A terminal slot antenna

Abstract

The embodiment of the application discloses a terminal slot 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 and a second 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. A first end of the second radiator is electrically connected with the reference ground, and a second inductor is connected in series on the second radiator. When the terminal slot antenna is fed through a feed point, a second end of the first radiator and a second end of the second radiator are electrically connected through the feed point. When the terminal slot antenna is coupled feeding, the second end of the first radiator and the second end of the second radiator are suspended. The terminal slot antenna further comprises a feed branch, the feed branch is arranged between the radiation branch and the reference ground, 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 slot antenna, such as a magnetic current loop slot antenna. BACKGROUND

[0002] With the development of electronic devices, the environment in which antennas can be disposed in electronic devices is becoming increasingly poor. As a result, existing antenna forms have gradually been unable to meet the needs of electronic devices for wireless communication quality.

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

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

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

[0006] In a first aspect, a terminal slot antenna is provided, which includes a radiation branch, the radiation branch including a first radiator and a second radiator, a first end of the first radiator being electrically connected to a reference ground, and a first inductance being connected in series to the first radiator. A first end of the second radiator is electrically connected to the reference ground, and a second inductance is connected in series to the second radiator. When the terminal slot antenna is fed through a feed point, a second end of the first radiator and a second end of the second radiator are electrically connected through the feed point. When the terminal slot antenna is coupled fed, the second end of the first radiator and the second end of the second radiator are suspended. The terminal slot antenna further includes a feed branch, which is not connected to the radiation branch, the feed branch being disposed between the radiation branch and the reference ground, and the feed branch being provided with a feed point, the feed branch being used for coupled feeding to the radiation branch.

[0007] Based on the scheme, a new type of antenna with working mechanism is provided. For example, since the antenna can form a closed magnetic current loop during operation, it can be called a magnetic current loop antenna. In this example, the magnetic current loop antenna can be obtained by improving the existing slot antenna. In some embodiments, the magnetic current loop slot antenna can be fed in the form of direct feeding. In other embodiments, the magnetic current loop slot antenna can also be fed in the form of coupled feeding. The magnetic current loop slot antenna provided by the embodiments of the present application can provide better radiation performance compared to other existing antennas such as slot antennas in the same environment. For example, the radiation efficiency is higher, the system efficiency is also correspondingly higher, the bandwidth and the radiation pattern are significantly improved, and in addition, the SAR value can be lower.

[0008] In a possible design, when the working frequency band of the antenna is 450MHz-1GHz, the inductance of the first inductor and the second inductor is set to [5nH, 47nH]. When the working frequency band of the antenna is 1GHz-3GHz, the inductance of the first inductor and the second inductor is set to [1nH, 33nH]. When the working frequency band of the antenna is 3GHz-10GHz, the inductance of the first inductor and the second inductor is set to [0.5nH, 10nH]. Based on the scheme, the range of the grounding inductor is limited. Within the limited range, the antenna can generate a more uniform electric field during operation, thereby improving the radiation performance. It should be noted that in different implementations, the inductance of the first inductor can be the same as that of the second inductor, and the inductance of the first inductor and the second inductor can also be different.

[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 the two ends of the first feeding part are suspended. Based on the 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 example to radiate with the current loop antenna radiation characteristics.

[0010] In a possible design, the feeding branch includes a second feeding part, the two sides of the second feeding part are respectively grounded through inductance, and the feeding point is connected in series on the second feeding part. Based on the 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 example to radiate with the current loop antenna radiation characteristics.

[0011] In a possible design, the feeding branch includes a third feeding section, and the feeding point is connected to a side end of the third feeding section. 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.

[0012] In a possible design, the other side end of the third feeding section is suspended. 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.

[0013] In a possible design, the other side end of the third feeding section is grounded through a third inductor. 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.

[0014] In a possible design, the end of the third feeding section away from the feeding point is grounded. A through gap is arranged on the third feeding section, and the gap divides the third feeding section into two unconnected parts. 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 end of the third feeding section away from the feeding point is grounded. A fourth inductor is arranged in series on the third feeding section. 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 gap antenna corresponding to the feeding branch of different sizes has different port impedances. Based on this scheme, a scheme example of adjusting the port impedance of the magnetic current loop antenna is provided. For example, the port impedance of the terminal gap antenna can be adjusted by adjusting the size of the feeding branch.

[0017] In a possible design, when the terminal gap antenna is working, a uniform electric field is distributed between the radiation branch and the reference ground. 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 by the embodiments of the present application.

[0018] In a possible design, when the terminal slot antenna is in operation, a reverse current is distributed on the radiator. Based on this scheme, an example of current distribution characteristics of the magnetic current loop antenna is provided. It can be understood that, when the existing slot antenna is in operation in the 1 / 4 wavelength mode, no reverse current is generated on the radiator. In the example, the magnetic current loop slot antenna is provided with at least two grounding inductors, so that even when the antenna is in operation in the 1 / 4 wavelength mode, a reverse current is distributed on the radiator.

[0019] In a possible design, one or more inductors are connected in series on the first radiator. And / or, one or more inductors are connected in series on the second radiator. When a plurality of inductors are connected in series on the radiator (such as the first radiator and / or the second radiator), at least two inductors of the plurality of inductors are arranged apart from the radiator. Based on this scheme, an enhanced design scheme of the magnetic current loop slot antenna is provided. For example, one or more inductors can be connected in series on the radiator, so that the distribution of the electric field between the radiator 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 slot antenna (such as a magnetic current loop slot antenna) as described in the first aspect and any possible design thereof. When the electronic device performs signal transmission or reception, the signal transmission or reception is performed by the radio frequency module and the terminal slot antenna.

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

[0022] Figure 1 FIG. 1 is a schematic diagram of a floor current distribution;

[0023] Figure 2 FIG. 2 is a schematic diagram of a floor electric field distribution;

[0024] Figure 3 FIG. 3 is a schematic diagram of an antenna distribution on a floor;

[0025] Figure 4 FIG. 4 is a schematic diagram of an ILA antenna in operation;

[0026] Figure 5 FIG. 5 is a schematic diagram of an electronic device provided by an embodiment of the present application;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0060] Figure 38 An efficiency simulation schematic diagram of a magnetic current loop left-handed antenna provided for an embodiment of the present application;

[0061] Figure 39 An efficiency simulation schematic diagram of a magnetic current loop left-handed antenna provided for an embodiment of the present application;

[0062] Figure 40 An efficiency simulation schematic diagram of a magnetic current loop left-handed antenna provided for an embodiment of the present application;

[0063] Figure 41 An efficiency simulation schematic diagram of a magnetic current loop left-handed antenna provided for an embodiment of the present application;

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

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

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

[0067] Figure 45 An efficiency simulation schematic diagram of a magnetic current loop left-handed antenna provided for an embodiment of the present application;

[0068] Figure 46 An efficiency simulation schematic diagram of a magnetic current loop left-handed antenna provided for an embodiment of the present application;

[0069] Figure 47 An efficiency simulation schematic diagram of a magnetic current loop left-handed antenna provided for an embodiment of the present application;

[0070] Figure 48 An efficiency simulation schematic diagram of a magnetic current loop left-handed antenna provided for an embodiment of the present application;

[0071] Figure 49 An efficiency simulation schematic diagram of a magnetic current loop left-handed antenna provided for an embodiment of the present application;

[0072] Figure 50 An efficiency simulation schematic diagram of a magnetic current loop left-handed antenna provided for an embodiment of the present application;

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

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

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

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

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

[0078] Figure 56 A schematic diagram of a magnetic current loop monopole antenna with coupled feeding provided for an embodiment of the present application;

[0079] Figure 57 A schematic diagram of a magnetic current loop dipole antenna with coupled feeding provided for an embodiment of the present application;

[0080] Figure 58 A simulation schematic diagram of electric field of a magnetic current loop dipole antenna with coupled feeding provided for an embodiment of the present application;

[0081] Figure 59 A simulation schematic diagram of S parameters of a magnetic current loop dipole antenna with coupled feeding provided for an embodiment of the present application;

[0082] Figure 60 A simulation schematic diagram of efficiency of a magnetic current loop dipole antenna with coupled feeding provided for an embodiment of the present application;

[0083] Figure 61 A schematic diagram of a magnetic current loop dipole antenna with coupled feeding provided for an embodiment of the present application;

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

[0085] Figure 63 A simulation schematic diagram of electric field of a magnetic current loop left-handed antenna with coupled feeding provided for an embodiment of the present application;

[0086] Figure 64 A simulation schematic diagram of S parameters of a magnetic current loop left-handed antenna with coupled feeding provided for an embodiment of the present application;

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

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

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

[0090] Figure 68 An electric field simulation schematic diagram of a coupled-fed magnetic current loop slot antenna provided for an embodiment of the present application;

[0091] Figure 69 An S parameter simulation schematic diagram of a coupled-fed magnetic current loop slot antenna provided for an embodiment of the present application;

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

[0093] Figure 71 A schematic diagram of a coupled-fed magnetic current loop slot antenna 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 floor eigenmodes when being set, so as to obtain better radiation performance.

