Narrowband FSS filter

A filter and narrow-band technology, which is applied in the field of waveguide filters, can solve problems such as difficult to make narrow-band filters, and achieve the effects of miniaturization design, guaranteed processing accuracy, and flexible design

Inactive Publication Date: 2009-12-16
成都赛纳赛德科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively strong coupling between the metal diaphragm resonator and the connected waveguide, this structure is only suitable for broadband filters, and it is difficult to make a narrowband filter with a relative bandwidth lower than 10%.

Method used

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Embodiment 1

[0027] Such as figure 1 with figure 2 As shown, the narrowband FSS filter includes a waveguide 1, a resonant metal diaphragm 2 and a coupling metal diaphragm 3, wherein the resonant metal diaphragm 2 and the coupling metal diaphragm 3 are alternately arranged in the cavity of the waveguide 1, and are connected with the waveguide 1 The inner walls of the upper, lower, left, and right sides are connected, and the longitudinal length of the connecting waveguide between the resonant metal diaphragm 2 and the coupling metal diaphragm 3 is less than one-third of the width of the waveguide. As shown in Figure 5, the resonant metal diaphragm 2 is provided with a wide coupling hole 5 that is only connected to the inner wall of the waveguide 1 in one direction of the cross section of the waveguide 1, so that the resonant metal diaphragm 2 forms a concave metal diaphragm with wide coupling The width of the hole is greater than its height; as shown in Figure 6, the coupling metal diaphr...

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Abstract

The invention discloses a narrowband FSS filter which comprises a waveguide, a resonant metal diaphragm and a coupling metal diaphragm. The resonant metal diaphragm and the coupling metal diaphragm are vertical to the longitudinal direction of the waveguide and are connected with four surfaces: upper surface, lower surface, left surface and right surface of the waveguide; the filter is characterized in that the resonant metal diaphragm and the coupling metal diaphragm are lengthways arranged along a filter in an interlacing manner. A coupling hole connected with an inner wall of the waveguide only in one direction of the waveguide cross section is arranged on the two metal diaphragms. The invention can meet low passband interpolation loss, high out-band rejection and the requirements on compact appearance design within a relative narrower bandwidth range. The invention has the characteristics of flexible design, simple structure and convenient process, is mainly used in the electrical system with varying microwave wave bands, and is especially applied to military and civil fields such as radar, antenna-feed system, missile guidance, communication and the like.

Description

technical field [0001] The invention relates to a waveguide filter, in particular to a narrow-band FSS filter. Background technique [0002] In 2006, Rosa-Maria Barrio-Garrido et al reported a compact waveguide filter [IEEE MTT-S International Microwave SymposiumDigest, June 2006, pp 250-253]. The filter consists of several metal resonant diaphragms connected in series. The transmission response of the filter is controlled by the position and size of the coupling hole on the metal diaphragm on the cross-section of the resonator. Because the coupling between the metal diaphragm resonant cavity and the connected waveguide is relatively strong, this structure is only suitable for broadband filters, and it is difficult to make a narrowband filter with a relative bandwidth lower than 10%. Contents of the invention [0003] The purpose of the present invention is to provide a narrow-band FSS filter, which increases out-of-band suppression, improves performance, simplifies the ...

Claims

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Application Information

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IPC IPC(8): H01P1/20H01P1/207
Inventor 高秀晓王清源翟彦芬
Owner 成都赛纳赛德科技有限公司
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