CN107994347B - Reactance loading meanderline circular polarization grid applied to incidence with large inclination angle - Google Patents
Reactance loading meanderline circular polarization grid applied to incidence with large inclination angle Download PDFInfo
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- CN107994347B CN107994347B CN201711279689.6A CN201711279689A CN107994347B CN 107994347 B CN107994347 B CN 107994347B CN 201711279689 A CN201711279689 A CN 201711279689A CN 107994347 B CN107994347 B CN 107994347B
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- 230000010287 polarization Effects 0.000 title claims abstract description 45
- 239000002184 metal Substances 0.000 claims abstract description 53
- 239000006260 foam Substances 0.000 claims abstract description 30
- 230000005684 electric field Effects 0.000 claims abstract description 5
- 125000006850 spacer group Chemical group 0.000 claims description 27
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- 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
- H01Q15/244—Polarisation converters converting a linear polarised wave into a circular polarised wave
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- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention provides a circular polarization grating which has high circular polarization purity, easy guarantee of processing precision and low polarization loss, and can meet the incidence of a large inclination angle, and the circular polarization grating has the following structure: the first layer of printed board is plated with periodicity the metal grids and the reactance wirings are arranged; the second layer of printed board is plated with a periodically arranged metal grid; the third layer of printed board is plated with a metal grid and reactance wirings which are periodically arranged. The first layer of printed board and the second layer of printed board are separated by foam; the second layer of printed board and the third layer of printed board are separated by foam. The five layers are pressed together. The electric field vector direction forms an included angle of 45 degrees with the meander line metal grid, and after the electric field vector direction passes through the first, second and third layers of printed boards, the linear polarized wave can be changed into a left-handed or right-handed circularly polarized wave.
Description
Technical Field
The invention relates to a meander line circularly polarized grating. In particular to a circular polarization grating which is applied to incidence with a large inclination angle, has high circular polarization purity and small loss, and is easy to ensure the processing precision and generate any circular polarization spin-direction wave.
Background
Circular polarization technology is widely used in satellite communications. The linear polarization mode has higher requirement on the antenna, and in ideal conditions, when the polarization direction of the receiving antenna is consistent with the polarization direction of the signal, the signal receiving capability is strongest, and along with the angle deviation of the receiving antenna and the signal polarization direction, the receiving capability gradually drops to zero. The circularly polarized wave well overcomes the problem, and can well receive signals as long as the polarization form of the receiving antenna is the same as the signal polarization form. In communication systems, circularly polarized wave transmission signals are therefore commonly used.
There are three main methods for forming circularly polarized wave form of antenna: the first method realizes circular polarization, such as a spiral antenna, from the design form of the antenna itself; the second method realizes circularly polarized wave in the feed form of the antenna, and two orthogonal linearly polarized waves are subjected to phase shift superposition to form circularly polarized wave; the third method is to install a circular polarization grating on the radiation port surface of the linear polarization antenna to convert the linear polarization wave into a circular polarization wave.
The first way to realize circularly polarized wave is limited by the antenna form, which limits the application range; the second approach is applicable to small antennas or small array antennas. If the array units are more, the feed network becomes very complex; the third method is particularly suitable for an antenna array with more array elements. The meander line circular polarization grid is a common one in circular polarization grids, and consists of two or more layers of printed boards plated with metal grids, wherein the middle of the printed boards is supported by foam with low loss and small dielectric constant. In recent years, many results have been achieved in the study of circular polarization gratings, but there are few reports on the study of circular polarization realized by incidence at a large inclination angle. In particular, for high tilt angle incidence, there is still a low axial ratio and low loss, so that the meander line circular polarization grating cannot be applied to a phased array antenna, especially a phased array antenna with high angle beam scanning.
Disclosure of Invention
The invention aims to solve the bottleneck problem that the meander line circular polarization grating is only suitable for a specific wave beam or a small-angle incident antenna in the prior art, and provides the meander line circular polarization grating which has high polarization purity, small polarization loss, easy guarantee of processing precision and suitability for large-inclination-angle incident.
