Title :
Broadband spatially combined amplifier array using tapered slot transitions in waveguide
Author :
Alexanian, A. ; York, R.A.
Author_Institution :
Dept. of Electr. Eng., California Univ., Santa Barbara, CA, USA
fDate :
2/1/1997 12:00:00 AM
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 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)
Keywords :
MMIC power amplifiers; gallium arsenide; microwave power amplifiers; power combiners; rectangular waveguides; slot antennas; slot lines; wideband amplifiers; 2.4 W; 68 percent; 8 to 12 GHz; 9 dB; GaAs; SHF; X-band; broadband spatially combined amplifier array; broadband transitions; full waveguide band coverage; medium-power GaAs MMICs; monolithic microwave integrated circuits; quasioptical amplifier arrays; tapered slot transitions; thermal management; waveguide-based spatial combining scheme; Bandwidth; Broadband amplifiers; Gallium arsenide; MMICs; Microwave integrated circuits; Narrowband; Prototypes; Resonance; Thermal management; Waveguide transitions;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
