A 2.4-GHz Dual Polarized Suspended Square Plate Rectenna with Inserted Annular Rectangular Ring Slot

摘要

This research has proposed a dual polarized suspended square plate rectennarnfor RF-to-DC conversion at the 2.40–2.50 GHz frequency band. The proposed dual polarizedrnantenna yields improved isolation with an annular rectangular ring slot etched in thernsquare radiating plate. The proposed antenna could achieve >40.00 dB isolation and >8.00rndBi gain with unidirectional radiation. The proposed SMS7630-based rectifying circuitsrnwere measured and could realize the maximum conversion efficiency of 25.98% (1.57 V)rnwith a 3.00 kΩ resistor and 2.00 mW input RF power of a signal generator. On integration,rnthe experimental vertical polarization rectenna was capable of achieving the maximum conversionrnefficiency of 21.86% (14.20 mV) at the 0.5 m distance and 0.00015.00 mW/cm~2 inputrnpower density. The proposed dual polarized rectenna can receive the input RF power densityrnof arbitrary polarization with obtained average conversion efficiency of 14.97% (10.50rnmV) at the 0.5 m distance of wireless local area network (WLAN) system.