2Hae-Won Son, Jung-Nam Lee, and Gil- Young Choi. Design of compact RFID reader antenna with high transmit/receive isolation[J], Wiley, Daejeon, 2006,48(12): 2478- 2480.
3S.K.Padhi, N.C.Karmakar, C.L. Law and S. Aditya .A dual polarized aperture coupled micro-strip patch antenna with high isolation for RFID applications, IEEE. trans, antenna and pagation. 2001,42(8): 1026-1030.