Amplitude modulated impatt diode oscillator and a low cost commu

Details Amplitude modulated impatt diode oscillator and a low cost commu Amplitude modulated impatt diode oscillator and a low cost commu

1975-09-25

1978-10-03

Safourek, Benedict V.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

325105, 325365, 329205R, H03D 110, H04B 122

Patent

active

041185986

ABSTRACT:
A low cost microwave communication system is described in which a transmitter including an IMPATT diode operating CW (Continuous Wave) is amplitude modulated by a video signal such that the radiated RF (radio frequency) output from the transmitter is directly proportional to the amplitude of the video signal. Low level radiated power from the transmitter is picked up by a receiver which includes a "square law" detector. The detector provides an output voltage according to the power level of the received RF signal.

REFERENCES:
patent: 3430249 (1969-02-01), Franks
patent: 3659204 (1972-04-01), Hufford
patent: 3673515 (1972-06-01), Kersten et al.
patent: 3882419 (1975-05-01), Swartz
Kramer, "Impatt Diodes and Millimeter-Wave Applications Grow Up Together", Electronics, Oct. 11, 1971, pp. 78-81.
"Nonlinear Behavior and Bias Modulation of an Impatt Diode Oscillator", Chao and Haddad, IEEE Transaction on Microwave Theory and Techniques, vol. MTT-21, No. 10, Oct. 73.

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