Rectifying antenna module and electronic equipment

Abstract

The invention discloses a rectification antenna module and electronic equipment, and belongs to the technical field of communication. The rectification antenna module comprises N first antenna units, M second antenna units, a feed module and a rectification module. The M second antenna units are arranged at intervals and distributed in an array, M is an integer greater than or equal to 4, the N first antenna units are arranged at intervals and surround the M second antenna units, and N is an integer greater than or equal to 4; the feed module comprises a first feed port and a second feed port, and the first feed port is electrically connected with the N first antenna units and used for providing excitation signals with equal amplitude and equal phase intervals for the first antenna units arranged in sequence in the N first antenna units; the second feed port is electrically connected with the M second antenna units and is used for providing excitation signals with equal amplitude and equal phase to the M second antenna units; the rectification module is electrically connected with the M second antenna units.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a rectifying antenna module and an electronic device. Background Art

[0002] Rectennas have the ability to capture electromagnetic waves, convert AC to DC, and perform wireless communication in far-field wireless power transmission. However, rectennas in related technologies cannot simultaneously receive beam information and collect energy. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a rectifying antenna module and an electronic device. By setting up two array antennas, one array antenna can be used to receive beam information and the other array antenna can be used to collect microwave energy, so that the rectifying antenna module can simultaneously receive beam information and collect energy.

[0004] In a first aspect, an embodiment of the present application provides a rectifying antenna module, the rectifying antenna module comprising: N first antenna units, M second antenna units, a feeding module and a rectifying module;

[0005] The M second antenna units are spaced apart from each other and distributed in an array, and M is an integer greater than or equal to 4;

[0006] The N first antenna units are arranged at intervals from each other and surround the M second antenna units, where N is an integer greater than or equal to 4;

[0007] The feeding module includes a first feeding port and a second feeding port, the first feeding port is electrically connected to the N first antenna units, and is used to provide excitation signals with equal amplitude and equal phase intervals to the first antenna units arranged in sequence among the N first antenna units; the second feeding port is electrically connected to the M second antenna units, and is used to provide excitation signals with equal amplitude and equal phase intervals to the M second antenna units;

[0008] The rectifier module is electrically connected to the M second antenna units.

[0009] In a second aspect, an embodiment of the present application provides an electronic device, which includes the rectenna module as described in the first aspect.

[0010] In an embodiment of the present application, the rectifying antenna module includes: two array antennas, wherein the first array antenna is composed of N first antenna units, the second array antenna is composed of M second antenna units, the first array antenna is surrounded by the second array antenna, and the feeding module is used to provide excitation signals with equal amplitude and equal phase intervals to the first antenna units arranged in sequence in the first array antenna through the first feeding port, and to provide excitation signals with equal amplitude and equal phase to each second antenna unit in the second array antenna through the second feeding port. At this time, the first array antenna can be used to realize beam information reception, and the second array antenna is electrically connected to the rectifying module, so that the second array antenna can generate alternating current under the action of microwave energy, and the alternating current is converted into direct current through the rectifying module, thereby realizing the collection of microwave energy, so that the rectifying antenna module can simultaneously perform beam information reception and energy collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a rectenna module provided in an embodiment of the present application;

[0012] Figure 2 It is a schematic diagram of the disassembled structure of a rectenna module provided in an embodiment of the present application;

[0013] Figure 3 is a cross-sectional view of a rectenna module provided in an embodiment of the present application;

[0014] Figure 4 It is one of the structural schematic diagrams of N first antenna units, M second antenna units, a power divider module and a rectifier module in an embodiment of the present application;

[0015] Figure 5 yes Figure 4 A partial enlarged view of the middle A area;

[0016] Figure 6 is a structural schematic diagram of a feeding module in an embodiment of the present application;

[0017] Figure 7 is a curve diagram of the reflection coefficient of the rectenna module provided in the embodiment of the present application;

[0018] Figure 8 This is the second structural schematic diagram of N first antenna units, M second antenna units, a power divider module and a rectifier module in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0020] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0021] The following is a detailed description of the rectenna module and electronic device provided in the embodiments of the present application through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0022] See also Figure 1 , the rectifier antenna module provided in the embodiment of the present application includes: N first antenna units 10, M second antenna units 20, a feeding module 30 and a rectifier module 40;

