Compact Circularly Polarized Rectenna with Unbalanced Circular Slots

882 IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 56, NO. 3, MARCH 2008 Compact circularly Polarized Rectenna With Unbalanced Circular Slots Tzong-Chee Yo, Chien-Ming Lee, Chen-Ming Hsu, and Ching-Hsing Luo, Member, IEEE AbstractA novel rectifying forward pass (rectenna) using a compact circularly polarized (CP) man aerial with RF-to-DC king conversion part at 2.45 GHz is introduced, in which the unbalanced slots structure is adopted for size reduction and secondment likeable rejection. To contribute a rectenna for RF power conversion, the bid side of the CP antenna is the doubler recti?er circuit with third order large-hearted rejection radial stub for ef?ciency optimization and harmonized power re-radiation elimination. The adopted CP antenna built on give away cost FR-4 substrate has measured bandwidth of 137 MHz (10 dB predict loss) as well as 30 MHz CP bandwidth (3 dB axial ratio). By up to 3rd order charitable rejection, the RF-to-DC conversion ef ?ciency would reach 53% and 75% with 1 K resistor load under ANSI/IEEE uncontrolled and controlled RF clement exposure limit respectively. Index TermsCircular polarization, small-arm antenna, recti?ers, rectifying antenna (rectenna), wireless power transmission (WPT). I.

INTRODUCTION R ECTIFYING antenna (rectenna) which butt end convert RF adjust to DC power plays an grievous role in sinless space wireless power transmission (WPT). Over the stretch out century, the development of rectenna for space solar power transmission (SSPT) [1] as well as WPT [2] had groovy achievement with speci?c f unctions; and the applications e.g., actuato! r [3] or wireless sensors [4] were also employ with WPT techniques. It shows that the WPT techniques using rectennas have prominent potential to deliver energy to load through foreswear space without using personal transmission line. The typical rectenna in the prior literatures [1][4] basically consists of quadruple elements: antenna, low pass ?lter (LPF), diodes, and DC pass capacitor. The initial development...If you indigence to get a panoptic essay, order it on our website: OrderCustomPaper.com

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