35 GHz rectifying antenna for wireless power transmission

A new rectifying antenna for 35 GHz wireless power transmission is presented. The rectifying antenna (rectenna) is designed on R/T Duroid 5880 substrate with epsiv_r = 2.2 and thickness of 1.3 mm. The rectenna arrays are built by series-connecting single elements for higher DC output. The single element, the 1times2 array, and the 2times2 array achieve RF-to-DC conversion efficiencies of 35% when the power density is 30 mW/cm², corresponding to DC voltages of 0.45, 0.93 and 1.73 Y respectively. The linearity of the rectenna is good, hence it can be used as the building block to assemble a large rectifying antenna array with predictable output performance.