An antenna array and a communication device

Abstract

The embodiment of the application relates to the technical field of communication, and discloses an antenna array and a communication device, the antenna array comprises a bearing base body, a waveguide antenna unit, a choke component and a feeding structure, the waveguide antenna unit comprises a plurality of first antenna elements and a plurality of second antenna elements, the first antenna element comprises a first rectangular waveguide cavity and a first radiation aperture arranged on the first rectangular waveguide cavity, the second antenna element comprises a second rectangular waveguide cavity and a second radiation aperture arranged on the second rectangular waveguide cavity, and the choke component is arranged on the waveguide antenna unit. In the above manner, the embodiment of the application can effectively constrain electromagnetic waves to propagate in a specific path, can significantly improve energy transmission efficiency compared with an open radiation structure, effectively suppresses array interference, and provides a high-performance antenna for a 72-78 GHz frequency band communication system.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to an antenna array and a communication device. Background Technology

[0002] With the rapid development of applications such as 5G millimeter-wave communication, automotive radar, and satellite communication, the demand for high-frequency communication systems in the 72-78GHz band is increasing. As a key component of the radio frequency front end, antennas face severe technical challenges in this band.

[0003] In implementing the embodiments of this application, the inventors discovered that traditional microstrip antennas and patch antenna arrays generally suffer from insufficient gain in the millimeter-wave band. This is primarily because dielectric loss increases significantly with frequency, while radiation efficiency decreases. Furthermore, to obtain sufficient gain, traditional solutions often require large-scale array configurations, resulting in excessively large overall antenna sizes that fail to meet the compact design requirements of modern communication equipment. Utility Model Content

[0004] The main technical problem solved by the embodiments of this application is to provide an antenna array that, by setting waveguide antenna elements, can effectively constrain the propagation of electromagnetic waves within a specific path. Compared with open radiating structures, it can significantly improve energy transmission efficiency. Combined with the design of choke components, it can achieve high gain and miniaturization while effectively suppressing inter-array interference, providing a high-performance antenna for 72-78GHz band communication systems.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application embodiment is: providing an antenna array, including a carrier substrate, a waveguide antenna element, a choke assembly, and a feeding structure. The waveguide antenna element includes a plurality of first antenna elements and a plurality of second antenna elements, which are respectively disposed on both sides of the carrier substrate. The first antenna element includes a first rectangular waveguide cavity and a first radiating aperture disposed on the first rectangular waveguide cavity. The second antenna element includes a second rectangular waveguide cavity and a second radiating aperture disposed on the second rectangular waveguide cavity. The choke assembly is disposed on the waveguide antenna element, and the feeding structure is placed on the second surface of the carrier substrate. The feeding structure is used to provide signal feed to the waveguide antenna element.

[0006] Optionally, the number of the first radial openings is multiple, the number of the second radial openings is multiple, and the multiple first radial openings and the multiple second radial openings are arranged alternately.

[0007] Optionally, a plurality of first antenna elements are arranged along the width direction of the carrier substrate, and a plurality of second antenna elements are arranged along the width direction of the carrier substrate.

[0008] Optionally, the choke assembly includes a first choke slot and a second choke slot, wherein the first choke slot is disposed between adjacent first antenna elements and the second choke slot is disposed between adjacent second antenna elements.

[0009] Optionally, the first choke groove includes a plurality of parallel first choke strips, which are distributed at equal intervals along a preset direction.

[0010] Optionally, the spacing between adjacent first choke bars is less than half the operating wavelength of the antenna array.

[0011] Optionally, the second choke groove includes a plurality of parallel second choke bars, which are distributed at equal intervals along a preset direction.

[0012] Optionally, both the first choke groove and the second choke groove are rectangular annular grooves.

[0013] Optionally, the power supply structure includes a coaxial probe, which includes a core and an outer sheath. The core is used to transmit signals, and the outer sheath is grounded to the carrier substrate.

