A terminal antenna

Abstract

The embodiment of the application discloses a terminal antenna, relates to the technical field of antennas, and can make the antenna provide better radiation performance under the same environmental condition. The specific scheme is as follows: the antenna comprises a radiation branch, the radiation branch comprises a first radiator, the first end of the first radiator is electrically connected with a reference ground, and a first inductor is connected in series on the first radiator. When the terminal antenna is directly fed through a feed point, the second end of the first radiator is electrically connected with the feed point through a left-hand capacitor. When the terminal antenna is coupled feeding, the second end of the first radiator is grounded through the left-hand capacitor. The terminal antenna further comprises a feed branch, the feed branch is not connected with the radiation branch, the feed branch is arranged between the radiation branch and the reference ground, a feed point is arranged on the feed branch, and the feed branch is used for coupling feeding to the radiation branch.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, and in particular to a terminal antenna, such as a magnetic current loop left-handed antenna. BACKGROUND

[0002] With the development of electronic devices, the environment in which the antennas can be arranged in the electronic devices is getting worse. Therefore, the existing antenna forms have gradually failed to meet the demand of the electronic devices for wireless communication quality.

[0003] In order to better adapt to the demand of the current electronic devices for wireless communication, a new antenna form based on a new working mechanism different from the existing antenna is needed. SUMMARY

[0004] The embodiments of the present application provide a terminal antenna, which provides a new working mechanism and can provide better radiation performance under the same environmental conditions. For example, the terminal antenna has better bandwidth, radiation efficiency, system efficiency, lower SAR and better directional diagram. The terminal antenna can be excited by direct feeding or coupling feeding.

[0005] In order to achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, a terminal antenna is provided, which includes a radiation branch, the radiation branch including a first radiator, a first end of the first radiator being electrically connected to a reference ground, and a first inductor being connected in series to the first radiator. When the terminal antenna is directly fed through a feeding point, a second end of the first radiator is electrically connected to the feeding point through a left-handed capacitor. When the terminal antenna is coupled fed, the second end of the first radiator is grounded through the left-handed capacitor. The terminal antenna further includes a feeding branch, the feeding branch being not connected to the radiation branch, the feeding branch being arranged between the radiation branch and the reference ground, and a feeding point being arranged on the feeding branch, the feeding branch being used for coupling feeding to the radiation branch.

[0007] Based on the scheme, an antenna with a new working mechanism is provided. For example, since the terminal antenna can form a closed magnetic current loop during operation, it can be referred to as a magnetic current loop antenna. In the present example, the magnetic current loop antenna can be obtained based on the improvement of the existing left-handed antenna. In some embodiments, the magnetic current loop left-handed antenna can be fed in the form of direct feeding. In other embodiments, the magnetic current loop left-handed antenna can also be fed in the form of coupling feeding. The magnetic current loop left-handed antenna provided by the embodiments of the present application can provide better radiation performance compared to other existing antennas, such as left-handed antennas, under the same environment. For example, the radiation efficiency is higher, the system efficiency is also correspondingly higher, the bandwidth and the directional diagram are significantly improved, and in addition, the SAR value can be lower.

[0008] In a possible design, when the operating frequency range of the antenna is 450 MHz-1 GHz, the inductance of the first inductor is set to be within [5 nH, 47 nH]. When the operating frequency range of the antenna is 1 GHz-3 GHz, the inductance of the first inductor is set to be within [1 nH, 33 nH]. When the operating frequency range of the antenna is 3 GHz-10 GHz, the inductance of the first inductor is set to be within [0.5 nH, 10 nH]. Based on this scheme, the range of the grounding inductor is defined. Within the defined range, the antenna can generate a more uniform electric field when operating, thereby improving the radiation performance.

[0009] In a possible design, the feeding branch includes a first feeding part, the feeding point is connected at the center of the first feeding part, and both ends of the first feeding part are suspended. Based on this scheme, a possible implementation of the feeding branch in the coupled feeding scenario is provided. The feeding branch with this structure can effectively excite the radiation branch in the above examples to radiate with the current loop antenna radiation characteristics.

[0010] In a possible design, the feeding branch includes a second feeding part, both ends of the second feeding part are grounded through inductors respectively, and the feeding point is connected in series on the second feeding part. Based on this scheme, a possible implementation of the feeding branch in the coupled feeding scenario is provided. The feeding branch with this structure can effectively excite the radiation branch in the above examples to radiate with the current loop antenna radiation characteristics.

[0011] In a possible design, the feeding branch includes a third feeding part, and the feeding point is connected at one end of the third feeding part. Based on this scheme, a possible implementation of the feeding branch in the coupled feeding scenario is provided. The feeding branch with this structure can effectively excite the radiation branch in the above examples to radiate with the current loop antenna radiation characteristics.

[0012] In a possible design, the other end of the third feeding part is suspended. Based on this scheme, a possible implementation of the feeding branch in the coupled feeding scenario is provided. The feeding branch with this structure can effectively excite the radiation branch in the above examples to radiate with the current loop antenna radiation characteristics.

[0013] In a possible design, the other end of the third feeding part is grounded through a third inductor. Based on this scheme, a possible implementation of the feeding branch in the coupled feeding scenario is provided. The feeding branch with this structure can effectively excite the radiation branch in the above examples to radiate with the current loop antenna radiation characteristics.

[0014] In a possible design, the third feeding part is grounded at the end away from the feeding point. A slit is arranged on the third feeding part, which divides the third feeding part into two parts that are not connected to each other. Based on this scheme, a possible implementation of the feeding branch in a coupled feeding scenario is provided. The feeding branch with this structure can effectively excite the radiation branch in the above examples to radiate with the current loop antenna radiation characteristics.

[0015] In a possible design, the third feeding part is grounded at the end away from the feeding point. A fourth inductor is arranged in series on the third feeding part. Based on this scheme, a possible implementation of the feeding branch in a coupled feeding scenario is provided. The feeding branch with this structure can effectively excite the radiation branch in the above examples to radiate with the current loop antenna radiation characteristics.

[0016] In a possible design, the terminal antenna has different port impedances corresponding to feeding branches of different sizes. Based on this scheme, a scheme example for adjusting the port impedance of the magnetic current loop antenna is provided. For example, the port impedance of the terminal antenna can be adjusted by adjusting the size of the feeding branch.

[0017] In a possible design, when the terminal antenna is working, the radiation branch and the reference ground are distributed with uniform electric field. Based on this scheme, an example of the electric field distribution characteristics of the magnetic current loop antenna is provided. It can be understood that an antenna with this electric field distribution characteristic should be included in the magnetic current loop antenna provided in the embodiments of the present application.

[0018] In a possible design, when the terminal antenna is working, the radiation body is distributed with reverse current. Based on this scheme, an example of the current distribution characteristics of the magnetic current loop antenna is provided. It can be understood that the existing left-handed antenna will not generate reverse current on the radiation body when working in the 1 / 4 wavelength mode. However, in this example, the magnetic current loop left-handed antenna is provided with at least two grounding inductors, so that even when working in the 1 / 4 wavelength mode, the radiation body is distributed with reverse current.

[0019] In a possible design, one or more inductors are arranged in series on the first radiation body. When a plurality of inductors are arranged in series on the first radiation body, at least two inductors are arranged apart from the radiation body. Based on this scheme, an enhanced design scheme of the magnetic current loop left-handed antenna is provided. For example, one or more inductors can be arranged in series on the radiation body, so that the distribution of the electric field between the radiation body and the reference ground is more uniform, thereby achieving the effect of improving the radiation performance of the antenna.

[0020] In a second aspect, an electronic device is provided, which is provided with at least one processor, a radio frequency module, and a terminal antenna as described in the first aspect and any possible design thereof, such as a magnetic current loop left-handed antenna. The electronic device performs signal transmission or reception through the radio frequency module and the terminal antenna when performing signal transmission or reception.

[0021] It should be understood that the technical features of the technical solutions provided in the second aspect above can correspond to the terminal antenna provided in the first aspect and any possible design thereof, and thus similar beneficial effects can be achieved, which will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A schematic diagram of a floor current distribution;

[0023] Figure 2 A schematic diagram of a floor electric field distribution;

[0024] Figure 3 A schematic diagram of an antenna distribution on a floor;

[0025] Figure 4 A schematic diagram of an ILA antenna in operation;

[0026] Figure 5 A schematic diagram of an electronic device provided by an embodiment of the present application;

[0027] Figure 6 A schematic diagram of a metal shell provided by an embodiment of the present application;

[0028] Figure 7 A schematic diagram of an electronic device provided by an embodiment of the present application;

[0029] Figure 8A A schematic diagram of a magnetic current loop antenna provided by an embodiment of the present application;

[0030] Figure 8B A schematic diagram of efficiency simulation of a magnetic current loop antenna provided by an embodiment of the present application;

[0031] Figure 9 A schematic diagram of a magnetic current loop antenna provided by an embodiment of the present application;

[0032] Figure 10 A schematic diagram of a magnetic current loop antenna provided by an embodiment of the present application;

[0033] Figure 11 A schematic diagram of a magnetic current loop antenna provided by an embodiment of the present application;

[0034] Figure 12A S11 simulation schematic diagram under different dielectric loss provided by an embodiment of the application;

[0035] Figure 13 An efficiency simulation schematic diagram under different dielectric loss provided by an embodiment of the application;

[0036] Figure 14 A S11 simulation schematic diagram under different magnetic medium loss provided by an embodiment of the application;

[0037] Figure 15 An efficiency simulation schematic diagram under different magnetic medium loss provided by an embodiment of the application;

[0038] Figure 16 A classification schematic diagram of a magnetic current loop antenna provided by an embodiment of the application;

[0039] Figure 17 A schematic diagram of a magnetic current loop monopole antenna provided by an embodiment of the application;

[0040] Figure 18 A setting schematic diagram of a magnetic current loop monopole antenna in an electronic device provided by an embodiment of the application;

[0041] Figure 19 An electric field simulation schematic diagram of a magnetic current loop monopole antenna provided by an embodiment of the application;

[0042] Figure 20 A S parameter simulation schematic diagram of a magnetic current loop monopole antenna provided by an embodiment of the application;

[0043] Figure 21 An efficiency simulation schematic diagram of a magnetic current loop monopole antenna provided by an embodiment of the application;

[0044] Figure 22 A current simulation schematic diagram of a magnetic current loop monopole antenna provided by an embodiment of the application;

[0045] Figure 23 A current simulation schematic diagram of a magnetic current loop monopole antenna provided by an embodiment of the application;

[0046] Figure 24 A schematic diagram of a magnetic current loop monopole antenna provided by an embodiment of the application;

[0047] Figure 25 A schematic diagram of a magnetic current loop dipole antenna provided by an embodiment of the application;

[0048] Figure 26 A setting schematic diagram of a magnetic current loop dipole antenna in an electronic device provided by an embodiment of the application;

[0049] Figure 27 A magnetic current loop dipole antenna electric field simulation schematic diagram provided for an embodiment of the present application;

[0050] Figure 28 A magnetic current loop dipole antenna S parameter simulation schematic diagram provided for an embodiment of the present application;

[0051] Figure 29 A magnetic current loop dipole antenna efficiency simulation schematic diagram provided for an embodiment of the present application;

[0052] Figure 30 A magnetic current loop dipole antenna schematic diagram provided for an embodiment of the present application;

[0053] Figure 31 A magnetic current loop dipole antenna schematic diagram provided for an embodiment of the present application;

[0054] Figure 32 A magnetic current loop left-handed antenna schematic diagram provided for an embodiment of the present application;

[0055] Figure 33 A magnetic current loop left-handed antenna setting schematic diagram in an electronic device provided for an embodiment of the present application;

[0056] Figure 34 A magnetic current loop left-handed antenna electric field simulation schematic diagram provided for an embodiment of the present application;

[0057] Figure 35 A magnetic current loop left-handed antenna S parameter simulation schematic diagram provided for an embodiment of the present application;

[0058] Figure 36 A magnetic current loop left-handed antenna efficiency simulation schematic diagram provided for an embodiment of the present application;

[0059] Figure 37 A magnetic current loop left-handed antenna schematic diagram provided for an embodiment of the present application;

[0060] Figure 38 A magnetic current loop slot antenna schematic diagram provided for an embodiment of the present application;

[0061] Figure 39 A magnetic current loop slot antenna setting schematic diagram in an electronic device provided for an embodiment of the present application;

[0062] Figure 40 A magnetic current loop slot antenna electric field simulation schematic diagram provided for an embodiment of the present application;

[0063] Figure 41 A magnetic current loop slot antenna S parameter simulation schematic diagram provided for an embodiment of the present application;

[0064] Figure 42 An efficiency simulation schematic diagram of a magnetic current loop slot antenna provided for an embodiment of the present application;

[0065] Figure 43 An efficiency simulation schematic diagram of a magnetic current loop slot antenna provided for an embodiment of the present application;

[0066] Figure 44 An efficiency simulation schematic diagram of a magnetic current loop slot antenna provided for an embodiment of the present application;

[0067] Figure 45 A schematic diagram of a feed branch in a coupled feed scenario provided for an embodiment of the present application;

[0068] Figure 46 A schematic diagram of a coupled feed magnetic current loop monopole antenna provided for an embodiment of the present application;

[0069] Figure 47 A schematic diagram of a coupled feed magnetic current loop monopole antenna provided for an embodiment of the present application;

[0070] Figure 48 A schematic diagram of a coupled feed magnetic current loop monopole antenna provided for an embodiment of the present application;

[0071] Figure 49 A schematic diagram of a coupled feed magnetic current loop monopole antenna provided for an embodiment of the present application;

[0072] Figure 50 A schematic diagram of a coupled feed magnetic current loop monopole antenna provided for an embodiment of the present application;

[0073] Figure 51 A schematic diagram of S11 simulation of a feed branch of different lengths provided for an embodiment of the present application;

[0074] Figure 52 A schematic diagram of Smith chart simulation of a feed branch of different lengths provided for an embodiment of the present application;

[0075] Figure 53 A schematic diagram of efficiency simulation of a feed branch of different lengths provided for an embodiment of the present application;

[0076] Figure 54 A schematic diagram of S parameter simulation of a feed branch in different positions provided for an embodiment of the present application;

[0077] Figure 55 A schematic diagram of efficiency simulation of a feed branch in different positions provided for an embodiment of the present application;

[0078] Figure 56A schematic diagram of a coupled-fed magnetic current loop monopole antenna provided by an embodiment of the present application;

[0079] Figure 57 A schematic diagram of a coupled-fed magnetic current loop dipole antenna provided by an embodiment of the present application;

[0080] Figure 58 A schematic diagram of a coupled-fed magnetic current loop dipole antenna provided by an embodiment of the present application;

[0081] Figure 59 A schematic diagram of a coupled-fed magnetic current loop dipole antenna provided by an embodiment of the present application;

[0082] Figure 60 A schematic diagram of a coupled-fed magnetic current loop dipole antenna provided by an embodiment of the present application;

[0083] Figure 61 A schematic diagram of a coupled-fed magnetic current loop dipole antenna provided by an embodiment of the present application;

[0084] Figure 62 A schematic diagram of a coupled-fed magnetic current loop left-handed antenna provided by an embodiment of the present application;

[0085] Figure 63 A schematic diagram of a coupled-fed magnetic current loop left-handed antenna provided by an embodiment of the present application;

[0086] Figure 64 A schematic diagram of a coupled-fed magnetic current loop left-handed antenna provided by an embodiment of the present application;

[0087] Figure 65 A schematic diagram of a coupled-fed magnetic current loop left-handed antenna provided by an embodiment of the present application;

[0088] Figure 66 A schematic diagram of a coupled-fed magnetic current loop left-handed antenna provided by an embodiment of the present application;

[0089] Figure 67 A schematic diagram of a coupled-fed magnetic current loop slot antenna provided by an embodiment of the present application;

[0090] Figure 68 A schematic diagram of a coupled-fed magnetic current loop slot antenna provided by an embodiment of the present application;

[0091] Figure 69 A schematic diagram of a coupled-fed magnetic current loop slot antenna provided by an embodiment of the present application;

[0092] Figure 70An efficiency simulation schematic diagram of a coupled-fed magnetic current loop slot antenna is provided for an embodiment of the present application.

