Weather radar temperature controlled impatt diodes circuit and m

Details Weather radar temperature controlled impatt diodes circuit and m Weather radar temperature controlled impatt diodes circuit and m

1988-01-27

1989-11-28

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

For pulse modulation

342175, H04B 666

Patent

active

048840777

ABSTRACT:
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.

REFERENCES:
patent: 3831109 (1974-08-01), Leiby
patent: 4028637 (1977-06-01), Gewartowski et al.
patent: 4086543 (1978-04-01), Nigrin
patent: 4151488 (1979-04-01), Wallace
patent: 4306237 (1981-12-01), Tresselt
patent: 4333062 (1982-06-01), Uwano
patent: 4445096 (1984-04-01), Lee et al.
patent: 4492960 (1985-01-01), Hislop
patent: 4504718 (1985-03-01), Okatsuka et al.
patent: 4568891 (1986-02-01), Davies

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