[0014] To solve the above-mentioned technical problems, another technical solution adopted in the embodiments of this application is to provide a communication device including any of the above-mentioned antenna arrays.

[0015] This application provides an antenna array including a carrier substrate, a waveguide antenna element, a choke assembly, and a feeding structure. The waveguide antenna element includes multiple first antenna elements and multiple second antenna elements, which are respectively disposed on both sides of the carrier substrate. The first antenna element includes a first rectangular waveguide cavity and a first radiating aperture disposed on the first rectangular waveguide cavity. The second antenna element includes a second rectangular waveguide cavity and a second radiating aperture disposed on the second rectangular waveguide cavity. The choke assembly is disposed on the waveguide antenna element, and the feeding structure is disposed on the second surface of the carrier substrate. The feeding structure is used to provide signal feed to the waveguide antenna element. By setting the waveguide antenna element, electromagnetic waves can be effectively constrained to propagate within a specific path. Compared with an open radiating structure, energy transmission efficiency can be significantly improved. Combined with the design of the choke assembly, high gain and miniaturization are achieved while effectively suppressing inter-array interference, providing a high-performance antenna for 72-78GHz band communication systems. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the antenna array according to an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the back of the antenna array according to an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the first antenna element according to an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the second antenna element in an embodiment of this application;

[0021] Figure 5 This is yet another schematic diagram of the antenna array according to an embodiment of this application;

[0022] Figure 6 This is an S11 parameter diagram of the first antenna element or the second antenna element in the embodiments of this application;

[0023] Figure 7 This is a VSWR curve of the antenna array according to an embodiment of this application;

[0024] Figure 8 This is the S11 curve diagram of the antenna array in the embodiment of this application.

[0025] The reference numerals in the detailed embodiments are as follows: 100, antenna array; 10, carrier substrate; 20, waveguide antenna element; 21, first antenna element; 201, first rectangular waveguide cavity; 202, first radiating aperture; 22, second antenna element; 221, second rectangular waveguide cavity; 222, second radiating aperture; 30, choke assembly; 31, first choke slot; 311, first choke bar; 32, second choke slot; 321, second choke bar; 40, feeding structure; 41, coaxial probe; 411, wire core; 412, outer sheath. Detailed Implementation

[0026] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0028] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0029] Please see Figure 1 and Figure 2 The antenna array 100 includes an antenna array 100, including a carrier substrate 10, a waveguide antenna element 20, a choke assembly 30, and a feeding structure 40.

[0030] The support substrate 10 is made of a highly conductive metal material, preferably aluminum alloy or copper alloy, which has good mechanical strength and electromagnetic shielding performance. The support substrate 10 has a rectangular plate structure, providing stable mechanical support and electrical connection foundation for the antenna array 100. The support substrate 10 has a first surface and a second surface. The first surface is used to mount the waveguide antenna element 20, and the second surface is used to set the feed structure 40.

[0031] The waveguide antenna element 20 constitutes the core radiating part of the antenna array 100, including multiple first antenna elements 21 and multiple second antenna elements 22. The first antenna elements 21 and second antenna elements 22 are respectively disposed on opposite sides of the supporting substrate 10, forming a dual-sided radiating configuration, which can effectively improve the space utilization efficiency of the antenna array 100. The first antenna element 21 includes a first rectangular waveguide cavity 201, the interior of which forms a closed rectangular cross-section waveguide channel. The cross-sectional dimensions of the first rectangular waveguide cavity 201 are optimized according to the waveguide transmission characteristics of the 72-78GHz operating frequency band to ensure stable transmission in TE10 mode. A first radiating aperture 202 is provided on the upper surface of the first rectangular waveguide cavity 201. The size and position of the first radiating aperture 202 have been optimized through electromagnetic simulation to achieve optimal radiation efficiency and radiation pattern characteristics. The structure of the second antenna element 22 corresponds to that of the first antenna element 21; please refer to [link to relevant documentation]. Figure 4 The second antenna element 22 includes a second rectangular waveguide cavity 221 and a second radiating aperture 222 disposed thereon. The second rectangular waveguide cavity 221 has the same basic structural parameters as the first rectangular waveguide cavity 201, ensuring the consistency of the radiation characteristics of the antenna array 100. The design parameters of the second radiating aperture 222 are coordinated with those of the first radiating aperture 202, together forming the overall radiating unit of the array.

