the present application can generate a uniform electric field (or a closed magnetic current loop) for radiation during operation, combined with the above description, the magnetic current loop antenna can provide better radiation performance than the general electric field type antenna with an uneven electric field.

[0170] In a preferred embodiment, a magnetic dielectric material is arranged between the antenna radiation branch and the reference ground. Figure 8 The electromagnetic field formed by the magnetic flux ring antenna shown between the antenna radiation branch and the reference ground is mainly composed of a uniform electric field. The radio frequency energy is coupled to the floor where the reference ground of the electronic equipment is located through the electric field, and the electric field coupling energy has zero loss when passing through the magnetic dielectric material, that is, the magnetic dielectric material has no loss effect on the formed uniform electric field. Therefore, the magnetic flux ring antenna has better radiation performance when radiating than the existing electric field type antenna with non-uniform electric field.

[0171] It should be noted that in different implementations of the present application, the magnetic flux ring antenna can be divided into a magnetic flux ring line antenna and a magnetic flux ring slot antenna according to the differences in the composition structure of the magnetic flux ring antenna. Among them, the magnetic flux ring line antenna can include a magnetic flux ring monopole antenna, a magnetic flux ring dipole antenna, etc. The magnetic flux ring slot antenna can include a magnetic flux ring left-hand antenna, a magnetic flux ring slot antenna, etc.

[0172] A first inductor connected in parallel may be provided on the magnetic current loop antenna, thereby achieving the following Figure 8 In some implementations, one or more inductors may be connected in series to the radiator of the magnetic current loop antenna, thereby improving the radiation performance of the magnetic current loop antenna.

[0173] Corresponding to the magnetic current loop wire antenna, a second inductor connected in series may be provided on the magnetic current loop slot antenna, thereby achieving the following Figure 8 In some implementations, more inductors can be connected in series to the radiator of the magnetic current loop antenna to improve the radiation performance of the magnetic current loop antenna.

[0174] It can be seen that both the magnetic current loop slot antenna and the magnetic current loop wire antenna are provided with an inductor grounding at at least one end of the radiator of the magnetic current loop antenna. In the embodiment of the present application, when the magnetic current loop antenna operates in different frequency bands, the inductance of the grounding at the end can be different.

[0175] For example, when the magnetic current loop antenna works in LB, the inductance value of the inductor can be in the range of 5nH to 47nH. When the magnetic current loop antenna works in MB, the inductance value of the inductor can be in the range of 1nH to 33nH. When the magnetic current loop antenna works in HB, the inductance value of the inductor can be in the range of 0.5nH to 10nH.

[0176] Fig. 9 Schematics of several possible magnetic flux ring antennas are shown.

[0177] Fig. 9 (a) shows a magnetic flux ring monopole antenna. The magnetic flux ring monopole antenna may include a radiator B1, one end of which may be connected to the antenna by an inductor L M1 The other end of B1 can be connected to the feed point. When the antenna works in the fundamental mode, the length of B1 can be related to 1 / 4 of the working wavelength. For example, the length of B1 can be less than 1 / 4 of the working wavelength.

[0178] Fig. 9 (b) shows a magnetic flux ring dipole antenna. The magnetic flux ring dipole antenna may include radiators B2 and B3. B2 may be connected to B3 via a feeding point. The end of B2 away from B3 may be connected via an inductor L D1 The end of B3 away from B2 can be grounded through the inductor L D2Ground. In some embodiments, the settings of B2 and B3 can be symmetrical about the feeding point. When the antenna operates in the fundamental mode, the length of B2 (or B3) can be related to 1 / 4 of the working wavelength. For example, the length of B2 can be less than 1 / 4 of the working wavelength. For another example, the length of B3 can be less than 1 / 4 of the working wavelength. For another example, the length of the radiation branch of the antenna composed of B2 and B3 can be less than 1 / 2 of the working wavelength and greater than 1 / 4 of the working wavelength.

[0179] Fig. 9 (c) in FIG. 1 shows a magnetic flux loop left-hand antenna. The magnetic flux loop left-hand antenna may include a radiator B4. One end of B4 may be grounded, and the other end may be connected to a left-hand feed. The form of the left-hand feed may refer to FIG. Figure 6 Left-hand feed shown. An inductor L can be connected in series with B4 C1 .

[0180] Fig. 9 (d) in FIG. 1 shows a magnetic flux ring slot antenna. The magnetic flux ring slot antenna may include radiators B5 and B6. B5 and B6 may be connected via a feeding point. The end of B5 away from B6 may be grounded, and the end of B6 away from B5 may be grounded. In this way, B5 and B6 and the reference ground may form a slot for radiation. In this example, an inductor L may be connected in series with B5. S1 , B6 can be connected in series with an inductor L S2 .

[0181] exist Fig. 9 In the example, the excitation is performed by direct feeding. In other embodiments of the present application, the magnetic flux ring antenna can also be excited by coupling feeding. Fig.10 FIG. 1 shows a schematic diagram of a coupled-fed magnetic flux ring monopole antenna. Fig.10 As shown, both ends of the radiator B11 of the antenna can be connected by an inductor (such as L CM1 and L CM2 ) is grounded. A feeding branch CB11 can be arranged between the radiating branch and the reference ground, and the two ends of the CB11 can be suspended, and the CB11 can be connected to a feeding point, for example, the feeding point can be arranged at the center of the CB11. In this way, the magnetic flux ring antenna can be excited so that B11 radiates with the characteristics of magnetic flux ring radiation. It should be understood that for other magnetic flux ring antennas, excitation can also be carried out in the form of coupled feeding. The structure of the feeding branch can also be various. For details, please refer to the following patent applications: Application No. 202111034604.4, Application No. 202111034603.X, Application No. 202111034611.4, and Application No. 202111033384.3. I will not go into details here.

[0182] In the high isolation antenna solution provided in the embodiment of the present application, in an antenna system including multiple antennas, the current loop antenna and / or magnetic current loop antenna provided in the above example, and / or existing antennas can be used to form an antenna pair, and the antenna pair can have a high degree of isolation. At the same time, due to the good radiation performance provided by the current loop antenna / magnetic current loop antenna, the radiation performance of the antenna system including the antenna pair can be guaranteed while having a high degree of isolation.

[0183] In an embodiment of the present application, the relative position relationship of two or more antennas may include series, parallel, relative, and orthogonal position relationships. Taking two antennas as an example, the series position setting may include two or more antennas being set on the same side of the electronic device, and the projections of each antenna on the side do not overlap. The parallel position setting may include two or more antennas being set on the same side of the electronic device, and the projections of the two parallel antennas on the set side at least partially overlap. In some embodiments, the planes where the radiators of the two parallel antennas are located are orthogonal. The relative position setting may include two antennas being set on two opposite sides of the electronic device. The orthogonal position setting may include two antennas being set on two adjacent sides of the electronic device.

[0184] It should be understood that, based on the different distinctions between common mode and differential mode, existing antennas may include at least common mode (CM) antennas, differential mode (DM) antennas, etc. Based on different implementation forms, CM antennas and DM antennas may be further subdivided into CM wire antennas, CM slot antennas, and DM wire antennas and DM slot antennas. In some embodiments, the CM slot may be excited by antisymmetric feeding. Correspondingly, the DM slot may be excited by symmetric feeding.

[0185] In an embodiment of the present application, a high isolation antenna pair includes two antennas as an example. At least one of them may include a current loop antenna or a magnetic current loop antenna. The other antenna in the high isolation antenna pair may be a current loop antenna or a magnetic current loop antenna or a CM antenna or a DM antenna. The following Table 1 shows a schematic diagram of the radiation combination effect of the two antennas in the antenna pair when different antenna forms are arranged in parallel. For ease of explanation, take two antennas arranged in parallel at the center of one side of an electronic device as an example.

[0186] Table 1

[0187]

[0188]

[0189] As shown in Table 1, the current loop antenna and any of the following antennas can form a high isolation effect: magnetic current loop antenna, CM wire antenna, and DM slot antenna.

[0190] The magnetic current ring antenna and any of the following antennas can form a high isolation effect: current loop antenna, DM line antenna, CM slot antenna.

[0191] The high isolation effect of the current loop antenna or magnetic current loop antenna and other antennas can be obtained by exciting orthogonal (or nearly orthogonal) currents on the floor to form an orthogonal spatial field distribution. In a specific implementation, the antenna pair with high isolation characteristics can be connected in series, in parallel or in relative positions to achieve a high isolation effect.

[0192] In addition, Table 1 also shows the possible composition of a strongly coupled antenna pair that is different from a high isolation effect. It should be noted that the two antennas in the antenna pair with a high isolation effect can respectively excite orthogonal currents on the floor during operation, so by setting them in series or in parallel or in relatively equal positions, a high isolation effect can be obtained. Correspondingly, the two antennas in the strongly coupled antenna pair can excite parallel or nearly parallel currents on the floor during operation, so the high isolation characteristics of the strongly coupled antenna pair can be achieved through an orthogonal setting in position. Among them, the strongly coupled relationship can be that when two radiation systems (such as two antennas) work at the same time, there will be significant mutual influence, such as positive superposition, or negative superposition, etc. For example, when the two antennas work at the same time, the directions of the floor currents excited respectively are the same or nearly the same, which corresponds to a strongly coupled relationship.

[0193] As shown in Table 1, in a parallel position relationship, antenna combinations with strong coupling characteristics may include:

[0194] An antenna combination consisting of a current loop antenna and any of the following antennas: a current loop antenna, a DM line antenna, or a CM slot antenna.

[0195] An antenna combination consisting of a magnetic flux ring antenna and any of the following antennas: a magnetic flux ring antenna, a CM wire antenna, and a DM slot antenna.

[0196] It should be understood that in the case of series and relative position settings, the situation of each antenna exciting the floor current is similar to that in parallel. Therefore, in the case of series or relative position settings, high isolation or strong coupling characteristics corresponding to the above-mentioned parallel position relationship can also be obtained.

[0197] The following first provides an exemplary description of the series, parallel, relative, orthogonal position settings with reference to the accompanying drawings.

[0198] In some embodiments, Fig.11As shown, the two antennas (such as antenna A1 and antenna A2) included in the antenna pair are arranged in series. In the scenario of series arrangement, antenna A1 and antenna A2 can be respectively located on the same side of the electronic device. In addition, antenna A1 and antenna A2 arranged in series can be located at different positions on the same side. In other words, the projections of antenna A1 and antenna A2 in the direction perpendicular to the center of the electronic device do not overlap. Fig.11 , antenna A1 and antenna A2 can be distributed on the top edge of the electronic device. At the same time, antenna A1 and antenna A2 are arranged on the same approximate straight line, similar to being strung together on the straight line one after the other. Therefore, the similar distribution of antenna A1 and antenna A2 is referred to as series distribution in the present invention. In this way, antenna A1 and antenna A2 are located at different positions of the X-axis on the top edge. In other examples, antenna A1 and antenna A2 distributed in series can also be located together on the side edge of the electronic device. In this way, antenna A1 and antenna A2 are located at different positions of the Y-axis on the side edge. Alternatively, antenna A1 and antenna A2 distributed in series can also be located together on the bottom edge of the electronic device. In this way, antenna A1 and antenna A2 are located at different positions of the X-axis on the bottom edge.