[0093] Figure 71 An efficiency simulation schematic diagram of a coupled-fed magnetic current loop slot antenna is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0094] An electronic device can realize its wireless communication function by setting one or more antennas.

[0095] Generally, the form of an antenna in an electronic device can be various. For example, the form of an antenna in an electronic device can include a monopole, a dipole, and the like.

[0096] Different forms of antennas have different radiation characteristics. For example, according to the radiation characteristics, an antenna can include an electric field type antenna and a magnetic field type antenna. Antennas with different radiation characteristics need to be matched with the distribution of a floor eigenmode when being set, so as to obtain better radiation performance.

[0097] An exemplary, Figure 1 The current distribution of a floor eigenmode at a low frequency (e.g., 0.85 GHz), a medium frequency (e.g., 1.97 GHz), and a high frequency (e.g., 2.32 GHz) is shown. It can be seen that the current distribution corresponding to the floor eigenmode is different at different frequencies. For example, the stronger current distribution at 0.85 GHz is at both ends of the x direction of the floor. The stronger current distribution at 1.97 GHz converges to the positive direction and the negative direction of the y direction, forming four strong current distribution areas as shown in Figure 1 The stronger current distribution at 2.32 GHz further converges to the positive direction and the negative direction of the y axis, forming two strong current areas at the top and the bottom of the floor as shown in Figure 1 It can be understood that the current corresponds to the magnetic field, that is, a magnetic field type antenna can be set in a region where the current of the floor is strong at a corresponding frequency, so that the antenna can better excite the floor when working, thereby obtaining better radiation performance.

[0098] In addition, Figure 2 The electric field distribution of a floor eigenmode at a low frequency (e.g., 0.85 GHz), a medium frequency (e.g., 1.97 GHz), and a high frequency (e.g., 2.32 GHz) is shown. It can be seen that the electric field distribution corresponding to the floor eigenmode is different at different frequencies. For example, the stronger electric field distribution at 0.85 GHz is at both ends of the y direction of the floor. The stronger electric field distribution at 1.97 GHz is at both ends of the y direction of the floor and the middle region of the y direction of the floor. The stronger electric field distribution at 2.32 GHz tends to the edge and is distributed as shown in Figure 2The four edge regions are shown. It can be understood that the electric field type antenna can be set in the region where the floor electric field is strong at the corresponding frequency, so that the antenna can better excite the floor during operation, thereby obtaining better radiation performance.

[0099] For example, taking the high frequency as the working frequency. The electric field type antenna can be set at positions 1-4 and positions 1'-4' as shown. Figure 3 Thus, the antenna can better excite the floor electric field during operation, thereby obtaining better radiation performance.

[0100] It should be understood that for the electric field type antenna, in addition to the setting position of the antenna on the floor, the radiation characteristics of the antenna itself are also very important for the final radiation performance that can be obtained.

[0101] Experiments have proved that the electric field type antenna capable of forming a uniform electric field can obtain better radiation performance under the condition of limited space and other conditions being the same. However, most of the current electric field type antennas do not have this radiation characteristic.

[0102] For example, taking the inverted-L antenna (ILA) as an example. The ILA antenna can be an implementation of a monopole antenna. The ILA antenna can excite at least one resonance at the corresponding working frequency band based on the size of its radiator during operation. The length of the ILA antenna radiator can correspond to 1 / 4 of the wavelength of the corresponding working frequency band. That is, the ILA antenna can realize the coverage of the working frequency band by working at 1 / 4 wavelength.

[0103] Figure 4 It is a schematic diagram of an ILA antenna. As can be seen, when the ILA antenna works in the 1 / 4 wavelength mode, a current that does not reverse can be generated on the radiator. For example, the current can flow from the end of the ILA antenna to the feed point. It can be understood that the flow of current on the radiator can be caused by the potential difference at different positions on the radiator. For example, when the potential at the end of the radiator is high and the potential near the feed point is low, a current as shown in Figure 4 will be formed.

[0104] The reference ground serves as a zero potential reference. Due to the distribution of different potentials on the radiator, the non-uniform electric field between the radiator of the ILA antenna and the reference ground is also caused. For example, in the scenario as shown in Figure 4 , the electric field near the end of the ILA antenna is strong, and the closer to the feed point, the weaker the electric field.

[0105] Similarly, other electric field type antennas will also produce uneven electric fields due to uneven potential distribution on the radiator, which limits the radiation performance of the antenna.

[0106] To solve the above problems, the magnetic current loop antenna provided in the embodiments of the present application can generate a uniform electric field during operation, thereby obtaining better radiation performance.

[0107] It should be noted that the magnetic current loop antenna scheme provided in the embodiments of the present application can be widely applied in different antenna forms. For example, a magnetic current loop monopole antenna based on a monopole antenna (such as a magnetic current loop ILA antenna), a magnetic current loop dipole antenna based on a dipole antenna, a magnetic current loop left-handed antenna based on a left-handed antenna, a magnetic current loop slot antenna based on a slot antenna, and the like. The structure of the left-handed antenna can refer to CN201380008276.8 and CN201410109571.9, and will not be described here.

[0108] The magnetic current loop antenna scheme provided in the embodiments of the present application and its specific use in different magnetic current loop antennas will be described in detail below in combination with examples and drawings.

[0109] First, the setting environment of the magnetic current loop antenna to which the magnetic current loop antenna scheme provided in the embodiments of the present application is applied will be described.

[0110] The magnetic current loop antenna related in the embodiments of the present application can be applied in a user's electronic device to support the wireless communication function of the electronic device. For example, the electronic device can be a mobile phone, a tablet computer, a personal digital assistant (PDA), an augmented reality (AR) \ virtual reality (VR) device, a media player, and the like portable mobile device, or a smart watch and the like wearable electronic device. The specific form of the device is not specially limited in the embodiments of the present application.

[0111] Please refer to Figure 5 , a structural schematic diagram of an electronic device 500 provided in the embodiments of the present application is shown. As shown in Figure 5 , the electronic device 500 provided in the embodiments of the present application can be sequentially provided with a screen and a cover plate 501, a metal shell 502, an internal structure 503, and a back cover 504 along the z-axis from top to bottom.

[0112] The screen and the cover plate 501 can be used to realize the display function of the electronic device. The metal shell 502 can be used as the main frame of the electronic device 500 to provide rigid support for the electronic device 500. The internal structure 503 can include a collection of electronic components and mechanical components that realize various functions of the electronic device 500. For example, the internal structure 503 can include a shielding cover, screws, reinforcing ribs, and the like. The back cover 504 can be the back appearance surface of the electronic device 500. The back cover 504 can be made of glass, ceramic, plastic, or the like in different implementations.

[0113] The magnetic current loop antenna scheme provided by the embodiments of the present application can be applied to the electronic device 500 as shown in the figure, which is used to support the wireless communication function of the electronic device 500. For example, the magnetic current loop antenna can be arranged on the metal shell 502 of the electronic device 500. For another example, the magnetic current loop antenna can be arranged on the back cover 504 of the electronic device 500. Hereinafter, the magnetic current loop antenna arranged on the metal shell 502 is taken as an example. Figure 5

[0114] As an example, the metal shell 502 has a metal edge frame structure, which is taken as an example, Figure 6 a composition diagram of the metal shell 502 is shown. In this example, the metal shell 502 can be made of a metal material such as an aluminum alloy. As shown in the figure, Figure 6 a reference ground can be arranged on the metal shell 502. The reference ground can 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 various electronic components. As shown in the figure, Figure 6 a metal edge frame can also be arranged around the reference ground. The metal edge frame can be a complete closed metal edge frame, or can be a metal edge frame broken by one or more slits as shown in the figure. Figure 6 For example, in the example as shown in the figure, Figure 6 the metal edge frame can be provided with a slit 1, a slit 2, and a slit 3 at different positions, respectively. These slits can break the metal edge frame to obtain independent metal branches. In some embodiments, part or all of the metal branches can be used as the radiating branches of the antenna, so as to realize structure reuse in the antenna arrangement process and reduce the difficulty of antenna arrangement. When the metal branch is used as the radiating branch of the antenna, the position of the slit arranged at one end or both ends of the metal branch can be flexibly selected according to the arrangement of the antenna.

[0115] For example, in the example as shown in the figure, Figure 6 ​In the shown example, one or more metal pins can also be arranged on the metal frame. In some examples, the metal pins can be provided with screw holes for fixing other structural members by screws. In other examples, the metal pins can be coupled with feeding points, so as to feed the antenna through the metal pins when the metal pins are connected with the metal branches as the radiating branches of the antenna. In other examples, the metal pins can also be coupled with other electronic components to realize corresponding electrical connection functions.

[0116] In the present example, the arrangement of a printed circuit board (PCB) on the metal shell is also shown. For example, the main board and the sub board are designed separately. In other examples, the main board and the 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 for realizing various functions of the electronic device 500. For example, a processor, a memory, a radio frequency module, etc. The 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 example, the sub board can also be used to carry the radio frequency circuit corresponding to the antenna arranged at the bottom (i.e. the y-axis negative direction part of the electronic device) and the like.

[0117] The magnetic current loop antenna provided in the embodiments of the present application can be applied to an electronic device with the composition as shown in Figure 5 or Figure 6 .

[0118] The electronic device 500 in the above examples is only one possible composition. In other embodiments of the present application, the electronic device 500 can also have other compositions. For example, in order to realize the wireless communication function of the electronic device 500, a communication module as shown in Figure 7 may be arranged in the electronic device. The communication module can include an antenna, a radio frequency module for signal interaction with the antenna, and a processor for signal interaction with the radio frequency module. For example, the signal interaction between the radio frequency module and the antenna can be analog signal interaction. The signal interaction between the radio frequency module and the processor can be analog signal or digital signal. In some implementations, the processor can be a baseband processor.

[0119] As shown in Figure 7 , in the present example, the antenna can include different forms. For example, it can include a magnetic current loop antenna.

[0120] For ease of illustration, first, the coordinate setting in the following examples is described. For example, the coordinate setting in the following description is set by taking the back view of the electronic device corresponding to the structure as an example. For example, in the back view of the electronic device, the rear camera module can be located at the upper left corner of the electronic device. Taking the rear camera module as a reference, the horizontal direction away from the rear camera module can be the positive direction of the x-axis, corresponding to the right direction. Conversely, the horizontal direction close to the rear camera module can be the negative direction of the x-axis, corresponding to the left direction. The camera module can be arranged on the part of the electronic device in the positive direction of the vertical y-axis, corresponding to the upward direction. Conversely, the negative direction of the y-axis is opposite to the positive direction of the y-axis, corresponding to the downward direction. Based on the above setting of the x-axis and the y-axis, the positive direction of the z-axis is the direction along the back of the electronic device to the front (i.e. the display screen), corresponding to the inward direction. Conversely, the negative direction of the z-axis is the direction along the front of the electronic device to the back, corresponding to the outward direction. The following description is based on the coordinate system setting in the above example. It should be noted that the coordinate system setting is only for ease of illustration and does not constitute any limitation on the scheme provided by the embodiments of the present application.

[0121] The magnetic current loop antenna provided by the embodiments of the present application is described in detail below.

[0122] The magnetic current loop antenna provided by the embodiments of the present application, due to the setting of the inductor, based on the energy storage characteristics of the inductor for magnetic energy, can generate a closed magnetic current near the antenna, and can generate a closed magnetic current loop in the space near the antenna during operation, and can generate a uniform electric field in the area near the antenna radiator (such as a radiation branch). In the embodiments of the present application, the uniform electric field can be an electric field with the same direction and uniform intensity distribution in a certain space region.

[0123] For example, referring to Figure 8A , the distribution of the electric field and the magnetic current near the magnetic current loop antenna during operation is shown. It should be noted that the example of Figure 8A only illustrates the distribution of the electric field and the magnetic current, and does not constitute any limitation on the structure of the antenna itself and the relative position.

[0124] As Figure 8A shown, the magnetic current loop antenna can include at least one radiation branch. The radiation branch can be used to perform radiation with the radiation characteristics of the magnetic current loop antenna. The radiation characteristics of the magnetic current loop antenna described in the embodiments of the present application can include generating a uniform electric field distribution between the radiation branch and the reference ground. For example, as Figure 8A shown, a uniform downward electric field can be distributed between the antenna radiation branch and the reference ground. Of course, in another scenario, due to the continuous change of the feed signal, the electric field can also be uniformly distributed upward.

[0125] As a possible implementation, the magnetic current loop antenna provided by the embodiment of the present application can be based on the existing electric field type antenna, and an inductor is connected in series and / or parallel with the radiation branch, so that the uniform electric field distribution between the radiation branch and the reference ground is obtained through the energy storage characteristic of the inductor for magnetic energy.

[0126] It should be understood that, in the case of the uniform electric field distribution, a magnetic current loop with a closed characteristic can be formed in the space near the radiation branch. That is, the radiation characteristic of the magnetic current loop antenna involved in the embodiment of the present application can also include that a closed magnetic current loop distribution is generated near the radiation branch. For example, as shown in FIG. 2, near the antenna radiation branch, a closed magnetic current loop in the counterclockwise direction can be formed. Similarly to the description of the electric field distribution above, in another scenario, due to the fact that the feeding signal is in a constant change, the magnetic current loop can also be a clockwise closed distribution. Figure 8A

[0127] Based on the above description of the characteristics in the working process of the magnetic current loop antenna provided by the embodiment of the present application (such as the radiation characteristic of the magnetic current loop antenna), since the magnetic current loop antenna provided by the embodiment of the present application can generate a uniform electric field (or a closed magnetic current loop) for radiation in the working process, in combination with the foregoing description, the magnetic current loop antenna can provide better radiation performance than the general electric field type antenna with a non-uniform electric field. For example, Figure 8B FIG. 3 shows the radiation efficiency and system efficiency of the magnetic current loop antenna provided by the embodiment of the present application. In order to facilitate the description, the efficiency diagram of the existing antenna scheme (such as the left-handed antenna) in the same environment is also provided as a comparison. As shown in FIG. 3, Figure 8B As shown in FIG. 3, the radiation efficiency of the magnetic current loop antenna provided by the embodiment of the present application is higher than that of the left-handed antenna by about 1 dB in the frequency range of 2.2 GHz-3 GHz, and thus better radiation basis can be provided. For example, Figure 8B Corresponding to the antenna design, the system efficiency of the magnetic current loop antenna is also significantly improved compared with the left-handed antenna. For example, at the angle of the peak efficiency, the magnetic current loop antenna is more than -2 dB, while the peak efficiency of the left-handed antenna is close to -5 dB.