[0032] Please combine Figure 6 , Figure 6 The diagram shows the S11 parameters of either the first antenna element 21 or the second antenna element 22. Analysis of the test data shows that either the first antenna element 21 or the second antenna element 22 exhibits excellent matching characteristics within the 72-78 GHz operating frequency band, with the S11 parameters remaining below -15 dB within the target frequency band. Specifically, at the two key frequency points of 74 GHz and 77 GHz, the S11 parameters reach excellent levels of -18.5 dB and -16.8 dB, respectively, corresponding to reflected power of only 1.4% and 2.1%, indicating efficient impedance matching between the antenna and the feeding system. The frequency response curve exhibits broadband characteristics, with a bandwidth exceeding 6 GHz, meeting the application requirements of broadband millimeter-wave communication systems. The frequency stability of the S11 parameters reflects the engineering maturity of the antenna design. Throughout the entire operating frequency band, parameter fluctuations are controlled within ±2 dB, ensuring stable performance of the system at different operating frequencies. This broadband matching characteristic provides an important technical foundation for multi-band applications and frequency-agile systems.

[0033] The choke component 30 is disposed in the waveguide antenna element 20, and its main function is to suppress electromagnetic coupling between adjacent antenna elements and reduce inter-array interference. In this embodiment, the choke component 30 adopts a metal groove structure, which is formed by machining a groove structure of specific depth and width on the supporting substrate 10. The design frequency of the choke component 30 is matched with the antenna operating frequency band, providing effective electromagnetic isolation performance in the 72-78GHz range. Preferably, the depth of the choke component 30 is typically one-quarter of the operating wavelength, and the width is optimized and adjusted according to the isolation requirements. The introduction of the choke component 30 significantly improves the port isolation of the antenna array 100 and enhances the overall radiation performance.

[0034] The feed structure 40 is disposed on the second surface of the carrier substrate 10 and is responsible for providing RF signal feed to the waveguide antenna element 20. The feed structure 40 adopts a back-fed design, establishing an electromagnetic coupling connection with the inside of the waveguide cavity through a feed hole on the carrier substrate 10. The design of the feed structure 40 ensures good impedance matching and efficient power transmission, achieving low reflection loss within the operating frequency band. The specific layout of the feed structure 40 is designed according to the port configuration requirements of the antenna array 100, supporting single-port or multi-port feeding methods. The selection of the feed location is optimized through electromagnetic simulation to ensure uniform power distribution and phase relationship for each antenna element.

[0035] Please combine Figure 7 , Figure 7 The VSWR curve of antenna array 100 provides an intuitive evaluation of its matching performance; a VSWR value closer to 1 indicates superior matching performance. Test results show that antenna array 100 exhibits excellent VSWR performance in the 72-81 GHz band, with the optimal operating point at 74.44606 GHz, where the VSWR value is only 1.05674, close to ideal matching. The overall trend of the VSWR curve shows typical resonance characteristics, achieving optimal matching at the center frequency band and gradually deteriorating towards both ends while remaining within an acceptable range. Throughout the entire 72-78 GHz target frequency band, the VSWR value remains below 1.5, corresponding to a reflection loss of less than 0.18 dB, ensuring high power transmission efficiency. VSWR performance at the band edges is equally important; the VSWR value at 78 GHz is approximately 1.35, and at 72 GHz it is approximately 1.42, indicating that antenna array 100 possesses good band edge characteristics. This performance distribution provides ample design margin for system frequency planning and channel configuration, supporting flexible frequency resource allocation strategies.

[0036] The antenna array 100 structure in this embodiment effectively constrains the electromagnetic wave propagation path through the closed boundary characteristics of the waveguide antenna element 20, significantly improving energy transmission efficiency compared to an open radiating structure. The configuration of the choke component 30 effectively suppresses inter-array interference, improving antenna isolation and radiation performance. The overall structure achieves the design goals of high gain and miniaturization in the 72-78GHz frequency band, providing a high-performance antenna solution for millimeter-wave communication systems.

[0037] Please reconsider. Figure 3 and Figure 4 The first antenna element 21 has multiple first radiating openings 202 on its first rectangular waveguide cavity 201. The number of openings is determined according to the waveguide cavity size and radiation performance requirements, preferably 3-5 openings. The first radiating openings 202 are evenly spaced along the length of the waveguide cavity, with a spacing designed to be half a waveguide wavelength to ensure in-phase excitation and maximum radiation efficiency. Each first radiating opening 202 adopts a rectangular or elliptical geometry. Furthermore, the second antenna element 22 has multiple second radiating openings 222, whose number, size, and distribution are consistent with the first radiating openings 202 to ensure symmetry and power balance in bilateral radiation. The design parameters of the second radiating openings 222 are coordinated and optimized with those of the first radiating openings 202 to achieve a consistent radiation pattern for the entire array. The multiple first radiating openings 202 and the multiple second radiating openings 222 are arranged in an alternating pattern, forming a spatially staggered distribution. In the specific implementation, the first set of radiating apertures 202 and the second set of radiating apertures 222 are offset by half a period within the plane of the supporting substrate 10, so that the first radiating aperture 202 is located at the gap position of the second radiating aperture 222. This staggered arrangement design can effectively reduce the direct electromagnetic coupling between adjacent first radiating apertures 202 and second radiating apertures 222, and reduce the level of mutual interference. At the same time, the staggered configuration increases the spatial sampling density of the antenna array 100, improves the sidelobe characteristics of the far-field radiation pattern, and enhances the gain and directivity of the antenna array 100. The offset distance of the staggered arrangement is determined through electromagnetic simulation optimization, with a typical value of one-quarter waveguide wavelength.

[0038] In this embodiment, multiple first antenna elements 21 are linearly arranged along the width of the carrier substrate 10 to form an array of first antenna elements 21. The spacing between the antenna elements is designed to be 0.6-0.8 times the free space wavelength, achieving a compact layout while avoiding grating lobe effects. Multiple second antenna elements 22 are also arranged along the width of the carrier substrate 10, forming a parallel configuration with the array of first antenna elements 21. The spacing and number of the second antenna elements 22 are consistent with those of the first antenna elements 21, ensuring the electrical symmetry of the two arrays. The two arrays are electromagnetically isolated through the central region of the carrier substrate 10, where additional shielding structures can be installed to further improve the isolation.

[0039] In this embodiment, by employing an alternating design of multiple first radiating apertures 202 and multiple second radiating apertures 222, the radiation efficiency of the antenna array 100 is improved compared to a single-aperture configuration, while simultaneously enhancing the symmetry of the far-field radiation pattern and sidelobe suppression characteristics. The array layout in the width direction enables beamforming, allowing the desired beam pointing and shape to be obtained by adjusting the excitation amplitude and phase of each element. The alternating arrangement significantly reduces the electromagnetic coupling level within the array, improves port isolation, and enhances the stability and reliability of the antenna array 100. The overall structure maintains a compact size while achieving superior electromagnetic performance and more flexible application adaptability.

[0040] In this embodiment, the waveguide antenna unit 20 adopts a compact structural design. The individual first antenna element 21 and second antenna element 22 are small in size and are arranged in an array by staggering. While achieving high gain, the overall size of the antenna array 100 is effectively reduced, which meets the miniaturization requirements of modern communication equipment and is easy to integrate into various compact electronic devices.

