CN113193345A - S-shaped caliber circularly polarized antenna unit and array surface antenna - Google Patents
S-shaped caliber circularly polarized antenna unit and array surface antenna Download PDFInfo
- Publication number
- CN113193345A CN113193345A CN202110480720.2A CN202110480720A CN113193345A CN 113193345 A CN113193345 A CN 113193345A CN 202110480720 A CN202110480720 A CN 202110480720A CN 113193345 A CN113193345 A CN 113193345A
- Authority
- CN
- China
- Prior art keywords
- metal
- antenna
- cavity
- metal cavity
- antenna unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 138
- 230000010287 polarization Effects 0.000 claims description 30
- 230000005672 electromagnetic field Effects 0.000 claims description 18
- 238000003491 array Methods 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 17
- 238000010168 coupling process Methods 0.000 abstract description 17
- 238000005859 coupling reaction Methods 0.000 abstract description 17
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 238000003701 mechanical milling Methods 0.000 abstract description 4
- 230000005855 radiation Effects 0.000 description 14
- 239000012528 membrane Substances 0.000 description 10
- 230000009977 dual effect Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 102100027340 Slit homolog 2 protein Human genes 0.000 description 1
- 101710133576 Slit homolog 2 protein Proteins 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005388 cross polarization Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
-
- 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
- H01Q21/061—Two dimensional planar arrays
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Landscapes
- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention relates to an S-shaped caliber circularly polarized antenna unit and a array surface antenna, comprising: the metal cavity is internally provided with an accommodating space, and one side of the metal cavity is provided with an opening; the feed elongated slot is connected with the bottom of the metal cavity into a whole; the metal diaphragms are arranged in the accommodating space, the bottom of each pair of metal diaphragms is connected with the bottom of the accommodating space into a whole, the side faces far away from each other of the metal diaphragms are respectively fixed in the opposite side faces of the accommodating space, and the metal diaphragms are staggered in different planes. The antenna unit adopts a simple open metal cavity structure, is beneficial to metal mechanical milling process and reduces the processing difficulty; the electromagnetic coupling feed elongated slot is parallel to the side wall of the antenna cavity, which is beneficial to the antenna unit to couple feed through the slot on the wide side of the rectangular waveguide, and the antenna unit is expanded in parallel to form a planar array on the basis, so that the adjustment range of the distance between the antenna units is larger, and the scanning characteristic adaptability in the planar array is stronger.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to an S-shaped caliber circularly polarized antenna unit and a array surface antenna.
Background
The antenna is an indispensable device in a radio system, and the implementation forms of the antenna are also various. The antenna is divided into two types of polarization modes of operation, namely linear polarization and circular polarization, wherein the linear polarization comprises horizontal polarization, vertical polarization, oblique polarization and the like, and the circular polarization comprises left-hand circular polarization and right-hand circular polarization. The circularly polarized antenna has the advantages of multipath resistance, easy polarization matching and the like, and is more applied to satellite communication, meteorological radar, electronic reconnaissance and counterwork. In a circularly polarized antenna for satellite communication and data transmission, the waveguide slot antenna has obvious advantages, especially when the circularly polarized antenna works in a band of X or above.
In US5579019 slot waveguide leaky-wave antenna arrays (kohmi Masahiro and ogerma tacaka et al Masahiro Uematsu, Takashi Ojima, etc., slotted waveguide leaky array antenna) and US7436371B1 low loss low profile dual polarized waveguide crescent slot antenna arrays (li. ma. paelson, codex reiliansi et al, Lee m. paulsen, Cedar Rapids, etc., leve cresgive slot array for low-loss, low-profile waveguide leaky-polarization antenna array), the antennas (elements) in the antenna arrays are dual polarized. The two orthogonal linearly polarized antennas have equal radiation amplitudes, and circular polarization is realized by causing a phase difference of 90 degrees by the spacing of the two antennas along the axial direction of the waveguide. The antenna is difficult to process and low in radiation efficiency, is only suitable for a traveling wave antenna array, and cannot form a standing wave antenna array with high efficiency and stable in-band beam direction; when a traveling wave antenna array is formed, the problems of directional dispersion of broadband working beams and reduction of efficiency exist. Such antenna arrays are not suitable for application in wide instantaneous bandwidth systems. In addition, it is difficult to perform amplitude weighting in such an antenna, and a low sidelobe antenna array is configured.
The zhangtao and wanwei proposed an antenna in a circular polarization waveguide standing wave antenna array (chinese patent, CN 200910185457.3), which is a four-ridge open waveguide, and the antenna is excited by a feed waveguide through slot coupling. The circularly polarized antenna (chinese patent, CN 201310454644.3) proposed by wangwei, billows, etc. has a simple structure, but is based on ridge waveguide, and when the operating frequency reaches millimeter wave or above, because the metal waveguide wall occupies space, the ridge waveguide groove and the protruding narrow edge open a dual polarized slot, which is difficult to realize in engineering, and limits the application range.
