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Title: Microstrip even-mode half-wavelength SIR based I-band interdigital bandpass filter
Authors: Maharjan, Ram Krishna
Kim, Nam-Young
Keywords: Microstrip stepped impedance resonator;Even-mode SIR;Half-wavelength SIR;Interdigital resonators;Bandpass filter;I-band communication systems
Issue Date: Oct-2012
Publisher: NISCAIR-CSIR, India
Abstract: In this paper, a new microstrip interdigital even-mode half-wavelength type stepped impedance resonator (SIR) based bandpass filter (BPF) for I-band applications is presented. The bandpass filter characteristic depends on the self-resonant frequency of the interdigital resonated arms. The combination of the interdigital arm structures behaves as an interdigital capacitance coupling between port 1 and port 2. The self generated capacitive and inductive reactances of the interdigital resonators interacted in order to obtain a resonance at 9.4 GHz. The resonant frequency and the bandwidth of the filter are directly optimized as a result of the physical arrangement of the interdigital resonators. The measured insertion loss (S21) and the return loss (S11) are –0.85 dB and –28.0 dB, respectively, at the 9.4 GHz resonant frequency.
Page(s): 299-303
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.19(5) [October 2012]

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