Millimeter wave antenna and communication device

Abstract

The invention provides a millimeter wave antenna and communication equipment, and relates to the technical field of millimeter wave antennas. In the millimeter wave antenna, the millimeter wave antenna comprises a grid array antenna layer, a Fabry-Perot antenna feed source layer and a micro-strip feed layer, the grid array antenna layer and the micro-strip feed layer are located on the two opposite sides of the Fabry-Perot antenna feed source layer respectively, and the Fabry-Perot antenna feed source layer comprises a first metal probe and a second metal probe. The first metal probe and the second metal probe are respectively connected to one side, close to the Fabry-Perot antenna feed source layer, of the grid array antenna layer, and the first metal probe and the second metal probe are respectively used as a differential feed structure and a probe feed structure of the grid array antenna layer; therefore, the resonance of the millimeter wave frequency band and the resonance of the sub-6GHz frequency band can be excited respectively. Based on the above content, the problem that effective cooperative work of the sub-6GHz frequency band and the millimeter wave frequency band is difficult in the prior art can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of millimeter wave antennas, and in particular to a millimeter wave antenna and communication equipment. Background Art

[0002] In recent years, due to current urbanization and population density, the development of 5G / 6G converged satellite internet communication technology has been listed as one of the top ten industrial technology challenges. In future communications technology, terrestrial networks will continue to primarily utilize the sub-6 GHz frequency band, focusing on key antenna performance parameters such as wide bandwidth, high gain, and dual-polarization. Building upon existing terrestrial network systems, these will be supplemented by communication equipment such as smart reflective surfaces and pico base stations. Satellite communications will also play a crucial role in next-generation mobile communication systems. However, satellite communications often face challenges such as atmospheric attenuation, transceiver / transmission / inter-regional isolation, and the Doppler effect. To address these challenges, terminal-layer antenna design methods that offer wide bandwidth, high gain, and both uplink and downlink heterocyclic polarization, as well as heterocyclic polarization across regions, are attracting significant attention. Therefore, designing antennas capable of operating effectively in both the sub-6 GHz and millimeter wave bands is of significant research significance. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a millimeter wave antenna and communication equipment to improve the problem in the prior art that the sub-6GHz frequency band and the millimeter wave frequency band are difficult to work together effectively.

[0004] To achieve the above objectives, this application adopts the following technical solutions: A millimeter wave antenna comprises a grid array antenna layer, a Fabry-Perot antenna feed layer, and a microstrip feed layer, wherein the grid array antenna layer and the microstrip feed layer are respectively located on opposite sides of the Fabry-Perot antenna feed layer. Among them, the Fabry-Perot antenna feed layer includes a first metal probe and a second metal probe, the first metal probe and the second metal probe are respectively connected to the side of the grid array antenna layer close to the Fabry-Perot antenna feed layer, and the first metal probe and the second metal probe serve as the differential feeding structure and probe feeding structure of the grid array antenna layer, respectively, to respectively excite the resonance of the millimeter wave frequency band and the resonance of the sub-6GHz frequency band, so that the millimeter wave antenna is used to work in conjunction with the sub-6GHz frequency band.

[0005] In a preferred embodiment of the present application, in the above-mentioned millimeter wave antenna, the grid array antenna layer includes: a first dielectric substrate layer; a grid array structure located on a side of the first dielectric substrate layer close to the Fabry-Perot antenna feed layer, wherein the first metal probe and the second metal probe are respectively connected to the grid array structure; A parasitic patch structure is located on a side of the first dielectric substrate layer away from the grid array structure, wherein the first dielectric substrate layer, the grid array structure and the parasitic patch structure serve as a partial reflection surface of the Fabry-Perot antenna feed layer.

[0006] In a preferred embodiment of the present application, in the above-mentioned millimeter wave antenna, a line connecting the geometric center of the grid array structure and the geometric center of the parasitic patch structure is parallel to the normal of the first dielectric substrate layer.

