Multichannel interdigital tunable filter based on MEMS switch

Abstract

The invention belongs to the technical field of tunable filters, and in particular relates to a multichannel interdigital tunable filter based on a MEMS switch. The multichannel interdigital tunable filter comprises a substrate, wherein two single-pole multi-throw switches are fixed to the substrate in a mirrored manner. Each single-pole multi-throw switch includes an input end and at least two output ends. An input signal line is connected to the input end of the single-pole multi-throw switch. An interdigital filter is arranged between the output ends of the two single-pole multi-throw switches. The output ends of the single-pole multi-throw switches are connected with the interdigital filter through output signal lines. Ground wires are arranged on both sides of the input signal line and the output signal lines. The multichannel interdigital tunable filter can reduce an overall system size and switching power consumption, has a high Q value, low insertion loss, low power consumption, high linearity, easy integration, and the like, and has superior practicability in the range of 0-20GHz. The multichannel interdigital tunable filter can realize the multichannel gating of DC-20GHz,and realizes the high integration of the MEMS switch and the filter. The multichannel interdigital tunable filter is used for filtering different frequencies.

Description

technical field [0001] The invention belongs to the technical field of adjustable filters, in particular to a multi-channel interdigital adjustable filter based on MEMS switches. Background technique [0002] Multi-channel tunable filter is a kind of important electronic components that can filter stray or useless signals and have frequency selection function. It is of great significance in realizing channel selection, image suppression, duplexing, and multi-channel communication. Compared with traditional bandpass filters, it can reduce the size of the overall system, reduce switching power consumption, and has the advantages of high Q value, low insertion loss, low power consumption, high linearity, and easy integration. It can be widely used in communication systems, instruments and equipment, radar and weaponry. [0003] At present, domestic institutions that conduct research on multi-channel tunable filters mainly include Nanjing Institute of Electronic Devices, China ...

AI Technical Summary

Problems solved by technology

However, these two multi-channel filters have problems such as complex structure, poor insertion loss, and large volume.

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