CN209313017U - Broadband circle polarized waveguide array antenna - Google Patents
Broadband circle polarized waveguide array antenna Download PDFInfo
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- CN209313017U CN209313017U CN201822271769.3U CN201822271769U CN209313017U CN 209313017 U CN209313017 U CN 209313017U CN 201822271769 U CN201822271769 U CN 201822271769U CN 209313017 U CN209313017 U CN 209313017U
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Abstract
The utility model belongs to technical field of satellite communication, disclose broadband circle polarized waveguide array antenna, including multimode cavity, metal phase shifting equipment and feed waveguide, coupling gap is connected between the multimode cavity and feed waveguide, multimode cavity is equipped with multiple radiation wave holes far from the side of feed waveguide, and multiple radiation wave holes are the arrangement of 2 × 2 array formats, and the line of centres for radiating wave hole is rectangle, metal phase shifting equipment be equipped with it is multiple, each radiation wave hole has been correspondingly provided with metal phase shifting equipment.The utility model realizes the broadband circle polarized radiation of four waveguide gap array of a feedback by the way that metal phase shifting equipment is cleverly arranged in four open ended waveguide feed gaps.
Description
Technical field
The utility model belongs to technical field of satellite communication, and in particular to broadband circle polarized waveguide array antenna.
Background technique
Increasingly develop at present to high band in communications band, especially in Ku, Ka wave band, frequency determines that bandwidth compares work
In L, the antenna of S-band, in the requirement antenna of this frequency range, with size, small, high gain, the characteristic of spot beam, realization are above-mentioned for work
The antenna of performance is mainly the following antenna form, but respectively has advantage and disadvantage:
1, Waveguide slot antenna: the form antenna is cracked in waveguide broadside or narrow side, usually there is traveling wave, standing wave two
Kind of array format, but the gain in radiating element gap is relatively low, usually only 7dB or so, due to for series feed form, in bandwidth
There is frequency and sweep phenomenon, with increasing for working frequency, it is desirable that machining accuracy is also higher, need to process and make by higher welding procedure
It makes, yield rate is lower, leads to higher cost.
2, micro-strip paster antenna, the antenna form is with profile is low, can integrate active device, radiating element and net can be achieved
Network integrated design, but the dielectric loss of antenna is larger, and there are leaky wave effects, and antenna element gain is low, feeding network damages
Consumption is big, does not utilize and realizes high-gain aerial design.
3, reflector antenna, the form antenna have good radio-frequency performance in Ka frequency range, differential loss is low, radiation efficiency is high,
Realize that circular polarization radiation relative skill is relatively simple, but the form antenna physical size is larger, is not suitable in some installation spaces
Narrow occasion.
4, lens antenna, the antenna form is similar with reflector antenna, generallys use feed irradiation medium ball, medium cake
Deng, focus wave beam, realize the purpose of high-gain irradiation, but it is same as reflector antenna have that antenna volume is oversized, with
Planar array antenna, which compares, conformal to be installed.
Circular polarized antenna is developed by linear polarized antenna, they are all a kind of special cases of elliptic polarized antenna, one
As the little elliptic polarized antenna of ovality is referred to as circular polarized antenna, circular polarisation can be divided into left-handed and two kinds of dextrorotation again.Circle
Poliarizing antenna is widely used in the various aspects such as radar, electronic countermeasure, scouting and interference, communication, remote sensing telemetering.Make in radar
The interference of cloud, rain can be resisted with circular polarized antenna；In electronic countermeasure, it can interfere and scout enemy's using circular polarized antenna
The electric wave of various linear polarizations and elliptic polarization mode；Circular polarized antenna is used in Aeronautics and Astronautics communication and remote-measuring equipment, can be disappeared
Except the distortion effects that polarize as caused by the Faraday rotation effect of ionosphere.
Currently, existing antenna is primarily present following problems:
1, existing antenna is mostly linear polarization, since polarization mode leads to jitter.
2, existing antenna can not carry out phase shift adjusting.
Utility model content
The utility model aim is to provide broadband circle polarized waveguide array antenna, by changing the structure of antenna, change
The polarization mode of antenna, secondly, realizing the broadband circle polarized of four waveguide gap array of a feedback by four radiation wave holes of setting
Radiation.
