Title :
Parallel Coupled-Line Bandpass Filters With Floating Plate Overlay for Enhanced Coupling and Spurious Suppression
Author :
Chen, Yi-Ping ; Chiang, Yi-Chyun ; Chin, Kuo-Sheng
Author_Institution :
Dept. of Electron. Eng., Chang Gung Univ., Taoyuan
Abstract :
A new type of parallel-coupled microstrip filter is proposed to have wide-band performance and suppress the second harmonic response. The proposed filters are constructed with using floating plate overlays to enhance the coupling between microstrip lines, and compensate the difference in phase velocity under even- and odd-mode excitations. The synthesis method is well developed and the design curves are given. Two Chebyshev filters with fractional bandwidths of 50% and 70%, respectively, were fabricated and measured to validate the design concept. All the measured results agree well with the simulation.
Keywords :
Chebyshev filters; band-pass filters; microstrip filters; Chebyshev filter; floating plate overlay; parallel coupled-line bandpass filter; parallel-coupled microstrip filter; phase velocity; Band pass filters; Bandwidth; Capacitance; Chebyshev approximation; Circuit synthesis; Coupling circuits; Electronic mail; Microstrip filters; Microwave filters; Power harmonic filters; Parallel-coupled microstrip filter; floating plate overlay; spurious response; wide bandwidth;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4554863