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Fast frequency-switching system for frequency-shift-keying pulse-code modulation

Fast frequency-switching system for frequency-shift-keying pulse-code modulation

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© The Institution of Electrical Engineers
Published

An f.s.k. pulse modulator has been developed which uses two cavity modes for the two frequency states of a Gunn oscillator. 300 megapulse operation with about 10 mW microwave output at 13.25 and 20.7 GHz for baseband pulses of about 3 V into 50 Ω was obtained.

Inspec keywords: modulators; Gunn oscillators; switching systems; pulse-code modulation

Other keywords: 10 mW microwave output; Gunn oscillator; FSK; pulse modulator; PCM; 13.25 and 20.7 GHz

Subjects: Modulators, demodulators, discriminators and mixers; Modulation and coding methods; Solid-state microwave circuits and devices

References

    1. 1)
      • N. Pollmann , R. Engelmann , W. Frey , B.G. Bosch . Load dependence of Gunn-oscillator performance. IEEE Trans.
    2. 2)
      • A.B. Carlson . (1975) , Communication systems.
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