[0128] It should be noted that the magnetic current loop antenna provided by the embodiment of the present application can be directly fed by the feeding component (referred to as direct feeding), or can be coupled and fed by setting a feeding branch with certain characteristics. In some embodiments, taking the excitation of the magnetic current loop antenna by the coupled feeding as an example, the feeding branch can be arranged in the uniform electric field region to excite the magnetic current loop antenna. Since the electric field in the region where the feeding branch is located is uniformly distributed, the position of the antenna for the feeding branch is not sensitive, and thus the flexibility of the setting of the feeding branch can be significantly improved.

[0129] ​In different implementations, the magnetic flux loop antennas provided in this application can be classified into different types based on different morphological characteristics. For example, such as... Figure 9 As shown, based on whether or not slots or gaps are provided in the antenna, magnetic flux loop antennas are classified into magnetic flux loop linear antennas and magnetic flux loop slot antennas. As an example, magnetic flux loop linear antennas can include magnetic flux loop monopole antennas based on monopoles, and magnetic flux loop dipole antennas based on dipoles, etc. Magnetic flux loop slot antennas can include magnetic flux loop slot antennas based on slot antennas, and magnetic flux loop left-handed antennas based on left-handed antennas, etc.

[0130] Based on the distribution in the above examples, the following combines... Figure 10 as well as Figure 11 The structural characteristics of different types of magnetic flux loop antennas are illustrated by example.

[0131] For example, refer to Figure 10 This is a schematic diagram of one configuration of a magnetic flux loop antenna provided in an embodiment of this application. To achieve the radiation characteristics of the magnetic flux loop antenna, an inductor L connected in parallel to ground can be added to the radiating stubs of the magnetic flux loop antenna. a .

[0132] It should be understood that for a typical wire antenna, the electric field distribution between the radiating stub and the reference ground is not uniform during operation (e.g., Figure 4 (Example). Embodiments of this application involve adding an inductor L connected in parallel to ground on the radiating stub. a This allows the antenna to generate a uniformly distributed electric field during operation. For example, for the end with a higher potential on the radiating stub (e.g., referred to as end 1), through this L... a This configuration allows the charge corresponding to a higher potential to be introduced to the reference ground nearby, thereby effectively reducing the charge at terminal 1 and thus lowering its potential. Furthermore, for the terminal with a lower potential on the radiating stub (e.g., terminal 2), this L... a Due to the energy storage characteristics of inductors for magnetic energy, when the current in the radiating stub reverses due to changes in the feed signal, the change in current in the radiating stub is delayed compared to the change in voltage. This results in a stronger electric field distribution in the region with a lower electric field distribution (i.e., near terminal 2). For example, while the electric field near terminal 2 strengthens, the electric field near inductor L... a The electric field in the region has not yet shown a significant weakening; therefore, at terminal 2 and inductor L... a A relatively uniformly distributed electric field is obtained between them. Thus, through L... a By configuring the antenna, the electric field near terminal 1 can be weakened while the electric field near terminal 2 can be strengthened. This allows for a relatively uniform electric field distribution between the radiating stub and the reference ground, thus obtaining the radiation characteristics of the magnetic flux loop antenna.

[0133] It should be noted that, as Figure 10 The examples are merely illustrative of the structural features (such as setting L) in a magnetic flux loop antenna to achieve the radiation characteristics of the magnetic flux loop antenna. a This structure does not constitute a structural limitation on the magnetic flux loop antenna itself. For example, in some embodiments, a feed point can be set at one end of the magnetic flux loop antenna to form a direct feed. For example, the feed point can be set by setting a feed component. In the following description of the embodiments of this application, the setting of the feed point by setting a feed component can be simply referred to as coupling with the feed point. In other embodiments, a feed stub can be set between the radiating stub of the magnetic flux loop antenna and the reference ground to form a coupled feed. In other embodiments, a perfect magnetic conductor (PMC) is set at the antenna boundary (such as the magnetic boundary), and the radiating stub radiator of the magnetic flux loop antenna is mirrored on the other side of the PMC to obtain a magnetic flux loop antenna in the form of a magnetic flux loop dipole antenna, etc.

[0134] The magnetic flux loop antenna provided in this example is capable of covering at least one operating frequency band during operation. Exemplarily, this operating frequency band may include a low band (LB), a middle band (MB), and / or a high band (HB). In some embodiments, the low band may include a band range of 450MHz to 1GHz. The middle band may include a band range of 1GHz to 3GHz. The high band may include a band range of 3GHz to 10GHz. It is understood that in different embodiments, the low, middle, and high frequency bands may include, but are not limited to, the operating frequency bands required by 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. As an example, the LB band can cover 450MHz-1GHz, the MB band can cover 1GHz-3GHz, and the HB band can cover 3GHz-10GHz. In some implementations, the LB, MB, and HB can include common frequency bands such as 5G NR, WiFi 6E, and UWB.

[0135] In a specific implementation, the operating frequency band of the magnetic current loop antenna can be adjusted by adjusting the inductance value of the inductor coupled to the ground of the magnetic current loop antenna, and / or the length of the radiator of the magnetic current loop antenna.

[0136] For example, when the magnetic current loop antenna operates at LB, the inductance value of the inductor coupled to the ground of the magnetic current loop antenna can be in the range of 5nH to 47nH. a For example, when the magnetic current loop antenna operates at MB, the inductance value of the inductor coupled to the ground of the magnetic current loop antenna can be in the range of 1nH to 33nH. a For example, when the magnetic current loop antenna operates at HB, the inductance value of the inductor coupled to the ground of the magnetic current loop antenna can be in the range of 0.5nH to 10nH. a For example, when the magnetic current loop antenna operates at LB, the inductance value of the inductor coupled to the ground of the magnetic current loop antenna can be in the range of 5nH to 47nH.

[0137] In some embodiments of the present application, one or more inductors can be connected in series to the radiator of the magnetic current loop antenna, so that the electric field during the operation of the antenna is more uniform, thereby improving the radiation efficiency of the antenna.

[0138] For example, when the magnetic current loop antenna operates at LB, the inductance value of the inductor coupled to the ground of the magnetic current loop antenna can be in the range of 5nH to 47nH.

[0139] It can be seen that in the examples provided by the embodiments of the present application, the inductance value of the inductor connected in series to the radiator and the inductance value of the inductor connected in parallel to the radiator can be similar. It should be noted that in different implementations, if there are multiple inductors connected in series / parallel to the antenna, the inductance value of each inductor can be in the corresponding range, and the inductance values of different inductors can be the same or different.

[0140] The magnetic current loop antenna provided by the embodiments of the present application can also include a magnetic current loop slot antenna. Please refer to Figure 11 for a schematic composition of the magnetic current loop slot antenna provided by the embodiments of the present application. In order to realize the radiation characteristics of the magnetic current loop antenna, one or more inductors L b can be connected to the ground through the originally directly coupled end (or both ends) of the radiation branch of the magnetic current loop slot antenna. Figure 11 is described by taking an example that one end of the antenna radiator needs to be grounded (such as a left-handed antenna).

[0141] It should be understood that for a general slot antenna, at least one end of its radiator needs to be grounded. For example, one end of the radiator of a left-handed antenna needs to be grounded, and both ends of the radiator of a slot antenna need to be grounded. Thus, in the area near the ground of the radiator, the electric field is significantly lower than in the area near the feed point due to the decrease in the potential on the radiator. That is, the electric field distribution between the radiator and the reference ground is not uniform.

[0142] In this example, an inductor can be connected in series on the radiator of the slot antenna. The inductor can divide the radiator of the slot antenna into two parts, one end of one part of the radiator can be coupled to the inductor and the feed point (in the direct feed scheme), and one end of the other part of the radiator can be coupled to the inductor and the other end can be grounded.

[0143] By setting the inductor (such as L b ), the inductor stores magnetic energy, so that when the current on the radiating branch reverses due to the change of the feed signal, the change of the current will be delayed compared to the change of the voltage, and thus the change of the current on the radiator between the inductor and the feed point will be more delayed than the change of the current on the radiator of the general slot antenna, thereby obtaining a relatively uniform electric field around the radiator between the inductor and the feed point. The radiation characteristics of the magnetic current loop antenna are obtained.

[0144] It should be noted that similar to the description of the magnetic current loop antenna in the above Figure 10 , in the description shown in the Figure 11 of this example, only the structural features (such as setting L b ) for achieving the radiation characteristics of the magnetic current loop antenna. The structure does not constitute a structural limitation of the magnetic current loop antenna itself. For example, in some embodiments, one end of the magnetic current loop slot antenna away from the ground end can also be coupled to the feed point to form a direct feed. In other embodiments, a feed branch can be provided between the radiating branch of the magnetic current loop slot antenna and the reference ground to form a coupled feed. In other embodiments, a PMC is provided at the boundary of the antenna (such as a magnetic boundary), and the radiating branch of the magnetic current loop antenna is provided on the other side of the PMC, thereby obtaining a magnetic current loop slot antenna in the form of a magnetic current loop slot antenna.

[0145] The magnetic current loop slot antenna provided in this example can also cover at least one of the LB, MB, and / or HB working frequency bands.

[0146] In the specific implementation process, the inductor L b connected in series on the radiator of the magnetic current loop slot antenna can be adjusted to adjust the working frequency band of the magnetic current loop slot antenna.

[0147] For example, when the magnetic current loop slot antenna works at a low frequency (LB), the inductor L bThe inductance value of the inductor L can be in the range of 5nH to 47nH. When the magnetic current loop slot antenna works in the MB, the inductance L b The inductance value of the inductor L can be in the range of 1nH to 33nH. When the magnetic current loop slot antenna works in the HB, the inductance L b The inductance value of the inductor L can be in the range of 0.5nH to 10nH.

[0148] It can be seen that, in combination with the foregoing description of the magnetic current loop wire antenna, in the present example, the inductance L b The inductance value of the inductor L can be in the range of 5nH to 47nH. When the magnetic current loop slot antenna works in the MB, the inductance L a The inductance value of the inductor L can be in the range of 0.5nH to 10nH.

[0149] In some embodiments of the present application, one or more inductors can also be connected in series on the radiator of the magnetic current loop slot antenna, so that the electric field during the operation of the antenna is more uniform, thereby improving the radiation efficiency of the antenna.

[0150] For example, when the magnetic current loop slot antenna works in the low frequency, the inductance connected in series on the radiator can have an inductance value in the range of 5nH to 47nH. When the magnetic current loop slot antenna works in the MB, the inductance connected in series on the radiator can have an inductance value in the range of 1nH to 33nH. When the magnetic current loop slot antenna works in the HB, the inductance connected in series on the radiator can have an inductance value in the range of 0.5nH to 10nH.

[0151] The magnetic current loop antenna (such as the magnetic current loop wire antenna described above, and such as the magnetic current loop slot antenna described above) provided by the embodiments of the present application can be excited by direct feeding or by coupling feeding.

[0152] As an example, direct feeding can be achieved by directly setting a feeding point on the radiating branch. The feeding point can be one end of a feeding module, and the other end of the feeding module can be coupled with a radio frequency microstrip line. When feeding signals, the radio frequency module can transmit radio frequency signals to the feeding module through the radio frequency microstrip line. The feeding module can transmit the radio frequency signals to the antenna radiator (such as the radiating branch of the magnetic current loop antenna) so that the radio frequency signals are converted into electromagnetic waves by the antenna radiator for transmission. The feeding module can be implemented in the form of a metal needle, a metal spring, etc. The embodiments of the present application do not limit the specific implementation of the feeding module. The feeding implementation in this example can be applied to any of the following examples of the magnetic current loop antenna with direct feeding.

[0153] It should be noted that, in order to obtain the working effect of uniform electric field, in some embodiments of the present application, the position of the inductor on the antenna radiator can be further limited, taking the magnetic current loop antenna with direct feeding as an example.

[0154] For example, for the directly fed magnetic current loop antenna, the inductor L a The distance from the feed point can be included between 1 / 8 wavelength and 1 wavelength of the operating wavelength. Correspondingly, for the directly fed magnetic current loop antenna, the inductor L b The distance from the feed point can also be included between 1 / 8 wavelength and 1 wavelength of the operating wavelength.

[0155] In addition, in other embodiments, for the magnetic current loop antenna in the coupled feed scenario, the inductor L also meets the distance range defined above. The part of the description will be described in detail in the subsequent examples in combination with specific structures.

[0156] Through the above examples of Figure 10 and Figure 11 , those skilled in the art should be able to have a comprehensive understanding of the composition features of the magnetic current loop antenna provided by the embodiments of the present application. The magnetic current loop antenna provided by the embodiments of the present application has different response characteristics for the dielectric loss and the magnetic loss of the implementation material thereof. According to the different response characteristics, the magnetic current loop antenna can be adjusted. For example, the radiation efficiency of the magnetic current loop antenna is optimized.

[0157] For example, the influence of the dielectric loss on the magnetic current loop antenna is explained in combination with Figure 12 and Figure 13 . Among them, Figure 12 is a comparison diagram of return loss (S11) of different dielectric losses, Figure 13 is a comparison diagram of radiation efficiency and system efficiency of different dielectric losses. Different dielectric losses can be identified by different dielectric loss tangent. In this example, the radiation difference of the antenna is compared under the condition that the antenna material adopts a dielectric loss tangent of 0.005 and a dielectric loss tangent of 0.028, and other conditions are the same. As shown in Figure 12 , the smaller the dielectric loss tangent, the lower the S11 bandwidth and depth. As shown in Figure 13 (a), the smaller the dielectric loss tangent, the higher the radiation efficiency. Similarly, as shown in Figure 13 (b), the smaller the dielectric loss tangent, the higher the system efficiency. It is thus shown that the increase of the dielectric loss will cause more energy to be lost, which is reflected on the S11 as the resonance being wider and deeper, and the corresponding efficiency being lower. Therefore, for the magnetic current loop antenna, using a material with a smaller dielectric loss can effectively reduce the loss and improve the antenna radiation performance.

[0158] The influence of the magnetic loss on the magnetic current loop antenna is explained in combination with Figure 14 and Figure 15 . Among them, Figure 14Fig. 4 shows a comparison of return loss (S11) of different magnetic medium loss, Figure 15 Fig. 5 shows a comparison of radiation efficiency and system efficiency of different magnetic medium loss. Different magnetic medium loss can be identified by different magnetic medium loss tangent. In this example, the radiation difference of the antenna is compared under the condition that other conditions are the same, and the magnetic medium loss tangent of the antenna material is 0.028, 0.05 and 0.08. As shown in Figure 14 Fig. 5a, the smaller the magnetic medium loss tangent, the lower the S11 bandwidth and depth. As shown in Figure 15 Fig. 5b, the smaller the magnetic medium loss tangent, the higher the radiation efficiency. Similarly, as shown in Figure 15 Fig. 5c, the smaller the magnetic medium loss tangent, the higher the system efficiency. It is shown that the increase of the magnetic medium loss will cause more energy loss, which is reflected on S11 as the resonance becomes wider and deeper, and the corresponding efficiency decreases.

[0159] In combination with the influence of dielectric loss on the magnetic current loop antenna given in Figure 12 Fig. 2, Figure 13 and the influence of magnetic medium loss on the magnetic current loop antenna given in Figure 14 Fig. 3, Figure 15 it can be seen that the increase of the magnetic medium loss will also affect the radiation of the magnetic current loop antenna, but the increase of the dielectric loss has a more obvious influence on the radiation of the magnetic current loop antenna. That is to say, for the magnetic current loop antenna which is an electric field type antenna, when selecting materials, materials with smaller dielectric loss can be preferred to realize the antenna structure.