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

[0098] In addition, Figure 2 The floor eigenmode is shown in the electric field distribution at low frequency (such as 0.85 GHz), medium frequency (such as 1.97 GHz), and high frequency (such as 2.32 GHz). 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 the two ends of the y direction of the floor. The stronger electric field distribution at 1.97 GHz is at the two ends of the y direction of the floor and the middle area of the y direction of the floor. The stronger electric field distribution at 2.32 GHz tends to the edge, distributed in the four edge areas as shown in Figure 2 It can be understood that the electric field type antenna can be set in the area 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 an example. The electric field type antenna can be set at positions 1-4 and positions 1'-4' as shown in Figure 3 so that 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 its setting position 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 type 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 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 Fig. 1 is a schematic diagram of an ILA antenna. It can be seen that when the ILA antenna is working in the ¼ wavelength mode, a non-reversed current 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 the 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 higher and the potential near the feed point is lower, the current shown in Fig. 1 can be formed. Figure 4

[0104] Referring to the ground as a zero potential reference, due to the uneven distribution of the potential on the radiator, an uneven electric field between the radiator of the ILA antenna and the ground is also caused. For example, in the scenario shown in Fig. 2, the electric field near the end of the ILA antenna is strong, and the closer to the feed point, the weaker the electric field. Figure 4

[0105] Similarly, other electric field type antennas can also generate uneven electric fields due to the uneven distribution of the potential on the radiator. Therefore, the radiation performance of the antenna is limited.

[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 the operation of the antenna, 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.

[0108] The magnetic current loop antenna scheme provided in the embodiments of the present application and the specific use of the magnetic current loop antenna scheme 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, and is used for supporting 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, and the electronic device can also be a smart watch and the like wearable electronic device. The embodiments of the present application do not specially limit the specific form of the device.

[0111] Please refer to Figure 5 , a structural schematic diagram of an electronic device 500 provided by the embodiments of the present application is shown. As shown in Figure 5 , the electronic device 500 provided by 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] Among them, 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, and provides rigid support for the electronic device 500. The internal structure 503 can include a collection of electronic components and mechanical components for realizing various functions of the electronic device 500. For example, the internal structure 503 can include a shielding cover, a screw, a reinforcing rib, and the like. The back cover 504 can be the appearance surface of the back of the electronic device 500, and the back cover 504 can use glass material, ceramic material, plastic, and the like in different implementations.

[0113] The magnetic current loop antenna scheme provided by the embodiments of the present application can be applied in the electronic device 500 as shown in Figure 5 , and is used for supporting 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, and the like. Hereinafter, the magnetic current loop antenna arranged on the metal shell 502 is taken as an example.

[0114] As an example, the metal shell 502 has a metal frame structure, and Figure 6 a composition schematic of a metal shell 502 is shown. In this example, the metal shell 502 can adopt a metal material, such as aluminum alloy, and the like. As shown in 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, and is used for providing most of the rigid support, and providing a zero potential reference for various electronic components. As shown in Figure 6In the shown example, a metal frame can also be arranged around the reference ground. The metal frame can be a complete closed metal frame, or can be a metal frame broken by one or more slits, as shown in the example of FIG. 6B. Figure 6 In the example of FIG. 6B, slits 1, 2 and 3 can be arranged at different positions on the metal frame, respectively. These slits can break the metal frame, so as to obtain independent metal branches. In some embodiments, part or all of these metal branches can be used as radiating branches of an antenna, so as to realize structural reuse in the antenna arrangement process, and reduce the difficulty of antenna arrangement. When the metal branches are used as the radiating branches of the antenna, the positions of the slits arranged at one end or both ends of the metal branches can be flexibly selected according to the arrangement of the antenna. Figure 6

[0115] In the example of FIG. 6C, one or more metal pins can also be arranged on the metal frame. In some examples, a screw hole can be arranged on the metal pin, for fixing other structural members by a screw. In other examples, the metal pin can be coupled with a feeding point, so as to feed the antenna through the metal pin when the metal branch connected with the metal pin is used as the radiating branch of the antenna. In other examples, the metal pin can also be coupled with other electronic components, to realize corresponding electrical connection functions. Figure 6

[0116] In the 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 circuit, a speak box, etc. For example, the sub board can also be used to carry radio frequency circuit and the like of the antenna arranged on the bottom (i.e., the y-axis negative direction part of the electronic device).

[0117] The magnetic current loop antennas provided in the embodiments of the present application can be applied to electronic devices composed of, for example, as shown in FIG. 7A or FIG. 7B. Figure 5 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 provided in the electronic device. The communication module can include an antenna, a radio frequency module that interacts with the antenna, and a processor that interacts with the radio frequency module. For example, the interaction between the radio frequency module and the antenna can be analog signal interaction. The interaction between the radio frequency module and the processor can be analog 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 example is described. For example, the coordinate setting in the following description is set as an example of the back view of the electronic device corresponding to the structure. 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. With 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 set on the part of the electronic device in the vertical direction of the y-axis positive direction, 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 x-axis and y-axis settings, the positive direction of the z-axis is the direction along the back of the electronic device to the front (i.e. the display), 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 schemes 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 present application, the uniform electric field can be an electric field with the same direction and uniform intensity distribution in a certain spatial region.

[0123] For example, referring to Figure 8AThis is a schematic diagram showing the distribution of the electric field and magnetic current near the magnetic flux loop antenna provided in this embodiment of the application during operation. It should be noted that... Figure 8A The examples are only for illustrating the distribution of electric field and magnetic current, and do not constitute any limitation on the structure and relative position of the antenna itself.

[0124] like Figure 8A As shown, the magnetic flux loop antenna may include at least one radiating stub. This radiating stub can be used to radiate with the radiation characteristics of a magnetic flux loop antenna. Specifically, the radiation characteristics of the magnetic flux loop antenna described in this embodiment may include: generating a uniform electric field distribution between the radiating stub and a reference ground. For example, as... Figure 8A As shown, a uniform downward electric field can be distributed between the antenna radiating stub and the reference ground. Of course, in other scenarios, due to the continuous changes in the feed signal, this electric field can also be uniformly distributed upwards.

[0125] As one possible implementation, the magnetohydrodynamic loop antenna provided in this application embodiment can be based on an existing electric field type antenna, with inductors connected in series and / or in parallel on the radiating stub, and a uniform electric field distribution between the radiating stub and the reference ground can be obtained by utilizing the energy storage characteristics of the inductor for magnetic energy.

[0126] It should be understood that, given a uniformly distributed electric field, a closed magnetic flux loop can form in the space near the radiating stub. That is, the radiation characteristics of the magnetic flux loop antenna involved in this embodiment can also include the generation of a closed magnetic flux loop distribution near the radiating stub. For example, as... Figure 8A As shown, a closed magnetic flux loop can be formed in a counterclockwise direction near the antenna radiating stub. Similar to the description of the electric field distribution above, in other scenarios, since the feed signal is constantly changing, the magnetic flux loop can also be a clockwise closed distribution.

[0127] Based on the above description of the characteristics of the magnetic flux loop antenna provided in the embodiments of this application during operation (such as the radiation characteristics of a magnetic flux loop antenna), since the magnetic flux loop antenna provided in the embodiments of this application can generate a uniform electric field (or a closed magnetic flux loop) for radiation during operation, combined with the foregoing explanation, this magnetic flux loop antenna can provide better radiation performance than a typical electric field type antenna with a non-uniform electric field. For example, Figure 8B This illustration shows the radiation efficiency and system efficiency of the magnetic flux loop antenna provided in this embodiment. For ease of explanation, an efficiency diagram of a conventional antenna scheme (such as a left-handed antenna) under the same conditions is also provided for comparison. Figure 8BAs shown, the radiation efficiency of the magnetic current loop antenna provided by the embodiments of the present application exceeds that of the left-handed antenna by about 1 dB in the frequency range of 2.2 GHz-3 GHz, and thus can provide a better radiation basis. In the case of Figure 8B With the corresponding antenna design, the system efficiency of the magnetic current loop antenna also has a significant improvement over the left-handed antenna. For example, in the case of the peak efficiency angle, the magnetic current loop antenna exceeds -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 embodiments of the present application can be directly fed by a 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 coupled feeding as an example, the feeding branch can be set 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 antenna is not sensitive to the position of the feeding branch, thereby significantly improving the flexibility of setting the feeding branch.

