Vol. 64

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2016-12-12

Design of an Interdigital Band-Pass Filter for Out-of-Band Rejection Improvement

By Weiping Li, Xin Cao, Haodong Lin, and Zong-Xi Tang
Progress In Electromagnetics Research Letters, Vol. 64, 105-110, 2016
doi:10.2528/PIERL16102605

Abstract

In this letter, an interdigital band-pass filter is proposed for out-of-band rejection improvement. Seven quarter-wavelength resonators are employed to form the passband. Three extra transmission zeros (TZs) on both sides of the passband are implemented by introducing source-load coupling and dumbbell defected ground structures (DGS). As demonstrated by the measured results, out-of-band rejection and selectivity are improved by these three TZs, and good performances are achieved. The proposed method of increasing out-of-band rejection is feasible and applicable in the design of modern microstrip filters.

Citation


Weiping Li, Xin Cao, Haodong Lin, and Zong-Xi Tang, "Design of an Interdigital Band-Pass Filter for Out-of-Band Rejection Improvement," Progress In Electromagnetics Research Letters, Vol. 64, 105-110, 2016.
doi:10.2528/PIERL16102605
http://jpier.org/PIERL/pier.php?paper=16102605

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