Title :
A design and fabrication of bandpass filter using miniaturized microstrip square SIR
Author :
Nam, Hun ; Lee, Hyeonjin ; Lim, Yeongseog
Author_Institution :
Electron. Eng. Dept., Chonnam Nat. Univ., Kwangju, South Korea
Abstract :
A four-pole quasi-elliptic function bandpass filter of 1.95 GHz center frequency with 60 MHz bandwidth for IMT-2000 is designed and fabricated using the miniaturized square stepped impedance resonator (SIR). The nonuniform finite difference time domain (NUFDTD) method is used to design the resonator and to calculate the coupling coefficient of three basic structures. The size reduction of miniaturized square SIR resonator is about 50% compared with a square open loop resonator. A bandpass filter using this resonator show good microwave characteristics with harmonic suppression of about -19 dB at 4.76 GHz. The results of measurements are almost similar to those of simulation
Keywords :
band-pass filters; elliptic filters; finite difference time-domain analysis; microstrip filters; microstrip resonators; microwave filters; poles and zeros; 1.95 GHz; 4.76 GHz; 60 MHz; IMT-2000; NUFDTD; coupling coefficient; cross coupling; four-pole filter; microstrip bandpass filter; microstrip resonator; miniaturized square SIR; nonuniform finite difference time domain; quasi-elliptic function filter; size reduction; stepped impedance resonator; Band pass filters; Circuit simulation; Coupling circuits; Fabrication; Finite difference methods; Maxwell equations; Microstrip filters; Microstrip resonators; Microwave filters; Resonator filters;
Conference_Titel :
TENCON 2001. Proceedings of IEEE Region 10 International Conference on Electrical and Electronic Technology
Print_ISBN :
0-7803-7101-1
DOI :
10.1109/TENCON.2001.949622