[0129] In different implementations, the magnetic current loop antenna provided by the embodiments of the present application can be divided into different types according to different morphological characteristics. For example, Figure 9 As shown, according to whether a slot or a gap is provided in the antenna, the magnetic current loop antenna is divided into a magnetic current loop wire antenna and a magnetic current loop slot antenna. As an example, the magnetic current loop wire antenna can include a magnetic current loop monopole antenna based on a monopole antenna, and a magnetic current loop dipole antenna based on a dipole, etc. The magnetic current loop slot antenna can include a magnetic current loop slot antenna based on a slot antenna, and a magnetic current loop left-handed antenna based on a left-handed antenna, etc.

[0130] Based on the distribution in the above examples, the structural characteristics of different types of magnetic current loop antennas are exemplarily described below. Figure 10 and Figure 11

[0131] Exemplarily, referring to Figure 10 is a schematic of a magnetic current loop wire antenna provided by the embodiments of the present application. In order to realize the radiation characteristics of the magnetic current loop antenna, an inductor L a parallel to the ground can be added to the radiation branch of the magnetic current loop wire antenna.

[0132] It should be understood that for a general wire antenna, the electric field distribution between the radiation branch and the reference ground during operation is not uniform (as an example of Figure 4 The embodiments of the present application add an inductor L a parallel to the ground to the radiation branch, so that a uniformly distributed electric field can be generated during antenna operation. For example, for the end with a higher potential on the radiation branch (referred to as end 1), the L​a , the charge corresponding to the higher potential can be introduced into the reference ground nearby, thereby effectively reducing the charge amount of the end 1, and thus reducing the potential of the end 1. In addition, for the end (referred to as end 2) with a lower potential on the radiation branch, through the L a , due to the energy storage characteristics of the inductance to the magnetic energy, when the current on the radiation branch reverses due to the change of the feed signal, the change of the current on the radiation branch will be delayed compared with the change of the voltage, and thus a stronger electric field distribution is obtained in the area with lower electric field distribution (i.e. the area near the end 2). In this way, through the L a , the effect of weakening the electric field near the end 1 and enhancing the electric field near the end 2 can be achieved. Thus, a relatively uniform electric field distribution between the radiation branch and the reference ground can be obtained. That is, the radiation characteristics of the magnetic current loop antenna are obtained.

[0133] It should be noted that the examples of Figure 10 only illustrate the structural features (such as the L a ) provided in the magnetic current loop antenna to achieve the radiation characteristics of the magnetic current loop antenna. The structure does not constitute a structural limitation on the magnetic current loop antenna itself. For example, in some embodiments, a feed point can be provided at one end of the magnetic current loop antenna to form a direct feed. For example, a feed component can be provided to achieve the provision of the feed point. In the following description of the embodiments of the present application, the provision of the feed point by the feed component can be referred to as the coupling with the feed point. In other embodiments, a feed branch can be provided between the radiation branch of the magnetic current loop antenna and the reference ground to form a coupled feed. In other embodiments, a perfect magnetic conductor (PMC) is provided at the boundary of the antenna (such as a magnetic boundary), and a radiation body of the radiation branch of the magnetic current loop antenna is provided on the other side corresponding to the PMC, thereby obtaining a magnetic current loop antenna in the form of a magnetic current loop dipole antenna.

[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, 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 practice, the operating frequency band of the magnetic flux loop antenna can be adjusted by adjusting the inductance value coupled to ground on the magnetic flux loop antenna and / or the length of the radiator of the magnetic flux loop antenna.

[0136] For example, when the magnetic flux loop antenna is operating at LB, L coupled to ground a The inductance value can be in the range of 5nH to 47nH. When this magnetic flux loop antenna operates in MB mode, the L coupled to ground... a The inductance value can be in the range of 1nH to 33nH. When this magnetic flux loop antenna operates at HB, the L coupled to ground... a The inductance value can be in the range of 0.5nH to 10nH.

[0137] In some embodiments of this application, one or more inductors can be connected in series with the radiator of the magnetic flux loop antenna to make the electric field more uniform during antenna operation, thereby improving antenna radiation efficiency.

[0138] For example, when the magnetic current loop antenna operates in LB, the inductance in series with the radiator can have an inductance value in the range of 5nH to 47nH. When the magnetic current loop antenna operates in MB, the inductance in series with the radiator can have an inductance value in the range of 1nH to 33nH. When the magnetic current loop antenna operates in HB, the inductance in series with the radiator can have an inductance value in the range of 0.5nH to 10nH.

[0139] It can be seen that, in the example provided by the embodiments of the present application, the inductance in series with the radiator and the inductance in parallel with the radiator can have similar value ranges. It should be noted that, in different implementations, if there are multiple inductances in series / parallel with the antenna, the inductance value of each inductance can be in the corresponding range, and the inductance values of different inductances 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 , which is a schematic of one composition of the magnetic current loop slot antenna provided by the embodiments of the present application. In order to achieve the radiation characteristics of the magnetic current loop antenna, the end (or both ends) of the radiation branch of the magnetic current loop slot antenna originally directly coupled to the reference ground can be coupled to the reference ground through one or more newly added inductances L b . Figure 11 The description is given by taking an example of an antenna radiator having one end that 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 the radiator needs to be grounded. For example, one end of the radiator of a left-handed antenna far from the feed point needs to be grounded, and for example, both ends of the radiator of a slot antenna need to be grounded. Therefore, in the area near the ground of the radiator, due to the drop of the potential on the radiator, the electric field with a significantly lower intensity than that in the area near the feed point will appear. That is, the electric field distribution between the radiator and the reference ground is not uniform.

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

[0143] Through the setting of the inductance (such as L b ), the energy storage characteristics of the inductance for magnetic energy make the change of the current on the radiation branch due to the change of the feed signal delayed compared with the change of the voltage, and thus the change of the current on the radiator between the inductance and the feed point is 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 inductance and the feed point. The radiation characteristics of the magnetic current loop antenna are thus obtained.

[0144] It should be noted that, similar to the above Figure 10 The description of the magnetic flux loop antenna in this example is as follows. Figure 11 The structural features shown are only designed to achieve the radiation characteristics of the magnetic flux loop antenna (such as setting L). b This structure does not constitute a structural limitation on the magnetic flux loop antenna itself. For example, in some embodiments, the end of the magnetic flux loop slot antenna furthest from the ground end can be coupled to the feed point to form a direct feed. In other embodiments, a feed stub can be provided between the radiating stub of the magnetic flux loop slot antenna and the reference ground to form a coupled feed. In still other embodiments, a PMC is provided at the antenna boundary (e.g., the magnetic boundary), and the radiating stub radiator of the magnetic flux loop antenna is mirrored on the other side corresponding to the PMC, thereby obtaining a magnetic flux loop slot antenna in the form of a magnetic flux loop slot antenna, etc.

[0145] The magnetohydrodynamic slot antenna provided in this example is also capable of covering at least one of the operating frequency bands of LB, MB, and / or HB.

[0146] In practical implementation, the inductor L connected in series on the radiator of the magnetohydrodynamic ring antenna can be adjusted. b This allows for adjustment of the operating frequency band of the magnetohydrodynamic slot antenna.

[0147] For example, when the magnetic flux ring slot antenna operates at low frequency (LB), the inductor L b The inductance value can be in the range of 5nH to 47nH. When this magnetohydrodynamic slot antenna operates in MB mode, the inductance L... b The inductance value can be in the range of 1nH to 33nH. When the magnetic flux ring slot antenna operates at HB, the inductance L b The inductance value can be in the range of 0.5nH to 10nH.

[0148] As can be seen from the preceding description of the magnetic flux loop antenna, in this example, the inductor L set on the magnetic flux loop slot antenna... b The value range can be related to the inductance L. a The range of values ​​is close.

[0149] In some embodiments of this application, one or more inductors can be connected in series with the radiator of the magnetic flux ring slot antenna to make the electric field more uniform during antenna operation, thereby improving antenna radiation efficiency.

[0150] Exemplarily, when the magnetic current loop slot antenna works at the low frequency, the inductance in series with the radiator can have an inductance value in the range of 5nH to 47nH. When the magnetic current loop slot antenna works at the MB, the inductance in series with the radiator can have an inductance value in the range of 1nH to 33nH. When the magnetic current loop slot antenna works at the HB, the inductance in series with 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 line 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 a signal, the radio frequency module can transmit a radio frequency signal to the feeding module through the radio frequency microstrip line. The feeding module can transmit the radio frequency signal to the antenna radiator (such as the radiating branch of the magnetic current loop antenna) so that the radio frequency signal is converted into an electromagnetic wave 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 direct feeding magnetic current loop antenna in the following examples.

[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 inductance provided on the antenna radiator can be further limited, taking the direct feeding magnetic current loop antenna as an example.

[0154] Exemplarily, for the direct feeding magnetic current loop line antenna, the inductance L a The distance from the feeding point can be included between 1 / 8 wavelength and 1 wavelength of the working wavelength. Correspondingly, for the direct feeding magnetic current loop slot antenna, the inductance L b The distance from the feeding point can also be included between 1 / 8 wavelength and 1 wavelength of the working wavelength.

