Compact Circularly Polarized Rectenna with Unbalanced Circular Slots

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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
Abstractâ€"A novel rectifying aerial (rectenna) using a compact circularly polarized (CP) man antenna 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 second likeable rejection. To contribute a rectenna for RF power conversion, the subscribe side of the CP antenna is the doubler recti?er circuit with tertiary order large-hearted rejection radial stub for ef?ciency optimization and harmonic power re-radiation elimination. The adopted CP antenna built on emit cost FR-4 substrate has measured bandwidth of 137 MHz (10 dB counter loss) as well as 30 MHz CP bandwidth (3 dB axial ratio). By up to 3rd order harmonic 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 gracious exposure limit respectively.




Index Termsâ€"Circular polarization, patch antenna, recti?ers, rectifying antenna (rectenna), wireless power transmission (WPT).

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INTRODUCTION

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ECTIFYING antenna (rectenna) which butt end convert RF zero to DC power plays an grievous role in free space wireless power transmission (WPT). Over the last century, the development of rectenna for space solar power transmission (SSPT) [1] as well as WPT [2] had groovy achievement with speci?c functions; and the applications e.g., actuator [3] or wireless sensors [4] were also employ with WPT techniques. It shows that the WPT techniques using rectennas have great potential to deliver energy to load through free 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 full essay, order it on our website: Ordercustompaper.com



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