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Design of Compact Wideband Bandpass Filters Based on Multiconductor Transmission Lines With Interconnected Alternate Lines

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3 Author(s)
Sanchez-Martinez, J.J. ; Dept. de Ing. de Comun., Univ. de Malaga, Malaga, Spain ; Marquez-Segura, E. ; Lucyszyn, S.

A new compact wideband bandpass filter consists of one series and one shunt multiconductor transmission-line (MTL) structure with short-circuited alternate lines is proposed. Based on this topology, a three-pole filter with two transmission zeros at the edges of the desired passband, generated by the shunt MTL, and with a wide stopband can be easily designed. Therefore, a comprehensive study of the filter is carried out and useful closed-form design equations are obtained and assessed by means of measurements. A filter is designed, fabricated and measured for validation and excellent agreement between analytical and measured results is obtained.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:24 ,  Issue: 7 )