In order to solve the above problems existing in the present technology, the technology employed by the present utility model is
Broadband circle polarized waveguide array antenna, including multimode cavity, metal phase shifting equipment and feed waveguide, the multimode cavity
It is equipped with feed gaps between body and feed waveguide, is equipped with metal phase shifting equipment at the feed gaps.
The multimode cavity is equipped with multiple radiation wave holes far from the side of feed waveguide, and multiple radiation wave holes are 2 × 2
Array format arrangement, the axis line for radiating wave hole is rectangle.
Further, by the way that the radiation wave hole of 2 × 2 array formats is arranged, the wave for realizing a feedback four is propagated.
Further, by the way that metal phase shifting equipment is cleverly arranged in four open ended waveguide feed gaps, one is realized
Present the broadband circle polarized radiation of four waveguide gap arrays.
Further, the radiation wave hole is circle.
Further, so that wave loss when propagating is minimum.
Further, the multimode cavity is connected with partition far from the side of feed waveguide, and the partition is equipped with multiple spokes
Ejected wave hole.
It further, further include multiple open ended waveguides for being connected to partition, the open ended waveguide and radiation wave hole are right one by one
It should be arranged.
Further, the metal phase shifting equipment is set to the inside of multimode cavity.
Further, by by metal phase shifting equipment be arranged in multimode cavity body, radiation electromagnetic polarization mode by
Linear polarization becomes circular polarisation, to realize the circular polarization radiation of antenna, the antenna submatrix of this civilization constitutes large-scale array, due to
One feed gaps motivates four open ended waveguides, greatly improves the radiation efficiency of large-scale array, meanwhile, keep the section of antenna big
It is big to reduce.
Further, the metal phase shifting equipment includes mutually matched first metal phase shift blocks and the second metal phase shift
Block, the first metal phase shift blocks and the second metal phase shift blocks along radiation wave hole edge be arranged, the first metal phase shift blocks and
Phase shift slot is equipped between second metal phase shift blocks, the projection of the phase shift fluted shaft line and the angle of 21 long axis direction of feed gaps are
45°。
Further, the axis of multiple phase shift slots 53 is arranged in parallel, so that wave is lost most when propagating
It is small.
Further, since metal phase shift blocks are added to Waveguide slot, and there is 45 ° of seam between two metal phase shift blocks
Gap, so that the electric field perpendicular to radiating slot motivated is made to be decomposed into the electric fields of two cross polarizations, and 90 ° of phase difference,
The electromagnetic wave of circle polarization of a certain rotation direction thus is generated, and is radiated free space.
Further, by the way that metal phase shifting equipment is arranged, the broadband circle polarized radiation of waveguide gap array is realized.
Further, the coupling gap is located at the lower layer of four radiation wave holes, and coupling gap is motivated on multimode cavity
Linear polarization electric current, and be coupled in radiation wave hole, and in the electric field for wherein having motivated rotation, be radiated free space, realize circle
Polarized radiation.The length for coupling gap is 0.47 λ0, width is 0.05 λ0, wherein λ0For center frequency corresponding wavelength.
Further, 1.1 λ of its length of the multimode cavity0, width is 0.9 λ0。
Further, the multimode cavity is rectangular cavities.
Further, the multimode cavity of the rectangle can guarantee that the loss of wave is minimum when back wave.
Further, the open ended waveguide is the shell that end face is in rectangle.
The utility model has the following beneficial effects:
(1) the utility model realizes the wave propagation of a feedback four by the radiation wave hole of 2 × 2 array formats of setting.
(2) the utility model is realized by the way that metal phase shifting equipment is cleverly arranged in four open ended waveguide feed gaps
The broadband circle polarized radiation of one four waveguide gap arrays of feedback.
(3) size that the utility model passes through restriction rectangular cavities, it is determined that the working frequency range and bandwidth of operation of antenna.
(4) the utility model is by being made rectangular housing for open ended waveguide, so that the open ended waveguide of rectangle is in back wave
When, it can guarantee that the loss of wave is minimum.
(5) the utility model is by the rectangular cavity of multimode cavity system, so that the multimode cavity of rectangle is when back wave,
It can guarantee that the loss of wave is minimum.
(6) the utility model by limit coupling gap length, enable the antenna when wave passes through to greatest extent
Retain the energy of wave.
(7) the utility model is by being arranged metal phase shifting equipment in multimode cavity body, the polarization of ele side of radiation
Formula becomes circular polarisation from linear polarization, thus realize the circular polarization radiation of antenna, so that antenna submatrix constitutes large-scale array, due to
One feed gaps motivates four open ended waveguides, greatly improves the radiation efficiency of large-scale array, meanwhile, greatly reduce antenna
Size.
(8) the utility model is by the improvement to antenna structure, so that bandwidth of the antenna axial ratio less than 3dB is 15%, day
The radiation efficiency of line is greater than 80%, realizes high efficiency circular polarized antenna, is relatively suitably applied in small-bore satellite antenna system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the partial sectional view of Fig. 1；
Fig. 3 is the main view of the utility model；
Fig. 4 is the connection schematic diagram of metal phase shifting equipment in the utility model；
Fig. 5 is the axis of the utility model than figure；
Fig. 6 is the gain diagram of the utility model.
In figure: 1- open ended waveguide；2- multimode cavity；21- feed gaps；3- partition；4- radiates wave hole；5- metal phase shift dress
It sets；51- the first metal phase shift blocks；52- the second metal phase shift blocks；53- phase shift slot；6- feed waveguide.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is further elaborated the utility model.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing.It should be understood that herein
Described specific embodiment is only used for describing and explaining the present invention, and is not intended to limit the utility model.
Embodiment 1:
As shown in Figure 1, broadband circle polarized waveguide array antenna, including multimode cavity 2, metal phase shifting equipment 5 and feed wave
6 are led, coupling gap 21 is connected between the multimode cavity 2 and feed waveguide 6.
The multimode cavity 2 is equipped with multiple radiation wave holes 4 far from the side of feed waveguide 6, and multiple radiation wave holes 4 are
The arrangement of 2 × 2 array formats, the line of centres of radiation wave hole 4 are rectangle.
By the way that the radiation wave hole of 2 × 2 array formats is arranged, the wave for realizing a feedback four is propagated.
By the way that metal phase shifting equipment is cleverly arranged in four open ended waveguide feed gaps, four waveguide of feedback seam is realized
The broadband circle polarized radiation of gap array.
Embodiment 2:
As shown in Figs 1-4, broadband circle polarized waveguide array antenna, including multimode cavity 2, metal phase shifting equipment 5 and feed
Waveguide 6 is equipped with feed gaps 21, is equipped with metal phase shift at the feed gaps 21 between the multimode cavity 2 and feed waveguide 6
Device 5.
The multimode cavity 2 is equipped with multiple radiation wave holes 4 far from the side of feed waveguide 6, and multiple radiation wave holes 4 are
The arrangement of 2 × 2 array formats, the axis line of radiation wave hole 4 are rectangle.
By the way that the radiation wave hole 4 of 2 × 2 array formats is arranged, the wave for realizing a feedback four is propagated, by cleverly at four
Metal phase shifting equipment 5 is set in open ended waveguide feed gaps, realizes the broadband circle polarized radiation of four waveguide gap array of a feedback.
The radiation wave hole 4 is circle, so that wave loss when propagating is minimum.
1.1 λ of its length of the multimode cavity0, width is 0.9 λ0, the length of feed gaps 21 is 0.47 λ0, width is
0.05λ0, wherein λ0For center frequency corresponding wavelength, 1.1 λ of its length of multimode cavity 20, width is 0.9 λ0, wherein λ0Centered on frequency
Rate corresponding wavelength.
The multimode cavity 2 is rectangular cavities, and open ended waveguide 1 is the shell that end face is in rectangle.
The metal phase shifting equipment 5 is set to the inside of multimode cavity 2.
The metal phase shifting equipment 5 includes mutually matched first metal phase shift blocks 51 and the second metal phase shift blocks 52, institute
It states and is equipped with phase shift slot, the projection of the phase shift fluted shaft line and feed between the first metal phase shift blocks 51 and the second metal phase shift blocks 52
The angle of 21 axis projections of gap is 45 °.
