[1] [1] BONG F L, LIM E H, LO F L. Compact orientation insensitive dipolar patch for metal-mountable UHF RFID tag design［J］. IEEE Transactions on Antennas and Propagation, 2018,66(4):1788-1795.

[3] [3] GENOVESI S, MONORCHIO A. Low-profile three-arm folded dipole antenna for UHF band RFID tags mountable on metallic objects［J］. IEEE Antennas and Wireless Propagation Letters, 2010,9:1225-1228.

[4] [4] KIM D, YEO J. Dual-band long-range passive RFID tag antenna using an AMC Ground plane［J］. IEEE Transactions on Antennas and Propagation, 2012,60(6):2620-2626.

[5] [5] GAO B, YUEN M M F. Passive UHF RFID packaging with electromagnetic band gap (EBG) material for metallic objects tracking［J］. IEEE Transactions on Components, Packaging and Manufacturing Technology, 2011,1(8):1140-1146.

[6] [6] SON H W, JEONG S H. Wideband RFID tag antenna for metallic surfaces using proximity-coupled feed［J］. IEEE Antennas and Wireless Propagation Letters, 2011,10:377-380.

[8] [8] JAAKKOLA K. UHF RFID transponder antenna solutions for enhanced performance and producibility［D］. Helsinki: Aalto University, 2019.

[9] [9] RAO K V S, NIKITIN P V, LAM S F. Antenna design for UHF RFID tags: A review and a practical application［J］. IEEE Transactions on antennas and propagation, 2005,53(12): 3870-3876.

[10] [10] QING X, GOH C K, CHEN Z N. Impedance characterization of RFID tag antennas and application in tag Co-design［J］. IEEE Transactions on Microwave Theory and Techniques, 2009,57(5):1268-1274.