Triple-Mode Bandpass Filter Based on Silver-Loaded Ring-Shaped Dielectric Resonator

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

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Original languageEnglish
Pages (from-to)789-791
Journal / PublicationIEEE Microwave and Wireless Components Letters
Issue number9
Online published24 Jul 2018
Publication statusPublished - Sep 2018


In this letter, a triple-mode bandpass filter based on a hollow silver-loaded ring-shaped dielectric resonator (RSDR) is designed by combining a dominant TE01δ mode with a high-order degenerate HE11δ pair. Because of the distinct E-field distribution, the frequencies of the HE11δ pair can be pulled down and split using a loaded silver segment on top of a dielectric. Moreover, the silver segment has a negligible effect on TE01δ  and higher order TM01δ  modes, implying separation between a passband and adjacent interferers. To validate the methodology, a prototype silver-loaded RSDR is excited by the two L-type feeding probes to satisfy the requirements of coupling strengths for different modes.

Research Area(s)

  • HE11δ pair, ring-shaped dielectric resonator (RSDR), silver segment, triple-mode bandpass filter