CN115101914B - Cavity antenna array with low profile and flexible caliber - Google Patents
Cavity antenna array with low profile and flexible caliber Download PDFInfo
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- CN115101914B CN115101914B CN202210755477.5A CN202210755477A CN115101914B CN 115101914 B CN115101914 B CN 115101914B CN 202210755477 A CN202210755477 A CN 202210755477A CN 115101914 B CN115101914 B CN 115101914B
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- 239000002184 metal Substances 0.000 claims abstract description 42
- 230000005855 radiation Effects 0.000 claims abstract description 39
- 230000010287 polarization Effects 0.000 claims description 78
- 238000006243 chemical reaction Methods 0.000 claims description 65
- 230000008878 coupling Effects 0.000 claims description 26
- 238000010168 coupling process Methods 0.000 claims description 26
- 238000005859 coupling reaction Methods 0.000 claims description 26
- 230000009977 dual effect Effects 0.000 claims description 13
- 230000003071 parasitic effect Effects 0.000 claims description 11
- 238000013461 design Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005388 cross polarization Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
- H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
- H01P5/103—Hollow-waveguide/coaxial-line transitions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
- H01Q15/242—Polarisation converters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a resonant cavity, wherein the inner wall of the bottom of the resonant cavity is provided with a first metal ridge, the top of the resonant cavity is provided with a radiation slit, and the radiation slit extends parallel to the first metal ridge; by adding the metal ridge in the resonant cavity, the wavelength of the waveguide structure can be effectively adjusted, so that the dimension of the antenna in the two-dimensional direction can be flexibly designed, the antenna is not limited, and the flexible caliber of the antenna is realized. The invention also provides a cavity antenna array with a low profile and flexible caliber.
Description
Technical Field
The invention relates to the technical field of antenna arrays, in particular to a cavity antenna array with a low profile and flexible caliber and a resonant cavity thereof.
Background
In the field of aerospace military communication, the antenna is a key component, the working environment is complex and changeable, and the requirements on the processing precision and reliability of the antenna are high. Among the antenna forms, the waveguide cavity antenna is distinguished by the characteristics of compact structure, light weight, small volume, large power capacity, high caliber efficiency, easy realization of low side lobe, narrow beam and the like.
In addition, the circular polarized antenna is used in communication, so that cloud and rain interference can be prevented, and circular polarized waves can show great advantages in a frequency band with obvious path loss and higher Ka; in electronic countermeasure, the circularly polarized antenna can detect and interfere various linear polarized waves and elliptical polarized waves of enemy; circular polarized antennas are installed on severely swinging or rolling aircraft to capture information even in harsh environments.
Therefore, the circularly polarized antenna based on the waveguide cavity structure has great application potential in the field of aerospace military communication. In the prior art, chinese patent application nos. CN200910185457.3, zhang Hongtao, wang Wei, et al disclose a circularly polarized antenna based on a four-ridge waveguide, which is composed of a feed waveguide, a coupling slot, and a four-ridge circular polarizer, and has the capability of performing circularly polarized radiation in an operating band. However, this circularly polarized antenna has several disadvantages: first, the circularly polarized antenna is provided with a circularly polarizer through a feed waveguide, so that the antenna section is relatively high. In addition, the circularly polarized waveguide antenna can only generate single circular polarization (left-hand circular polarization or right-hand circular polarization), does not have the capacity of polarization multiplexing, and has limited system communication capacity. In addition, according to the design principle of the antenna in the invention, the dimensions of the antenna in two dimensions are related to each other, so that the size of the antenna aperture is inflexible, and the antenna cannot meet the requirements in the case of strict requirements on the antenna aperture in specific engineering application. The reason for this is that the waveguide wavelength is limited by the waveguide width, so that once the waveguide width is fixed, that waveguide wavelength cannot be changed. So that the antenna aperture cannot be flexibly changed in two dimensions.
Disclosure of Invention
In order to solve the technical problems in the background technology, the invention provides a cavity antenna array with a low profile and flexible caliber and a resonant cavity thereof.
The invention provides a resonant cavity, wherein the inner wall of the bottom of the resonant cavity is provided with a first metal ridge, the top of the resonant cavity is provided with a radiation slit, and the radiation slit extends parallel to the first metal ridge.