[0007] In a preferred embodiment of the present application, in the above-mentioned millimeter wave antenna, the Fabry-Perot antenna feed layer further includes: a second dielectric substrate layer; A floor layer is located on a side of the second dielectric substrate layer away from the grid array antenna layer, wherein the floor layer also serves as the floor layer of the microstrip feed layer, so that the Fabry-Perot antenna feed layer and the microstrip feed layer share the floor layer.

[0008] In a preferred embodiment of the present application, in the above-mentioned millimeter wave antenna, the microstrip feeding layer includes: a third dielectric substrate layer, wherein the third dielectric substrate layer is located on a side of the floor layer away from the second dielectric substrate layer; A first microstrip line, wherein the first microstrip line is located on a side of the third dielectric substrate layer away from the floor layer, and the first metal probe includes two differential probes, which respectively start from the grid array antenna layer, pass through the second dielectric substrate layer, the floor layer, and the third dielectric substrate layer in sequence, and extend to the first microstrip line to form a corresponding feeding structure.

[0009] In a preferred embodiment of the present application, in the above-mentioned millimeter wave antenna, the microstrip feeding layer further comprises: A second microstrip line, wherein the second microstrip line is located on a side of the third dielectric substrate layer away from the floor layer, and the second metal probe starts from the grid array antenna layer, passes through the second dielectric substrate layer, the floor layer and the third dielectric substrate layer in sequence, and extends to the second microstrip line to form a corresponding feeding structure.

[0010] In a preferred embodiment of the present application, in the above-mentioned millimeter wave antenna, the Fabry-Perot antenna feed layer further includes a first patch antenna structure, wherein the first patch antenna structure is located on a side of the second dielectric substrate layer close to the grid array antenna layer; The microstrip feed layer also includes a third microstrip line, wherein the third microstrip line is located on a side of the third dielectric substrate layer away from the floor layer, and the first patch antenna structure extends to the third microstrip line through a third metal probe that sequentially passes through the second dielectric substrate layer, the floor layer, and the third dielectric substrate layer, thereby forming a corresponding feeding structure.

[0011] In a preferred embodiment of the present application, in the above-mentioned millimeter wave antenna, the Fabry-Perot antenna feed layer further includes a second patch antenna structure and a metallized via, wherein the second patch antenna structure is located on a side of the second dielectric substrate layer close to the grid array antenna layer and is distributed between two differential probes included in the first metal probe, and one end of the metallized via is connected to the second patch antenna structure and the other end extends to a side of the second dielectric substrate layer close to the floor layer, and a slot structure is formed at a corresponding position on the floor layer; The microstrip feed layer also includes a fourth microstrip line, wherein the fourth microstrip line is located on a side of the third dielectric substrate layer away from the floor layer, and the second patch antenna structure forms a slot-coupled feeding structure of the fourth microstrip line through the metallized via and the slot structure.

[0012] In a preferred option of the present application, in the above-mentioned millimeter wave antenna, a line connecting the geometric center of the second patch antenna structure and the geometric center of the grid array structure included in the grid array antenna layer is parallel to the normal of the second dielectric substrate layer.

[0013] Based on the above, the present application further provides a communication device, including: The millimeter wave antenna mentioned above; A radio frequency signal processing device, wherein the radio frequency signal processing device is connected to the millimeter wave antenna and is used to receive and process the radio frequency signal received by the millimeter wave antenna or transmit and output the radio frequency signal to be transmitted through the millimeter wave antenna.

[0014] For the millimeter wave antenna and communication equipment provided in the present application, the millimeter wave antenna includes a grid array antenna layer, a Fabry-Perot antenna feed layer and a microstrip feed layer, and the grid array antenna layer and the microstrip feed layer are respectively located on opposite sides of the Fabry-Perot antenna feed layer: the Fabry-Perot antenna feed layer includes a first metal probe and a second metal probe, and the first metal probe and the second metal probe are respectively connected to the side of the grid array antenna layer close to the Fabry-Perot antenna feed layer, and the first metal probe and the second metal probe serve as the differential feeding structure and the probe feeding structure of the grid array antenna layer, respectively, to respectively excite the resonance of the millimeter wave band and the resonance of the sub-6GHz band. Based on the above content, since the resonance of the millimeter wave band and the resonance of the sub-6GHz band can be excited by the differential feeding structure and the probe feeding structure respectively, the millimeter wave antenna can work in conjunction with the millimeter wave band in the sub-6GHz band, and therefore, the problem in the prior art that the sub-6GHz band and the millimeter wave band are difficult to work effectively in conjunction can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings.