[0023] M second antenna units 20 are spaced apart from each other and distributed in an array, where M is an integer greater than or equal to 4;

[0024] N first antenna units 10 are arranged at intervals from each other and surround the M second antenna units 20, where N is an integer greater than or equal to 4;

[0025] The feeding module 30 includes a first feeding port 31 and a second feeding port 32. The first feeding port 31 is electrically connected to the N first antenna units 10, and is used to provide excitation signals with equal amplitude and equal phase intervals to the first antenna units 10 arranged in sequence among the N first antenna units 10; the second feeding port 32 is electrically connected to the M second antenna units 20, and is used to provide excitation signals with equal amplitude and equal phase intervals to the M second antenna units 20;

[0026] The rectifier module 40 is electrically connected to the M second antenna units 20 .

[0027] It should be noted that N first antenna units 10 constitute a first array antenna 100, the amplitudes of the excitation signals of the first antenna units 10 in the first array antenna 100 are equal, and the N first antenna units 10 are arranged in a clockwise or counterclockwise order. At this time, the phases of the excitation signals of the N first antenna units 10 are successively increased or decreased at equal intervals in the clockwise or counterclockwise order, so that the first antenna units arranged in sequence among the N first antenna units have excitation signals with equal amplitudes and equal phase intervals.

[0028] In this way, the first array antenna 100 is a ring structure surrounding the M second antenna units 20, and the phases of the excitation signals of the N first antenna units 10 are arranged at equal intervals according to the arrangement order of the first antenna units 10, so as to form a vortex electromagnetic wave perpendicular to the plane where the first array antenna 100 is located, which is used to receive the corresponding information beam.

[0029] In addition, M second antenna units 20 constitute a second array antenna 200, and the excitation signal amplitude and phase of each second antenna unit 20 in the second array antenna 200 are equal, so that microwave energy can be collected in parallel by the M second antenna units, and the microwave energy collected by the M second antenna units is converted into direct current through a rectifier module electrically connected to the second array antenna 200.

[0030] It is worth mentioning that by surrounding the first array antenna 100 outside the second array antenna 200, the second array antenna 200 surrounded by the first array antenna 100 can be more concentrated, thereby improving the energy collection efficiency of the second array antenna 200; in addition, the first array antenna 100 surrounded by the second array antenna 200 can provide a larger layout space for the first array antenna 100, so that the coverage area of ​​the first array antenna 100 is wider, thereby improving the antenna performance of the first array antenna 100.

[0031] It is worth noting that in the related art, a dipole antenna and a rectifying circuit are used to form a rectifying antenna. This solution has the defect of low antenna energy conversion efficiency. For example, when the input radio frequency is 5.6 GHz, the maximum rectifying efficiency of the rectifying antenna is less than 50%.

[0032] In the embodiment of the present application, the microwave energy is collected by the second array antenna 200 composed of M second antenna units 20, which can improve the antenna energy conversion efficiency. For example: when the input frequency is 5.8GHz, the maximum rectification efficiency of the rectifying antenna can reach 80.3%. In addition, the first array antenna 100 is arranged on the periphery of the second array antenna 200, and the first antenna units 10 arranged in sequence in the first array antenna 100 are provided with excitation signals with equal amplitudes and equal phase intervals through the first feeding port 31 of the feeding module 30, so that the first array antenna 100 can be used for receiving beam information, that is, the rectifying antenna module of the embodiment of the present application can simultaneously realize the reception of communication signals and the collection of microwave energy.

[0033] In some embodiments, the number of first feeding ports 31 is at least N, so that different first antenna units 10 can be electrically connected to different first feeding ports 31 to obtain excitation signals with equal amplitudes and equal phase spacing between adjacent first antenna units 10.

[0034] For example, assuming that N is equal to 4 and the phase interval between adjacent first antenna units 10 is 90°, the phases of four first antenna units 10 arranged in sequence may be 0°, 90°, 180°, and 270°.

[0035] In some embodiments, the number of the second feeding ports 32 is one or at least two. In this case, different second antenna units 20 can be electrically connected to the same or different second feeding ports 32 .

[0036] For the sake of convenience of explanation, in the embodiment of the present application, an example is given in which the number of the first feeding ports 31 is N and the number of the second feeding ports 32 is 1, which is not specifically limited herein.