[0041] Please see Figure 5 The choke assembly 30 includes a first choke slot 31 and a second choke slot 32. The first choke slot 31 is disposed between adjacent first antenna elements 21 to form an electromagnetic isolation barrier. In this embodiment, the first choke slot 31 adopts a slot-shaped structure, and the slot depth is designed to be one-quarter of the wavelength corresponding to the center frequency of the antenna array 100's operating frequency band, ensuring optimal electromagnetic suppression within the 72-78GHz frequency band. Furthermore, the second choke slot 32 is disposed between adjacent second antenna elements 22, and its structural parameters and design principles are consistent with those of the first choke slot 31. The second choke slot 32 and the first choke slot 31 correspond to each other in spatial position, forming a symmetrical isolation structure layout. Through the synergistic effect of the two choke slots, mutual interference within the arrays of the first antenna elements 21 and the second antenna elements 22 is effectively suppressed. The processing precision requirements of the second choke slot 32 are the same as those of the first choke slot 31, ensuring that the two choke slot systems have consistent electromagnetic characteristics and isolation performance.

[0042] For further information, please refer to [link / reference]. Figure 5The first choke slot 31 includes multiple parallel-arranged first choke bars 311, forming a periodic electromagnetic suppression structure. The multiple first choke bars 311 are evenly spaced along a predetermined direction, which is typically parallel to the arrangement direction of the first antenna elements 21. The number of first choke bars 311 is determined based on the choke slot length and spacing requirements; the evenly spaced distribution ensures the uniformity of the choking effect and the consistency of electromagnetic performance. The spacing between adjacent first choke bars 311 is controlled at half the operating wavelength of the antenna array 100; the specific value is determined through electromagnetic simulation analysis. This configuration effectively prevents the excitation and propagation of higher-order modes, maintaining the fundamental mode characteristics of the electromagnetic field inside the first choke slot 31. Simultaneously, the dense arrangement of the first choke bars 311 enhances the suppression capability of surface waves, further improving the isolation between the multiple first antenna elements 21.

[0043] The second choke slot 32 also includes multiple parallel-arranged second choke bars 321, whose structural parameters and distribution are consistent with the first choke bar 311. The multiple second choke bars 321 are evenly spaced along a preset direction, which is parallel to the arrangement direction of the second antenna element 22. The spacing of the second choke bars 321 follows the same principle as the first choke bar 311, and the spacing design of the second choke bars 321 also meets the requirement of being less than half the operating wavelength, ensuring that the second choke slot 32 has the same electromagnetic suppression performance as the first choke slot 31. In this embodiment, the isolation between adjacent first antenna elements 21 or second antenna elements 22 is improved.

[0044] In the embodiments of the application, both the first choke slot 31 and the second choke slot 32 adopt an overall rectangular annular slot configuration, forming a closed electromagnetic suppression structure. The rectangular annular slot consists of an outer rectangular slot body and an inner rectangular island structure, with a continuous annular gap between them. The width of the annular gap is designed to be one-quarter of the waveguide wavelength corresponding to the operating frequency band, ensuring electromagnetic short-circuit characteristics at the target frequency. The closed structure of the rectangular annular slot provides stronger electromagnetic isolation capability than traditional open choke slots. The annular structure forms a continuous electromagnetic barrier around adjacent antenna elements, effectively blocking the propagation path of surface waves. The electromagnetic field inside the annular gap forms a standing wave distribution at a specific frequency, achieving efficient reflection and suppression of coupled signals. The closed design also has better frequency selectivity characteristics, providing high isolation within the operating frequency band while minimizing the impact on the radiation performance of the antenna array 100. The geometric parameters of the rectangular annular slot can be adjusted according to different application requirements to achieve an optimized balance between isolation and bandwidth characteristics.

