Title :
Compact Broadband Planar Filters
Author :
Menzel, Wolfgang ; Zhu, Lei ; Wu, Ke ; Bogelsack, Frank
Author_Institution :
Microwave Techniques, University of Ulm, D-89069 Ulm, Germany, E-mail: wolfgang.menzel@ieee.org
Abstract :
Based on impedance steps and coupled line sections as inverter circuits, novel wide band and very compact filters are presented. Based on alternately high and low impedances presented to the connected transmission line resonators by these inverters, the resonator lengths are reduced to a quarter wavelength only. Both suspended stripline as well as microstrip filters were designed, fabricated, and tested, proving this concept in an excellent way.
Keywords :
Circuit testing; Coupling circuits; Distributed parameter circuits; Impedance; Inverters; Microstrip filters; Planar transmission lines; Resonator filters; Stripline; Wideband;
Conference_Titel :
Microwave Conference, 2001. 31st European
Conference_Location :
London, England
DOI :
10.1109/EUMA.2001.338962
