Title :
A modified circle dual-mode bandpass filter with tuning slot
Author :
Yang, C.F. ; Tzou, W.C. ; Chen, Y.C. ; Lee, T.H. ; Cheng, P.-S.
Author_Institution :
Dept. of Electron. Eng., Chinese Air Force Acad., Kaohsiung, Taiwan
Abstract :
One circle-type patch and two circle-type patches with square slot on Al2O3 substrate are proposed, simulated, fabricated, and measured for planar dual-mode bandpass filters with microwave frequency design. The proposed structures consist of 50 Ω microstrip lines, one for input and another for output. The two 50 Ω microstrip lines are connected to the central of adjacent sides of the patch with two notches, and the patch will act as the elliptic-function bandpass filters. Our measured results show that the Al2O3 substrate presents a number of attractive features for practical application.
Keywords :
band-pass filters; circuit tuning; elliptic filters; microstrip filters; microstrip lines; notch filters; 50 ohm; Al2O3; Al2O3 substrate; circle-type patch; dual-mode bandpass filter; elliptic-function bandpass filters; microstrip lines; microwave frequency design; notches; square slot; tuning slot; Band pass filters; Bandwidth; Dielectric losses; Dielectric substrates; Frequency measurement; Insertion loss; Microstrip filters; Microwave measurements; Resonant frequency; Resonator filters;
Conference_Titel :
Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002. 2002 3rd International Conference on
Print_ISBN :
0-7803-7486-X
DOI :
10.1109/ICMMT.2002.1187878