[0037] In some embodiments, M is an integer greater than or equal to 4, and N is an integer greater than or equal to 4, and M can be any integer greater than or equal to 4, such as 4, 6, 9, etc., and N can be any integer greater than or equal to 4, such as 4, 5, 6, etc. For ease of explanation, in the example Figures 1 to 6 In the embodiment shown, M is equal to 4 and N is equal to 8 as an example for illustration. Figure 8 In the illustrated embodiment, M is equal to 16 and N is equal to 12. The values ​​of M and N are not specifically limited.

[0038] In some embodiments, the number of the rectifier modules 40 may be one or at least two.

[0039] In the case where there is one rectifier module 40 , the AC energy collected by the M second antenna units 20 can be gathered into the same rectifier module 40 , so that the AC energy collected by the M second antenna units 20 can be converted into DC energy using the same rectifier module 40 .

[0040] For example: Figure 4 As shown, the rectenna module provided in the embodiment of the present application further includes: a power divider module 50 , and the second feeding port 32 is electrically connected to the M second antenna units 20 through the power divider module 50 .

[0041] At this time, the rectifier module 40 may be electrically connected to the power divider module 50 , so that the microwave energy collected by the M second antenna units 20 is gathered through the power divider module 50 and then input into the same rectifier module 40 .

[0042] In this embodiment, the same second feeding port 32 distributes excitation signals of equal amplitude and consistent phase to M second antenna units 20 through the power divider module 50, and the microwave energy collected by the M second antenna units 20 can also be transmitted to the same rectifier module 40 through the power divider module 50. Compared with the implementation method of setting a respective second feeding port 32 and rectifier module 40 for each second antenna unit 20, the structure of the rectifier antenna module can be simplified.

[0043] Of course, the rectifier module 40 can also be set to at least two, for example: the number of rectifier modules 40 is M, so that the M second antenna units 20 correspond one-to-one to the M rectifier modules 40, so that one rectifier module 40 is used to convert the AC energy collected by the corresponding second antenna unit 20 into DC energy.

[0044] For the convenience of explanation, in the embodiments of the present application, an example is generally taken in which the same rectifier module 40 is electrically connected to M second antenna units 20 for explanation.

[0045] For example: Figure 2 As shown, the same rectifier module 40 is integrated at the rear end of the M second antenna units 20 through the power divider module 50 .

[0046] As an optional implementation, Figure 4 , Figure 5 or Figure 8 As shown, the rectifier module 40 includes: a capacitor isolator 16, a matching network 13, a rectifier diode 17, a harmonic suppression circuit 14 and a DC filter circuit 15;

[0047] A first end of the capacitor isolator 16 is electrically connected to the M second antenna units 20, a second end of the capacitor isolator 16 is electrically connected to a first end of the matching network 13, a second end of the matching network 13 is electrically connected to a first end of the harmonic suppression circuit 14 and a first end of the DC filter circuit 15, a second end of the harmonic suppression circuit 14 is electrically connected to a cathode of a rectifier diode 17, an anode of the rectifier diode 17 is grounded, and a second end of the DC filter circuit 15 is grounded.

[0048] In some implementations, the operating frequency range of the rectifier module 40 in the embodiment of the present application may be 2 GHz-30 GHz.

[0049] In some implementations, the circuit structure of the rectifier module 40 may be integrated at the rear end of the M second antenna units 20 , which may simplify the structure of the rectifier antenna module.

[0050] In some embodiments, the functions of the capacitor isolator 16, the matching network 13, the harmonic suppression circuit 14, the DC filter circuit 15, and the rectifier diode 17 are as follows:

[0051] 1) The capacitor isolator 16 is used to isolate the excitation signal of the feeding module 30 and allow the AC signal collected by the M second antenna units 20 to pass through, so that the matching network 13, harmonic suppression circuit 14, rectifier diode 17 and DC filter circuit 15 at the back end of the capacitor isolator 16 can perform subsequent processing on the AC signal.

[0052] 2) The matching network 13 is used to adjust the impedance matching of the M second antenna units 20 to achieve an impedance matching function corresponding to the working frequency band of the second array antenna 200 .

[0053] In some embodiments, the matching network 13 includes at least two microstrip lines connected in series. Thus, by using multiple microstrip lines connected in series, the matching network 13 can be applied to impedance matching in multiple frequency bands, and the working bandwidth of the M second antenna units 20 can be increased.