[0155] In addition, in other embodiments, for the magnetic current loop antenna in the coupling feeding scenario, the inductance also meets the distance range limitation described above, and this part of the description will be described in detail in subsequent examples in combination with specific structures.

[0156] Through the above description of the direct feeding magnetic current loop antenna, it can be seen that the direct feeding magnetic current loop antenna can have the following advantages. Figure 10 In addition, the direct feeding magnetic current loop antenna can also have the following advantages. Figure 11From the examples provided, those skilled in the art should have a comprehensive understanding of the compositional features of the magnetic flux loop antenna provided in the embodiments of this application. The magnetic flux loop antenna provided in the embodiments of this application exhibits different response characteristics to the dielectric loss and magnetic dielectric loss of its implementing material. Based on these different response characteristics, the magnetic flux loop antenna can be adjusted, for example, to optimize its radiation efficiency.

[0157] For example, in combination Figure 12 as well as Figure 13 Explain the impact of dielectric loss on a magnetic flux loop antenna. Specifically, Figure 12 This is a schematic diagram comparing the return loss (S11) with different dielectric losses. Figure 13 This diagram illustrates a comparison of radiation efficiency and system efficiency for antennas with different dielectric losses. Different dielectric losses are indicated by different dielectric loss tangents. In this example, the radiation differences are compared when the antenna material has a dielectric loss tangent of 0.005 and 0.028, all other things being equal. Figure 12 As shown, the smaller the dielectric loss tangent, the lower both the bandwidth and depth of S11 become to some extent. Figure 13 As shown in (a), the smaller the dielectric loss tangent, the higher the radiation efficiency. Similarly, as... Figure 13 As shown in (b), the smaller the dielectric loss tangent, the higher the system efficiency. This indicates that as dielectric loss increases, more energy is lost, which manifests as a wider and deeper resonance at S11, resulting in a decrease in efficiency. Therefore, for magnetic flux loop antennas, using materials with lower dielectric loss can effectively reduce losses and improve antenna radiation performance.

[0158] Combination Figure 14 as well as Figure 15 Explain the impact of magnetic dielectric loss on a magnetic flux loop antenna. Specifically, Figure 14 This is a schematic diagram comparing the return loss (S11) of different magnetic media. Figure 15 This diagram illustrates a comparison of radiation efficiency and system efficiency for antennas with different magnetic dielectric losses. Different magnetic dielectric losses are indicated by different magnetic dielectric loss tangents. In this example, the radiation differences of the antenna are compared when all other conditions are the same, using antenna materials with magnetic dielectric loss tangents of 0.028, 0.05, and 0.08. Figure 14 As shown, the smaller the loss tangent of the magnetic medium, the lower both the bandwidth and depth of S11 become to some extent. Figure 15 As shown in (a), the smaller the loss tangent of the magnetic medium, the higher the radiation efficiency. Similarly, as... Figure 15As shown in (b) of FIG. 6, the smaller the magnetic medium loss tangent is, the higher the system efficiency is. Thus, it is shown that the increase of the magnetic medium loss will cause more energy to be lost, which is reflected on S11 as the resonance becomes wider and deeper, and the corresponding efficiency is reduced.

[0159] In combination with the influence of the dielectric loss on the magnetic current loop antenna given in Figure 12 ( Figure 13 ), and the influence of the magnetic medium loss on the magnetic current loop antenna given in Figure 14 ( 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 as an electric field type antenna, when selecting materials, materials with smaller dielectric loss can be preferentially selected 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 antenna, the magnetic current loop line antenna can include a magnetic current loop monopole antenna and a magnetic current loop dipole antenna. In the magnetic current loop antenna, the magnetic current loop slot antenna can include a magnetic current loop gap antenna and a magnetic current loop left-handed antenna.

[0161] The composition features and radiation conditions of the above four existing magnetic current loop antennas will be described below in combination with the accompanying 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] First, taking the direct feeding mode as an example, the composition and working condition of various magnetic current loop antennas are described.

[0163] Please refer to Figure 17 for a composition schematic diagram of a magnetic current loop monopole antenna provided by the embodiments of the present application.

[0164] As shown in Figure 17 , the magnetic current loop monopole antenna shown in the present example can include a radiation branch, which can be branch 1, B1 for short, as shown in Figure 17 . One end of the B1 can be coupled with 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 inductor L M1The value range of L can refer to the above description of L which is also in parallel inductance a The range of L is not repeated here. In addition, in some embodiments of the present application, the inductance L M1 The distance from the feed point can be between 1 / 8 wavelength and 1 wavelength of the operating wavelength.

[0165] 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 operating frequency band. For example, the length of B1 can be less than 1 / 4 of the wavelength corresponding to the operating frequency band (referred to as the operating wavelength). The wavelength corresponding to the operating frequency band can be the wavelength of the center frequency point of the operating frequency band. It should be noted that, in combination with the foregoing description, the length of B1 is less than 1 / 4 of the operating wavelength in the case of the magnetic current loop antenna operating in the eigenmode (i.e., 1 times frequency). If the magnetic current loop antenna operates 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 operating 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 operating wavelength.

[0166] 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 present example can be arranged in the strong electric field region of the floor corresponding to the operating frequency band, so as to excite the floor to radiate better, thereby obtaining better radiation performance. As an example, Figure 18 shows the arrangement of a magnetic current loop monopole antenna in an electronic device. In this example, the magnetic current loop monopole antenna operates 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 better, thereby obtaining better radiation performance.

[0167] As a possible implementation of a magnetic current loop antenna, the magnetic current loop monopole antenna provided in the present example has the composition shown in Figure 17 The magnetic current loop monopole antenna provided in the present example can generate a uniform electric field near the antenna radiator during operation. For example, Figure 19 shows the electric field simulation diagram of the magnetic current loop monopole antenna provided in the present example in a working scenario. Among them, Figure 19 (a) in FIG. 1 shows the actual simulation results. In order to make the description clearer, Figure 19 (b) in FIG. 1 shows the logical diagram of the electric field distribution. It can be seen that a uniformly distributed electric field can be generated between the radiation branch and the reference ground during the operation of the magnetic current loop monopole antenna. Therefore, the magnetic current loop monopole antenna meets the radiation characteristics of the magnetic current loop antenna.

[0168] The magnetic current loop monopole antenna provided by the embodiment 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.

[0169] For example, the radiation of the magnetic current loop monopole antenna is described below in combination with simulation results of Figure 20 and Figure 21 .

[0170] As shown in Figure 20 , it is an S parameter simulation diagram of the magnetic current loop monopole antenna provided by the embodiment of the present application. As shown in Figure 20 (a), the magnetic current loop monopole antenna in this example can generate a resonance at about 1.8 GHz. The -2 dB bandwidth of the resonance on S11 is at least 100 MHz, and the deepest point reaches -12 dB. As shown in Figure 20 (b), the magnetic current loop monopole antenna provided by the embodiment of the present application has good port matching characteristics on the Smith chart without any matching circuit. Therefore, the magnetic current loop monopole antenna provided by the embodiment of the present application can save the space occupied by the matching circuit during configuration.

[0171] As shown in Figure 21 , it is an efficiency diagram of the magnetic current loop monopole antenna provided by the embodiment of the present application. It can be seen that the radiation efficiency is above -2 dB between 1.4 GHz and 2.5 GHz, and the corresponding system efficiency peak is close to -1 dB, and the -2 dB bandwidth reaches close to 400 MHz. Therefore, the magnetic current loop monopole antenna provided by 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.

[0172] In combination with the above description, those skilled in the art should have an accurate understanding of the magnetic current loop monopole antenna provided by the embodiment of the present application. The scheme provided by the embodiment of the present application is further described below in combination with the current distribution of the magnetic current loop monopole antenna during operation.

[0173] For example, in combination with Figure 22 , it is a current simulation diagram of the magnetic current loop monopole antenna provided by the embodiment of the present application. Among them, Figure 22 (a) is the actual simulation result. In order to facilitate the description, Figure 22 (b) shows the logical distribution of the current corresponding to Figure 22 (a). As shown in Figure 22 , it is shown that the magnetic current loop monopole antenna provided by the embodiment of the present application has a current distribution as shown in Figure 17A magnetic flux loop monopole antenna, even in quarter-wavelength mode, will exhibit reverse current in its radiating stub (or ground plane) during operation. For example, consider the current in the radiating stub in this case. 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 M1 The energy storage characteristics of magnetic energy cause current changes to lag behind voltage changes, resulting in the current near the feed point already reversing (e.g., ...). Figure 22 In the case shown in (b) to the right, closer to inductor L M1 The current still maintains its previous direction (e.g.) Figure 22 (As shown in (b) to the left). This generates a reverse current in the radiator. The generation of this reverse current can effectively adjust the electric field distribution between the radiator and the reference ground, thereby obtaining a more uniform electric field distribution. This is how the radiation characteristics of the magnetic flux loop antenna are obtained.