[0016] Figure 1 A schematic diagram of the structure of the millimeter wave antenna provided in an embodiment of the present application.

[0017] Figure 2 A top view of the grid array antenna layer provided in an embodiment of the present application.

[0018] Figure 3 A bottom view of the grid array antenna layer provided in an embodiment of the present application.

[0019] Figure 4 A top view of the feed layer of a Fabry-Perot antenna provided in an embodiment of the present application.

[0020] Figure 5 This is a bottom view of the microstrip feed layer provided in an embodiment of the present application.

[0021] Figure 6 This is a simulation curve diagram of the -10dB impedance bandwidth and gain variation with frequency of the millimeter wave antenna provided in an embodiment of the present application in the 2.26GHz~2.36GHz frequency band.

[0022] Figure 7 This is a simulation graph showing the -10dB impedance bandwidth and gain variation with frequency of the millimeter wave antenna provided in an embodiment of the present application in the 11.3GHz~11.5GHz frequency band.

[0023] Figure 8This is a simulation curve diagram of the -10dB impedance bandwidth and gain variation with frequency of the millimeter wave antenna provided in an embodiment of the present application in the 25.8GHz~27.7GHz frequency band.

[0024] Figure 9 This is a simulation curve diagram of the -10dB impedance bandwidth and gain variation with frequency of the millimeter wave antenna provided in an embodiment of the present application in the 38.1GHz~41.8GHz frequency band.

[0025] Figure 10 This is the simulated radiation pattern of the millimeter wave antenna provided in the embodiment of the present application at a frequency of 2.3 GHz.

[0026] Figure 11 This is the simulated radiation pattern of the millimeter wave antenna provided in the embodiment of the present application at a frequency of 11.4 GHz.

[0027] Icons: 1-first dielectric substrate layer; 2-parasitic patch structure; 3-grid array structure; 4-first metal probe; 5-second metal probe; 6-second dielectric substrate layer; 7-first patch antenna structure; 8-second patch antenna structure; 9-third dielectric substrate layer; 10-bottom layer; 11-fourth via; 12-first via; 13-second via; 14-third via; 15-slot structure; 16-third microstrip line; 17-first microstrip line; 18-second microstrip line; 19-quarter-wavelength impedance transformer; 20-fourth microstrip line; 21-third metal probe; 22-metallized via. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0030] like Figure 1-5As shown, an embodiment of the present application provides a millimeter wave antenna. The millimeter wave antenna may include a grid array antenna layer, a Fabry-Perot antenna feed layer, and a microstrip feed layer, wherein the grid array antenna layer and the microstrip feed layer are respectively located on opposite sides of the Fabry-Perot antenna feed layer. For example, Figure 1 In the figure, from top to bottom, there are the grid array antenna layer, the Fabry-Perot antenna feed layer and the microstrip feed layer.

[0031] In detail, the Fabry-Perot antenna feed layer may include a first metal probe 4 and a second metal probe 5. The first metal probe 4 and the second metal probe 5 are respectively connected to the side of the grid array antenna layer close to the Fabry-Perot antenna feed layer, and the first metal probe 4 and the second metal probe 5 serve as the differential feeding structure and the probe feeding structure of the grid array antenna layer, respectively, to respectively excite the resonance of the millimeter wave band and the resonance of the sub-6GHz band, so that the millimeter wave antenna is used to work in conjunction with the sub-6GHz band and the millimeter wave band. Specifically, the first metal probe 4 can serve as the differential feeding structure of the grid array antenna layer to excite the resonance of the millimeter wave band. The second metal probe 5 can serve as the probe feeding structure of the grid array antenna layer to excite the resonance of the sub-6GHz band. In other words, two resonance modes can be utilized to introduce sub-6GHz into the working frequency band of the antenna.

