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Multichannel interdigital tunable filter based on MEMS switch

An interdigital filter technology, applied in waveguide devices, electrical components, circuits, etc., can solve the problems of complex structure, poor insertion loss, and large size of multi-channel filters, and achieve superior practicability and low insertion loss. , easy to integrate

Inactive Publication Date: 2020-02-11
ZHONGBEI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Multichannel interdigital tunable filter based on MEMS switch
  • Multichannel interdigital tunable filter based on MEMS switch
  • Multichannel interdigital tunable filter based on MEMS switch

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Embodiment

[0036] In the present invention, the filters corresponding to the first output signal line, the second output signal line, the third output signal line, and the fourth output signal line are respectively the first pass filter, the second pass filter, and the third pass filter. pass filter, fourth pass filter, Figure 6 It is the S-parameter simulation diagram of the multi-channel filter of the present invention, such as Figure 6 As shown in (a), the through insertion loss of the first channel filter is 0.99dB@9.3GHz; Figure 6 As shown in (b), the through insertion loss of the second channel filter is 1.39dB@14.2GHz; Figure 6 As shown in (c), the through insertion loss of the third channel filter is 1.07dB@13.7GHz; Figure 6 As shown in (d), the through insertion loss of the fourth channel filter is 0.93dB@10.2GHz.

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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 ...

Claims

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Application Information

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IPC IPC(8): H01P1/203
CPCH01P1/20336
Inventor 吴倩楠韩路路李孟委李强王姗姗张世义
Owner ZHONGBEI UNIV
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