[0199] In other embodiments, Fig.12 As shown, the two antennas (such as antenna B1 and antenna B2) included in the antenna pair are arranged in parallel. Antenna B1 and antenna B2 can be located on the same side of the electronic device, such as the top side. At the same time, the projections of antenna B1 and antenna B2 on the same side, such as the top side, partially or completely overlap. Therefore, the arrangement of antenna B1 and antenna B2 is referred to as parallel arrangement in the present invention. Fig.12 , antenna B1 and antenna B2 can be distributed in parallel on the top edge of the electronic device. Antenna B1 and antenna B2 can partially or completely overlap in their projections in the direction perpendicular to the center of the electronic device (i.e., the negative direction of the Y axis). In other examples, antenna B1 and antenna B2 distributed in parallel can also be located together on the side of the electronic device. Antenna B1 and antenna B2 can partially or completely overlap in their projections in the direction perpendicular to the center of the electronic device (i.e., the positive or negative direction of the X axis). In other examples, antenna B1 and antenna B2 distributed in parallel can also be located together on the bottom edge of the electronic device. Antenna B1 and antenna B2 can partially or completely overlap in their projections in the direction perpendicular to the center of the electronic device (i.e., the positive direction of the Y axis).

[0200] In other embodiments, Fig.13AAs shown, the relative distribution of the two antennas (such as antenna C1 and antenna C2) included in the antenna pair. Antenna C1 and antenna C2 are respectively located on two opposite sides of the electronic device. The distribution of antenna C1 and antenna C2 is referred to as relative distribution in the present invention. In some implementations, the projections of antenna C1 and antenna C2 along any one of the two opposite sides at least partially overlap. The best embodiment is that the projections of antenna C1 and antenna C2 along any one of the two opposite sides completely overlap, that is, antenna C1 and antenna C2 are completely oppositely arranged on two opposite sides of the electronic device. In the example Fig.13A In the example, antenna C1 and antenna C2 can be relatively distributed on the left side and right side of the electronic device. Antenna C1 and antenna C2 can have at least partial overlap in their projections along the X-axis direction. In other examples, the relatively distributed antenna C1 and antenna C2 can also be located at the top or bottom side of the electronic device respectively. Antenna C1 and antenna C2 can have at least partial overlap in their projections along the Y-axis direction.

[0201] In other embodiments, Fig. 13B As shown, the orthogonal distribution of two antennas (such as antenna D1 and antenna D2) included in the antenna pair. Antenna D1 and antenna D2 are respectively located on two adjacent sides of the electronic device. The distribution of antenna D1 and antenna D2 is referred to as orthogonal distribution in the present invention. Fig. 13B , antenna D1 may be located at the top edge of the electronic device, and the corresponding antenna D2 may be located at the side edge of the electronic device. In other examples, antenna D1 may be located at the side edge of the electronic device, and the corresponding antenna D2 may be located at the top edge or the bottom edge of the electronic device. In other embodiments, antenna D1 may be located at the bottom edge of the electronic device, and the corresponding antenna D2 may be located at the side edge of the electronic device.

[0202] It is understandable that the above Figure 11-13B The relative position relationship of can also be described as the difference between parallel and orthogonal. For example, Fig.11 The series distribution shown, Fig.12 The parallel distribution shown, Fig.13A In the relative distribution shown, the sides of the electronic device where the two antennas are located are the same side or two sides parallel to each other. Therefore, in the embodiment of the present application, series distribution, parallel distribution and relative distribution can also be referred to as parallel distribution. Correspondingly, Fig. 13B In the orthogonal distribution shown, two adjacent sides of the electronic device where the two antennas are located may be perpendicular or nearly perpendicular to each other, or other non-parallel sides.

[0203] Combined with the description of the combination of different types of antennas to form high isolation characteristics, in some embodiments, the current loop antenna and the magnetic current loop antenna or the CM wire antenna or the DM slot antenna; the magnetic current loop antenna and the current loop antenna or the DM wire antenna or the CM slot antenna can obtain high isolation characteristics by means of parallel distribution. Correspondingly, the current loop antenna and the current loop antenna or the CM slot antenna or the DM wire antenna; the magnetic current loop antenna and the magnetic current loop antenna or the DM slot antenna or the CM wire antenna can obtain high isolation characteristics by means of orthogonal distribution.

[0204] In addition, the above examples are all described by taking the acquisition of high isolation characteristics of a high isolation antenna pair including two antennas as an example. The embodiment of the present application also provides the acquisition of high isolation characteristics of a high isolation antenna group including three or more antennas and its working mechanism. The specific implementation will be described in detail in the subsequent description.

[0205] For example, Fig. 13C Several different CM antennas and DM antennas are shown. In this example, according to the antenna radiation characteristics, the CM antenna / DM antenna can be divided into a wire antenna and a slot antenna.

[0206] like Fig. 13C As shown in (a), the CM wire antenna may include a radiator BCM1 and a radiator BCM2, and feeding ports may be respectively provided at opposite ends of BMC1 and BMC2. For example, taking BCM1 being provided on the left side of BCM2 as an example, port a1 may be provided at the right end of the radiator of BMC1, and port a2 may be provided at the left end of BCM2. The ends of BCM1 and BCM2 away from ports a1 and a2 are respectively suspended. When the CM wire antenna is working, symmetrical feeding signals (i.e., signals of equal amplitude and phase) may be fed into ports a1 and a2 to realize feeding of the CM wire antenna. It should be noted that, Fig. 13C (a) is only an example of a CM line antenna. In other implementations, the structure of the CM line antenna may be different. For example, the BCM1 and BCM2 may be connected, and a feeding point may be provided at the connection between BCM1 and BCM2, so as to achieve the same as Fig. 13C The radiation function is similar to the structure shown in (a).

[0207] like Fig. 13CAs shown in (b) in the figure, the CM slot antenna may include two radiators, such as BCM3 and BCM4. BCM3 and BCM4 have one end arranged opposite to each other, and ports may be respectively arranged at the opposite ends. For example, port b1 is arranged at the end of BCM3 close to BCM4, and port b2 is arranged at the end of BCM4 close to BCM3. When the CM slot antenna is working, antisymmetric feeding signals (i.e., signals of equal amplitude and antiphase) may be fed to port b1 and port b2 respectively to realize feeding of the CM slot antenna. The end of BCM4 away from BCM3 is grounded, and correspondingly, the end of BCM3 away from BCM4 is grounded. It should be noted that, Fig. 13C (b) is only an example of a CM slot antenna, and the structure of the CM slot antenna may be different in other implementations. For example, the two opposite ends of BCM3 and BCM4 are connected to the positive and negative electrodes of the feeding point, respectively, so as to realize the feeding of the antisymmetric feeding signal.

[0208] like Fig. 13C As shown in (c) in the figure, the DM line antenna may include two radiators BDM1 and BDM2. The end of BDM1 away from BDM2 is suspended. Correspondingly, the end of BDM2 away from BDM1 is suspended. Similar to the aforementioned CM line antenna, ports can be respectively set at the ends of BDM1 and BDM2 that are close to each other. For example, port c1 can be set at the end of BDM1 close to BDM2, and port c2 can be set at the end of BDM2 close to BDM1. Different from the symmetrical feeding signal fed into the CM line antenna, when the DM line antenna is working, anti-symmetrical feeding signals can be fed into port c1 and port c2 respectively. Thereby, feeding of the DM line antenna is achieved. It should be understood that, as Fig. 13C (c) is only an example of a DM line antenna, and the structure of the DM line antenna may be different in other implementations. For example, the antisymmetric feeding signals of BDM1 and BDM2 can be achieved by connecting the opposite ends of BDM1 and BDM2 to the positive and negative electrodes of the feeding point, respectively.

[0209] like Fig. 13C As shown in (d) in the figure, the DM slot antenna may include two radiators, such as BDM3 and BDM4. BDM3 and BDM4 have one end arranged opposite to each other, and the ends of the two radiators that are away from each other are grounded respectively. The oppositely arranged ends may be provided with ports respectively. For example, a port d1 may be provided at an end of BDM3 close to BDM4, and a port d2 may be provided at an end of BDM4 close to BDM3. When the DM slot antenna is working, symmetrical feeding signals may be fed to port d1 and port d2 respectively to achieve excitation of the DM slot antenna. It should be understood that, as Fig. 13C(d) is only an example of a DM slot antenna, and the structure of the DM slot antenna may be different in other implementations. For example, BDM3 and BDM4 may be connected to each other, and a feeding point may be provided at the connection position, through which the DM slot antenna may be symmetrically fed.

[0210] It should be noted that in the high isolation antenna solution provided in the embodiment of the present application, since at least one current loop antenna or magnetic current loop antenna is used, better radiation performance can be provided.

[0211] No matter whether it is a high-isolation antenna pair including two antennas or a high-isolation antenna group including more antennas, the generation of high isolation characteristics is mostly based on achieving orthogonality of currents excited to the floor.

[0212] Exemplary, combined Fig.14 , in some embodiments, a high isolation antenna pair is taken as an example. One of the antennas (such as antenna 1) can excite a transverse current on the floor, and the other antenna (such as antenna 2) can excite a longitudinal current on the floor. Since the transverse current and the longitudinal current on the floor are orthogonal, the corresponding spatial field distribution also has an orthogonal characteristic. Then, when antenna 1 and antenna 2 work at the same time, even if part or all of the frequency bands overlap, the orthogonal spatial electromagnetic fields generated by the exciting floor will interfere less with each other when radiating, so the isolation can be effectively guaranteed. It should be noted that in some implementations of the present application, the currents excited by antenna 1 and antenna 2 may not be transverse or longitudinal. For example, the current excited by antenna 1 may be directed to the lower right, and the current excited by antenna 2 may be directed to the lower left. In this way, the two currents may also have an orthogonal relationship, thereby also making the two antennas have high isolation characteristics.

[0213] For a high isolation antenna group, at least two antennas may form a distributed antenna structure, which can excite orthogonal currents on the floor with at least one other antenna, and the effect is similar to Fig.14 The current distribution shown is used to obtain an orthogonal spatial field structure, thereby achieving high isolation.

[0214] The solution provided in the embodiment of the present application can provide better isolation and, based on the excellent radiation performance of the current loop antenna and / or the magnetic current loop antenna, provide better radiation performance for the antenna pair.

[0215] It should be understood that the antenna can radiate more effectively by exciting the floor during operation. Generally speaking, when the antenna position matches the eigenmode of the floor, the floor radiation can be more effectively excited.

[0216] In this example, the antenna can be divided into an electric field type antenna and a magnetic field type antenna according to its radiation characteristics. Among them, the current loop antenna is a magnetic field type antenna, which corresponds to the current distribution characteristics of the floor eigenmode. It should be understood that when the magnetic field type antenna is placed at a point where the current distribution of the floor eigenmode is larger, it can better excite the floor current and excite a stronger current on the floor. The stronger current can generate a stronger magnetic field, so that the radiation of the floor can provide better help for the radiation of the antenna. In other words, the better radiation of the floor can be used as part of the antenna radiation, so that the antenna can obtain better radiation performance. That is, in the corresponding frequency band, the current loop antenna is set at a high current distribution position of the floor eigenmode, which can more effectively excite the floor to radiate, thereby obtaining better radiation performance of the current loop antenna. Correspondingly, the magnetic current loop antenna is an electric field type antenna, which corresponds to the electric field distribution characteristics of the floor eigenmode. That is, in the corresponding frequency band, the magnetic current loop antenna is set at a high electric field distribution position of the floor eigenmode, which can more effectively excite the floor to radiate, thereby obtaining better radiation performance of the magnetic current loop antenna.

[0217] For example, Fig.15 The figure shows the current distribution of the floor eigenmode at low frequencies (such as 0.85GHz), medium frequencies (such as 1.97GHz), and high frequencies (such as 2.32GHz). It can be seen that the current distribution corresponding to the floor eigenmode is different at different frequencies. For example, at 0.85GHz, the stronger current distribution is at both ends of the floor in the x direction. At 1.97GHz, the stronger current distribution converges in the positive and negative directions in the y direction, forming the following Fig.15 The strong current distribution at 2.32 GHz further converges toward the positive and negative directions of the y-axis, forming the following Fig.15 The two strong current areas at the top and bottom of the floor are shown. For magnetic field type antennas, such as current loop antennas, they can be set in areas where the floor current is strong at the corresponding frequency, so that the antenna can better excite the floor when working, thereby obtaining better radiation performance.

