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ABSTRACT
In this paper a grid separation cavity for CW oscillator operating in L-band (1000–2000 Mc/s.) using pencil tube developed to be used as a Local Oscillator in S-band Pulsed Radar Transponder, developed by the author is presented. The power output and frequency have been measured as a function of the input power. At fixed input power, the variation of frequency as a function of the number of turns of tuning slug has also been measured. Lastly, the variation of frequency with temperature (from +20° to +90°C.) has been measured and a temperature compensation circuit designed to keep the shift in frequency less than 2 Mc/s. These measurements have been made on two cavities operating on 1375 and 1535 Mc/s.