Preferably, the resonant cavity comprises a lower shell and an upper shell, the lower shell is provided with a plurality of first metal ridges which are sequentially arranged in parallel, the upper shell is provided with a plurality of groups of radiation slits, each group of radiation slits is correspondingly arranged with one first metal ridge, and each group of radiation slits are sequentially distributed along the length direction.
In the invention, the inner wall of the bottom of the resonant cavity is provided with a first metal ridge, and the top of the resonant cavity is provided with a radiation slit which extends in parallel with the first metal ridge; by adding the metal ridge in the resonant cavity, the wavelength of the waveguide structure can be effectively adjusted, so that the dimension of the antenna in the two-dimensional direction can be flexibly designed, the antenna is not limited, and the flexible caliber of the antenna is realized.
The invention also provides a cavity antenna array with low profile and flexible caliber, which comprises: the device comprises a feed waveguide, a polarization conversion microstrip board, a coaxial waveguide converter and the resonant cavity;
the feed waveguide is internally provided with a conducting channel, the top of the conducting channel is provided with a coupling slot extending along the inner wall of the conducting channel, the bottom of the resonant cavity is provided with an opening corresponding to the coupling slot, the first metal ridge is perpendicular to the extending direction of the conducting channel, the polarization conversion microstrip board is positioned above the resonant cavity, and the coaxial waveguide converter is connected with one end of the conducting channel.
Preferably, the top of the conduction channel is provided with a plurality of coupling slits which are distributed in sequence, and each first metal ridge is arranged corresponding to one coupling slit.
Preferably, the conductive via bottom has a second metal ridge extending along its length.
Preferably, the polarization conversion microstrip board is provided with a dual polarization conversion patch, and the polarization conversion microstrip board is provided with a rotating shaft which is vertically arranged and is rotatably arranged on the resonant cavity through the rotating shaft.
Preferably, the polarization conversion microstrip board is provided with a plurality of dual polarization conversion patches which are uniformly and equidirectionally distributed.
Preferably, the polarization conversion microstrip board comprises an upper board body and a lower board body, the dual polarization conversion patch is located on the lower board body, a parasitic second microstrip board which is correspondingly arranged with the dual polarization conversion patch is located above the first microstrip board, and a parasitic unit which is correspondingly arranged with the dual polarization conversion patch is arranged on the second microstrip board.
Preferably, the top of the resonant cavity has a locating protrusion for locating the edge of the polarization-converting microstrip board.
Preferably, the polarization conversion microstrip board has a square structure, and the dual polarization conversion patch has a cross structure, the long diameter direction of which is arranged along the diagonal direction of the polarization conversion microstrip board. In the invention, the cavity antenna array with low profile and flexible caliber is provided,
in the invention, a conducting channel is arranged in a feed waveguide, a coupling slot extending along the inner wall of the conducting channel is arranged at the top of the conducting channel, an opening corresponding to the coupling slot is arranged at the bottom of a resonant cavity, a first metal ridge is arranged perpendicular to the extending direction of the conducting channel, a polarization conversion microstrip board is arranged above the resonant cavity, and a coaxial waveguide converter is connected at one end of the conducting channel. The metal ridge is added in the resonant cavity, so that the guided wave length of the waveguide structure can be effectively adjusted, meanwhile, the section height of the antenna is effectively reduced through the design of the microstrip board, the feed waveguide is connected with the resonant cavity through the coupling slot, and the radiation slot is formed in the top of the resonant cavity so that energy is transmitted to the top-layer polarization conversion microstrip board, and circular polarization radiation is achieved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a resonant cavity according to the present invention.
Fig. 2 is a schematic diagram of the overall structure of an embodiment of a cavity antenna array with a low profile and flexible caliber according to the present invention.
Fig. 3 is an exploded view of one embodiment of a low profile flexible caliber cavity antenna array according to the present invention.
Fig. 4 is a schematic structural diagram of a polarization conversion microstrip board according to an embodiment of a cavity antenna array with a low profile and flexible caliber according to the present invention.
Fig. 5 is a schematic diagram of a polarization-converting microstrip board in a left-hand circular polarization mode in an embodiment of a cavity antenna array with a low profile and flexible caliber according to the present invention.
Fig. 6 is a schematic diagram of a polarization-switching microstrip board in a right-hand circular polarization mode in an embodiment of a cavity antenna array with a low-profile and flexible caliber according to the present invention.
