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Center frequency and bandwidth switchable substrate integrated waveguide filters

Published online by Cambridge University Press:  16 October 2019

Fei Cheng ,
Ping Lu Open the ORCID record for Ping Lu [Opens in a new window]  and
Kama Huang
Fei Cheng
Affiliation:
Key Laboratory of Wireless Power Transmission Ministry of Education, College of Electronics and Information Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
Ping Lu*
Affiliation:
Key Laboratory of Wireless Power Transmission Ministry of Education, College of Electronics and Information Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
Kama Huang
Affiliation:
Key Laboratory of Wireless Power Transmission Ministry of Education, College of Electronics and Information Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
*
Author for correspondence: Ping Lu, E-mail: pinglu90@scu.edu.cn
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Abstract

This paper presents center frequency and bandwidth switchable substrate integrated waveguide filters loaded with PIN diodes. The diodes are added in the slot on the surface of the resonators to switch the resonant frequencies and the coupling coefficients. Although the introduction of the slot causes extra radiation loss, it is small and acceptable. The proposed center frequency switchable filter has four center frequency switchable states of 1.78, 1.82, 1.88, and 1.91 GHz, while the bandwidth only changes ±0.64%. The bandwidth switchable filter has two states with 3 dB bandwidths of 70 and 103 MHz at a center frequency of 2.08/2.09 GHz. The measured performance of the fabricated filters shows good agreement with the simulation.

Keywords

PIN diodesubstrate integrated waveguideswitchable
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 12 , Issue 4 , May 2020 , pp. 282 - 287
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019

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