[0160] In combination with the foregoing description, Figure 16 a logical division of the magnetic current loop antenna provided by the embodiments of the present application is given. For example, in the magnetic current loop wire antenna included in the magnetic current loop antenna, a magnetic current loop monopole antenna and a magnetic current loop dipole antenna can be included. In the magnetic current loop slot antenna included in the magnetic current loop antenna, a magnetic current loop slot antenna and a magnetic current loop left-handed antenna can be included.

[0161] The composition features and radiation of the above four existing magnetic current loop antennas will be described below in combination with the drawings. It should be noted that the four existing magnetic current loop antennas are only four specific implementations of the magnetic current loop antenna provided by the embodiments of the present application, and other embodiments with other compositions of the antenna composition form consistent with the radiation features of the magnetic current loop antenna shown in Figure 8A should also be within the protection scope of the embodiments of the present application.

[0162] In the following description, the operation of the magnetic current loop antenna in the fundamental mode is taken as an example. It should be understood that the magnetic current loop antenna operating in the corresponding multiple frequency of the fundamental mode (i.e., high-order mode) can be derived from the size limitation and inductance setting of the fundamental mode, and thus the magnetic current loop antenna corresponding to the high-order mode should also be within the protection scope of the scheme provided by the embodiments of the present application.

[0163] First, taking the direct feeding mode as an example, the composition and operation of various magnetic current loop antennas are described.

[0164] Please refer to Figure 17 , which is a composition schematic diagram of a magnetic current loop monopole antenna provided by the embodiments of the present application.

[0165] As shown in Figure 17 , the magnetic current loop monopole antenna shown in the example can include a radiation branch, which can be branch 1, referred to as B1, as shown in Figure 17 . One end of the B1 can be coupled to a feeding point. The other end of the B1 can be grounded through an inductor L M1 . In different embodiments, the inductor L M1 on the radiation branch can be flexibly arranged. For example, the value range of the inductor L M1 can refer to the range of the inductor L a which is a parallel inductor in the above description, and will not be described here. In addition, in some embodiments of the present application, in the fundamental mode working scenario of the example, the distance between the inductor L M1 and the feeding point can be greater than or equal to 1 / 8 of the working wavelength. In the working scenario of the high-order mode, the distance between the inductor L M1 and the feeding point can be greater, such as between 1 / 8 and 1 times the working wavelength.

[0166] In the embodiments of the present application, the length of the radiation branch of the magnetic current loop monopole antenna can be related to the working frequency band. For example, in the fundamental mode working scenario of the example, the length of the B1 can be less than 1 / 4 of the wavelength corresponding to the working frequency band (referred to as the working wavelength). Correspondingly, in the high-order mode working scenario, the length of the B1 can also be greater than 1 / 4 of the working wavelength, such as 2 times the frequency scenario, and the length of the B1 can be less than 1 / 2 of the working wavelength. For example, in the 3 times frequency scenario, the length of the B1 can be less than 3 / 4 of the working wavelength. And so on.

[0167] The wavelength corresponding to the working frequency band can be the wavelength of the center frequency point of the working frequency band. It should be noted that, in combination with the foregoing description, the length of B1 is less than 1 / 4 of the working wavelength in the case of the magnetic current loop antenna working in the eigenmode (i.e., 1 times frequency). If the magnetic current loop antenna works in a high-order mode (such as 2 times frequency, 3 times frequency, etc.), the length of B1 can also be correspondingly lengthened, such as to the size of the working wavelength. In this scenario, the inductance L M1 The distance from the feed point can be set to be slightly less than 1 times the working wavelength.

[0168] The magnetic current loop monopole antenna provided in the embodiments of the present application can be arranged in an electronic device to support the wireless communication function of the electronic device. For example, in combination with the strong electric field distribution diagram of the floor eigenmode shown in Figure 2 The magnetic current loop monopole antenna provided in the embodiments of the present application can be arranged in an electronic device to support the wireless communication function of the electronic device. For example, in combination with the strong electric field distribution diagram of the floor eigenmode shown in Figure 18 A magnetic current loop monopole antenna arranged in an electronic device is shown. In this example, the magnetic current loop monopole antenna works in the intermediate frequency. Therefore, by arranging the magnetic current loop monopole antenna at the top end of the electronic device, the intermediate frequency radiation on the floor can be excited well, thereby obtaining good radiation performance.

[0169] As a possible implementation of a magnetic current loop antenna, the magnetic current loop monopole antenna provided in the embodiments of the present application has a structure as shown in Figure 17 The magnetic current loop monopole antenna provided in the embodiments of the present application can be arranged in an electronic device to support the wireless communication function of the electronic device. For example, in combination with the strong electric field distribution diagram of the floor eigenmode shown in Figure 19 A magnetic current loop monopole antenna arranged in an electronic device is shown. In this example, the magnetic current loop monopole antenna works in the intermediate frequency. Therefore, by arranging the magnetic current loop monopole antenna at the top end of the electronic device, the intermediate frequency radiation on the floor can be excited well, thereby obtaining good radiation performance. Figure 19 (a) in FIG. 1 shows a schematic diagram of the actual simulation result. In order to make the description clearer, Figure 19 (b) in FIG. 1 shows a logical diagram of the electric field distribution. It can be seen that, when the magnetic current loop monopole antenna works, a uniformly distributed electric field can be generated between the radiation branch and the reference ground. Therefore, the magnetic current loop monopole antenna meets the radiation characteristics of the magnetic current loop antenna.

[0170] The magnetic current loop monopole antenna provided in the embodiments of the present application can generate a uniformly distributed electric field around the antenna radiator, and also has good radiation performance for covering at least one working frequency band.

[0171] For example, the radiation of the magnetic current loop monopole antenna is described below in combination with the simulation results of Figure 20 and Figure 21 .

[0172] AsFigure 20 The image shows a simulation diagram of the S-parameters of a magnetic flux loop monopole antenna provided in an embodiment of this application. Figure 20 As shown in (a) of the diagram, the magnetohydrodynamic loop monopole antenna in this example can generate a resonance at approximately 1.8 GHz. This resonance has a -2 dB bandwidth of at least 100 MHz on S11, with a maximum depth reaching -12 dB. Figure 20 As shown in (b) of this application, the magnetic flux loop monopole antenna provided in this embodiment exhibits good port matching characteristics on the Smith chart even without any matching circuit. This also allows the magnetic flux loop monopole antenna provided in this embodiment to save space occupied by the matching circuit during configuration.

[0173] like Figure 21 The diagram shows the efficiency of the magnetic flux loop monopole antenna provided in this embodiment. It can be seen that the radiation efficiency between 1.4 GHz and 2.5 GHz is above -2 dB, and the corresponding system efficiency peak is close to -1 dB, with a -2 dB bandwidth approaching 400 MHz. Therefore, the magnetic flux loop monopole antenna provided in this embodiment can cover at least one operating frequency band, thereby effectively supporting the wireless communication functions of electronic devices.

[0174] Based on the above description, those skilled in the art should have a precise understanding of the magnetic flux loop monopole antenna provided in the embodiments of this application. The following description, in conjunction with the current distribution of the magnetic flux loop monopole antenna during operation, further illustrates the solution provided in the embodiments of this application.

[0175] For example, in combination Figure 22 This is a current simulation illustration of a magnetohydrodynamic loop monopole antenna provided in an embodiment of this application. Figure 22 (a) in the diagram represents the actual simulation results. For ease of explanation, Figure 22 (b) shows the relationship with Figure 22 The logic distribution diagram of the current corresponding to (a) in the diagram is shown below. Figure 22 As shown, having as Figure 17 A magnetic flux loop monopole antenna, even in quarter-wavelength mode, will exhibit reverse current in its radiating stubs (or ground plane) during operation. For example, consider the current in the radiating stubs in this example. In inductor L... M1 A reverse current can be distributed on the radiating stub between the feed point and the radiating element. However, a typical monopole antenna (such as an ILA antenna) will not exhibit a reverse current on the radiator when operating in quarter-wavelength mode. It should be understood that, in conjunction with the aforementioned explanation of the magnetic flux loop antenna, in this example, an inductor L is placed at the end of the radiator furthest from the feed point. M1 Through the inductor L M1the energy storage characteristic of magnetic energy, the current changes later than the voltage, so that in the case that the current near the feed point has reversed (as shown by (b) in Figure 22 , to the right), the current near the inductor L M1 still maintains the previous direction (as shown by (b) in Figure 22 , to the left). This causes a reversed current to be generated on the radiator. The generation of the reversed current effectively adjusts the electric field distribution between the radiator and the reference ground, thereby obtaining a more uniform electric field distribution. Thus the radiation characteristic of the magnetic current loop antenna is obtained.

[0176] The above example is described with the inductor L M1 being configured at the end far away from the feed point. In other embodiments of the present application, the inductor L M1 may also be configured at other positions on the radiating branch. For example, in combination with Figure 23 , another magnetic current loop monopole antenna is shown. In this example, the inductor L M1 may be configured at the end near the non-feed point. Similar to the example of Figure 22 , a reversed current can be formed on the radiator between the inductor L M1 and the feed point. For the radiator between the inductor L M1 and the right end, in combination with the foregoing description of the magnetic current loop antenna, the inductor L M1 may lower the potential at the position of the radiator coupled with the inductor, thereby lowering the potential at the end of the magnetic current loop antenna. That is, the current at the end of the antenna can be returned to the ground through the inductor L M1 (as shown by the current to the left in Figure 23 ). Thus a more uniformly distributed electric field can be formed on the right side of the inductor L M1 .

[0177] In combination with the foregoing examples of Figure 22 and Figure 23 , it can be seen that in the magnetic current loop monopole antenna provided in this example, the configuration position of the inductor L M1 is very flexible, and different configuration positions of the inductor L M1 will not affect the uniform electric field distribution region of the magnetic current loop monopole antenna, i.e., at least the region between the radiating branch and the reference ground.

[0178] It should be noted that in other embodiments of the present application, at least one inductor can also be connected in series on the radiator of the magnetic current loop monopole antenna. For example, as shown in Figure 24 , an inductor L M2, so that the electric field distribution is more uniform, and the radiation efficiency of the magnetic current loop monopole antenna is improved. In different implementations of the present application, the setting of the inductance position in series on the radiator and the setting of the number of inductances can be flexibly selected according to actual needs, and the embodiments of the present application do not limit this. For example, the value range of the inductance L M2 in the above description is the same as the range of the inductance L b , which will not be repeated here.

[0179] In different specific implementations, the specific implementation of the magnetic current loop monopole antenna composed of any one of Figures 17-24 may be different. For example, in some embodiments, the radiation branches of the magnetic current loop monopole antenna can be all or partially reused with the metal frame of the electronic device. In other embodiments, the radiation branches of the magnetic current loop monopole antenna can also be implemented through a flexible printed circuit (FPC), a metal frame die casting for anodicoxidation (MDA) process, and the like. The embodiments of the present application do not limit the specific implementation form of the magnetic current loop monopole antenna.

[0180] The above is a description of the magnetic current loop antenna scheme provided by the embodiments of the present application in combination with the magnetic current loop monopole antenna. The following takes the magnetic current loop antenna as an example of the magnetic current loop dipole antenna to continue to describe the magnetic current loop antenna provided by the embodiments of the present application.

[0181] It should be understood that the existing monopole antenna realizes radiation through a 1 / 4 wavelength radiation structure. Correspondingly, the dipole antenna realizes radiation through a 1 / 2 wavelength radiation structure based on the mirror principle.

[0182] In this example, based on the existing dipole, it is improved to obtain the corresponding magnetic current loop dipole antenna.

[0183] In combination with Figure 25 , a composition schematic diagram of a magnetic current loop dipole antenna provided by the embodiments of the present application is shown. It should be understood that in combination with the foregoing description, the following limitations are all examples of the magnetic current loop dipole antenna working in the base mode scenario, and similar extensions can be made in the working scenario of the high-order mode. Here will not be repeated.

[0184] As shown in Figure 25 , the magnetic current loop dipole antenna shown in this example can include at least two radiation branches, such as Figure 25B2 and B3. The opposite ends of the B2 and B3 can be coupled with the feeding point respectively. For example, the positive pole of the feeding point can be coupled with the B2, and the negative pole of the feeding point can be coupled with the B3. The other ends of the B2 and B3 away from the feeding point can be grounded through inductances respectively. For example, the end of the B2 away from the feeding point can be grounded through an inductance L D1 , and the end of the B3 away from the feeding point can be grounded through an inductance L D2 .

[0185] It should be noted that the inductances L D1 and L D2 may have the same range as the inductance L a in the above description, which will not be repeated here. In different embodiments, the positions of the inductances arranged on the radiation branch can be flexible. In addition, in some embodiments of the present application, the distance between the inductance L D1 and the feeding point can be between 1 / 8 wavelength and 1 wavelength of the working wavelength. Similarly, in some other embodiments of the present application, the distance between the inductance L D2 and the feeding point can also be between 1 / 8 wavelength and 1 wavelength of the working wavelength.

[0186] In the embodiments of the present application, the size of the radiation branch of the magnetic current loop dipole antenna can be related to the working frequency band. For example, the length of the B2 or B3 can be less than 1 / 4 of the wavelength corresponding to the working frequency band. That is, the length of the radiation branch composed of the B2 and B3 in the embodiments of the present application can be less than 1 / 2 of the wavelength corresponding to the working frequency band. In some embodiments, the length of the radiation branch composed of the B2 and B3 can also be greater than 1 / 4 of the working frequency band. The wavelength corresponding to the working frequency band can be the wavelength of the center frequency point of the working frequency band.

[0187] The magnetic current loop dipole antenna provided in the embodiments of the present application can be arranged in an electronic device to support the wireless communication function of the electronic device. For example, in combination with Figure 2 the strong electric field distribution diagram of the floor eigenmode shown, the magnetic current loop dipole antenna provided in the present example, as an electric field type antenna, can be arranged in the strong electric field region of the floor corresponding to the working frequency band, so as to excite the floor to radiate better, thereby making the magnetic current loop dipole antenna obtain better radiation performance. As an example, Figure 26 a magnetic current loop dipole antenna arranged in an electronic device is shown. In this example, the magnetic current loop dipole antenna works in the intermediate frequency. Therefore, by arranging the magnetic current loop dipole antenna at the top end of the electronic device, the intermediate frequency radiation on the floor can be excited better, thereby obtaining better radiation performance.

[0188] As a possible implementation of a magnetic current loop antenna, the magnetic current loop dipole antenna provided in the present example has a structure as shown inFigure 27 The magnetic current loop-dipole antenna with the composition shown in the figure can generate a uniform electric field near the antenna radiator during operation. For example, Figure 27 The figure shows an electric field simulation diagram of the magnetic current loop-dipole antenna provided in the present example in a working scenario. Among them, Figure 27 (a) in the figure shows a schematic diagram of the actual simulation result. In order to make the description more clear, Figure 27 (b) in the figure shows a logical diagram of the electric field distribution. It can be seen that when the magnetic current loop-dipole antenna works, a uniformly distributed electric field can be generated between the radiation branch and the reference ground. Therefore, the magnetic current loop-dipole antenna meets the radiation characteristics of the magnetic current loop antenna.

[0189] The magnetic current loop-dipole antenna provided in the embodiments of the present application can generate a uniformly distributed electric field around the antenna radiator, and also has good radiation performance for covering at least one working frequency band.