Fig. 7 is a schematic structural diagram of a coaxial waveguide converter according to an embodiment of a low profile flexible caliber cavity antenna array according to the present invention.
Fig. 8 is another schematic structural diagram of a coaxial waveguide converter according to an embodiment of a low profile flexible caliber cavity antenna array according to the present invention.
Fig. 9 is a diagram of a radiation characteristic of a center frequency point of an embodiment of a cavity antenna array with a low profile and flexible caliber according to the present invention.
Detailed Description
As shown in fig. 1 to 9, fig. 1 is a schematic structural view of an embodiment of a resonant cavity according to the present invention, fig. 2 is a schematic structural view of an embodiment of a cavity antenna array according to the present invention with a low-profile flexible aperture, fig. 3 is an exploded schematic view of an embodiment of a cavity antenna array according to the present invention with a low-profile flexible aperture, fig. 4 is a schematic structural view of a polarization conversion microstrip board according to an embodiment of a cavity antenna array with a low-profile flexible aperture according to the present invention, fig. 5 is a schematic view of a polarization conversion microstrip board in an embodiment of a cavity antenna array with a low-profile flexible aperture according to the present invention with a left-handed circular polarization mode, fig. 6 is a schematic view of a polarization conversion microstrip board in an embodiment of a cavity antenna array with a low-profile flexible aperture according to the present invention with a right-handed circular polarization mode, fig. 7 is a schematic structural view of a coaxial waveguide converter in an embodiment of a cavity antenna array with a low-profile flexible aperture according to the present invention, fig. 8 is a schematic structural view of a coaxial waveguide converter in an embodiment of a cavity antenna array with a low-profile flexible aperture according to the present invention with another embodiment of a low-profile flexible aperture according to the present invention with a low-profile flexible aperture, and fig. 9 is a schematic view of a coaxial waveguide in an embodiment of a antenna array with a low-profile flexible antenna array with a flexible aperture according to the present invention.
Referring to fig. 1, the invention provides a resonant cavity, wherein the inner wall of the bottom of the resonant cavity is provided with a first metal ridge 302, the top of the resonant cavity is provided with a radiation slit 403, and the radiation slit 403 extends parallel to the first metal ridge 302. The metal ridge is designed in the resonant cavity to adjust the guided wave length of the resonant cavity, so that the dimension of the resonant cavity in the two-dimensional direction can be flexibly changed.
In this embodiment, the proposed resonant cavity has a first metal ridge on the bottom inner wall and a radiation slit on the top of the resonant cavity, the radiation slit extending parallel to the first metal ridge; by adding the metal ridge in the resonant cavity, the wavelength of the waveguide structure can be effectively adjusted, so that the dimension of the antenna in the two-dimensional direction can be flexibly designed, the antenna is not limited, and the flexible caliber of the antenna is realized.
In a specific design manner of the resonant cavity of this embodiment, the resonant cavity includes a lower housing 3 and an upper housing 4, a plurality of first metal ridges 302 are sequentially arranged in parallel on the lower housing 3, a plurality of groups of radiation slits 403 are provided on the upper housing 4, each group of radiation slits 403 is disposed corresponding to one first metal ridge 302, and each group of radiation slits 403 is sequentially distributed along the length direction.
Referring to fig. 2 and 3, this embodiment further proposes a cavity antenna array with a low profile and flexible caliber, including: a feed waveguide 2, a polarization conversion microstrip board, a coaxial waveguide converter 1 and the resonant cavity;
the feed waveguide 2 is internally provided with a conducting channel, the top of the conducting channel is provided with a coupling slit 203 extending along the inner wall of the conducting channel, the bottom of the resonant cavity is provided with an opening 303 correspondingly arranged with the coupling slit 203, the first metal ridge 302 is perpendicular to the extending direction of the conducting channel, the polarization conversion microstrip board is positioned above the resonant cavity, and the coaxial waveguide converter 1 is connected with one end of the conducting channel.
When the antenna array of the embodiment works, an input signal enters the feed waveguide, is coupled into the resonant cavity through the coupling slot, and sequentially enters the polarization conversion microstrip board above through the radiation slot, so that circularly polarized electromagnetic waves are radiated into space. An opening matched with the feed waveguide is formed in the bottom of the resonant cavity, so that the feed waveguide can be tightly connected with the resonant cavity. The microstrip plate structure is adopted to realize circular polarization, so that the traditional metal waveguide circular polarizer is replaced, and the section height of the antenna is reduced to a certain extent.
