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Optimal conditions for maximizing the effectively received power of reader receiver in passive ultra high frequency radio-frequency identification system are analyzed in this paper. The mismatched impendence affecting modulation index of tag backscatter link is discussed. Expressions of backscattered modulation indexes for calculating normalized effective received power of reader receiver, lower boundary of signal-to-noise ratio for demodulated output signal, and bit error rate are derived. Modulation indexes of backscatter link under different parameters are measured in open indoor environment. The measurement results show that the tag can be detected successfully when the modulation index of backscatter link is in a range from 5% to 10%.
[1] Preradovic S, Karakar N C, Balbin I 2008 IEEE Microwave Theory Mag. 9 90
[2] Nikitin P V, Rao K V S 2006 Proc. IEEE Trans. Antennas Propag. 48 212
[3] [4] Hou Z G, He Y G, Li B, She K, Zhu Y Q 2010 Acta Phys. Sin. 59 5606 (in Chinese)[侯周国、何怡刚、李 兵、佘 开、朱彦卿 2010 59 5606]
[5] [6] Tang Z J, He Y G 2009 Acta Phys. Sin. 58 5126 (in Chinese)[唐志军、何怡刚 2009 58 5126]
[7] [8] [9] Karthaus U, Fischer M 2003 IEEE J. Solid-State Circuits 38 1602
[10] Vita G D, Iannaccone G 2005 IEEE Trans. Microwave Theory Technol. 53 2978
[11] [12] Fuschini F, Piersanti C 2008 IEEE Antennas Wirel. Propag. Lett.7 33
[13] [14] Curty J P, Declercq M, Dehollain C, Joehl N 2009 Design and Optimization of Passive UHF RFID Systems (New York: Springer) p10
[15] [16] [17] Fan Z G 2007 Ph. D. Dissertation (Hangzhou: Zhejiang University) (in Chinese) [范志广 2007 博士学位论文 (杭州: 浙江大学)]
[18] [19] Zu Y X, Zhou J, Zeng C C 2010 Chin. Phys. B 19 9501
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[1] Preradovic S, Karakar N C, Balbin I 2008 IEEE Microwave Theory Mag. 9 90
[2] Nikitin P V, Rao K V S 2006 Proc. IEEE Trans. Antennas Propag. 48 212
[3] [4] Hou Z G, He Y G, Li B, She K, Zhu Y Q 2010 Acta Phys. Sin. 59 5606 (in Chinese)[侯周国、何怡刚、李 兵、佘 开、朱彦卿 2010 59 5606]
[5] [6] Tang Z J, He Y G 2009 Acta Phys. Sin. 58 5126 (in Chinese)[唐志军、何怡刚 2009 58 5126]
[7] [8] [9] Karthaus U, Fischer M 2003 IEEE J. Solid-State Circuits 38 1602
[10] Vita G D, Iannaccone G 2005 IEEE Trans. Microwave Theory Technol. 53 2978
[11] [12] Fuschini F, Piersanti C 2008 IEEE Antennas Wirel. Propag. Lett.7 33
[13] [14] Curty J P, Declercq M, Dehollain C, Joehl N 2009 Design and Optimization of Passive UHF RFID Systems (New York: Springer) p10
[15] [16] [17] Fan Z G 2007 Ph. D. Dissertation (Hangzhou: Zhejiang University) (in Chinese) [范志广 2007 博士学位论文 (杭州: 浙江大学)]
[18] [19] Zu Y X, Zhou J, Zeng C C 2010 Chin. Phys. B 19 9501
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