[0190] For example, the following will be described in combination with Figure 28 and Figure 29 simulation results of the magnetic current loop-dipole antenna.

[0191] As Figure 28 shown, it is an S parameter simulation diagram of the magnetic current loop-dipole antenna provided in the embodiments of the present application. As Figure 28 (a) in the figure shows that the magnetic current loop-dipole antenna in the present example can produce a resonance at about 1.8GHz. The -2dB bandwidth of the resonance on S11 is at least 100MHz, and the deepest point reaches -7.5dB. As Figure 28 (b) in the figure shows that without any matching circuit, the magnetic current loop-dipole antenna provided in the embodiments of the present application has good port matching characteristics on the Smith chart. Therefore, the magnetic current loop-dipole antenna provided in the embodiments of the present application can save the space occupied by the matching circuit during configuration.

[0192] As Figure 29 shown, it is an efficiency diagram of the magnetic current loop-dipole antenna provided in the embodiments of the present application. It can be seen that the radiation efficiency between 1.4GHz and 2.5GHz is all above -2dB, and the corresponding system efficiency peak value also exceeds -1dB, and the -2dB bandwidth exceeds 400MHz. Therefore, the magnetic current loop-dipole antenna provided in the embodiments of the present application can cover at least one working frequency band, thereby achieving the effect of effectively supporting the wireless communication function of the electronic device.

[0193] With the above description, those skilled in the art should have an accurate understanding of the magnetic current loop-dipole antenna provided by the embodiments of the present application. The scheme provided by the embodiments of the present application will be further described below in combination with the current distribution of the magnetic current loop-dipole antenna in the working process.

[0194] It should be noted that, in the examples of the above description, Figures 25-29 The size and position of B2 and B3 can be symmetrically arranged left and right. For example, the size and position of inductance L D1 and inductance L D2 may also be symmetrically arranged left and right. In this way, a uniform electric field distribution can be obtained between B2 and B3 and the reference ground. In other embodiments of the present application, the positions of B2 and B3 and the corresponding inductance can also be asymmetric. For example, in combination with the example of Figure 30 , as shown in (a) of Figure 30 , the position of B2 and the arrangement of inductance can be similar to the above Figure 25 . That is, one end of B2 can be coupled with the feed point, and the other end of B2 can be grounded through inductance L D1 . Correspondingly, the arrangement of B3 can be different from the symmetric arrangement left and right as shown in Figure 25 . For example, in this example, B3 can be symmetrically arranged with B2, and the end of B3 can not be grounded through inductance. In this way, the radiation of the magnetic current loop monopole antenna in the previous example can be obtained between B2 and the reference ground. B3 can form the radiation of the existing monopole antenna. In other embodiments, as shown in (b) of Figure 30 , the radiation of the magnetic current loop monopole antenna can also be obtained by grounding the end of B3 away from the feed point through inductance. When the end of B2 away from the feed point is floating, the radiation of the existing monopole antenna can be formed. Of course, in other embodiments of the present application, the bodies of B2 and B3 can also be asymmetrically arranged. For example, the length of B2 can be different from that of B3.

[0195] In addition, similar to the above description of the magnetic current loop monopole antenna, in the magnetic current loop-dipole antenna provided in this example, the arrangement position of inductance can also be flexible. Different arrangement positions of inductance L S1 will not affect the uniform electric field distribution area of the magnetic current loop-dipole antenna.

[0196] It should be noted that, in other embodiments of the present application, at least one inductance can also be connected in series on the radiator of the magnetic current loop-dipole antenna. For example, as shown in Figure 31 , inductance L D3 may be connected in series on B2, and inductance L D4, so that the electric field distribution is more uniform, and the radiation efficiency of the magnetic current loop dipole antenna is improved. In different implementations of the present application, the position of the inductor in series on the radiator and the number of inductors can be flexibly selected according to actual needs, and the embodiments of the present application do not limit this. For example, the inductor L D3 The value range of the inductor L D4 The value range of the inductor L b The range is not repeated here.

[0197] In different specific implementations, the specific implementation of the magnetic current loop dipole antenna composed of any one of Figures 25-31 For example, in some embodiments, the radiation branch of the magnetic current loop dipole antenna can be all or partially reused with the metal frame of the electronic device. In other embodiments, the radiation branch of the magnetic current loop dipole antenna can also be realized through a flexible printed circuit (FPC), a metal frame die-casting for anodization (MDA) process, etc. The embodiments of the present application do not limit the specific implementation form of the magnetic current loop dipole antenna.

[0198] It should be understood that the compositions of the magnetic current loop monopole antenna and the magnetic current loop dipole antenna shown in Figures 17-31 respectively, are only two possible examples of the magnetic current loop antenna provided by the embodiments of the present application. In other implementations provided by the embodiments of the present application, the radiation characteristics of the magnetic current loop antenna can also be obtained based on other existing electric field type antennas through similar processing (such as setting a grounded inductor on the radiator). The specific implementation is similar and will not be repeated here.

[0199] The specific implementation of the magnetic current loop slot antenna provided by the embodiments of the present application will be illustrated by examples below. Taking the magnetic current loop slot antenna and the magnetic current loop left-handed antenna as examples.

[0200] For example, in combination with Figure 32 , a composition schematic diagram of a magnetic current loop left-handed antenna provided by the embodiments of the present application is shown.

[0201] As shown in Figure 32 , the magnetic current loop left-handed antenna shown in this example can include at least one radiation branch, such as B4 shown in Figure 32 . One end of the B4 can be grounded. The other end of the B4 can be coupled with a feed point. In this example, an inductor L C1 may be connected in series on the radiator close to the grounded end. It can be understood that the inductor L C1At this time, B4 can be directly coupled to the reference ground. At the feed point location, it has, for example... Figure 32 The left-handed feed configuration shown can be used to construct an existing left-handed antenna. In this example, the left-handed feed configuration may include a feed point and a capacitor C1 connected in series with the feed point (C1 may be referred to as the left-handed capacitor). The left-handed capacitor can be used to excite the corresponding left-handed mode to radiate on B4. For example, by setting this left-handed capacitor, a non-reverse current can be formed on the radiating stub 4, and the resonance corresponding to this current can achieve coverage of the operating frequency band (such as low frequency) in a small space.

[0202] It should be noted that, in cases such as Figure 32 In the example shown, an inductor L is set on B4. C1 This makes the inductor L C1 The radiator of B4 between the feed point and the reference ground can form a uniform electric field distribution. In different embodiments, the inductor L C1 The position can be flexible. For example, the inductor L... C1 The value range of L can be referenced in the above description, which is also a series inductor. b The range is not elaborated here. Furthermore, in some embodiments of this application, the inductor L... C1 The distance from the feed point can be between 1 / 8 of the operating wavelength and 1 wavelength.

[0203] The magnetic flux loop left-handed antenna provided in this application embodiment can be installed in an electronic device to support the wireless communication function of the electronic device. For example, combined with Figure 2 The diagram illustrates the strong electric field distribution of the eigenmodes of the ground plane. The magnetic flux loop left-handed antenna provided in this example, as an electric field-type antenna, can be placed in the strong electric field region of the ground plane corresponding to the operating frequency band, thereby exciting the ground plane to radiate better, thus enabling the magnetic flux loop left-handed antenna to obtain better radiation performance. As an example, Figure 33 This illustration shows the configuration of a magnetic flux loop left-handed antenna in an electronic device. The example focuses on the magnetic flux loop left-handed antenna operating at an intermediate frequency (IF). Therefore, by placing the magnetic flux loop left-handed antenna at the top of the electronic device, it is possible to better excite IF radiation from the floor, thereby achieving better radiation performance.

[0204] It should be understood that, in this example, an inductor L is placed near the grounding location of the left-handed antenna of the magnetic flux loop. C1 Return to ground. Based on the aforementioned analysis of the operating characteristics of the magnetic flux ring slot antenna, this structure enables the inductor L to... C1 A relatively uniform electric field distribution is formed between the feed point and the reference ground, i.e., between B4 and the reference ground, thereby obtaining the radiation characteristics of the magnetic flux ring slot antenna in this part.

[0205] As a possible realization of a magnetic flux loop antenna, Figure 34 This diagram illustrates an electric field simulation of one operating scenario for the left-handed magnetohydrodynamic loop antenna provided in this example. Figure 34 (a) in the diagram illustrates the actual simulation results. For a clearer explanation, Figure 34 (b) shows a logical schematic of the electric field distribution. It can be seen that when this left-handed magnetic flux loop antenna is operating, a uniformly distributed electric field can be generated between the radiating stub and the reference ground. Therefore, this left-handed magnetic flux loop antenna conforms to the radiation characteristics of a magnetic flux loop antenna.

[0206] The magnetic flux loop left-handed antenna provided in this application embodiment can generate a uniformly distributed electric field around the antenna radiator, and also has good radiation performance to cover at least one operating frequency band.

[0207] For example, the following combination Figure 35 as well as Figure 36 The simulation results illustrate the radiation behavior of the left-handed antenna of the magnetic flux loop.

[0208] like Figure 35 The image shows a simulation diagram of the S-parameters of the left-handed magnetohydrodynamic loop antenna provided in an embodiment of this application. Figure 35 As shown in (a) of the diagram, the magnetic flux loop left-handed antenna in this example can generate a resonance at approximately 1.8 GHz. This resonance has a -2 dB bandwidth of at least 100 MHz on S11, with a maximum depth reaching -8 dB. Figure 35 As shown in (b), the magnetic flux loop left-handed antenna provided in this embodiment of the application has good port matching characteristics on the Smith chart even without any matching circuit. This also allows the magnetic flux loop left-handed antenna provided in this embodiment of the application to save space occupied by the matching circuit during configuration.

[0209] like Figure 36 The diagram shows the efficiency of the magnetic flux loop left-handed antenna provided in this embodiment. It can be seen that the radiation efficiency between 1.4 GHz and 2.5 GHz is above -2 dB, and the corresponding system efficiency peak is close to -1 dB, with a -2 dB bandwidth exceeding 400 MHz. Therefore, the magnetic flux loop left-handed antenna provided in this embodiment can cover at least one operating frequency band, thereby effectively supporting the wireless communication function of electronic devices.

[0210] It should be noted that in some other embodiments of this application, at least one inductor can also be connected in series with the radiator of the magnetic flux loop left-handed antenna. For example, refer to... Figure 37 As shown, an inductor L can be connected in series with B4. C2, so that the electric field distribution is more uniform, and the radiation efficiency of the magneto fluid dynamic loop left-handed antenna is improved. In different implementations of the present application, the position of the inductor in series on the radiator and the number of inductors can be flexibly selected according to actual needs, and the embodiments of the present application do not limit this. For example, the value range of the inductor L C2 may refer to the range of the inductor L b in series described above, and will not be repeated here.

[0211] In different specific implementations, the specific implementation of the magneto fluid dynamic loop left-handed antenna composed of any one of Figures 32-37 may be different. For example, in some embodiments, the radiation branches of the magneto fluid dynamic loop left-handed antenna can be all or partially reused with the metal frame of the electronic device. In other embodiments, the radiation branches of the magneto fluid dynamic loop left-handed antenna can also be implemented in the form of a flexible printed circuit (FPC), a metal frame die casting for anodicoxidation (MDA) process, etc. The embodiments of the present application do not limit the specific implementation form of the magneto fluid dynamic loop left-handed antenna.

[0212] Please refer to Figure 38 , which is a composition schematic diagram of a magneto fluid dynamic loop slot antenna provided by the embodiments of the present application.

[0213] It should be understood that, based on the mirror principle, in combination with the magneto fluid dynamic loop left-handed antenna shown in Figure 32 , the structure composition of the magneto fluid dynamic loop slot antenna provided in this example can be obtained in the case of mirror setting of the PMC provided on the left side of the magneto fluid dynamic loop left-handed antenna. Among them, the feed point of the magneto fluid dynamic loop slot antenna can be arranged at the middle position of the PMC. The composition of a magneto fluid dynamic loop slot antenna and its working condition are described below in combination with the example of Figure 38 .

[0214] As shown in Figure 38 , the magneto fluid dynamic loop slot antenna shown in this example can include at least two radiation branches, such as B5 and B6 shown in Figure 2 . The opposite ends of the B5 and B6 can be respectively coupled to the feed point. For example, the positive electrode of the feed point can be coupled to the B5, and the negative electrode of the feed point can be coupled to the B6.

[0215] The ends of the B5 and B6 away from the feed point can be coupled to the ground. In this example, inductors can be connected in series on the B5 and B6. For example, an inductor L S1 may be connected in series on the B5, and an inductor L S2 may be connected in series on the B6.

[0216] It can be understood that, without the series inductance, B5 and B6 and the reference ground can form a gap, so as to form the existing gap antenna radiation under the excitation of the feed point. In this example, by arranging the inductance on B5 and B6 respectively, a uniform electric field can be formed between the radiators of B5 and B6 and the reference ground between the two inductances, so as to obtain the radiation characteristics of the magnetic current loop slot antenna.

[0217] It can be understood that, based on the foregoing mirror principle, a uniform electric field distribution can be obtained between the feed point and the inductance L S1 due to the energy storage characteristics of the inductance L S1 for magnetic energy. S2 Correspondingly, a uniform electric field distribution can also be obtained between the feed point and the inductance L S2 due to the energy storage characteristics of the inductance L S1 for magnetic energy. Therefore, the superposition of the above two scenarios can obtain a uniform electric field distribution between the inductance L S2 and the inductance L S2 between the radiators of B5 and B6 and the reference ground.

[0218] It should be noted that the value range of the inductance L S1 and the inductance L S2 may refer to the range of the inductance L b which is also a series inductance in the foregoing description, which will not be described here. In different embodiments, the positions of the inductance L S1 and / or the inductance L S2 may be flexible. In addition, in some embodiments of the present application, the distance between the inductance L S1 and the feed point can be between 1 / 8 wavelength and 1 wavelength of the working wavelength. Similarly, in some other embodiments of the present application, the distance between the inductance L S2 and the feed point can also be between 1 / 8 wavelength and 1 wavelength of the working wavelength.

[0219] The magnetic current loop slot antenna provided in the embodiments of the present application can be arranged in an electronic device to support the wireless communication function of the electronic device. For example, in combination with the strong electric field distribution diagram of the floor eigenmode shown in Figure 39 , the magnetic current loop slot antenna provided in this example can be arranged in the strong electric field region of the floor corresponding to the working frequency band, so as to excite the floor to radiate better, thereby making the magnetic current loop slot antenna obtain better radiation performance. As an example, Figure 40 shows the arrangement of a magnetic current loop slot antenna in an electronic device. In this example, the magnetic current loop slot antenna works in the intermediate frequency. Therefore, by arranging the magnetic current loop slot antenna at the top end of the electronic device, the intermediate frequency radiation on the floor can be excited better, thereby obtaining better radiation performance.

[0220] It should be understood that in the present example, inductance is provided near the ground (such as the B5 ground end and the B6 ground end) of the magnetic current loop slot antenna. In combination with the analysis of the working characteristics of the aforementioned magnetic current loop slot antenna, the structure can make the inductance and the feed point form a relatively uniform electric field distribution. In combination with the electric field distribution on both sides of the PMC, the radiation characteristics of the magnetic current loop slot antenna between B5 and B6 and the reference ground can be obtained.

