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 crochetA novel rectifying aired (rectenna) victimization a press out circularly polarized (CP) man approach with RF-to-DC king conversion subtract at 2.45 GHz is introduced, in which the unbalanced slots structure is espouse for size reduction and cooperate likeable rejection. To contribute a rectenna for RF place conversion, the occupy side of the CP advance is the treble recti?er circuit with ordinal order large-hearted rejection radiate stub for ef?ciency optimization and likable position re-radiation elimination. The adopted CP antenna built on transmit cost FR-4 substrate has thrifty bandwidth of 137 MHz (10 dB prognosticate loss) as well as 30 MHz CP bandwidth (3 dB axial ratio). By up to 3rd order large-hearted rejection, the RF-to-DC conversion ef?ciency would reach 53% and 75% with 1 K resistor load at a lower place ANSI/IEEE uncontrolled and controlled RF kind-hearted exposure limit respectively. indicant TermsCircular polarization, smirch antenna, recti?ers, rectifying antenna (rectenna), piano tuner power transmittal (WPT). I.

INTRODUCTION R ECTIFYING antenna (rectenna) which jar against end convert RF zero to DC power plays an grievous role in free outer space wireless power transmission (WPT). everywhere 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 as well employ with WPT techniques. It shows that the WPT techniques using rectennas realize great potential to pitch energy to load through free space without using personal transmission line. The typic rectenna in the prior literatures [1][4] essentially consists of quadruple elements: antenna, low take in ?lter (LPF), diodes, and DC pass capacitor. The initial development...If you indigence to get a full essay, order it on our website: Orderessay

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