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Title: A loop resonator tunable filter using phase shifters
Authors: Taslimi, A.
Mouthaan, K. 
Keywords: analog phase shifter
loop resonator
tunable filter
Issue Date: 2010
Citation: Taslimi, A.,Mouthaan, K. (2010). A loop resonator tunable filter using phase shifters. Asia-Pacific Microwave Conference Proceedings, APMC : 686-689. ScholarBank@NUS Repository.
Abstract: A novel tunable bandpass loop resonator filter with three tunable loop resonators is presented. Each resonator is tuned through a phase shifter. This phase shifter not only is the tuning component of the quasi-elliptic filter, it also reduces the total size of the filter by reducing the size of the resonators. The size of the fabricated resonators is only 36% of the size of the traditional square loop resonators at the center of frequency range (850 MHz). The fabricated filter has a tuning range of 20% (765 MHz939 MHz). The filter insertion loss is from 4.1 dB to 1.8 dB and the return loss is better than 20 dB for all the states. The 3 dB bandwidth is changing from 166 MHz to 171 MHz which is almost constant. In addition, the filter shape is constant for all states and the filter has a high out of band rejection. © 2010 IEICE Institute of Electronics Informati.
Source Title: Asia-Pacific Microwave Conference Proceedings, APMC
ISBN: 9784902339222
Appears in Collections:Staff Publications

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