CN111864316A - Waveguide polarization conversion device - Google Patents
Waveguide polarization conversion device Download PDFInfo
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- CN111864316A CN111864316A CN202010820380.9A CN202010820380A CN111864316A CN 111864316 A CN111864316 A CN 111864316A CN 202010820380 A CN202010820380 A CN 202010820380A CN 111864316 A CN111864316 A CN 111864316A
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- waveguide
- microwave dielectric
- dielectric plate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
- H01P1/161—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion sustaining two independent orthogonal modes, e.g. orthomode transducer
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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
Abstract
The invention discloses a waveguide polarization conversion device, and belongs to the technical field of communication. The device comprises a waveguide cavity and a microwave dielectric plate positioned in the waveguide cavity; the waveguide cavity is formed by sequentially connecting a square waveguide, a flat waveguide and a rectangular waveguide; the microwave dielectric plate is positioned in the waveguide cavity and parallel to the extending direction of the waveguide cavity. The invention has the characteristics of compact and simple structure and small size; and the 90-degree phase shift bandwidth is 22%, so that the technical requirements of most earth stations on an antenna feeder network can be met.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a waveguide polarization conversion device.
Background
At present, the frequency spectrum of communication in the satellite communication field is wider and higher, and the requirement on radio frequency terminals is higher and higher, so that the working bandwidth of the antenna is required to be widened gradually. The waveguide polarization conversion device is taken as a main component in a circularly polarized satellite communication antenna network system and is increasingly paid attention by engineering technicians, qualified experts and relevant scholars, and the excellent degree of the performance of the waveguide polarization conversion device directly influences the quality of satellite communication.
The waveguide circular polarizer at present mainly has the following forms:
1. the partition plate circular polarization device: the polarizer is a classical waveguide polarization conversion device and is characterized in that the bandwidth is about 20%, and the left-handed and right-handed simultaneous operation is realized, but the polarizer has the problems that the relative size is large, the longitudinal length of 10 wavelengths is needed, and the polarizer is limited by space installation in a small-caliber reflecting surface feed network system and cannot meet the use requirement.
2. The medium piece circular polarizer: the circular polarization device has the advantages that the dielectric sheet is inserted into the square waveguide or the circular waveguide, the structure is compact, the power capacity is moderate, and the circular polarization axial ratio bandwidth is limited by the working principle of the circular polarization device, so that the circular polarization device cannot meet the bandwidth of most standard satellite communication frequency spectrums.
3. Ripple circular polarizer: the circular polarizer can realize broadband performance, and realize broadband phase shift value in 1.5 frequency doubling by loading stepped corrugations on a square waveguide (circular waveguide), so that high-performance circular polarization radiation in the broadband is realized, but the circular polarizer is large and heavy in structural size, and a small-caliber antenna surface is not easy to mount.
4. Add ridge ripple structure circular polarizer: the form is similar to the performance of a corrugated circular polarizer, and the broadband shift connection is realized in 2 frequency doubling steps by loading stepped corrugations in ridge waveguides, so that the high-performance circular polarization radiation in the broadband is realized, but the structure of the broadband circular polarization radiation is large and heavy, and the broadband circular polarization radiation is not suitable for being used for installing a small-caliber reflector antenna microwave network system.
The waveguide polarizers have the advantages and disadvantages, and although the characteristics of individual indexes are excellent, the common defects of the waveguide polarizers are large size and heavy structure, and the installation requirements of the small-caliber reflecting antenna cannot be met.
Disclosure of Invention
In view of the above, the present invention provides a waveguide polarization conversion device. The broadband antenna has the characteristics of miniaturization, wide bandwidth, compact structure and low cost.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a waveguide polarization conversion device comprises a waveguide cavity and a microwave dielectric slab positioned in the waveguide cavity; the waveguide cavity is formed by sequentially connecting a square waveguide, a flat waveguide and a rectangular waveguide; the microwave dielectric plate is parallel to the flat waveguide, is positioned in the square waveguide and extends to the flat waveguide.
Furthermore, the section of the inner wall of the flat waveguide is rectangular, and the size of the long edge of the inner wall is the same as that of the inner wall of the square waveguide; and a thin sheet clapboard is arranged at the central position in the flat waveguide and divides the tail end of the flat waveguide into an upper cavity and a lower cavity.