[0054] 3) Rectifier diode 17, used to convert AC power into DC power, for example, it can be a Schottky diode.

[0055] In some embodiments, at least two rectifier diodes 17 may be connected in parallel between the second end of the harmonic suppression circuit 14 and the ground layer. In this way, at least two rectifier diodes 17 may be used in parallel to realize the conversion of AC power to DC power, thereby improving the conversion efficiency.

[0056] 4) The harmonic suppression circuit 14 is used to filter the higher harmonics generated after the energy enters the rectifier diode 17, so as to avoid reflecting the higher harmonics back to the rectifier diode 17 to cause secondary rectification, thereby improving the rectification efficiency.

[0057] 5) The DC filter circuit 15 may be composed of components such as an inductor 18 and a capacitor 19, and can filter out the fundamental wave and the second harmonic that account for the largest proportion in the circuit.

[0058] In some embodiments, the rectifier module 40 may adopt a class-F rectifier circuit. The class-F rectifier circuit can transform the voltage and current waveforms into square half-sine waves, thereby improving the rectification efficiency.

[0059] In this embodiment, by providing a capacitor isolator 16, a matching network 13, a rectifier diode 17, a harmonic suppression circuit 14 and a DC filter circuit 15 in the rectifier module 40, the efficiency and reliability of converting the energy of the focused beam received by the M second antenna units 20 into direct current can be improved.

[0060] In some embodiments, the feeding module 30 may include two sets of feeding networks, so that the first array antenna 100 composed of N first antenna units 10 and the second array antenna 200 composed of M second antenna units 20 are fed by different feeding networks. In addition, the two sets of feeding networks can be located in different planes, so that on the basis of realizing beam separation of multifunctional hybrid beams according to functions, that is, the beam used to transmit communication information is separated from the beam used to transmit wireless charging, which can effectively reduce the coupling between the two sets of feeding networks and improve the isolation between the two.

[0061] Of course, the beam used to transmit communication information and the beam used to transmit wireless charging may not be separated, and the first array antenna 100 composed of N first antenna units 10 and the second array antenna 200 composed of M second antenna units 20 can share the same feeding module 30. For the sake of convenience, in the embodiment of the present application, an example is given in which the first array antenna 100 composed of N first antenna units 10 and the second array antenna 200 composed of M second antenna units 20 can share the same feeding module 30, which is not constituted a specific limitation here.

[0062] As an optional implementation, the mode of the vortex electromagnetic wave generated by the first array antenna 100 composed of N first antenna units 10 is different from the mode of the beam generated by the second array antenna 200 composed of M second antenna units 20.

[0063] Among them, since the amplitudes and phases of the M second antenna units 20 are equal, the mode l2 of the second array antenna 200 formed by the M second antenna units 20 is zero.

[0064] The mode l1 of the vortex electromagnetic wave generated by the first array antenna 100 composed of N first antenna units 10 can take any value within the range of its maximum mode l. For example, if the maximum mode of the vortex electromagnetic wave generated by the first array antenna 100 is ±3, then the mode l1 of the vortex electromagnetic wave generated by the first array antenna 100 can take any value among +1, -1, +2, -2, +3, and -3.

[0065] The maximum mode l of the vortex electromagnetic wave generated by the first array antenna 100 composed of N first antenna units 10 is determined by the value of N and the phase spacing of the excitation signals of adjacent first antenna units 10 in the first array antenna 100. For details, refer to the formula: in, represents the phase interval between the excitation signals of adjacent first antenna units 10 in the first array antenna 100 .

[0066] For example: Figure 2 As shown, when N is equal to 8, when the maximum mode of the vortex electromagnetic wave generated by the first array antenna 100 is ±1, the phases of the eight first antenna units 10 in the first array antenna 100 are a1=0°, a2=45°, a3=90°, a4=135°, a5=180°, a6=225°, a7=270°, and a8=315°; when the maximum mode of the vortex electromagnetic wave generated by the first array antenna 100 is ±2, the phases of the eight first antenna units 10 in the first array antenna 100 are The phases are a1=0°, a2=90°, a3=180°, a4=270°, a5=0°, a6=90°, a7=180°, a8=270°; when the maximum mode of the vortex electromagnetic wave generated by the first array antenna 100 is ±3, the phases of the eight first antenna units 10 in the first array antenna 100 are a1=0°, a2=135°, a3=270°, a4=45°, a5=180°, a6=315°, a7=90°, a8=225°. Among them, a1, a2, a3, a4, a5, a6, a7 and a8 respectively represent the phases of the eight first antenna units 10 arranged in sequence in the first array antenna 100.

