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Invisible circularly-polarized planar folding Cassegrain antenna and design method thereof

A Cassegrain antenna, circular polarization technology, applied in folded antenna, antenna, design optimization/simulation, etc.

Active Publication Date: 2021-06-04
AIR FORCE UNIV PLA
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  • Abstract
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  • Application Information

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Problems solved by technology

At present, the RCS of the stealth combat platform itself has been well controlled, but the RCS of the loaded platform antenna system has become a prominent source of the overall RCS

Method used

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  • Invisible circularly-polarized planar folding Cassegrain antenna and design method thereof
  • Invisible circularly-polarized planar folding Cassegrain antenna and design method thereof
  • Invisible circularly-polarized planar folding Cassegrain antenna and design method thereof

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Embodiment Construction

[0049] The technical solution of the present invention will be further described below with reference to the accompanying drawings:

[0050] 1, focus super surface design

[0051] First, the design of the focus hypermathered super material structure has focused and changed rotation function under the left-handed circular polarization wave excitation, such as figure 2 (a) shown. It is well known that when the circular polarization wave is incident on the metal plane, the reflection wave rotates changes. To simultaneously focus on the focus function, we designed a double-layer metal patch reflective super surface unit, such as image 3 (a) shown. The super surface unit consists of two layers of square metal patchs and the underlying metal backplane, and the three-layer metal is spaced from two-layer dielectric plates. The ultra-surface cell cycle is p = 14 mm, the intermediate layer square metal patch edge length is a, the upper layer square metal patch side length is 0.9 * a, the tw...

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Abstract

The invention belongs to the technical field of invisible antennas, and particularly relates to an invisible circularly-polarized planar folding Cassegrain antenna and a design method thereof. The antenna is composed of a focusing metasurface serving as a main reflection face, a rotation direction selection metamaterial serving as an auxiliary reflection face and a circular polarization horn feed source. The focusing metasurface is composed of a plurality of metasurface units, and each focusing metasurface unit is composed of two layers of square metal patches and a bottom layer metal backboard. The rotation direction selection metamaterial is composed of two kinds of square super units arranged in a chessboard mode. The two kinds of square super units are formed by periodically repeating r*r meta-material units in the x direction and the y direction respectively; each metamaterial unit is formed by vertically stacking two same dielectric blocks with clockwise spiral winding metal strips; the antenna can directionally radiate high-gain right-handed circularly polarized plane waves under the excitation of a left-handed circularly polarized horn feed source; and the antenna has the advantages of high gain, low RCS, low profile and the like, and has an excellent stealth function.

Description

Technical field [0001] The present invention belongs to the technical field of stealth antenna, and in particular to a circularly polarized plane folding cals Glenn and its design methods capable of realizing low RCS. Background technique [0002] Stealth techniques refer to a technique that is difficult to detect by enemy radar systems by effectively controlling the target itself, and avoids tracking, identifying, and attacking a technique of tracing, identifying, and attacking. Radar cross-section is an important parameter measuring the target electromagnetic scattering. The reduced target scattering, reducing the target detection probability, reducing the target detection probability, reducing the target detection probability to achieve radar invasive effects in the Radar Cross Section, Radar Cross Section, RCS. [0003] The antenna is a special sour source, and its basic function is to transmit and receive electromagnetic waves, which is an indispensable part of the aircraft ...

Claims

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Application Information

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IPC IPC(8): H01Q1/08H01Q15/00G06F30/20
CPCH01Q1/08H01Q15/0086G06F30/20
Inventor 许河秀王少杰王朝辉王明照王彦朝
Owner AIR FORCE UNIV PLA
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