[0221] As a possible implementation of a magnetic current loop antenna, Figure 40 An electric field simulation diagram of the magnetic current loop slot antenna in a working scenario provided by the present example is shown. In the diagram, Figure 40 (a) in the diagram shows a schematic of the actual simulation results. In order to make the description clearer, Figure 41 (b) in the diagram shows a logical diagram of the electric field distribution. It can be seen that when the magnetic current loop slot antenna is working, a uniformly distributed electric field can be generated between the radiation branch and the reference ground. Therefore, the magnetic current loop slot antenna meets the radiation characteristics of the magnetic current loop antenna.

[0222] The magnetic current loop slot antenna provided by the embodiments of the present application can generate a uniformly distributed electric field around the antenna radiator, and also has good radiation performance for covering at least one working frequency band.

[0223] For example, the radiation of the magnetic current loop slot antenna is described below in combination with the simulation results of Figure 42 and Figure 41 .

[0224] As shown in Figure 41 , an S parameter simulation diagram of the magnetic current loop slot antenna provided by the embodiments of the present application is shown. As shown in Figure 41 (a), the magnetic current loop slot antenna in the present example can produce a resonance at about 1.8 GHz. The -2 dB bandwidth of the resonance on S11 is close to 100 MHz, and the deepest point is close to -11 dB. As shown in Figure 42 (b), the magnetic current loop slot antenna provided by the embodiments of the present application has good port matching characteristics on the Smith chart without any matching circuit. Therefore, the magnetic current loop slot antenna provided by the embodiments of the present application can save the space occupied by the matching circuit during configuration.

[0225] As shown in Figures 38-42As shown in the figure, the efficiency of the magnetic current loop slot antenna provided in the embodiment of the present application is shown. It can be seen that the radiation efficiency is above -2dB between 1.4GHz and 2.5GHz, the corresponding system efficiency peak is close to -1dB, and the -2dB bandwidth is more than 400MHz. Therefore, the magnetic current loop slot antenna provided in the embodiment of the present application can cover at least one working frequency band, thereby achieving the effect of effectively supporting the wireless communication function of the electronic device.

[0226] It should be noted that the above Figure 43 The examples are all described by taking the magnetic current loop slot antenna as an example of left-right symmetric configuration. For example, the size and position of B5 and B6 can be left-right symmetrically arranged. For another example, the inductance L S1 and the inductance L S2 The position of the inductance can also be left-right symmetrically arranged. Thus, uniform electric field distribution can be obtained between B5 and B6 and the reference ground. In other embodiments of the present application, the positions of B5 and B6 and the corresponding inductance can also be asymmetric. For example, in combination with the example of Figure 43 , as shown in (a) of Figure 38 , the positions of B5 and B6 and the arrangement of the inductance can be similar to the above Figure 38 . However, the arrangement of the inductance can be different from the example shown in Figure 43 .

[0227] For example, in the example of (a) in Figure 43 , the inductance L S1 may be connected in series on B5, so that uniform electric field distribution is obtained between the inductance L S1 and the feed point, and between B5 and the reference ground. Correspondingly, no inductance can be connected in series on B6. Thus, the electric field distribution of the existing slot antenna is obtained between B6 and the reference ground. For another example, in the example of (b) in Figure 44 , the inductance L S2 may be connected in series on B6, so that uniform electric field distribution is obtained between the inductance L S2 and the feed point, and between B6 and the reference ground. Correspondingly, no inductance can be connected in series on B5. Thus, the electric field distribution of the existing slot antenna is obtained between B5 and the reference ground. Of course, in other embodiments of the present application, the B5 and B6 bodies can also be asymmetrically arranged. For example, the length and / or position of B5 can be different from that of B6.

[0228] It should be noted that in other embodiments of the present application, at least one inductance can also be connected in series on the radiator of the magnetic current loop slot antenna. For example, as shown in Figures 38-44 , the inductance L S3, so that the electric field distribution is more uniform, and the radiation efficiency of the magnetic current loop slot antenna is improved. Of course, in other embodiments, more inductors can be connected in series on B6, such as inductor L S4 , which further improves the radiation efficiency. In different implementations of the present application, the position of the inductor connected in series on the radiator and the number of inductors can be flexibly selected according to actual needs, and the embodiments of the present application do not limit this. For example, the inductor L S3 , the value range of the inductor L S4 can refer to the range of L b in the above description, which will not be repeated here.

[0229] In different specific implementations, the specific implementation of the magnetic current loop slot antenna composed of any one of Figures 32-44 may be different. For example, in some embodiments, the radiation branches of the magnetic current loop slot antenna can be all or partially reused with the metal frame of the electronic device. In other embodiments, the radiation branches of the magnetic current loop slot antenna can also be realized through flexible printed circuit (FPC), metal frame die casting for anodicoxidation (MDA), etc. The embodiments of the present application do not limit the specific implementation form of the magnetic current loop slot antenna.

[0230] It should be understood that the above Figure 10 respectively show the composition of the magnetic current loop left-handed antenna and the magnetic current loop slot antenna, which are only two possible examples of the magnetic current loop slot antenna provided by the embodiments of the present application. In other implementations provided by the embodiments of the present application, the radiation characteristics of the magnetic current loop antenna can also be obtained based on other existing electric field type slot antennas through similar processing (such as connecting inductors in series on the radiator). The specific implementation is similar, which will not be repeated here.

[0231] It should be noted that the magnetic current loop antennas provided in the above examples are all described in the form of direct feeding.

[0232] In other embodiments of the present application, the above magnetic current loop antennas, such as the magnetic current loop wire antenna shown in Figure 11 , and / or the magnetic current loop slot antenna shown in Figure 45 , and various subsequent specific examples, can also be excited through coupled feeding.

[0233] It is understandable that direct-feed excitation requires setting the feed point in a relatively fixed position, and also requires reserving structural space for feed components near the feed point. In contrast, the coupled feeding method provided in this embodiment feeds the radiating stubs via electromagnetic coupling, thus eliminating the need for feed components. Furthermore, the more flexible arrangement of the feed stubs makes it more advantageous for implementing the magnetic flux loop antenna provided in this embodiment.

[0234] The following description, in conjunction with the accompanying drawings, illustrates an embodiment of a coupled-fed magnetic flux loop antenna provided in this application. It should be noted that in the following examples, the radiator of the magnetic flux loop antenna is similar to that in the foregoing examples, the only difference being that the feed point can be replaced by an inductor in the foregoing examples. In the following examples, the mechanism of coupled feeding will be explained in detail, using examples of the four antenna schemes mentioned above, such as a magnetic flux loop monopole antenna, a magnetic flux loop dipole antenna, a magnetic flux loop left-handed antenna, and a magnetic flux loop slot antenna.

[0235] For example, Figure 45 The present application illustrates six possible configurations of a feed stub for feeding in a coupled-fed magnetic flux loop antenna system provided in an embodiment of the present application.

[0236] exist Figure 45 In the example of (a) above, the feed stub may include a radiator, such as Figure 45 The CB1 shown in (a) is an example. Both ends of the CB1 are suspended, and a feed point can be provided on the CB1. For example, one end of the feed point (e.g., positive terminal) can be coupled to the CB1, and the other end (e.g., negative terminal) can be coupled to a radio frequency signal line placed on a reference ground. It should be noted that the coupling position between the feed point and the CB1 can be different in different implementations. For example, in... Figure 45 In the example shown in (a), the feed point can be coupled to CB1 at the center of CB1. In other implementations of this example, the feed point can be coupled to CB1 at other locations on CB1, such as the left or right side of CB1.

[0237] Please refer to Figure 45 (b) in the diagram illustrates the composition of another type of feed stub for coupling feed provided in an embodiment of this application. In such... Figure 45In the example of (b) in FIG. 6, the feeding branch can include a radiator CB2. A feeding point can be disposed in series on the CB2. The feeding point can divide the CB2 into a left part and a right part. As one possible implementation, one end (e.g., positive) of the feeding point can be coupled to the left part, and the other end (e.g., negative) of the feeding point can be coupled to the right part. In this example, the two ends of the CB2 can be grounded through inductors, respectively. For example, one end of the CB2 can be grounded through an inductor LI, and the other end of the CB2 can be grounded through an inductor L2. Figure 45 In the example of (b) in FIG. 6, the feeding branch can include a radiator CB2. A feeding point can be disposed in series on the CB2. The feeding point can divide the CB2 into a left part and a right part. As one possible implementation, one end (e.g., positive) of the feeding point can be coupled to the left part, and the other end (e.g., negative) of the feeding point can be coupled to the right part. In this example, the two ends of the CB2 can be grounded through inductors, respectively. For example, one end of the CB2 can be grounded through an inductor LI, and the other end of the CB2 can be grounded through an inductor L2. Figure 45 It is noted that the position of the feeding point as shown in (b) in FIG. 6 is merely an example. Similar to the example of (a) in FIG. 6, the position of the feeding point can also be other positions on the CB2. Figure 45 It is noted that the position of the feeding point as shown in (b) in FIG. 6 is merely an example. Similar to the example of (a) in FIG. 6, the position of the feeding point can also be other positions on the CB2.

[0238] Please refer to (c) in FIG. 7, which is another constituent diagram of a feeding branch for performing coupled feeding provided by an embodiment of the present application. As shown in (c) in FIG. 7, the feeding branch in this example can include a radiator CB3. One end of the CB3 can be coupled to a feeding point. The other end of the CB3 can be disposed in the air. Figure 45 Figure 45 Please refer to (d) in FIG. 8, which is another constituent diagram of a feeding branch for performing coupled feeding provided by an embodiment of the present application. The constituent of the feeding branch in this example can be obtained by improving the constituent as shown in (c) in FIG. 7. As an example, as shown in (d) in FIG. 8, the feeding branch provided by this example can also include a radiator CB3. One end of the CB3 can be coupled to a feeding point.

[0239] Please refer to (d) in FIG. 8, which is another constituent diagram of a feeding branch for performing coupled feeding provided by an embodiment of the present application. The constituent of the feeding branch in this example can be obtained by improving the constituent as shown in (c) in FIG. 7. As an example, as shown in (d) in FIG. 8, the feeding branch provided by this example can also include a radiator CB3. One end of the CB3 can be coupled to a feeding point. Figure 45 Figure 45 Please refer to (d) in FIG. 8, which is another constituent diagram of a feeding branch for performing coupled feeding provided by an embodiment of the present application. The constituent of the feeding branch in this example can be obtained by improving the constituent as shown in (c) in FIG. 7. As an example, as shown in (d) in FIG. 8, the feeding branch provided by this example can also include a radiator CB3. One end of the CB3 can be coupled to a feeding point. Figure 45 Figure 45 Please refer to (d) in FIG. 8, which is another constituent diagram of a feeding branch for performing coupled feeding provided by an embodiment of the present application. The constituent of the feeding branch in this example can be obtained by improving the constituent as shown in (c) in FIG. 7. As an example, as shown in (d) in FIG. 8, the feeding branch provided by this example can also include a radiator CB3. One end of the CB3 can be coupled to a feeding point.

[0240] Please refer to (e) in FIG. 9, which is another constituent diagram of a feeding branch for performing coupled feeding provided by an embodiment of the present application. The constituent of the feeding branch in this example can be obtained by improving the constituent as shown in (c) in FIG. 7. As an example, as shown in (e) in FIG. 9, the feeding branch provided by this example can also include a radiator CB3. One end of the CB3 can be coupled to a feeding point. Figure 45 Figure 45 Please refer to (e) in FIG. 9, which is another constituent diagram of a feeding branch for performing coupled feeding provided by an embodiment of the present application. The constituent of the feeding branch in this example can be obtained by improving the constituent as shown in (c) in FIG. 7. As an example, as shown in (e) in FIG. 9, the feeding branch provided by this example can also include a radiator CB3. One end of the CB3 can be coupled to a feeding point. Figure 45 Figure 45 ​​​​​In the example shown in (c), the other end of the CB3 can be directly coupled to a reference ground. Furthermore, a through-slot can be provided on the CB3. This slot divides the CB3 into two unconnected parts. The location of this slot on the CB3 can be flexibly configured in different implementations.

[0241] Please refer to Figure 45 (f) in this example illustrates the composition of another feed stub for coupling feed provided in this embodiment. The feed stub in this example can be composed of, for example... Figure 45 The composition improvement shown in (e) is obtained. For example, as... Figure 45 As shown in (e), the feed stub provided in this example may also include a radiator CB3. One end of the CB3 may be coupled to the feed point. The other end of the CB3 may be directly coupled to the reference ground. Distinguished from Figure 45 In the example shown in (e), an inductor in series can be provided on the CB3. For example, in this example, an inductor L4 in series can be provided on the CB3, which divides the CB3 into two separate parts. These two separate parts are coupled through the inductor L4.

[0242] In different implementations of this application, it has the following characteristics: Figure 45 Any of the feed stub configurations shown can be placed between the radiating stub of the magnetic flux loop antenna and the reference ground to excite the radiating stub of the magnetic flux loop antenna, so that a uniform electric field distribution can be obtained in the region enclosed by the radiating stub, the reference ground, and the feed stub, thereby obtaining the radiation characteristics of the magnetic flux loop antenna.

[0243] It should be noted that the above Figure 45 The six examples shown are not exhaustive. The feed stub for coupled feeding of a magnetic flux loop antenna provided in this application can, during operation, obtain a uniform electric field distribution between the feed stub and the radiating stub, which is in the same direction as the radiating stub itself during operation. That is, during coupled feeding, the electric field generated by the feed stub itself can be uniformly distributed in the region between the feed stub and the radiating stub. Furthermore, the direction of the electric field generated by the feed stub itself can be the same as the direction of the electric field generated by the radiating stub. In some other implementations, the electric field distribution characteristics differ from those described above. Figure 45 The feed stub configuration shown can also achieve excitation of the feed stub through coupling feed, enabling the feed stub to acquire the radiation characteristics of a magnetic flux loop antenna during operation. Therefore, other components of the feed stub with the above-mentioned electric field distribution characteristics should also be included within the protection scope of the embodiments of this application.

[0244] In the coupled feeding mechanism provided in this example, since the feed stub is located in the region between the radiating stub and the reference ground, this region can have a uniform electric field distribution during the radiation process of the magnetic flux loop antenna. Therefore, the specific location of the feed stub in this region can be flexibly set without significantly affecting the operation of the magnetic flux loop antenna. Furthermore, similar to the aforementioned direct-feed magnetic flux loop antenna, the coupled feeding-based magnetic flux loop antenna in this example does not require additional matching circuitry for port matching. In different scenarios, port matching can be achieved by adjusting the length of the feed stub and / or the size of the inductor set on the feed stub.

[0245] The following section will provide a detailed explanation of the coupling power supply mechanism provided in this example, using the four specific implementations from the preceding examples. For ease of explanation, the following examples will employ, for instance, the coupling power supply mechanism provided in this example. Figure 46 The example shown in (a) is a coupled feed of the feed stubs.

[0246] For example, please refer to Figure 17 This is a schematic diagram of the composition of a coupled-fed magnetic flux loop monopole antenna provided in an embodiment of this application.

[0247] In conjunction with the explanation in the aforementioned direct feed scheme (such as... Figure 17 (As explained below), the magnetic flux loop monopole antenna shown in this example may include a radiating stub B1. One end of B1 may be grounded via an inductor. For example, in this example, one end of B1 may be grounded via an inductor L. CM1 Grounding. Unlike... Figure 17 As shown in the example, in the composition, in such a case... Figure 45 One end of B1, which is coupled to the feed point, can also be grounded through an inductor. For example, the other end of B1 can be grounded through an inductor L. CM2 Grounded. For example, the inductor L CM1 Inductor L CM2 The range of values ​​can be referenced in the above description of L, which is also a parallel inductor. a The range.

