Proceedings of the Korea Electromagnetic Engineering Society Conference (한국전자파학회:학술대회논문집)
- 2005.11a
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- Pages.7-12
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- 2005
The Design of Microstrip Band-Selective Filter with Narrow Stopband for UWB Application
협대역 저지 특성을 가지는 UWB용 마이크로스트립 필터 설계
- Roh, Yang-Woon (Department of Electrical and Computer Engineering, Hanyang University) ;
- Hong, Seok-Jin (Department of Electrical and Computer Engineering, Hanyang University) ;
- Jung, Kyung-Ho (Department of Electrical and Computer Engineering, Hanyang University) ;
- Jung, Ji-Hak (Department of Electrical and Computer Engineering, Hanyang University) ;
- Choi, Jae-Hoon (Department of Electrical and Computer Engineering, Hanyang University)
- 노양운 (한양대학교 전자통신컴퓨터공학과) ;
- 홍석진 (한양대학교 전자통신컴퓨터공학과) ;
- 정경호 (한양대학교 전자통신컴퓨터공학과) ;
- 정지학 (한양대학교 전자통신컴퓨터공학과) ;
- 최재훈 (한양대학교 전자통신컴퓨터공학과)
- Published : 2005.11.05
Abstract
A compact microstrip band-selective filter for ultra-wideband (UWB) radio system is proposed. The filter combines the traditional short-circuited stub highpass filter and coupled resonator bandstop filter on both sides of the mitered 50-ohm microstrip line. To realize the pseudo-highpass filtering characteristic over UWB frequency band (3.1 GHz to 10.6 GHz), a distributed highpass filter scheme is adopted. Three coupled resonators are utilized to obtain the band stop function at the desired frequency band. By meandering the coupled resonators, there is 29% reduction in footprint compared to the traditional bandstop filter using L-shaped resonators. The measured results show that the filter has a wide passband of 146.7 % (2.1 GHz to 10.15 GHz) with low insertion loss and the stop band of 7.42 % (5.32 GHz to 5.73 GHz) for 3-dB bandwidth. The measured group delay is less than 0.7 ns within the passband except the rejection band.