Double-face superminiature UHF RFID (ultra high frequency radio frequency identification) tag antenna derived from ENG (electronic news gathering) material
A technology of RFID tags and tag antennas, which is applied in the direction of antenna support/installation device, radiating element structure, etc., to achieve the effect of self-matching, total volume reduction, and good performance
Inactive Publication Date: 2013-04-03
BEIJING UNIV OF POSTS & TELECOMM
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The invention provides a method for solving the problem of further miniaturization of tag antennas, and is especially suitable for application in RFID ticketing systems, access control systems and other fields that require miniaturization and omnidirectional tag antennas
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[0023] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0024] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0025] Such as figure 1 Shown is a schematic structural diagram of a preferred embodiment of a double-sided ultra-small UHF RFID tag antenna derived from ENG materials in the present invention. This embodiment includes FR4(ε r =4.4,μ r =1) Substrate 3, RFID tag chip 1 (what used in this embodiment is Monza 4 chip, and the impedance when operating frequency is 915MHz is 11-j143Ω), electric small chip dipole 2, bent line structure 4, according to Depending on the conditions and requirements, the electric small patch dipole 2 and the meander wire structure 4 can be processed with conductors such as copper, aluminum or silver. The simulation results mentioned...
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The invention discloses a double-face superminiature UHF RFID (ultra high frequency radio frequency identification) tag antenna derived from an ENG (electronic news gathering) material and belongs to the technical field of radio frequency identification. Conductors are etched (or adopting other technical methods) on the right and reverse sides of a substrate of the tag antenna to serve as an antenna structure, one face of the substrate is small electric patch dipoles far smaller than working wavelength, the other face of the substrate is bent line structures derived from the ENG material, and each tag chip and two arms of corresponding small electric patch dipole are connected. The tag antenna can be applied to frequency ranges such as UHF or microwave, taking central frequency of 915MHz and the chip adopting Monza4 as an example, the total size of the tag antenna adopting the structure is only 19.2*32*0.7mm3 (0.059*0.098*0.002Lambada3), and the tag antenna has wider working bandwidth, omnidirectivity and extensive suitability and can be applied to other tag chips and working frequencies only by being simply adjusted. A method for solving the problem of further miniaturization of the tag antenna is provided, and the double-face superminiature UHF RFID tag antenna is especially suitable for fields needing miniaturization and omnidirectivity of the tag antenna such as RFID ticketing systems and access control systems.
Description
technical field [0001] The invention relates to a radio frequency identification electronic tag, especially an ultra-small and omnidirectional electronic tag. Background technique [0002] Radio Frequency Identification (RFID) technology is a technology that conducts non-contact two-way data communication through radio frequency to identify targets. An RFID system usually consists of a reader and an electronic tag. The electronic tag is composed of a tag chip and a tag antenna. It exchanges data with the reader through electromagnetic waves, and has functions such as intelligent reading and writing and encrypted communication. The tag antenna is a vital part of the RFID system. The RFID system transmits and receives electromagnetic waves through the tag antenna, thereby realizing the identification of the electronic tag by the reader. [0003] RFID systems mainly work in low frequency, high frequency, ultra high frequency and microwave frequency bands. Among them, the rad...
Claims
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IPC IPC(8): H01Q1/38H01Q1/22
Inventor 李莉王霖川
Owner BEIJING UNIV OF POSTS & TELECOMM