[0218] Fig.16 The electric field distribution of the floor eigenmode at low frequency (such as 0.85GHz), medium frequency (such as 1.97GHz), and high frequency (such as 2.32GHz) is shown. It can be seen that at different frequencies, the electric field distribution corresponding to the floor eigenmode is also different. For example, at 0.85GHz, the stronger electric field is distributed at both ends of the floor in the y direction. At 1.97GHz, the stronger electric field is distributed at both ends of the floor in the y direction and in the middle area of ​​the floor in the y direction. At 2.32GHz, the stronger electric field distribution tends to the edge, distributed as Fig.16For electric field type antennas, such as magnetic flux loop antennas, they can be set in areas where the floor electric field is strong at the corresponding frequency, so that the antenna can better excite the floor when working, thereby obtaining better radiation performance.

[0219] In the following example, the eigenmode matching characteristics corresponding to different antennas are combined to illustrate the setting scheme of the high isolation antenna pair provided in the embodiment of the present application.

[0220] First, the parallel distributed high isolation antenna solution is described.

[0221] For example, Fig.17A An example of a pair of antennas with a certain degree of isolation and distributed in series provided by an embodiment of the present application is shown. In this example, the antenna pair may include antenna A1 and antenna A2. Antenna A1 and antenna A2 may include at least one current loop antenna and / or magnetic current loop antenna. In this example, antenna A1 is a magnetic current loop antenna M11, and antenna A2 is a magnetic current loop antenna M12. In some implementations, the magnetic current loop antenna M11 and / or may be as follows: Fig.10 The coupled-fed magnetic flux loop monopole antenna shown in the figure. For example, the magnetic flux loop antenna M11 may include a radiator B11, one end of the radiator B11 may be provided with a feeding point, and the other end of the radiator B11 may be connected to the inductor L M1 Similarly, the magnetic flux ring antenna M12 may include a radiator B12, one end of the radiator B12 may be provided with a feeding point, and the other end of the radiator B12 may be connected to the ground through an inductor L M2 In some embodiments, the magnetic flux ring antenna M11 and the magnetic flux ring antenna M12 can be set in left and right mirror images, for example, the feeding point of the magnetic flux ring antenna M11 and the feeding point of the magnetic flux ring antenna M12 can be respectively set at the ends of the two antennas close to each other. This can better stimulate the orthogonality of the floor current and obtain better isolation.

[0222] Combination pair Fig.15 as well as Fig.16 In the description of the floor eigenmode, the magnetic flux ring antenna is an electric field type antenna. When working at medium and high frequencies, it can be set in the upper left or upper right corner of an electronic device (such as a mobile phone), thereby stimulating the floor to radiate better, so that the magnetic flux ring antenna M11 can have better radiation performance.

[0223] It should be understood that the magnetic flux loop antenna can excite the ground during operation. Fig. 17BFrom the current direction shown in (a) in the figure, it can be seen that in the floor area close to the antenna, the current direction is close to vertical downward, so the magnetic flux ring antenna forms a high isolation effect with the current loop antenna or DM line antenna or CM slot antenna that can excite the transverse current. As the position gradually moves away from the edge where the antenna is located, the horizontal component of the current gradually increases. Therefore, two magnetic flux ring antennas distributed in series can also have good isolation. For example, refer to Fig. 17B In (b), magnetic flux ring antennas can be set at the left and right ends of the top edge of the electronic device, and the floor current flow directions excited by them can be current flow direction 1 and current flow direction 2 respectively. It can be seen that at the position close to the edge where the antenna is located, the longitudinal components of the current excited by the two antennas are more, while at the position gradually away from the edge where the antenna is located (such as Fig. 17B In the region 1 shown, as the lateral component gradually increases, the angle between the directions of the partial currents generated by the two antennas gradually approaches 90°, so the spatial field distribution of the current excitation corresponding to this region has a nearly orthogonal characteristic. As a result, the two antennas can obtain relatively good isolation in the direction corresponding to this spatial field distribution.

[0224] It should be noted that if Fig. 17B In the description, the magnetic flux ring antenna is set near the end of one side of the electronic device for example. Since the magnetic flux ring antenna is not set at the center of the side, the antenna is in an unbalanced state relative to the reference ground, and the current generated by it will also have a transverse component and a longitudinal component. Relatively speaking, when the magnetic flux ring antenna is set at the center of the side, the longitudinal component of the floor current excited by the magnetic flux ring antenna will be much larger than the transverse component, so that the magnetic flux ring antenna can excite a relatively single longitudinal current. It should be understood that for other antennas that are set on the horizontal side and can generate longitudinal currents, similar to the description of the magnetic flux ring antenna above, when the antenna is set at the center of the side, the direction of the excited floor current is relatively single. When the antenna is set near the end of the side, the excited floor current will include both transverse current and longitudinal current.

[0225] The following is as follows Fig.17A Taking the composition shown as an example, the above high isolation analysis is verified and explained through current simulation.

[0226] In this example, if Fig.18As shown, at the current moment, since the two magnetic flux ring antennas are not set at the center of the sides, the excited current includes both transverse and longitudinal components. When antenna A1 (i.e., magnetic flux ring antenna M11) is working, it can excite the current on the floor of the mobile phone to the lower left. When antenna A2 (i.e., magnetic flux ring antenna M12) is working, it can excite the current on the floor of the mobile phone to the lower right. It can be seen that although the floor currents excited by the two magnetic flux ring antennas are not completely transverse or longitudinal, they still have the characteristics of partial current orthogonality. Therefore, it has the following characteristics: Fig.17A The antenna pair shown can obtain orthogonal spatial field distributions by partially exciting orthogonal floor currents.

[0227] Combination Fig.19 As shown in the far-field radiation diagram, it can be seen that at the same time, the current toward the lower left of the floor excited by antenna A1 can produce a spatial field distribution toward the lower right. Correspondingly, the current toward the lower right of the floor excited by antenna A2 can produce a spatial field distribution toward the lower left. In other words, the two antennas can transmit signals through orthogonal spatial field distributions respectively during the excitation process. Due to the orthogonal relationship of the spatial field distribution, the two antennas can have better isolation. In addition, the antenna pair distributed in series provided in the embodiment of the present application can provide better radiation performance due to the use of current loop antennas and / or magnetic current loop antennas.

[0228] Exemplary, reference Fig. 20 The S parameter simulation is shown. In the current scenario, the return loss of antenna A1 and antenna A2 both reach -10dB, so both antennas have good radiation performance. And through the simulation, we can see that S12, which is used to identify the isolation between the two antennas, is below -15dB, so the isolation between the two antennas is good and can be used in the antenna settings of electronic devices. If the floor currents excited by the two antennas are completely orthogonal, the isolation will be further improved.

[0229] Continue to refer Fig.21 , which shows the efficiency comparison of the two antennas in the current scenario. Fig.21 As shown in (a) of Figure 1, from the perspective of radiation efficiency, antenna A1 and antenna A2 both exceed -5dB after 1.5GHz. Since the two antennas are mirror images, their radiation performance is equivalent and the radiation efficiency curves are basically the same. Fig.21 As shown in (b), from the perspective of system efficiency, the peak efficiencies of antenna A1 and antenna A2 are both greater than -6dB, and the bandwidth can effectively cover at least one operating frequency band.

[0230] In the above description, the antenna pair includes two magnetic current loop antennas as an example. The current loop antenna and / or the magnetic current loop antenna can be coupled fed or directly fed. In other embodiments of the present application, the antenna pair distributed in series can also include other antennas that can excite floor transverse currents and antennas that can excite floor longitudinal currents.

[0231] Exemplarily, in some embodiments, the antenna pair distributed in series may include a current loop antenna, and any one of a CM line antenna or a DM slot antenna. The current loop antenna can excite a current on the floor parallel to the side where the current loop antenna is located, and correspondingly, the CM line antenna or the DM slot antenna can excite a current on the floor perpendicular (or nearly perpendicular) to the side where the current loop antenna is located, thereby forming a high isolation characteristic.

[0232] In other embodiments, the antenna pair distributed in series may include a magnetic flux ring antenna, and any one of a DM line antenna or a CM slot antenna. The magnetic flux ring antenna can excite a current on the floor that is perpendicular (or nearly perpendicular) to the side where the magnetic flux ring antenna is located, and correspondingly, the DM line antenna or the CM slot antenna can excite a current on the floor that is parallel (or nearly parallel) to the side where the magnetic flux ring antenna is located, thereby forming a high isolation characteristic.

[0233] For example, Fig.22A As shown in (a), other antenna pairs with high isolation characteristics can be provided in electronic devices with a series-distributed direct-feed current loop antenna and a magnetic current loop antenna. The floor currents excited by the current loop antenna and the magnetic current loop antenna can also be partially orthogonal, thereby obtaining better isolation. Fig.22A As shown in (b), taking the CM wire antenna as a monopole antenna as an example, a direct-fed current loop antenna and a monopole antenna distributed in series may be provided in the electronic device.

[0234] Since the floor current excitation conditions of other antenna forms that can excite longitudinal current (such as CM wire antenna, etc.) are similar to those of magnetic current ring antenna, magnetic current ring antenna can also form a high isolation effect in a certain direction with antenna forms including CM wire antenna and DM slot antenna. This high isolation antenna form distributed in series should also be within the protection scope of the embodiments of the present application.

[0235] It should be noted that in the above examples, two antennas are used to form a high isolation antenna pair. In other implementations of the present application, more antennas may be used to form a high isolation effect.

[0236] Exemplarily, the high isolation antenna may be composed of three antennas or more. Here, three antennas are taken as an example. Two of the three antennas can be equivalently regarded as a distributed antenna structure. In this way, the distributed antenna structure and the remaining antennas can obtain a high isolation effect by exciting the orthogonal current of the floor in a state of series distribution. In the present application, an antenna group with high isolation characteristics composed of three or more antennas can be referred to as a high isolation antenna group.

[0237] As an example, Fig. 22B Several examples of high isolation antenna groups consisting of three antennas are shown. Fig. 22B As shown in (a), the three antennas of the high isolation antenna group in this example may include two magnetic current ring antennas: a magnetic current ring antenna M13, a magnetic current ring antenna M14, and an electric current ring antenna E12. The magnetic current ring antenna M13 and the magnetic current ring antenna M14 are arranged on the same side of the electronic device, and may be on any side of the electronic device. The electric current ring antenna E12 may be arranged between the magnetic current ring antenna M13 and the magnetic current ring antenna M14.

[0238] When feeding, the two magnetic flux loop antennas (such as magnetic flux loop antenna M13 and magnetic flux loop antenna M14) can adopt the form of symmetrical feeding (equal amplitude and same phase) to form a single-port distributed antenna structure 1. In other words, the feeding signals fed into the magnetic flux loop antenna M13 and the magnetic flux loop antenna M14 are equal amplitude and same phase. In this way, when the two magnetic flux loop antennas are working, they form a distributed antenna structure 1. In the case of symmetrical feeding, the floor current generated by the two magnetic flux loops, such as Fig.18 As shown in the figure, one is toward the lower left and the other is toward the lower right. After the two are combined, the transverse currents cancel each other out, and the vertical downward current is dominant. The floor current generated by the excitation of the current loop antenna E12 is mainly transverse current. Figure 5 Therefore, the floor current generated by the distributed antenna structure 1 and the floor current generated by the current loop antenna E12 have a good orthogonal characteristic, so that the distributed antenna structure 1 and the current loop antenna E12 form an antenna pair with high isolation.