Disclosure of Invention
The invention aims to provide an S-shaped caliber circularly polarized antenna unit and a front surface antenna, so as to solve the problems of complex structure, difficulty in processing and low radiation efficiency of the conventional antenna unit.
The invention solves the technical problems through the following technical means:
an S-aperture circularly polarized antenna element operating in the ka band, comprising:
the metal cavity is internally provided with an accommodating space, and one side of the metal cavity is provided with an opening;
the long and thin feed slot is formed in the bottom of the metal cavity, and the long edge of the long and thin feed slot is parallel to the side wall of the metal cavity;
the bottom of each pair of metal diaphragms is connected with the bottom of the accommodating space into a whole, the side faces far away from each other of the metal diaphragms are respectively fixed in the opposite side faces of the accommodating space, and the metal diaphragms are arranged along the same diagonal and positioned on two sides of the feed elongated slot to form an antenna with an S-shaped opening in cross section.
The antenna unit adopts a simple open metal cavity structure, is beneficial to metal mechanical milling process and reduces the processing difficulty; the electromagnetic coupling feed elongated slot is parallel to the side wall of the antenna cavity, which is beneficial to the antenna unit to couple and feed through the slot on the wide side of the rectangular waveguide, and the antenna unit is expanded in parallel to form a planar array on the basis, compared with the feed coupling slot adopting the slot coupling and feeding on the wide side of the rectangular waveguide and located on the diagonal antenna unit of the radiation cavity, the antenna unit interval adjusting range is larger, the scanning characteristic adaptability in the planar array is stronger, the structure is simple, the material is single, the processing is easy, the radiation efficiency is high, and the antenna profile is low.
As a further scheme of the invention: the metal cavity is a rectangular caliber cavity.
As a further scheme of the invention: the long edge of the elongated feed slot is parallel to the long edge of the metal cavity.
And the feed elongated slot positioned at the bottom of the opening metal cavity is used as an input or output port, and is parallel to the wide side of the opening metal cavity, so that the feed excitation of the electromagnetic field TE10 main mode in the metal cavity is realized.
As a further scheme of the invention: the metal membranes are in a pair, one of the metal membranes is connected with the inner wall of the side face of the wide edge of the metal cavity, and the other metal membrane is connected with the inner wall of the side face of the other corresponding wide edge.
The two metal membranes are arranged on two sides of the coupling feed elongated slot, are arranged diagonally and are connected with the bottom and the side wall of the opening metal cavity, so that TE10 main mode electromagnetic field deflection in the metal cavity is realized, orthogonal TE01 mode electromagnetic field components are obtained, and meanwhile, 90-degree phase difference between two orthogonal modes of a TE10 mode and a TE01 mode is realized after the electromagnetic field deflection.
As a further scheme of the invention: the length and the width of the metal cavity are between 0.5 lambdoh and lambdoh, wherein lambdoh is the wavelength of the highest frequency in the free space in the working frequency band.
As a further scheme of the invention: the length of the feed elongated slot is 0.5 lambda 0, the minimum value of the width of the feed elongated slot is larger than 0.5mm, and the maximum value of the width of the feed elongated slot is smaller than b-2Wd, wherein b is the width of the metal cavity determined by the unit spacing defined by the beam scanning range, and Wd is the width of the metal film.
As a further scheme of the invention: the length of the metal diaphragm is 0-a, the width Wd is 0.3 mm-0.5 b, and the distance D between the metal diaphragm and the wide edge of the opening metal cavity is 0-0.5 (b-Ws-Wd), wherein a is the length of the metal cavity, and b is the width of the metal cavity.
As a further scheme of the invention: the feeding long and thin slot is a rectangular waveguide which is arranged at the bottom of the metal cavity, and the antenna unit is excited by feeding through the wide-side longitudinal slot of the rectangular waveguide.
As a further scheme of the invention: the width of the metal cavity is the same as that of the rectangular waveguide, electromagnetic waves are fed in from one port of the rectangular waveguide and coupled into the open metal cavity through the longitudinal gap, and orthogonal polarization electromagnetic field separation and 90-degree phase are achieved by deflecting the metal diaphragm through an electromagnetic field.
As a further scheme of the invention: a planar array antenna is characterized in that M S-shaped caliber circularly polarized antenna units are continuously placed on the wide side of a rectangular waveguide to form linear arrays, N linear arrays are arranged in parallel to form a two-dimensional planar array, metal walls are shared between metal cavities in adjacent circularly polarized antenna units in the two-dimensional planar array, and a grid frame structure is formed overall;
wherein M, N is a positive integer;
when M is 12 and N is 8, an 8 multiplied by 12 planar array antenna is formed, the circular polarization axial ratio of the planar array antenna in the frequency range of 28.81-31.3 GHz is less than 3dB, the impedance bandwidth of the 12 unit linear array-10 dB is 29.36-30.56 GHz, and the thickness of the antenna array is 7 mm.
