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Title: SAR processing with stepped chirps and phased array antennas.

Wideband radar signals are problematic for phased array antennas. Wideband radar signals can be generated from series or groups of narrow-band signals centered at different frequencies. An equivalent wideband LFM chirp can be assembled from lesser-bandwidth chirp segments in the data processing. The chirp segments can be transmitted as separate narrow-band pulses, each with their own steering phase operation. This overcomes the problematic dilemma of steering wideband chirps with phase shifters alone, that is, without true time-delay elements.
Authors:
Publication Date:
OSTI Identifier:
893561
Report Number(s):
SAND2006-5855
TRN: US200625%%345
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Research Org:
Sandia National Laboratories
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; ANTENNAS; DATA PROCESSING; OPTICAL RADAR; TIME DELAY; Phased array antennas.; Signals and signaling.; Synthetic Aperture Radar.