CN110190406B - Linear-circular polarization converter based on multilayer frequency selection surface - Google Patents
Linear-circular polarization converter based on multilayer frequency selection surface Download PDFInfo
- Publication number
- CN110190406B CN110190406B CN201910451514.1A CN201910451514A CN110190406B CN 110190406 B CN110190406 B CN 110190406B CN 201910451514 A CN201910451514 A CN 201910451514A CN 110190406 B CN110190406 B CN 110190406B
- Authority
- CN
- China
- Prior art keywords
- layer
- square
- metal
- cut
- circular polarization
- 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
- 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
Abstract
The invention discloses a linear-circular polarization converter based on a multilayer frequency selection surface, which is formed by stacking two dielectric layers, a bonding sheet and three metal layers; the metal layer consists of two layers of square-corner-cutting metal patch layers and a layer of slit-cutting metal cross grid line layer. The invention realizes a better circular polarization axial ratio curve by utilizing the frequency selection surface, obtains a linear-circular polarization converter with higher performance, and is suitable for the technical field of microwaves.
Description
Technical Field
The invention belongs to the technical field of microwaves, and particularly relates to a linear-circular polarization converter based on a multilayer frequency selection surface.
Background
With the continuous development of science and technology, more and more requirements are put forward on the performance of the antenna, compared with the common linear polarization antenna, the circular polarization antenna has superior performance, can better meet the requirements of modern life and communication, and has important application in the fields of satellite communication, electronic investigation and the like.
However, since the microwave device generally generates linearly polarized waves, it is important to design a circular polarizer to realize conversion from linear polarization to circular polarization. Among them, the use of frequency selective surfaces to realize linear-circular polarization conversion is an important research direction. A Frequency Selective Surface (FSS) is a two-dimensional array of patches or slots arranged periodically, which can realize total reflection or total transmission for electromagnetic waves in a specific Frequency band, and is called a "spatial filter". The circular polarization converter is designed by utilizing the performance of in-band total transmission or total reflection, the function of polarization conversion can be met while the performance of the feed source is not influenced or is less influenced, the circular polarization converter designed in the mode can be designed with the feed source respectively, and the design and the manufacture are simple.
Disclosure of Invention
The purpose of the invention is as follows: in view of the above problems, the present invention provides a linear-circular polarization converter based on a multilayer frequency selective surface, which can realize conversion from linear polarization to circular polarization in a wide frequency band.
The technical scheme is as follows: in order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows: a linear-circular polarization converter based on a multilayer frequency selection surface comprises a lower layer of square cutting angle metal patch layer (1), a dielectric layer (2), a slit metal grid line layer (3), a dielectric layer (4), an upper layer of square cutting angle metal patch layer (5) and an adhesive layer (6) between the two dielectric layers; the metal grid wire bonding structure is formed by sequentially arranging a lower metal patch layer (1), a dielectric layer (2), a metal grid wire layer (3), an adhesive layer (6), a dielectric layer (4) and an upper metal patch layer (5); the slit metal grid line cutting layer (3) and the square cutting angle metal patch layer (1) are respectively welded on the upper surface and the lower surface of the dielectric layer (2), and the upper square cutting angle metal patch layer (5) is welded on the upper surface of the dielectric layer (4); the upper surface of the dielectric layer (2) and the lower surface of the dielectric layer (4) are respectively connected through an adhesive layer (6).
Furthermore, the metal patch layers (1) and (5) are composed of m × n metal patch periodic units, the metal grid line layer (3) is composed of m × n grid line periodic units, the unit periods of the three layers of metal are the same, and the centers of the three layers of metal periodic units are aligned and arranged in a rectangular array.
Furthermore, the units in the two metal patch layers (1) and (5) are square metal patches with square corners cut off, and the units in the metal grid line layer (3) are cross grid lines with fine slits cut off at the centers.
Furthermore, the sizes of the units in the upper and lower layers of metal patches are different, and the sizes of the cut square corners are different.
The dielectric constants of the two dielectric layers are both 2.2 and 0.05 lambda0Dielectric sheet of Rogers RT/duroid, lambda0Is an X wave band, i.e. 8GHz-12GHz, a work centerThe frequency is a wavelength of 10 GHz.
The cell period size is approximately 1/6 times the wavelength corresponding to the operating center frequency.