The S-shaped caliber circularly polarized antenna units are expanded in parallel to form a planar array, metal walls can be shared among the S-shaped caliber circularly polarized antenna units, weight reduction of the antenna array is facilitated, half of waveguide walls is reduced relative to the fact that the feed coupling seam is located on an oblique diagonal line of a radiation cavity, when the antenna units are combined into the planar antenna array, a plurality of cavities are arranged in parallel, the influence of stray radiation of cavity-reducing electromagnetic fields in the diagonally-arranged planar antenna array on the axial ratio of the antenna array is eliminated, and the circularly polarized performance of the antenna array is guaranteed.
The invention has the advantages that:
1. the invention adopts a simple open metal cavity structure, is beneficial to the mechanical milling process of metal and reduces the processing difficulty; the electromagnetic coupling feed elongated slot 2 is arranged on the side wall of the antenna cavity, which is beneficial to the antenna unit to couple and feed through the slot on the wide side of the rectangular waveguide, and the antenna unit is expanded in parallel to form a planar array on the basis, compared with the antenna unit which is positioned on the diagonal line of the radiation cavity by the feed coupling slot of the slot coupling feed on the wide side of the rectangular waveguide, the antenna unit has larger distance adjusting range, stronger scanning characteristic adaptability in the planar array, simple structure, single material, easy processing, high radiation efficiency and low antenna profile.
2. In the invention, the S-shaped caliber circularly polarized antenna units are expanded in parallel to form a planar array, all the S-shaped caliber circularly polarized antenna units can share a metal wall, the weight of the antenna array is reduced, compared with the situation that a feed coupling seam is positioned on an oblique diagonal of a radiation cavity, a waveguide wall is reduced by half, when the antenna units are combined into the planar antenna array, a plurality of cavities are arranged in parallel, the influence of the parasitic radiation of a cavity-reducing electromagnetic field in the diagonally-arranged planar antenna array on the axial ratio of the antenna array is eliminated, and the circularly polarized performance of the antenna array is ensured.
3. The verified S-shaped caliber circularly polarized antenna unit has the axial ratio less than 3dB, the bandwidth of 7.53 percent, the unit directivity coefficient of 6.3dB, the section height less than 0.56 lambda 0 and lambda 0 which is the wavelength of the central frequency of a working frequency band in a free space; when the designed antenna unit constructs a planar array, the antenna unit shares the metal wall in parallel, is in a grid shape and has excellent mechanical property.
Drawings
Fig. 1 is a schematic three-dimensional structure diagram of an S-shaped circular polarization antenna unit provided in embodiment 1 of the present invention.
Fig. 2 is a top view of an S-shaped circular polarization antenna unit according to embodiment 1 of the present invention.
Fig. 3 shows the antenna radiation patterns and the cross polarization of the S-shaped circular polarization antenna unit provided in embodiment 1 of the present invention.
Fig. 4 is an antenna axial ratio frequency response curve of the S-shaped circular polarization antenna unit provided in embodiment 1 of the present invention.
Fig. 5 is a schematic three-dimensional structure diagram of an S-shaped circular polarization antenna unit according to embodiment 2 of the present invention.
Fig. 6 is a top view of an S-shaped circular polarization antenna unit according to embodiment 2 of the present invention.
Fig. 7 is an x-z cross-sectional view of coupling feeding with a rectangular waveguide in embodiment 2 of the present invention.
Fig. 8 is a schematic perspective view of a planar array antenna expanded into 8 × 12 elements by antenna elements according to embodiment 3 of the present invention.
Fig. 9 is a circular polarization axial ratio frequency response curve of the planar array antenna provided in embodiment 3 of the present invention.
Fig. 10 is a S11 curve of the planar array antenna provided in embodiment 3 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, an S-aperture circular polarized antenna unit, operating in ka band, includes:
the metal cavity body 1, there is a space in the said metal cavity body 1, and one side has openings;
the long and thin feed slot 2 is arranged at the bottom of the metal cavity 1, and the long side of the long and thin feed slot 2 is parallel to the side wall of the metal cavity 1;
at least more than one pair of metal diaphragms 3, wherein in each pair of metal diaphragms 3, the bottom is connected with the bottom of the accommodating space into a whole, the side surfaces, far away from each other, of the metal diaphragms 3 are respectively fixed in the opposite side surfaces of the accommodating space, and the metal diaphragms 3 are positioned at two sides of the elongated feed slot 2 to form an antenna with an S-shaped cross section.
