Hello I'm thinking about build a in a rectenna for rf energy harvesting and was wondering how to caculate the amount of voltage and ampage my tank circuit will receive or produce from a electromagnetic wave so that I can figure out the capacatance value of the smoothing cApsitor I will need for it. Is there anyway to know how much voltage and ampage a electromagnetic wave will produce and whether a low frequency or high frequicy wave is best for as much power I can get from a rectenna. Thanks .