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Broadband spatially combined amplifier array using tapered slot transitions in waveguide

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2 Author(s)
Alexanian, A. ; Dept. of Electr. Eng., California Univ., Santa Barbara, CA, USA ; York, R.A.

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 medium-power GaAs monolithic microwave integrated circuits (MMICs) 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)

Published in:

Microwave and Guided Wave Letters, IEEE  (Volume:7 ,  Issue: 2 )

Date of Publication:

Feb 1997

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