The antenna adopts a simple open metal cavity structure, so that the metal mechanical milling process is facilitated, and the processing difficulty is reduced; the electromagnetic coupling feed elongated slot 2 is parallel to the side wall of the antenna cavity, which is beneficial to the antenna unit to couple and feed through the slot on the wide side of the rectangular waveguide, and the antenna unit is expanded in parallel to form a planar array on the basis, compared with the antenna unit which adopts the feed coupling slot on the diagonal of the radiation cavity and fed through the slot on the wide side of the rectangular waveguide, the adjustment range of the distance between the antenna units is larger, and the scanning characteristic adaptability in the planar array is stronger.
More specifically, the metal cavity 1 is a rectangular caliber cavity, the upper part of the metal cavity is completely opened, the geometric center of the metal surface at the bottom of the metal cavity 1 is provided with a feeding elongated slot 2 with a rectangular structure, and the long edge of the feeding elongated slot 2 is parallel to the long edge of the rectangular metal cavity 1.
The feed elongated slot 2 positioned at the bottom of the open metal cavity 1 is used as an input or output port, the feed elongated slot 2 is parallel to the wide side of the open metal cavity 1, and feed excitation of the electromagnetic field TE10 main mode in the metal cavity is realized.
In the scheme of the embodiment of the present disclosure, the metal membranes 3 are a pair, one of the metal membranes 3 is connected to the inner wall of the broad-side of the metal cavity 1, the other metal membrane 3 is connected to the inner wall of the corresponding other broad-side, and the two metal membranes 3 are arranged along the same diagonal and located at two sides of the elongated feed slot 2.
The two metal membranes 3 are arranged on two sides of the coupling feed elongated slit, are arranged diagonally and are connected with the bottom and the side wall of the open metal cavity 1, so that the electromagnetic field deflection of the TE10 main mode in the metal cavity is realized, the electromagnetic field component of the orthogonal TE01 mode is obtained, and meanwhile, the 90-degree phase difference between the two orthogonal modes of the TE10 mode and the TE01 mode after the electromagnetic field deflection is realized.
For convenience of description of the product, referring to fig. 2, the metal cavity 1 has a length a, a width b, a height H, a length and a width of the feeding elongated slit 2 Ls and Ws, and the height is selected according to practical application requirements, which is further described in embodiment 2, the length of the metal diaphragm 3 playing a role in deflecting an electromagnetic field is Ld, the width of the metal diaphragm 3 is Wd, the height of the metal diaphragm 3 is the same as that of the metal cavity 1, and the thickness of the metal walls of all the metal cavities 1 takes the same value as t.
The center frequency of the antenna unit is 30GHz, and full-wave electromagnetic simulation software HFSS is used for optimization. Specifically, the length a and the width b of the metal cavity 1 are determined according to the unit spacing defined by the beam scanning range when the circularly polarized antenna units form an array, and are generally between 0.5 λ h and λ h, where λ h is the wavelength of the highest frequency in free space in the working frequency band.
The preferred metal chamber 1 of this embodiment has a length a of 6mm, a width b of 5mm, and a height H of 3.6 mm.
The length Ls of the feed elongated slot 2 is determined by the resonant length of the working frequency, and is about 0.5 λ 0, λ 0 is the wavelength of the central frequency of the working frequency band in free space, the minimum value of the width Ws of the feed elongated slot 2 is determined by the processing conditions, and is usually greater than 0.5mm, the maximum value is limited by the width of the open metal cavity 1 and the thickness of the metal membrane, i.e. less than b-2Wd, the length and the width of the feed elongated slot 2 in the embodiment are preferably 6mm and 1.4mm, and the height of the feed elongated slot is the same as the thickness of the metal wall, preferably 0.8 mm;
the maximum size of the length Ld and the width Wd of the electromagnetic field deflection metal diaphragm 3 is limited by the length and the width of the metal cavity 1, the width is limited by the metal machining capacity and is usually larger than 0.3mm, namely the length Ld is between 0 and a, the width Wd is between 0.3mm and 0.5b, the distance D between the metal diaphragm 3 and the wide edge of the opening metal cavity 1 is limited by the width b of the metal cavity 1, the width Ld of the coupling feed slender seam and the width of the diaphragm and is between 0 and 0.5 (b-Ws-Wd).