The technical solution for realizing the purpose of the invention is as follows:
the utility model provides a reactance loading meander line circular polarization bars for incidence of big inclination, its structure from top to bottom does in proper order: a first layer of printed board (1), an upper layer of foam spacer layer (2), a second layer of printed board (3) a lower foam spacer layer (4) and a third layer printed board (5); wherein,,
the first layer of printed board (1) is plated with a first metal grid (11) and a first reactance routing wire (12) which are arranged according to the period, and the first layer of printed board (1) is arranged at the uppermost part;
a second layer of printed board (3) is plated with a second metal grid (31), and the second layer of printed board (3) is arranged between the upper layer of foam spacer layer (2) and the lower layer of foam spacer layer (4);
the third layer of printed board (5) is plated with a third metal grid (51) and a second reactance routing (52), and the third layer of printed board (5) is arranged below the lower layer of foam spacer layer (4);
a linear polarized wave is emitted into a zigzag linear polarization grid from top to bottom at a certain angle theta, the angle theta is variable, the electric field vector direction forms an included angle of 45 degrees with the metal grid, and the linear polarized wave can be changed into a left-handed or right-handed circular polarized wave after passing through a first layer of printed board (1), an upper layer of foam spacer layer (2), a second layer of printed board (3), a lower layer of foam spacer layer (4) and a third layer of printed board (5).
The geometric dimension of the second metal grid (31) on the second-layer printed board (3) is different from that of the first metal grid (11) on the first-layer printed board (1), and the geometric dimension of the third metal grid (51) on the third-layer printed board (5) is the same as that of the first metal grid (11) on the first-layer printed board (1).
Wherein the second reactance routing (52) on the third layer printed board (5) is different from the first reactance routing (12) on the first layer printed board (1).
Wherein the first reactance wiring (12) on the first layer of printed board (1) is a horizontal inductance wiring, the second reactance routing (52) on the third layer printed board (5) is a vertical capacitance routing.
The thicknesses of the first layer of printed board (1), the second layer of printed board (3) and the third layer of printed board (5) are the same.
Wherein, upper layer foam spacer layer (2) the lower floor foam spacer layer (4) play fixed support effect, and its thickness is the same.
The first reactance routing wire (12) on the first layer of printed board (1) and the second reactance routing wire (52) on the third layer of printed board (5) are respectively the same as the first metal grid (11) on the first layer of printed board (1) and the third metal grid (51) on the third layer of printed board (5) in coating thickness.
Wherein the incidence angle θ of the linearly polarized wave ranges from-75 ° < θ < +75°.
The first, second and third metal grids are meanderline metal grids.
The first layer of printed board (1), the upper layer of foam spacer layer (2), the second layer of printed board (3), the lower layer of foam spacer layer (4) and the third layer of printed board (5) are manufactured independently, and then are pressed and frame-packaged.
Compared with the prior art, the invention has the following beneficial effects: the machining precision is easy to ensure, the machining precision of the metal wiring on each layer of printed board can meet +/-0.1 mm, and the requirements can be easily met in actual machining. The structure is simple, the thickness is only 8.3mm, each layer of printed board is independently processed, and finally, the printed boards are manually pressed together. Is suitable for incidence with large inclination angle. The design concept of the invention is different from the traditional meander line circular polarization grid, and a horizontal inductance type wiring is loaded in a blank area of a first layer plated with a metal grid printed board (1). And a blank area of the metal grid printed board (5) is plated on the third layer, and vertical capacitance type wiring is loaded. The loaded reactance wiring leads the oblique incidence angle to be obviously increased, and the CST three-dimensional electromagnetic simulation software is used for optimizing design, and the result shows that the meander line circular polarization grating is applicable to linear polarization waves with the oblique incidence angle being in any angle within the range of-75 degrees < theta < +75 degrees. The axial ratio is less than 3dB and the polarization loss is less than 1dB in the bandwidth of 8.5 GHz.
Drawings
Fig. 1 is a schematic view of a circularly polarized grid with a meander line for reactive loading applied to high tilt angle incidence.
Fig. 2 is a schematic view of the first layer printed board of fig. 1.
Fig. 3 is a schematic view of the second layer printed board structure of fig. 1.
Fig. 4 is a schematic view of the third layer printed board structure of fig. 1.
Fig. 5 is an axial ratio obtained by simulation of electromagnetic wave incidence at an inclination of 75 °.
Fig. 6 shows S11 obtained by simulation of electromagnetic wave incidence at an angle of 75 °.
Fig. 7 shows the polarization loss obtained by simulation of electromagnetic wave incidence at 75 ° tilt.
