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A compact dual-band coupler with arbitrary power dividing ratio using broadside-coupled microstrip

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  • L.-Z. Zhang
  • L. Zhou
  • W. Jiang

Abstract

In this paper, a compact dual-band coupler with arbitrary power division ratio using broadside-coupled microstrip has been proposed, designed, and measured. The proposed coupler is formed by two three-section microstrip lines and a common ground plane with three rectangular shaped slots used for coupling. Simple analysis method based on the even-odd mode technique has been applied, design equations are then derived. With the even- and odd-mode characteristic admittances, the initial geometry parameters of the proposed coupler are obtained by using the empirical formulas. The coupler features a wide frequency ratio range, arbitrary power dividing ratio, compact size, and wide bandwidth. For verification purposes, two prototypes of the proposed couplers with a coupling ratio of 3 and 6 dB, operating at the frequency of 2.4/5.2 GHz, have been designed, simulated, fabricated, and measured. Good agreements have been shown between the simulated and the measured results.

Suggested Citation

  • L.-Z. Zhang & L. Zhou & W. Jiang, 2013. "A compact dual-band coupler with arbitrary power dividing ratio using broadside-coupled microstrip," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 27(2), pages 140-148, January.
    • Handle: RePEc:taf:tewaxx:v:27:y:2013:i:2:p:140-148
    DOI: 10.1080/09205071.2013.740784
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