UWB (Ultra Wideband) filter capable of switching notch stop band state and ultra-wideband state based on switching principle

Abstract

The invention discloses a UWB (Ultra Wideband) filter capable of switching a notch stop band state and an ultra-wideband state based on a switching principle. The filter comprises multimode resonance patches (101) which are symmetrical on the upper surface of a dielectric substrate, a port patches (102), a micro-strip transmission lines (103), the dielectric substrate (104) and a metal earth plate (105) under the dielectric substrate. The filter utilizes the multimode resonance patches to realize ultra-wideband, and the switching of the notch stop band state and the ultra-wideband state is realized through the existence of a switching patch. The filter has the advantages of simple design structure, compact structure to realize structure micronization, convenience for processing, high realizability, low cost and capability of switching the ultra-wideband state and the notch stop band state at any time. The filter in the invention has an advantage of state switching, the state can be selected at any time as needed, and a great convenience is brought to the actual application of engineering.

Description

Technical field [0001] The present invention relates to a switchable UWB filter with notch stopband and ultra-wideband based on the switching principle. The filter realizes the ultra-wideband filter when the switch is closed and the bandwidth is wider than the UWB standard bandwidth, but when the switch is off In the open state, the filter with notch stopband can filter out unwanted signals according to requirements. The switchable UWB filter with notch stopband and ultra-wideband can change its function at any time according to different needs. Filters have important application value in wireless communication technology and radar systems. Background technique [0002] The switch plays an indisputable role in the circuit, mainly to control the closing and opening of the circuit, and also to use the switch to switch different working circuits. The UWB filter with two states of notch stopband and ultra-wideband is used This feature is designed. The stopband filter can filter out...

AI Technical Summary

Problems solved by technology

[0003] In recent years, there have been many design ideas about filters, such as multimode resonators (MMR), cascaded structures, cross-coupling, etc., but although these structures can achieve filtering effects, they are large in size or poor in selectivity, and only one Design ideas to achieve a function

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