Two Gunn-effect diodes, connected in a series circuit nearly as small as the eye of a needle, can produce higher levels of microwave power than any previously known solid-state device.The series operation of directly-connected Gunn-effect diodes, an electronic feat once believed to be impossible, was recently demonstrated for the first time by scientists at the General Electric Research and Development Center.Measuring 40 thousandths by 65 thousandths of an inch, the tiny circuit is composed of two gallium arsenide chips - the Gunn diodes - mounted between metal wafers which provide electrical contact points and act as heat sinks.
Photo measures 10 x 8 inches.
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