Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1995-05-31
1997-10-21
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342157, 342174, H01Q 322, H01Q 324, H01Q 326
Patent
active
056801416
ABSTRACT:
Telecommunication systems and methods for driving a phased-array antenna ing a plurality of spaced antenna elements that radiate and receive a beam of radio frequency signals. Each of a plurality of ferroelectric phase shifters connect to a different one of the antenna elements. A signal processor system, having a receiver and a frequency synthesizer communicates with the phase shifters under the control of a data processor system. A joystick connects to the data processor system for permitting manual input of beam steering information thereto. The data processor system responds to the joystick inputs by controlling the relative phase shifts of the signals propagating in the ferroelectric phase shifters. The system further includes a temperature sensor circuit for sensing the temperature of each of the ferroelectric phase shifters. This temperature sensor circuit connects to the data processor system for inputting temperature information that the data processor system uses to calculate calibration error factors. The data processor system uses the joystick inputs and the calibration error factors to apply concurrent calibrated analog control voltages to the ferroelectric phase shifters for controlling their relative phase shifts. The joystick permits an operator to manually control the position of the beam in real time, or to effect automatic beam scanning and control the scanning rate.
REFERENCES:
patent: H173 (1986-12-01), Claborn et al.
patent: 5107273 (1992-04-01), Roberts
patent: 5218358 (1993-06-01), Harrington et al.
patent: 5353031 (1994-10-01), Rathi
Didomenico Dale M.
Drach William C.
Koscica Thomas E.
Anderson William H.
Blum Theodore M.
The United States of America as represented by the Secretary of
Zelenka Michael
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