[0174] In the example above, the inductor L is used. M1 The example described is an inductor L positioned at an end far from the power supply point. In other embodiments of this application, the inductor L... M1 It can also be configured in other locations on the radiating branches. For example, combined with Figure 23 This is a schematic diagram of another type of magnetic flux loop monopole antenna. In this example, the inductor L... M1 It can be configured at the end near the non-feed point. Similar to... Figure 22 Example, in inductor L M1 A reverse current can be formed on the radiator between the inductor and the feed point. For inductor L... M1 Regarding the radiator at the right end, in conjunction with the aforementioned explanation of the magnetic flux loop antenna, the inductance L M1 This can lower the potential at the location of the radiator coupled to the inductor, thereby lowering the potential at the end of the magnetic flux loop antenna. In other words, the current at the antenna end can flow through the inductor L. M1 Returning to the ground (i.e., as) Figure 23 (The current to the left is shown). Therefore, in inductor L... M1 A relatively uniform electric field can then be formed on the right side.

[0175] In combination with the above Figure 22 as well as Figure 23 As can be seen in the example, in the magnetic flux loop monopole antenna provided in this example, its inductance L M1The configuration position is very flexible, with different inductors L M1 The configuration location will not affect the distribution area of ​​the uniform electric field of the magnetic flux loop monopole antenna, that is, it includes at least the area between the radiating stub and the reference ground.

[0176] 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 monopole antenna. For example, refer to... Figure 24 As shown, an inductor L can be connected in series with the radiator of the magnetic flux loop monopole antenna. M2 This results in a more uniform electric field distribution and improves the radiation efficiency of the magnetic flux loop monopole antenna. 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 this application does not impose any limitations on this. For example, the inductor L... M2 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.

[0177] In different specific implementation processes, it has the following characteristics: Figures 17-24 The specific implementation of any of the constituent components of a magnetic flux loop monopole antenna can vary. For example, in some embodiments, the radiating stubs of the magnetic flux loop monopole antenna can fully or partially reuse the metal frame of the electronic device. In other embodiments, the radiating stubs of the magnetic flux loop monopole antenna can also be implemented using flexible printed circuits (FPCs), metalframe die-casting for anodic oxidation (MDA), etc. This application does not limit the specific implementation of the magnetic flux loop monopole antenna.

[0178] The above describes the magnetic flux loop antenna scheme provided in the embodiments of this application, in conjunction with a magnetic flux loop monopole antenna. The following description uses a magnetic flux loop dipole antenna as an example to further illustrate the magnetic flux loop antenna provided in the embodiments of this application.

[0179] It should be understood that existing monopole antennas radiate through a 1 / 4 wavelength radiating structure. In contrast, dipole antennas, based on the mirror principle, radiate through a 1 / 2 wavelength radiating structure.

[0180] In this example, an existing dipole is improved to obtain a corresponding magnetohydrodynamic (MHD) dipole antenna.

[0181] Combination Figure 25 This is a schematic diagram of the composition of a magnetic flux ring dipole antenna provided in an embodiment of this application.

[0182] As shown in Figure 25 , the magnetic current loop-dipole antenna shown in this example can include at least two radiation branches, B2 and B3 as shown in Figure 25 . 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 B2, and the negative pole of the feeding point can be coupled with B3. The other ends of the B2 and B3 away from the feeding point can be grounded through inductance respectively. For example, the end of B2 away from the feeding point can be grounded through inductance L D1 , and correspondingly, the end of B3 away from the feeding point can be grounded through inductance L D2 .

[0183] It should be noted that the value range of the inductance L D1 and the inductance L D2 can refer to the range of the inductance L a which is parallel inductance in the above description, which will not be repeated here. In different embodiments, the position of the inductance 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.

[0184] 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 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 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 B2 and B3 can also be greater than 1 / 4 of the working frequency band. Wherein, the wavelength corresponding to the working frequency band can be the wavelength of the center frequency point of the working frequency band.

[0185] 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 the strong electric field distribution diagram of the floor eigenmode shown in Figure 2 , the magnetic current loop-dipole antenna provided in this example as a kind of 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 26The magnetic current loop dipole antenna is arranged in the electronic device. In this example, the magnetic current loop dipole antenna works in the medium frequency. Therefore, the magnetic current loop dipole antenna is arranged at the top of the electronic device, the medium frequency radiation on the floor can be excited well, and the radiation performance is good.

[0186] As a possible implementation of the magnetic current loop antenna, the magnetic current loop dipole antenna provided in this example has the structure as shown in the figure. Figure 27 The magnetic current loop dipole antenna can generate a uniform electric field near the antenna radiator during operation. For example, Figure 27 The electric field simulation diagram of the magnetic current loop dipole antenna provided in this example in a working scenario is shown. In the figure, Figure 27 (a) shows the simulation result. In order to make the description clearer, Figure 27 (b) shows the logical diagram of the electric field distribution. It can be seen that the magnetic current loop dipole antenna can generate a uniform electric field between the radiation branch and the reference ground during operation. Therefore, the magnetic current loop dipole antenna meets the radiation characteristics of the magnetic current loop antenna.

[0187] The magnetic current loop dipole antenna provided in this example can generate a uniform electric field around the antenna radiator, and has good radiation performance for covering at least one working frequency band.

[0188] For example, the radiation of the magnetic current loop dipole antenna is described below in combination with the simulation results of Figure 28 and Figure 29 .

[0189] As shown in the figure, Figure 28 the S parameter simulation diagram of the magnetic current loop dipole antenna provided in this example is shown. As shown in the figure, Figure 28 (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 at least 100 MHz, and the deepest point reaches -7.5 dB. As shown in the figure, Figure 28 (b), the magnetic current loop dipole antenna provided in this example has good port matching characteristics on the Smith chart without any matching circuit. Therefore, the magnetic current loop dipole antenna provided in this example can save the space occupied by the matching circuit during configuration.

[0190] As shown in the figure, Figure 29As shown in the figure, the efficiency of the magnetic current loop dipole 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 also more than -1dB, and the -2dB bandwidth is more than 400MHz. Therefore, the magnetic current loop dipole 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.

[0191] In combination with the above description, those skilled in the art should have an accurate understanding of the magnetic current loop dipole antenna provided in the embodiment of the present application. The scheme provided in the embodiment 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.

[0192] It should be noted that the above Figures 25-29 The examples are described by taking the magnetic current loop dipole antenna as an example of left-right symmetric configuration. For example, the size and position of B2 and B3 can be left-right symmetrically arranged. For another example, the position of the inductor L D1 and the inductor L D2 may also be left-right symmetrically arranged. In this way, uniform electric field distribution can be obtained between B2 and B3 and the reference ground. In some other embodiments of the present application, the positions of B2 and B3 and the corresponding inductors 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 the inductor 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 the inductor L D1 . Correspondingly, the arrangement of B3 can be different from the left-right symmetric arrangement as shown in Figure 25 . For example, in the present example, B3 can be symmetrically arranged with B2, and the end of B3 can not be grounded through the inductor. In this way, the radiation of the magnetic current loop monopole antenna similar to the foregoing example can be obtained between B2 and the reference ground. B3 can form the radiation of the existing monopole antenna. In some 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 the inductor. 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 some 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.

[0193] In addition, similar to the description of the above magnetic current loop monopole antenna, in the magnetic current loop dipole antenna provided in the present example, the arrangement position of the inductor can also be flexible. Different inductors L S1The configuration location will not affect the distribution area of ​​the uniform electric field of the magnetic flux ring dipole antenna.

[0194] 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 dipole antenna. For example, refer to... Figure 31 As shown, an inductor L can be connected in series with B2. D3 An inductor L can also be connected in series with B3. D4 This results in a more uniform electric field distribution and improves the radiation efficiency of the magnetic flux loop dipole antenna. 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 this application does not impose any limitations on this. For example, the inductor L... D3 Inductor L D4 The range of values ​​for L can be referenced in the above description, which is also a series inductor. b The scope will not be elaborated here.

[0195] In different specific implementation processes, it has the following characteristics: Figures 25-31 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.

[0196] It should be understood that the above Figures 17-31 The compositions of the magnetic flux loop monopole antenna and the magnetic flux loop dipole antenna shown respectively are merely two possible examples of magnetic flux loop line antennas provided in the embodiments of this application. In other implementations provided in the embodiments of this application, the radiation characteristics of the magnetic flux loop antenna can also be obtained based on other existing electric field-shaped line antennas through similar processing (such as setting a grounded inductor on the radiator). The specific implementations are similar and will not be described in detail here.

[0197] The following examples illustrate the specific implementation of the magnetic flux ring slot antenna provided in this application. Examples include a magnetic flux ring slot antenna and a magnetic flux ring left-handed antenna.

