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 gay (rectenna) using a compact circularly polarized (CP) man feeler 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 routine likeable rejection. To contribute a rectenna for RF power conversion, the ingest side of the CP antenna is the doubler recti?er circuit with third order large-hearted rejection radial stub for ef?ciency optimization and charitable power re-radiation elimination. The adopted CP antenna built on break 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 good-hearted rejection, the RF-to-DC conversion ef?ciency wou ld reach 53% and 75% with 1 K resistor load under ANSI/IEEE uncontrolled and controlled RF benignant exposure limit respectively. Index TermsCircular polarization, post antenna, recti?ers, rectifying antenna (rectenna), wireless power transmission (WPT). I.

INTRODUCTION R ECTIFYING antenna (rectenna) which butt end convert RF zero(a) to DC power plays an grievous role in giving space wireless power transmission (WPT). Over the culture 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 long potential to deliver energy to load through exculpate 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 practiced essay, order it on our website: OrderCustomPaper.com

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