[0067] Another example: Figure 8As shown, when N is equal to 12, when the maximum mode of the vortex electromagnetic wave generated by the first array antenna 100 is ±1, the phases of the twelve first antenna units 10 in the first array antenna 100 are b1=0°, b2=30°, b3=60°, b4=90°, b5=120°, b6=150°, b7=180°, b8=210°, b9=240°, b10=270°, b11=300°, b12=330°. When the maximum mode of the vortex electromagnetic wave generated by the first array antenna 100 is ±2, the phases of the twelve first antenna units 10 in the first array antenna 100 are b1=0°, b2=60°, b3=120°, b4=180°, b5=240°, b6=300°, b7=360°, b8=60°, b9=120°, b10=180°, b11=240°, b12=300°; when the maximum mode of the vortex electromagnetic wave generated by the first array antenna 100 is ±3, the phases of the twelve first antenna units 10 in the first array antenna 100 are b1=0°, b2=90°, b3=180°, b4=270°, b5=360°, b6=90°, b7=180°, b8=270°, b9=360°, b10=90°, b11=180°, b12=270°. Among them, b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11 and b12 respectively represent the phases of the twelve first antenna units 10 arranged in sequence in the first array antenna 100.

[0068] In this embodiment, the modes of the receiving beams of the first array antenna 100 and the second array antenna 200 are different, so that the receiving beams of the first array antenna 100 and the second array antenna 200 can be orthogonal, thereby reducing the mutual interference between the first array antenna 100 and the second array antenna 200, and improving the communication performance and energy collection efficiency of the rectenna module.

[0069] As an optional implementation, Figure 2 As shown, the rectenna module provided in the embodiment of the present application further includes: a first dielectric layer 60, a second dielectric layer 70 and a ground layer 80;

[0070] The ground layer 80 is sandwiched between the first dielectric layer 60 and the second dielectric layer 70;

[0071] N first antenna units 10 , M second antenna units 20 and the rectifying module 40 are arranged on the surface of the first dielectric layer 60 facing away from the second dielectric layer 70 ; the feeding module 30 is arranged on the surface of the second dielectric layer 70 facing away from the first dielectric layer 60 .

[0072] In some embodiments, the first dielectric layer 60 has a thickness of 0.5 mm and a relative dielectric constant of 2.65, and the second dielectric layer 70 has a thickness of 1.5 mm and a relative dielectric constant of 2.65.

[0073] Of course, the thickness of the first dielectric layer 60 and the second dielectric layer 70 , as well as the relative dielectric constants of the first dielectric layer 60 and the second dielectric layer 70 can be flexibly adjusted according to application scenarios, requirements, etc., which are only used as examples.

[0074] In some embodiments, the N first antenna units 10 , the M second antenna units 20 , and the rectifier module 40 may be attached to the surface of the first dielectric layer 60 facing away from the second dielectric layer 70 in the form of metal patches.

[0075] In this embodiment, mutual interference between the feeding module 30 and the N first antenna units 10 , the M second antenna units 20 and the rectifying module 40 can be reduced.

[0076] In some embodiments, Figure 2 and Figure 3 As shown, the first dielectric layer 60 is provided with a first metal via 61, the second dielectric layer 70 is provided with a second metal via 71, and the ground layer 80 is provided with a third metal via 81;

[0077] The first metal via 61, the second metal via 71 and the third metal via 81 are coaxially arranged, and the aperture of the third metal via 81 is larger than the apertures of the first metal via 61 and the second metal via 71;

[0078] The first end of the first metal via 61 is electrically connected to the N first antenna units 10 , the second end of the first metal via 61 passes through the third metal via 81 and is electrically connected to the first end of the second metal via 71 , and the second end of the second metal via 71 is electrically connected to the first feeding port 31 .

[0079] Among them, the aperture of the third metal via 81 is larger than the aperture of the first metal via 61 and the second metal via 71, so that there is a certain gap between the outer walls of the first metal via 61 and the second metal via 71 and the inner walls of the third metal via 81, thereby preventing the first metal via 61 and the second metal via 71 from electrically contacting the ground layer.

