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題名: | Stepped Impedance Hairpin Design of a Tunable Bandpass Filter with Harmonic Suppression |
作者: | Chen, Y.-W.;Ho, Min-Hua |
貢獻者: | 電子工程學系 |
關鍵詞: | Tunable filter;Stepped impedance hairpin;Harmonic suppression;Zero assignment |
日期: | 2006-04
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上傳時間: | 2012-05-22T06:27:06Z
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出版者: | Wiley |
摘要: | Stepped impedance hairpin resonators (SIHRs) with harmonic suppression and capability of frequency tuning are incorporated into a bandpass filter design. A tapped-in U-shaped feed structure is introduced to suppress harmonics and to reduce the passband insertion losses. The passband flexibility is accomplished by using a pair of tuning varactors. A simple method to implant a zero in the frequency response is also studied herein to further deepen the passband skirt. A 176% (4.32 GHz) stopband bandwidth is observed under more than20-dB band rejection. A measured minimum insertion loss of 1.19 dB is observed for the circuit with absence of the tuning varactors. Using the varactors, this filter has achieved a 22% frequency tuning range with all the insertion losses less than 5 dB. |
關聯: | Microwave and Optical Technology Lett., 48(4): 697-701 |
顯示於類別: | [電子工程學系] 期刊論文
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