Furthermore, a clamping groove for clamping the microwave dielectric plate is arranged at the end part of the thin sheet partition plate, and a rectangular opening is formed in one side wall of the clamping groove; the microwave dielectric plate is positioned in the clamping groove and is provided with a rectangular gap coinciding with the rectangular opening.
Furthermore, the rectangular waveguide is connected with the flat waveguide and is provided with a cavity with a rectangular opening, and the tail end of the other cavity of the flat waveguide is of a short-circuit structure; the size of the long edge of the inner cavity of the rectangular waveguide is the same as that of the long edge of the inner cavity of the flat waveguide, and the height of the rectangular waveguide is the same as that of the cavity with the rectangular opening of the flat waveguide and is the standard waveguide wide-edge size corresponding to the working frequency band.
Further, a metal copper-clad pattern is arranged on the surface of the microwave dielectric plate; the metal copper clad pattern comprises a metal ground, a radiation oscillator and a guiding unit.
Furthermore, the metal ground comprises two metal plates which are respectively positioned on two surfaces of the microwave dielectric plate and are in mirror symmetry with respect to the microwave dielectric plate; and the outer end structures of part of each metal ground are positioned in the clamping grooves, two rows of metal through holes which are the same as the extending direction of the square waveguide are respectively arranged at the two sides of each metal ground, and the metal through holes are connected with the metal grounds on the two surfaces of the microwave dielectric plate.
Furthermore, the two radiation oscillators are respectively arranged on two surfaces of the microwave dielectric plate, and are in mirror symmetry with respect to the microwave dielectric plate.
Furthermore, the guide units comprise three guide units which are a first circular patch guide unit, a second circular patch guide unit and a third circular patch guide unit in sequence from small to large in size, wherein the circle center of each guide unit is positioned on the geometric center line of the surface of the microwave dielectric slab and is the same as the extension direction of the square waveguide; the guiding units are all arranged on the same surface of the microwave dielectric plate, are positioned at the top end of the radiation oscillator, and are a first circular patch guiding unit, a second circular patch guiding unit and a third circular patch guiding unit from top to bottom in sequence.
Furthermore, the radiation oscillator comprises a radiation oscillator arm and T-shaped strip line matching branch sections, a T-shaped opening is formed in the center of the inner end of the metal ground, the same T-shaped strip line matching branch sections are arranged in the T-shaped openings, and the two T-shaped strip line matching branch sections extend to the corresponding radiation oscillator arm through parallel double lines.
Furthermore, the included angle between the radiation oscillator arm and the corresponding parallel double line is 60 degrees.
The invention adopts the technical scheme to produce the beneficial effects that:
1. the invention has the characteristics of compact and simple structure and small size.
2. The waveguide polarization conversion device has a 90-degree phase shift bandwidth of 22 percent, and can meet the technical requirements of most earth stations on an antenna feeder network.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is an exploded view of the structure of fig. 1.
Fig. 3 is a schematic view of the internal structure of the flat waveguide of fig. 1.
Fig. 4 is a schematic top view of the microwave dielectric slab of fig. 1.
Fig. 5 is a schematic view of the lower surface of the microwave dielectric plate of fig. 1.
In the figure: 1. the microwave dielectric plate comprises a microwave dielectric plate, 2, a waveguide cavity, 3, a square waveguide, 4, a flat waveguide, 5, a rectangular waveguide, 6, a rectangular opening, 7, a clamping groove, 8, a sheet partition plate, 9, a first circular patch guiding unit, 10, a second circular patch guiding unit, 11, a third circular patch guiding unit, 12, parallel double lines, 13, a T-shaped strip line matching support section, 14, a radiation oscillator arm, 15, a T-shaped opening, 16, a rectangular gap, 17, a metal through hole, 18 and a metal ground.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
A waveguide polarization conversion device comprises a waveguide cavity and a microwave dielectric slab positioned in the waveguide cavity; the waveguide cavity is formed by sequentially connecting a square waveguide, a flat waveguide and a rectangular waveguide; the microwave dielectric plate is parallel to one wall surface of the waveguide cavity.
Furthermore, the section of the inner wall of the flat waveguide is rectangular, and the size of the long edge of the inner wall is the same as that of the inner wall of the square waveguide; and a thin sheet clapboard is arranged at the central position in the flat waveguide and divides the flat waveguide into two cavities.