[0045] In this embodiment, the cooperative configuration of the first choke slot 31 and the second choke slot 32 achieves comprehensive electromagnetic isolation on both sides of the antenna array 100. The two choke slot systems correspond to each other spatially, forming a symmetrical isolation structure layout. Through the synergistic effect of the dual-side isolation, cross-coupling between the first antenna element array 21 and the second antenna element array 22 is effectively suppressed. The dual choke slot system also provides redundant isolation protection; even if the performance of a single choke slot changes due to manufacturing errors or environmental factors, the other choke slot can still maintain basic isolation functionality. This design improves the stability and reliability of the antenna system, and is particularly suitable for applications with stringent electromagnetic compatibility requirements.

[0046] Please refer to section 2. The number of feed structures 40 corresponds to the configuration of waveguide antenna elements 20. Each first antenna element 21 and second antenna element 22 is equipped with an independent feed structure 40. Multiple feed structures 40 are uniformly arranged on the second surface of the supporting substrate 10, forming a regular array layout. The position of the feed structure 40 on the second surface precisely corresponds to the position of the corresponding waveguide antenna element 20 on the first surface, and electromagnetic connection is established through feed vias inside the supporting substrate 10. The spacing of the feed structures 40 is consistent with the spacing of the antenna elements to ensure geometric symmetry and electrical consistency of the layout. Each feed structure 40 is connected to the corresponding waveguide cavity through an independent feed channel to avoid feed crosstalk between different antenna elements. The feed channel adopts a circular aperture design, and the aperture diameter is determined according to the outer diameter of the coaxial probe 41 and impedance matching requirements. The feed via penetrates the full thickness of the supporting substrate 10, and the inner wall surface is precision machined and surface treated to ensure good electrical connection performance.

[0047] Specifically, the coaxial probe 41 adopts a standard coaxial transmission line structure, including a central conductor core 411 and an outer conductor sheath 412. The core 411 is made of a highly conductive metal material, preferably gold-plated copper or silver, to ensure low-loss transmission characteristics within the operating frequency band. The surface of the core 411 is polished, with surface roughness controlled at the nanometer level to minimize high-frequency transmission loss. The sheath 412 adopts a concentric cylindrical structure. The sheath 412 is made of a highly conductive metal, and its outer diameter is determined according to the size of the feed via, ensuring a reliable mechanical connection with the carrier substrate 10 while guaranteeing impedance matching. The core 411, as the inner conductor of the coaxial probe 41, undertakes the function of transmitting radio frequency signals. The signal enters the core 411 from an external radio frequency source through a coaxial connector and propagates along the coaxial transmission line to the probe tip. At the probe tip, the core 411 establishes a coupling connection with the electromagnetic field inside the waveguide cavity, efficiently injecting the transmitted power into the waveguide mode. The outer sheath 412 of the coaxial probe 41 establishes a reliable electrical connection with the carrier substrate 10, achieving the continuity of the radio frequency ground and electromagnetic shielding function. The outer sheath 412 is connected to the carrier substrate 10 by mechanical crimping or welding, and the connection interface uses conductive adhesive or conductive gaskets to ensure low-impedance contact. The DC resistance of the grounding connection is controlled at the milliohm level, and the radio frequency impedance maintains a low value characteristic within the operating frequency band.

[0048] Please combine Figure 8 , Figure 8 The S11 curve of antenna array 100 illustrates the impact and optimization effect of array design on element matching performance. Compared to a single first antenna element 21 or a second antenna element 22, antenna array 100 achieves further improvement in matching performance through electromagnetic coupling and complementary effects between array elements. Test data shows that the S11 parameters of antenna array 100 reach an excellent level of over -22dB at key frequency points. The performance improvement brought about by array design is mainly reflected in two aspects: bandwidth expansion and matching depth improvement. The operating bandwidth of antenna array 100 is expanded by approximately 15% compared to a single first antenna element 21 or a second antenna element 22, while the matching depth in the center frequency band is improved by 3-5dB. This improvement stems from the mutual coupling effect between array elements and the synergistic effect of the choke structure, achieving impedance characteristic optimization through reasonable element spacing and choke design.

