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US 4,365,173 AGranted
Phase shifter adjustment apparatus
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorRichard G. Kilcup
Life of this patent
Estimating the term…
Abstract
A phase shifter adjustment apparatus utilizing a current source bleed unit to control microwave ferrite phase shifter coils without elongating the switching time. The current sources provide a high impedance to the phase shifter coils thereby minimizing RL time constants.
Claims12
In a microwave ferrite phase shifter unit, a phase shifter adjustment apparatus comprising in combination:
- a ferrite phase shifter means comprising first and second ferrite cores and first and second control coils, said first and second control coils respectively controlling the magnetic field intensity B within said first and second ferrite cores thereby controlling the phase shift therein, said first and second control coils varying the magnetic field intensity B according to the amount of current flowing in said first and second control coils, and
- a current source means operatively connected to said ferrite phase shifter means, said current source means controlling the polarity and amount of current flowing in said first and second control coils according to the polarity of the drive waveform which is applied to said ferrite phase shifter means.
Dependencies are inferred from the claim text.