Rectenna module and electronic device

Abstract

The application discloses a rectifying antenna module and electronic equipment, and belongs to the technical field of communication. The rectifying antenna module comprises N first antenna units, M second antenna units, a feeding module and a rectifying module. The M second antenna units are arranged at intervals and are arrayed. 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. N is an integer greater than or equal to 4. The feeding module comprises a first feeding port and a second feeding port. The first feeding port is electrically connected with the N first antenna units and is used for providing first antenna units arranged in sequence among the N first antenna units with excitation signals of equal amplitude and equal phase interval. The second feeding port is electrically connected with the M second antenna units and is used for providing the M second antenna units with excitation signals of equal amplitude and equal phase. The rectifying module is electrically connected with the M second antenna units.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a rectifier antenna module and electronic equipment. Background Technology

[0002] Rectifier antennas possess electromagnetic wave capture capability, AC-to-DC conversion capability, and wireless communication performance in far-field wireless power transmission. However, rectifier antennas in related technologies cannot simultaneously perform beam information reception and energy harvesting. Summary of the Invention

[0003] The purpose of this application embodiment is to provide a rectifier antenna module and electronic device, which, by setting two array antennas, one of which can be used to receive beam information and the other array antenna can be used to collect microwave energy, enables the rectifier antenna module to simultaneously receive beam information and collect energy.

[0004] In a first aspect, embodiments of this application provide a rectifier antenna module, which includes: N first antenna elements, M second antenna elements, a feeding module, and a rectifier module;

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

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

[0007] The power supply module includes a first power supply port and a second power supply port. The first power supply port is electrically connected to the N first antenna elements and is used to provide excitation signals with equal amplitude and equal phase spacing to the first antenna elements arranged in sequence among the N first antenna elements. The second power supply port is electrically connected to the M second antenna elements and is used to provide excitation signals with equal amplitude and equal phase to the M second antenna elements.

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

[0009] Secondly, embodiments of this application provide an electronic device that includes the rectifier antenna module as described in the first aspect.

[0010] In this embodiment, the rectifier antenna module includes two array antennas. The first array antenna consists of N first antenna elements, and the second array antenna consists of M second antenna elements. The first array antenna surrounds the second array antenna. The feeding module provides excitation signals of equal amplitude and equal phase intervals to the sequentially arranged first antenna elements in the first array antenna through a first feeding port, and provides excitation signals of equal amplitude and equal phase to each second antenna element in the second array antenna through a second feeding port. At this time, the first array antenna can be used to realize beam information reception, while the second array antenna is electrically connected to the rectifier 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 by the rectifier module, thereby realizing the collection of microwave energy. This allows the rectifier antenna module to simultaneously perform beam information reception and energy collection. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a rectifier antenna module provided in the embodiments of this application;

[0012] Figure 2 This is a schematic diagram of the disassembled structure of a rectifier antenna module provided in an embodiment of this application;

[0013] Figure 3 This is a cross-sectional view of a rectifier antenna module provided in an embodiment of this application;

[0014] Figure 4 This is one of the structural schematic diagrams of N first antenna units, M second antenna units, power divider module and rectifier module in the embodiments of this application;

[0015] Figure 5 yes Figure 4 A magnified view of a portion of region A in the middle;

[0016] Figure 6 This is a schematic diagram of the power supply module in an embodiment of this application;

[0017] Figure 7 This is a graph showing the reflection coefficient of the rectifier antenna module provided in the embodiments of this application;

[0018] Figure 8 This is the second schematic diagram of the structure of N first antenna units, M second antenna units, power divider module and rectifier module in the embodiments of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] The rectifier antenna module and electronic equipment provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0022] See Figure 1 The rectifier antenna module provided in this application embodiment includes: N first antenna elements 10, M second antenna elements 20, a power supply module 30, and a rectifier module 40;

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

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

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

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

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

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

[0029] Furthermore, the M second antenna elements 20 constitute the second array antenna 200. The excitation signal amplitude of each second antenna element 20 in the second array antenna 200 is equal and the phase is the same, so that microwave energy can be collected in parallel by the M second antenna elements. The microwave energy collected by the M second antenna elements is converted into DC power by the rectifier module electrically connected to the second array antenna 200.