In this embodiment, the cavity antenna array with a low profile and flexible caliber is provided, a conducting channel is arranged in the feed waveguide, a coupling slot extending along the inner wall of the conducting channel is arranged at the top of the conducting channel, an opening corresponding to the coupling slot is arranged at the bottom of the resonant cavity, a first metal ridge is perpendicular to the extending direction of the conducting channel, a polarization conversion microstrip board is arranged above the resonant cavity, and a coaxial waveguide converter is connected to one end of the conducting channel. The metal ridge is added in the resonant cavity, so that the guided wave length of the waveguide structure can be effectively adjusted, meanwhile, the section height of the antenna is effectively reduced through the design of the microstrip board, the feed waveguide is connected with the resonant cavity through the coupling slot, and the radiation slot is formed in the top of the resonant cavity so that energy is transmitted to the top-layer polarization conversion microstrip board, and circular polarization radiation is achieved.
In a specific embodiment of the feed waveguide, the top of the conducting channel is provided with a plurality of coupling slits 203 which are distributed in sequence, and each first metal ridge 302 is arranged corresponding to one coupling slit 203, so that signals entering the resonant cavity through the coupling slits are uniformly distributed in the resonant cavity.
In a specific design of the conduction channel, the conduction channel bottom has a second metal ridge 201 extending along its length. The metal ridge is arranged in the feed waveguide and used for adjusting the guided wave length of the feed waveguide, so that electromagnetic waves are smoothly coupled into the resonant cavity above from the coupling joint.
Referring to fig. 4-6, in a specific design manner of the polarization conversion microstrip board, a dual polarization conversion patch 502 is provided on the polarization conversion microstrip board, and a vertically arranged rotating shaft is provided on the polarization conversion microstrip board and rotatably installed on the resonant cavity through the rotating shaft. The polarization direction can be adjusted by rotating the polarization-switching microstrip board. Specifically, the polarization conversion microstrip board has a square structure, and the dual-polarization conversion patch 502 has a cross structure whose long-diameter direction is arranged along the diagonal direction of the polarization conversion microstrip board.
In this embodiment, a pair of orthogonal, constant amplitude and 90 ° phase difference signals are formed by the cross-shaped structure of the dual polarization conversion patch 502, thereby realizing circularly polarized radiation. When the antenna works, after the linearly polarized electromagnetic wave enters the upper microstrip plate structure from the radiation slot, the linearly polarized electromagnetic wave is influenced by the cross polarization conversion patch and can be decomposed into two orthogonal modes, the characteristics of equal amplitude and 90 DEG phase difference are achieved, the condition of circular polarization formation is met, and circular polarization radiation is generated at the moment. Because the left-hand circular polarization and the right-hand circular polarization are in an orthogonal relationship in space, and based on the rotation symmetry characteristic of the antenna, the upper microstrip plate can be switched between the left-hand circular polarization and the right-hand circular polarization after being rotated by 90 degrees.
Further, the top of the resonant cavity is provided with a positioning protrusion 402 for positioning the edge of the polarization conversion microstrip board, so that the microstrip boards with different rotation angles can be positioned conveniently.
In a practical design, the polarization conversion microstrip board has a plurality of dual polarization conversion patches 502 uniformly distributed in the same direction. Specifically, according to the use requirement, a plurality of dual-polarized conversion patches can be distributed in an n×n array, correspondingly, radiation slits distributed in an n×n array are formed at the top of the resonant cavity, each radiation slit corresponds to one dual-polarized conversion patch, and N first metal ridges are arranged in the resonant cavity.
In other embodiments of the polarization conversion microstrip board, the polarization conversion microstrip board includes an upper board body 5 and a lower board body 6, the dual-polarization conversion patch 502 is located on the lower board body 6, and parasitic elements disposed corresponding to the dual-polarization conversion patch 502 are disposed on the upper board body 5. The parasitic unit corresponding to the polarization conversion patch is used for further optimizing the circular polarization characteristic and the impedance bandwidth of the antenna. Specifically, dual polarized conversion patch 502 is designed in a cross-shaped configuration and the parasitic element may include a parasitic inner loop 602 and a parasitic outer loop 603.