[0198] For example, in combination Figure 32 This is a schematic diagram of the composition of a magnetohydrodynamic loop left-handed antenna provided in an embodiment of this application.

[0199] likeFigure 32 As shown, the magnetic current loop left-handed antenna shown in this example can include at least one radiating branch, such as Figure 32 B4 shown. One end of the B4 can be grounded. The other end of the B4 can be coupled with the feed point. In this example, an inductor L C1 may be connected in series on the radiator of the B4 close to the grounded end. It can be understood that, when the inductor L C1 is not provided, the B4 can be directly coupled with the reference ground. When the left-handed feed composition as shown in Figure 32 is provided at the feed point position, a conventional left-handed antenna can be formed. In this example, the left-handed feed composition can include a feed point, and a capacitor C1 (referred to as left-handed capacitor) connected in series with the feed point. The left-handed capacitor can be provided to excite the B4 to generate a corresponding left-handed mode for radiation. For example, by providing the left-handed capacitor, a non-reversed current can be formed on the radiating branch 4, and the corresponding resonance can achieve coverage of the operating frequency band (such as low frequency) in a smaller space.

[0200] It should be noted that, in the example as shown in Figure 32 , the inductor L C1 is provided on the B4, so that the radiator of the B4 between the inductor L C1 and the feed point can form a uniform electric field distribution with the reference ground. In different embodiments, the position of the inductor L C1 may be flexible. For example, the inductor L C1 may have a range of values as described above for the inductor L b in series. Here, no further description is given. In addition, in some embodiments of the present application, the distance between the inductor L C1 and the feed point can be between 1 / 8 wavelength and 1 wavelength of the operating wavelength.

[0201] The magnetic current loop left-handed antenna provided in the embodiments of the present application can be provided 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 left-handed antenna provided in this example, as a kind of electric field type antenna, can be provided in the strong electric field region of the floor corresponding to the operating frequency band, so as to excite the floor to radiate better, thereby making the magnetic current loop left-handed antenna obtain better radiation performance. As an example, Figure 33 a magnetic current loop left-handed antenna provided in an electronic device is shown. In this example, the magnetic current loop left-handed antenna works in the intermediate frequency. Therefore, by providing the magnetic current loop left-handed 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.

[0202] It should be understood that in the present example, inductance L is arranged near the grounding position of the magnetic current loop left-handed antenna C1 The ground. In combination with the analysis of the working characteristics of the aforementioned magnetic current loop slot antenna, this structure can make the inductance L C1 Between the feed point, that is, B4 and the reference ground, a relatively uniform electric field distribution is formed, thereby obtaining the radiation characteristics of the magnetic current loop slot antenna in this part.

[0203] As a possible implementation of a magnetic current loop antenna, Figure 34 The magnetic current loop left-handed antenna provided by the present example is shown in an electric field simulation diagram under a working scenario. Among them, Figure 34 (a) in FIG. 1 shows a schematic diagram of the actual simulation result. In order to make the description more clear, Figure 34 (b) in FIG. 1 shows a logical diagram of the electric field distribution. It can be seen that when the magnetic current loop left-handed antenna works, a uniformly distributed electric field can be generated between the radiation branch and the reference ground. Therefore, the magnetic current loop left-handed antenna meets the radiation characteristics of the magnetic current loop antenna.

[0204] The magnetic current loop left-handed antenna provided by 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.

[0205] For example, the following will be described in combination with the simulation results of Figure 35 and Figure 36 The radiation of the magnetic current loop left-handed antenna is described.

[0206] As shown in Figure 35 , the S parameter simulation diagram of the magnetic current loop left-handed antenna provided by the present application is shown. As shown in Figure 35 (a), the magnetic current loop left-handed 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 -8dB. As shown in Figure 35 (b), without any matching circuit, the magnetic current loop left-handed antenna provided by the present application has good port matching characteristics on the Smith circle diagram. Therefore, the magnetic current loop left-handed antenna provided by the present application can save the space occupied by the matching circuit during configuration.

[0207] As shown in Figure 36The 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.

[0208] 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 This results in a more uniform electric field distribution and improves the radiation efficiency of the left-handed magnetic flux loop antenna. 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; this application does not impose any limitations on this. For example, the inductor L... C2 The range of values ​​for L can be referenced in the above description, which is also a series inductor. b The scope will not be elaborated here.

[0209] In different specific implementation processes, it has the following characteristics: Figures 32-37 The specific implementation of any of the constituent components of the magnetic flux loop left-handed antenna can vary. For example, in some embodiments, the radiating stubs of the magnetic flux loop left-handed antenna can fully or partially reuse the metal frame of the electronic device. In other embodiments, the radiating stubs of the magnetic flux loop left-handed antenna can also be implemented using flexible printed circuits (FPCs), metalframe diecasting for anodization (MDA), etc. This application does not limit the specific implementation of the magnetic flux loop left-handed antenna.

[0210] Please refer to Figure 38 This is a schematic diagram of the composition of a magnetorheological loop slot antenna provided in an embodiment of this application.

[0211] It should be understood that, based on the principle of mirroring, combined with Figure 32 The magnetic flux loop left-handed antenna shown can be mirrored by placing a PMC on its left side, thus obtaining the structural composition of the magnetic flux loop slot antenna provided in this example. The feed point of this magnetic flux loop slot antenna can be set at the center of the PMC. The following... Figure 38 The example illustrates the composition and operation of a magnetic flux loop slot antenna.

[0212] like Figure 38As shown, the magnetic current loop slot antenna shown in this example can include at least two radiating branches, such as B5 and B6. The opposite ends of the B5 and B6 can be coupled to the feed point respectively. For example, the positive pole of the feed point can be coupled to the B5, and the negative pole of the feed point can be coupled to the B6. Figure 2 As shown, the magnetic current loop slot antenna shown in this example can include at least two radiating branches, such as B5 and B6. The opposite ends of the B5 and B6 can be coupled to the feed point respectively. For example, the positive pole of the feed point can be coupled to the B5, and the negative pole of the feed point can be coupled to the B6.

[0213] 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.

[0214] It can be understood that when no series inductor is provided, the B5 and B6 and the reference ground can form a slot, so as to form the existing slot antenna radiation under the excitation of the feed point. In this example, by providing the inductors on the B5 and B6 respectively, a uniform electric field can be formed between the radiators of the B5 and B6 and the reference ground between the two inductors, so as to obtain the radiation characteristics of the magnetic current loop slot antenna.

[0215] It can be understood that based on the foregoing description of the mirror image principle, a corresponding uniform electric field distribution can be obtained between the feed point and the inductor L S1 due to the energy storage characteristics of the inductor L S1 to magnetic energy. Correspondingly, a corresponding uniform electric field distribution can also be obtained between the feed point and the inductor L S2 due to the energy storage characteristics of the inductor L S2 to magnetic energy. Therefore, the superposition of the above two scenarios can obtain the uniform electric field distribution between the inductor L S1 and the inductor L S2 between the radiators of the B5 and B6 and the reference ground.

[0216] It should be noted that the value range of the inductor L S1 and the inductor L S2 may refer to the range of the inductor L b which is also a series inductor in the foregoing description, which will not be described here again. In different embodiments, the positions of the inductor L S1 and / or the inductor L S2 may be flexible. In addition, in some embodiments of the present application, the distance between the inductor L S1 and the feed point can be between 1 / 8 wavelength and 1 wavelength of the working wavelength. Similarly, in other embodiments of the present application, the distance between the inductor L S2 and the feed point can also be between 1 / 8 wavelength and 1 wavelength of the working wavelength.

[0217] 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 of the floor eigenmode shown in Figure 39 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 of the floor eigenmode shown in Figure 40 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 of the floor eigenmode shown in

[0218] It should be understood that, in the embodiments of the present application, inductors are arranged near the ground positions (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 magnetic current loop slot antenna, the structure can form a relatively uniform electric field distribution between the inductors and the feed points. In combination with the electric field distribution on both sides of the PMC, the radiation characteristics of the magnetic current loop slot antenna between the B5 and B6 and the reference ground can be obtained.

[0219] As a possible implementation of the magnetic current loop antenna, Figure 40 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 of the floor eigenmode shown in Figure 40 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 of the floor eigenmode shown in Figure 41 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 of the floor eigenmode shown in

[0220] 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 of the floor eigenmode shown in

[0221] 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 .

[0222] As shown in Figure 41 , the S parameter simulation of the magnetic current loop slot antenna provided in the embodiments of the present application is shown. As shown in Figure 41As shown in (a) of the diagram, the magnetohydrodynamic loop slot antenna in this example can generate a resonance at approximately 1.8 GHz. This resonance has a -2 dB bandwidth on S11 approaching 100 MHz, with a maximum depth approaching -11 dB. As... Figure 42 As shown in (b) of the diagram, the 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 magnetic flux loop slot antenna provided in this embodiment to save space occupied by matching circuitry during configuration.

