A 2.45 GHz rectenna in a near-field wireless power transmission system on hundred-watt level

The measurement of a hundred-watt level 2.45 GHz near-field rectenna with a two-layered structure is presented. The large power capacity of the rectenna is realized by assigning the input microwave power with a power divider and using Schottky diodes array. A 2×4 sub-array, namely 16 rectenna elements, constructs the receiving sub-system. In a near-field wireless power transmission system, a regulated circuit is attached to protect diodes from breakdown and makes the ripple of the DC output less. The maximum DC power of the whole rectenna array archives 67.3 W at a 1.2 Ω load with a distance of 5.5 m. It shows that low power Schottky diodes can be used in large power rectifying circuits and MPT systems with simple magnetron source.