Detailed Description
The technical scheme of the invention is further described below with reference to the drawings and the specific embodiments.
Specific embodiments of the invention are described further below with reference to the accompanying drawings, so that those skilled in the art will further understand the invention without limiting the claims thereto.
What needs to be explained is:
the metal grids appearing in the embodiments, the reactive tracks are distinguished by different reference numerals, whereas in the claims reference numerals are not given to a limiting effect, and are therefore written as first metal grids (11) and first reactive tracks (12), second metal grids (31) and second reactive tracks (52), and third metal grids (51) for distinguishing only, in order to further clarify their differences.
Referring to fig. 1 to 4, the reactance loading meander line circular polarization grid applied to incidence with a large inclination angle in the embodiment described below comprises a first layer of printed board (1), an upper layer of foam spacer layer (2), a second layer of printed board (3), a lower layer of foam spacer layer (4) and a third layer of printed board (5), wherein the three layers of printed boards plated with metal wires and the two layers of foam spacer layers have a five-layer structure. The two foam spacer layers in the middle of the three layers of printed boards play a supporting role and have the same thickness. The foam spacer layer dielectric constant was 1.09. The metal grid (51) on the third layer of printed board (5) and the metal grid (11) on the first layer of printed board (1) have the same geometric dimension. But is not the same as the metal grid (31) geometry on the second layer printed board (3). The reactance wirings (12) on the first layer of printed board (1) are horizontal inductance wirings which are periodically distributed among the metal grids (11) and have the same horizontal period as the metal grids (11). The reactance wiring (52) on the third layer of printed board (5) is a vertical capacitance wiring, the reactance wiring is periodically distributed among the metal grids (51), and the horizontal period is the same as the period of the metal grids (51).
Each layer of structure of the reactance loading meander line circular polarization grid applied to incidence with a large inclination angle is independently processed, and after the structure is finished, the structure shown in the figure 1 is manually pressed together, and the periphery of the structure is encapsulated by a frame. When a linear polarized wave is incident at an arbitrary angle of-75 DEG < theta < +75 DEG, the electric field vector direction forms an included angle of 45 DEG with the metal grid, and after passing through the meander line circular polarized grid, the linear polarized wave can be converted into a left-handed or right-handed circular polarized wave. Fig. 5 is an axial ratio obtained by simulation of electromagnetic wave incidence at an inclination of 75 °. Fig. 6 shows S11 obtained by simulation of electromagnetic wave incidence at an angle of 75 °. Fig. 7 shows the polarization loss obtained by simulation of electromagnetic wave incidence at 75 ° tilt.
The foregoing is only a preferred embodiment of the invention. It should be noted that it will be apparent to those skilled in the art that several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be considered as the scope of the present invention.
Claims (7)
1. The utility model provides a reactance loading meander line circular polarization bars that is applied to big inclination incidence which characterized in that: the structure of the device is as follows from top to bottom: the device comprises a first layer of printed board (1), an upper layer of foam spacer layer (2), a second layer of printed board (3), a lower layer of foam spacer layer (4) and a third layer of printed board (5); wherein,,
the first layer of printed board (1) is plated with a first metal grid (11) and a first reactance routing wire (12) which are arranged according to the period, and the first layer of printed board (1) is arranged at the uppermost part;
a second layer of printed board (3) is plated with a second metal grid (31), and the second layer of printed board (3) is arranged between the upper layer of foam spacer layer (2) and the lower layer of foam spacer layer (4);
the third layer of printed board (5) is plated with a third metal grid (51) and a second reactance routing (52), and the third layer of printed board (5) is arranged below the lower layer of foam spacer layer (4);
the first reactance routing (12) on the first layer of printed board (1) is a horizontal inductance routing, the inductance routing is periodically distributed among the first metal grids (11), and the horizontal period is the same as the period of the first metal grids (11); the second reactance wiring (52) on the third layer of printed board (5) is a vertical capacitance wiring, the capacitance wiring is periodically distributed among the third metal grids (51), and the horizontal period is the same as the period of the third metal grids (51);
the first metal grid (11), the second metal grid (31), the third metal grid (51) is a meander line metal grid, the second metal grid (31), the third metal grid (51) is arranged according to the period;
a linear polarized wave is injected into a zigzag linear polarization grid from top to bottom at a certain angle theta, the angle theta is variable, the electric field vector direction forms an included angle of 45 degrees with the metal grid, and after the linear polarized wave passes through a first layer of printed board (1), an upper layer of foam spacer layer (2), a second layer of printed board (3), a lower layer of foam spacer layer (4) and a third layer of printed board (5), the linear polarized wave can be changed into a left-hand or right-hand circular polarized wave, and the angle theta is minus 75 degrees.
