W-band power combiners using double-drift IMPATTsilicon diodes have been developed to generate high pulsed power. The combiner design was based on a computer analysis of the cross-coupled coaxial-waveguide diode mounting structure which forms the basic module of the combiner. Peak output power of 20.5 W for a two diode combiner and 40 W for a four-diode combiner have been achieved. The diodes were operated at 100-ns pulsewidth and 0.5-percent duty cycle. The combiners demonstrated over 80-percent combining efficiency and 6-percent dc-RF conversion efficiency.
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Chang et al. (1980) studied this question.
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