FIELD: radio engineering.
SUBSTANCE: invention can be used for setting of required amplitude-frequency characteristics and phase-frequency variations of phase-shift keyed, amplitude-shift keyed signals, and amplitude-phase-shift keyed signals in specified frequency band and frequency transformation. Modulator contains radio-frequency signal source, two-pole controlled element operated by low-frequency control signal source, four-pole network made of resistive two-pole networks, load for line amplitude and phase modulated radio-frequency signals with complex impedance with parameter values of resistive elements forming resistive four-pole network specified in such a way as to maintain required phase and transmission coefficient in the first conditions of controlled element determined by two extreme values of low-frequency control signal specified in mathematical expressions from invention formula.
EFFECT: provided line signal amplitude and phase manipulation in two conditions of controlled element within wide band.
5 cl, 6 dwg
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Authors
Dates
2008-12-10—Published
2007-02-02—Filed