Theory and experiment of novel microstrip slow-wave open-loop resonator filters

Jia-Sheng Hong, Michael J. Lancaster

Research output: Contribution to journalArticlepeer-review

334 Citations (Scopus)


This paper presents the theory and experiment of a new class of microstrip slow-wave open-loop resonator filters. A comprehensive treatment of capacitively loaded transmission line resonator is described, which leads to the invention of microstrip slow-wave open-loop resonator. The utilization of microstrip slow-wave open-loop resonators allows various filter configurations including those of elliptic or quasi-elliptic function response to be realized. The filters are not only compact size due to the slow-wave effect, but also have a wider upper stopband resulting from the dispersion effect. These attractive features make the microstrip slow-wave open-loop resonator filters promising for mobile communications, superconducting and other applications. Two filter designs of this type are described in detail. The experimental results are demonstrated and discussed.
Original languageEnglish
Pages (from-to)2358-2365
Number of pages8
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number12
Publication statusPublished - Dec 1997


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