The projection of the phase shift fluted shaft line and the angle of 21 long axis direction of feed gaps are 45 °.
The axis of multiple phase shift slots 53 is arranged in parallel, so that wave loss when propagating is minimum.
Since metal phase shift blocks are added to Waveguide slot, and there is 45 ° of gap between two metal phase shift blocks, to make
The electric field perpendicular to radiating slot motivated is decomposed into the electric field of two cross polarizations, and 90 ° of phase difference, thus generates certain
The electromagnetic wave of circle polarization of one rotation direction, and it is radiated free space.
By being arranged metal phase shifting equipment 5 in multimode cavity 2, the electromagnetic polarization mode of radiation is become by linear polarization
For circular polarisation, so that the circular polarization radiation of antenna is realized, so that antenna submatrix constitutes large-scale array, due to a feed gaps
Four open ended waveguides are motivated, the radiation efficiency of large-scale array is greatly improved, meanwhile, greatly reduce the size of antenna.
By the way that metal phase shifting equipment is arranged, the broadband circle polarized radiation of waveguide gap array is realized, 21, gap is coupled
It in the lower layer of multimode cavity 2, couples gap 21 and motivates initial line polarization current on multimode cavity 2, and be coupled to radiation wave hole 4
In, and in the electric field for wherein having motivated rotation, it is radiated free space, realizes circular polarization radiation.Coupling gap 21 length be
0.47λ0, width is 0.05 λ0, wherein λ0For center frequency corresponding wavelength.
Embodiment 3:
As shown in Figs 1-4, broadband circle polarized waveguide array antenna, including multimode cavity 2, metal phase shifting equipment 5 and feed
Waveguide 6 is equipped with feed gaps 21, is equipped with metal phase shift at the feed gaps 21 between the multimode cavity 2 and feed waveguide 6
Device 5.
The multimode cavity 2 is equipped with multiple radiation wave holes 4 far from the side of feed waveguide 6, and multiple radiation wave holes 4 are
The arrangement of 2 × 2 array formats, the axis line of radiation wave hole 4 are rectangle.
By the way that the radiation wave hole 4 of 2 × 2 array formats is arranged, the wave for realizing a feedback four is propagated, by cleverly at four
Metal phase shifting equipment 5 is set in open ended waveguide feed gaps, realizes the broadband circle polarized radiation of four waveguide gap array of a feedback.
The radiation wave hole 4 is circle, so that wave loss when propagating is minimum, multimode cavity 2 is far from feed waveguide 6
Side be connected with partition 3, the partition 3 is equipped with multiple radiation wave holes 4.
The metal phase shifting equipment 5 is set to the inside of multimode cavity 2, and the metal phase shifting equipment 5 includes mutually matched
First metal phase shift blocks 51 and the second metal phase shift blocks 52, between the first metal phase shift blocks 51 and the second metal phase shift blocks 52
Equipped with phase shift slot, the projection of the phase shift fluted shaft line and the angle of 21 axis projections of feed gaps are 45 °, multiple phase shift slots
53 axis is arranged in parallel, so that wave loss when propagating is minimum, since metal phase shift blocks are added to Waveguide slot,
And there is 45 ° of gap between two metal phase shift blocks, so that the electric field perpendicular to radiating slot motivated be made to be decomposed into two
The electric field of a cross polarization, and 90 ° of phase difference, thus the electromagnetic wave of circle polarization of a certain rotation direction is generated, and be radiated free sky
Between.By the way that metal phase shifting equipment is arranged, the broadband circle polarized radiation of waveguide gap array is realized, coupling gap 21 is located at multimode
Initial line polarization current is motivated in the lower layer of cavity 2, coupling gap 21 on multimode cavity 2, and is coupled in radiation wave hole 4, and
The electric field for wherein having motivated rotation is radiated free space, realizes circular polarization radiation.The length for coupling gap 21 is 0.47 λ0,
Width is 0.05 λ0, wherein λ0For center frequency corresponding wavelength.