[0032] Based on the above content, since the resonance of the millimeter wave band and the resonance of the sub-6 GHz band can be stimulated by the differential feeding structure and the probe feeding structure respectively, the millimeter wave antenna can work in conjunction with the sub-6 GHz band and the millimeter wave band. Therefore, the problem in the existing technology that the sub-6 GHz band and the millimeter wave band are difficult to work effectively together can be improved.

[0033] First, it should be noted that the specific structure of the grid array antenna layer is not limited and can be selected according to actual needs.

[0034] For example, in an alternative embodiment, in order to provide high reflection coefficient and low phase gradient in two frequency bands and realize structural multiplexing in the millimeter wave antenna, the grid array antenna layer may include a first dielectric substrate layer 1, a parasitic patch structure 2 and a grid array structure 3.

[0035] Specifically, the grid array structure 3 can be located on the side of the first dielectric substrate layer 1 close to the Fabry-Perot antenna feed layer. Thus, the first metal probe 4 and the second metal probe 5 can be connected to the grid array structure 3, respectively. Furthermore, the parasitic patch structure 2 can be located on the side of the first dielectric substrate layer 1 away from the grid array structure 3. Thus, the first dielectric substrate layer 1, the grid array structure 3, and the parasitic patch structure 2 serve as partially reflective surfaces of the Fabry-Perot antenna feed layer, and the parasitic patch structure 2 is configured to provide a high reflection coefficient and a low phase gradient in the millimeter wave and sub-6 GHz frequency bands.

[0036] It can be understood that, in the grid array antenna layer, the relative distribution position between the grid array structure 3 and the parasitic patch structure 2 is also not restricted. For example, in an alternative embodiment, in order to make the formed reflection surface have a better reflection effect, the line connecting the geometric center of the grid array structure 3 and the geometric center of the parasitic patch structure 2 can be parallel to the normal of the first dielectric substrate layer 1.

[0037] In addition, it should be noted that the grid array structure 3 and the parasitic patch structure 2 can be printed on two opposite sides (or two surfaces) of the first dielectric substrate layer 1 respectively.

[0038] Secondly, it should be noted that the specific composition of the Fabry-Perot antenna feed layer is not limited and can be selected according to actual needs.

[0039] For example, in an alternative embodiment, in order to reduce the complexity of the structure, the Fabry-Perot antenna feed layer may include a second dielectric substrate layer 6 and a floor layer 10 .

[0040] Specifically, the floor layer may be located on a side of the second dielectric substrate layer 6 away from the grid array antenna layer. The floor layer also serves as the floor layer of the microstrip feed layer, so that the Fabry-Perot antenna feed layer and the microstrip feed layer share the same floor layer.

[0041] In addition, it should be noted that there is a certain distance between the first dielectric substrate layer 1 and the second dielectric substrate layer 6 , so that a certain cavity can be formed, thereby achieving resonance of electromagnetic waves.

[0042] Thirdly, it should be noted that the specific structure of the microstrip feeding layer is not limited and can be selected according to actual needs.

[0043] For example, in an alternative embodiment, the microstrip feed layer may include a third dielectric substrate layer 9 and a microstrip line. Specifically, the third dielectric substrate layer 9 may be located on a side of the floor layer away from the second dielectric substrate layer 6. The microstrip line may be located on a side of the third dielectric substrate layer 9 away from the floor layer.

[0044] It is understandable that the specific structure and distribution of the microstrip line are not limited.

[0045] For example, in an alternative embodiment, the microstrip feeding layer may include a first microstrip line 17. Specifically, the first microstrip line 17 is located on a side of the third dielectric substrate layer 9 away from the floor layer, and the first metal probe 4 includes two differential probes, each starting from the grid array antenna layer, sequentially passing through the second dielectric substrate layer 6, the floor layer, and the third dielectric substrate layer 9, and extending to the first microstrip line 17, forming a corresponding feeding structure. For example, the two differential probes may respectively pass through the first via 12 and the second via 13, sequentially passing through the second dielectric substrate layer 6, the floor layer, and the third dielectric substrate layer 9, and extending to the first microstrip line 17. In other words, the first microstrip line 17 can serve as a microstrip line structure for differential microstrip-to-coaxial differential feeding of the grid array structure 3 included in the grid array antenna layer.

