....................................... 69
4.3.1 Nature of Antennas Suitable for RFID .................................................................. 69
4.3.2 Label Antenna Equivalent Circuits ........................................................................ 72
4.3.3 Matching to an RFID Chip Impedance ................................................................. 72
4.3.4 Environmental Constraints...................................................................................... 74
4.3.5 Performance Measure............................................................................................... 75
4.4 Label Antenna Design Methodology................................................................................ 78
4.4.1 Design Requirements ............................................................................................... 78
4.4.2 Design Methodology ................................................................................................ 78
4.5 Illustrating a Novel Antenna Design................................................................................ 80
4.5.1 Antenna Requirements, Material, and RFID IC Impedance .............................. 81
4.5.2 Antenna Type............................................................................................................ 81
4.5.3 Bow-Tie Antenna Design.
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