Communications: directive radio wave systems and devices (e.g. – With particular circuit – For pulse modulation
Patent
1989-09-13
1990-08-28
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
For pulse modulation
342 26, H04B 666
Patent
active
049529412
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: 4097823 (1978-06-01), Jerinic et al.
patent: 4151488 (1979-04-01), Wallace
patent: 4306237 (1981-12-01), Tresselt
patent: 4445096 (1984-04-01), Lee
patent: 4568891 (1986-02-01), Davies
patent: 4884077 (1989-11-01), Landt
Sze, Semiconductor Devices, Physics and Technology.
Hamann H. Fredrick
Hellner Mark
Murrah M. Lee
Rockwell International Corporation
Tarcza Thomas H.
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