Premium
A compact dual stopband bandstop filter using defected SIR and Hilbert shape fractal structure
Author(s) -
Sarkar Pankaj,
Pal Manimala,
Ghatak Rowdra
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.29808
Subject(s) - stopband , band stop filter , elliptic filter , resonator , microwave , fractal , passband , microstrip , ground plane , insertion loss , transition band , electronic engineering , topology (electrical circuits) , acoustics , filter (signal processing) , prototype filter , engineering , physics , low pass filter , band pass filter , electrical engineering , telecommunications , mathematics , mathematical analysis , antenna (radio)
In this paper, a novel technique is proposed to design a dual band bandstop filter which is implemented with two defected stepped impedance resonators (SIRs) embedded on the input output transmission line. The embedded SIRs create a transmission zero at 2.5 GHz that generates the first stopband of the proposed filter. Introducing two Hilbert shaped fractal structure on the ground plane, the second stop band is employed at 3.5 GHz. The overall layout of the filter is realized with a size of 20 × 5 mm 2 . The proposed prototype is EM simulated and measured. The measured −10 dB bandwidth for first stopband is 0.1 GHz and for second stopband it is 0.14 GHz. The measured S‐parameters exhibit an excellent out off band response with insertion loss less than 1.5 dB. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1345–1347, 2016