Furthermore, a clamping groove for clamping the microwave dielectric plate is arranged at the end part of the thin sheet partition plate, and a rectangular opening is formed in one side wall of the clamping groove; the microwave dielectric plate is positioned in the clamping groove and is provided with a rectangular gap coinciding with the rectangular opening.
Furthermore, the rectangular waveguide and the rectangular opening are positioned on the same side of the thin-sheet partition plate, the size of the long side of the inner wall of the rectangular waveguide is the same as that of the long side of the inner wall of the flat waveguide, and the size of the wide side is the standard waveguide wide side size of the corresponding working frequency band; the tail end of the flat waveguide is arranged in a short circuit mode, and the position of the short circuit and the position where the flat waveguide and the rectangular waveguide are connected are symmetrical relative to the thin-sheet partition plate. Further, a metal copper-clad pattern is arranged on the surface of the microwave dielectric plate; the metal copper clad pattern comprises a metal ground, a radiation oscillator and a guiding unit.
Furthermore, the metal ground comprises two metal plates which are respectively positioned on two surfaces of the microwave dielectric plate and are in mirror symmetry with respect to the microwave dielectric plate; and the outer end structures of part of each metal ground are positioned in the clamping grooves, two rows of metal through holes which are the same as the extending direction of the square waveguide are respectively arranged at the two sides of each metal ground, and the metal through holes are connected with the metal grounds on the two surfaces of the microwave dielectric plate.
Furthermore, the two radiation oscillators are respectively arranged on two surfaces of the microwave dielectric plate, and are in mirror symmetry with respect to the microwave dielectric plate.
Furthermore, the guide units comprise three guide units which are a first circular patch guide unit, a second circular patch guide unit and a third circular patch guide unit in sequence from small to large in size, wherein the circle center of each guide unit is positioned on the geometric center line of the surface of the microwave dielectric slab and is the same as the extension direction of the square waveguide; the guiding units are all arranged on the same surface of the microwave dielectric plate, are positioned at the top end of the radiation oscillator, and are a first circular patch guiding unit, a second circular patch guiding unit and a third circular patch guiding unit from top to bottom in sequence.
Furthermore, the radiation oscillator comprises a radiation oscillator arm and T-shaped strip line matching branch sections, a T-shaped opening is formed in the center of the inner end of the metal ground, the same T-shaped strip line matching branch sections are arranged in the T-shaped openings, and the two T-shaped strip line matching branch sections extend to the corresponding radiation oscillator arm through parallel double lines.
Furthermore, the included angle between the radiation oscillator arm and the corresponding parallel double line is 60 degrees.
The following is a more specific example:
as shown in fig. 1 to 5, the present embodiment includes a waveguide cavity 2 and a microwave dielectric slab 1, the microwave dielectric slab is embedded inside the waveguide cavity, and one end of the waveguide cavity is a rectangular waveguide port, which is an equipment network interface; the other end is a square waveguide port which is an antenna feed source interface.
Specifically, the waveguide cavity is mainly divided into three parts, namely a square waveguide 3, a flat waveguide 4 and a rectangular waveguide 5, and the three parts are integrated by adopting a numerical control milling machine processing technology.
One end of the square waveguide is a feed source interface connected with a feed source, the other end is connected with the flat waveguide, the cross section of the inner cavity of the square waveguide is square, the side length meets the boundary condition of a main mode of a transmission signal, and the length is about 1.25 lambda0The length of the microwave printed board depends on the length of the microwave printed board arranged in the moon, and the length of the position of the square waveguide port exceeding the extended terminal position of the microwave medium board is 0.03 lambda0Wherein λ is0The wavelength corresponding to the working center frequency of the antenna.
The structure size of the square waveguide can realize main mode transmission, the section of the inner cavity of the waveguide is square, one side port is connected with the feed source, and the other side port is connected with one side port of the flat waveguide.
The flat waveguide is connected with the square waveguide terminal, the section of the inner wall of the flat waveguide is rectangular, the size of the long edge of the inner wall is consistent with that of the inner wall of the square waveguide, and the size of the wide edge is 0.35 lambda smaller than that of the long edge0The long side dimension is 0.625 lambda0。
The thin partition plate 8 is arranged in the flat waveguide cavity, the thickness of the partition plate is 3mm, the thin partition plate is arranged at the geometric center of the flat waveguide and divides the flat waveguide into an upper space and a lower space, the left space and the right space are in mirror symmetry with respect to the partition plate, and in order to prevent signal leakage, the tail end of the upper space is in short circuit arrangement; the position of the mirror image of the position of the lower half space and the short-circuit surface relative to the thin partition plate is a rectangular waveguide interface position.
