Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1978-12-18
1981-06-30
Grimm, Siegfried H.
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
332 29R, 333104, 333128, 333164, H03C 300, H01P 308
Patent
active
042765218
ABSTRACT:
A quadriphase modulator, designed in a planar metal geometry for operation in the microwave frequency range, uses Schottky barrier diodes as the switching elements, and is capable of operating at bit data rates up to 15% of the carrier frequency. The microwave circuit employs a microstrip power splitter that couples the carrier signal to two biphase modulators while providing DC isolation. Each biphase modulator includes coplanar-to-slot transmission line transition, with a pair of diodes controlling the phase shift across the transition. The diodes are connected in reverse polarity and the bias for switching the diodes is controlled by the modulating signal. The slot lines from the two biphase modulators are coupled through a microstrip transition and through a Lange 90 degree hybrid to the output load.
REFERENCES:
patent: 3678395 (1972-07-01), Hunton et al.
patent: 3967217 (1976-06-01), Solomon
patent: 4118670 (1978-10-01), Dickens
patent: 4168479 (1979-09-01), Rubin
Sarbacher, "Encyclopedic Dictionary of Electronics and Nuclear Engineering," Prentice-Hall, Inc., 1959; pp. 782-783.
Connors John J.
Finkel Andra M.
Grimm Siegfried H.
TRW Inc.
Westin Edward P.
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