Ultra wide band filter based on short circuit branches

An ultra-wideband filter and short-circuit branch technology, applied in waveguide-type devices, circuits, electrical components, etc., can solve the problems of inability to make broadband, steep suppression, poor return loss, etc., and achieve the effect of out-of-band suppression of steepness

CN103311611AInactive Publication Date: 2013-09-18成都赛纳赛德科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-09-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an ultra wide band filter based on short circuit branches. The ultra wide band filter comprises a transmission line inner conductor, a transmission line outer conductor, at least two short circuit branches which consist of metal columns and resonant cavities, and at least four tuning screws. The ultra wide band filter has the advantages that staggered screw are adopted to vary broadband high pass as band pass, so that the parasitic passband is farther, the out-of-band rejection is steep, and the filter is simple to process.
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Description

technical field

[0001] The invention relates to an ultra-wideband filter based on short-circuit stubs, in particular to an ultra-wide-band filter composed of strip lines and short-circuit stubs. The filter becomes a wideband bandpass filter. Background technique

[0002] A strip line short-circuit stub filter can form a wide-band high-pass filter when the length center frequency of the short-circuit stub is 1 / 4 waveguide wavelength, and the distance between adjacent short-circuit stubs is 1 / 2 waveguide wavelength. The high-end return loss of the traditional stripline short-circuit stub high-pass filter is relatively poor. This stripline short-circuit stub type cannot make a broadband bandpass filter, making its suppression very steep. In the present invention, a broadband band-pass filter is made by using interleaving screws, so that the parasitic pass-band is relatively far away, and the out-of-band suppression is very steep. Contents of the invention

[0003] The objec...

Examples

Embodiment

[0017] Such as figure 1 , 2 As shown, a short-circuit stub-based ultra-wideband filter includes a transmission line and at least two short-circuit stubs connected to the transmission line. The transmission line is mainly composed of a transmission line outer conductor 2 and a transmission line inner conductor arranged inside the transmission line outer conductor 2 1; the short-circuit stub is mainly composed of a resonant cavity 4 and a metal column 3 arranged inside the resonant cavity 4; the resonant cavity 4 is placed along one or both sides of the transmission line outer conductor 2 and connected to the transmission line outer conductor 2 One end of the metal column 4 is connected with the end of the resonance cavity 4 away from the transmission line outer conductor 2, and the other end is connected with the transmission line inner conductor 1; the upper surface and the lower surface of the transmission line outer conductor 2 are all along the transmission line outer condu...