[0248] It should be noted that, based on the explanation of the distance between the inductor and the feed point in the aforementioned direct-feed scheme, in some implementations of this example, the inductor L can also be controlled. CM1 With inductor L CM2 The distance between them can be between 1 / 8 of the working wavelength and 1 times the wavelength, thereby obtaining magnetohydrodynamic radiation with uniform electric field characteristics.

[0249] In this embodiment, the length of the radiating stub B1 of the magnetic flux loop monopole antenna can be related to the operating frequency band. For example, the length of B1 can be less than 1 / 4 of the wavelength corresponding to the operating frequency band. The wavelength corresponding to the operating frequency band can be the wavelength of the center frequency point of the operating frequency band.

[0250] In this example, a feeding branch can also be provided between B1 and the reference ground. For example, the feeding branch can have a composition as shown in (a) of Figure 17 For example, the feeding branch can include a radiator CB1, and a feeding point provided at the center of CB1. The feeding branch can be used to excite the radiator B1 to radiate with the magnetic current loop antenna radiation characteristics through electromagnetic coupling during operation.

[0251] In some embodiments, the coupling-fed magnetic current loop monopole antenna is provided in an electronic device, and the configuration position and method example are similar to the direct-fed scheme as shown in Figure 46 , which will not be described here again.

[0252] As a possible implementation of a magnetic current loop antenna, the magnetic current loop monopole antenna provided in this example has a composition as shown in Figure 47 , which can generate a uniform electric field near the antenna radiator during operation. For example, Figure 47 shows an electric field simulation diagram of the magnetic current loop monopole antenna provided in this example in a working scenario. Among them, Figure 47 (a) shows a simulation result. In order to make the description clearer, Figure 48 (b) shows a logical diagram of the electric field distribution. It can be seen that during the operation of the magnetic current loop monopole antenna, a uniformly distributed electric field can be generated in the area surrounded by B1, the reference ground, and CB1. Therefore, the magnetic current loop monopole antenna meets the radiation characteristics of the magnetic current loop antenna.

[0253] The coupling-fed magnetic current loop monopole antenna provided in the embodiments of this application can generate a uniformly distributed electric field around the antenna radiator, and also has good radiation performance for covering at least one working frequency band.

[0254] For example, the radiation of the coupling-fed magnetic current loop monopole antenna is described below in combination with the simulation results of Figure 49 and Figure 48 .

[0255] As shown in Figure 48 , it is an S parameter simulation diagram of the coupling-fed magnetic current loop monopole antenna provided in the embodiments of this application. As shown in Figure 48 (a) of, the magnetic current loop monopole antenna in this example can produce a resonance at about 1.85 GHz. The -2 dB bandwidth of the resonance on S11 is close to 200 MHz, and the deepest point is more than -8 dB. As shown in Figure 49As shown in (b), the coupled-fed magnetic flux loop monopole antenna provided in this embodiment exhibits good port matching characteristics on the Smith chart even without any matching circuit. This also allows the coupled-fed magnetic flux loop monopole antenna provided in this embodiment to save space occupied by the matching circuit during configuration.

[0256] like Figure 50 The diagram shows the efficiency of the coupled-fed magnetic flux loop monopole antenna provided in this embodiment. It can be seen that the radiation efficiency between 1.4 GHz and 2.5 GHz is above -1 dB, approaching 0 dB, and the corresponding system efficiency peak also exceeds -1 dB, with a -2 dB bandwidth exceeding 200 MHz. Therefore, the coupled-fed magnetic flux loop monopole antenna provided in this embodiment can cover at least one operating frequency band, thereby effectively supporting the wireless communication functions of electronic devices.

[0257] Building upon the above explanation, this example also provides a current simulation diagram of the coupled-fed magnetic flux loop monopole antenna. For example, combined with... Figure 50 , Figure 50 (a) in the diagram represents the actual simulation results. For ease of explanation, Figure 22 (b) shows the relationship with Figure 22 The logic distribution diagram of the current corresponding to (a) in the diagram is shown. Combined with... Figure 51 As an example and illustration, in this example, through the excitation of the coupled feed, a reverse current can be formed in both the radiating stub B1 and the reference ground. It can be understood that this reverse current is due to the inductance placed at the end of B1, and therefore conforms to the current distribution characteristics of a magnetic flux loop antenna during operation.

[0258] In conjunction with the foregoing description, in this example and in the subsequent descriptions of the coupled-feed magnetic flux loop antenna, the position of the feed stub can be flexibly set, and the length of the feed stub can be used to adjust the port matching of the antenna.

[0259] The above conclusions will be verified using a coupled-fed magnetic flux loop monopole antenna as an example.

[0260] For example, in combination Figure 52 This diagram illustrates the S11 comparison of the coupled-feed magnetic flux loop antenna under different feed stub lengths, while keeping other conditions constant. It can be seen that S11 changes significantly when the CB1 length is set to 2.5mm, 5mm, or 7.5mm. Specifically, this manifests as a significant change in the resonance depth and a slight frequency offset. This change is consistent with the trend of S11 variation under port matching changes. Further verification will be conducted later using a comparison with Smith charts. Please refer to [reference needed]. Figure 53It can be seen that with the increase of the length of CB1, the impedance circle is getting larger, and thus the port matching of the antenna is also changing. For example, in the current environment, it can be seen that the port matching is relatively good when CB1 is between 2.5 mm and 5 mm, and thus better radiation performance in the current environment can be obtained. In combination with Figure 54 the efficiency diagram, it can be seen that under different lengths of CB1, due to the change of the port matching, the radiation efficiency has a relatively obvious change at about 1.5 GHz. However, it can also be seen that the gap of the radiation efficiency is not large, and thus it can be considered that the difference is caused by the difference in the port matching state.

[0261] The influence of the feed branch at different positions on the radiation of the antenna is verified below in combination with the drawings. For example, in combination with Figure 54 , the S parameter simulation diagram of the antenna under different CB1 positions is shown. Among them Figure 54 , (a) shows the comparison of S11, Figure 55 , (b) shows the comparison of the Smith circle diagram. It can be seen that when CB1 is in the center and CB1 is in the position of 4.5 mm left of the center, S11 and the Smith circle diagram do not change significantly. It can be understood that when CB1 moves to the right, the conclusion is similar. In combination with Figure 46 , the efficiency simulation diagram is shown. It can be seen that under different positions of CB1, such as CB1 in the center and CB1 in the position of 4.5 mm left of the center, the radiation efficiency does not change significantly.

[0262] Thus, the conclusion mentioned in the above description that the length of the feed branch can be used for port matching and the position of the feed branch can be flexibly set can be proved. The conclusion is also applicable to other coupled feed magnetic current loop antennas. The subsequent description will not be repeated.

[0263] It should be noted that in some other embodiments of the present application, based on the composition of the coupled feed magnetic current loop monopole as shown in Figure 56 , the radiation efficiency can also be enhanced by connecting more inductors in series on the radiation branch B1. For example, in the example as shown in Figure 45 , an inductor L CM3 in series can be arranged on B1 to make the electric field distribution more uniform, thereby improving the radiation efficiency. In different implementations of the present application, the position of the inductor connected in series on the radiator and the number of inductors can be flexibly selected according to actual needs, and the embodiments of the present application do not limit this. For example, the value range of the inductor L CM3 can refer to the range of the inductor L b in series mentioned in the above description, and will not be repeated here.

[0264] In addition, in this example, the coupling feeding is described by using the feeding branch with the composition as shown in (a) of Figure 45 It should be understood that when the coupling feeding is performed by using the feeding branch with other compositions as shown in (a) of Figures 46-56 The effects in the above examples can also be achieved when the coupling feeding is performed by using the feeding branch with other compositions, which will not be described herein.

[0265] In different implementations, the implementation of the magnetic current loop monopole antenna with any of the compositions as shown in (a) of Figure 57 may be different. For example, in some embodiments, the radiating branches of the magnetic current loop monopole antenna can be fully or partially reused with the metal frame of the electronic device. In some other embodiments, the radiating branches of the magnetic current loop monopole antenna can also be implemented in the form of a flexible printed circuit (FPC), a metal frame diecasting for anodicoxidation (MDA) process, and the like. The embodiments of this application do not limit the implementation form of the magnetic current loop monopole antenna.

[0266] The above is a description of the coupling feeding scheme provided by the embodiments of this application in combination with the magnetic current loop monopole antenna. In the following, the coupling feeding scheme provided by the embodiments of this application is further described by taking the magnetic current loop antenna as an example.

[0267] It should be understood that the existing monopole antenna is implemented by a 1 / 4 wavelength radiating structure. Correspondingly, the dipole antenna is implemented by a 1 / 2 wavelength radiating structure based on the mirror principle.

[0268] In this example, the existing dipole is improved to obtain the corresponding coupling-fed magnetic current loop dipole antenna.

[0269] In combination with Figure 25 , a composition diagram of a magnetic current loop dipole antenna provided by the embodiments of this application is shown. Similar to the direct feeding scheme design of Figure 26 , the magnetic current loop dipole antenna shown in this example can include at least two radiating branches, such as B2 and B3. The opposite ends of the B2 and B3 can be isolated by a gap. The end of the B2 away from the B3 and the end of the B3 away from the B2 can be grounded by inductance, respectively. For example, the end of the B2 away from the B3 can be grounded by inductance L CD1 , and correspondingly, the end of the B3 away from the B2 can be grounded by inductance L CD2 . For example, the inductance L CD1 , the inductance L CD2 may be in the range of 0.1-10 nH.a The details are not repeated here.

[0270] It should be noted that in combination with the above description of the distance between the inductor and the feed point in the direct feed scheme, in some implementations of the present example, the distance between the inductor L CD1 and the gap (i.e., the inductor L CD1 close to the end of B3) can be between 1 / 8 wavelength and 1 wavelength of the operating wavelength, thereby obtaining a magnetic current loop radiation with uniform electric field characteristics. Similarly, in some other implementations of the present example, the distance between the inductor L CD2 and the gap (i.e., the inductor L CD2 close to the end of B2) can be between 1 / 8 wavelength and 1 wavelength of the operating wavelength, thereby obtaining a magnetic current loop radiation with uniform electric field characteristics.

[0271] In the embodiments of the present application, the size of the radiation branch of the magnetic current loop dipole antenna can be related to the operating frequency band. For example, the length of B2 or B3 can be less than 1 / 4 of the wavelength corresponding to the operating frequency band. That is, the length of the radiation branch composed of B2 and B3 in the embodiments of the present application can be less than 1 / 2 of the wavelength corresponding to the operating frequency band. In some embodiments, the length of the radiation branch composed of B2 and B3 can also be greater than 1 / 4 of the operating frequency band. The wavelength corresponding to the operating frequency band can be the wavelength of the center frequency point of the operating frequency band.

[0272] In some embodiments, when the coupled-fed magnetic current loop dipole antenna is arranged in an electronic device, the configuration position and method examples are similar to those of the direct-fed scheme shown in Figure 57 , and the details are not repeated here.

[0273] As a possible implementation of a magnetic current loop antenna, the magnetic current loop dipole antenna provided in the present example, which is composed as shown in Figure 58 , can generate a uniform electric field in the vicinity of the antenna radiator during operation. For example, Figure 58 shows an electric field simulation diagram of the magnetic current loop dipole antenna provided in the present example in a working scenario. Among them, Figure 58 (a) in shows a diagram of the actual simulation results. In order to make the description more clear, Figure 59 (b) in shows a logical diagram of the electric field distribution. It can be seen that during the operation of the magnetic current loop dipole antenna, a uniformly distributed electric field can be generated in the area surrounded by B2, B3, the reference ground, and CB1. Therefore, the magnetic current loop dipole antenna meets the radiation characteristics of the magnetic current loop antenna.

[0274] The coupling-fed magnetic current loop-dipole antenna provided in the embodiments of the present application can generate a uniformly distributed electric field around the antenna radiator, and has good radiation performance for covering at least one working frequency band.

[0275] For example, the simulation results of the coupling-fed magnetic current loop-dipole antenna are described below. Figure 60 and Figure 59 For example, the simulation results of the coupling-fed magnetic current loop-dipole antenna are described below.

[0276] As shown in Figure 59 , it is an S parameter simulation diagram of the coupling-fed magnetic current loop-dipole antenna provided in the embodiments of the present application. As shown in Figure 59 (a), the magnetic current loop-dipole antenna in this example can generate a resonance at about 1.8 GHz. The -2 dB bandwidth of the resonance on S11 is close to 200 MHz, and the deepest point is more than -10 dB. As shown in Figure 60 (b), the coupling-fed magnetic current loop-dipole antenna provided in the embodiments of the present application has good port matching characteristics on the Smith chart without any matching circuit. Therefore, the coupling-fed magnetic current loop-dipole antenna provided in the embodiments of the present application can save the space occupied by the matching circuit during configuration.

[0277] As shown in Figure 57 , it is an efficiency diagram of the coupling-fed magnetic current loop-dipole antenna provided in the embodiments of the present application. It can be seen that the radiation efficiency is more than -1 dB between 1.4 GHz and 2.5 GHz, close to 0 dB, and the corresponding system efficiency peak is also more than -1 dB, and the -2 dB bandwidth is more than 200 MHz. Therefore, the coupling-fed magnetic current loop-dipole antenna provided in the embodiments of the present application can cover at least one working frequency band, thereby effectively supporting the wireless communication function of the electronic device.

[0278] It should be noted that in other embodiments of the present application, based on the composition of the coupling-fed magnetic current loop-dipole antenna as shown in Figure 57 , the radiation efficiency can also be enhanced by connecting more inductors in series on the radiators B2 and / or B3. For example, in the example as shown in Figure 45 , an inductor L CD3 may be connected in series on B2 to make the electric field distribution more uniform, thereby improving the radiation efficiency. Of course, in other embodiments, an inductor can also be connected in series on B3, or one or more inductors can be connected in series on B2 and B3 for improving the radiation efficiency of the antenna. In different implementations of the present application, the setting of the inductor position connected in series on the radiator and the setting of the number of inductors can be flexibly selected according to actual needs, and the embodiments of the present application do not limit this. For example, the inductor L CD3The value range of L can be referenced in the above description, which is also a series inductor. b The scope will not be elaborated here.

[0279] Furthermore, in this example, it is adopted as follows Figure 45 The composition of the feed stub shown in (a) is explained for coupled feeding. It should be understood that when using... Figures 57-61 When other components of the feed branch are coupled and fed, the same effect as in the example above can be obtained, which will not be elaborated here.

[0280] In different specific implementation processes, it has the following characteristics: Figure 62 The specific implementation of any of the constituent components of a magnetohydrodynamic (MHD) dipole antenna can vary. For example, in some embodiments, the radiating stubs of the MHD dipole antenna can fully or partially reuse the metal frame of the electronic device. In other embodiments, the radiating stubs of the MHD dipole antenna can also be implemented using flexible printed circuits (FPCs), metalframe die-casting for anodic oxidation (MDA), or other similar methods. This application does not limit the specific implementation of the MHD dipole antenna.

[0281] The above describes the coupling feeding scheme provided in the embodiments of this application in conjunction with magnetic flux loop dipole antennas and other magnetic flux loop antennas. The following description continues with the coupling feeding scheme provided in the embodiments of this application in conjunction with magnetic flux loop slot antennas, such as magnetic flux loop left-handed antennas and magnetic flux loop slot antennas.

