Experimental Development of 2.45GHz Rectenna using FSS and Dual-Polarization

This paper reports on experimental development of 2.45GHz rectenna(Rectifying Antenna) using FSS(frequency Selective Surface) and dual-polarization method Applied dual-polarization method for compensated the variation of conversion efficiency with rectenna position change, conversion efficiency of rectenna has a 69.1% with 360Ω(dipole type) and 75.4% with 340Ω (patch type) optimum load resistor. When the each of dual-polarization rectenna has a optimal load resistor, its conversion efficiency shows of ±20% in dipole type and ±5% in patch type at 0 ~ 180° position. We used double square loop FSS to suppress the 2nd harmonic of 4.9GHz and 5th harmonic of 12.25GHz frequency band. When applied FSS structure for rectenna, insertion loss was under 1dB as the passband and over 20dB as the stopband. The microwave-DC conversion efficiency was represented good properties of ±2% variation.