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Novel bilateral frequency selecting surface having sudden drop characteristic

A frequency selective surface, double sideband technology, applied in the microwave field, can solve the problems of high manufacturing cost, inability to carry out fast and effective design, complex structure, etc., to speed up the design process, improve the frequency selection characteristics, and improve the selection performance.

Inactive Publication Date: 2008-10-15
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to improve the selection characteristics, double-sided media loading and multi-layer plane cascading are the most commonly used methods, but this leads to high manufacturing costs, and the structure is relatively complex and cannot be designed quickly and effectively

Method used

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  • Novel bilateral frequency selecting surface having sudden drop characteristic
  • Novel bilateral frequency selecting surface having sudden drop characteristic
  • Novel bilateral frequency selecting surface having sudden drop characteristic

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Embodiment Construction

[0019] Such as figure 1 and 2 As shown, the novel frequency selective surface with double sideband steep drop characteristics includes a Rogers5880 dielectric substrate 7 with a thickness of 1.0 mm. The two sides of the dielectric substrate 7 are coated with metal layers, which are the upper metal layer 1 and the lower metal layer 6 respectively. Through the upper metal layer 1 , the dielectric substrate 7 and the lower metal layer 6 , multiple groups of through holes with a diameter of 1 mm are periodically opened, and the inner walls of the through holes are plated with a metal layer to form metallized through holes 2 . Each group of metallized through holes 2 is arranged as two adjacent squares, respectively forming a high-frequency substrate-integrated waveguide cavity 3 with a side length of 21.2 mm and a low-frequency substrate-integrated waveguide cavity 5 with a side length of 22 mm. The hole spacing of the metallized through holes 1 on each side of the waveguide cavi...

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Abstract

The invention relates to a novel frequency selective surface with steep drop characteristic in both sides thereof. In the traditional frequency selective surface, the problems of low selectivity, poor performance stability and large volume exist. The novel frequency selective surface is characterized in that: metal layers are plated on both surfaces of a dielectric substrate; plated-through holes arranged in the patterns of large or small square groups run through the whole dielectric substrates to form a variety of high-frequency and low-frequency substrate integrated waveguide cavity groups; same square-shaped coupling gaps are etched for the upper and the lower metal layers in the adjacent high-frequency and low-frequency cavity. Compared with the general dual-band frequency selective surface formed by periodic patches or gaps of different sizes, since a cavity resonant mode is introduced into the new structure, the novel frequency selective surface with steep drop characteristic in both sides thereof realizes the steep drop characteristic of both sides of passbands and greatly improves the selection characteristic of the passbands, with excellent stability to the angles and the polarizability of incident waves.

Description

technical field [0001] The invention belongs to the field of microwave technology, and relates to a novel frequency selective surface with double-sided band steep drop characteristics based on substrate integrated waveguide technology, which can be used as a frequency band multiplexer and widely used in wireless communications such as satellite communications and weapon platform radars. System applications. Background technique [0002] Frequency selective surfaces (FSS) are widely used in engineering applications. FSS has good selectivity for the transmission and reflection of electromagnetic waves. It has all-pass characteristics for electromagnetic waves in its passband, and total reflection characteristics for electromagnetic waves in its stopband. It has a spatial filtering function. In the microwave field, FSS can be used in the frequency band multiplexer of the communication satellite system, and the communication capacity can be expanded by using multi-feed configur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/207H01P1/20H01P5/12H01P11/00
Inventor 罗国清孙玲玲
Owner HANGZHOU DIANZI UNIV
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