Wu-Nan Chen, Min-Hung Weng, Sung-Fong Lin, Tsung Hui Huang


A pseudo-interdigitalband pass filter using tapped I/O to improve the skirt characteristics is designed and fabricated. In this paper, the method for tuning the frequencies of these transmission zeros is also described. These transmission zeros can be tuned to appear near the passband by both using the technique of the tapped I/O and interstage-coupling. Experimental results of the fabricated filter measured by network analyzer also show a good agreement with the simulation results.

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