CN109616721B - Miniaturized circular polarizer - Google Patents
Miniaturized circular polarizer Download PDFInfo
- Publication number
- CN109616721B CN109616721B CN201811494201.6A CN201811494201A CN109616721B CN 109616721 B CN109616721 B CN 109616721B CN 201811494201 A CN201811494201 A CN 201811494201A CN 109616721 B CN109616721 B CN 109616721B
- Authority
- CN
- China
- Prior art keywords
- pins
- square waveguide
- pin
- waveguide cavity
- circular polarizer
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/165—Auxiliary devices for rotating the plane of polarisation
- H01P1/17—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation
-
- 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
Landscapes
- Polarising Elements (AREA)
Abstract
The invention discloses a miniaturized circular polarizer, which comprises a flange, a square waveguide cavity and a large-diameter pin set, wherein the flange is arranged at two ends of the square waveguide cavity; arranging equal-depth cutting angles on the edges of the square waveguide cavities where the pin sets are located; arranging equal-depth cutting angles on the edges of the square waveguide cavities without the pins; the pin set comprises at least one group of pins, the group of pins comprises an even number of pins with equal length, and the distances between adjacent pins in the pin set are unequal. The square waveguide cavity is formed by machining an aluminum block, and the gradual change chamfer, the equal depth chamfer and the equal depth chamfer are machined by an electric spark machining method. The insertion depth of the pins in the pin set on the edge of the square waveguide cavity is gradually reduced from the middle to the two ends. The technical scheme provided by the invention achieves the technical effects of reducing the size of the circular polarizer and reducing the processing limitation.
Description
Technical Field
The invention relates to a miniaturized circular polarizer, in particular to a Ku frequency band wide-band large-diameter unequal-spacing pin loading miniaturized circular polarizer.
Background
The waveguide circular polarizer is a key component of a circular polarization reflector antenna feed system, and has the main function of converting linear polarization signals into circular polarization signals. The structural form of the waveguide circular polarizer directly determines the volume, weight and electrical property of the feed horn. Common circular polarizers are in the structural forms of phase shifting elements such as square waveguides or circular waveguides, membranes, ridges, pins or dielectric plates and the like inserted into the square waveguides or the circular waveguides, and the structural forms of slotting the symmetrical walls of the circular waveguides, cutting corners of the square waveguides and directly transitioning the circular waveguides to the elliptical waveguides are also in the structural forms of slotting the symmetrical walls of the circular waveguides.
For a square waveguide circular polarizer inserted with a pin phase shifting element, the performance of the polarizer mainly depends on the number N of pins, the radius R of the pins, the distance S between the pins and the height H of the pins. The number of pins N is the key to design the polarizer, and when the number of pins is small, the standing wave is difficult to adjust. As the number of polarizer pins increases, the standing wave characteristic is improved and the phase characteristic of the polarizer is also improved, but when the number of pins is excessive, the total length of the polarizer is too long. In order to provide good standing wave and phase characteristics for the circular polarizer, the number of pins needs to be as large as possible. The radius R of the pin is an important factor in tuning the circular polarizer, and is usually chosen according to empirical formula: d =0.053 λ. For the ku band, the wavelength λ of the band is small, and the pin diameter is calculated to be 0.89mm according to an empirical formula. This dimension is small and can only be achieved with high machining precision, resulting in a too high machining cost.
The pin spacing S of the circular polarizer has a large effect on the standing wave, so the number of pins should be selected to meet the optimum standing wave characteristics. When the number of the pins is large, the pin pitch selection range is large. When the number of pins is the same, the wider the bandwidth, the narrower the suitable pin pitch range, and the excessive number of pins makes the total length of the polarizer too long. The choice of pin spacing is particularly important when the number of pins is small. In the prior art, equal pin spacing is often selected for ease of design.
In order to ensure good performance of the circular polarizer, a larger number of pins with smaller radius and equal spacing are generally used in the prior art. This results in a long circular polarizer and a high requirement for machining accuracy.
In view of the above, the present invention is directed to a miniaturized circular polarizer, which reduces the size of the circular polarizer and the processing limitation of the circular polarizer.
Disclosure of Invention
In order to alleviate the disadvantages of the prior art, the present invention is directed to a miniaturized circular polarizer.
A miniaturized circular polarizer comprises a flange, a square waveguide cavity and a pin set, wherein the flange is installed at two ends of the square waveguide cavity, the pin set is arranged on an edge of the square waveguide cavity, a gradual change chamfer is arranged at the edge of the square waveguide cavity where the pin set is located, and the gradual change chamfer is arranged at a near end opening of the square waveguide cavity; setting a first equal-depth cutting angle at the edge of the square waveguide cavity where the pin set is located; performing second equal-depth corner cutting on the edge of the square waveguide cavity without the pin; the pin set comprises at least one group of pins, the group of pins comprises an even number of pins with equal length, the diameter of the pins is larger than the calculated value of the empirical formula, and the distances between the adjacent pins in the pin set are unequal.