In order to reduce the weight and take machining capability into consideration, the width Wd of the metal diaphragm in the embodiment is preferably 0.8mm, which is the same as that of the metal waveguide wall, and the length Ld of the metal diaphragm and the dimension D of the broadside 1 from the wall of the wall are optimized by taking the in-band axial ratio of the antenna as a target, so that the performance that the axial ratio of the medium-frequency antenna is close to 0dB is realized, and the size parameter of the diaphragm is determined. Through optimization, the Ld and the D are preferably 2mm and 1mm, the obtained antenna performance simulation results are shown in fig. 3 and 4, the axial ratio of the antenna unit in the 28.88-31.14 GHz frequency band (relative bandwidth is 7.53%) is less than 3dB, and the medium-frequency directivity coefficient is 6.3 dB.
Example 2
Referring to fig. 5 to 7, this embodiment is an extension of embodiment 1, and is used to further describe a use situation of the antenna unit of the present invention, where the elongated feeding slot 2 is a rectangular waveguide 4, the rectangular waveguide 4 is disposed at the bottom of the metal cavity 1, the antenna unit in this embodiment is fed and excited by a wide-side longitudinal slot of the rectangular waveguide 4, the longitudinal slot is equivalent to the elongated feeding slot 2 in the antenna unit in embodiment 1, the width of the metal cavity 1 is the same as the width of the rectangular waveguide 4, electromagnetic waves are fed through one port of the rectangular waveguide 4 and coupled into the open metal cavity 1 through the longitudinal slot, and orthogonal polarization electromagnetic field separation and 90-degree phase are achieved by deflecting the metal diaphragm 3 with an electromagnetic field, so as to obtain circularly polarized radiation.
In addition, the feeding elongated slot 2 becomes a coupling slot opened on the common metal between the metal cavity 1 and the rectangular waveguide 4, and the height is the same as the wall thickness of the common metal.
This embodiment illustrates that the longitudinal slot is parallel to the wide side of the open metal cavity 1, so that the rectangular waveguide 4 is easily aligned with the metal wall of the open metal cavity 1.
Example 3
Referring to fig. 8, a planar array antenna according to embodiment 2 is formed by an array of a plurality of S-shaped circular polarized antenna units, a plurality of circular polarized antenna units according to embodiment 2 are continuously placed on a wide side of a rectangular waveguide 4 to form linear arrays, the linear arrays are arranged in parallel to form a two-dimensional planar array, and in the two-dimensional planar array, metal walls are shared between metal cavities 1 in adjacent circular polarized antenna units, so that a grid frame structure is formed overall.
Specifically, in the embodiment of the present disclosure, the planar array antenna may be formed by expanding 8 × 12 embodiments 2, and is used to further explain a use situation of the antenna unit of the present invention expanded into a planar array, where the specific implementation method is as follows: 12 circularly polarized antenna units are continuously placed on the wide side of the rectangular waveguide 4 to form a linear array, and on the basis, 8 linear arrays are arranged in parallel to form a two-dimensional planar array. In the planar array, the metal walls are shared between the open metal cavities 1 of the adjacent circular polarization antenna units, the grid framework structure is formed overall, and the 8 × 12 planar array antenna can be integrally processed as a unit module of a planar phased array antenna.
The antenna array works in a Ka frequency band, on the basis of an optimization result of the embodiment 1 and a structure of the embodiment 2, a circular polarization axial ratio of the optimized antenna in a frequency range of 28.81-31.3 GHz (relative bandwidth is 8.28%) is less than 3dB, an impedance bandwidth of 12 unit linear arrays to 10dB is 29.36-30.56 GHz (relative bandwidth is 4%), the height H of a metal cavity 1 in the antenna is 3.6mm, the total thickness of upper and lower layers of waveguide walls of a waveguide 4 is 1.6mm, in order to reduce the thickness of the whole antenna and simultaneously consider processing capacity, the cavity height of the waveguide 4 is selected to be 1.8mm, and the final antenna array thickness is 7 mm.
According to the actual engineering requirements or the actual processing capability, the antenna array module composed of M × N antenna units of embodiment 1, such as 8 × 8, 16 × 16, 8 × 16 unit modules, can be further assembled and expanded into a required large planar antenna array on the basis of the integrally processed antenna module.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An S-aperture circularly polarized antenna element operating in the ka band, comprising:
the metal cavity (1), there are holding spaces in the said metal cavity (1), and one side has openings;
the long and thin feed seam (2) is arranged at the bottom of the metal cavity (1), and the long side of the long and thin feed seam (2) is parallel to the side wall of the metal cavity (1);
the bottom of each pair of metal diaphragms (3) is connected with the bottom of the accommodating space into a whole, and the metal diaphragms (3) are arranged along the same diagonal and positioned on two sides of the feed elongated slot (2) to form an open antenna with an S-shaped cross section.
2. The S-aperture circularly polarized antenna unit according to claim 1, wherein said metal cavity (1) is a rectangular aperture cavity.
3. The S-aperture circularly polarized antenna unit according to claim 1, wherein the long side of said elongated feed slot (2) is parallel to the long side of said metal cavity (1).