[0239] refer to Fig. 22C , showing that Fig. 22B An example of the directional pattern of a high isolation antenna group as shown in (a). Fig.22D It shows that Fig. 22B The port isolation of the high isolation antenna group shown in (a) is shown in FIG. The distributed antenna structure 1 can correspond to one of the dual ports, and the current loop antenna E12 can correspond to the other of the dual ports. Fig.22D As shown, the isolation is very good, and the highest point is less than -120dB. Fig. 22BIn addition, since the antennas constituting the high isolation antenna group are magnetic flux loop antennas and current loop antennas, combined with the above description of current loop antennas and magnetic flux loop antennas, the high isolation antenna group also has good radiation characteristics. The specific situation is referred to the above example, which will not be repeated here.

[0240] Continue to refer Fig. 22B .like Fig. 22B As shown in (b), the three antennas of the high isolation antenna group in this example may include two current loop antennas: a current loop antenna E13, a current loop antenna E14, and a magnetic current loop antenna M15. The current loop antenna E13 and the current loop antenna E14 are arranged on the same side of the electronic device, and may be on any side of the electronic device. The magnetic current loop antenna M15 is arranged between the current loop antenna E13 and the current loop antenna E14.

[0241] Similar to the above Fig. 22B As shown in (a), when feeding, two current loop antennas (such as current loop antenna E13 and current loop antenna E14) can be symmetrically fed (equal amplitude and same phase) to form a single-port distributed antenna structure 2, that is, the feeding signals fed into the current loop antenna E13 and the current loop antenna E14 can be equal amplitude and same phase. In this way, when the two current loop antennas are working, they can form a distributed antenna structure 2, and the distributed antenna structure 2 can form a high-isolation antenna pair with the magnetic current loop antenna M15. The reason is that the transverse floor current generated by the excitation of the distributed antenna structure 2 composed of the two current loop antennas has a good orthogonal characteristic with the longitudinal floor current generated by the excitation of the magnetic current loop antenna M15.

[0242] Combining the above Fig. 22B The high isolation and good radiation characteristics of (a) are shown in FIG. Fig. 22B The high isolation antenna group shown in (b) can also have better high isolation and better radiation characteristics.

[0243] It can be seen that the above Figure 22B-Figure 22D In the example, the example in which each antenna in the high-isolation antenna group is fed in a symmetrical feeding manner to obtain two high-isolation working modes is used for explanation.

[0244] In some other implementations of the present application, the high isolation antenna group may also include antennas of the same type, and the antennas of the same type may be divided into two groups according to feeding differences.

[0245] For example, combining Fig.22EIn (a), a high isolation antenna group including three current loop antennas is taken as an example. The three current loop antennas (current loop antennas E15, E16, and E17) can be distributed in series on one side of the electronic device. The current loop antennas on both sides can constitute a distributed antenna pair 3. The current loop antenna E15 and the current loop antenna E17 use antisymmetric feeding (equal amplitude and antiphase) to form a single-port distributed antenna structure 3. This formed single-port structure 3 forms a dual-port antenna structure with the current loop antenna E16 located in the middle. That is to say, when f1 is directly fed into the current loop antenna E15, a feeding signal with equal amplitude and antiphase to f1 (such as obtained by an inverter) can be fed into the current loop antenna E17, thereby realizing antisymmetric feeding of the current loop antenna E15 and the current loop antenna E17.

[0246] In this way, the distributed antenna pair 3 and the current loop antenna E16 can respectively excite orthogonal currents on the floor, thereby obtaining high isolation characteristics.

[0247] For example, Fig.22F It shows that Fig.22E The directional diagram of the high isolation antenna group shown in (a) is shown in FIG. It can be seen that the current loop antenna E16 located in the middle can form a horizontal spatial field distribution under the excitation of f1, and the corresponding distributed antenna pair 3 composed of the current loop antenna E15 and the current loop antenna E17 located at both ends can form a longitudinal spatial field distribution under the antisymmetric excitation of f2. In this way, two orthogonal spatial field distributions can be obtained, and the high isolation characteristics can be obtained.

[0248] Continue to combine Fig.22E , with a high isolation antenna group including three magnetic current ring antennas (such as Fig.22E Take (b) in the figure as an example. The magnetic current loop antenna (such as the magnetic current loop antenna M16 and the magnetic current loop antenna M18) adopts antisymmetric feeding (equal amplitude and antiphase) to form a single-port distributed antenna structure 4. The distributed antenna structure 4 formed forms a dual-port antenna structure with the magnetic current loop antenna M17 located in the middle. That is to say, when f3 is directly fed into the magnetic current loop antenna M16, the feeding signal with equal amplitude and antiphase to f3 (such as obtained by an inverter) can be fed into the magnetic current loop antenna M18, thereby realizing antisymmetric feeding of the magnetic current loop antenna M16 and the magnetic current loop antenna M18.

[0249] In this way, the lateral floor current distribution generated by the excitation of the distributed antenna pair 4 and the longitudinal floor current generated by the excitation of the magnetic current ring antenna M17 form orthogonal currents, thereby obtaining high isolation characteristics.

[0250] Combined with the above description, due to Fig.22EThe two high isolation antenna group examples shown in are composed of a current loop antenna or a magnetic current loop antenna, and thus can provide good radiation performance while having high isolation characteristics.

[0251] In addition, it should be noted that the above Figure 22B-Figure 22E The composition of the high isolation antenna group shown can be any composition different from the current loop antenna or magnetic current loop antenna shown in the above examples, and its feeding method can also be the direct feeding form as in the above examples, or the coupled feeding form. The effect that can be achieved is similar to the effect shown in the above description, and will not be repeated here.

[0252] From the above description, it can be seen that in the case of the series distribution provided in this example, at least one current loop antenna and / or magnetic current loop antenna can be set in the antenna pair, so as to obtain better radiation performance while obtaining better isolation, thereby reducing the mutual influence between the antennas in the antenna pair and improving the overall radiation performance.

[0253] The following is a description of the high isolation antenna pair solution provided in parallel with the accompanying drawings. Continuing with the example of the antenna pair including two antennas (such as antenna B1 and antenna B2), antenna B1 is a magnetic current loop antenna M21, and antenna B2 is an electric current loop antenna E21. In some embodiments, Fig.23A As shown, the magnetic current loop antenna M21 may be a coupled-fed magnetic current loop antenna, and the current loop antenna E21 may be a coupled-fed current loop antenna, for example.

[0254] like Fig.23A As shown, the antenna B2 and the antenna B1 may partially or completely overlap in the axial projection of the Y axis. Fig.23A The magnetic flux loop antenna M21 may have a structure as shown in FIG. Fig.10 For example, the antenna may include a radiation branch B11, and both ends of B11 may be provided with inductive grounding. Fig.23A As shown, the two ends of B11 can be set with inductors L CM1 and L CM2 When the magnetic flux loop antenna M21 is fed by coupling, it may also include a feeding branch CB11 between the radiation branch and the reference ground. It should be noted that in other embodiments, the magnetic flux loop antenna M21 may also be other structures, and specific reference is made to the above description of the magnetic flux loop antenna, which will not be repeated here.

[0255] In addition, the antenna B2 may be Fig.23A The current loop antenna E21 shown in FIG. The current loop antenna E21 may have a Figure 7For example, the antenna may include a radiation branch B12, and capacitors may be provided at both ends of B12 to be grounded. Fig.23A As shown, the two ends of B12 can be set with capacitors C CM1 and C CM2 When the current loop antenna E21 is fed by coupling, it may also include feeding branches CB12 and CB13 between the radiation branch and the reference ground. It should be noted that in other embodiments, the current loop antenna E21 may also be other structures, and specific reference is made to the above description of the current loop antenna, which will not be repeated here.

[0256] As a possible implementation, Fig. 23B Shows a method having Fig.23A Model view of the parallel distributed antenna pair of the topological structure shown. It can be seen that in this example, the current loop antenna E21 can be set on the top of the electronic device. The radiator of the current loop antenna E21 can be located in the zox plane. The magnetic current loop antenna M21 can also be set on the top of the electronic device, and the radiator of the magnetic current loop antenna M21 can be set in the xoy plane parallel to the electronic device. That is to say, in the case of this parallel distribution, the planes where the radiators of the two antennas are located have an orthogonal relationship. It should be understood that for other antenna pairs distributed in parallel, they can also be implemented in their corresponding products by respectively setting the radiators on two orthogonal planes.

[0257] The antenna pair with parallel distribution also has a high degree of isolation. For example, in this example, antenna B1 can excite the longitudinal current on the floor, and antenna B2 can excite the transverse current on the floor. Fig.24 The floor current simulation shown can be verified. Fig.24 As shown, in the current scenario, the floor current excited by antenna B1 is a longitudinal current along the Y axis. Correspondingly, the floor current excited by antenna B2 is a transverse current to the right along the X axis. In other words, the floor currents excited by antenna B1 and antenna B2 are orthogonal, so the antenna B1 and antenna B2 provided in this example have good isolation. Fig.25 The far-field radiation pattern shown can also prove the orthogonality of the working state of the excited floor during the operation of antenna B1 and antenna B2.

[0258] Through the above description, it should be understood that the antenna pair consisting of the antenna B1 and the antenna B2 distributed in parallel can have good isolation due to the orthogonal characteristics of the excitation floor. In this example, the antenna pair consisting of the antenna B1 and the antenna B2 can include a current loop antenna and a magnetic current loop antenna.

[0259] Due to the good radiation characteristics of the current loop antenna and the magnetic current loop antenna, the antenna pair can provide good radiation performance even in a parallel distribution scenario.

[0260] Exemplary, combined Fig.26 , which is a simulation diagram of S parameters. It can be seen that the deepest points of S11 of antenna B1 and antenna B2 are both over -10dB, and the corresponding worst isolation point is about -42dB, which can meet the isolation requirements for different antennas in electronic devices. Fig. 27 FIG. 4 shows the efficiency simulation of the parallel-connected antenna pair. Fig. 27 As shown in (a) in the figure, from the perspective of radiation efficiency, the peak radiation efficiency of the current loop antenna has exceeded -1dB, and correspondingly, the radiation efficiency of the magnetic current loop antenna has exceeded -4dB. Fig. 27 As shown in (b), from the perspective of system efficiency, the peak value of the system efficiency of the current loop antenna exceeds -1dB, and correspondingly, the system efficiency of the magnetic current loop antenna also exceeds -4dB.

[0261] That is to say, the parallel-connected antenna pair provided in this example can provide better radiation performance (such as radiation efficiency and / or system efficiency, etc.) while having better isolation.

[0262] In the above description, the example of the parallel antenna pair being arranged in the middle of the top of the electronic device is used for explanation. Combined with the above distribution of the floor eigenmode, the middle of the top can better stimulate the radiation of the current loop antenna. Fig.26 and Fig. 27 In the efficiency diagram shown, the efficiency of the current loop antenna is relatively good, while the efficiency of the magnetic current loop antenna is relatively poor. Therefore, this position is suitable for scenarios where the performance requirements of the current loop antenna are good.

[0263] In other implementations, the position of the antenna pair can be moved to reasonably adjust the excitation of each antenna in the antenna pair to the floor, thereby flexibly adjusting the radiation performance of each antenna. Fig.28 , taking the example of setting the parallel distributed antenna pair at the upper left corner of the electronic device. It can be understood that in this position, the magnetic flux ring antenna can better excite the floor eigenmode, and thus can have better radiation performance.

[0264] Fig.29 For having Fig.28 The far-field radiation pattern of each antenna when the antenna pair is in operation is shown in FIG. Fig.30 This is an S parameter simulation diagram. Fig.30As shown, the magnetic flux ring antenna M21 can be well excited at this position, and the deepest point of S11 has exceeded -20dB, which is a significant improvement compared to the case where the antenna pair is set in the middle of the top. Correspondingly, due to the significant improvement in the performance of the magnetic flux ring antenna M21, the isolation of the corresponding frequency band has also deteriorated accordingly. For example, the worst point of S12 is close to -15dB. The reason for the deterioration of isolation is that when the parallel antenna pair moves to the corner of the electronic device, the floor current excited by the magnetic flux ring antenna M21 will produce an oblique component, that is, a lateral component, which affects the orthogonality and further affects the isolation. However, even if the isolation is deteriorated, the isolation is close to -15dB, so this solution can be applied to electronic devices, and due to the improvement in the performance of the magnetic flux ring antenna M21, it can provide better radiation performance for scenarios where the isolation requirements are not very strict.

