Moving receive beam method and apparatus for synthetic aperture radar
Abstract
A method and apparatus for improving the performance of Synthetic Aperture Radar (SAR) systems by reducing the effect of "edge losses" associated with nonuniform receiver antenna gain. By moving the receiver antenna pattern in synchrony with the apparent motion of the transmitted pulse along the ground, the maximum available receiver antenna gain can be used at all times. Also, the receiver antenna gain for range-ambiguous return signals may be reduced, in some cases, by a large factor. The beam motion can be implemented by real-time adjustment of phase shifters in an electronically-steered phased-array antenna or by electronic switching of feed horns in a reflector antenna system.
- Inventors:
-
- San Ramon, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 873501
- Patent Number(s):
- 6175326
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01Q - ANTENNAS, i.e. RADIO AERIALS
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- moving; receive; beam; method; apparatus; synthetic; aperture; radar; improving; performance; systems; reducing; effect; edge; losses; associated; nonuniform; receiver; antenna; pattern; synchrony; apparent; motion; transmitted; pulse; ground; maximum; available; times; range-ambiguous; return; signals; reduced; factor; implemented; real-time; adjustment; phase; shifters; electronically-steered; phased-array; electronic; switching; feed; horns; reflector; return signal; aperture radar; phase shift; phase shifter; synthetic aperture; transmitted pulse; phased-array antenna; phase shifters; receiver antenna; electronic switch; beam method; /342/
Citation Formats
Kare, Jordin T. Moving receive beam method and apparatus for synthetic aperture radar. United States: N. p., 2001.
Web.
Kare, Jordin T. Moving receive beam method and apparatus for synthetic aperture radar. United States.
Kare, Jordin T. Mon .
"Moving receive beam method and apparatus for synthetic aperture radar". United States. https://www.osti.gov/servlets/purl/873501.
@article{osti_873501,
title = {Moving receive beam method and apparatus for synthetic aperture radar},
author = {Kare, Jordin T},
abstractNote = {A method and apparatus for improving the performance of Synthetic Aperture Radar (SAR) systems by reducing the effect of "edge losses" associated with nonuniform receiver antenna gain. By moving the receiver antenna pattern in synchrony with the apparent motion of the transmitted pulse along the ground, the maximum available receiver antenna gain can be used at all times. Also, the receiver antenna gain for range-ambiguous return signals may be reduced, in some cases, by a large factor. The beam motion can be implemented by real-time adjustment of phase shifters in an electronically-steered phased-array antenna or by electronic switching of feed horns in a reflector antenna system.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2001},
month = {Mon Jan 01 00:00:00 EST 2001}
}
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