In the actual design of the antenna array in this embodiment, the antenna array can be flexibly designed according to different working frequency bands and index requirements. The microstrip board may be designed as a single-layer or multi-layer structure. Different microstrip boards can be made of the same material or different materials. The parasitic ring can be designed into a ring structure such as a circular ring, a rectangle, an ellipse, a diamond and the like, and can also be a continuous or discontinuous ring structure.
Likewise, the coupling slits and the radiation slits may take the shape of circles, triangles, etc.
During processing, the dual-polarized patch part can be manufactured by adopting a printed board process, the processing process is mature, the reliability is high, the application range is wide, and the cost is low.
The low-profile flexible caliber cavity antenna array of the present embodiment is described in detail below with specific examples.
According to fig. 1-8, the antenna array of the present embodiment includes a coaxial waveguide converter 1, a feed waveguide 2, a lower housing 3 of a resonant cavity, an upper housing 4 of the resonant cavity, an upper plate 5 of a microstrip plate, and a lower plate 6 of the microstrip plate, which are sequentially disposed from bottom to top. The coaxial waveguide converter comprises a coaxial sleeve 101, a coaxial outer medium 102, a coaxial inner conductor 103, a coaxial waveguide housing 104, a first coaxial matching step 105, a second coaxial matching step 106, and a third coaxial matching step 107. Wherein the coaxial sleeve 101 is connected to the coaxial waveguide housing 104. The coaxial outer medium 102 is inserted in the coaxial sleeve 101 and the coaxial inner conductor 103 is connected to the first coaxial matching step 105 inside the coaxial waveguide housing 104 through the coaxial outer medium 102. The first coaxial matching step 105, the second coaxial matching step 106, and the third coaxial matching step 107 are each used to adjust the impedance matching characteristics of the coaxial waveguide converter 1.
The feed waveguide 2 comprises a second metal ridge 201, a feed waveguide cavity housing 202, and a coupling slit 203. The second metal ridge 201 is used to adjust the guiding wavelength of the feed waveguide 2, so that electromagnetic waves are smoothly coupled into the upper resonant cavity from the coupling slot 203.
The resonator comprises a lower housing 3, a first metal ridge 302, a rectangular opening 303 at the bottom of the resonator and an upper housing 4. The first metal ridge 302 is used to adjust the guided wave length of the resonant cavity, so that the dimension of the resonant cavity in two dimensions can be flexibly changed. The rectangular opening 303 at the bottom of the resonant cavity is sized to correspond to the size of the feed waveguide 2 so that the feed waveguide can be closely coupled to the resonant cavity. The upper housing 4 of the resonator has a positioning boss 402 and a radiation slit 403 at the top. Wherein the positioning protrusions 402 are located at four corners of the upper surface of the upper housing for positioning the microstrip board structure above. The radiation slits 403 are evenly distributed at the top of the upper housing 4.
The polarization conversion microstrip board comprises an upper board body 6 and a lower board body 5, wherein a cross-shaped bidirectional polarization conversion patch 502 is arranged on the lower board body 5, and first polarization conversion steps 5021 and 5022 are arranged at the edge of the bidirectional polarization conversion patch 502. The long axis direction of the bi-directional polarization conversion patch 502 forms an included angle of 45 ° with the extending direction of the radiation slot 403 below, and the first polarization conversion step and the second polarization conversion step are used for adjusting the circular polarization characteristic of the antenna. The upper plate 6 is provided with a parasitic inner ring 603 and a parasitic outer ring 604, which can be used for further optimizing the circular polarization characteristic and the impedance bandwidth of the antenna.
When the antenna works, an input signal enters the feed waveguide 2 through the coaxial waveguide converter 1, is coupled into the resonant cavity through the coupling slot 23, and sequentially enters the upper lower plate 5 and the upper plate 6 through the radiation slot 403, so that circularly polarized electromagnetic waves are radiated into space. The antenna has the capability of radiating two electromagnetic waves of left rotation and right rotation, and can realize the switching between two circular polarizations by rotating the microstrip plate structure by 90 degrees.
