1 MHz band rectenna with several rectifier devices in nW operation

Abstract

In this paper, simulational and experimental investigations on the 1 MHz band rectenna in nW operation are described for energy harvesting from AM radio waves. For the objective, a commercial based SBD, a Cross couple CMOS Pair (CCP) IC and a super-steep subthreshold slope PN-body tied SOI-MOSFET (PNBT) diode are investigated as rectifier devices in nW region. In experiments with the CCP IC, efficiency of 9.4 % at -41 dBm can be obtained. In simulation with the PNBT diode, efficiency of 30.3 % at -40 dBm can be estimated for our future step. These results clarify superior possibility for energy harvesting in wider service area with AM radio waves.