Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna pattern plotting
Reexamination Certificate
2006-06-21
2008-11-11
Phan, Dao L (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna pattern plotting
C342S173000, C342S372000
Reexamination Certificate
active
07450065
ABSTRACT:
A radar system operates at various different frequencies, and routes power among various antennas by use of a hybrid arrangement. The system is precalibrated at each possible operating frequency by adjusting the phase shifts associated with the hybrid in a feedback manner to provide optimal performance, and the calibration values are stored. During normal operation, the calibration values of phase shift are selected and used for feedforward operation at each frequency.
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Bruce Gregory S.
Lew Wilbur
Riley Timothy R.
Duane Morris LLP
Lockheed Martin Corporation
Phan Dao L
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