[0030] It is worth mentioning that by wrapping the first array antenna 100 around the second array antenna 200, the second array antenna 200, which is surrounded by the first array antenna 100, can be made more concentrated, thereby improving the energy harvesting efficiency of the second array antenna 200. In addition, the first array antenna 100 wrapping around 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 and the antenna performance of the first array antenna 100 is improved.

[0031] It is worth noting that in related technologies, a rectifier antenna is constructed using a dipole antenna and a rectifier circuit. This scheme has the drawback of low antenna energy conversion efficiency. For example, when the input RF frequency is 5.6 GHz, the maximum rectification efficiency of the rectifier antenna is less than 50%.

[0032] In this embodiment, the use of a second array antenna 200 composed of M second antenna elements 20 for microwave energy harvesting can improve the antenna energy conversion efficiency. For example, when the input RF frequency is 5.8 GHz, the maximum rectification efficiency of the rectifier antenna can reach 80.3%. Furthermore, a first array antenna 100 is arranged around the second array antenna 200, and excitation signals with equal amplitude and phase spacing are provided to the first antenna elements 10 arranged sequentially in the first array antenna 100 through the first feed port 31 of the feed module 30. This enables the first array antenna 100 to be used for beam information reception; that is, the rectifier antenna module of this embodiment can simultaneously achieve communication signal reception and microwave energy harvesting.

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

[0034] For example: Assuming N equals 4 and the phase spacing between adjacent first antenna elements 10 is 90°, then the phases of the four first antenna elements 10 arranged in sequence can be 0°, 90°, 180°, and 270°.

[0035] In some implementations, the number of second power supply ports 32 is one or at least two, in which case different second antenna units 20 can be electrically connected to the same or different second power supply ports 32.

[0036] For ease of explanation, this embodiment of the application uses the example of having N first power supply ports 31 and 1 second power supply port 32, which does not constitute a specific limitation.

[0037] In some implementations, M is an integer greater than or equal to 4, and N is an integer greater than or equal to 4. 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... Figures 1 to 6 The illustrated embodiment uses an example where M equals 4 and N equals 8, and in the case of... Figure 8 The illustrated embodiment uses M equal to 16 and N equal to 12 as an example for illustration. The values ​​of M and N are not specifically limited here.

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

[0039] In the case of one rectifier module 40, the AC energy collected by M second antenna units 20 can be gathered into the same rectifier module 40, so as to use the same rectifier module 40 to convert the AC energy collected by M second antenna units 20 into DC energy.

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

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

[0042] In this embodiment, the same second feed port 32 distributes excitation signals with equal amplitude and consistent phase to the M second antenna units 20 through the power divider module 50. Furthermore, the microwave energy collected by the M second antenna units 20 can be transmitted to the same rectifier module 40 through the power divider module 50. Compared with the implementation of setting separate second feed ports 32 and rectifier modules 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 M second antenna units 20 correspond one-to-one with M rectifier modules 40. In this way, one rectifier module 40 is used to convert the AC energy collected by the corresponding second antenna unit 20 into DC energy.

[0044] For ease of explanation, in the embodiments of this application, the example is usually taken as the same rectifier module 40 being electrically connected to M second antenna units 20.

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

[0046] As an optional implementation method, such as 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] The first end of the capacitor isolator 16 is electrically connected to M second antenna units 20. The second end of the capacitor isolator 16 is electrically connected to the first end of the matching network 13. The second end of the matching network 13 is electrically connected to the first end of the harmonic suppression circuit 14 and the first end of the DC filter circuit 15. The second end of the harmonic suppression circuit 14 is electrically connected to the cathode of the rectifier diode 17. The anode of the rectifier diode 17 is grounded. The second end of the DC filter circuit 15 is grounded.

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

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

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

[0051] 1) Capacitor isolator 16 is used to isolate the excitation signal of power supply module 30 and allow the AC signal collected by 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 behind capacitor isolator 16 can perform subsequent processing on the AC signal.

[0052] 2) Matching network 13 is used to adjust the impedance matching of M second antenna elements 20 to achieve impedance matching function corresponding to the operating frequency band of the second array antenna 200.

[0053] In some implementations, the matching network 13 includes at least two microstrip lines connected in series. This multi-strip line series configuration allows the matching network 13 to be suitable for impedance matching across various frequency bands, thereby increasing the operating bandwidth of the M second antenna units 20.

