Design of quadruple-passband microwave filters using frequency transformation

Wei-Chih Lin, Wan-Ling Tsai, Ting-Yi Huang, Ruey-Beei Wu
2011 2011 XXXth URSI General Assembly and Scientific Symposium  
This paper describes a synthesis method for quadruple-passband microwave filters. A frequency transformation method is developed for finding the locations of poles and zeros of the filter response. An eight-pole microstrip quadruple-passband filter is synthesized for validation, with designed pass bands at 1.85-1.88, 1.943-1.97, 2.03-2.057, and 2.12-2.15 GHz. The filter is realized in microstrip and the measured results show good agreement with the theoretical ones.
doi:10.1109/ursigass.2011.6050662 fatcat:r6xh3k4bvbgahjtnsnxplqr2ym