【摘 要】
：
A novel low profile multiband rectenna was proposed for harvesting the 2nd generation(2G),the 3rd generation (3G),the 4th generation (4G),wireless local area networks (WLANs) etc.,electromagnetic wave energy.The proposed rectenna consists of a novel multi
【机 构】
：
Nanjing Vocational College of Information Technology, Nanjing 210023, China;Nanjing University, Nanj
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A novel low profile multiband rectenna was proposed for harvesting the 2nd generation(2G),the 3rd generation (3G),the 4th generation (4G),wireless local area networks (WLANs) etc.,electromagnetic wave energy.The proposed rectenna consists of a novel multiband antenna and a rectifier.The multiband antenna includes a radiating element on one side of a single layer dielectric substrate and a feeding spiral balun on the other side of the substrate.A conductive via is connected between the balun and the radiating element.In the radiating element,a deformed dipole structure is connected with an equiangular spiral slot structure and is used to generate a low frequency radiation around 900 MHz.The multiband antenna can work simultaneously at 0.869 GHz ～ 0.948 GHz,1.432 GHz～2.173 GHz,and 2.273 GHz ～ 2.465 GHz with its peak gains of 7.1 dBi at 903 MHz,4.1 dBi at 1 800 MHz,5.2 dBi at 2 430 MHz.The radio frequency to direct current (RF-to-DC) conversion efficiencies of the rectifier are 58％ ～62％ at these three frequencies for an input power of 0 dBm.The overall measurement results validate that the rectenna suits for energy harvesting and exhibits approximate maximum efficiencies of 58％ at 0.9 GHz,56％ at 1.8 GHz,and 55％ at 2.4 GHz with a low incident power density of 8 μW/cm2.
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