[0265] Combination Fig.31 The efficiency simulation shown in the figure shows that Fig.31 As shown in (a) in the figure, the radiation efficiency of the magnetic flux ring antenna M21 is given by Fig. 27 The -4dB shown in the figure has been improved to -2dB, which is a significant improvement. Correspondingly, the radiation efficiency of the current loop antenna E21 is also maintained at around -1dB peak. Fig.31 As shown in (b), the system efficiency of the magnetic current loop antenna M21 is improved to about -2dB, while the system efficiency peak of the current loop antenna E21 exceeds -2dB.

[0266] Therefore, through the above simulation verification, by moving the parallel distributed antenna pair to the upper left corner of the electronic device, the radiation performance of the magnetic current loop antenna M21 can be significantly improved, while ensuring that the radiation performance of the current loop antenna E21 is not significantly affected.

[0267] In the above introduction to the parallel-distributed high-isolation antenna pair, the antenna pair includes a coupled-fed current loop antenna and a coupled-fed magnetic current loop antenna as an example. In other embodiments of the present application, the antenna pair may also include a direct-fed current loop antenna and / or a direct-fed magnetic current loop antenna. In other embodiments of the present application, the antenna pair may also include other existing antennas. For example, the CM antenna and / or DM antenna involved in the above examples.

[0268] For example, Fig.32 FIG. 1 shows a schematic diagram of a pair of antennas connected in parallel. In this example, the pair of antennas may include: Figure 7 The coupled-fed current loop antenna E21 (such as antenna B2) and the CM line antenna (such as antenna B1) are shown. Antenna B1 and antenna B2 can be connected in parallel and distributed on the top edge of the electronic device. That is, in the projection in the Y-axis direction, antenna B1 and antenna B2 include at least partial overlap or full overlap.

[0269] In having Fig.32 When the antenna pair shown is working, Fig.33 As shown, antenna B1 (i.e., CM wire antenna) can excite longitudinal current on the floor, and correspondingly, antenna B2 (i.e., current loop antenna E21) can excite transverse current on the floor. In other words, antenna B1 and antenna B2 can excite orthogonal current on the floor. Fig.34 The far-field radiation pattern of each antenna in this example is shown.

[0270] The following is an explanation through S parameters and efficiency simulation. Fig.35 As shown in the figure, when the operating frequency bands of antenna B1 and antenna B2 basically overlap, S11 basically overlaps near 1.6GHz. The deepest point of the curve exceeds -10dB. The isolation indicated by S12 is below -40dB in the entire operating frequency band, so it has good isolation. Fig.36 As shown in (a) in the figure, from the perspective of radiation efficiency, the current loop antenna E21 obviously provides better radiation performance. At the same time, the existing CM wire antenna can also provide a radiation efficiency higher than -6dB. Therefore, the radiation capabilities provided by the two antennas can be used to meet the bandwidth coverage in the actual working process. Fig.36 As shown in (b), from the perspective of system efficiency, under the current environment matching, the peak efficiency of the current loop antenna E21 (ie, antenna B2) has exceeded -1dB, and correspondingly, the peak efficiency of the existing CM antenna has also exceeded -6dB.

[0271] Thus, it is proved that Fig.32 The parallel-connected antenna pair consisting of the current loop antenna E21 and the existing antenna (such as a CM wire antenna) shown has good isolation and can also provide good radiation performance.

[0272] The following continues to illustrate an antenna pair consisting of a current loop / magnetic current loop antenna and an existing antenna in a parallel distribution scenario by example.

[0273] refer to Fig.37 In this example, the antenna B1 may be a current loop antenna E21. For example, the current loop antenna E21 may have Figure 7 The antenna B2 can be a DM slot antenna. Similarly, the antenna B2 (i.e., the DM slot antenna) can excite the longitudinal current on the floor, and correspondingly, the antenna B1 (i.e., the current loop antenna E21) can excite the transverse current on the floor. In other words, the antenna B1 and the antenna B2 can excite the orthogonal current on the floor, and the two have a high degree of isolation.

[0274] In having Fig.37When the antenna pair shown is working, Fig.38 The far-field radiation pattern of each antenna in this example is shown.

[0275] The following is an explanation through S parameters and efficiency simulation. Fig.39 As shown in FIG. 1 , when the operating frequency bands of antenna B1 and antenna B2 are basically overlapped, S11 is basically overlapped near 1.6 GHz. The isolation indicated by S12 is below -60 dB in the entire operating frequency band, so it has good isolation. Fig.40 As shown in (a) in the figure, from the perspective of radiation efficiency, the current loop antenna E21 obviously provides better radiation performance. At the same time, the existing DM slot antenna can also provide a radiation efficiency higher than -7dB. Therefore, the radiation capabilities provided by the two antennas can be used to meet the bandwidth coverage in the actual working process. Fig.40 As shown in (b), from the perspective of system efficiency, under the current environment matching, the peak efficiency of the current loop antenna E21 (ie, antenna B1) has exceeded -4dB, and correspondingly, the peak efficiency of the existing DM slot antenna has also exceeded -8dB.

[0276] Thus, it is proved that Fig.37 The parallel-connected antenna pair consisting of the current loop antenna E21 and the existing antenna (such as the DM slot antenna) shown has good isolation and can also provide good radiation performance.

[0277] It is understandable that the high isolation antenna pair formed with the existing antenna may also include a current loop antenna and a CM line antenna or a DM slot antenna to form an antenna pair. Fig.41 As shown, the current loop antenna and the monopole antenna can be distributed in parallel to form a high isolation antenna pair. The floor current that can be excited is similar to the orthogonality of the series distribution in the above description, so it can also have high isolation characteristics. In addition, the magnetic current loop antenna, the antenna pair composed of the DM line antenna or the CM slot antenna, can also generate orthogonal floor currents in some directions through series distribution or parallel distribution, providing better isolation. Combined with Fig.32 The CM wire antenna and the current loop antenna shown in the figure form a high isolation antenna pair. Fig.41 The antenna pair shown can also be understood as Fig.32 The miniaturized design of the high isolation antenna pair shown in FIG. Fig.41 After the antenna pair of the structure shown in the figure is flipped left and right, it is similar to Fig.41 By splicing the antennas shown in the combination, you can get a signal close to Fig.32 The high isolation antenna pair is shown in FIG. Fig.32The high isolation antenna pair shown can provide good isolation and radiation performance, and its miniaturized design, such as Fig.41 The antenna pair shown can also provide good isolation and radiation performance.

[0278] Through the above Figure 17A to Figure 41 It can be understood that, in a parallel distribution position relationship including series distribution and parallel distribution, a high isolation antenna pair including at least two antennas can obtain high isolation characteristics by exciting orthogonal currents on the floor (or locally exciting orthogonal currents). Similarly, high isolation characteristics can also be obtained by relative arrangement of two antennas.

[0279] For example, Fig.42 As shown, a high isolation antenna pair including two antennas is taken as an example. The two antennas may be as follows Fig.42 The antenna C1 and antenna C2 shown. The antenna C1 and antenna C2 can be arranged on two non-intersecting sides of the electronic device. For example, the antenna C1 and antenna C2 can be respectively arranged on two opposite sides of the mobile phone. The antenna C1 and antenna C2 can also be respectively arranged on the top and bottom sides of the mobile phone. In addition, the projections of the antenna C1 and antenna C2 on the arranged sides can be partially overlapped or completely overlapped. For example, if the antennas C1 and C2 are respectively arranged on two opposite sides, the projections on any one of the two opposite sides can be partially overlapped or completely overlapped; they can also be staggered, that is, the projections have no overlapping parts. As Fig.42 As shown, antenna C1 and antenna C2 can both be configured as magnetic current loop antennas.

[0280] It should be noted that in different implementations, the specific implementations of the antenna C1 and the antenna C2 may be different. For example, as an example, Fig.43 Specific examples of several relatively arranged high isolation antenna pairs provided in the embodiments of the present application are shown.

[0281] like Fig.43 As shown in (a) of FIG. 1 , the high isolation antenna pair in this example may include a magnetic current ring antenna M41 and a magnetic current ring antenna M42. The magnetic current ring antenna M41 and the magnetic current ring antenna M42 may be relatively arranged on two non-adjacent sides of the electronic device. For example, Fig.43 As shown in (a) of FIG. 1 , the magnetic flux ring antenna M41 and the magnetic flux ring antenna M42 can be arranged on two long sides (i.e., the left side and the right side) of the electronic device. In different implementations, the magnetic flux ring antenna M41 and the magnetic flux ring antenna M42 can be located at different positions on the long sides. For example, Fig.43As shown in (a), the magnetic flux ring antenna M41 and the magnetic flux ring antenna M42 can be arranged in the middle position of the long side and arranged opposite to each other. Therefore, when working, the magnetic flux ring antenna M41 and the magnetic flux ring antenna M42 can respectively excite orthogonal currents on the floor, thereby obtaining orthogonal spatial field distribution, and then obtaining high isolation characteristics.

[0282] With Fig.43 The mechanism shown in (a) is similar to that shown in Fig.43 As shown in (b) of FIG. 1 , the high isolation antenna pair in this example may include a current loop antenna E41 and a current loop antenna E42. The current loop antenna E41 and the current loop antenna E42 may be relatively arranged on two non-adjacent sides of the electronic device. For example, Fig.43 As shown in (b) of FIG. 1 , the current loop antenna E41 and the current loop antenna E42 can be arranged on two long sides (i.e., the left side and the right side) of the electronic device. In different implementations, the current loop antenna E41 and the current loop antenna E42 can be located at different positions on the long sides. For example, Fig.43 As shown in (b), the current loop antenna E41 and the current loop antenna E42 can be arranged in the middle of the long side and arranged opposite to each other. Therefore, when working, the current loop antenna E41 and the current loop antenna E42 can respectively excite local orthogonal currents on the floor, thereby obtaining orthogonal spatial field distribution, and then obtaining high isolation characteristics.

[0283] In addition, if Fig.43 As shown in (c) in FIG. 1 , the high isolation antenna pair in this example may include a current loop antenna E43 and a magnetic current loop antenna M43. The current loop antenna E43 and the magnetic current loop antenna M43 may be relatively arranged on two non-adjacent sides of the electronic device. For example, Fig.43 As shown in (c) of FIG. 1 , the current loop antenna E43 and the magnetic current loop antenna M43 can be arranged on two long sides (i.e., the left and right sides) of the electronic device. In different implementations, the current loop antenna E43 and the magnetic current loop antenna M43 can be located at different positions on the long sides. For example, Fig.43 As shown in (c), the current loop antenna E43 and the magnetic current loop antenna M43 can be arranged in the middle of the long side and arranged relative to each other. Therefore, when working, the current loop antenna E43 and the magnetic current loop antenna M43 can respectively excite orthogonal currents on the floor, thereby obtaining orthogonal spatial field distribution, and then obtaining high isolation characteristics.

[0284] In addition, the above Fig.43 In the examples, the feeding is performed by direct feeding as an example. Fig.43 Under the relative position relationship (such as relative arrangement) of the high isolation antenna pair shown, at least one antenna in the antenna pair having the same antenna type may also be fed in the form of coupled feeding.

[0285] For example, the following Fig.43 Based on (c) in FIG. 1 , an example is given of a high isolation antenna pair that is relatively arranged based on coupled feeding.

