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Trans-directional coupler with capacitor-shunted ground-defected coupled CPWs and inductor-loaded ACPWs for weak coupling applications

Author

Listed:
  • H.M. Liu
  • Z.B. Wang
  • S.J. Fang

Abstract

Trans-directional (TRD) couplers with capacitor-shunted ground-defected coupled coplanar waveguides (CPWs) and inductor-loaded asymmetric coplanar waveguides are proposed for weak coupling applications. To achieve weak coupling as well as perfect impedance match, unequal shunt capacitors and same series inductors are loaded on the coupled CPWs. In addition, a defected-ground structure is etched under the coupled CPWs for realizing high-impedance coupled lines with the printed circuit board technology. Two TRD couplers with coupling values of 10 and 20 dB are investigated theoretically and experimentally. The measured results show that the directivity of the proposed TRD coupler is better than that of conventional parallel-coupled microstrip-line coupler.

Suggested Citation

  • H.M. Liu & Z.B. Wang & S.J. Fang, 2013. "Trans-directional coupler with capacitor-shunted ground-defected coupled CPWs and inductor-loaded ACPWs for weak coupling applications," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 27(1), pages 104-116, January.
    • Handle: RePEc:taf:tewaxx:v:27:y:2013:i:1:p:104-116
    DOI: 10.1080/09205071.2013.739541
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