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资源说明：Abstract There is an increasing demand for a low cost, day-night, all weather
spaceborne imaging capability using synthetic aperture radar (SAR) on small satellites.
Traditional pulsed SAR payloads have been too expensive and too power
demanding to be employed on low-cost microsatellite platforms. Recent developments
based on Continuous Wave (CW) techniques have proved successful in
minimizing the cost, mass and power of SARs for small airborne platforms (UAVs).
However, when considering the use of CW techniques for space based SARs, other
considerations come into place: A major one being need of high isolation between
transmit and receive antennas, in short, a bi-static configuration. Conventional
receiver designs based on analogue demodulation techniques remain inflexible and
are complicated to change to suit changing operational requirements in a dynamic
bi-static satellite formation. This chapter focuses on the research being carried out
in the Surrey Space Centre (SSC) on the design and development of a software
defined linear frequency modulated (LFM) CW SAR receiver that can be used on
bi-/multi-static microsatellites for remote sensing.
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