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Without considering the echo signal power changes caused by target distance changes during the accumulated time the traditional radar equation is hardly applied. We take account of the effects of velocity, signal-to-noise ratio during the processing time; a modified radar equation is built which can be used for long-time integration of weak targets with high speed. After analyzing the relation between...
Antenna radiation efficiency is one of the most important antenna parameters. A number of measurement methods have been developed for characterising this parameter over the years, and Wheeler Cap method seems to be the dominant one, which is generally suitable for narrowband small antenna measurements. For wideband antennas, how to measure the antenna radiation efficiency accurately is still a challenging...
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