Prototype Model of an Optically Controlled Array Antenna
Active phased array (PA) antennas are being proposed for the next generation of remote sensing synthetic aperture radars (AS AR) because of their electronic beam steering and shaping capabilities, graceful degradation, and out-of-theatre interference rejection capability. However, those antennas are difficult to build with conventional microwave components. Optical technology could play a significant role in providing solutions to the problems encountered with an all-microwave implementation. For example, fibre optics could replace the conventional waveguides or coaxial cables for signal distribution. This would not only reduce considerably the weight and size of the system, but would also allow lower losses in the signal distribution, provide better interference immunity, and give higher bandwidth.
KeywordsSynthetic Aperture Radar Central Processor Antenna Element Amplitude Control Link Budget
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