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A compact pseudo-interdigital SIR bandpass filter with improved stopband performance

✍ Scribed by Min-Hung Weng; Hung Wei Wu; Cheng-Yuan Hung

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
139 KB
Volume
47
Category
Article
ISSN
0895-2477

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✦ Synopsis

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 3f 0 (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.

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