A series-parallel rectifier with an inductance loaded for wireless power transfer

2.45-GHz wideband harmonic rejection rectenna for wireless power transfer zhanyu kang, xianqi lin, cong tang, peng mei, wangmao liu and yong fanIn this paper, a 2.45-GHz wideband harmonic rejection rectenna for wireless power transfer is proposed. The rectenna comprises a microstrip-fed circular ring slot antenna (CRSA) and a series-parallel rectifier (SPR). A compact micro strip resonant cell is inserted into the CRSA so that the harmonic suppression over a wide bandwidth (3-8 GHz) can be obtained. The radiofrequency (RF)-DC conversion efficiency of the SPR is improved effectively by loading a proper compensating inductance, especially under the low input power levels. Furthermore, the proposed rectenna can easily achieve large-scale rectenna arrays using its simple structure. The adopted rectenna fabricated on a low cost Taconic RF-35 substrate has been measured. By up to 3rd-order harmonic rejection, the efficiency of the rectenna can achieve 70.2% with the optimum load resistance 1 kV. Good agreement among the calculated, simulated, and measured rectenna is observed.

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“…We have already reported a series-parallel rectifier with an inductance [13], which can develop the RF-DC efficiency notably as shown in Fig. 7.…”

Section: I R E C T E N N a D E S I G Nmentioning

confidence: 99%