frequency modulator having two varactor diode oscillators, one weakly coupled, the other strongly coupled, to the mixing stagedoi:US3307119 AHerbert, HolzwarthHans, LeysiefferEgmont, GablerUS
Varactordiodemodulator
Get PDF (358K) Keywords: BPSK modulator; p-i-n diode modulator; microwave integrated circuits Abstract A suppressed carrier modulator with compensation to individual constellation points, based on a reflective switching 180° hybrid coupler configuration, is described. The design minimizes modulated sign...
Polaniecki, in U.S. Pat. No. 3,316,478, shows a regenerative frequency changer with a diode mixer having an input connected to the frequency changer output through a frequency multiplier comprising a DC blocking capacitor and a varactor diode. The varactor in this circuit is used for frequen...
W. R. Day, “Frequency modulation of cavity stabilized solid state diode oscillators,” Microwave Symposium Digest, G-MTT International 73 (1), 247–249 (1973). CrossRef I. Haga et al., “A Reflection Type Cavity Controlled Oscillator and a Cavity Controlled Frequency Modulator,” NEC Resea...
Use of such a varactor diode in a binary 0-# phase-shift PCM microwave application is shown in Fig. 5a, in which the diode 30 is located in the passage 66 of a waveguide structure 64 comprising also a movable tuning short 68. The diode is secured to an Ag pin 72 separated by a ...
FREQUENCY MODULATOR COMPRISING A DIODE VARACTORCESARE ANICHINI