The bonding layer is made of Rogers RO4450F with the relative dielectric constant of 3.52 and the thickness of 0.1 mm.
The two metal patch layers are square metal patches with square corners cut off, and the metal grid line layer is a cross grid line with a slit cut off at the center. The square corner is cut off, namely a square is cut off at the corner of the square metal patch, and the central cut-off slit is a slit which is obliquely cut off at the center of the cross grid line.
Has the advantages that: compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
1. the line-circular polarization converter designed by the invention realizes the conversion from linear polarization to circular polarization by introducing impedance difference in two vertical directions to the patch square-cutting angle and the grid line fine-cutting slit on the basis of a multilayer non-resonant band-pass frequency selection surface theory, has smaller unit size, can arrange more units in a limited size, can reduce the possibility of grid lobes, has wider transmission frequency band and better in-band transmission coefficient, and has smaller influence on the performance of a feed source.
2. The design of the invention is to design the unit size, the patch size, the dielectric layer thickness and the grid line width by an equivalent circuit method on the theoretical basis of the non-resonant band-pass frequency selection surface, the design method is simple, and the same circuit can be used for carrying out design simulation on the frequency selection surfaces working in different frequency bands.
Drawings
Fig. 1(a) and (b) are a side view of a unit structure and a side view of an overall structure of a multi-layer frequency selective surface-based circular polarizer according to the present invention.
The figure includes: 1. a metal patch; 2. a dielectric base layer; 3. a metal gate line; 4. a dielectric base layer; 5. a metal patch; 6. an adhesive layer;
fig. 2(a), (b) and (c) are a lower layer square cutting angle metal patch (1), a slit metal grid line (3) and an upper layer square cutting angle metal patch (5) in sequence;
FIG. 3 is a schematic diagram of the basic operation principle of a multi-layer frequency selective surface-based linear-circular polarization converter designed according to the present invention;
FIGS. 4(a) and (b) are simulation graphs of the transmission coefficient amplitude difference and phase difference in two perpendicular directions of the multi-layer frequency selective surface-based linear-circular polarizer unit according to the present invention;
FIG. 5 is a simulation diagram of axial ratio curves of a linear-circular polarization converter based on a multi-layer frequency selective surface designed according to the present invention.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, the linear-circular polarization converter is composed of a lower square-cutting angle metal patch layer 1, a dielectric layer 2, a slit metal grid line layer 3, a dielectric layer 4, an upper square-cutting angle metal patch layer 5 and an adhesive layer 6 between the two dielectric layers. The sizes of the upper and lower metal patches are different, and the cut square angles are also different. The linear-circular polarization converter works in an X wave band, namely 8GHz-12GHz, the working center frequency is 10GHz, and the periodic size of a frequency selection surface unit forming the linear-circular polarization converter is 5.3mm and is about 0.18 lambda0。
Assuming that when a y-polarized electromagnetic wave is perpendicularly incident on the surface of the linear-circular polarization converter, the electric field can be decomposed into two orthogonal electric field components with equal amplitude and phase
And
namely:
as shown in fig. 3, U, V indicate the direction perpendicular to the tangential direction and the direction parallel to the tangential direction, respectively, and K indicates the wave number in free space.
The transmitted wave electric field after the warp-circular polarization converter can be expressed as:
wherein:
wherein, | TUU|、
Respectively, the amplitude and phase of the transmission coefficient of the U polarized wave when the U polarized wave is incident, | TVV|、
Respectively, the amplitude and phase of the transmission coefficient of the V-polarized wave when the V-polarized wave is incident.
According to the circular polarization theory, when the amplitudes of the transmitted waves in the two perpendicular directions are equal and the phase difference is 90 degrees, the transmitted waves are circular polarized waves, that is:
From simulation angle analysis, the transmission coefficients in two transmission wave directions can be obtained through simulation, and the amplitude and the phase difference of the transmission coefficients
The square corner cut of paster and the lancing of grid line in the design frequency selection surface unit also namely make it satisfy:
|TUU|＝|TVV|
The size of the cutting angle and the width of the cutting slot are designed and adjusted, so that the linear-circular polarizer unit generates different responses to electromagnetic waves in two directions which are perpendicular U, V. When the unit has capacitive effect on the component in one direction and inductive effect on the component in the other direction, the transmitted waves U, V in the two directions have equal amplitude and 90-degree phase difference, so that the conversion from linear polarization to circular polarization is realized.
