[射频]A Global SAW ID Tag with Large Data Capacity

Reprint from Proceedings of 2002 IEEE Ultrasonics Symposium g|~px$<iY  
Munich, Germany, October, 2002 Z [!"x&H]h  
Page 1 of 5 -#Zdf|  
A Global SAW ID Tag with Large Data Capacity }3#\vn0gT
 
Clinton S. Hartmann* TLwxP"  
RF SAW, Inc., 900 Alpha Drive, Richardson, Texas, U.S.A., 75081 {7M++J=  
Abstract - The Global SAW Tag uses a recentlyinvented 2"ax*MQH<^  
digital modulation based on simultaneous "jL>P)  
time position and phase shifting. A unique feature of ]+D@E2E
 
this tag is that it satisfies global RFID requirements H>TO8;5(  
using the international 2.44 GHz ISM band. <M:BN6-yG  
Precision amplitude and phase weighting of reflectors CFbNv9GZj  
and accurate control of parasitic effects is critical to ',EI[ ]+  
implementing this device. This tag has significantly :;{M0  
more data bits, lower insertion loss, and smaller die :HY$x  
area (i.e. lower cost) than previous SAW tags. These rFXdxRP;M  
improvements eliminate the shortcomings that have $TIeeTB  
previously limited the market for SAW RFID (radio Q}AZkZ  
frequency identification). A 2.44 GHz fundament .. rpow@@ad<  
t13V>9to  

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