DC power pattern analysis of N-by-N staggered pattern charge collector and N2 rectenna array

This paper compares a 4-by-4 dipole staggered pattern charge collector (SPCC) rectenna array to a 16 dipole rectenna array arranged in a four series-four parallel configuration. While each of these energy harvesting circuits has an identical footprint, the SPCC has a DC power pattern which simultaneously provides high gain and wide beamwidth. This profile provides RF energy harvesting sensors with additional range and makes them less sensitivity to orientation. At 0.1 m range, the N² rectenna has a peak DC voltage 20% larger than the SPCC, but the SPCC´s beamwidth is 400% larger than the N² rectenna array. At 1 m range, the SPCC beamwidth is 600% larger, and the peak voltage is 300% larger than the N² rectenna control case.