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Dual‐band dielectric resonator bandstop filters
Author(s) -
Awasthi Seema,
Biswas Animesh,
Akhtar Mohammed Jaleel
Publication year - 2015
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.20860
Subject(s) - band stop filter , center frequency , multi band device , microwave , return loss , resonator , dielectric resonator , bandwidth (computing) , filter (signal processing) , prototype filter , physics , dielectric , m derived filter , electronic engineering , band pass filter , optoelectronics , topology (electrical circuits) , electrical engineering , computer science , engineering , optics , filter design , telecommunications , low pass filter , antenna (radio)
This article presents the design and implementation of a new asymmetric dual‐band bandstop filter using TE01δ mode dielectric resonator (DR) technology. The coupling matrix is generated by frequency transformation technique applied to advance filtering functions for direct‐coupled asymmetric dual‐band bandstop filter in cul‐de‐sac configuration. The proposed approach provides control of all the major parameters such as center frequencies, intercavity couplings, and input/output couplings of filter independently in both the designated bands. The dual‐band DR filters (2 × 2) pole, with return loss = 15 dB and percentage rejection bandwidth of 1.6 and 0.6% in two bands, at 9.96 and 10.15 GHz, respectively, are designed, built, and tested. The measured and simulated results are in good agreement over the desired band. © 2014 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:282–288, 2015.