Thin-type high-gain UHF RFID (ultrahigh frequency radio frequency identification) anti-metal tag antenna
An anti-metal tag, high-gain technology, which is applied to antennas, antenna supports/mounting devices, and devices that enable antennas to work in different bands at the same time, can solve problems such as antenna failure, difficult processing, and high cost, and achieve good commonality. The effect of yoke matching, good metal resistance and long recognition distance
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[0034] The present invention will be further described below through specific embodiments.
[0035] refer to figure 1 , figure 2 , a thin high-gain UHF RFID anti-metal tag antenna, including a dielectric substrate 10, and an upper metal patch 20 and a lower ground metal patch 30 respectively attached to the upper and lower surfaces of the dielectric substrate 10, the upper metal patch 20 A tag chip 40 is provided. Specifically, the present invention uses alumina ceramics with a dielectric constant εr of 9.8 and a tangent loss angle of tanθ of 0.0015 as the substrate of the antenna, which can effectively maintain the high gain and thickness of the antenna while ensuring that the material is easily available. It can also reduce the impact of the size of the metal surface on the performance of the tag antenna. The length of the dielectric substrate 10 is between 70mm-90mm, the width is between 35mm-45mm, and the thickness is between 0.5mm-1mm. The upper metal patch 20 is pro...
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