[0286] like Fig.44 As shown, in this example, the antenna pair may include a coupled-fed current loop antenna E44 and a magnetic current loop antenna M44 disposed opposite to the current loop antenna E44. In some implementations, the current loop antenna E44 may have a Figure 7 As shown in the composition, the magnetic current ring antenna M44 can have Fig.10 Composition shown.

[0287] It should be understood that Fig.44 The schematic diagram of the coupled feed is as follows Fig.43 Based on (c) in the above, Fig.43 (a) or Fig.43 The antennas involved in (b) may also include at least one antenna that is fed by coupling feeding, which will not be described in detail here.

[0288] like Fig.44 As shown, based on the above analysis, when the magnetic current ring antenna M44 is set at the center of the left long side, the transverse current component of the floor current that it can excite will be much larger than the longitudinal current component, thereby obtaining Fig.44 The effect of the transverse current is shown. Correspondingly, the current loop antenna E44 can excite the longitudinal current on the floor, and the floor currents excited by the magnetic current loop antenna M44 and the current loop antenna E44 are orthogonal, thereby obtaining a high isolation effect.

[0289] In order to more clearly illustrate the effect of the antenna solution provided in the embodiment of the present application, the following relatively arranged high isolation antenna pair has the following characteristics: Fig.44 As an example, combining the structure shown Figure 45A-Figure 46 Its working mechanism and effects are explained.

[0290] For example, Fig.45A The figure shows the situation of exciting the floor current when the current loop antenna E44 is working. Fig.44 The results of the theoretical analysis shown in the figure are completely consistent. It can be seen that the current loop antenna E44 can excite the longitudinal current at the center of the floor. Fig.45B The figure shows the situation of exciting the floor current when the magnetic current loop antenna M44 is working. It can be seen that the magnetic current loop antenna M44 can excite the transverse current at the center of the floor. Therefore, two orthogonal currents can be obtained at the center of the floor, so that the current loop antenna E44 and the magnetic current loop antenna M44 can excite orthogonal currents to obtain a high isolation effect.

[0291] With Fig.44 The far-field pattern of the antenna group of the structure shown is as follows Fig.45C shown. Fig.46 The results of S parameter simulation are shown in Figure 1. It can be seen that the dual-port isolation of the two antennas has reached below -160dB, so the isolation meets the high isolation requirement. In addition, S11 shows that the deepest point of the two antennas is close to or reaches -20dB, and the bandwidth is sufficient to cover at least one operating frequency band. Fig.44 The structure shown is able to provide good radiation performance while providing high isolation.

[0292] In addition, in Fig.43 (a) and Fig.43 In the example (b) of FIG. 1 , an antenna pair consisting of antennas of the same type is provided at the same time, which can also provide good isolation. The reason is that the distance between the two antennas is farther than that of the series or parallel distribution, so better isolation can be obtained due to the longer distance. The isolation in both examples can reach an effect of about -20dB.

[0293] It should be noted that, similar to the above-mentioned series distribution and parallel distribution schemes, in the relative distribution scheme, the current loop antenna and the magnetic current loop antenna can also have a structure different from that in the above examples, and the feeding form can also be coupled feeding different from direct feeding. The effects that can be achieved are similar and will not be repeated here.

[0294] Therefore, through the above Figure 17A-Figure 46 It can be understood that in the case of parallel distribution including series distribution, parallel distribution, and relative distribution, since orthogonal currents on the floor can be excited, better isolation can be obtained. At the same time, due to the use of current loop antennas and / or magnetic current loop antennas, the antenna solution also has better radiation performance.

[0295] In the following description, an exemplary description will be given of how to obtain high isolation characteristics of an antenna pair (antenna group) composed of strongly coupled antennas as shown in Table 1 in the case of orthogonal distribution in conjunction with the accompanying drawings.

[0296] In this example, a high isolation antenna pair including at least two antennas with orthogonal characteristics can be set on the electronic device to form high isolation. The position of the orthogonal characteristics can be: the two antennas are respectively set on two adjacent sides of the electronic device. Taking the electronic device as a mobile phone as an example, one antenna can be set on the short side of the mobile phone, and the other antenna can be set on any long side of the mobile phone adjacent to the short side.

[0297] As a possible implementation, in combination with the description of the aforementioned Table 1, the orthogonally distributed high isolation antenna pair may include any one of the following combinations:

[0298] One antenna is a current loop antenna, and the other antenna is a current loop antenna, a DM line antenna, or a CM slot antenna. Alternatively, one antenna is a magnetic current loop antenna, and the other antenna is a magnetic current loop antenna, a CM line antenna, or a DM slot antenna.

[0299] When working, the two antennas can respectively excite orthogonal currents on the floor, thereby obtaining orthogonal spatial field distribution and thus obtaining high isolation characteristics. In addition, since the high isolation antenna pair adopts current loop antenna / magnetic current loop antenna, it can also provide good radiation characteristics.

[0300] Exemplarily, in some embodiments, the high isolation antenna pair may include two current loop antennas. Fig.47 As shown in (a), two current loop antennas are taken as an example, namely, current loop antenna E31 and current loop antenna E32. In this example, the current loop antenna E31 and the current loop antenna E32 can be current loop monopole antennas. In other examples, the current loop antenna E21 and / or the current loop antenna E32 can also be other forms of current loop antennas. It should be understood that in different implementations, the feeding form of the current loop antenna can also be different, such as direct feeding or coupled feeding.

[0301] In such Fig.47 In the example of (a), the current loop antenna E31 and the current loop antenna E32 can be respectively located on two adjacent sides of the electronic device (such as a mobile phone). For example, the current loop antenna E31 is set on the top short side of the mobile phone, and the current loop antenna E32 is set on the left long side of the mobile phone. The current loop antenna E32 can be set on both sides of the left long side, such as the top or bottom of the left long side.

[0302] In this way, when the high isolation antenna pair composed of the current loop antenna E31 and the current loop antenna E32 is working, the current loop antenna E31 can excite the transverse current on the short side of the floor, and correspondingly, the current loop antenna E32 can excite the longitudinal current on the long side of the floor. This achieves the effect of exciting the orthogonal current of the floor, thereby obtaining the orthogonal spatial field distribution in the far field, and then obtaining the effect of high isolation.

[0303] With the above Fig.47 Similar to (a) in Fig.47In the example (b), the magnetic flux loop antenna is a direct-fed magnetic flux loop monopole antenna. In other embodiments of the present application, the magnetic flux loop antenna M31 and / or the magnetic flux loop antenna M32 may also be any other magnetic flux loop antenna involved in the above description, and its feeding form is not limited to direct feeding, and may also be fed by coupling feeding.

[0304] As described in the above example, the current loop antenna E32 / magnetic current loop antenna M32 is set at the top of the left long side for explanation. It can be understood that when the high isolation antenna pair works near the intermediate frequency (2GHz), the large current points corresponding to the floor are located on both sides of the side, and the floor current at the center of the side is relatively small. Therefore, for the current loop antenna of the magnetic field type antenna, when the current loop antenna E32 is set on both sides of the long side, better performance can be obtained. For example, in other embodiments, the current loop antenna E32 can also be set at the bottom of the long side of the electronic device, which can also excite the longitudinal current of the long side, thereby obtaining a high isolation effect with the current loop antenna E31. Similarly, the current loop antenna E32 can also be set at the high current position corresponding to the long side of the right side of the mobile phone, so as to obtain better radiation performance while also obtaining a high isolation effect with the current loop antenna E31.

[0305] The following high isolation antenna pairs with orthogonal distribution are as follows Fig.47 Taking the composition of (b) in the above as an example, its performance is explained.

[0306] For example, Fig.48 As shown, with Fig.47 The orthogonally distributed high-isolation antenna pair composed of (b) in the figure produces a spatial field distribution that is approximately in an orthogonal state. It can be understood that the magnetic flux ring antenna M31 can excite the longitudinal current on the floor. Correspondingly, the magnetic flux ring antenna M32 can excite the transverse current on the floor. In this example, in order to take into account the performance of the magnetic flux ring antenna, the magnetic flux ring antenna M32 is not set in the middle position of the side of the electronic device, so the excited transverse current of the floor is not absolutely parallel to the horizontal direction. However, since the angle between the spatial fields generated by the two antennas is close to 90 degrees, a high isolation effect can also be produced.

[0307] Exemplary, combined Fig.49 From the S parameter simulation results in Figure 1, we can see that the deepest point of S11 of the two antennas exceeds -5dB, and the bandwidth is sufficient to cover an operating frequency band. Correspondingly, the worst point of S21 is close to -15dB. This isolation can also meet the isolation requirement between the two antennas in electronic equipment (worst -10dB), so it can be confirmed that the above Fig.47 The two magnetic current loop antennas shown in (b) can form a high-isolation antenna pair with good radiation performance.

[0308] In the above description of the orthogonal distribution, the antenna arranged on the side is located at both ends (such as the top or bottom of the side of the mobile phone) as an example. In other embodiments of the present application, the side antenna can also be arranged at the center of the side.

[0309] Exemplary, combined Fig.50 .like Fig.46 As shown in (a) of FIG. 1 , in the case where the high isolation antenna pair includes two current loop antennas, the current loop antenna E32 disposed on the side may be disposed at the center position (or close to the center position) of the side. Similarly, Fig.50 As shown in (b), in the case where the high isolation antenna pair includes two magnetic current ring antennas, the magnetic current ring antenna M32 arranged on the side can be arranged at the center position of the side (or close to the center position).

[0310] Combination Fig.51 , showing the above Fig.50 FIG. 1 is a schematic diagram of a simulation of the directional pattern of an orthogonally distributed high-isolation antenna pair composed of two magnetic flux ring antennas shown in (b). It can be seen that the magnetic flux ring antenna M31 set in the top center can still produce a transverse spatial field distribution. Correspondingly, the magnetic flux ring antenna M32 set in the middle position of the side can respectively excite a spatial field distribution close to the longitudinal direction in the upper and lower areas of the electronic device, thereby enabling the magnetic flux ring antenna M31 and the magnetic flux ring antenna M32 to excite orthogonal spatial field distributions to obtain high isolation characteristics. In addition, similar to the above description, since the magnetic flux ring antenna M31 and the magnetic flux ring antenna M32 themselves have good radiation characteristics, the device has the following characteristics: Fig.50 The high isolation antenna pair shown in (b) also has good radiation performance.

[0311] Combination Fig.52 , showing the above Fig.50 (b) shows the S parameter simulation of the orthogonal high isolation antenna pair composed of two magnetic flux ring antennas. It can be seen that after the magnetic flux ring antenna M32 is moved to the center of the side, S11 has been significantly improved, and the deepest point has exceeded -20dB. In addition, due to the enhanced orthogonality of the radiation pattern, the dual-port isolation has also been improved, and the worst point has reached about -20dB.

[0312] With Fig.50 Similarly, the above has Fig.50 The high isolation antenna pair shown in (a) can also obtain similar high isolation characteristics and good radiation performance.

[0313] In the actual application of the orthogonal high isolation antenna pair, the position of the side current loop antenna / magnetic current loop antenna can be flexibly set according to the needs of the specific environment to obtain high isolation characteristics.

[0314] The above descriptions of the orthogonally distributed high-isolation antenna scheme are all described by taking an antenna pair including two antennas in the antenna scheme as an example. In other embodiments of the present application, the orthogonally distributed high-isolation antenna scheme may also include more antennas. Exemplarily, the orthogonally distributed high-isolation antenna scheme may be provided with a high-isolation antenna group including three or more antennas. The high-isolation antenna group may include two or more antennas to form a distributed antenna structure. The distributed antenna structure can form a high isolation effect with other antennas in the high-isolation antenna group.

[0315] Exemplary, combined Fig.53A , which is a schematic diagram of some orthogonally distributed high-isolation antenna groups provided in an embodiment of the present application.

