An rfid electronic tag
A technology of electronic tags and inductance, which is applied in the field of RFID electronic tags, can solve problems such as difficult miniaturization designs, and achieve the effects of improving performance, improving inductive impedance, and reducing volume
Inactive Publication Date: 2016-08-10
舟山麦克斯韦物联网科技有限公司
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- Description
- Claims
- Application Information
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Problems solved by technology
[0007] However, in the prior art, the imaginary part of the inductive impedance of the tag antenna is provided by the matching ring, and the larger the size of the matching ring, the greater the imaginary part of the inductive impedance; in the prior art, it is necessary to provide an inductive impedance of nearly 200 ohms The imaginary part requires a matching ring area of 15mm*15mm or more, making it difficult to miniaturize the design
Method used
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Embodiment Construction
[0040] refer to Figure 5 and Figure 6 As shown, the present invention provides an RFID electronic tag, which includes a chip 2 and an antenna 3 assembled on a PCB board 1, and the PCB board 1 is a cuboid surrounded by a PCB top layer 10, a PCB bottom layer 12 and a PCB side wall structure, the chip 2 is soldered on the PCB top layer 10, in this embodiment, the chip 2 is soldered to the end of the PCB top layer 10, which is convenient for wiring connection. Both ends of the chip 2 are provided with chip pads 20, and the chip pads 20 are located on the top layer of the PCB and are used for welding the label chip. Described antenna 3 is electrically connected with PCB board and chip 2, is used for receiving and reflecting RFID signal, and it comprises connected antenna arm 30 and plane spiral inductance 32, and antenna arm 30 is outwardly symmetric by both sides bottom ends of PCB board 1 The ground extension is used for receiving and transmitting signals. The planar spiral i...
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The invention provides an RFID (radio frequency identification device) electronic tag. The RFID electronic tag comprises a chip and an antenna, wherein the chip is assembled onto a PCB (printed circuit board), two ends of the chip are arranged on a chip solder pad; the antenna is used for receiving and reflecting an RFID signal and comprises an antenna arm and a plane spiral inductance, which are connected with each other, the antenna arm is formed by extending two sides of the PCB outwards, the plane spiral inductance is arranged on the PCB, and the input end and the output end of the antenna are respectively electrically connected with the chip solder pad; and the tag antenna arm and the plane spiral inductance which is loaded on the chip solder pad are matched with impedance conjugate. By loading the plane spiral inductance, the perceptual impedance of the antenna can be greatly improved under the limit size of the electronic tag, the impedance matching degree of the antenna and the chip can be improved, the structure design of the existing matching ring is substituted, the size of the tag is reduced, and the miniaturized application of the tag can be greatly enlarged.
Description
technical field [0001] The invention relates to an electronic tag, in particular to an RFID electronic tag with planar spiral inductance. Background technique [0002] In the application of UHF RFID tags, there are strict requirements on tag size and flexibility: for example, tags embedded in tire rubber, since there are fixed metal wires distributed in tire rubber, the tag size must be as small as possible to avoid interference; Since the rubber will be deformed or even cracked during the shaping and use of the tire, the label must have a certain degree of flexibility to avoid the failure of the label due to the deformation of the rubber; at the same time, the label must be flexible, because the label If a hard object with a certain size is embedded in the tire rubber, it will be a great hidden danger to the quality and safety of the tire. [0003] Conventional flexible labels based on PET materials cannot be used in tire rubber due to their large size; labels using PCB or...
Claims
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IPC IPC(8): G06K19/077
Inventor 章伟赵田野
Owner 舟山麦克斯韦物联网科技有限公司