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Concentrated configuration type cross-shaped annulus passband frequency selection surface with high angle stability

A frequency-selective surface and cross-ring technology, applied in the microwave field, can solve problems such as low passband transmittance and center frequency point drift, and achieve the effect of short design optimization time, less structural parameters, and meeting engineering application requirements

Inactive Publication Date: 2012-08-15
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the present invention provides a densely arranged cross-ring band-pass frequency selective surface with high angular stability. The characteristics of band stability and high pass-band transmittance solve the problems of center frequency point drift and low pass-band transmittance in engineering applications when incident at large angles

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  • Concentrated configuration type cross-shaped annulus passband frequency selection surface with high angle stability
  • Concentrated configuration type cross-shaped annulus passband frequency selection surface with high angle stability
  • Concentrated configuration type cross-shaped annulus passband frequency selection surface with high angle stability

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0014] A densely arranged cross-ring band-pass frequency selective surface with high angular stability, its basic resonant unit is cross-ring 1, such as figure 1 As shown, the cross rings 1 are periodically arranged in isosceles right triangles to form the densely arranged frequency selective surface, and there are highly symmetrical local periodic units on the entire frequency selective surface, and the local periodic units are arranged periodically in a square grid. Such as figure 2 As shown, there is a complete cross ring 1 at the central point of each local periodic unit, and a quarter cross ring 2 at each vertex belongs to the local periodic unit, that is, there are two equivalent cross rings in a local periodic unit 1. Realize dense arrangement. Design the appropriate size of the cross ring 1 and the period size of the local periodic ...

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Abstract

The invention relates to a concentrated configuration type cross-shaped annulus passband frequency selection surface with high angle stability, which belongs to the technical field of microwave. The frequency selection surface takes a cross-shaped ring as a resonance unit; two equivalent cross-shaped rings exist in one local period unit; a complete cross-shaped ring is arranged at the center point of each local period unit; a quarter of one cross-shaped ring is arranged at each top point of each local period unit; and the distance between every two adjacent centers of the local period units is 0.34-0.36 times the resonant wavelength of an electromagnetic wave. According to the invention, the structural parameters are few; the designed optimization time is short; the frequency selection surface is suitable for big-angle incidence, a central frequency point is hardly drifted when an incidence angle is changed in the range of 0-60 DEG; and with the increase of the incidence angle, the passband transmissivity is reduced slightly, but is still high, and can meet the application requirements on engineering.

Description

technical field [0001] The invention belongs to the field of microwave technology, and in particular relates to a densely arranged cross-ring band-pass frequency selective surface with high angular stability. Background technique [0002] Frequency selective surface (FSS) is a two-dimensional periodic array structure composed of specific shape unit graphics, which has the special ability to adjust and control the transmission of electromagnetic waves, that is, it has the spatial filtering characteristics of selective transmission or reflection of electromagnetic waves , can be divided into band-pass and band-stop frequency selective surfaces. The radome manufactured by frequency selective surface technology can effectively reduce the radar reflection cross section and realize the stealth of the radome. The streamlined structure of the radome designed to meet the aerodynamics makes the frequency selective surface applied on it have a large incident angle and a wide range of ...

Claims

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Application Information

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IPC IPC(8): H01P1/203H01P7/08
Inventor 梁凤超焦健高劲松王岩松陈新
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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