Fig. 9 shows the radiation characteristic of the cavity antenna array of the present embodiment, and it can be seen from the figure that the antenna has excellent circular polarized radiation.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. A low profile flexible bore cavity antenna array comprising: a feed waveguide (2), a polarization conversion microstrip board, a coaxial waveguide converter (1) and a resonant cavity;
a conducting channel is arranged in the feed waveguide (2), a coupling slot (203) extending along the inner wall of the conducting channel is arranged at the top of the conducting channel, an opening (303) corresponding to the coupling slot (203) is arranged at the bottom of the resonant cavity, a first metal ridge (302) is arranged perpendicular to the extending direction of the conducting channel, a polarization conversion microstrip board is arranged above the resonant cavity, and a coaxial waveguide converter (1) is connected to one end of the conducting channel;
the inner wall of the bottom of the resonant cavity is provided with a first metal ridge (302), the top of the resonant cavity is provided with a radiation slit (403), and the radiation slit (403) extends parallel to the first metal ridge (302).
2. The cavity antenna array with the low profile and flexible caliber according to claim 1, wherein the resonant cavity comprises a lower shell (3) and an upper shell (4), a plurality of first metal ridges (302) which are sequentially arranged in parallel are arranged on the lower shell (3), a plurality of groups of radiation slits (403) are arranged on the upper shell (4), each group of radiation slits (403) is correspondingly arranged with one first metal ridge (302), and each group of radiation slits (403) are sequentially distributed along the length direction.
3. The cavity antenna array of claim 1, wherein the top of the conductive channel has a plurality of coupling slots (203) distributed in sequence, and each first metal ridge (302) is disposed corresponding to one of the coupling slots (203).
4. The low profile flexible bore cavity antenna array of claim 1, wherein said conductive via bottom has a second metal ridge (201) extending along its length.
5. The cavity antenna array of claim 1, wherein the polarization conversion microstrip board is provided with a dual polarization conversion patch (502), and the polarization conversion microstrip board is provided with a vertically arranged rotating shaft and is rotatably mounted on the resonant cavity through the rotating shaft.
6. The low profile flexible caliber cavity antenna array of claim 5, wherein the polarization conversion microstrip board has a plurality of dual polarization conversion patches (502) uniformly and equidirectionally distributed thereon.
7. The cavity antenna array with the low-profile flexible caliber according to claim 5, wherein the polarization conversion microstrip board comprises an upper board body (5) and a lower board body (6), the dual-polarization conversion patch (502) is located on the lower board body (6), and a parasitic element which is arranged corresponding to the dual-polarization conversion patch (502) is arranged on the upper board body (5).
8. The low profile flexible caliber cavity antenna array of claim 5, wherein the resonant cavity top has a locating boss (402) for locating the polarization-converting microstrip board edge.
9. The cavity antenna array of low profile flexible caliber according to claim 4, wherein the polarization conversion microstrip board has a square structure, and the dual polarization conversion patch (502) has a cross structure, and a long-diameter direction of the cross structure is arranged along a diagonal direction of the polarization conversion microstrip board.
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| CN202210755477.5A CN115101914B (en) | 2022-06-30 | 2022-06-30 | Cavity antenna array with low profile and flexible caliber |
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| CN202210755477.5A CN115101914B (en) | 2022-06-30 | 2022-06-30 | Cavity antenna array with low profile and flexible caliber |
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| CN103384032A (en) * | 2013-06-24 | 2013-11-06 | 中国电子科技集团公司第十研究所 | Broadband low minor lobe ridge waveguide gap array antenna |
| CN107134652A (en) * | 2017-04-21 | 2017-09-05 | 南京邮电大学 | Circular polarisation slot antenna based on triangle substrate integral waveguide resonator |
| CN109786939A (en) * | 2019-01-09 | 2019-05-21 | 南京航空航天大学 | A kind of circular polarisation dualbeam gap cavity antenna |
| CN110854525A (en) * | 2019-12-23 | 2020-02-28 | 盛纬伦(深圳)通信技术有限公司 | Ka-band dual-polarized antenna unit structure based on resonant cavity radiation |
| CN114256626A (en) * | 2021-11-17 | 2022-03-29 | 中国电子科技集团公司第三十八研究所 | Double-frequency double-circular-polarization efficient common-caliber panel antenna |
| CN114498029A (en) * | 2022-01-26 | 2022-05-13 | 福建中科云杉信息技术有限公司 | Broadband waveguide slot array antenna |
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| CN115101914A (en) | 2022-09-23 |
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