Abstract: An optimization model of the rectenna is proposed based on analysis of the factors influencing conversion efficiency of the rectifying diode using circuit simulation software, and investigation of the receiving antenna and LPF using full-wave electromagnetic field simulation software. A 10GHz-rectenna was designed and manufactured. Experiments were carried out in an anechoic chamber. Measured data agree well with the simulation results. The measured output voltage reaches 2.45 V and the RF-DC conversion efficiency is about 58%. Factors affecting the efficiency of rectenna are summarized and methods for improving rectifying efficiency suggested.

Key words: circular polarization, low pass filter (LPF)
, wireless power transmission, rectenna