Title :
New formulas for synthesizing microstrip bandpass filters with relatively wide bandwidths
Author :
Chin, Kuo-Sheng ; Lin, Liu-Yang ; Kuo, Jen-Tsai
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
5/1/2004 12:00:00 AM
Abstract :
New formulas are proposed for designing wideband parallel-coupled microstrip bandpass filters with improved prediction of bandwidth. When a fractional bandwidth Δ is required, a correction θ=(π/2)(1±Δ/2) is incorporated into the formulation for determining the dimensions of each coupled stage. Two filters with Δ=50% are designed and fabricated to show the improvement. The measurement shows a very good agreement with the simulation.
Keywords :
band-pass filters; microstrip filters; bandwidth prediction; microstrip bandpass filters synthesis; parallel-coupled filter; parallel-coupled microstrip bandpass filters; wide bandwidth design; wideband bandpass filters; Admittance; Band pass filters; Bandwidth; Circuit synthesis; Coupling circuits; Frequency; Microstrip filters; Microwave filters; Transmission line matrix methods; Transmission line theory; Parallel-coupled filter; wide bandwidth;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2004.827865
