Received voltage and power for an arbitrary element of infinite planar arrays

For an arbitrary element of an infinite planar array, the received voltage and the power delivered to the load under plane-wave illumination are found in terms of transmitting performance parameters under the corresponding scan condition. In the process, the vector effective height is defined and a new directivity for quantifying the directive nature of radiation is introduced. Unlike previously reported expressions, the results are applicable to both unidrectional and bidirectional element patterns.