4. The S-aperture circularly polarized antenna unit according to claim 1, wherein said metal diaphragms (3) are a pair, one of said metal diaphragms (3) is connected to the inner wall of the broad side of the metal cavity (1), and the other of said metal diaphragms (3) is connected to the corresponding inner wall of the other broad side.
5. The S-aperture circularly polarized antenna unit according to claim 1, wherein the length and width of said metal cavity (1) is between 0.5 λ h and λ h, where λ h is the wavelength of the highest frequency in free space in the operating band.
6. The S-aperture circularly polarized antenna element according to claim 1, wherein the length of the elongated feeding slot (2) is 0.5 λ 0, the width of the elongated feeding slot (2) is a minimum value greater than 0.5mm and a maximum value smaller than b-2Wd, wherein b is the width of the metal cavity (1) determined by the element spacing defined by the beam scanning range, and Wd is the width of the metal diaphragm (3).
7. The S-shaped circular polarization antenna unit according to claim 1, wherein the length of the metal diaphragm (3) is between 0 and a, the width Wd is between 0.3mm and 0.5b, and the distance D between the metal diaphragm (3) and the wide side of the open metal cavity (1) is between 0 and 0.5 (b-Ws-Wd);
wherein, a is the length of the metal cavity (1), and b is the width of the metal cavity (1).
8. The S-aperture circularly polarized antenna unit according to claim 1, wherein said elongated slot (2) is a rectangular waveguide (4), said rectangular waveguide (4) is disposed at the bottom of the metal cavity (1), and the rectangular waveguide (4) is excited by wide-side longitudinal slot feed.
9. The S-aperture circularly polarized antenna unit according to claim 8, wherein said metal cavity (1) has the same width as the rectangular waveguide (4), electromagnetic waves are fed from one port of the rectangular waveguide (4) and coupled into the open metal cavity (1) through the longitudinal slot, and orthogonal polarized electromagnetic field separation and 90 degree phase are achieved by deflecting the metal diaphragm (3) with electromagnetic field.
10. A planar array antenna based on the S-shaped circular polarization antenna unit of any one of claims 8 to 9, wherein M S-shaped circular polarization antenna units are continuously placed on the wide side of the rectangular waveguide (4) to form linear arrays, N linear arrays are arranged in parallel to form a two-dimensional planar array, and in the two-dimensional planar array, metal walls are shared between metal cavities (1) in adjacent circular polarization antenna units to form a grid frame structure as a whole;
wherein M, N is a positive integer;
when M is 12 and N is 8, an 8 multiplied by 12 planar array antenna is formed, the circular polarization axial ratio of the planar array antenna in the frequency range of 28.81-31.3 GHz is less than 3dB, the impedance bandwidth of the 12 unit linear array-10 dB is 29.36-30.56 GHz, and the thickness of the antenna array is 7 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110480720.2A CN113193345B (en) | 2021-04-30 | 2021-04-30 | S-shaped caliber circularly polarized antenna unit and array face antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110480720.2A CN113193345B (en) | 2021-04-30 | 2021-04-30 | S-shaped caliber circularly polarized antenna unit and array face antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113193345A true CN113193345A (en) | 2021-07-30 |
| CN113193345B CN113193345B (en) | 2022-12-02 |
Family
ID=76983035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110480720.2A Active CN113193345B (en) | 2021-04-30 | 2021-04-30 | S-shaped caliber circularly polarized antenna unit and array face antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113193345B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113851825A (en) * | 2021-09-26 | 2021-12-28 | 中国电子科技集团公司第三十八研究所 | Millimeter wave broadband circularly polarized radiator and design method thereof |
| CN113964536A (en) * | 2021-10-27 | 2022-01-21 | 中国电子科技集团公司第三十八研究所 | Circular polarization two-dimensional wide-angle phase scanning antenna unit and phased array antenna array |
