RFID tag capable of being safely used in microwave oven

Abstract

The invention relates to an RFID tag capable of being safely used in a microwave oven, and belongs to the technical field of radio frequency identification. A layer of material with high dielectric coefficient is configured on the upper layer or the lower layer of the known RFID antenna wire, so that the parasitic capacitance of the RFID tag can be increased, and the charge capacity which can be stored by a line can be increased under the same voltage or the voltage is relatively low under the same charge accumulation. When the tag is heated together with a pasted object in a microwave oven, the phenomenon of arc discharge or high-temperature deflagration caused by charges or high voltage accumulated on the RFID antenna is reduced and inhibited, and the effect of protecting the RFID IC andthe antenna is achieved. Therefore, the RFID tag can support longer heating time when heated in the microwave oven, or higher microwave heating power is allowed to be used, and the RFID tag is not burnt out as quickly as a known RFID tag.

Description

Technical field [0001] The invention relates to an RFID tag that can be safely used in a microwave oven and belongs to the technical field of radio frequency identification. Background technique [0002] In the conventional RFID inlay, the chip is connected to the antenna through ACP. For cost reasons, the chip is very small, so the contacts are smaller. In a microwave oven, because the antenna conductor line is reciprocated by microwaves, the reciprocating voltage and accumulated charge in the antenna become larger and larger, and then exceed the line's endurance limit. Arc discharge or deflagration occurs. [0003] Existing electronic tags used in microwave ovens include the following three types: [0004] The first type: such as figure 1 As shown in the figure, the conventional RFID UHF inlay uses a dipole antenna and packages the chip on the antenna wire. When an RFID inlay with this structure is attached to an object (mainly food) and heated in a microwave oven, the...

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Problems solved by technology

The RFID inlay of this structure is pasted on the article (mainly food), and when it is heated in a microwave oven, the resonant voltage charge of the antenna due to the action of the microwave is too large to cause a large current discharge to cause the contact between the chip and the antenna or the wire line to be damaged. Arc discharge or high-heat deflagration occurs at the small width or the sharp corner of the line, which has serious safety problems

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