Furthermore, the square waveguide cavity is formed by machining an aluminum block.
Further, the gradual change chamfer, the first equal depth chamfer and the second equal depth chamfer are processed by adopting an electric spark machining method.
Further, the insertion depth of the pins in the pin set on the edge of the square waveguide cavity is gradually reduced from the middle to the two ends.
Further, the pins are symmetrically distributed on the edge of the square waveguide cavity by taking the group as a unit.
Further, the pin diameter in the pin set is set to 2 mm.
Furthermore, the pins in the pin set are firmly welded by soldering.
Further, the number of pins in the set of pins is 18.
The invention has the following beneficial effects:
the technical scheme provided by the invention can have the following beneficial effects: the circular polarizer provided by the invention comprises a flange, a square waveguide cavity and a pin set, wherein the flange is arranged at two ends of the square waveguide cavity; setting a first equal-depth cutting angle at the edge of the square waveguide cavity where the pin set is located; performing second equal-depth corner cutting on the edge of the square waveguide cavity without the pin; the pin set comprises at least one group of pins, the group of pins comprises an even number of pins with equal length, and the distances between adjacent pins in the pin set are unequal.
Through selecting the loading of major diameter pin, utilize the unequal interval arrangement of pin, set up gradual change corner cut and isobathic corner cut, realized circular polarizer miniaturization. The performance is ensured, the limitation on processing is reduced, and the use requirement is met.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are one embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a circular polarizer according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a three-dimensional explosion structure of a circular polarizer according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a corner cut with a pin after a flange is removed for a circular polarizer according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a corner cut without a pin after a flange is removed from a circular polarizer according to an embodiment of the present invention;
FIG. 5 is a schematic side view of a circular polarizer according to an embodiment of the present invention with a flange removed;
FIG. 6 is a schematic diagram of a metal pin of a circular polarizer according to an embodiment of the present invention with a flange removed;
fig. 7 is a schematic diagram illustrating unequal-spacing arrangement of pins of a circular polarizer according to an embodiment of the present invention after a flange is removed.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a flange; 2. a square waveguide cavity; 3. a metal pin; 4. a first set of two pairs of pins of equal length; 5. a second set of two pairs of pins of equal length; 6. a third set of two pairs of pins of equal length; 7. a fourth two pairs of pins of equal length; 8. a fifth set of equilong pins; 9. the end of the edge near the end where the pin is located is gradually chamfered; 10. a first equal-depth cutting angle is formed on the edge where the pin is located; 11. the second equal depth cutting angle of the edge without the pin.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and the described embodiments are some, but not all embodiments of the present invention.
As shown in fig. 1 and fig. 2, a miniaturized circular polarizer 1 according to an embodiment of the present invention includes a flange 1, a square waveguide cavity 2, and a pin set 3, where the flange 1 is installed at two ends of the square waveguide cavity 2, and the pin set 3 is disposed at an edge of the square waveguide cavity 2.
In an alternative embodiment, the square waveguide cavity 2 is machined from an aluminum block.
As shown in fig. 3 and 4, a gradual change chamfer 9 is arranged at the edge of the square waveguide cavity 2 where the pin set 3 is positioned, and the gradual change chamfer 9 is arranged at the near port of the square waveguide cavity 2; arranging a first equal-depth cut angle 10 at the edge of the square waveguide cavity 2 where the pin set 3 is located; and a second equal-depth cut angle 11 is arranged at the edge of the square waveguide cavity 2 where no pin is positioned.
In an alternative embodiment, the taper angle 1, the taper cut angle 9, the first equal undercut angle 10, and the second equal undercut angle 11 are machined by electrical discharge machining.
As shown in fig. 5 and 6, the pin set 3 includes at least one set of pins, and the set of pins includes an even number of pins with equal length, the diameter of the pins is larger than the calculated value of the empirical formula, and the distances between adjacent pins in the pin set 3 are not equal. The insertion depth of the pins in the pin set 3 on the edge of the square waveguide cavity 2 is gradually reduced from the middle to the two ends. The pins are symmetrically distributed on the edge of the square waveguide cavity 2 by taking the group as a unit.