[0080] In some embodiments, Figure 2 and Figure 6 As shown, the feeding module 30 includes N first feeding ports 31 . At this time, each first feeding port 31 is correspondingly provided with a first metal via 61 , a second metal via 71 and a third metal via 81 .

[0081] In some embodiments, the apertures of the first metal via 61 and the second metal via 71 may be 0.2 mm to 2 mm, and the aperture of the third metal via 81 may be 2 mm to 3 mm, preventing the first metal via 61 and the second metal via 71 from electrically contacting the ground layer 80 .

[0082] It should be noted that the first feeding port 31 corresponds to the first antenna unit 10 one by one, and a first feeding port 31 and a first antenna unit 10 corresponding to each other are arranged opposite to each other. In this way, the electrical connection between the first antenna unit 10 located on the first dielectric layer 60 and the first feeding port 31 located on the second dielectric layer 70 is realized by means of metal vias, which can shorten the linear length of the conductive structure between the first feeding port 31 and the first antenna unit 10, thereby reducing the loss of the conductive structure to the excitation signal.

[0083] For example, if N first antenna units 10 form a circular array with a radius of 50 mm, then the N first feeding ports 31 may also be arranged in a circle with a radius of 50 mm, and a corresponding first feeding port 31 and a first antenna unit 10 are aligned in a direction perpendicular to the first dielectric layer 60 .

[0084] Of course, in other embodiments, the electrical connection between the first antenna unit 10 located on the first dielectric layer 60 and the first feeding port 31 located on the second dielectric layer 70 may be achieved by means of wires, springs, etc., which are not specifically limited here.

[0085] In some embodiments, Figure 6 As shown, the first end 33 of the feeding module 30 is used to be electrically connected to the feed source, and a phase adjustment structure 34 is provided between two adjacent first feeding ports 31 on the feeding module 30 for being electrically connected to the adjacent first antenna units 10, wherein, for two adjacent first feeding ports 31, the phase adjustment structure 34 can make the excitation signal provided by one first feeding port 31 lag behind or lead the excitation signal provided by the other first feeding port 31 by a certain phase value.

[0086] In this embodiment, the same feed source can generate multiple excitation signals with equal amplitudes and equal phase intervals through the phase adjustment structure 34 on the feeding module 30, so as to provide excitation signals with equal amplitudes and equal phase intervals to the first antenna units arranged in sequence among the N first antenna units 10 through the N first feeding ports 31 on the feeding module 30.

[0087] In some embodiments, metal vias can be used to achieve electrical connection between the second antenna unit 20 located on the first dielectric layer 60 and the second feeding port 32. The structural principle and function are the same as those of the aforementioned embodiment in which metal vias are used to achieve electrical connection between the first antenna unit 10 located on the first dielectric layer 60 and the first feeding port 31 located on the second dielectric layer 70, and are not repeated here.

[0088] Of course, the electrical connection between the second antenna unit 20 and the second feeding port 32 can also be implemented in a manner different from the electrical connection between the first antenna unit 10 and the first feeding port 31. For example, when the first feeding port 31 and the second feeding port 32 are arranged in feeding networks located in different planes, the electrical connection between the second antenna unit 20 and the second feeding port 32 is implemented in a manner different from the electrical connection between the first antenna unit 10 and the first feeding port 31.

[0089] In some implementations, side feeding may be used.

[0090] In some embodiments, a fourth metal via 62 may be opened on the first dielectric layer 60 , and a ground patch 82 may be provided on the ground layer 80 , so that the rectifier module 40 is electrically connected to the ground layer 80 through the fourth metal via 62 and the ground patch 72 , so as to achieve grounding of the rectifier module 40 .

[0091] The radius of the fourth metal via 62 may be 0.5 mm or any other size.

[0092] As an optional implementation, the first antenna unit 10 is an L-shaped microstrip antenna unit, and L is an integer greater than or equal to 3;

[0093] and / or,

[0094] The side length of the first antenna unit 10 is 0.3λ1~λ1, where λ1 is the operating frequency of the array antenna formed by the N first antenna units 10.

[0095] In the embodiment of the present application, an example in which L is equal to 4, that is, the first antenna unit 10 is a quadrilateral microstrip antenna unit, is used for illustration, which does not constitute a specific limitation herein.

