Abstract
A pseudo-interdigital stepped impedance resonator (SIR) bandpass filter (BPF) using tapped I/O is designed and fabricated. By using a pseudo-interdigital structure and the SIR, the proposed BPF gains advantages of compactness and high selectivity. In this paper, the first and second spurious responses are shifted to higher than 3f0 (the designed center frequency) due to the SIR effect and the effect of using the tapped I/O, and fast passband-edge attenuation is obtained as a result of the transmission zeros in the passband edge created by interstage coupling. The experimental results of the fabricated filter show good agreement with the simulation results. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 462–464, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21200
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