Title :
Design of bandpass filters with parallel three-line coupled microstrips
Author :
Kuo, Jen-Tsai ; Shih, Eric ; Lee, Wei-Cheng
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
Bandpass filters are designed based on parallel coupled three-line microstrip structures. The relation between the circuit parameters of a three-line coupled microstrip section and an admittance inverter is established. A design graph for substrate with εr = 2.2 is provided. Two Chebyshev filters, of order 2 and 1dB passband ripple, with fractional bandwidths 40% and 60% are fabricated and measured. Good agreement between prediction and measurement is obtained
Keywords :
Chebyshev filters; band-pass filters; microstrip filters; network parameters; Chebyshev filters; admittance inverter; bandpass filters; circuit parameters; fractional bandwidths; parallel three-line coupled microstrips; three-line coupled microstrip section; Admittance; Band pass filters; Bandwidth; Chebyshev approximation; Coupling circuits; Impedance; Inverters; Microstrip filters; Microwave filters; Transmission line matrix methods;
Conference_Titel :
Microwave Conference, 2001. APMC 2001. 2001 Asia-Pacific
Conference_Location :
Taipei
Print_ISBN :
0-7803-7138-0
DOI :
10.1109/APMC.2001.985611