[0223] like Figures 38-42 The diagram shown illustrates the efficiency of the 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 -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 slot antenna provided in this embodiment can cover at least one operating frequency band, thereby effectively supporting the wireless communication functions of electronic devices.

[0224] It should be noted that the above Figure 43 In the examples, the magnetic flux loop slot antennas are all illustrated using a left-right symmetrical configuration. For instance, the dimensions and positions of B5 and B6 can be set symmetrically. Another example is the inductor L... S1 and inductor L S2 The positions of B5 and B6 can also be symmetrically arranged. This allows for a uniform electric field distribution between B5, B6, and the reference ground. In other embodiments of this application, the positions of B5, B6, and the corresponding inductors can also be asymmetrical. For example, combined with... Figure 43 Examples, such as Figure 38 As shown in (a) above, the positions of B5 and B6 and the inductor settings can be the same as described above. Figure 38 Similar. However, the inductor settings can differ from those shown. Figure 43 The example shown.

[0225] For example, in Figure 43 In example (a), an inductor L can be connected in series with B5. S1 Thus, the value obtained in inductor L S1 A uniform electric field distribution is achieved between B5 and the feed point, and between B5 and the reference ground. Correspondingly, an inductor can be omitted on B6. This allows for the acquisition of the existing electric field distribution of a slot antenna between B6 and the reference ground. For example, in... Figure 44 In example (b), an inductor L can be connected in series with B6. S2 Thus, the value obtained in inductor L S2With the feed point, the uniform electric field distribution between B6 and the reference ground. While the corresponding, B5 can not be in series inductance. Thus enabling the existing gap antenna B5 and the reference ground between the electric field distribution. Of course, in other embodiments of the application, B5 and B6 body can also be asymmetrically arranged. For example, the length and / or position of B5 can be different from B6.

[0226] It should be noted that in other embodiments of the application, also can be by in series at least one inductance on the magnetic current loop gap antenna radiator. For example, referring to Figures 38-44 It can be shown that the inductance L S3 , so that the electric field distribution is more uniform, improve the radiation efficiency of the magnetic current loop gap antenna. Of course, in other embodiments, can also be in series on B6 more inductance, such as in series inductance L S4 , thus further improve the radiation efficiency. In different implementations of the application, for the inductance position on the radiator in series, and the number of inductance settings, can be selected according to the actual need, the embodiment of the application does not limit. Exemplary, the inductance L S3 The inductance L S4 The value range can refer to the above description of the same in series inductance L b The range, not here.

[0227] In different specific implementation process, with the composition of the magnetic current loop gap antenna as Figures 32-44 In some embodiments, the magnetic current loop gap antenna radiation branch can be all or part of the metal frame of the electronic device. In other embodiments, the magnetic current loop gap antenna radiation branch can also be realized by flexible circuit board (Flexible Printed Circuit, FPC), anodized die casting process (Metal frame Diecasting for Anodicoxidation, MDA) and other forms. The embodiment of the application does not limit the specific implementation form of the magnetic current loop gap antenna.

[0228] It should be understood that the above Figure 10 The composition of the magnetic current loop left-handed antenna and the magnetic current loop gap antenna respectively shown, only two possible examples of the magnetic current loop slot antenna provided by the embodiment of the application. Other implementations provided by the embodiment of the application can also be based on other existing electric field type slot antenna, through similar processing (such as in series inductance on the radiator), to obtain the radiation characteristics of the magnetic current loop antenna. The specific implementation is similar, not here.

[0229] It should be noted that the magnetic current loop antenna provided in the above examples is fed in the form of direct feed.

[0230] In some other embodiments of the present application, the above-mentioned magneto-dynamic loop antennas, such as the magneto-dynamic loop wire antenna as shown in Figure 11 , and / or the magneto-dynamic loop slot antenna as shown in Figure 45 , and various specific examples thereof, can also be excited by coupling feeding.

[0231] It can be understood that the direct feeding excitation mode requires the feeding point to be set at a relatively fixed position, and meanwhile, a structure space needs to be reserved for the feeding component near the feeding point. Correspondingly, in the coupling feeding mode provided by the embodiments of the present application, since the feeding is performed to the radiating branch by electromagnetic coupling, the feeding component is not needed. In addition, since the feeding branch is set more flexibly, it is more conducive to the implementation of the magneto-dynamic loop antenna provided by the embodiments of the present application.

[0232] The magneto-dynamic loop antenna based on coupling feeding provided by the embodiments of the present application is exemplified below in combination with the accompanying drawings. It should be noted that in the following examples, the radiator body of the magneto-dynamic loop antenna is similar to the examples in the foregoing description, and the difference is only that in the foregoing description, the position of the feeding point can be replaced by setting an inductor. In the following examples, the mechanism of coupling feeding will be mainly described in detail in combination with the four antenna scheme examples in the foregoing examples, such as the magneto-dynamic loop monopole antenna, the magneto-dynamic loop dipole antenna, the magneto-dynamic loop left-handed antenna, and the magneto-dynamic loop slot antenna.

[0233] Exemplarily, six possible compositions of the feeding branch for feeding in the magneto-dynamic loop antenna system based on coupling feeding provided by the embodiments of the present application are shown in Figure 45 In the example of (a) in Figure 45 , the feeding branch can include a radiator, such as CB1 as shown in (a) in Figure 45 . The two ends of the CB1 are suspended, and a feeding point can be arranged on the CB1. Exemplarily, one end (such as the positive electrode) of the feeding point can be coupled with the CB1, and the other end (such as the negative electrode) of the feeding point can be coupled with the radio frequency signal line arranged on the reference ground. It should be noted that in different implementations, the coupling position of the feeding point and the CB1 can be different. For example, in the example as shown in (a) in Figure 45 , the feeding point can be coupled with the CB1 at the center position of the CB1. In some other implementations of the present example, the coupling position of the feeding point and the CB1 can also be other positions on the CB1, such as the left part of the CB1, or the right part of the CB1, and the like.

[0235] Please refer to (b) in Figure 45 for another composition of the feeding branch for coupling feeding provided by the embodiments of the present application. In the example as shown in (b) in Figure 45 , the feeding branch can include a feeding branch and a radiator. The feeding branch can be a CB2, and the radiator can be a CB1. The CB2 can be arranged on the CB1.Figure 45 In the example of (b) in FIG. 8, the feeding branch can include a radiator CB2. A feeding point can be arranged 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. 8, the feeding branch can include a radiator CB2. A feeding point can be arranged 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 The position of the feeding point as shown in (b) in FIG. 8 is only an example. Similarly to the example of (a) in FIG. 8, the feeding point can be arranged at other positions on the CB2. Figure 45 Similarly to the example of (a) in FIG. 8, the feeding point can be arranged at other positions on the CB2.

[0236] Please refer to (c) in FIG. 9 for another example of the feeding branch for coupling feeding provided by embodiments of the present application. As shown in (c) in FIG. 9, 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 arranged in suspension. Figure 45 Figure 45 Please refer to (c) in FIG. 9 for another example of the feeding branch for coupling feeding provided by embodiments of the present application. As shown in (c) in FIG. 9, 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 arranged in suspension.

[0237] Please refer to (d) in FIG. 10 for another example of the feeding branch for coupling feeding provided by embodiments of the present application. The composition of the feeding branch in this example can be improved from the composition shown in (c) in FIG. 9. As an example, as shown in (d) in FIG. 10, 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. 10 for another example of the feeding branch for coupling feeding provided by embodiments of the present application. The composition of the feeding branch in this example can be improved from the composition shown in (c) in FIG. 9. As an example, as shown in (d) in FIG. 10, 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. 10 for another example of the feeding branch for coupling feeding provided by embodiments of the present application. The composition of the feeding branch in this example can be improved from the composition shown in (c) in FIG. 9. As an example, as shown in (d) in FIG. 10, 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.

[0238] Please refer to (e) in FIG. 11 for another example of the feeding branch for coupling feeding provided by embodiments of the present application. The composition of the feeding branch in this example can be improved from the composition shown in (c) in FIG. 9. As an example, as shown in (e) in FIG. 11, 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. 11 for another example of the feeding branch for coupling feeding provided by embodiments of the present application. The composition of the feeding branch in this example can be improved from the composition shown in (c) in FIG. 9. As an example, as shown in (e) in FIG. 11, 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.

[0239] Please refer to Figure 45 (f) in the diagram illustrates another configuration of a 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.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] 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.

[0245] 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 value range can be referenced from the above description of L, which is also a parallel inductor. a The range.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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) of shows a simulation result. In order to make the description clearer, Figure 48 (b) of 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.

[0251] 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.

[0252] 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 .

[0253] 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 this example, the magnetic current loop monopole antenna 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.

[0254] 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.

[0255] 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 diagram shows the logic distribution of the current corresponding to (a) in the diagram. 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.

[0256] 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.

