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Khajeh-Khalili, Farzad, Honarvar, M. Amin and Virdee, Bal Singh (2018) Miniature in-phase Wilkinson power divider with pair of parallel transmission-lines for application in wireless microwave systems. IETE Journal of Research. pp. 1-29. ISSN 0377-2063
A novel miniature Wilkinson power divider (WPD) design is presented. This is achieved by substituting the quarter-wavelength transmission-lines constituting the WPD with an equivalent pair of parallel transmission-lines (PPTLs) that effectively reduce the circuit size of the WPD by 43% compared with a conventional design whose ground-plane is defected. Particle swarm optimization (PSO) technique is used to achieve size reduction. Meandering the transmission-lines further reduce the WPD size by 22%. The proposed WPD has overall dimensions of 9.38 × 11.51 mm2 or 0.11 λg × 0.14 λg, which is compatible with the requirements imposed by portable personal wireless systems. Coupling between the parallel transmission-lines is shown to extend the operational bandwidth of the power divider to 3.2 GHz (0.8–4 GHz) for a return-loss better than 10 dB.
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