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NCUEIR > College of Engineering > eedept > Periodical Articles > Item 987654321/10291

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/10291

Title:	Stepped Impedance Hairpin Design of a Tunable Bandpass Filter with Harmonic Suppression
Authors:	Chen, Y.-W.;Ho, Min-Hua
Contributors:	電子工程學系
Keywords:	Tunable filter;Stepped impedance hairpin;Harmonic suppression;Zero assignment
Date:	2006-04
Issue Date:	2012-05-22T06:27:06Z
Publisher:	Wiley
Abstract:	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.
Relation:	Microwave and Optical Technology Lett., 48(4): 697-701
Appears in Collections:	[eedept] Periodical Articles

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