[0096] As an optional implementation, the second antenna unit 20 is a rectangular microstrip antenna unit;

[0097] and / or,

[0098] The side length of the second antenna unit 20 is 0.3λ2~λ2, where λ2 is the operating frequency of the array antenna formed by the M second antenna units 20.

[0099] In some implementations, the operating frequency range of the array antenna formed by the N first antenna units 10 may be: 2 GHz-30 GHz.

[0100] In some implementations, the operating frequency range of the array antenna formed by the M second antenna units 20 may be 2 GHz-30 GHz.

[0101] In some embodiments, the operating frequency range of the rectifier module 40 may be 2 GHz-30 GHz.

[0102] In this way, the operating frequency ranges of the array antenna formed by the N first antenna units 10, the array antenna formed by the M second antenna units 20, and the rectifier module 40 are consistent.

[0103] As an optional implementation, the N first antenna units 10 are distributed in a circular array with equal spacing, and the radius of the circular array is greater than or equal to 50 mm.

[0104] In this way, the circular array can surround the M second antenna units and generate vortex electromagnetic waves in the normal direction of the plane where the N first antenna units 10 are located, so as to receive corresponding information beams.

[0105] As an optional implementation manner, the M second antenna units 20 are distributed in a two-dimensional array with equal spacing, and the spacing between any two adjacent second antenna units 20 is greater than or equal to 10 mm.

[0106] In some embodiments, the M second antenna units 20 are distributed in a p×q two-dimensional array, wherein p and q represent the lateral dimension and the longitudinal dimension of the two-dimensional array respectively, and p≥2, and q≥2.

[0107] In some embodiments, the equally spaced two-dimensional array distribution means that dx and dy of any two adjacent second antenna units 20 in the two-dimensional array are equal to the same fixed constant, wherein dx represents the lateral spacing between the two adjacent second antenna units 20, and dy represents the longitudinal spacing between the two adjacent second antenna units 20.

[0108] In this embodiment, the two-dimensional array antenna can improve the gain of the M second antenna units 20. In this way, the microwave energy collection efficiency can be improved by using the M second antenna units 20 to collect microwave energy.

[0109] For ease of understanding, the structural principle and performance of the rectenna module of the present application are illustrated by taking the following embodiments as examples:

[0110] like Figures 2 to 6 As shown, in this embodiment, N=8, M=4.

[0111] Among them, 8 first antenna units 10 with the same polarization form a circular array with a radius of 60mm, and the operating frequency range is: 5.5GHz-5.9GHz. The side length of the first antenna unit 10 is 0.3λ1~λ1, and λ1 is the operating frequency of the array antenna composed of N first antenna units 10.

[0112] The four second antenna units 20 are distributed in a 2×2 two-dimensional array, and the spacing between any two adjacent second antenna units 20 is dx=dy=14mm. The operating frequency range is 5.5GHz-5.9GHz. The side length of the second antenna unit 20 is 0.3λ2~λ2, and λ2 is the operating frequency of the array antenna composed of M second antenna units 20.

[0113] The overall size of the rectifier antenna module is 150mm×150mm, that is, the first dielectric layer 60, the second dielectric layer 70 and the ground layer 80 are distributed in a square of 150mm×150mm. The thickness of the first dielectric layer 60 is 0.5mm, and the relative dielectric constant is 2.65. The thickness of the second dielectric layer 70 is 1.5mm, and the relative dielectric constant is 2.65. The first array antenna 100, the second array antenna 200, the power divider module 50 and the rectifier module 40 are all attached to the upper surface of the first dielectric layer 60, and the feed module 30 is arranged on the lower surface of the second dielectric layer 70.

[0114] At this time, if Figure 7 As shown, port 1 represents the second feeding port 32, and port 2 represents the first feeding port 31. Figure 7 It can be seen that when the first array antenna 100 composed of eight first antenna units 10 and the second array antenna 200 composed of four second antenna units 20 both operate at 5.8 GHz, the reflection coefficient S11 of port 1 and the reflection coefficient S22 of port 2 are both less than -15 dB.

[0115] An embodiment of the present application also provides an electronic device, which includes the rectenna module provided in the aforementioned embodiment of the present application.