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

[0055] In some implementations, at least two rectifier diodes 17 can be connected in parallel between the second terminal of the harmonic suppression circuit 14 and the ground plane. In this way, at least two rectifier diodes 17 can convert AC power to DC power in parallel, thereby improving the conversion efficiency.

[0056] 4) Harmonic suppression circuit 14 is used to filter the high-order harmonics generated after the energy enters the rectifier diode 17, so as to avoid reflecting the high-order harmonics back to the rectifier diode 17 and causing secondary rectification, thereby improving the rectification efficiency.

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

[0058] In some embodiments, the rectifier module 40 may employ a class-F rectifier circuit, which can form square half-sine waves for voltage and current waveforms, thereby improving 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 DC power can be improved.

[0060] In some embodiments, the power supply module 30 may include two power supply networks, such that the first array antenna 100 composed of N first antenna elements 10 and the second array antenna 200 composed of M second antenna elements 20 are powered by different power supply networks. Furthermore, the two power supply networks can be located in different planes. This effectively reduces coupling between the two power supply networks and improves their isolation, based on the functional beam separation of the multi-functional hybrid beam (i.e., separating the beam used for transmitting communication information from the beam used for wireless charging).

[0061] Of course, the beam used to transmit communication information and the beam used to transmit wireless charging can be not separated, and the first array antenna 100 composed of N first antenna elements 10 and the second array antenna 200 composed of M second antenna elements 20 can share the same feed module 30. For ease of explanation, in this embodiment, the example of the first array antenna 100 composed of N first antenna elements 10 and the second array antenna 200 composed of M second antenna elements 20 sharing the same feed module 30 is used for illustration, which does not constitute a specific limitation.

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

[0063] Since the amplitudes and phases of the M second antenna elements 20 are equal, the mode l2 of the second array antenna 200 composed of the M second antenna elements 20 is 0.

[0064] The mode l1 of the vortex electromagnetic wave generated by the first array antenna 100 composed of N first antenna elements 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 elements 10 is determined by the value of N and the phase spacing of the excitation signals of adjacent first antenna elements 10 in the first array antenna 100, as shown in the following formula: in, This represents the phase spacing between the excitation signals of adjacent first antenna elements 10 in the first array antenna 100.

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

[0067] For example: Figure 8As shown, when N equals 12, and the maximum mode of the vortex electromagnetic wave generated by the first array antenna 100 is ±1, the phases of the twelve first antenna elements 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°, and 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 elements 10 in the first array antenna 100 are b1 = 0°, b2 = 60°, and so on. 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 elements 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°. Wherein, b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11 and b12 represent the phases of the twelve sequentially arranged first antenna elements 10 in the first array antenna 100.

[0068] In this embodiment, the receiving beam modes of the first array antenna 100 and the second array antenna 200 are different, which can make the receiving beams of the first array antenna 100 and the second array antenna 200 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 harvesting efficiency of the rectifier antenna module.

[0069] As an optional implementation method, such as Figure 2 As shown, the rectifier antenna module provided in this application embodiment further includes: a first dielectric layer 60, a second dielectric layer 70, and a ground layer 80;

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

[0071] N first antenna elements 10, M second antenna elements 20 and rectifier module 40 are disposed on the surface of the first dielectric layer 60 facing away from the second dielectric layer 70; power supply module 30 is disposed 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 permittivity of 2.65, and the second dielectric layer 70 has a thickness of 1.5 mm and a relative permittivity 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 permittivity of the first dielectric layer 60 and the second dielectric layer 70, can be flexibly adjusted according to the application scenario, requirements, etc., and are only used as examples here.

[0074] In some embodiments, N first antenna elements 10, M second antenna elements 20 and rectifier module 40 can 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] This embodiment can reduce the mutual interference between the power supply module 30 and the N first antenna units 10, the M second antenna units 20 and the rectifier module 40.

[0076] In some implementations, such as 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 diameter of the third metal via 81 is larger than the diameter 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 N first antenna elements 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. The second end of the second metal via 71 is electrically connected to the first feed port 31.