[0046] In addition, the microstrip feeding layer may further include a quarter-wavelength impedance converter 19, which is connected to the first microstrip line 17. Thus, the first microstrip line 17 and the quarter-wavelength impedance converter 19 together serve as a differential microstrip to coaxial differential feeding microstrip line structure of the grid array structure 3 included in the grid array antenna layer.

[0047] For another example, in another alternative embodiment, the microstrip feed layer may further include a second microstrip line 18. Specifically, the second microstrip line 18 is located on a side of the third dielectric substrate layer 9 away from the floor layer, and the second metal probe 5 starts from the grid array antenna layer, sequentially passes through the second dielectric substrate layer 6, the floor layer, and the third dielectric substrate layer 9, and extends to the second microstrip line 18, forming a corresponding feeding structure. For example, the second metal probe 5 may pass through the second dielectric substrate layer 6, the floor layer, and the third dielectric substrate layer 9 through the third via 14, and extend to the second microstrip line 18. In other words, the second microstrip line 18 may serve as a microstrip-to-coaxial microstrip line structure of the grid array structure 3 included in the grid array antenna layer.

[0048] For another example, in a third alternative embodiment, the Fabry-Perot antenna feed layer may further include a first patch antenna structure 7, wherein the first patch antenna structure 7 is located on the side of the second dielectric substrate layer 6 close to the grid array antenna layer. Based on this, the microstrip feed layer may further include a third microstrip line 16. In detail, the third microstrip line 16 is located on the side of the third dielectric substrate layer 9 away from the floor layer, and the first patch antenna structure 7 extends to the third microstrip line 16 through a third metal probe 21 that sequentially passes through the second dielectric substrate layer 6, the floor layer, and the third dielectric substrate layer 9, thereby forming a corresponding feeding structure. For example, the third metal probe 21 may pass through the second dielectric substrate layer 6, the floor layer, and the third dielectric substrate layer 9 through a fourth via 11, and extend to the third microstrip line 16. In other words, the third microstrip line 16 can serve as a microstrip-to-coaxial feeding microstrip line structure for the first patch antenna structure 7.

[0049] For another example, in a fourth alternative embodiment, the Fabry-Perot antenna feed layer further includes a second patch antenna structure 8 and a metallized via 22. The second patch antenna structure 8 is located on the side of the second dielectric substrate layer 6 near the grid array antenna layer and is distributed between the two differential probes included in the first metal probe 4. Furthermore, one end of the metallized via 22 is connected to the second patch antenna structure 8, and the other end extends to the side of the second dielectric substrate layer 6 near the floor layer. A slot structure 15, such as a rectangular slot, is formed at a corresponding position on the floor layer. Based on this, the microstrip feed layer may further include a fourth microstrip line 20. Specifically, the fourth microstrip line 20 is located on the side of the third dielectric substrate layer 9 away from the floor layer, and the second patch antenna structure 8 forms a slot-coupled feed structure for the fourth microstrip line 20 through the metallized via 22 and the slot structure 15. In other words, the fourth microstrip line 20 can serve as a microstrip-to-slot feed microstrip line structure for the second patch antenna structure 8.

[0050] In addition, it should be noted that the line connecting the geometric center of the second patch antenna structure 8 and the geometric center of the grid array structure 3 included in the grid array antenna layer may be parallel to the normal of the second dielectric substrate layer 6 .

[0051] In addition, it should be noted that the first patch antenna structure 7 and the second patch antenna structure 8 can serve as 11.5 GHz and 26 GHz feed sources of the Fabry-Perot cavity feed layer, respectively.

[0052] In addition, it should be noted that the impedance of the first microstrip line 17 , the second microstrip line 18 , the third microstrip line 16 and the fourth microstrip line 20 may be 50Ω, and they may all be fed through SMA connectors.

