Modulators – Phase shift keying modulator or quadrature amplitude modulator
Patent
1998-01-28
1999-02-02
Grimm, Siegfried H.
Modulators
Phase shift keying modulator or quadrature amplitude modulator
332105, 333 26, 375282, 455327, H04L 2720
Patent
active
058670726
ABSTRACT:
A double-balanced microwave biphase modulator circuit is provided with a first balun for transforming the unbalanced RF Input impedance to a balanced diode impedance and providing direct current ground return paths, and a second balun for transforming the balanced diode impedance to the unbalanced RF Output impedance and providing access for data input. The first balun consists of a transmission line attached from a coupled pair of transmission lines to ground. The second balun consists of three pairs of coupled transmission lines, in which the first two pairs of transmission lines are attached to a diode ring, to a data input filter, to a circuit ground, and to the third pair of transmission lines.
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Grimm Siegfried H.
Merrimac Industries, Inc.
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