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Flat plate antenna of radio frequency identification tag

A technology of radio frequency identification tags and flat antennas, applied in the field of flat antennas of radio frequency identification tags, can solve the problems of inability to match the impedance of tag chips, inability to be widely used, and limited identification distance.

Inactive Publication Date: 2008-01-23
TATUNG COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although the traditional panel antenna 200 achieves the purpose of miniaturization, the 50-ohm matching concept it adopts cannot achieve good impedance matching with the tag chip.
[0006] To sum up, the traditional panel antenna cannot take into account the purpose of miniaturization and impedance matching in application
In other words, when the radio frequency identification system uses the traditional panel antenna, the identification distance covered by it will be limited, and it cannot be widely used in other systems

Method used

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  • Flat plate antenna of radio frequency identification tag
  • Flat plate antenna of radio frequency identification tag
  • Flat plate antenna of radio frequency identification tag

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Embodiment Construction

[0034] In order to meet the miniaturization and impedance matching required in the application of the radio frequency identification tag's planar antenna, the present invention obtains the optimal size of the fractal dipole antenna through repeated design and experimental results. Compared with the traditional panel antenna, the panel antenna of the present invention not only has a miniaturized appearance, but also can effectively improve the identification distance of the radio frequency identification system. The panel antennas of the present invention will be illustrated below, but they are not intended to limit the present invention. Those in the industry can slightly modify the following embodiments according to the spirit of the present invention, but they still fall within the scope of the present invention.

[0035] Fig. 3 is a schematic structural diagram of a planar antenna of a radio frequency identification tag according to an embodiment of the present invention. T...

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Abstract

A plate antenna with a radio frequency identification tag receives an electromagnetic signal, which comprises a dielectric slab and a fractal dipole antenna. Wherein, height of the fractal dipole antenna achieves 30% to 70% of half wavelength of the electromagnetic signal, and width of the antenna reaches 70% to 110% of half length of the electromagnetic signal. The plate antenna utilizes an optimal size of the fractal dipole antenna to fulfill miniature and excellent matching.

Description

technical field [0001] The present invention relates to a panel antenna, and in particular to a panel antenna suitable for radio frequency identification (RFID) tags. Background technique [0002] In recent years, the radio frequency identification system has gradually replaced the existing barcode label system due to its advantages of non-contact identification, simultaneous reading of multiple labels, and data security. The radio frequency identification system has a wide range of applications, such as access control cards, leisure cards, plant identification chips, etc., and it can also be used in logistics control, library management, and medical drug management in the future. [0003] The RFID system mainly includes a reader system and a tag system. The code reading system uses electromagnetic signals to transmit label information to the labeling system. The tag system uses the flat panel antenna to send and receive electromagnetic signals, and uses the tag chip to ju...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q9/16G06K19/07
Inventor 黄启芳詹景晴
Owner TATUNG COMPANY
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