Reception Efficiencies It is important to demonstrate that the predicted reception efficiencies can be met. and if practical, over a range of distances. All the power received does not necessarily need to be reconverted into electricity. Instead, rectenna ‘patches” can be placed at strategic locations on the rectenna in order to characterise the beam shape and dynamics. This is also important in quantifying non-linear plasma interactions for microwave beams, and in developing “real-time” beam control algorithms to compensate for mis-pointing. Safety The demonstrator should have the capability to acquire the rectenna directly with sensors or the power beam set on very low levels. Once the rectenna is located, feed-back mechanisms should be established to immediately switch off the power beam in the event that mis-pointing occurs. Fail-safe designs must be demonstrated to ensure that the power beam will never stray beyond the rectenna (within the pointing limits defined above.) The ability to cope with rapid beam mis-pointing, such as from an orbital debris impact, should be simulated if possible. 4.5.2 Advanced Demonstrator Defining the specific requirements for the advanced demonstrator is more difficult, and will depend on the success of the initial demonstrator. However, this second experiment should provide much higher levels of microwave or laser power, and more importantly perhaps, demonstrate some of the operational characteristics of the Microwave and Laser Solutions defined in
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