The extension end of the thin sheet clapboard is provided with a clamping groove 7, the width of the clamping groove is 1mm, the thickness of the clamping groove is consistent with that of the microwave dielectric slab, a rectangular opening 6 is arranged on the side wall of the lower part (the same side with the rectangular waveguide) of the clamping groove, the extension direction of the rectangular opening is parallel to the long side of the rectangular waveguide, and the geometric center point of the rectangular opening is on the geometric center line of the left side surface of the thin sheet clapboard.
The microwave dielectric plate is arranged in the waveguide, the front end of the microwave dielectric plate points to the mouth of the square waveguide, the rear end of the microwave dielectric plate is clamped in the clamping groove, the rear end of the microwave dielectric plate is arranged in a metal mode, and conductive adhesive is coated on the surface of the microwave dielectric plate to enable the microwave dielectric plate to be in close electrical contact with the clamping groove, so that reliable fixing is achieved.
The extending direction of the long edge of the microwave dielectric plate is consistent with the extending direction of the waveguide routing, the narrow edge of the microwave dielectric plate is perpendicular to the side wall of the square waveguide, and the geometric center line of the narrow edge of the microwave dielectric plate is superposed with the geometric center line of the inner cavity of the square waveguide. The two sides of the microwave printed board are provided with metal copper-clad patterns, and the metal copper-clad patterns mainly comprise a metal ground, a radiation oscillator and three circular patch leading units.
The metal ground 18 is partially inserted into the slot of the flat waveguide partition plate, so that the microwave printed plate body is fixed, and the microwave printed plate body and the waveguide are integrally grounded.
Furthermore, a row of metal through holes 17 are respectively arranged on two sides of the metal ground along the extending direction of the waveguide, the metal ground is used for conducting the metal grounds on two sides of the microwave dielectric plate, the gap of the through holes is smaller than 8mm, the aperture is 3mm, and the number of the through holes covers the longitudinal length of the metal ground.
At a distance L from the bottom of the metal ground5＝0.08λ0Is provided with a length of 0.32 lambda0The rectangular gap 16 is of a rectangular structure, and the width of the gap is 1 mm.
Furthermore, two completely consistent T-shaped openings are formed in the center positions of the metal-coated copper extending tail ends on two sides of the dielectric surface of the microwave dielectric plate, completely identical T-shaped strip line matching branch sections are arranged in the two T-shaped openings, and the T-shaped strip line matching branch sections extend to the pair of radiation vibrators 4 through parallel double lines.
The radiation oscillator arms 14 are in mirror symmetry with respect to the geometric center line of the microwave printed board, the two radiation oscillator arms 14 are respectively arranged on two sides of the printed board, the radiation oscillator arms are obliquely arranged, the included angle between the radiation oscillator arms and a parallel double line is theta 60 degrees, and the length L of the oscillator arms is L4＝0.225λ0Width W of oscillator arm is 0.025 lambda0。
Parallel double lines 12 respectively arranged on two sides of the microwave printed board are fed and connected between the radiating oscillator arm 14 and a T-shaped strip line matching branch, the impedance of the parallel double lines meets the requirements of the range of 80 omega-110 omega in a frequency band, and the length L of the parallel double lines4＝0.21λ0。
The T-shaped strip line matching branch knot 13 is arranged in a T-shaped gap 15 on the metal ground, the gap area surrounds the T-shaped strip line matching branch knot, and a gap is reserved between the T-shaped strip line matching branch knot and the T-shaped strip line matching branch knot.
Three circular patch leading units, namely a first circular patch leading unit 9, a second circular patch leading unit 10 and a third circular patch leading unit 11, are sequentially arranged at the top end of the radiation oscillator arm, and the diameters of the three circular patch leading units are respectively 0.1 lambda0，0.12λ0，0.15λ0。
Furthermore, the circle centers of the three circular patch guiding units are collinear with the geometric center line of the surface of the microwave dielectric slab and are consistent with the extending direction of the waveguide, a certain gap is left between the three, and the gap between the first circular patch guiding unit and the top end of the radiation oscillator arm is 0.011 lambda0A first circular patch guide unit and a second circular patch guide unitThe center-to-center distance of the cells is 0.32 lambda0The center distance between the second circular guiding unit and the third circular patch guiding unit is 0.29 lambda0。
The three circular patch leading units and the radiation oscillator arm are positioned on the same side of the microwave printed board.
The thickness of the microwave dielectric plate is 1mm, the value is limited to the working frequency band below 18GHz, and when the frequency is higher than 18GHz, the microwave dielectric plate can be properly thick according to simulation calculation.
The microwave polarizer mainly comprises two main parts, namely a waveguide cavity and a microwave dielectric plate, wherein flange interfaces are arranged at two ends of the waveguide cavity and are respectively arranged at a feed source and an equipment network, the mechanical installation is realized, the structure is compact, the miniaturization design is greatly reduced compared with that of a traditional polarizer, and the length of an inner cavity is only 5 lambda0And the advantages are obvious.
The working principle of the polarization conversion device is as follows: when the transmitting signal enters the rectangular waveguide port, the TE with proper electric field vertical to the long side is excited in the rectangular waveguide01The electromagnetic wave excites a rectangular opening in a flat waveguide, excites a slow wave oscillating in an approximate medium Surface Integrated Waveguide (SIW) formed by a metal ground and via holes on two sides through a rectangular gap arranged on the metal ground of a microwave printed board, is coupled through T-shaped strip line matching branches at the tail end of the metal ground, is transmitted to a vibrator arm through parallel double lines, and is further strengthened by a circular guiding patch unit; on the other hand, the other part of electric field energy in the flat waveguide reaches the port of the square waveguide through the square waveguide feeder, the electric field vectors of the flat waveguide and the flat waveguide are orthogonal compared with the energy on the printed board, the phase difference is 90 degrees, signals of the flat waveguide and the flat waveguide are sent out by the same signal source, the electric field vectors are superposed at the position of the square waveguide port, the electric field vectors are distributed into a rotating field, and therefore radiation is achieved through the feed source, and circular polarization wave radiation is achieved.
It should be understood that the above description of the embodiments of the present patent is only an exemplary description for facilitating the understanding of the patent scheme by the person skilled in the art, and does not imply that the scope of protection of the patent is only limited to these examples, and that the person skilled in the art can obtain more embodiments by combining technical features, replacing some technical features, adding more technical features, and the like to the various embodiments listed in the patent without any inventive effort on the premise of fully understanding the patent scheme, and therefore, the new embodiments are also within the scope of protection of the patent.
Furthermore, for the purpose of simplifying this description, this patent may not list some common embodiments, which will occur to those skilled in the art after understanding the present patent, and obviously, these embodiments should be included in the scope of the patent protection.
For the purpose of simplifying the description, the foregoing embodiments may be disclosed with technical details only to the extent that a person skilled in the art can make a decision at his or her discretion, that is, technical details not disclosed for the foregoing embodiments, and the person skilled in the art can be completely completed with the help of published documents such as textbooks, tool books, papers, patents, audio-visual products, etc., without any inventive work, at the full suggestion of the technical solution of this patent, or the details can be decided by himself or herself according to the actual situation, as commonly understood by a person skilled in the art. It is obvious that the technical details are not disclosed, and the full disclosure of the patent technical scheme is not influenced.
In general, any embodiment falling within the scope of the claims of this patent is intended to be within the scope of this patent, in combination with the interpretation of the patent specification and the scope of the claims.
Claims (10)
1. A waveguide polarization conversion device is characterized by comprising a waveguide cavity and a microwave dielectric plate (1) positioned in the waveguide cavity; the waveguide cavity (2) is formed by sequentially connecting a square waveguide (3), a flat waveguide (4) and a rectangular waveguide (5); the microwave dielectric plate is parallel to the flat waveguide, is positioned in the square waveguide and extends to the flat waveguide.
2. The waveguide polarization conversion device according to claim 1, wherein the cross section of the inner cavity of the flat waveguide is rectangular, and the long side dimension of the inner cavity is the same as that of the inner cavity of the square waveguide; and a thin sheet clapboard (8) is also arranged at the central position in the flat waveguide and divides the tail end of the flat waveguide into an upper cavity and a lower cavity.
