[射频]2-D Localization and Identification Based on

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 51, NO. 5, MAY 2003 Bx&F*a;5  
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2-D Localization and Identification Based on
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SAW ID-Tags at 2.5 GHz ZZJXd+Q}  
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Thomas F. Bechteler and Hüsnü Yenigün 
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Abstract—An identification and localization system based on x-3!sf@  
surface acoustic wave (SAW) radio sensors is presented in this ;p U=>  
paper. This system is able to identify and localize objects within ~~D =Z#  
a two-dimensional area. Identification is done with a fixed coded -'jPue2\  
passive SAW identification-tag. Localization is done with three \XI9 +::%  
receiving antennas and with a following analysis of time delay ;?`l1:C5)  
between the sent interrogation signal and the received signals. .gS x`|!  
For practical tests, a special interrogator has been established, as LNR~F_64Q  
well as the receiving and demodulation unit. The whole system is ! !9l@  
controlled by a computer. qV`JZ\n  
Index Ter .. {?zbrgQ<Z  
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