| 摘要 |
In an R.F. oscillator arrangement comprising a modulator (M) and a diode (D), such as a TRAPATT diode, operable to produce pulses of R.F. energy when d.c. pulses above a critical level are applied to the diode (D), the frequency of oscillation is markedly dependent on thetemperature of the diode (D). To reduce variations of the frequency over a wide operating range of ambient temperatures a direct current below the critical level is passed through the diode (D) to heat it. The heating current being controlled by measuring the temperature with device (G), of a heat-sink (N) on which the diode (D) is mounted and which is substantially at ambient temperature, or by measuring the oscillating frequency by means of device (K). |
