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Multi‐band reconfigurable microwave filter using dual concentric resonators
Author(s) -
Kingsly Saffrine,
Kanagasabai Malathi,
Mohammed Gulam Nabi Alsath,
Subbaraj Sangeetha,
Panneer Selvam Yogeshwari,
Natarajan Rajesh
Publication year - 2018
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21290
Subject(s) - resonator , prototype filter , m derived filter , filter (signal processing) , electronic engineering , pin diode , bandwidth (computing) , constant k filter , mechanical filter , microwave , waveguide filter , acoustics , butterworth filter , materials science , computer science , optoelectronics , low pass filter , physics , diode , electrical engineering , engineering , telecommunications
This article presents the design and testing of a novel frequency reconfigurable microwave filter. The filter structure is composed of an all stop resonator coupled with C‐ and E‐shaped parasitic resonators. PIN diodes are located at suitable positions to achieve multi‐band reconfiguration from 1.2 to 3.2 GHz making the filter suitable for multiple wireless communication systems. The frequency and bandwidth of the filter are governed by the length of the resonators and coupling between the resonators and the transmission line, respectively. A sharp rejection of −30 dB is observed between the passbands. The proposed filter offers 56% size reduction with flat group delay performance. The prototype filter is fabricated and the simulation results are validated using experimental measurements. The measurement results show good agreement with the simulation results.