[0053] In addition, if Figure 6 As shown, in the embodiment of the present application, based on the -10dB impedance bandwidth of the millimeter wave antenna in the 2.26GHz~2.36GHz frequency band and the simulation curve of the gain varying with frequency, it can be known that the relative center bandwidth of the millimeter wave antenna is 4.3%. In addition, if Figure 7 As shown, in the embodiment of the present application, based on the -10dB impedance bandwidth of the millimeter wave antenna in the 11.3GHz~11.5GHz frequency band and the simulation curve of the gain varying with frequency, it can be known that the relative center bandwidth of the millimeter wave antenna is 2%.

[0054] In addition, if Figure 8 As shown, in the embodiment of the present application, based on the -10dB impedance bandwidth of the millimeter wave antenna in the 25.8GHz~27.7GHz frequency band and the simulation curve of the gain varying with frequency, it can be known that the relative center bandwidth of the millimeter wave antenna is 7.2%.

[0055] In addition, if Figure 9 As shown, in the embodiment of the present application, based on the -10dB impedance bandwidth of the millimeter wave antenna in the 38.1GHz~41.8GHz frequency band and the simulation curve of the gain varying with frequency, it can be known that the relative center bandwidth of the millimeter wave antenna is 9.2%.

[0056] In addition, if Figure 10 As shown, in the embodiment of the present application, the millimeter wave antenna has a maximum gain of 7.1dBi at a frequency of 2.3GHz.

[0057] In addition, if Figure 11 As shown, in the embodiment of the present application, the millimeter wave antenna has a maximum gain of 11.0 dBi at a frequency of 11.4 GHz.

[0058] An embodiment of the present application further provides a communication device, wherein the communication device may include a radio frequency signal processing device and the millimeter wave antenna described above. Specifically, the radio frequency signal processing device is connected to the millimeter wave antenna and is configured to receive and process radio frequency signals received by the millimeter wave antenna or transmit radio frequency signals to be transmitted through the millimeter wave antenna.

[0059] In summary, the millimeter wave antenna and communication equipment provided by the present application, the millimeter wave antenna includes a grid array antenna layer, a Fabry-Perot antenna feed layer and a microstrip feed layer, the grid array antenna layer and the microstrip feed layer are respectively located on opposite sides of the Fabry-Perot antenna feed layer: the Fabry-Perot antenna feed layer includes a first metal probe 4 and a second metal probe 5, the first metal probe 4 and the second metal probe 5 are respectively connected to the side of the grid array antenna layer close to the Fabry-Perot antenna feed layer, and the first metal probe 4 and the second metal probe 5 respectively serve as the differential feeding structure and the probe feeding structure of the grid array antenna layer, so as to respectively excite the resonance of the millimeter wave band and the resonance of the sub-6GHz band. Based on the above content, since the resonance of the millimeter wave band and the resonance of the sub-6GHz band can be excited by the differential feeding structure and the probe feeding structure respectively, the millimeter wave antenna can work in conjunction with the millimeter wave band in the sub-6GHz band, therefore, the problem in the prior art that the sub-6GHz band and the millimeter wave band are difficult to work effectively in conjunction can be improved.

[0060] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A millimeter wave antenna, characterized in that: It includes a grid array antenna layer, a Fabry-Perot antenna feed layer and a microstrip feed layer, wherein the grid array antenna layer and the microstrip feed layer are respectively located on two opposite sides of the Fabry-Perot antenna feed layer. Among them, the Fabry-Perot antenna feed layer includes a first metal probe and a second metal probe, the first metal probe and the second metal probe are respectively connected to the side of the grid array antenna layer close to the Fabry-Perot antenna feed layer, and the first metal probe and the second metal probe serve as the differential feeding structure and probe feeding structure of the grid array antenna layer, respectively, to respectively excite the resonance of the millimeter wave frequency band and the resonance of the sub-6GHz frequency band, so that the millimeter wave antenna is used to work in conjunction with the sub-6GHz frequency band.