In an alternative embodiment, as shown in fig. 6, the number of pins in the set of pins 3 is set to 18. The set of pins 3 comprises 5 sets of pins: a first group of two pairs of pins with equal length 4, a second group of two pairs of pins with equal length 5, a third group of two pairs of pins with equal length 6, a fourth group of two pairs of pins with equal length 7 and a fifth group of pins with equal length 8, and nine pairs of 18 pins are provided. The fifth group in the middle has the deepest insertion depth on the edge of the square waveguide cavity 2, and the insertion depths of the pins in the fifth group from the middle to the two ends are gradually reduced. A pair of pins 8 with equal length in the fifth group in the middle are used as symmetry, and the pins on the two sides are symmetrically distributed by taking the group as a unit.
In another alternative embodiment, the circular polarizer is applied to a Ku frequency band, the wavelength λ of the frequency band is small, the diameter of the pin is calculated according to an empirical formula to be less than 1mm, preferably 0.89mm, and the processing difficulty is large. The diameter of the pin is 2mm, which is larger than the calculated value of an empirical formula, and the pin is easy to process.
In yet another alternative embodiment, the pins in the pin set 3 are soldered and fixed to the edges of the square waveguide cavity 2.
As shown in fig. 7, the total length of the polarizer is 50mm, achieving the technical effect of miniaturization. On the other hand, the distances S1, S2, S3, and S4 of adjacent pins are not equal.
It should be noted that the embodiments of the present invention are applied to the technical field of converting a linearly polarized wave into a circularly polarized wave. When the electric field vector of the linearly polarized wave is input in the direction forming an angle of 45 degrees with the axis of the pin set 3, the electric field vector is decomposed into two components with equal size which are respectively vertical and parallel to the axis of the pin set 3, and the electric field component of the pin set 3 vertical to the axis is equivalent to a parallel inductive susceptance, so that the phase of the electric field component is advanced; the electric field component parallel to the axis is equivalent to a parallel capacitive susceptance, so that the phase of the electric field component in the direction is delayed. Under the condition of selecting the diameter of the metal pin, the height of the metal pin is adjusted, the adjacent metal pins are arranged at unequal intervals, and the phase difference of two orthogonal components is 90 degrees. The square waveguide cavity 2 is provided with a first equal-depth chamfer 10 at the edge where the pin is positioned, a second equal-depth chamfer 11 at the edge where the pin is not positioned and a gradual-change chamfer 9 at the end of the near end of the edge where the pin is positioned, so that the ideal matching of the ports is improved. After the linearly polarized electric field passes through the polarizer, when the phase difference between the linearly polarized electric field and the polarizer is 90 degrees, the circularly polarized wave with good axial ratio characteristic and good matching characteristic is synthesized.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A miniaturized circular polarizer comprises a flange (1), a square waveguide cavity (2) and pin sets (3), wherein the flange (1) is arranged at two ends of the square waveguide cavity (2), and the two rows of pin sets (3) are respectively arranged on the spaced edges of the square waveguide cavity (2),
arranging a gradual change chamfer (9) and a first equal depth chamfer (10) at the edge of the square waveguide cavity (2) where the pin set (3) is located, wherein the gradual change chamfer (9) is arranged at the near end opening of the square waveguide cavity (2); the first constant-depth chamfer (10) is arranged between the two gradual-change chamfers (9); arranging a second equal-depth cut angle (11) at the edge of the square waveguide cavity (2) without the pin set (3); each row of pin set (3) comprises at least one group of pins, the group of pins comprises an even number of pins with equal length, and the distances between adjacent pins in the pin set (3) are unequal.
2. The circular polarizer according to claim 1, wherein the square waveguide cavity (2) is formed by machining an aluminum block.
3. The circular polarizer according to claim 1, wherein the taper cut angle (9), the first equal depth cut angle (10) and the second equal depth cut angle (11) are machined by electric discharge machining.
4. The circular polarizer according to claim 1, wherein the insertion depth of the pins in the pin set (3) at the edge of the square waveguide cavity (2) decreases from the middle to the two ends.
5. The circular polarizer according to claim 1, wherein the at least one set of pins is symmetrically distributed in groups on the edges of the square waveguide cavity (2).
