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Dual FET active patch elements for spatial power combiners

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2 Author(s)
Xiao Dong Wu ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA ; Kai Chang

A novel dual-FET active patch antenna element and arrays for quasi-optical power combining are described. The circuit uses two FET's that symmetrically load a split patch antenna. The configuration of the devices decreases H-plane cross-polarization dramatically. The power combining was achieved by injection locking through mutual coupling. An equivalent isotropic radiation power of 0.88 W for a 2-element dual-FET patch antenna array has been obtained. For a 2×2 array, an equivalent isotropic radiated power of 2.99 W was achieved. The circuit is planar and amenable to monolithic circuits

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:43 ,  Issue: 1 )