Title :
Band pass filters for ultra wideband systems
Author :
Bonache, J. ; Gil, I. ; García-García, J. ; Martín, F. ; Marqués, R. ; Sorolla, M.
Author_Institution :
Departament d´´Enginyeria Electronica, Autonomous Univ. of Barcelona, Bellaterra, Spain
Abstract :
In this work, a new type of planar band pass filters with application in ultra wideband systems is proposed. The devices consist on microstrip lines with complementary split ring resonators (CSRR) etched on the ground plane, and shunt connected stubs. Coupling between adjacent resonators is achieved by means of λ/4 lines, acting as impedance inverters. To illustrate the potentiality of the proposed approach a 3-stage prototype band pass filter with 90% fractional bandwidth has been designed. By cascading two additional CSRR to the filter in order to reject the first and second spurious bands, it is found that the filter exhibits very good out-of-band performance with 30dB suppression up to three times the central filter frequency.
Keywords :
band-pass filters; cascade networks; electromagnetic coupling; microstrip filters; microstrip resonators; ultra wideband communication; CSRR; cascading; complementary split ring resonators; coupling; ground plane; impedance inverters; microstrip lines; planar band pass filters; shunt connected stubs; ultra wideband systems; Band pass filters; Bandwidth; Etching; Impedance; Inverters; Microstrip resonators; Optical ring resonators; Prototypes; Resonator filters; Ultra wideband technology;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1551892
