| 摘要 |
A method in circuit for controlling the temperature of IMPATT diodes during pulsed operations: first, by providing a switch of the RF energy produced by the IMPATT for switching the IMPATT output from an antenna to an internal load, the switch being a pin diode switch; secondly, switching the output of a pair of IMPATT diodes from an antenna to an internal load by providing a selective phase shifter for shifting the phase of the injection signal to one of the IMPATT diodes and further providing a hybrid coupler at the output ends of the IMPATT diodes and disposed between the antenna and the internal load; thirdly, providing a pair of injection signal sources which operate on different frequencies and alternately switching the separate injection sources with the input end of an RF producing IMPATT diode; and fourthly, providing a positive biased pre-heat current pulse to the RF producing IMPATT.
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