Title :
New elliptic microstrip /spl lambda//4-resonator filters
Author :
Amari, S. ; Hamed, K. ; Antar, Y. ; Freundorfer, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., R. Mil. Coll. of Canada, Kingston, Ont., Canada
Abstract :
Band-pass filters with transmission zeros-at finite frequencies are implemented using λ/4-resonators in microstrip technology. The finite transmission zeros are brought about by open-ended stubs which also provide the correct values of the impedance inverters to achieve the desired in-band return loss. The admittance inverters are implemented through distributed coupling in parallel coupled λ/4 microstrip lines. A second-order filter with two finite transmission zeros is designed to demonstrate the validity of the approach.
Keywords :
band-pass filters; elliptic filters; impedance convertors; microstrip filters; poles and zeros; resonator filters; admittance inverters; band-pass filters; distributed coupling; elliptic microstrip /spl lambda//4-resonator filters; finite transmission zeros; impedance inverters; open-ended stubs; parallel coupled /spl lambda//4 microstrip lines; reflection coefficients; second-order filter; transmission coefficients; Admittance; Band pass filters; Coupling circuits; Filtering theory; Frequency; Impedance; Inverters; Microstrip filters; Microstrip resonators; Resonator filters;
Conference_Titel :
Microwave Conference, 2001. APMC 2001. 2001 Asia-Pacific
Conference_Location :
Taipei, Taiwan
Print_ISBN :
0-7803-7138-0
DOI :
10.1109/APMC.2001.985480