| CN114374092A (en) * | 2021-12-23 | 2022-04-19 | 西安电子科技大学 | Broadband low-profile miniaturized AMC cavity monopole antenna |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030067367A1 (en) * | 2001-10-05 | 2003-04-10 | Vladimir Volman | Dual-band electromagnetic coupler |
| US20060158382A1 (en) * | 2005-01-20 | 2006-07-20 | Murata Manufacturing Co., Ltd. | Waveguide horn antenna array and radar device |
| CN101150224A (en) * | 2007-10-31 | 2008-03-26 | 中国电子科技集团公司第三十八研究所 | Broadband dual L wave guide narrow edge gap antenna array |
| US7436371B1 (en) * | 2006-01-31 | 2008-10-14 | Rockwell Collins, Inc. | Waveguide crescent slot array for low-loss, low-profile dual-polarization antenna |
| CN101702467A (en) * | 2009-11-13 | 2010-05-05 | 中国电子科技集团公司第三十八研究所 | Circular polarization waveguide standing-wave antenna |
| CN102013375A (en) * | 2010-11-12 | 2011-04-13 | 电子科技大学 | Energy coupling device suitable for winding double comb teeth slow wave structure |
| CN102496784A (en) * | 2011-11-11 | 2012-06-13 | 中国电子科技集团公司第三十八研究所 | Ridge waveguide broad-side horizontal straight slot antenna |
| CN102570002A (en) * | 2011-12-08 | 2012-07-11 | 浙江大学 | Millimeter wave single-side radiating all-metal broad beam antenna |
| CN103490168A (en) * | 2013-09-29 | 2014-01-01 | 中国电子科技集团公司第三十八研究所 | Circular polarized antenna |
| CN103700938A (en) * | 2013-12-12 | 2014-04-02 | 浙江大学 | Full metal circular polarization and liner polarization 8-shaped wave beam antenna of millimeter wave |
| WO2014080298A1 (en) * | 2012-11-22 | 2014-05-30 | Aselsan Elektronik Sanayi Ve Ticaret Anonim Sirketi | Circularly polarized slotted waveguide antenna |
| CN105490019A (en) * | 2015-10-26 | 2016-04-13 | 北京遥测技术研究所 | Circularly polarized ridge waveguide slot antenna |
| CN106911003A (en) * | 2017-03-01 | 2017-06-30 | 中国电子科技集团公司第三十八研究所 | A kind of broadband circle polarized radiating guide and its aerial array |
| CN206506005U (en) * | 2016-08-29 | 2017-09-19 | 成都赛纳为特科技有限公司 | A kind of twisted waveguide separate type directrix plane rectangular waveguide S-shaped folded waveguide |
| CN107275724A (en) * | 2017-06-16 | 2017-10-20 | 成都赛纳为特科技有限公司 | Broadband inserted sheet circular polarizer with spread bandwidth function |
| WO2019015298A1 (en) * | 2017-07-18 | 2019-01-24 | 东南大学 | Low-profile broadband circularly-polarized array antenna using stacked travelling wave antenna elements |
| CN109687156A (en) * | 2018-12-14 | 2019-04-26 | 北京遥测技术研究所 | High efficiency circular polarisation Waveguide slot linear array antenna |
| CN110518368A (en) * | 2019-08-30 | 2019-11-29 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Circular polarisation slotted waveguide antenna |
-
2021
- 2021-04-30 CN CN202110480720.2A patent/CN113193345B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030067367A1 (en) * | 2001-10-05 | 2003-04-10 | Vladimir Volman | Dual-band electromagnetic coupler |
| US20060158382A1 (en) * | 2005-01-20 | 2006-07-20 | Murata Manufacturing Co., Ltd. | Waveguide horn antenna array and radar device |
| US7436371B1 (en) * | 2006-01-31 | 2008-10-14 | Rockwell Collins, Inc. | Waveguide crescent slot array for low-loss, low-profile dual-polarization antenna |
| CN101150224A (en) * | 2007-10-31 | 2008-03-26 | 中国电子科技集团公司第三十八研究所 | Broadband dual L wave guide narrow edge gap antenna array |
| CN101702467A (en) * | 2009-11-13 | 2010-05-05 | 中国电子科技集团公司第三十八研究所 | Circular polarization waveguide standing-wave antenna |
| CN102013375A (en) * | 2010-11-12 | 2011-04-13 | 电子科技大学 | Energy coupling device suitable for winding double comb teeth slow wave structure |
| CN102496784A (en) * | 2011-11-11 | 2012-06-13 | 中国电子科技集团公司第三十八研究所 | Ridge waveguide broad-side horizontal straight slot antenna |
| CN102570002A (en) * | 2011-12-08 | 2012-07-11 | 浙江大学 | Millimeter wave single-side radiating all-metal broad beam antenna |
| WO2014080298A1 (en) * | 2012-11-22 | 2014-05-30 | Aselsan Elektronik Sanayi Ve Ticaret Anonim Sirketi | Circularly polarized slotted waveguide antenna |
| CN103490168A (en) * | 2013-09-29 | 2014-01-01 | 中国电子科技集团公司第三十八研究所 | Circular polarized antenna |
| CN103700938A (en) * | 2013-12-12 | 2014-04-02 | 浙江大学 | Full metal circular polarization and liner polarization 8-shaped wave beam antenna of millimeter wave |
| CN105490019A (en) * | 2015-10-26 | 2016-04-13 | 北京遥测技术研究所 | Circularly polarized ridge waveguide slot antenna |
| CN206506005U (en) * | 2016-08-29 | 2017-09-19 | 成都赛纳为特科技有限公司 | A kind of twisted waveguide separate type directrix plane rectangular waveguide S-shaped folded waveguide |