[0079] The diameter of the third metal via 81 is larger than that of the first metal via 61 and the second metal via 71, which allows for a certain gap between the outer sidewall of the first metal via 61 and the second metal via 71 and the inner sidewall of the third metal via 81, thus preventing the first metal via 61 and the second metal via 71 from making electrical contact with the grounding layer.

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

[0081] In some embodiments, the diameter of the first metal via 61 and the second metal via 71 can be 0.2 mm to 2 mm, and the diameter of the third metal via 81 can be 2 mm to 3 mm, to prevent the first metal via 61 and the second metal via 71 from making electrical contact with the ground layer 80.

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

[0083] For example, if N first antenna elements 10 form a circular array with a radius of 50 mm, then N first feed ports 31 can also be arranged in a circle with a radius of 50 mm, and one corresponding first feed port 31 and one first antenna element 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 element 10 located on the first dielectric layer 60 and the first feed port 31 located on the second dielectric layer 70 can be achieved by means of wires, springs, etc., which are not specifically limited here.

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

[0086] In this embodiment, multiple excitation signals with equal amplitude and equal phase spacing can be generated by the same feed source through the phase modulation structure 34 on the feed module 30, so as to provide excitation signals with equal amplitude and equal phase spacing to the first antenna elements arranged in sequence among the N first antenna elements 10 through the N first feed ports 31 on the feed module 30.

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

[0088] Of course, the electrical connection between the second antenna unit 20 and the second feed port 32 can also be implemented in a different way than the electrical connection between the first antenna unit 10 and the first feed port 31. For example, when the first feed port 31 and the second feed port 32 are set in feed networks located in different planes, the electrical connection between the second antenna unit 20 and the second feed port 32 can be implemented in a different way than the electrical connection between the first antenna unit 10 and the first feed port 31.

[0089] In some implementations, a side-feed method can be used for power supply.

[0090] In some embodiments, a fourth metal via 62 can be formed on the first dielectric layer 60, and a grounding patch 72 can be provided on the ground layer 80 to electrically connect the rectifier module 40 to the ground layer 80 through the fourth metal via 62 and the grounding patch 72, so as to realize the grounding of the rectifier module 40.

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

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

[0093] And / or,

[0094] The side length of the first antenna element 10 is 0.3λ1~λ1, where λ1 is the operating frequency of the array antenna composed of N first antenna elements 10.

[0095] In this embodiment of the application, the example is given with L equal to 4, that is, the first antenna element 10 is a quadrilateral microstrip antenna element, which does not constitute a specific limitation.

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

[0097] And / or,

[0098] The side length of the second antenna element 20 is 0.3λ2 to λ2, where λ2 is the operating frequency of the array antenna composed of M second antenna elements 20.

[0099] In some implementations, the operating frequency range of the array antenna composed of N first antenna elements 10 can be 2GHz-30GHz.

[0100] In some implementations, the operating frequency range of the array antenna composed of M second antenna elements 20 can be 2GHz-30GHz.

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

[0102] In this way, the array antenna composed of N first antenna elements 10, the array antenna composed of M second antenna elements 20, and the rectifier module 40 have the same operating frequency range.

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

[0104] In this way, the annular array can surround M second antenna elements and generate vortex electromagnetic waves in the normal direction of the plane where N first antenna elements 10 are located, which are used to receive the corresponding information beam.

[0105] As an optional implementation, 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 implementations, the M second antenna elements 20 are distributed in a two-dimensional array of p×q, where p and q represent the horizontal and vertical dimensions of the two-dimensional array, respectively, p≥2, and q≥2.

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

[0108] In this embodiment, using a two-dimensional array antenna can improve the gain of the M second antenna elements 20. Thus, using the M second antenna elements 20 to collect microwave energy can improve the microwave energy collection efficiency.

[0109] To facilitate understanding, the structural principle and performance of the rectifier antenna module of this application will be illustrated by the following embodiment:

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

[0111] Among them, eight first antenna elements 10 with the same polarization are arranged in a circular array with a radius of 60mm. The operating frequency range is 5.5GHz-5.9GHz. The side length of the first antenna element 10 is 0.3λ1~λ1, where λ1 is the operating frequency of the array antenna composed of N first antenna elements 10.

