Transistor microstrip oscillator and diode attenuator modulator

Details Transistor microstrip oscillator and diode attenuator modulator Transistor microstrip oscillator and diode attenuator modulator

1978-03-13

1979-02-20

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

325125, 325182, 331 99, 331117D, 332 52, 332 53, H03B 518, H03C 114

Patent

active

041409825

ABSTRACT:
An RF oscillator and modulator especially useful for UHF applications. The oscillator may comprise a series-tuned Colpitts circuit with the tuned circuit including microstrip transmission lines as impedance elements. The modulator includes a pair of serially connected diodes with the common terminal of the diodes receiving a modulation signal which varies the total current through the diodes. The diodes function as current-variable resistances to attenuate the carrier frequency signal in response to the modulation signal.

REFERENCES:
patent: 3189836 (1965-06-01), Podell
patent: 4047127 (1977-09-01), Alexander
Draper, "Recent Developments in Solid State Sources for Microwave Instrumentation", Electronic Engineering, January 1974, pp. 54-58.
Hodowanec, "Microwave Transistor Oscillators", The Microwave Journal, June 1974, pp. 39-42, 62.

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