| CN106911003A (en) * | 2017-03-01 | 2017-06-30 | 中国电子科技集团公司第三十八研究所 | A kind of broadband circle polarized radiating guide and its aerial array |
| CN107275724A (en) * | 2017-06-16 | 2017-10-20 | 成都赛纳为特科技有限公司 | Broadband inserted sheet circular polarizer with spread bandwidth function |
| WO2019015298A1 (en) * | 2017-07-18 | 2019-01-24 | 东南大学 | Low-profile broadband circularly-polarized array antenna using stacked travelling wave antenna elements |
| CN109687156A (en) * | 2018-12-14 | 2019-04-26 | 北京遥测技术研究所 | High efficiency circular polarisation Waveguide slot linear array antenna |
| CN110518368A (en) * | 2019-08-30 | 2019-11-29 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Circular polarisation slotted waveguide antenna |
Non-Patent Citations (3)
| Title |
|---|
| 汪伟等: "星载合成孔径雷达双极化天线阵研究", 《遥感技术与应用》 * |
| 胡磊: "宽带圆极化波导缝隙天线的研究", 《中国优秀硕士学位论文全文数据库》 * |
| 黄刚等: "顺序旋转馈电背腔圆极化天线阵列", 《电子器件》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113851825A (en) * | 2021-09-26 | 2021-12-28 | 中国电子科技集团公司第三十八研究所 | Millimeter wave broadband circularly polarized radiator and design method thereof |
| CN113964536A (en) * | 2021-10-27 | 2022-01-21 | 中国电子科技集团公司第三十八研究所 | Circular polarization two-dimensional wide-angle phase scanning antenna unit and phased array antenna array |
| CN113964536B (en) * | 2021-10-27 | 2023-08-22 | 中国电子科技集团公司第三十八研究所 | Circularly polarized two-dimensional wide-angle phase-scanning antenna unit and phased array antenna array |
| CN114374092A (en) * | 2021-12-23 | 2022-04-19 | 西安电子科技大学 | Broadband low-profile miniaturized AMC cavity monopole antenna |
| CN114374092B (en) * | 2021-12-23 | 2022-12-06 | 西安电子科技大学 | Broadband low-profile miniaturized AMC cavity monopole antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113193345B (en) | 2022-12-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113193345B (en) | S-shaped caliber circularly polarized antenna unit and array face antenna | |
| US7180457B2 (en) | Wideband phased array radiator | |
| US5361076A (en) | Continuous transverse stub element devices and methods of making same | |
| CA2600627C (en) | True-time-delay feed network for cts array | |
| JP2001094340A (en) | Slot array antenna with cavity | |
| CN114256626B (en) | Dual-frequency dual-circular polarization efficient common-caliber flat antenna | |
| CN111864377B (en) | Broadband collinear seam waveguide slot antenna | |
| CN114335999A (en) | K/Ka waveband dual-band dual-circularly-polarized antenna based on gap waveguide | |
| CN113690584A (en) | Millimeter wave wide-angle scanning phased-array antenna based on substrate integrated ridge waveguide | |
| CN116487902A (en) | Dual-polarized open waveguide array antenna capable of realizing wide-angle beam deflection | |
| CN113300124A (en) | Right-hand circularly polarized array antenna based on slot waveguide technology | |
| CN113964536B (en) | Circularly polarized two-dimensional wide-angle phase-scanning antenna unit and phased array antenna array | |
| CN116130979A (en) | Low-sidelobe back cavity slot array antenna | |
| CN113013610B (en) | Co-aperture antenna body integrating sub-6GHz frequency band and millimeter wave frequency band and corresponding terminal | |
| US11303034B2 (en) | Parallel-plate antenna | |
| CN114156652A (en) | Low-sidelobe broadband low-cross polarization plane dipole antenna array | |
| CN113964544A (en) | Array-level satellite-borne light polarization conversion metal resonant cavity | |
| CN216251151U (en) | Broadband wide-angle scanning waveguide slot antenna unit and phased array | |
| CN115663485B (en) | Millimeter wave terahertz high-gain slot array antenna | |
| Zahran et al. | An 8× 8 cavity backed waveguide antenna array for D-band backhauling communications | |
| CN116666961A (en) | Low-profile dual-polarized waveguide slot array antenna unit | |
| CN113594717A (en) | Wide-angle scanning phased array based on bent cross-shaped dielectric resonant antenna unit | |
| Bayraktar | A Dual Polarized Shared Aperture Compact Unit Cell Element for Antenna Array Applications | |
| CN116505269A (en) | Dielectric resonator antenna for millimeter wave and terminal equipment | |
| CN115441197A (en) | High-gain waveguide slot antenna array |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |