PSEUDO-INTERDIGITAL BANDPASS FILTER WITH TRANSMISSION ZEROS

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

Abstract


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.

Full Text:

PDF

References


J. S. Hong and M. J. Lancaster, Development of new microstrip pseudo-interdigital bandpass filters, IEEE Microwave Guided Wave Letter, 5 (1995), 261-263.

C. M. Tsai, S. Y. Lee and C. C. Tai, Hairpin filters with tunable transmission zero, IEEE Trans. Microwave Theory and Tech., MTT-S Digest (2001), 2175-2178.

K. Wada and I. Awai, Heuristic models of half-wavelength resonantor bandpass filter with attenuation poles, Electronic Letters, 35 (1996), 1494-1496.

S. B. Cohn, Microwave Bandpass Filter Containing High-Q Dielectric Resonators, IEEE MTT-16 (1968), 218-227, Apr.

J. S. Hong and M. J. Lancaster, Cross-coupled MicrostripHairpin-Resonator Filters, IEEE Trans. Microwave Theory and Tech., vol.46 No. 1(1998), 118-122 ,July.

J. S. Hong and M. J. Lancaster, Microstrip Filters for RF/Microwave Application, John Wiey and Sons, 2001.


Refbacks

  • There are currently no refbacks.


© Copyright 2007-2016 JMOe Brazilian Microwave and Optoelectronics Society (SBMO) and Brazilian Society of Electromagnetism (SBMag)