Abstract :
Voltage tuning of Gunn oscillations in the frequency range 1.5¿8.5 GHz has been achieved by using planar Gunn diodes with concentric contacts. Frequency against voltage curves are presented for three diodes with somewhat different contact geometries, each of them having a tuning range of more than one octave. This simple method of tuning over large frequency ranges is of great potential interest. The production process using evaporation and etching is described.
