Adjacent and diagonal coupling mechanism by even-branched resonator for adjustable radiometric filtering applications

Document Type

Article

Publication Date

10-1-2022

Abstract

Radio frequency-based measurement components utilize differently designed resonators to adjust various filtering characteristics. We introduce a unique coupling mechanism of a novel even-branched resonator that alone can adjust 6 radiometric filtering characteristics i.e., bandpass operation, harmonic suppression, quality -factor enhancement, switching ability, tunability, and digitized coupling. In our design, even-branched reso-nators have inter-resonator magnetic coupling while each end of their branch-lines has intra-resonator electrical coupling. Using the prominent magnetic coupling, adjacently coupled-and diagonally coupled-resonators are developed. A short-circuited stepped-impedance parallel technique is applied to achieve enhanced quality-factor and switchable/tunable bandpass filtering features. Characteristics of our radiometric resonator are determined by the odd/even dependency on its branch number. Our resonator couples with its another identical unit only when it has an even number of branches and is coupled by branch-lines that are also even-numbered. With novel digitized coupling characteristics, our resonator provides a 6-in-1 solution for intelligent radiometric systems.

Keywords

Even-branched resonator, Bandpass filter, Quality-factor, Tunable filter, Constant bandwidth

Publication Title

Measurement

Divisions

fac_eng

Funders

Ministry of Higher Education (MOHE) through Fundamental Research Grant Scheme (FRGS) [FRGS/1/2021/TK0/UTEM/02/34]

Volume

202

Publisher

Elsevier

Publisher Location

THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND

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