3. A waveguide polarization conversion device according to claim 2, wherein a slot (7) for holding a microwave dielectric plate is provided at the front end of the thin sheet partition plate, and a rectangular opening (6) is provided at one side wall of the slot; the tail end of the microwave dielectric plate is positioned in the clamping groove and is provided with a rectangular gap (16) superposed with the rectangular opening.
4. A waveguide polarization conversion device according to claim 3, wherein the rectangular waveguide is connected with the flat waveguide and has a cavity with a rectangular opening, and the other cavity of the flat waveguide is terminated with a short circuit structure; the size of the long edge of the inner cavity of the rectangular waveguide is the same as that of the long edge of the inner cavity of the flat waveguide, and the height of the rectangular waveguide is the same as that of the cavity with the rectangular opening of the flat waveguide and is the standard waveguide wide-edge size corresponding to the working frequency band.
5. A waveguide polarization conversion device according to claim 4, wherein a copper clad metal pattern is provided on the surface of said microwave dielectric plate; the metal copper clad pattern comprises a metal ground, a radiation oscillator and a guiding unit.
6. A waveguide polarization conversion device according to claim 5, wherein said metal ground comprises two pieces, which are respectively located on two surfaces of the microwave dielectric plate and are mirror-symmetrical with respect to the microwave dielectric plate; and partial outer end structures of each metal ground are positioned in the clamping grooves, two rows of metal through holes (17) which are the same as the extending direction of the square waveguide are respectively arranged at the two sides of each metal ground, and the metal through holes are connected with the metal grounds (18) on the two surfaces of the microwave dielectric plate.
7. A waveguide polarization conversion device according to claim 5, wherein said two radiating elements are located on two surfaces of the microwave dielectric plate, respectively, and are mirror-symmetrical with respect to the microwave dielectric plate.
8. A waveguide polarization conversion device according to claim 5, wherein the guiding units comprise three guiding units, which are a first circular patch guiding unit (9), a second circular patch guiding unit (10) and a third circular patch guiding unit (11) in the order of size from small to large, the centers of the guiding units are on the geometric center line of the surface of the microwave dielectric slab and are in the same direction as the extension direction of the square waveguide; the guiding units are all arranged on the same surface of the microwave dielectric plate, are positioned at the top end of the radiation oscillator, and are a first circular patch guiding unit, a second circular patch guiding unit and a third circular patch guiding unit from top to bottom in sequence.
9. A waveguide polarization conversion device according to any one of claims 6 to 8, wherein the radiation oscillator comprises a radiation oscillator arm and a T-shaped strip line matching branch (13), a T-shaped notch (15) is arranged at the center position of the inner end of the metal ground, the same T-shaped strip line matching branch is arranged in each T-shaped notch, and the two T-shaped strip line matching branches extend to the corresponding radiation oscillator arm (14) through the parallel double lines (12).
10. A waveguide polarization conversion device according to claim 9, wherein said radiating dipole arms are angled at 60 ° from their corresponding parallel twin lines.
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| CN202010820380.9A CN111864316A (en) | 2020-08-14 | 2020-08-14 | Waveguide polarization conversion device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097740A (en) * | 2021-04-08 | 2021-07-09 | 上海航天测控通信研究所 | Double-frequency transmitting-receiving shared double-circular polarization feed source |
| CN113193343A (en) * | 2021-04-27 | 2021-07-30 | 中国电子科技集团公司第三十八研究所 | Ka frequency channel compact type high-efficiency broadband dual-circularly-polarized antenna |
| CN113782965A (en) * | 2021-09-28 | 2021-12-10 | 维沃移动通信有限公司 | Screen assembly and electronic equipment |
-
2020
- 2020-08-14 CN CN202010820380.9A patent/CN111864316A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097740A (en) * | 2021-04-08 | 2021-07-09 | 上海航天测控通信研究所 | Double-frequency transmitting-receiving shared double-circular polarization feed source |
| CN113193343A (en) * | 2021-04-27 | 2021-07-30 | 中国电子科技集团公司第三十八研究所 | Ka frequency channel compact type high-efficiency broadband dual-circularly-polarized antenna |
| CN113193343B (en) * | 2021-04-27 | 2022-03-18 | 中国电子科技集团公司第三十八研究所 | Ka frequency channel compact type high-efficiency broadband dual-circularly-polarized antenna |
| CN113782965A (en) * | 2021-09-28 | 2021-12-10 | 维沃移动通信有限公司 | Screen assembly and electronic equipment |
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