Revista: IEEE Microwave & Wireless Components Letters, [see also IEEE Microwave & Guided Wave Letters]. Vol. 15. Pp. 530-532. August 2005

Autores: Roberto Gómez-García and José I. Alonso

A new class of sharp-rejection, low insertion-loss wide-band planar filters is presented in this letter. The proposed
filter topology uses transversal signal-interference filtering sections made up of two transmission-line segments connected in parallel. Thus, under signal-interaction principles, the filtering action comes about through the generation of multiple out-of-band power transmission zeros and constructive in-passband signal combinations. Design equations and guidelines to adjust both the bandwidth and the out-of-band performance of the filtering response through the design parameters of the transversal section are also provided. Furthermore, the theoretical results are validated with the manufacture and characterization of an ultra-wideband microstrip filter prototype at 5 GHz.