Specifically, the final size is obtained by the optimized design of the kerf width of the chamfer angle: the side length of the corner cut metal patch layer 1 is ax 4.66mm, the side length of the square corner cut is lx 2.29mm, the side length of the corner cut metal patch layer 5 is ax2 4.86mm, the side length of the square corner cut is lx 2mm 2.32mm, the grid line width of the metal grid line layer 3 is wx 1.03mm, and the kerf width is ws 0.14 mm.
As shown in FIG. 4, in the frequency band (8GHz-12GHz) of the designed cell, the amplitude difference of the transmission coefficients in the U, V two directions is within 3dB, and the phase difference is around 90 degrees.
According to a theoretical calculation formula of the circular polarization axial ratio:
wherein the content of the first and second substances,
a curve of the axial ratio changing along with the frequency can be obtained, as shown in FIG. 5, the AR values of the axial ratios are all within 3dB in the frequency band of 7.6GHz-12.1GHz, the 3dB axial ratio bandwidth reaches 45%, and the axial ratio below 2dB can be reached in the frequency band range of 8.2GHz-11.5 GHz.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (2)
1. A line-circular polarization converter based on a multilayer frequency selection surface is characterized by comprising a lower layer of square-cut angle metal patch layer (1), a first medium layer (2), a slit metal grid line layer (3), a second medium layer (4), an upper layer of square-cut angle metal patch layer (5) and an adhesive layer (6) between the two medium layers; the slit metal grid line layer (3) and the lower-layer square-corner metal patch layer (1) are respectively welded on the upper surface and the lower surface of the first medium layer (2), and the upper-layer square-corner metal patch layer (5) is welded on the upper surface of the second medium layer (4); the bonding layer (6) is respectively connected with the slit metal grid line layer (3) on the upper surface of the first dielectric layer (2) and the lower surface of the second dielectric layer (4); the lower-layer square-cut-angle metal patch layer (1) and the upper-layer square-cut-angle metal patch layer (5) are composed of m multiplied by n metal patch periodic units, the metal grid line layer (3) is composed of m multiplied by n grid line periodic units, the unit periods of the three layers of metal are the same, and the centers of the three layers of metal periodic units are aligned and arranged in a rectangular array; the units in the lower layer square cutting angle metal patch layer (1) and the upper layer square cutting angle metal patch layer (5) are square metal patches with square corners cut off, and the units in the metal grid line layer (3) are cross grid lines with thin slits cut off in the center.
2. The multi-layer frequency selective surface-based linear-circular polarization converter according to claim 1, wherein the sizes of the cells in the upper and lower metal patches are different, and the cut square angles are different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910451514.1A CN110190406B (en) | 2019-05-28 | 2019-05-28 | Linear-circular polarization converter based on multilayer frequency selection surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910451514.1A CN110190406B (en) | 2019-05-28 | 2019-05-28 | Linear-circular polarization converter based on multilayer frequency selection surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110190406A CN110190406A (en) | 2019-08-30 |
| CN110190406B true CN110190406B (en) | 2020-10-30 |
Family
ID=67718280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910451514.1A Active CN110190406B (en) | 2019-05-28 | 2019-05-28 | Linear-circular polarization converter based on multilayer frequency selection surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110190406B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110854543B (en) * | 2019-11-15 | 2021-03-30 | 电子科技大学 | Dual-frequency broadband wide-angle circularly polarized grid based on miniaturized unit |
| CN110911831B (en) * | 2019-11-27 | 2020-10-09 | 西安电子科技大学 | Double-frequency circularly polarized planar transmission array antenna adopting single-wire polarized feed source |
| CN112312755A (en) * | 2020-10-12 | 2021-02-02 | 中国舰船研究设计中心 | X-band full-band electromagnetic pulse protection surface simulation method and protection surface structure |
| CN113113778B (en) * | 2021-04-13 | 2023-01-17 | 中国人民解放军空军工程大学 | Dual-functional super surface based on circularly polarized transflective selective structure and regulation and control method thereof |
