Title :
Ultra-wideband (UWB) bandpass filter with three transmission zeros in the notched band
Author :
Sai Wai Wong ; Weiwei Liao ; Kai Wang ; Qing-Xin Chu
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China
Abstract :
A compact ultra-wideband (UWB) bandpass filter (BPF) with three transmission zeros in the notched-band is presented in this paper. A dual coupled microstrip/coplanar waveguide (CPW) structure with slotlines on the bottom are used. The notched-band is generated by a pair of small U-shaped slot-line on the bottom layer and a hollow microstrip resonator on the top layer, and three transmission zeros are achieved at frequency 5.85GHz, 5.9GHz, 5.95GHz without extra circuit size. The UWB bandpass filter (BPF) has been designed, fabricated and measured. The measured results agree with the simulated result closely.
Keywords :
band-pass filters; coplanar waveguides; coupled circuits; microstrip lines; microstrip resonators; microwave circuits; microwave resonators; network synthesis; notch filters; poles and zeros; slot lines; ultra wideband technology; CPW; U-shaped slot-line; UWB BPF; compact ultrawideband bandpass filter; dual coupled microstrip-coplanar waveguide structure; frequency 5.85 GHz; frequency 5.9 GHz; frequency 5.95 GHz; hollow microstrip resonator; notched-band generation; transmission zero; Band-pass filters; Coplanar waveguides; Filtering theory; Microstrip filters; Microwave filters; Passband; Ultra wideband technology; Ultra-wideband; bandpass filters (BPFs); coplanar waveguide (CPW); notched filter; slot-line;
Conference_Titel :
Wireless Symposium (IWS), 2013 IEEE International
Conference_Location :
Beijing
DOI :
10.1109/IEEE-IWS.2013.6616758
