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A tunable bandstop filter using triangular patch resonator with defected ground structures
Author(s) -
Pinheiro J.M.,
Serrano A.L.C.
Publication year - 2016
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30182
Subject(s) - varicap , band stop filter , center frequency , resonator , microwave , bandwidth (computing) , filter (signal processing) , electronic engineering , optoelectronics , electrical engineering , engineering , physics , low pass filter , telecommunications , band pass filter , capacitance , electrode , quantum mechanics
A tunable dual‐mode bandstop patch filter with two degrees of liberty controlling the filter's central frequency and bandwidth is presented. The bandstop filter uses a single triangular resonator miniaturized by two slots and two defected ground structures (DGSs) slots to improve rejection. Varactor diodes are used across the patch's slots to vary the frequency of each degenerate fundamental mode. The models used in simulations, varactors assembling, DC bias configuration and measured results are presented. The proposed filter presents 17% of center frequency tuning range in the 5.8 GHz WiMAX band and the fractional bandwidth can be varied from 1.8% to 18%. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2930–2933, 2016