Wide-range electronic tuning of a Gunn diode by an yttrium-iron garnet (y.i.g.) ferrimagnetic resonator

A Gunn diode was mounted in a coaxial line circuit and tuned by a y.i.g. spherical single-crystal resonator. The oscillator could be tuned over the range 5.8¿10.8 GHz and, over nearly all of this range, the frequency varied linearly with magnet-coil current. Although successful tuning has been achieved, many aspects of design remain to be studied.