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

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

[0114] At this time, as Figure 7 As shown, port 1 represents the second feed port 32, and port 2 represents the first feed port 31. (The rest of the text appears to be a continuation of the previous sentence.) Figure 7 It can be seen that when the first array antenna 100 composed of 8 first antenna elements 10 and the second array antenna 200 composed of 4 second antenna elements 20 are both operating 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] This application also provides an electronic device, which includes the rectifier antenna module provided in the foregoing embodiments of this application.

[0116] It should be noted that the electronic device provided in this application embodiment can be a terminal, or it can be any other device besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, handheld computer, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the scope.

[0117] In this embodiment of the application, by setting the rectifier antenna mode of this embodiment on the electronic device, the rectifier antenna module can be used to simultaneously receive beam information and wirelessly charge.

[0118] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0119] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A rectifier antenna module, characterized in that, The application relates to an antenna module. The antenna module comprises N first antenna units, M second antenna units, a feeding module and a rectifying module. The M second antenna units are arranged at intervals and in an array, and 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 feeding module comprises a first feeding port and a second feeding port. The first feeding port is electrically connected with the N first antenna units and is used for providing equal-amplitude and equal-phase interval excitation signals to first antenna units arranged in sequence among the N first antenna units.

2. The rectenna module of claim 1, wherein, The second feeding port is electrically connected with the M second antenna units and is used for providing equal-amplitude and equal-phase excitation signals to the M second antenna units. The rectifying module is electrically connected with the M second antenna units.

3. The rectenna module of claim 1, wherein, The rectifying module comprises a capacitive isolator, a matching network, a rectifying diode, a harmonic suppression circuit and a direct-current filtering circuit. The first end of the capacitive isolator is electrically connected with the M second antenna units.

4. The rectenna module according to any one of claims 1 to 3, characterized in that, The second end of the capacitive isolator is electrically connected with the first end of the matching network. The second end of the matching network is electrically connected with the first end of the harmonic suppression circuit and the first end of the direct-current filtering circuit. The second end of the harmonic suppression circuit is electrically connected with the cathode of the rectifying diode. The anode of the rectifying diode is grounded.

5. The rectenna module of claim 4, wherein, The second end of the direct-current filtering circuit is grounded. The application further comprises a power divider module. The second feeding port is electrically connected with the M second antenna units through the power divider module.

6. The rectenna module of any one of claims 1 to 3, wherein, The application further comprises a first dielectric layer, a second dielectric layer and a ground layer. The ground layer is arranged 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 the surface of the first dielectric layer away from the second dielectric layer.

7. The rectenna module of any one of claims 1 to 3, wherein, The feeding module is arranged on the surface of the second dielectric layer away from the first dielectric layer. The first dielectric layer is provided with a first metal via hole. The second dielectric layer is provided with a second metal via hole. The ground layer is provided with a third metal via hole. The first metal via hole, the second metal via hole and the third metal via hole are coaxially arranged. The aperture of the third metal via hole is larger than the apertures of the first metal via hole and the second metal via hole. The first end of the first metal via hole is electrically connected with the N first antenna units. The second end of the first metal via hole is electrically connected with the first end of the second metal via hole after passing through the third metal via hole. The second end of the second metal via hole is electrically connected with the first feeding port. The first antenna unit is an L-shaped microstrip antenna unit, and L is an integer greater than or equal to 3. The side length of the first antenna unit is 0.3 lambda 1 to lambda 1. The second antenna unit is a rectangular microstrip antenna unit. The side length of the second antenna unit is 0.3 lambda 2 to lambda 2.

8. The rectenna module of any one of claims 1 to 3, wherein, The N first antenna units are arranged in an equidistant circular ring array, and a radius of the circular ring array is greater than or equal to 50 mm.

9. The rectenna module of any one of claims 1 to 3, wherein, The M second antenna units are arranged in an equidistant two-dimensional array, and a distance between any two adjacent second antenna units is greater than or equal to 10 mm.

10. The rectenna module of claim 2, wherein, The matching network comprises at least two microstrip lines connected in series.

11. The rectenna module of any one of claims 1 to 3, wherein, The first array antenna formed by the N first antenna units generates a vortex electromagnetic wave with a mode different from a mode of a beam generated by the second array antenna formed by the M second antenna units.

12. An electronic device, comprising: The electronic device comprises the rectenna module as claimed in any one of claims 1 to 11.

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