Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By monitoring
Reexamination Certificate
2005-03-01
2005-03-01
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
By monitoring
C342S02500R, C342S02500R, C342S118000, C342S128000, C342S165000, C342S173000, C342S195000, C342S196000, C342S352000, C342S368000, C342S371000, C342S375000, C342S131000, C342S132000
Reexamination Certificate
active
06861975
ABSTRACT:
A chirp-based arrangement derives a measure of phase variation through a reference frequency transport cable of a phased array antenna architecture, such as a spaceborne synthetic aperture radar system. A direct digital synthesized chirp signal is injected in an upstream direction into the transport cable from a downstream end thereof, so that the chirp signal is transmitted in an upstream direction, reflected from an upstream bandpass filter, and returned in a downstream direction. At each of a plurality of nodes that are distributed along the transport cable, the two chirp signals are extracted and frequency domain-processed to derive said measure of transport delay through the cable between the source of the reference frequency signal and each of the nodes.
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Coleman Jr. John Roger
Mashburn Travis Sean
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Gregory Bernarr E.
Harris Corporation
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