Miniaturized, low-profile and three-ring-shaped RFID tag antenna capable of working under ultra high frequency (UHF) band
A technology of RFID tags and tag antennas, applied in miniaturized, omnidirectional electronic tags, and low-profile fields, to achieve good performance and reduced overall volume
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[0022] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0023] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0024] figure 1 It is a structural schematic diagram of a preferred embodiment of a miniaturized, low-profile, three-ring RFID tag antenna working in the UHF frequency band of the present invention. This embodiment includes a rectangular substrate 4 (ε r =4.4,μ r =1), RFID tag chip 5 (Monza4 chip is used in this embodiment, the impedance is 11-j143Ω when the working frequency is 915MHz), inner ring 1, smaller outer ring 2 and larger outer ring 3. By adjusting the dielectric constant and thickness of the substrate 4, the inner ring 1, the smaller outer ring 2, the larger outer ring 3 and the size of their openings, the input impedance and operating frequenc...
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