[0282] In this example, an existing left-handed pole is improved to obtain a corresponding coupled-fed magnetohydrodynamic loop left-handed antenna.

[0283] Combination Figure 32 This is a schematic diagram illustrating the composition of a coupled-fed magnetic flux loop left-handed antenna provided in an embodiment of this application. Similar to... Figure 32 In this example, the magnetic flux loop left-handed antenna, designed for direct feed, may include at least one radiating stub B4. One end of B4 may be grounded. The other end of B4 may be grounded via capacitor C1. The left-handed characteristic of the antenna is achieved based on C1. In some embodiments, the capacitance value of C1 may not exceed 3pF.

[0284] An inductor L can be connected in series with the radiator near the ground terminal on B4. CC1 The inductor L CC1 It can be used to create a uniformly distributed electric field between the radiator and the reference ground when B4 is in operation, thereby obtaining the radiation characteristics of the magnetic flux loop antenna.

[0285] In different embodiments, the position of the inductor L CC1 may be flexible. In addition, the value range of the inductor L CC1 may refer to the range of the inductor L b in the above description, which will not be repeated here.

[0286] It should be noted that, in combination with the above description of the distance between the inductor and the feeding point in the direct feeding scheme, in some implementations of the present example, the distance between the inductor L CC1 and the end of C1 close to B4 can be controlled to be between 1 / 8 wavelength and 1 wavelength of the working wavelength, so as to obtain a magnetic current loop radiation with uniform electric field characteristics.

[0287] In some embodiments, when the coupled-fed magnetic current loop left-handed antenna is arranged in an electronic device, its configuration position and method examples are similar to those of the direct-fed scheme shown in Figure 62 , which will not be repeated here.

[0288] As a possible implementation of a magnetic current loop antenna, the magnetic current loop left-handed antenna provided in the present example has a structure as shown in Figure 63 , which can generate a uniform electric field near the antenna radiator during operation. For example, Figure 63 shows an electric field simulation diagram of the magnetic current loop left-handed antenna provided in the present example in a working scenario. Among them, Figure 63 (a) in FIG. 1 shows a schematic diagram of the actual simulation result. In order to make the description clearer, Figure 64 (b) in FIG. 1 shows a logical diagram of the electric field distribution. It can be seen that during the operation of the magnetic current loop left-handed antenna, a uniformly distributed electric field can be generated in the area surrounded by B4, the reference ground, and CB1. Therefore, the magnetic current loop left-handed antenna meets the radiation characteristics of the magnetic current loop antenna.

[0289] The coupled-fed magnetic current loop left-handed antenna provided in the embodiments of the present application can generate a uniformly distributed electric field around the antenna radiator, and also has good radiation performance for covering at least one working frequency band.

[0290] Exemplarily, the radiation of the coupled-fed magnetic current loop left-handed antenna will be described below in combination with the simulation results of Figure 65 and Figure 64 .

[0291] As shown in Figure 64 , it is an S parameter simulation diagram of the coupled-fed magnetic current loop left-handed antenna provided in the embodiments of the present application. As shown in Figure 64As shown in (a) of the diagram, the magnetic flux loop left-handed antenna in this example can generate a resonance at around 2.3 GHz. This resonance has a -2 dB bandwidth on S11 close to 200 MHz, with a maximum depth exceeding -14 dB. Figure 65 As shown in (b), the coupled-fed magnetic flux loop left-handed antenna provided in this embodiment of the application exhibits good port matching characteristics on the Smith chart without any matching circuitry. This also allows the coupled-fed magnetic flux loop left-handed antenna provided in this embodiment of the application to save space occupied by matching circuitry during configuration.

[0292] like Figure 62 The diagram shows the efficiency of the coupled-fed magnetic flux loop left-handed antenna provided in this embodiment. It can be seen that the radiation efficiency between 1.4 GHz and 2.5 GHz is above -1 dB, approaching 0 dB, and the corresponding system efficiency peak also exceeds -1 dB, with a -2 dB bandwidth exceeding 200 MHz. Therefore, the coupled-fed magnetic flux loop left-handed antenna provided in this embodiment can cover at least one operating frequency band, thereby effectively supporting the wireless communication function of electronic devices.

[0293] It should be noted that in some other embodiments of this application, based on such Figure 66 The composition of the coupled-fed magnetic flux loop left hand shown can also achieve enhanced radiation efficiency by connecting more inductors in series on the radiating stub B4. For example, in... Figure 45 In the example, an inductor L can be connected in series with B4. CC2 This makes the electric field distribution more uniform, thereby improving radiation efficiency. In different implementations of this application, the location and number of inductors connected in series with the radiator can be flexibly selected according to actual needs, and the embodiments of this application do not impose any limitations on this. For example, the inductor L CC2 The value range of L can be referenced in the above description, which is also a series inductor. b The scope will not be elaborated here.

[0294] Furthermore, in this example, it is adopted as follows Figure 45 The composition of the feed stub shown in (a) is explained for coupled feeding. It should be understood that when using, as shown in... Figures 62-66 When other components of the feed branch are coupled and fed, the same effect as in the example above can be obtained, which will not be elaborated here.

[0295] In different specific implementation processes, it has the following characteristics: ​The specific implementation of the magnetic current loop left-handed antenna composed of any one of the above can be different. For example, in some embodiments, the radiating branch of the magnetic current loop left-handed antenna can be wholly or partially reused with the metal frame of the electronic device. In other embodiments, the radiating branch of the magnetic current loop left-handed antenna can also be implemented in the form of a flexible printed circuit (FPC), a metal frame diecasting for anodicoxidation (MDA), or the like. The embodiments of the present application do not limit the specific implementation form of the magnetic current loop left-handed antenna.

[0296] Reference is made to Figure 67 for a composition diagram of a magnetic current loop slot antenna provided by the embodiments of the present application.

[0297] It should be understood that, based on the mirror principle, in combination with Figure 62 , the structure composition of the magnetic current loop slot antenna provided by the present example can be obtained in the case that the magnetic current loop left-handed antenna is provided with a PMC on the left side thereof in a mirror arrangement. The feed point of the magnetic current loop slot antenna can be arranged at the middle position of the PMC. The composition of a magnetic current loop slot antenna and its working condition are described below in combination with Figure 67 .

[0298] As shown in Figure 67 , the radiating branch of the magnetic current loop slot antenna shown in the present example can include at least two radiators, such as B5 and B6. The opposite ends of the B5 and B6 can be separated by a slot.

[0299] The ends of the B5 and B6 away from each other can be coupled to the ground. In the present example, an inductor can be connected in series on the B5 and B6. For example, an inductor L CS1 can be connected in series on the B6. CS2 .

[0300] In the present example, by arranging the inductors on the B5 and B6 respectively, a uniform electric field can be formed between the radiators CB1 and the reference ground between the two inductors, so as to obtain the radiation characteristics of the magnetic current loop slot antenna. For example, the value range of the inductors L CS1 and L CS2 can refer to the range of the inductor L b mentioned above.

[0301] It should be noted that, in combination with the above description of the distance between the inductor and the feed point in the direct feeding scheme, in some implementations of the present example, the inductor L CS1 can also be controlled in combination with the slot (i.e. the inductor L CS1The distance between B5 and B6 (i.e. the end of B5 close to B6) can be between 1 / 8 wavelength and 1 wavelength of the working wavelength, so as to obtain the magnetic current loop radiation with uniform electric field characteristics. CS2 The distance between B5 and B6 (i.e. the end of B5 close to B6) can be between 1 / 8 wavelength and 1 wavelength of the working wavelength, so as to obtain the magnetic current loop radiation with uniform electric field characteristics. CS2 The distance between B5 and B6 (i.e. the end of B5 close to B6) can be between 1 / 8 wavelength and 1 wavelength of the working wavelength, so as to obtain the magnetic current loop radiation with uniform electric field characteristics.

[0302] In some embodiments, when the coupled-fed magnetic current loop slot antenna is arranged in an electronic device, the arrangement position and method examples are similar to those of the direct-fed scheme shown in Figure 38 and will not be described herein again.

[0303] As a possible implementation of the magnetic current loop antenna, the magnetic current loop slot antenna provided in the present example has a structure as shown in Figure 67 which can generate uniform electric field around the antenna radiator during operation. For example, Figure 68 shows the electric field simulation diagram of the magnetic current loop slot antenna provided in the present example in one working scenario. In the diagram, Figure 68 (a) in the diagram shows the simulation result. For a clearer illustration, Figure 68 (b) in the diagram shows the logical diagram of the electric field distribution. It can be seen that, during the operation of the magnetic current loop slot antenna, uniform electric field can be generated in the area surrounded by B5, B6, the reference ground and CB1. Therefore, the magnetic current loop slot antenna meets the radiation characteristics of the magnetic current loop antenna.

[0304] The coupled-fed magnetic current loop slot antenna provided in the present application can generate uniform electric field around the antenna radiator, and has good radiation performance for covering at least one working frequency band.

[0305] For example, the radiation of the coupled-fed magnetic current loop slot antenna is described below in combination with the simulation results of Figure 69 and Figure 70 .

[0306] As shown in Figure 69 , the S parameter simulation diagram of the coupled-fed magnetic current loop slot antenna provided in the present application is shown. As shown in Figure 69 (a) in the diagram, the magnetic current loop slot antenna in the present example can generate a resonance at about 2 GHz. The -2 dB bandwidth of the resonance on S11 is close to 200 MHz, and the deepest point is more than -10 dB. As shown in Figure 69As shown in (b), the coupled-fed magnetic flux loop slot antenna provided in this embodiment exhibits good port matching characteristics on the Smith chart even without any matching circuitry. This also allows the coupled-fed magnetic flux loop slot antenna provided in this embodiment to save space occupied by matching circuitry during configuration.

[0307] like Figure 70 The diagram shows the efficiency of the coupled-fed magnetic flux loop slot antenna provided in this embodiment. It can be seen that the radiation efficiency between 1.4 GHz and 2.5 GHz is above -1 dB, approaching 0 dB, and the corresponding system efficiency peak also exceeds -1 dB, with a -2 dB bandwidth exceeding 200 MHz. Therefore, the coupled-fed magnetic flux loop slot antenna provided in this embodiment can cover at least one operating frequency band, thereby effectively supporting the wireless communication function of electronic devices.

[0308] It should be noted that in some other embodiments of this application, based on such Figure 67 The configuration of the coupled-fed magnetohydrodynamic loop gap shown can be further enhanced by connecting more inductors in series with radiators B5 and / or B6, thereby achieving improved radiation efficiency. For example, in... Figure 71 In the example, an inductor L can be connected in series with B5. CS3 This makes the electric field distribution more uniform, thereby improving radiation efficiency. In different implementations of this application, the location and number of inductors connected in series with the radiator can be flexibly selected according to actual needs, and the embodiments of this application do not impose any limitations on this. For example, the inductor L CS3 The value range of L can be referenced in the above description, which is also a series inductor. b The scope will not be elaborated here.

[0309] Furthermore, in this example, it is adopted as follows Figure 45 The composition of the feed stub shown in (a) is explained for coupled feeding. It should be understood that when using, as shown in... Figure 45 When other components of the feed branch are coupled and fed, the same effect as in the example above can be obtained, which will not be elaborated here.

[0310] In different specific implementation processes, it has the following characteristics: Figures 67-71The specific implementation of the magnetic current loop slot antenna composed of any one of the above components can be different. For example, in some embodiments, the radiating branch of the magnetic current loop slot antenna can be fully or partially reused with the metal frame of the electronic device. In other embodiments, the radiating branch of the magnetic current loop slot antenna can also be implemented in the form of a flexible printed circuit (FPC), a metal frame die casting for anodicoxidation (MDA) process, or the like. The embodiments of the present application do not limit the specific implementation form of the magnetic current loop slot antenna.

[0311] Although the present application has been described in connection with certain specific features and embodiments thereof, it is to be understood that it is not to be limited to the features or embodiments specifically described, but rather can include any and all implementations within the spirit and / or scope of the present application. Accordingly, the specification and drawings are to be regarded in an illustrative, rather than a restrictive, sense. It is to be understood that features of the present application can be combined with features of other applications, without departing from the scope of the present application.

Claims

1. A terminal antenna, characterized in that, the antenna comprises a radiating branch, the radiating branch comprises a first radiator, a first end of the first radiator is electrically connected with a reference ground, and a first inductor is connected in series on the first radiator; when the terminal antenna is directly fed through a feeding point, a second end of the first radiator is electrically connected with the feeding point through a left-handed capacitor; when the terminal antenna is coupled fed, the second end of the first radiator is grounded through the left-handed capacitor; the terminal antenna further comprises a feeding branch, the feeding branch is not connected with the radiating branch, the feeding branch is arranged between the radiating branch and the reference ground, a feeding point is arranged on the feeding branch, and the feeding branch is used for coupling feeding to the radiating branch; wherein the first inductor is used for generating a uniform electric field between a first radiating part and the reference ground for radiation; the first radiating part comprises a radiator between the first inductor and the left-handed capacitor on the first radiator. 2.The terminal antenna of claim 1, characterized in that, when a working frequency band of the antenna is 450 MHz-1 GHz, an inductance of the first inductor is set within [5 nH, 47 nH]; when the working frequency band of the antenna is 1 GHz-3 GHz, the inductance of the first inductor is set within [1 nH, 33 nH]; when the working frequency band of the antenna is 3 GHz-10 GHz, the inductance of the first inductor is set within [0.5 nH, 10 nH].

3. The terminal antenna according to claim 1 or 2, characterized in that the feeding branch comprises a first feeding part, the feeding point is connected at a center of the first feeding part, and both ends of the first feeding part are suspended.

4. The terminal antenna according to claim 1 or 2, characterized in that, the feeding branch comprises a second feeding part, both sides of the second feeding part are respectively grounded through inductors, and the feeding point is connected in series on the second feeding part.

5. The terminal antenna according to claim 1 or 2, characterized in that, the feeding branch comprises a third feeding part, the feeding point is connected at one end of the third feeding part.

6. The terminal antenna of claim 5, wherein, the other end of the third feeding part is suspended.

7. The terminal antenna of claim 5, wherein, the other end of the third feeding part is grounded through a third inductor.

8. The terminal antenna of claim 5, wherein, an end of the third feeding part away from the feeding point is grounded; a slit is arranged on the third feeding part, and the slit divides the third feeding part into two parts which are not connected with each other.

9. The terminal antenna of claim 5, wherein, an end of the third feeding part away from the feeding point is grounded; a fourth inductor is connected in series on the third feeding part.

10. The terminal antenna according to claim 1 or 2 or 6 or 7 or 8 or 9, characterized in that, different sizes of the feeding branch correspond to different port impedances of the terminal antenna. 11.The terminal antenna of claim 1 or 2 or 6 or 7 or 8 or 9, characterized in that, when the terminal antenna works, the radiator is distributed with a reverse current.

12. The terminal antenna according to claim 1 or 2 or 6 or 7 or 8 or 9, characterized in that, one or more inductors are connected in series on the first radiator; when multiple inductors are connected in series on the first radiator, at least two inductors among the multiple inductors are arranged apart from the radiator.

13. An electronic device, comprising: the electronic device is provided with at least one processor, a radio frequency module, and the terminal antenna of any one of claims 1-12. The electronic device transmits or receives signals through the radio frequency module and the terminal antenna when transmitting or receiving signals.

Images