A Novel Compact and Frequency-Tunable Rectenna for ... - IEEE Xplore

5 downloads 0 Views 458KB Size Report
Department of Electrical Engineering and Electronic,. University of Liverpool,. Liverpool, United Kingdom sgcsong2@liv.ac.uN; yi.huang@liv.ac.uN;. Paul Carter.
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Ÿ ,Q RUGHU WR DFKLHYH D WXQDEOH RSHUDWLQJ IUHTXHQF\ EDQG IRU WKH SURSRVHG UHFWHQQD WKH SRVLWLRQV RI WKH VKRUWLQJ SLQV FDQ EH WXQHG$FFRUGLQJWRWKHWKHRU\>@ZKHQWKHGLVWDQFHEHWZHHQ WKH SLQV DQG WKH FHQWHU RI WKH SDWFK LV FKDQJHG WKH FXUUHQW VWUHQJWKRQWKHHGJHVDQGFHQWHUDUHDVRIWKHSDWFKLVYDU\LQJ



)LJ7KHVLPXODWHGUHDOSDUW UHVLVWDQFH DQGLPDJLQDU\SDUW UHDFWDQFH RI WKH LPSHGDQFH RI WKH FHQWHUIHG SDWFK &)3  DQWHQQD RIIFHQWHUIHG SDWFK 2&)3 DQWHQQDDQGWKHSURSRVHG2&)3ZLWKVKRUWLQJSLQV



)LJ7KHVLPXODWHGUHDOSDUW UHVLVWDQFH DQGLPDJLQDU\SDUW UHDFWDQFH RI WKHSURSRVHGDQWHQQDZLWKGLIIHUHQWYDOXHVRISDUDPHWHUD

PDWFKLQJFLUFXLWFRPSRQHQWV7KHSHUIRUPDQFHRIWKHUHFWHQQD LV FRVLPXODWHG XVLQJ WKH $'6 DQG &67 VRIWZDUH 0RUH VSHFLILFDOO\DIUHTXHQF\GRPDLQSRZHUVRXUFHLVHPSOR\HGIRU WKH UHFWLILHU VLPXODWLRQ ZKHUH WKH SRUW LPSHGDQFH LV GLUHFWO\ OLQNHGWRWKHDQWHQQDLPSHGDQFHH[SRUWHGIURPWKH&67 ,,, 5(&7(11$3(5)520$1&(

 )LJ7KHUHFWHQQDGHVLJQXVLQJWKHSURSRVHG2&)3ZLWKVKRUWLQJSLQV7KH FDSDFLWRUVC1 = C2 Q)GLRGHVD1DQGD2 DUH+606DQGRL  Ÿ

)LJ  VKRZV DQ H[DPSOH RI VLPXODWHG 5)'& FRQYHUVLRQ HIILFLHQF\RIWKHFRPSOHWHUHFWHQQDZLWKGLIIHUHQWORFDWLRQVRI WKHSLQV SDUDPHWHUD 7KHHIILFLHQF\LVFDOFXODWHGE\Eff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



)LJ  7KH VLPXODWHG 5)'& FRQYHUVLRQ HIILFLHQF\ RI WKH SURSRVHG UHFWHQQD ZLWKGLIIHUHQWYDOXHVRID7KHUHFHLYHGSRZHUE\WKHUHFWHQQDLVG%P

 $VDQH[DPSOHZHKDYHVWXGLHGWKHHIIHFWVRQWKHUHVRQDQW IUHTXHQF\EDQGVRIWKHDQWHQQDE\FKDQJLQJWKHYDOXHRID7KH VLPXODWHGUHVLVWDQFHDQGUHDFWDQFHRIWKHSURSRVHGDQWHQQDDUH VKRZQLQ)LJ,WFDQEHVHHQWKDWWKHIRXUUHVRQDQWDQGDQWL UHVRQDQWIUHTXHQF\EDQGVRIWKHDQWHQQDDUHWXQDEOHIURPWR *+]ZKHQWKHYDOXHRIDLVFKDQJHGEHWZHHQWRPP :LWKRXW PRGLI\LQJ WKH SK\VLFDO GLPHQVLRQ RI WKH SDWFK WKH HOHFWULFDOVL]HRIWKHDQWHQQDLVWKHUHIRUHWXQDEOHIURPȜ0WR Ȝ0E\FKDQJLQJWKHSRVLWLRQVRIWKHVKRUWLQJSLQV ,WLVVKRZQWKDWE\PRGLI\LQJWKHFRQYHQWLRQDO&)3WRWKH SURSRVHG QRYHO 2&)3 ZLWK VKRUWLQJ SLQV WKH QXPEHU RI UHVRQDQWDQWLUHVRQDQW IUHTXHQFLHV RYHU WKH GHVLUHG IUHTXHQF\ EDQG ZLWK D IUHTXHQF\ UDWLR    LV LQFUHDVHG IURP  WR  0XOWLEDQG IUHTXHQF\WXQDEOH UHFWHQQD FRXOG WKHUHIRUH EH GHVLJQHG XVLQJ WKH SURSRVHG DQWHQQD ZLWKRXW WKH QHHG RI PDWFKLQJQHWZRUNV B. Rectifier Configuration 7KH VFKHPDWLF YLHZ RI WKH FRPSOHWH UHFWHQQD XVLQJ WKH SURSRVHG2&)3ZLWKVKRUWLQJSLQVLVVKRZQLQ)LJ$W\SLFDO YROWDJHGRXEOHUUHFWLILHULVVHOHFWHGGXHWRLWVKLJKFRQYHUVLRQ HIILFLHQF\DQGVLPSOHWRSRORJ\>@7KHFDSDFLWRUVDUHW\SLFDO  Q)FKLSFDSDFLWRUVIURP 0XUDWDWKHUHFWLI\LQJGLRGHVDUH 6FKRWWN\GLRGH+606IURP$YDJRDQGDW\SLFDOŸ UHVLVWRULVXVHGDVWKHORDG7KHUHFWLILHULVGLUHFWO\FRQQHFWHGWR WKH DQWHQQD SRUW ZLWKRXW WKH LQWURGXFWLRQ RI DQ\ DGGLWLRQDO 

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³(OHFWURPDJQHWLF HQHUJ\ KDUYHVWLQJ DQG ZLUHOHVV SRZHUWUDQVPLVVLRQ$XQLILHGDSSURDFK´Proc. IEEEYROQR SS±1RY >@ @ .1LRWDNL$*HRUJLDGLV$&ROODGRDQG-69DUGDNDV³'XDOEDQG UHVLVWDQFH FRPSUHVVLRQ QHWZRUNV IRU LPSURYHG UHFWLILHU SHUIRUPDQFH´ IEEE Trans. Microw. Theory Tech.YROQRSS±1RY  >@ & 6RQJ @ & 6RQJ @ & 6RQJ @ @ ;=KDQJDQG/=KX³3DWFKDQWHQQDVZLWKORDGLQJRIDSDLURIVKRUWLQJ SLQVWRZDUGV IOH[LEOHLPSHGDQFHPDWFKLQJDQGORZFURVVSRODUL]DWLRQ´ IEEE Trans. Antennas PropagYROQRSS±$SU