2. The reactance loaded meander line circularly polarized grid applied to high tilt angle incidence of claim 1, wherein the second metal grid (31) geometry on the second layer printed board (3) is different from the first metal grid (11) on the first layer printed board (1), and the third metal grid (51) geometry on the third layer printed board (5) is the same as the first metal grid (11) geometry on the first layer printed board (1).
3. The reactance loaded meander line circular polarization grid applied for high tilt angle incidence according to claim 1, characterized in that the second reactance trace (52) on the third layer printed board (5) is different from the first reactance trace (12) on the first layer printed board (1).
4. The reactance loaded meander line circularly polarized grating for high tilt angle incidence according to claim 1, wherein the first layer printed board (1), the second layer printed board (3) and the third layer printed board (5) are the same thickness.
5. The reactance loaded meander line circularly polarized grid for high tilt angle incidence according to claim 1, wherein the upper foam spacer layer (2) and the lower foam spacer layer (4) act as a fixed support and are of the same thickness.
6. The reactance loading meander line circular polarization grid applied to large inclination angle incidence according to claim 1, characterized in that the first reactance routing (12) on the first layer printed board (1) and the second reactance routing (52) on the third layer printed board (5) are respectively the same as the first metal grid (11) on the first layer printed board (1) and the third metal grid (51) on the third layer printed board (5) in coating thickness.
7. The reactance loading meander line circular polarization grating for high tilt angle incidence according to claim 1, wherein the first layer printed board (1), the upper layer foam spacer layer (2), the second layer printed board (3), the lower layer foam spacer layer (4) and the third layer printed board (5) are independently fabricated, and then pressed and frame-packaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711279689.6A CN107994347B (en) | 2017-12-06 | 2017-12-06 | Reactance loading meanderline circular polarization grid applied to incidence with large inclination angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711279689.6A CN107994347B (en) | 2017-12-06 | 2017-12-06 | Reactance loading meanderline circular polarization grid applied to incidence with large inclination angle |
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| Publication Number | Publication Date |
|---|---|
| CN107994347A CN107994347A (en) | 2018-05-04 |
| CN107994347B true CN107994347B (en) | 2023-10-24 |
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| CN201711279689.6A Active CN107994347B (en) | 2017-12-06 | 2017-12-06 | Reactance loading meanderline circular polarization grid applied to incidence with large inclination angle |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113851835B (en) * | 2021-12-01 | 2022-03-11 | 陕西海积信息科技有限公司 | Horizontal omnidirectional circularly polarized antenna |
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|---|---|---|---|---|
| CN201838689U (en) * | 2010-09-07 | 2011-05-18 | 四川九洲电器集团有限责任公司 | Circular polarizer with three layers of fold line grids |
| CN104347957A (en) * | 2013-08-01 | 2015-02-11 | 深圳光启创新技术有限公司 | Meta-material realizing polarization conversion, and polarizer |
| CN105811116A (en) * | 2016-04-13 | 2016-07-27 | 西安电子科技大学 | COS type frequency selective surface based polarization selector and design method therefor |
| CN106025570A (en) * | 2016-06-28 | 2016-10-12 | 江苏赛博防务技术有限公司 | Circular polarizer with beamforming function based on frequency selective surface |
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| CA2443830A1 (en) * | 2001-04-13 | 2002-10-24 | Comsat Corporation | Dual circular polarization flat plate antenna that uses multilayer structure with meander line polarizer |
| US6870511B2 (en) * | 2002-05-15 | 2005-03-22 | Hrl Laboratories, Llc | Method and apparatus for multilayer frequency selective surfaces |
| GB2517290B (en) * | 2013-07-09 | 2016-12-28 | The Sec Dep For Foreign And Commonwealth Affairs | Conductive meander-line and patch pattern for a circular polariser |
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| CN201838689U (en) * | 2010-09-07 | 2011-05-18 | 四川九洲电器集团有限责任公司 | Circular polarizer with three layers of fold line grids |
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