By being arranged metal phase shifting equipment 5 in multimode cavity 2, the electromagnetic polarization mode of radiation is become by linear polarization
For circular polarisation, so that the circular polarization radiation of antenna is realized, so that antenna submatrix constitutes large-scale array, due to a feed gaps
Four open ended waveguides are motivated, the radiation efficiency of large-scale array is greatly improved, meanwhile, greatly reduce the size of antenna.
The multimode cavity 2 is rectangular cavities, and open ended waveguide 1 is the shell that end face is in rectangle.
It further include multiple open ended waveguides 1 for being connected to partition 3, the open ended waveguide 1 is set with the radiation one-to-one correspondence of wave hole 4
It sets.
Embodiment 4:
As shown in figures 1 to 6, broadband circle polarized waveguide array antenna, including multimode cavity 2, metal phase shifting equipment 5 and feed
Waveguide 6 is equipped with feed gaps 21, is equipped with metal phase shift at the feed gaps 21 between the multimode cavity 2 and feed waveguide 6
Device 5.
The multimode cavity 2 is equipped with multiple radiation wave holes 4 far from the side of feed waveguide 6, and multiple radiation wave holes 4 are
The arrangement of 2 × 2 array formats, the axis line of radiation wave hole 4 are rectangle.
By the way that the radiation wave hole 4 of 2 × 2 array formats is arranged, the wave for realizing a feedback four is propagated.
By the way that metal phase shifting equipment 5 is cleverly arranged in four open ended waveguide feed gaps, four waveguide of a feedback is realized
The broadband circle polarized radiation of gap array.
The radiation wave hole 4 is circle.
So that wave loss when propagating is minimum.
The multimode cavity 2 is connected with partition 3 far from the side of feed waveguide 6, and the partition 3 is equipped with multiple radiation wave holes
4。
It further include multiple open ended waveguides 1 for being connected to partition 3, the open ended waveguide 1 is set with the radiation one-to-one correspondence of wave hole 4
It sets.
The metal phase shifting equipment 5 is set to the inside of multimode cavity 2.
By being arranged metal phase shifting equipment 5 in multimode cavity 2, the electromagnetic polarization mode of radiation is become by linear polarization
For circular polarisation, so that the circular polarization radiation of antenna is realized, so that antenna submatrix constitutes large-scale array, due to a feed gaps
Four open ended waveguides are motivated, the radiation efficiency of large-scale array is greatly improved, meanwhile, greatly reduce the size of antenna.
The metal phase shifting equipment 5 includes mutually matched first metal phase shift blocks 51 and the second metal phase shift blocks 52, institute
It states and is equipped with phase shift slot, the projection of the phase shift fluted shaft line and feed between the first metal phase shift blocks 51 and the second metal phase shift blocks 52
The angle of 21 axis projections of gap is 40-48 °.
The projection of the phase shift fluted shaft line and the angle of 21 long axis direction of feed gaps are 45 °.
The axis of multiple phase shift slots 53 is arranged in parallel, so that wave loss when propagating is minimum.
Since metal phase shift blocks are added to Waveguide slot, and there is 45 ° of gap between two metal phase shift blocks, to make
The electric field perpendicular to radiating slot motivated is decomposed into the electric field of two cross polarizations, and 90 ° of phase difference, thus generates certain
The electromagnetic wave of circle polarization of one rotation direction, and it is radiated free space.
By the way that metal phase shifting equipment is arranged, the broadband circle polarized radiation of waveguide gap array is realized.
The coupling gap 21 is located at the lower layer of multimode cavity 2, and linear polarization has been motivated on multimode cavity 2 in coupling gap 21
Electric current, and be coupled in radiation wave hole 4, and in the electric field for wherein having motivated rotation, be radiated free space, realize circular polarisation spoke
It penetrates.The length for coupling gap 21 is 0.47 λ0, width is 0.05 λ0, wherein λ0For center frequency corresponding wavelength.
The multimode cavity 2 is rectangular cavities.
The open ended waveguide 1 is the shell that end face is in rectangle.
The length of the feed gaps 21 is 0.47 λ0, width is 0.05 λ0, wherein λ0For center frequency corresponding wavelength.
1.1 λ of its length of the multimode cavity 20, width is 0.9 λ0, wherein λ0For center frequency corresponding wavelength.
