Phased array antenna including a distributed phase...

Details Phased array antenna including a distributed phase... Phased array antenna including a distributed phase...

2005-12-13

2005-12-13

Issing, Gregory C. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

C342S368000

Reexamination Certificate

active

06975268

ABSTRACT:
A phased array antenna includes a transmission line network, e.g. optical or coaxial cable network, and a reference signal generator to provide a reference frequency signal to each of the antenna radiating elements. A phase calibrator generates a calibration signal. e.g. a swept frequency signal, on the transmission line network which is also reflected to create a reflected calibration signal. The phase calibrator determines a frequency difference between the calibration signal and the reflected calibration signal at each of a plurality of taps, and outputs a delay measurement signal to the antenna radiating elements, e.g. via an antenna controller, for adjusting a phase of the reference frequency signal.

REFERENCES:
patent: 5943010 (1999-08-01), Rudish et al.
patent: 6861975 (2005-03-01), Coleman, Jr. et al.
patent: 2004/0243326 (2004-12-01), Daoud et al.
Brauner, T. et al, “A Versatile Calibration Method for Small Active Antenna Arrays,” 33rd European Microwave Conf, Munich 2003, pp. 797-800.

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