6. The circular polarizer according to claim 1, wherein the pin diameter in the pin set (3) is set to 2 mm.
7. The circular polarizer according to claim 1, wherein the pins in the set of pins (3) are secured by soldering.
8. The circular polarizer according to claim 1, characterized in that the number of pins in the set (3) of pins is 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811494201.6A CN109616721B (en) | 2018-12-07 | 2018-12-07 | Miniaturized circular polarizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811494201.6A CN109616721B (en) | 2018-12-07 | 2018-12-07 | Miniaturized circular polarizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109616721A CN109616721A (en) | 2019-04-12 |
| CN109616721B true CN109616721B (en) | 2021-08-06 |
Family
ID=66007591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811494201.6A Active CN109616721B (en) | 2018-12-07 | 2018-12-07 | Miniaturized circular polarizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109616721B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113540818B (en) * | 2021-07-07 | 2023-03-07 | 中国电子科技集团公司第五十四研究所 | Machining method of small high-precision deep-cavity four-ridge waveguide circular polarizer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4162463A (en) * | 1977-12-23 | 1979-07-24 | Gte Sylvania Incorporated | Diplexer apparatus |
| US4672334A (en) * | 1984-09-27 | 1987-06-09 | Andrew Corporation | Dual-band circular polarizer |
| CN201327860Y (en) * | 2008-12-03 | 2009-10-14 | 中国航天科技集团公司第五研究院第五〇四研究所 | Circular polarizer with pre-settable phase shifting curve |
| CN102403555A (en) * | 2010-09-17 | 2012-04-04 | 电子科技大学 | Double-frequency-range broadband circular-polarization device |
| CN102637923A (en) * | 2012-04-16 | 2012-08-15 | 中国电子科技集团公司第十研究所 | Debugging-free circular waveguide screw circular polarizer |
| CN105470657A (en) * | 2016-01-26 | 2016-04-06 | 成都赛纳赛德科技有限公司 | Compact circular polarizer with variable gaps between metal bodies |
-
2018
- 2018-12-07 CN CN201811494201.6A patent/CN109616721B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4162463A (en) * | 1977-12-23 | 1979-07-24 | Gte Sylvania Incorporated | Diplexer apparatus |
| US4672334A (en) * | 1984-09-27 | 1987-06-09 | Andrew Corporation | Dual-band circular polarizer |
| CN201327860Y (en) * | 2008-12-03 | 2009-10-14 | 中国航天科技集团公司第五研究院第五〇四研究所 | Circular polarizer with pre-settable phase shifting curve |
| CN102403555A (en) * | 2010-09-17 | 2012-04-04 | 电子科技大学 | Double-frequency-range broadband circular-polarization device |
| CN102637923A (en) * | 2012-04-16 | 2012-08-15 | 中国电子科技集团公司第十研究所 | Debugging-free circular waveguide screw circular polarizer |
| CN105470657A (en) * | 2016-01-26 | 2016-04-06 | 成都赛纳赛德科技有限公司 | Compact circular polarizer with variable gaps between metal bodies |
Non-Patent Citations (1)
| Title |
|---|
| Ultra-broadband low axial ratio corrugated quad-ridge polarizer;Abdelwahed. Tribak等;《2009 European Microwave Conference (EuMC)》;20091030;论文第73-76页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109616721A (en) | 2019-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107342454B (en) | Waveguide slot array antenna | |
| CN109314314B (en) | Array antenna | |
| US11095009B2 (en) | Partial dielectric loaded septum polarizer | |
| CA2950993A1 (en) | Compact bipolarization excitation assembly for a radiating antenna element and compact array comprising at least four compact excitation assemblies | |
| US20030006866A1 (en) | Waveguide group branching filter | |
| EP3333968B1 (en) | A directional coupler and a method of manufacturing thereof | |
| CN109616721B (en) | Miniaturized circular polarizer | |
| WO2021034270A1 (en) | A linear-to-circular polarizer, feeding network, antenna and antenna assembly | |
| CN103746158A (en) | Waveguide multiplexer | |
| CN117060090B (en) | Broadband circularly polarized planar integrated feed source transmission array antenna | |
| WO2018161689A1 (en) | Cavity type band-stop filter and radio frequency device | |
| JP2005065040A (en) | Triple mode band pass filter | |
| JP6031999B2 (en) | Polarization separation circuit | |
| CA2361541C (en) | Circular waveguide polarizer | |
| CN115732873A (en) | Ultra-wideband thin-sheet 90-degree twisted waveguide | |
| CN115332817A (en) | Broadband terahertz partition plate circular polarizer without resonance | |
| JP2007259046A (en) | Waveguide termination | |
| JP4502967B2 (en) | Polarization converter | |
| US4922213A (en) | Polarizers with alternatingly circular and rectangular waveguide sections | |
| CN110707433B (en) | High-power-capacity slotted circular waveguide circular polarizer and machining method thereof | |
| CN210379358U (en) | High-power capacity slotted circular waveguide circular polarizer | |
| CN215732186U (en) | Broadband dual-polarized cross-shaped oscillator and antenna | |
| CN103730737B (en) | A kind of wedge shape gradual change waveguide cavity circular polarizer of compact conformation | |
| CN115548616B (en) | Structural element, structural system and circuit system of terahertz circuit | |
| WO2016143094A1 (en) | Polarized wave separation circuit |
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 |