[0049] This application provides an antenna array 100, including a carrier substrate 10, a waveguide antenna element 20, a choke assembly 30, and a feeding structure 40. The waveguide antenna element 20 includes a plurality of first antenna elements 21 and a plurality of second antenna elements 22. The plurality of first antenna elements 21 and the plurality of second antenna elements 22 are respectively disposed on both sides of the carrier substrate 10. The first antenna element 21 includes a first rectangular waveguide cavity 201 and a first radiation opening 202 disposed on the first rectangular waveguide cavity 201. The second antenna element 22 includes a second rectangular waveguide cavity 221 and a second radiation opening 202 disposed on the first rectangular waveguide cavity 201. The second radiating aperture 222 is on the two rectangular waveguide cavities 221. The choke component 30 is disposed on the waveguide antenna unit 20. The feeding structure 40 is placed on the second surface of the supporting substrate 10. The feeding structure 40 is used to provide signal feed to the waveguide antenna unit 20. By setting the waveguide antenna unit 20, the propagation of electromagnetic waves can be effectively constrained in a specific path. Compared with the open radiating structure, the energy transmission efficiency can be significantly improved. Combined with the design of the choke component 30, high gain and miniaturization are achieved while effectively suppressing inter-array interference, providing a high-performance antenna for the 72-78GHz band communication system.

[0050] This application also provides embodiments of communication devices, including the above-described embodiments of the antenna array 100. For specific implementation details, please refer to the above-described embodiments of the antenna array 100.

[0051] Further details will not be elaborated here. The above descriptions are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An antenna array, characterized in that, include: Supporting substrate; A waveguide antenna unit includes multiple first antenna elements and multiple second antenna elements. The multiple first antenna elements and multiple second antenna elements are respectively disposed on both sides of the carrier substrate. The first antenna element includes a first rectangular waveguide cavity and a first radiating opening disposed on the first rectangular waveguide cavity. The second antenna element includes a second rectangular waveguide cavity and a second radiating opening disposed on the second rectangular waveguide cavity. A choke assembly is disposed in the waveguide antenna unit; A power feeding structure is disposed on the second surface of the carrier substrate, and the power feeding structure is used to provide signal power to the waveguide antenna element.

2. The antenna array according to claim 1, characterized in that, The number of first radial openings is multiple, the number of second radial openings is multiple, and the multiple first radial openings and multiple second radial openings are arranged alternately.

3. The antenna array according to claim 1, characterized in that, A plurality of first antenna elements are arranged along the width direction of the carrier substrate, and a plurality of second antenna elements are arranged along the width direction of the carrier substrate.

4. The antenna array according to claim 1, characterized in that, The choke assembly includes a first choke slot and a second choke slot, wherein the first choke slot is disposed between adjacent first antenna elements and the second choke slot is disposed between adjacent second antenna elements.

5. The antenna array according to claim 4, characterized in that, The first choke groove includes a plurality of parallel first choke strips, which are distributed at equal intervals along a preset direction.

6. The antenna array according to claim 5, characterized in that, The spacing between adjacent first choke bars is less than half the operating wavelength of the antenna array.

7. The antenna array according to claim 4, characterized in that, The second choke groove includes a plurality of parallel second choke bars, which are distributed at equal intervals along a preset direction.

8. The antenna array according to claim 4, characterized in that, Both the first choke groove and the second choke groove are rectangular annular grooves.

9. The antenna array according to claim 1, characterized in that, The power supply structure includes a coaxial probe, which includes a core and an outer sheath. The core is used to transmit signals, and the outer sheath is grounded to the carrier substrate.

10. A communication device, characterized in that, Including the antenna array as described in any one of claims 1-9.

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