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A Dual-Port Triple-Band L-Probe Microstrip Patch Rectenna for Ambient RF Energy Harvesting

2017; IEEE Antennas & Propagation Society; Volume: 16; Linguagem: Inglês

10.1109/lawp.2017.2761397

1548-5757

Shanpu Shen, Chi-Yuk Chiu, Ross Murch,

Antenna Design and Analysis

A dual-port triple-band L-probe microstrip patch rectenna design for ambient RF energy harvesting using the GSM900, GSM-1800, and UMTS-2100 bands is described. The compact dual-port L-probe patch antenna is implemented by stacking two single-port patch antennas back to back. Each port can independently harvest RF signal from a half-space with gain greater than 7 dBi, and together with both ports in a dc combining configuration, the antenna can acquire RF energy from nearly all directions. We also provide a design for a high-efficiency triple-band rectifier operating at GSM-900, GSM-1800, and UMTS-2100, which is replicated on each port and concatenated together to allow dc combining and near doubling of the output dc voltage. Measurement results show that our prototyped dual-port triple-band rectenna can receive RF power from nearly all directions with an efficiency of greater than 40% and an output voltage of more than 600 mV when the power density is greater than 500 μW/m 2 .