2. The millimeter wave antenna according to claim 1, wherein The grid array antenna layer includes: a first dielectric substrate layer; a grid array structure located on a side of the first dielectric substrate layer close to the Fabry-Perot antenna feed layer, wherein the first metal probe and the second metal probe are respectively connected to the grid array structure; A parasitic patch structure is located on a side of the first dielectric substrate layer away from the grid array structure, wherein the first dielectric substrate layer, the grid array structure and the parasitic patch structure serve as a partial reflection surface of the Fabry-Perot antenna feed layer.

3. The millimeter wave antenna according to claim 2, wherein: A line connecting the geometric center of the grid array structure and the geometric center of the parasitic patch structure is parallel to the normal of the first dielectric substrate layer.

4. The millimeter wave antenna according to any one of claims 1 to 3, characterized in that: The Fabry-Perot antenna feed layer further includes: a second dielectric substrate layer; A floor layer is located on a side of the second dielectric substrate layer away from the grid array antenna layer, wherein the floor layer also serves as the floor layer of the microstrip feed layer, so that the Fabry-Perot antenna feed layer and the microstrip feed layer share the floor layer.

5. The millimeter wave antenna according to claim 4, characterized in that The microstrip feeding layer comprises: a third dielectric substrate layer, wherein the third dielectric substrate layer is located on a side of the floor layer away from the second dielectric substrate layer; A first microstrip line, wherein the first microstrip line is located on a side of the third dielectric substrate layer away from the floor layer, and the first metal probe includes two differential probes, which respectively start from the grid array antenna layer, pass through the second dielectric substrate layer, the floor layer, and the third dielectric substrate layer in sequence, and extend to the first microstrip line to form a corresponding feeding structure.

6. The millimeter wave antenna according to claim 5, characterized in that The microstrip feed layer further includes: A second microstrip line, wherein the second microstrip line is located on a side of the third dielectric substrate layer away from the floor layer, and the second metal probe starts from the grid array antenna layer, passes through the second dielectric substrate layer, the floor layer and the third dielectric substrate layer in sequence, and extends to the second microstrip line to form a corresponding feeding structure.

7. The millimeter wave antenna according to claim 5, characterized in that The Fabry-Perot antenna feed layer further includes a first patch antenna structure, wherein the first patch antenna structure is located on a side of the second dielectric substrate layer close to the grid array antenna layer; The microstrip feed layer also includes a third microstrip line, wherein the third microstrip line is located on a side of the third dielectric substrate layer away from the floor layer, and the first patch antenna structure extends to the third microstrip line through a third metal probe that sequentially passes through the second dielectric substrate layer, the floor layer, and the third dielectric substrate layer, thereby forming a corresponding feeding structure.

8. The millimeter wave antenna according to claim 5, wherein: The Fabry-Perot antenna feed layer further includes a second patch antenna structure and a metallized via, wherein the second patch antenna structure is located on a side of the second dielectric substrate layer close to the grid array antenna layer and is distributed between two differential probes included in the first metal probe, and one end of the metallized via is connected to the second patch antenna structure and the other end extends to a side of the second dielectric substrate layer close to the floor layer, forming a slot structure at a corresponding position on the floor layer; The microstrip feed layer also includes a fourth microstrip line, wherein the fourth microstrip line is located on a side of the third dielectric substrate layer away from the floor layer, and the second patch antenna structure forms a slot-coupled feeding structure of the fourth microstrip line through the metallized via and the slot structure.

9. The millimeter wave antenna according to claim 8, characterized in that A line connecting the geometric center of the second patch antenna structure and the geometric center of the grid array structure included in the grid array antenna layer is parallel to the normal of the second dielectric substrate layer.

10. A communication device, characterized in that: include: The millimeter wave antenna according to any one of claims 1 to 9; A radio frequency signal processing device, wherein the radio frequency signal processing device is connected to the millimeter wave antenna and is used to receive and process the radio frequency signal received by the millimeter wave antenna or transmit and output the radio frequency signal to be transmitted through the millimeter wave antenna.

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