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Bi-state varactor phase modulation network and process for constructing same

  • US 3,914,708 A
  • Filed: 01/14/1974
  • Issued: 10/21/1975
  • Est. Priority Date: 11/09/1972
  • Status: Expired due to Term
First Claim
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1. A low distortion high frequency phase modulation network for introducing a phase change into microwave or millimeter wave signals and having a bistate frequency switching capability at least in excess of approximately 100 gigahertz comprising:

  • a. conductive means including input and output ports for receiving said signals and for propagating reflected signals, b. a terminating impedance or short connected across said input and output ports, c. a bistate varactor diode connected in parallel with said terminating impedance or short and spaced therefrom an adjustable phase difference theta , and d. means for biasing said varactor diode at one or another of its two relatively stable capacitance states, whereby said varactor diode will either approximate a series resonant condition or an antiresonant condition and thereby cause a predetermined phase delay in signals reflected on said conductive means in accordance with the resonant state of said varactor diode, whereby said varactor diode may be rapidly switched between said capacitance states at frequencies up to and including 100 gigahertz or higher.

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