Utility model works principle is as follows: when transmitting a signal, electromagnetic signal is passed through 6 feed-in of feed waveguide by transmitter
Into multimode cavity 2, the focused energy in multimode cavity 2, and inner arm electric current in upper surface is disturbed by coupling gap 21, generate resonance
Electric current, this oscillating current is in radiation wave hole 4, since metal phase shift blocks, and two metal phase shift blocks are added to Waveguide slot
Between have 40-45 ° of gap, so that the electric field perpendicular to radiating slot motivated be made to be decomposed into the electricity of two cross polarizations
, and 90 ° of phase difference, thus the electromagnetic wave of circle polarization of a certain rotation direction is generated, and be radiated free space.The transmitting of antenna with
It is received as reciprocity process.
The utility model is not limited to above-mentioned optional embodiment, anyone can obtain under the enlightenment of the utility model
Other various forms of products, however, making any variation in its shape or structure, all the utility model rights that falls into are wanted
The technical solution in confining spectrum is sought, is all fallen within the protection scope of the utility model.
Claims (10)
1. broadband circle polarized waveguide array antenna, it is characterised in that: including multimode cavity (2), metal phase shifting equipment (5) and feed
Waveguide (6) is equipped with feed gaps (21) between the multimode cavity (2) and feed waveguide (6), sets at the feed gaps (21)
There are metal phase shifting equipment (5)；
The multimode cavity (2) is equipped with multiple radiation wave holes (4), multiple radiation wave holes far from the side of feed waveguide (6)
(4) it arranges for 2 × 2 array formats, the axis line of radiation wave hole (4) is rectangle.
2. broadband circle polarized waveguide array antenna according to claim 1, it is characterised in that: the radiation wave hole (4) is
It is round.
3. broadband circle polarized waveguide array antenna according to claim 1, it is characterised in that: the multimode cavity (2) is remote
Side from feed waveguide (6) is connected with partition (3), and the partition (3) is equipped with multiple radiation wave holes (4).
4. broadband circle polarized waveguide array antenna according to claim 3, it is characterised in that: further include it is multiple be connected to every
The open ended waveguide (1) of plate (3), the open ended waveguide (1) are arranged in a one-to-one correspondence with radiation wave hole (4).
5. broadband circle polarized waveguide array antenna according to claim 2, it is characterised in that: the metal phase shifting equipment
(5) it is set to the inside of multimode cavity (2).
6. broadband circle polarized waveguide array antenna according to claim 5, it is characterised in that: the metal phase shifting equipment
It (5) include mutually matched first metal phase shift blocks (51) and the second metal phase shift blocks (52), the first metal phase shift blocks
(51) phase shift slot, the projection of the phase shift fluted shaft line and feed gaps (21) axis are equipped between the second metal phase shift blocks (52)
The angle of projection is 45 °.
7. broadband circle polarized waveguide array antenna according to claim 1, it is characterised in that: the multimode cavity (2) is
Rectangular cavities.
8. broadband circle polarized waveguide array antenna according to claim 4, it is characterised in that: the open ended waveguide (1) is
End face is in the shell of rectangle.
9. broadband circle polarized waveguide array antenna according to claim 1, it is characterised in that: the feed gaps (21)
Length is 0.47 λ 0, and width is 0.05 λ 0, and wherein λ 0 is center frequency corresponding wavelength.
10. broadband circle polarized waveguide array antenna according to claim 1, it is characterised in that: the multimode cavity (2) its
1.1 λ 0 of length, width are 0.9 λ 0, and wherein λ 0 is center frequency corresponding wavelength.
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| CN201822271769.3U CN209313017U (en) | 2018-12-29 | 2018-12-29 | Broadband circle polarized waveguide array antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822271769.3U CN209313017U (en) | 2018-12-29 | 2018-12-29 | Broadband circle polarized waveguide array antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509993A (en) * | 2018-12-29 | 2019-03-22 | 四川睿迪澳科技有限公司 | Broadband circle polarized waveguide array antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509993A (en) * | 2018-12-29 | 2019-03-22 | 四川睿迪澳科技有限公司 | Broadband circle polarized waveguide array antenna |
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