Broadband Spatially Combined Amplifier Array Using Tapered Slot Transitions in Waveguide

Abstract

Most reported spatially combined or quasioptical amplifier arrays exhibit resonant narrowband performance (<10%) and have not addressed thermal management issues. We report a waveguide-based spatial combining scheme using broadband tapered-slot transitions, capable of realizing full waveguide band coverage (40% fractional bandwidth) with good thermal properties. An X-band prototype using eight mediumpower GaAs monolithic microwave integrated circuits (MMIC’s) produced an output power of 2.4 W and 9-dB power gain at 1-dB compression, with a combining efficiency of 68% and < 1-dB gain variation over the full waveguide band (8–12 GHz).

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Cite this paper

@inproceedings{Alexanian1998BroadbandSC, title={Broadband Spatially Combined Amplifier Array Using Tapered Slot Transitions in Waveguide}, author={Angelos Alexanian}, year={1998} }