In order to absorb and rectify as efficiently as possible the radio frequency energy distributed in the surrounding environment,this paper proposes a dual-band RF energy harvesting system operating in GSM1800 and UMTS2100 frequency bands. The receiving antenna of this system adopts a planar broadband yagi antenna,which has compact structure,high measured average gain and stable directional radiation pattern in the working frequency bands. In the low input power circumstance from-20 d Bm to-5 d Bm,the rectif...
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