Wideband bandstop filter using an SIR based interdigital capacitor | Zendy

Kim Changsoon | Zendy; Shrestha Bhanu | Zendy; Son Kwang Chul | Zendy

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Wideband bandstop filter using an SIR based interdigital capacitor

Author(s) -

Kim Changsoon,

Shrestha Bhanu,

Son Kwang Chul

Publication year - 2018

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.31385

Subject(s) - return loss , wideband , capacitor , center frequency , bandwidth (computing) , microstrip , insertion loss , resonator , band stop filter , transmission line , electrical impedance , electronic engineering , electrical engineering , materials science , acoustics , engineering , telecommunications , physics , band pass filter , low pass filter , voltage , antenna (radio)

In this article, a microstrip wideband bandstop filter (W‐BSF) with a stepped impedance resonator (SIR)‐based interdigital capacitor (IDC) is proposed. By using an SIR‐based symmetric IDC, a wide rejection of bandwidth of 4.27 GHz at the center frequency of 5.85 GHz can be achieved. The insertion loss ( S 21 ) and return loss ( S 11 ) were 17.89 dB and 0.22 dB at 5.85 GHz, respectively, in the measurement results, which also verified that the bandwidth can be widely tuned by increasing the length, d from the main transmission line to the SIR‐based symmetric IDC section. As a result, we achieved practically applicable simulated and measured S ‐parameter responses. The overall dimension of the optimized W‐BSF was (13.80 × 10.98) mm 2 .

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