[0257] The above conclusions will be verified using a coupled-fed magnetic flux loop monopole antenna as an example.

[0258] 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.

[0259] The influence of the feeding 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 center left by 4.5 mm, 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 shown in (c), it can be seen that under different positions of CB1, such as CB1 in the center and CB1 in the center left by 4.5 mm, the radiation efficiency also does not change significantly.

[0260] Thus, the conclusion mentioned in the above description that the length of the feeding branch can be used for port matching and the position of the feeding branch can be flexibly set can be proved. The conclusion is also applicable to other coupled feeding magnetic current loop antennas. The subsequent description will not be repeated.

[0261] It should be noted that in some other embodiments of the present application, based on the composition of the coupled feeding magnetic current loop monopole shown in Figure 56 , more inductors in series can be arranged on the radiator B1 to achieve the design of enhancing the radiation efficiency. For example, in the example 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 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.

[0262] 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, and details are not described herein.

[0263] 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 die casting for anodicoxidation (MDA), or the like. The embodiments of this application do not limit the implementation form of the magnetic current loop monopole antenna.

[0264] 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 of the magnetic current loop dipole antenna.

[0265] 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.

[0266] In this example, the existing dipole antenna is improved to obtain the corresponding coupling-fed magnetic current loop dipole antenna.

[0267] In combination with Figure 25 , a composition schematic 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 refer to the range of the parallel inductance in the above description.a The details are not repeated here.

[0268] 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 may be controlled to be between 1 / 8 wavelength and 1 wavelength of the operating wavelength, so as to obtain a magnetic current loop radiation with uniform electric field characteristics. Similarly, in another implementation of the present example, the distance between the inductor L CD2 and the gap (i.e., the inductor L CD2 may be controlled to be between 1 / 8 wavelength and 1 wavelength of the operating wavelength, so as to obtain a magnetic current loop radiation with uniform electric field characteristics.

[0269] 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.

[0270] In some embodiments, when the magnetic current loop dipole antenna with coupled feed is arranged in an electronic device, the configuration position and the method example are similar to those of the direct feed scheme shown in Figure 57 , and the details are not repeated here.

[0271] As a possible implementation of a magnetic current loop antenna, the magnetic current loop dipole antenna provided in the present example and composed as shown in Figure 58 can generate a uniform electric field near 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 FIG. 1 shows a diagram of the actual simulation result. In order to make the description clearer, Figure 59 (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 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.

[0272] 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.

[0273] 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.

[0274] 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 circle 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.

[0275] 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.

[0276] 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, so that the electric field distribution is 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 inductor quantity 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.

[0277] 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.

[0278] 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.

[0279] 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.

[0280] In this example, an existing left-handed pole is improved to obtain a corresponding coupled-fed magnetohydrodynamic loop left-handed antenna.

[0281] 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.

[0282] 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.

[0283] In different embodiments, the position of the inductor L CC1 may be flexible. In addition, the exemplary 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.

[0284] 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.

[0285] 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.

[0286] 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.

[0287] 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.

[0288] 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 .

[0289] 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.

[0290] 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.

[0291] It should be noted that in some other embodiments of this application, based on such Figure 66 The composition of the left-hand side of the coupled-fed magnetic flux loop shown can also be further enhanced by connecting more inductors in series with the radiator B4, thereby improving radiation efficiency. 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.

[0292] 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 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.

[0293] 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 die casting 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.

[0294] 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.

[0295] It should be understood that, based on the mirror principle, in combination with Figure 62 the magnetic current loop left-handed antenna, the structure composition of the magnetic current loop slot antenna provided by the present example can be obtained in the case that the PMC is arranged on the left side of the magnetic current loop left-handed antenna. 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 .

[0296] 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.

[0297] 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 B5, and an inductor L CS2 can be connected in series on the B6.

[0298] 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.

[0299] It should be noted that, in combination with the distance between the inductor and the feed point in the foregoing 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.

[0300] In some embodiments, when the magnetic current loop slot antenna with coupled feed is arranged in an electronic device, the configuration position and method examples are similar to those of the direct feed scheme shown in Figure 38 The direct feed scheme is not described herein again.

[0301] As a possible implementation of the magnetic current loop antenna, the magnetic current loop slot antenna with the composition shown in Figure 67 can generate uniform electric field near the antenna radiator during operation. For example, Figure 68 shows the electric field simulation diagram of the magnetic current loop slot antenna provided by the present example in a working scenario. Among them, Figure 68 (a) in FIG. 1 shows the simulation results. In order to make the description more clear, Figure 68 (b) in FIG. 1 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, reference ground and CB1. Therefore, the magnetic current loop slot antenna meets the radiation characteristics of the magnetic current loop antenna.

[0302] The magnetic current loop slot antenna with coupled feed provided by the embodiments of the present application can generate uniform electric field around the antenna radiator, and also has good radiation performance for covering at least one working frequency band.

[0303] For example, the radiation of the magnetic current loop slot antenna with coupled feed is described below in combination with the simulation results of Figure 69 and Figure 70 .

[0304] As shown in Figure 69 , it is an S parameter simulation diagram of the magnetic current loop slot antenna with coupled feed provided by the embodiments of the present application. As shown in Figure 69 (a), the magnetic current loop slot antenna in the present example can produce a resonance at about 2GHz. The -2dB bandwidth of the resonance on S11 is close to 200MHz, and the deepest point is more than -10dB. As shown in Figure 69As shown in (b) of this application, 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.

[0305] 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.

[0306] 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.

[0307] 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... 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.

[0308] 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.

[0309] 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, modified, and / or extended in various ways without departing from the spirit and scope of the present application. Accordingly, it is intended that the specification and drawings be considered as illustrative only, with the true scope of the present application being indicated by the following claims.

Claims

1. A terminal slot antenna, characterized in that, the antenna comprises a radiation branch, the radiation branch comprises a first radiator and a second radiator, a first end of the first radiator is electrically connected with a reference ground, and a first end of the second radiator is electrically connected with the reference ground; a first inductor is connected in series on the first radiator and / or a second inductor is connected in series on the second radiator; when the terminal slot antenna is directly fed at a feed point, a second end of the first radiator is electrically connected with a second end of the second radiator through the feed point; when the terminal slot antenna is coupled fed, the second end of the first radiator and the second end of the second radiator are suspended; the terminal slot 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 the radiation branch; a distance between the first inductor and the feed point is 1 / 8 to 1 times of a working wavelength; and a distance between the second inductor and the feed point is 1 / 8 to 1 times of the working wavelength; electric fields between the first and second radiators and the reference ground are uniformly distributed. 2.The terminal slot antenna according to claim 1, characterized in that, when a working frequency band of the antenna is 450 MHz-1 GHz, an inductance of the first inductor and the second inductor is set to be within [5 nH, 47 nH]; when the working frequency band of the antenna is 1 GHz-3 GHz, the inductance of the first inductor and the second inductor is set to be within [1 nH, 33 nH]; when the working frequency band of the antenna is 3 GHz-10 GHz, the inductance of the first inductor and the second inductor is set to be within [0.5 nH, 10 nH].

3. The terminal slot antenna according to claim 1 or 2, characterized in that, the feed branch comprises a first feed part, the feed point is connected at a center of the first feed part, and both ends of the first feed part are suspended; 4. The terminal slot antenna according to claim 1 or 2, characterized by the feed branch comprises a second feed part, both sides of the second feed part are grounded through inductors respectively, and the feed point is connected in series on the second feed part; 5. The terminal slot antenna according to claim 1 or 2, characterized by the feed branch comprises a third feed part, the feed point is connected at one end of the third feed part; 6. The terminal slot antenna according to claim 5, characterized in that the other end of the third feed part is suspended; 7. The terminal slot antenna according to claim 5, wherein the other end of the third feed part is grounded through a third inductor; 8. The terminal slot antenna according to claim 5, wherein an end of the third feed part away from the feed point is grounded, and a slot is arranged on the third feed part, which divides the third feed part into two parts that are not connected with each other; 9. The terminal slot antenna according to claim 5, wherein, an end of the third feed part away from the feed point is grounded, and a fourth inductor is connected in series on the third feed part.

10. The terminal slot antenna according to any one of claims 1-9, characterized by different sizes of the feed branch correspond to different port impedances of the terminal slot antenna. 11.The terminal slot antenna according to any one of claims 1-10, characterized in that, when the terminal slot antenna works, uniform electric fields are distributed between the radiation branch and the reference ground.

12. The terminal slot antenna according to any one of claims 1-11, characterized in that, when the terminal slot antenna is in operation, the first radiating body and the second radiating body are respectively provided with reverse currents; 13. The terminal slot antenna according to any one of claims 1-12, characterized by the first radiating body is provided with one or more inductors in series; and / or, the second radiating body is provided with one or more inductors in series; when the radiating body is provided with multiple inductors in series, at least two of the multiple inductors are arranged apart from the radiating body.

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

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