Abstract :
A single multichip IMPATT diode, operating in the unconditional amplifying mode, has been used as a reflection amplifier in the 6¿8 GHz range. C.W. power-output levels of 4.0 W have been achieved with a stable reflection-amplifier circuit, using two multichip diodes in separate cavities coupled to a single circulator through an airstrip hybrid. The gain of the amplifier is 6 dB, with 250 MHz (¿1 dB) bandwidth.