[0316] like Fig.53A As shown in (a), the high isolation antenna group in this example may include three antennas. The three antennas are respectively a current loop antenna E33 arranged in the middle position of the top, a magnetic current loop antenna M33 arranged on the long side on the left (such as the upper end on the left), and a magnetic current loop antenna M34 arranged on the long side on the right (such as the upper end on the right). Two magnetic current loop antennas (such as magnetic current loop antenna M33 and magnetic current loop antenna M34) adopt symmetrical feeding (equal amplitude and phase) to form a single-port distributed antenna structure 5. This distributed antenna structure 5 forms a dual-port antenna structure with the current loop antenna E33 located in the middle. Exemplarily, the magnetic current loop antenna M33 is fed by a feeding signal f5. In addition, the magnetic current loop antenna M34 can also be fed by the feeding signal f5. Thereby, symmetrical feeding of the magnetic current loop antenna M33 and the magnetic current loop antenna M34 is achieved. In addition, the current loop antenna E33 can also be fed by a feeding signal f6. Thereby, the distributed antenna structure 5 can form a high isolation effect with the current loop antenna E33.

[0317] In other embodiments, Fig.53AAs shown in (b), the high isolation antenna group in this example may include three antennas. The three antennas are respectively a current loop antenna E36 arranged in the middle position of the top, a current loop antenna E34 arranged on the long side on the left (such as the upper end of the left side), and a current loop antenna E35 arranged on the long side on the right (such as the upper end of the right side). Two current loop antennas (such as current loop antenna E34 and current loop antenna E35) are symmetrically fed (equal amplitude and in phase) to form a single-port distributed antenna structure 6. This distributed antenna structure 6 forms a dual-port antenna structure with the current loop antenna E36 located in the middle. Exemplarily, the current loop antenna E34 is fed by the feeding signal f7. In addition, the current loop antenna E35 can also be fed by the feeding signal f7. Thereby, symmetrical feeding of the current loop antenna E34 and the current loop antenna E35 is achieved. In addition, the current loop antenna E36 can also be fed by the feeding signal f8. Thereby, the distributed antenna structure 6 can form a high isolation effect with the current loop antenna E36.

[0318] The following Fig.53A Take the structural diagram of (a) as an example, combined with Fig.54 and Fig.55 Its high isolation characteristics and good radiation performance are demonstrated through far-field radiation pattern and S parameter simulation.

[0319] Combination Fig.53B , showing that Fig.53A Schematic diagram of the current of the antenna group composed of the structure (a) in FIG. Combined with the above analysis, when the magnetic flux ring antenna is set at the end of the edge, the transverse component and longitudinal component of the floor current excited by it are both more significant. Fig.53B As shown, the magnetic current ring antenna M33 can excite the current to the lower right, and the magnetic current ring antenna M34 can excite the current to the lower left. Then, when the magnetic current ring antenna M33 and the magnetic current ring antenna M34 work simultaneously for symmetrical feeding, the horizontal components of the floor current they excite have a canceling effect because they are in opposite directions. The vertical components can be superimposed on each other because they are in the same direction. In this way, when the magnetic current ring antenna M33 and the magnetic current ring antenna M34 work simultaneously, they can jointly excite the longitudinal current on the floor. The longitudinal current has a good orthogonal effect with the transverse current excited by the current loop antenna E33. This provides a high isolation effect.

[0320] Fig.54 Shows that there is Fig.53A The structure of (a) shows the far-field radiation pattern distribution of the antenna scheme when it is working.

[0321] Fig.55 Shows that there is Fig.53AThe schematic diagram of the S parameter simulation of the antenna scheme in the structure of (a) in operation. It can be seen that the deepest point of S11 of the distributed antenna structure 5 composed of the current loop antenna E33, the magnetic current loop antenna M33 and the magnetic current loop antenna M34 exceeds -10dB, and its bandwidth is sufficient to cover at least one working frequency band. Correspondingly, from the perspective of isolation, the worst point of isolation of the two antenna structures is also lower than -40dB, so they have good isolation.

[0322] The following Fig.53A Take the structural diagram of (b) as an example, combined with Fig.56 and Fig.57 Its high isolation characteristics and good radiation performance are demonstrated through far-field radiation pattern and S parameter simulation.

[0323] Fig.56 Shows that there is Fig.53A The structure of (b) shows the far-field radiation pattern distribution of the antenna scheme when it is working.

[0324] Fig.57 Shows that there is Fig.53A The S parameter simulation diagram of the antenna scheme in the structure diagram (b) in FIG. 1 is shown. It can be seen that the deepest points of S11 of the current loop antenna E36 and the distributed antenna structure 6 are both close to -10dB, and their bandwidths are sufficient to cover at least one operating frequency band. Correspondingly, from the perspective of isolation, the worst isolation points of the two antenna structures are also lower than -40dB, so they have good isolation.

[0325] Above Figure 53A-Figure 57 The feeding method of the high isolation antenna group composed of multiple orthogonally distributed antennas is symmetrical feeding, that is, the multiple antennas in the high isolation antenna group can be fed with equal amplitude and phase at the same time.

[0326] The embodiment of the present application also provides another type of high-isolation antenna group composed of multiple orthogonally distributed antennas. Different antennas in the high-isolation antenna group (distributed antenna structure) can be fed anti-symmetrically to obtain high isolation characteristics.

[0327] Exemplary, reference Fig.58A , which is a schematic diagram of the composition of two high isolation antenna groups provided in an embodiment of the present application. The two high isolation antenna groups can obtain high isolation characteristics through anti-symmetric feeding.

[0328] like Fig.58AAs shown in (a), the high isolation antenna group may include three antennas. For example, a magnetic current ring antenna M35 is arranged at the center of the short side of the electronic device, and a magnetic current ring antenna M36 and a magnetic current ring antenna M37 are arranged at any same end (such as the top of the long side) of the two ends of the long side of the electronic device. When working, the magnetic current ring antenna M36 and the magnetic current ring antenna M37 adopt anti-symmetric feeding (equal amplitude and anti-phase) to form a single-port distributed antenna structure 7. This formed single-port structure 7 forms a dual-port antenna structure with the current loop antenna M35 located in the middle, and the distributed structure 7 and the magnetic current ring antenna M35 can form a high isolation effect. Exemplarily, the magnetic current ring antenna M36 can be fed by a feeding signal f9, and the magnetic current ring antenna M37 can also be fed by a signal with equal amplitude and anti-phase to the feeding signal f9 (such as obtained by an inverter), thereby realizing anti-symmetric feeding of the magnetic current ring antenna M36 and the magnetic current ring antenna M37. In addition, the magnetic current ring antenna M35 can also be fed by a feeding signal f10.

[0329] like Fig.58A As shown in (b) in the figure, the high isolation antenna group may include three antennas. For example, a magnetic current loop antenna M38 is arranged at the center of the short side of the electronic device, and a current loop antenna E37 and a current loop antenna E38 are arranged at any same end (such as the top of the long side) at both ends of the long side of the electronic device. When working, the current loop antenna E37 and the current loop antenna E38 adopt antisymmetric feeding (equal amplitude and antiphase) to form a single-port distributed antenna structure 8. This formed single-port structure 8 forms a dual-port antenna structure with the magnetic current loop antenna M38 located in the middle. The distributed structure 8 and the magnetic current loop antenna M38 can form a high isolation effect. Exemplarily, the current loop antenna E37 can be fed by a feeding signal f11, and the current loop antenna E38 can also be fed by a signal with equal amplitude and antiphase to the feeding signal f11 (such as obtained by an inverter), thereby realizing antisymmetric feeding of the current loop antenna E37 and the current loop antenna E38. In addition, the magnetic current loop antenna M38 can also be fed by a feeding signal f12.

[0330] The effect of the above solution is explained below with reference to the directional diagram and S parameter simulation examples.

[0331] For example, Fig.58B It shows that Fig.58A Schematic diagram of current simulation of high isolation antenna group shown in (a). It can be seen that the distributed antenna structure composed of anti-symmetrically fed magnetic flux ring antenna M36 and magnetic flux ring antenna M37 can obtain transverse current distribution. Correspondingly, the magnetic flux ring antenna M35 set in the middle of the short side can excite the longitudinal current on the floor. Thereby, two orthogonal current distributions are excited to obtain high isolation characteristics.

[0332] Combination Fig.59 and Fig.60 , for having Fig.58A The performance simulation example of the high isolation antenna group shown in (a) is shown in FIG. Fig.59 This is a far-field pattern. Fig.60 The S parameter simulation shows that the worst isolation is below -35dB, so it can meet the high isolation requirement. In addition, from the perspective of S11, the deepest points of S11 of the magnetic flux ring antenna M35 and the distributed antenna structure 7 are both over -10dB, and the bandwidth can also meet the coverage requirements of at least one working frequency band. Fig.58A The high isolation antenna group of the structure shown in (a) can also provide better radiation performance and better isolation.

[0333] It should be noted that the above Fig.58A In the example (a) of FIG. 1 , the magnetic flux ring antenna on the side is set at one of the two ends of the side. In other embodiments of the present application, when the magnetic flux ring antenna is set at the side, it can also be set at a portion other than one of the two ends. For example, the magnetic flux ring antenna can be set near the center of the long side of the side. Exemplarily, combined with Fig.61 , taking the high isolation antenna group as an example, the magnetic flux ring antenna M35 is arranged at the center of the short side of the electronic device, and the magnetic flux ring antenna M36 and the magnetic flux ring antenna M37 are arranged near the middle of the long side of the electronic device. That is to say, compared with Fig.58A In example (a), in this example, the position of the magnetic flux ring antenna arranged on the left side and / or the right side can be moved downward to near the center of the long side.

[0334] When working, the feeding signal fed into the magnetic current ring antenna M36 and the magnetic current ring antenna M37 can be an antisymmetric feeding signal. For example, the magnetic current ring antenna M36 is fed by the feeding signal f9, and the magnetic current ring antenna M37 can also be fed by a signal of equal amplitude and antiphase to the feeding signal f9 (such as obtained by an inverter). The magnetic current ring antenna M35 can also be fed by the feeding signal f10. Thereby, the high isolation characteristics of the working mode of the distributed antenna composed of the magnetic current ring antenna M36 and the magnetic current ring antenna M37 and the magnetic current ring antenna M35 are obtained.

[0335] For example, Fig.62 It shows that Fig.61 The far-field radiation pattern of the high isolation antenna group of the structure shown in FIG. Fig.63The S parameter simulation shown in the figure shows that the worst isolation of the magnetic flux ring antenna M35 and the distributed antenna structure 8 exceeds -80dB, thus meeting the requirements of high isolation characteristics. In addition, as shown in the simulation results of S11, it can be seen that the deepest point of the magnetic flux ring antenna M35 and the distributed antenna structure 8 exceeds -10dB, and the bandwidth is sufficient to cover at least one operating frequency band.

[0336] That is to say, the distributed high isolation antenna group provided in the embodiment of the present application can obtain high isolation characteristics regardless of whether the side magnetic flux ring antenna is set at the side end or the center. Fig.58A The above conclusion still holds true for the high isolation antenna group consisting of two current loop antennas and one magnetic current loop antenna shown in (b) of FIG. Fig.58A The operation of the high isolation antenna group of the structure shown in (b) is explained.

[0337] Exemplary, combined Fig.64 and Fig.65 , for having Fig.58A The performance simulation example of the high isolation antenna group shown in (b) is shown in FIG. Fig.64 This is a far-field pattern. Fig.65 The S parameter simulation shows that the worst isolation is below -35dB, so it can meet the high isolation requirement. In addition, from the perspective of S11, the deepest points of S11 of the magnetic flux ring antenna M38 and the distributed antenna structure 9 are both above or close to -10dB, and the bandwidth can also meet the coverage requirements of at least one working frequency band. Fig.58A The high isolation antenna group of the structure shown in (b) can provide better radiation performance and better isolation under the excitation of the antisymmetric feeding signal.