[0116] It should be noted that the electronic device provided in the embodiment of the present application may be a terminal, or may be other devices other than a terminal. Exemplarily, the electronic device may be a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) device, a robot, a wearable device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), etc., and may also be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0117] In the embodiment of the present application, by setting the rectifying antenna mode of the embodiment of the present application on the electronic device, the rectifying antenna module can be used to simultaneously perform beam information reception and wireless charging.

[0118] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0119] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A rectifying antenna module, characterized in that: include: N first antenna units, M second antenna units, a feeding module and a rectifying module; The M second antenna units are spaced apart from each other and distributed in an array, and M is an integer greater than or equal to 4; The N first antenna units are arranged at intervals from each other and surround the M second antenna units, where N is an integer greater than or equal to 4; The feeding module includes a first feeding port and a second feeding port, the first feeding port is electrically connected to the N first antenna units, and is used to provide excitation signals with equal amplitude and equal phase intervals to the first antenna units arranged in sequence among the N first antenna units; the second feeding port is electrically connected to the M second antenna units, and is used to provide excitation signals with equal amplitude and equal phase intervals to the M second antenna units; The rectifier module is electrically connected to the M second antenna units.

2. The rectenna module according to claim 1, characterized in that: The rectifier module includes: a capacitor isolator, a matching network, a rectifier diode, a harmonic suppression circuit and a DC filter circuit; The first end of the capacitor isolator is electrically connected to the M second antenna units, the second end of the capacitor isolator is electrically connected to the first end of the matching network, the second end of the matching network is electrically connected to the first end of the harmonic suppression circuit and the first end of the DC filter circuit, the second end of the harmonic suppression circuit is electrically connected to the cathode of the rectifier diode, the anode of the rectifier diode is grounded, and the second end of the DC filter circuit is grounded.

3. The rectenna module according to claim 1, characterized in that: Also includes: A power divider module, wherein the second feeding port is electrically connected to the M second antenna units through the power divider module.

4. The rectenna module according to any one of claims 1 to 3, characterized in that: Also includes: A first dielectric layer, a second dielectric layer and a ground layer; The ground layer is sandwiched between the first dielectric layer and the second dielectric layer; The N first antenna units, the M second antenna units and the rectifying module are arranged on a surface of the first dielectric layer facing away from the second dielectric layer; and the feeding module is arranged on a surface of the second dielectric layer facing away from the first dielectric layer.

5. The rectenna module according to claim 4, characterized in that: The first dielectric layer is provided with a first metal via, the second dielectric layer is provided with a second metal via, and the ground layer is provided with a third metal via; The first metal via, the second metal via and the third metal via are coaxially arranged, and the aperture of the third metal via is larger than the apertures of the first metal via and the second metal via; The first end of the first metal via is electrically connected to the N first antenna units, the second end of the first metal via passes through the third metal via and is electrically connected to the first end of the second metal via, and the second end of the second metal via is electrically connected to the first feeding port.

6. The rectenna module according to any one of claims 1 to 3, characterized in that: The first antenna unit is an L-shaped microstrip antenna unit, and L is an integer greater than or equal to 3; and / or, The side length of the first antenna unit is 0.3λ1~λ1, and the λ1 is the operating frequency of the array antenna formed by the N first antenna units.

7. The rectenna module according to any one of claims 1 to 3, characterized in that: The second antenna unit is a rectangular microstrip antenna unit; and / or, The side length of the second antenna unit is 0.3λ2~λ2, and the λ2 is the operating frequency of the array antenna formed by the M second antenna units.

8. The rectenna module according to any one of claims 1 to 3, characterized in that: The N first antenna units are distributed in a circular array with equal spacing, and the radius of the circular array is greater than or equal to 50 mm.

9. The rectenna module according to any one of claims 1 to 3, characterized in that: The M second antenna units are distributed in a two-dimensional array with equal spacing, and the spacing between any two adjacent second antenna units is greater than or equal to 10 mm.

10. The rectenna module according to claim 2, characterized in that: The matching network includes at least two microstrip lines connected in series.

11. The rectenna module according to any one of claims 1 to 3, characterized in that: The mode of the vortex electromagnetic wave generated by the first array antenna composed of the N first antenna units is different from the mode of the beam generated by the second array antenna composed of the M second antenna units.

12. An electronic device, characterized in that: The electronic device comprises the rectenna module according to any one of claims 1 to 11.

Images