Title :
Microstrip bandpass filters for Ultra-Wideband (UWB) wireless communications
Author :
Hsu, Ching-Luh ; Hsu, Fu-Chieh ; Kuo, Jen-Tsai
Author_Institution :
Dept. of Electron. Eng., Ta Hwa Inst. of Technol., Hsinchu, Taiwan
Abstract :
A new technique is developed for designing a composite microstrip bandpass filter (BPF) with a 3 dB fractional bandwidth of more than 100%. The BPF is suitable for ultra-wideband (UWB) wireless communications. The design utilizes embedding individually designed highpass structures and lowpass filters (LPF) into each other, followed by an optimization for tuning in-band performance. The stepped-impedance LPF is employed to attenuate the upper stopband and quarter-wave short-circuited stubs are used to realize the lower stopband. Two such BPFs are fabricated and measured to demonstrate the performance.
Keywords :
band-pass filters; low-pass filters; microstrip filters; optimisation; ultra wideband communication; 3 dB; BPF; UWB; highpass structures; lower stopband; lowpass filters; microstrip bandpass filters; quarter-wave short-circuited stubs; stepped-impedance LPF; ultra-wideband wireless communications; upper stopband; Band pass filters; Bandwidth; Circuits; Cutoff frequency; Design engineering; Fabrication; Impedance; Microstrip filters; Ultra wideband technology; Wireless communication;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1516698
