{"title":"Coupling transducers for magnetoinductive waveguides: Minimising reflection over the whole pass band","authors":"O. Sydoruk","doi":"10.1016/j.metmat.2011.02.003","DOIUrl":null,"url":null,"abstract":"<div><h3>Abstract</h3><p>The characteristic impedance of magnetoinductive waveguides is complex and frequency-dependent, whereas the input impedance of standard RF and microwave devices is real and constant. Transducers capable of coupling magnetoinductive waveguides to other devices are, therefore, required for high-performance magnetoinductive systems. The author designed and experimentally realised a resonant coupling transducer capable of minimising reflections from magnetoinductive waveguides over the whole pass band.</p><p>For a magnetoinductive cable with the resonant frequency of 95<!--> <!-->MHz and the pass band between 73 and 174<!--> <!-->MHz, the experimental value of |<em>S</em><sub>11</sub> <!-->| was as low as −25<!--> <!-->dB at the resonant frequency and about −20<!--> <!-->dB over more than 90% of the pass band, the most broadband performance achieved up to date. Yet, the transducer has simple design and comprises only three resonant circuits, which makes it a promising candidate for wide-band applications.</p></div>","PeriodicalId":100920,"journal":{"name":"Metamaterials","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2011-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.metmat.2011.02.003","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metamaterials","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1873198811000041","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
The characteristic impedance of magnetoinductive waveguides is complex and frequency-dependent, whereas the input impedance of standard RF and microwave devices is real and constant. Transducers capable of coupling magnetoinductive waveguides to other devices are, therefore, required for high-performance magnetoinductive systems. The author designed and experimentally realised a resonant coupling transducer capable of minimising reflections from magnetoinductive waveguides over the whole pass band.
For a magnetoinductive cable with the resonant frequency of 95 MHz and the pass band between 73 and 174 MHz, the experimental value of |S11 | was as low as −25 dB at the resonant frequency and about −20 dB over more than 90% of the pass band, the most broadband performance achieved up to date. Yet, the transducer has simple design and comprises only three resonant circuits, which makes it a promising candidate for wide-band applications.
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