[0338] Through the above Figure 47-Figure 65 With the description, those skilled in the art should be able to have an accurate understanding of the composition characteristics of the orthogonally distributed high-isolation antenna pair / antenna group provided in this application and the effects that can be obtained. It should be noted that, similar to the introduction of the aforementioned series distribution and parallel distribution schemes, in the orthogonal distribution scheme, the current loop antenna and the magnetic current loop antenna can also have a structure different from that in the above examples, and the feeding form can also be coupled feeding different from direct feeding. The effects that can be achieved are similar and will not be repeated here.

[0339] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A high-isolation terminal antenna system, characterized in that: Applied to electronic equipment, the terminal antenna system includes a first antenna and a second antenna, and the first antenna and the second antenna include at least one current loop antenna or a magnetic current loop antenna; When the first antenna is working, the direction of exciting the floor current includes a first direction, and when the second antenna is working, the direction of exciting the floor current includes a second direction, and the first direction and the second direction are orthogonal.

2. The terminal antenna system according to claim 1, characterized in that: When the current loop antenna is working, a uniform magnetic field is distributed between the current loop antenna and the reference ground; When the magnetic current loop antenna is working, a uniform electric field is distributed between the magnetic current loop antenna and the reference ground.

3. The terminal antenna system according to claim 1 or 2, characterized in that: The current loop antenna comprises a current loop wire antenna or a current loop slot antenna, the radiator of the current loop wire antenna is connected in parallel with at least one grounded first capacitor, and the radiator of the current loop slot antenna is connected in series with at least one second capacitor; The magnetic current loop antenna includes a magnetic current loop wire antenna or a magnetic current loop slot antenna, the radiator of the magnetic current loop wire antenna is connected in parallel with at least one grounded first inductor, and the radiator of the magnetic current loop slot antenna is connected in series with at least one second inductor.

4. The terminal antenna system according to claim 3, characterized in that: The first capacitor is used to adjust the current distribution on the current loop antenna to obtain a uniform magnetic field between the current loop antenna and the reference ground, and the second capacitor is used to adjust the current distribution on the current loop slot antenna to obtain a uniform magnetic field between the current loop slot antenna and the reference ground.

5. The terminal antenna system according to claim 3 or 4, characterized in that: The first inductor is used to adjust the current distribution on the magnetic current loop antenna to obtain a uniform electric field between the magnetic current loop antenna and the reference ground, and the second inductor is used to adjust the current distribution on the magnetic current ring slot antenna to obtain a uniform electric field between the magnetic current ring slot antenna and the reference ground.

6. The terminal antenna system according to any one of claims 1 to 5, characterized in that: The current loop antenna includes a current loop monopole antenna or a current loop dipole antenna; The current loop slot antenna includes a current loop left-hand antenna or a current loop slot antenna.

7. The terminal antenna system according to any one of claims 1 to 6, characterized in that: The magnetic current loop antenna includes a magnetic current loop monopole antenna or a magnetic current loop dipole antenna; The magnetic flux ring slot antenna includes a magnetic flux ring left-hand antenna or a magnetic flux ring slot antenna.

8. The terminal antenna system according to any one of claims 1 to 7, characterized in that: The first antenna and the second antenna are in a direct-feed feeding form, or, The first antenna and the second antenna are fed in a coupled feeding manner.

9. The terminal antenna system according to any one of claims 1 to 8, characterized in that: The first antenna and the second antenna are arranged on two adjacent sides of the electronic device.

10. The terminal antenna system according to claim 9, characterized in that: The first antenna is a current loop antenna, and the second antenna is any one of the following: Differential mode line antenna, common mode slot antenna, current loop antenna; or, The first antenna is a magnetic flux ring antenna, and the second antenna is any one of the following: Common mode line antenna, differential mode slot antenna, magnetic flux ring antenna.

11. The terminal antenna system according to any one of claims 1 to 8, characterized in that: The first antenna and the second antenna are arranged on the same side of the electronic device, or, The first antenna and the second antenna are arranged on two opposite sides of the electronic device.

12. The terminal antenna system according to claim 11, characterized in that: The first antenna is a current loop antenna, and the second antenna is any one of the following: Common mode line antenna, differential mode slot antenna, magnetic flux ring antenna; or, The first antenna is a magnetic flux ring antenna, and the second antenna is any one of the following: Differential mode line antenna, common mode slot antenna, current loop antenna.

13. The terminal antenna system according to claim 11 or 12, characterized in that: The first antenna and the second antenna are arranged on the same side of the electronic device, comprising: The first antenna and the second antenna are arranged on a first side of the electronic device, and projections of the first antenna and the second antenna on the first side do not overlap with each other.

14. The terminal antenna system according to claim 13, characterized in that: When the first antenna and the second antenna are in direct-feed feeding form, The feeding point of the first antenna is arranged on the first antenna, close to one end of the second antenna; the feeding point of the second antenna is arranged on the second antenna, close to one end of the first antenna; or, The feeding point of the first antenna is arranged on the first antenna, away from one end of the second antenna; the feeding point of the second antenna is arranged on the second antenna, away from one end of the first antenna.

15. The terminal antenna system according to claim 13 or 14, characterized in that: The terminal antenna system further includes a third antenna, which is also arranged on the first side; Projections of the radiators of the third antenna, the first antenna, and the second antenna in a direction perpendicular to the first direction do not overlap, and the second antenna is arranged between the first antenna and the third antenna.

16. The terminal antenna system according to claim 15, characterized in that: The first antenna is a magnetic current loop antenna, the second antenna is an electric current loop antenna, and the third antenna is a magnetic current loop antenna.

17. The terminal antenna system according to claim 15 or 16, characterized in that: The first antenna and the third antenna form a first distributed antenna pair, the first distributed antenna pair includes a first port, the first port is connected to a port of the first antenna and a port of the third antenna, When the terminal antenna system is working, feeding signals with equal amplitude and phase are input to the first antenna and the third antenna respectively through the first port.

18. The terminal antenna system according to claim 11 or 12, characterized in that: The first antenna and the second antenna are arranged on the same side of the electronic device, comprising: The first antenna and the second antenna are arranged on a first side of the electronic device, and projections of the first antenna and the second antenna on the first side at least partially overlap.

19. The terminal antenna system according to claim 18, characterized in that: The planes where the radiators of the first antenna and the second antenna are located are orthogonal.

20. The terminal antenna system according to claim 11 or 12, characterized in that: The first antenna and the second antenna are arranged on two opposite sides of the electronic device, and include: The first antenna is arranged at a first position on a first side of the electronic device, and the second antenna is arranged at a second position on a second side of the electronic device. The first side and the second side are respectively adjacent to a third side of the electronic device.

21. The terminal antenna system according to claim 20, characterized in that: The first position and the second position are axially symmetric about a midline of the third side.

22. The terminal antenna system according to claim 20 or 21, characterized in that: The first position is located at a middle position of the first side, and the second position is located at a middle position of the second side.

23. The terminal antenna system according to claim 18 or 19, characterized in that: When the first antenna and the second antenna are in direct-feed feeding form, The feeding point of the first antenna is set on the radiator of the first antenna, the feeding point of the second antenna is set on the radiator of the second antenna, and the feeding point of the first antenna and the feeding point of the second antenna are respectively set on the same side of the radiator of the first antenna and the radiator of the second antenna.

24. A high-isolation terminal antenna system, characterized in that: Applied to electronic equipment, the terminal antenna system includes a first antenna and a second antenna, and the first antenna and the second antenna include at least one current loop antenna or a magnetic current loop antenna; The first antenna and the second antenna are arranged on the same side of the electronic device, or, The first antenna and the second antenna are arranged on two opposite sides of the electronic device; Wherein, when the current loop antenna is a current loop monopole antenna or a current loop dipole antenna, at least one end of the current loop antenna radiator is provided with a first capacitor grounded; When the current loop antenna is a current loop slot antenna or a current loop left-hand antenna, at least one second capacitor is serially arranged on the radiator of the current loop antenna; The capacitance ranges of the first capacitor and the second capacitor are set as follows: When the operating frequency band of the current loop antenna is 450MHz-1GHz, the capacitance of the first capacitor or the second capacitor is set within [1.5pF, 15pF]; when the operating frequency band of the current loop antenna is 1GHz-3GHz, the capacitance of the first capacitor or the second capacitor is set within [0.5pF, 15pF]; when the operating frequency band of the current loop antenna is 3GHz-10GHz, the capacitance of the first capacitor or the second capacitor is set within [1.2pF, 12pF]; When the magnetic flux ring antenna is a magnetic flux ring monopole antenna or a magnetic flux ring dipole antenna, at least one end of the magnetic flux ring antenna radiator is provided with a first inductor grounding; When the magnetic flux loop antenna is a magnetic flux loop slot antenna or a magnetic flux loop left-hand antenna, at least one second inductor is arranged in series on the radiator of the magnetic flux loop antenna; The inductance ranges of the first inductor and the second inductor are set as follows: When the operating frequency band of the magnetic flux loop antenna is 450MHz-1GHz, the inductance value of the first inductor or the second inductor is set within [5nH, 47nH]; when the operating frequency band of the magnetic flux loop antenna is 1GHz-3GHz, the inductance value of the first inductor or the second inductor is set within [1nH, 33nH]; when the operating frequency band of the magnetic flux loop antenna is 3GHz-10GHz, the inductance value of the first inductor or the second inductor is set within [0.5nH, 10nH].

25. The terminal antenna system according to claim 24, characterized in that: When the first antenna is a magnetic current loop antenna, the second antenna is a current loop antenna.

26. The terminal antenna system according to claim 24 or 25, characterized in that: The first antenna and the second antenna are arranged on the same side of the electronic device, comprising: The first antenna and the second antenna are arranged on a first side of the electronic device, and projections of the first antenna and the second antenna on the first side do not overlap with each other.

27. The terminal antenna system according to claim 26, characterized in that: The terminal antenna system further includes a third antenna, which is also arranged on the first side; The projections of the radiators of the third antenna, the first antenna, and the second antenna on the first side do not overlap, and the second antenna is arranged between the first antenna and the third antenna.

28. The terminal antenna system according to claim 27, characterized in that: The first antenna is a magnetic current loop antenna, the second antenna is an electric current loop antenna, and the third antenna is a magnetic current loop antenna.

29. The terminal antenna system according to claim 24 or 25, characterized in that: The first antenna and the second antenna are arranged on the same side of the electronic device, comprising: The first antenna and the second antenna are arranged on a first side of the electronic device, and projections of the first antenna and the second antenna on the first side at least partially overlap.

30. The terminal antenna system according to claim 29, characterized in that: When the first antenna is a current loop antenna, the second antenna is any one of the following antennas: Magnetic flux ring antenna, common mode line antenna, differential mode slot antenna.

31. The terminal antenna system according to claim 24 or 25, characterized in that: The first antenna and the second antenna are arranged on two opposite sides of the electronic device, and include: The first antenna is arranged at a first position on a first side of the electronic device, and the second antenna is arranged at a second position on a second side of the electronic device, the first side and the second side are respectively adjacent to a third side of the electronic device, wherein the first position and the second position are axially symmetrical about a midline of the third side.

32. The terminal antenna system according to claim 31, characterized in that: The first position is located at a middle position of the first side, and the second position is located at a middle position of the second side.

33. An electronic device, characterized in that: The electronic device is provided with at least one processor, a radio frequency module, The electronic device further comprises a terminal antenna system as claimed in any one of claims 1 to 23; or a terminal antenna system as claimed in any one of claims 24 to 32; When the electronic device transmits or receives a signal, it transmits or receives the signal through the radio frequency module and the terminal antenna system.

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