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Multi-band bandstop filter and multi-band bandpass filter

A band-stop filter and band-pass filter technology, applied in waveguide devices, electrical components, circuits, etc., can solve the problems of limited double stop bands and difficulty in expanding 3 frequency bands, so as to reduce requirements, reduce sensitivity, The effect of reducing difficulty

Active Publication Date: 2010-06-02
XIAN INSTITUE OF SPACE RADIO TECH
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  • Abstract
  • Description
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Problems solved by technology

And this coupling structure is based on cross-coupling, so it is mainly limited to the design of double stop band
Moreover, this topology is difficult to extend to the design of 3-band and 4-band band-stop filters (hereinafter referred to as 3-band and 4-band)

Method used

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Embodiment

[0047] The design idea of ​​the present invention has been given in detail above. It is mainly based on two dual stopband structures: the first as figure 2 As shown, two groups of resonant cavities are arranged on both sides of the main channel, which is used to design the topology structure of double stop band; the second one is as Figure 8 As shown, the two sets of resonant cavities are on the same side of the main channel ( Figure 8 ), which is used to expand the double stopband into a topology structure of 3 stopbands and 4 stopbands. Next, the two topological structures will be realized through two waveguide structures, the rectangular waveguide and the substrate-integrated waveguide, so as to prove the realizability of the multi-stopband structure proposed by the present invention. Finally, a schematic diagram of the 4-stop-band model based on SIW is given.

[0048] Such as figure 2 For the topology shown, a rectangular waveguide based dual stopband is designed. ...

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Abstract

The invention belongs to a multi-band bandstop filter comprising N resonant cavity groups. N is a the number of bands and is in a closed interval from 2 to 4; the N resonant cavity groups are stacked and aligned to acquire the response of the multi-band bandstop filter; each resonant cavity group comprises n resonant cavities arranged in a line, and n is in a closed interval from 3 to 5; distance among the n resonant cavities belonging to the same resonant cavity group is odd times of a 1 / 4 wavelength; a rectangular waveguide is in a 3 / 4 waveguide wavelength; and the N resonant cavity groups share the same main passage, are parallel to the main passage and are arranged at one side of the main passage or at both sides of the main passage by being arranged in an overlapping way while less than two resonant cavity groups are arranged at either side. The stopbands of the multi-band bandstop filter have good rejection characteristics and inter-stopband passband characteristics so that the multi-band bandpass filter can be designed by applying the structure of the multi-band bandstop filter based on a design idea that a bandpass filter and an N-band bandpass filter are integrated into an N+1-band multi-band bandpass filter.

Description

technical field [0001] The invention belongs to the technical field of microwave communication, and relates to a multi-band band-stop filter topology and a multi-band band-pass filter based on the topology. Background technique [0002] The multi-band band-stop filter (hereinafter referred to as multi-stop band) is a device used to filter out unwanted frequency band signals in the communication channel, while the multi-band band-pass filter (hereinafter referred to as multi-pass band) is used to filter out A device that requires some frequency band signals within a communication channel. [0003] The dual-band band-stop filter (hereinafter referred to as the dual-stop band) is typically a cul-de-sac structure, such as figure 1 shown. It is based on the principle of cross-coupling. Among them, the interval between the 1 cavity and the 8 cavity is an odd multiple of 1 / 4 wavelength. 1. Eight cavities are coupled to the main channel, and the remaining cavities are coupled to...

Claims

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Application Information

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IPC IPC(8): H01P1/208H01P1/209
Inventor 杨飞于洪喜吴须大杨毅民周颖
Owner XIAN INSTITUE OF SPACE RADIO TECH
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