An Investigation of Open- and Short-Ended Resonators and Their Applications to Bandpass Filters

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

Detail(s)

Original languageEnglish
Article number5223599
Pages (from-to)2203-2210
Journal / PublicationIEEE Transactions on Microwave Theory and Techniques
Volume57
Issue number9
Publication statusPublished - Sep 2009

Abstract

In this paper, we investigate both open- and short-ended half-wavelength microstrip resonators and their applications to bandpass filter designs. Using voltage-wave analyses, we examine the resonance and coupling properties of these resonators at their fundamental and harmonic frequencies. Loading them with a lumped-circuit element at the locations of zero-voltage point of the second harmonic allows control of fundamental frequency response without altering that of the second harmonic. A resistive loading can suppress the second harmonic while a p-i-n diode loading yield a switchable bandpass filter. The coupling regions between an open-ended resonator and a short-ended resonator of higher order bandpass filters can be chosen such that second-, third-, and fourth-harmonic suppression, as well as dual passband, can be achieved. Simulation and experimental results agree well, validating the proposed bandpass filter design methodology.

Research Area(s)

  • Bandpass filter, Dual-passband filter, Harmonic suppression, Open- and short-ended resonators, Switchable filter

Citation Format(s)

An Investigation of Open- and Short-Ended Resonators and Their Applications to Bandpass Filters. / Le Dai, Gao; Zhang, Xiu Yin; Chan, Chi Hou; Xue, Quan; Xia, Ming Yao.

In: IEEE Transactions on Microwave Theory and Techniques, Vol. 57, No. 9, 5223599, 09.2009, p. 2203-2210.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal