Composite frequency-selective-surface invisible radome

A frequency-selective surface and radome technology, applied in the microwave field, can solve the problems of non-deployment, large incident angle of electromagnetic waves, and difficult process implementation, so as to reduce the difficulty of implementation, reduce backscattering, and reduce RCS.

Inactive Publication Date: 2013-01-16
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The present invention solves the problem that the existing radome has a streamlined shape and cannot be unfolded into a plane, and the preparation of the FSS on the radome is not only difficult in process, but also the incident angle of electromagnetic waves on the FSS is very large, resulting in low transmittance of the FSS passband. problem, providing a composite frequency selective surface stealth radome

Method used

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specific Embodiment approach 1

[0028] Specific implementation mode 1. Combination Figure 1 to Figure 8 Describe this embodiment, a kind of composite frequency selective surface stealth radome, this composite frequency selective surface stealth radome is laminated by the frequency selective surface flexible film on the outer surface of the conical inner cover to form the frequency selective surface inner cover, and then use The special lamination equipment embeds and laminates the frequency selective surface inner cover into the outer radome to form a composite frequency selective surface stealth radome. The frequency selective surface flexible film is composed of a Y ring unit 1, and the Y The ring units 1 are periodically arranged in an equilateral triangle, and the parameters of the periodic arrangement are respectively, the arrangement period Dx of the Y ring unit 1 in the x direction is 7 mm, and the arrangement period Dy in the y direction is 6.062 mm. The period angle α is 60o.

[0029] The structur...

specific Embodiment approach 2

[0032] Specific embodiment two, combine Figure 2 to Figure 8 Describe this embodiment. This embodiment is a method for manufacturing a compound frequency selective surface stealth radome described in Embodiment 1. The specific preparation process is divided into three stages: conical inner cover design, simulation calculation and process preparation. :

[0033] 1. The design stage of the conical inner cover: the design space of the conical inner cover is calculated according to the size of the outer radome, the radar antenna 3 and the scanning angle of the working state of the radar antenna 3. It must be ensured that the FSS conical inner cover is embedded in the antenna and the outer surface. Between the radomes, the normal scanning of the radar antenna 3 is not affected. Then calculate the incidence angle converted into the FSS when the electromagnetic wave is incident on the conical inner cover with different cone angles, and the change range of the incident angle of the ...

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Abstract

The invention discloses a composite frequency-selective-surface invisible radome and relates to the technical field of microwaves. The composite frequency-selective-surface invisible radome solves the problems that an existing radome is streamline in shape and cannot be spread to a plane, random preparation of an FFS (frequency selective surface) on the radome is difficult in process implementation, and FFS passband transmittance is low as incident angles of electromagnetic waves on the FFS are large. The composite frequency-selective-surface invisible radome is prepared by embedding an inner Y-ring-unit frequency-selective-surface conical cover into an outer radome by the aid of special laminating equipment. The composite frequency-selective-surface invisible radome has a band-pass filtering characteristic within a specific radar frequency range and good passband characteristics, is capable of efficiently transmitting through the working frequency range electromagnetic waves, reflects the out-of-band detection electromagnetic waves to a vast space according to the radome shape and reduces backward radar cross section so that invisibility of the radome is achieved. The composite frequency-selective-surface invisible radome can be used for invisibility of radomes of guided missiles and airplanes.

Description

technical field [0001] The invention belongs to the field of microwave technology, in particular to a composite frequency selective surface stealth radome. Background technique [0002] Stealth technology refers to detection technology, which can be divided into radar stealth, infrared stealth, acoustic stealth, and video stealth. The improvement of the stealth performance of weapons and equipment can delay the time of being discovered, weaken the detection and tracking capabilities of early warning systems such as enemy radars, and greatly improve the survivability of one's own targets. Aircraft radar cabins, missile guidance cabins and other observation and sensor equipment are strong radar scattering sources directly in front of the aircraft. The core of radar target characteristic signal control technology is to reduce radar cross section (Radar Cross Section, RCS), and RCS is a symbol of stealth performance. Important indicators. Since the cockpit glass, radome, and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/42H01P1/20
Inventor 梁凤超高劲松徐念喜冯晓国赵晶丽孙连春
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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