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Compact wideband multi-section quarter-wave-like transformers

Author

Listed:
  • Thanatcha Satitchantrakul
  • Prayoot Akkaraekthalin
  • Rardchawadee Silapunt
  • Danai Torrungrueng

Abstract

This paper proposes a novel design technique of the compact wideband transformer based on the quarter-wave-like transformer (QWLT) theory and the approximate theory of small reflections (ATSR). The ATSR for multi-section QWLTs is applied for analysing characteristics of multi-section QWLTs. The prototypes of two-section QWLTs operating at 2.4 GHz with 25% physical size reduction, comparing to that of the corresponding of wideband multi-section quarter-wave transformer (QWT), are implemented. It is found that measured results are matched reasonably well with results of the ATSR for multi-section QWLTs. In addition, the two-section QWLT prototypes provide slightly less bandwidth compared to that of the corresponding wideband multi-section QWT.

Suggested Citation

  • Thanatcha Satitchantrakul & Prayoot Akkaraekthalin & Rardchawadee Silapunt & Danai Torrungrueng, 2018. "Compact wideband multi-section quarter-wave-like transformers," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 32(15), pages 1911-1924, October.
    • Handle: RePEc:taf:tewaxx:v:32:y:2018:i:15:p:1911-1924
    DOI: 10.1080/09205071.2018.1482239
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