| CN113113770B (en) * | 2021-04-30 | 2024-03-19 | 广州智讯通信系统有限公司 | Antenna adopting polarization sensitive molded line-circular polarization converter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638321A (en) * | 2015-01-24 | 2015-05-20 | 西安电子科技大学 | Polarization transformer based on multilayer frequency selection surface |
| CN109786969A (en) * | 2019-01-10 | 2019-05-21 | 电子科技大学 | A kind of low RCS phased array antenna based on load artificial electromagnetic material |
-
2019
- 2019-05-28 CN CN201910451514.1A patent/CN110190406B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638321A (en) * | 2015-01-24 | 2015-05-20 | 西安电子科技大学 | Polarization transformer based on multilayer frequency selection surface |
| CN109786969A (en) * | 2019-01-10 | 2019-05-21 | 电子科技大学 | A kind of low RCS phased array antenna based on load artificial electromagnetic material |
Non-Patent Citations (5)
| Title |
|---|
| A Circularly Polarized Horn Antenna Based on an FSS Polarization Converter;Chunfeng Yang等;《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》;20191216;第19卷(第2期);第277-281页，图1-7 * |
| A Thin and Broadband Linear-to-Circular Polarizer Based on Grid-Patch Structure for Ku-Band;Hao-ming Hu等;《International Journal of Antennas and Propagation》;20181231;第1-6页，图1、6 * |
| Circularly Polarized Microstrip Patch Antenna Array Based on FSS Polarization Converter;Chunfeng Yang等;《2019 International Symposium on Antennas and Propagation (ISAP)》;20191030;第1-3页，图1-6 * |
| Dual-band transmission polarization converter based on planar-dipole pair frequency selective surface;Shen-Yun Wang等;《SCIENTIfIC REPORTS》;20180228;第1-5页，图4 * |
| 宽带平面反射阵和多层频率选择表面研究及其应用;李永久等;《中国博士学位论文全文数据库(信息科技辑)》;20160415;I136-3，正文第73-94页，图5.1-5.18 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110190406A (en) | 2019-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110190406B (en) | Linear-circular polarization converter based on multilayer frequency selection surface | |
| CN108615976B (en) | Radome-based dual-passband/wide-stopband reconfigurable frequency selection surface | |
| CN109193167B (en) | Miniaturized frequency selective surface with low ratio of high resonance point to low resonance point | |
| CN109301444A (en) | Double-fed dual-band dual-circular polarization micro-strip paster antenna | |
| CN112382854B (en) | 5G base station full-duplex ultra-high-isolation dual-polarized MIMO antenna array | |
| CN113451784B (en) | High-performance packaging radiation absorber | |
| CN109713411B (en) | Microstrip dual-frequency broadband filter | |
| CN115296017B (en) | High-efficiency common-caliber strong-coupling ultra-wideband array antenna based on frequency selection surface | |
| CN111769368A (en) | Wave-absorbing and wave-transmitting integrated frequency selection surface based on gap type resonator | |
| CN109560388B (en) | Millimeter wave broadband circularly polarized antenna based on substrate integrated waveguide horn | |
| CA2443829A1 (en) | Two-layer wide-band meander-line polarizer | |
| CN111224242B (en) | Wave-absorbing and wave-transmitting integrated frequency selective surface with anisotropic wave-transmitting band | |
| CN111541031B (en) | Broadband low-profile transmission array antenna and wireless communication equipment | |
| CN112713393A (en) | Slot patch antenna | |
| CN105449354B (en) | A kind of low-cross coupling antenna array using the double via electromagnetic bandgap structures of Fermat archimedean spiral groove line | |
| CN111478035A (en) | Flexible double-stop-band UWB-MIMO antenna based on coplanar waveguide feed | |
| CN115441210B (en) | Self-decoupling circularly polarized filter antenna array | |
| CN208580847U (en) | A kind of high performance communication antenna house that the angle based on strong coupled mechanism is extremely stable | |
| CN107706526B (en) | High-power embedded polarization conversion radome | |
| CN213692338U (en) | Full-duplex ultra-high-isolation dual-polarization MIMO antenna array | |
| CN108777360A (en) | The extremely stable high performance communication antenna house of angle based on strong coupled mechanism | |
| CN112928489A (en) | Broadband high-efficiency transmission type polarization converter | |
| CN219040733U (en) | Millimeter wave frequency band circularly polarized Fresnel lens antenna | |
| CN112234359B (en) | Reflection/absorption surface for terminating filter circuit to control electrical characteristics and design method | |
| CN113794060B (en) | Dual-polarization ultra-wideband three-dimensional electromagnetic wave absorber |
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 |