Ultra-high frequency RFID label antenna for wirelessly measuring dielectric constant
A technology of RFID tags and dielectric constants, applied in the field of RFID tag antennas, can solve the problems of short reading distance of RFID tag antennas, poor parameters, large size of UHF RFID tag antennas, etc.
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[0012] Example: such as figure 1 and figure 2 As shown, a UHF RFID tag antenna for wirelessly measuring the dielectric constant includes a dielectric substrate 1, a radiation unit arranged on the upper surface of the dielectric substrate 1, and a matching unit arranged on the lower end surface of the dielectric substrate 1; the dielectric substrate 1 is a circle shape, the radius of the dielectric substrate 1 is 32.2 mm; the radiation unit includes a radio frequency chip 2, a first fan-shaped metal layer 3 and a second fan-shaped metal layer 4, and the first fan-shaped metal layer 3 and the second fan-shaped metal layer 4 are attached to the dielectric substrate 1, the left-right symmetrical plane of the dielectric substrate 1 is taken as the reference plane, the center line of the dielectric substrate 1 is located on the reference plane, the first fan-shaped metal layer 3 is located on the left side of the reference plane, and the second fan-shaped metal layer 4 is located o...
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