상세정보
학술지
An implementation of harmonic-suppression microstrip filters with periodic grooves
- 저자
- 김봉수, Jae W. Lee, 송명선
- 발행일
- 200409
- 출처
- IEEE Microwave and Wireless Components Letters, v.14 no.9, pp.413-415
- ISSN
- 1531-1309
- 출판사
- IEEE
- 협약과제
- 04MR1200, 전파자원 이용 기반 기술 개발, 김창주
- 초록
- In this paper, a new parallel-coupled-line microstrip band pass filter (BPF) improving the harmonic suppression performance of the second harmonic signal (2fo, twice the passband frequency) is described. It is found that the desired passband performance is improved and the harmonic passband signal is diminished by enforcing the consecutive patterns in coupled-line and increasing the number of grooves to the optimum values. The recalculation of design parameters such as space-gap between lines, line widths and lengths is not required due to the simple modification of the conventional filter by inserting periodic patterns. To evaluate the validity of this novel technique, order-3 Butterworth BPF centered at 2.5 GHz with a 10% fractional bandwidth (FEW) and order-5 Chebyshev BPF centered at 10 GHz with a 15% FBW were used. When five and three square grooves are used, over 30-dB suppression at second harmonic signal is achieved in simulation and experiment. Finally, the comparison between the characteristics of filters with square and semicircular periodic grooves has been carried oat by using the simulated results.
- KSP 제안 키워드
- 10 Ghz, 5 GHz, Band-pass filter(BPF), Coupled line, Fractional Bandwidth(FBW), Microstrip filter, Novel technique, Periodic Pattern, Second harmonic signal, Simulation and experiment, design parameters