Method for testing sensitivity and read-write distance of ultra-high frequency radio frequency identification (UHF RFID) label by using giaga-hertz transverse electromagnetic (GTEM) cell

A sensitivity and labeling technology, applied in the application field of GTEM cells, can solve the problems of large measurement error, high cost, large floor space, etc., and achieve the effect of low equipment cost and simple operation.

Inactive Publication Date: 2011-02-23
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

These test environments are inevitably subject to electromagnetic interference, which makes the meas

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  • Method for testing sensitivity and read-write distance of ultra-high frequency radio frequency identification (UHF RFID) label by using giaga-hertz transverse electromagnetic (GTEM) cell
  • Method for testing sensitivity and read-write distance of ultra-high frequency radio frequency identification (UHF RFID) label by using giaga-hertz transverse electromagnetic (GTEM) cell
  • Method for testing sensitivity and read-write distance of ultra-high frequency radio frequency identification (UHF RFID) label by using giaga-hertz transverse electromagnetic (GTEM) cell

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Embodiment Construction

[0014] 1, 2, and 3 in the figure are the top plate, middle plate and bottom plate of the GTEM cell, 4 is the port of the GTEM cell, 5 is the UHF RFID tag to be tested, 6 is the UHF RFID test system reader, and 7 is the UHF RFID tag placement range .

[0015] The method for testing UHF RFID tag sensitivity and read-write distance thereof with a GTEM cell of the present invention, the specific implementation method comprises the steps:

[0016] A. Place the tag 5 to be tested in the middle third of the middle plate and the bottom plate in the GTEM cell. The maximum radiation (receiving) direction of the tag 5 is aligned with the port of the GTEM cell, and connect the port of the GTEM cell to the UHF RFID test system. 6.

[0017] B. Adjust the transmitting power of the UHF RFID testing system 6 to find the minimum transmitting power that is transmitted into the port of the GTEM cell when the tag 5 can reflect the signal.

[0018] C, when the UHF RFID test system 6 transmits the...

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Abstract

The invention discloses a method for testing the sensitivity and read-write distance of an ultra-high frequency radio frequency identification (UHF RFID) label by using a giaga-hertz transverse electromagnetic (GTEM) cell, which comprises the following steps of: putting a label to be tested in the specific direction of a specific area in a GTEM cell; arranging a UHF RFID test system (which has the functions of a UHF RFID reader and label signal analysis) at the port of the GTEM cell to test the minimum transmitted power of the system when the label can reflect a signal; and calculating electromagnetic field intensity at the periphery of the label by using a relevant formula of the GTEM cell to obtain the sensitivity (the minimum electromagnetic field intensity) indicating that the label can reflect the signal, and then calculating the read-write distance of the UHF RFID label in a free space through the formula provided by the invention. The sensitivity and the read-write distance of the label are calculated by the formula provided by the method, so the method is easy to operate and has low cost and the sensitivity and the read-write distance are accurately measured.

Description

technical field [0001] The invention relates to the application of a GTEM cell, in particular to a method for testing UHF RFID tag sensitivity and reading and writing distance by using the GTEM cell. Background technique [0002] In the test of UHF RFID system, the test of tag sensitivity and read-write distance is an important content. Traditional methods require the receiving antenna to be placed in free space or in a dark room. These test environments are inevitably subject to electromagnetic interference, resulting in relatively large measurement errors, or time-consuming, labor-intensive, high-cost, and large-occupied areas. [0003] Therefore, a relatively simple and cheap test equipment is needed, and it is a very suitable choice to use the GTEM cell to test the sensitivity and read-write distance of UHF RFID tags. Compared with radio anechoic chambers and semi-dark chambers, the main advantages of using GTEM chambers for UHF RFID tag sensitivity and read-write dist...

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Application Information

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IPC IPC(8): G06K17/00
Inventor 李书芳陈志雨洪卫军左中梁刘晓阳
Owner BEIJING UNIV OF POSTS & TELECOMM
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