Microstrip unequal Wilkinson power divider with 1:11 division ratio

H. Taher and R. Farrell

Journal of Electromagnetic Waves and Applications, 2015, vol. 29, issue 14, 1887-1898

Abstract: In this paper, a 1:11 unequal microstrip Wilkinson power divider (WPD) is presented. Power division is a necessary function in most of the wireless/wireline communication systems. To design 1:11 WPD using an easy-to-fabricate microstrip technology, microstrip line having a very high characteristic impedance (Zc) value of 315 Ω is needed. Realization of this value is impractical because too thin line is required. Defected ground structure (DGS) provides the hosting microstrip line with high inductance and modest capacitance values simultaneously. As a result, very high impedance could be implemented using practical lines. Novel analytical calculation method is developed to compute Zc of microstrip line loaded with DGS. It is found that circular-patterned DGS could be used to realize the required microstrip line. The designed WPD is fabricated and measured at centre frequency (fc) equals 1 GHz. The measurements of insertion and reflection losses of the fabricated circuit as well as the isolation between the output ports are in a good agreement with the simulated responses of the designed circuit.

Date: 2015
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DOI: 10.1080/09205071.2015.1065771

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