RFID read / write test

The RFID read/write test by using Anechoic box,signal analyzer and Programmable attenuator

Application

• The various radio waves flit in the office and the factory. (PC, Server, Wireless LAN and etc.)
• The radio waves of a public wireless and being used in other offices enter from the outside. (Cellular phone, Wireless LAN and PHS)
• If the DUT (device under test) is measured in the anechoic box, the correct data can be gotten because outside noise is inteercepted and internal radio wave is absorbed.
• The programmable attenuator with the frequency range from 750MHz to 12.5GHz enables the simulation of the receiving sensitivity.

object : slight wireless / 900MHz UHF band of RFID

Solution

Problem and solution

1. The measurement value from antenna displayed on a signal analyzer changes at each measurement
   => The measurement value becomes stable when the outside noise is cut off more than 60dB.
2. The strong reflection occurs in the shield box
   => The reflection decreases when it is absorbed more than 10dB by the radio wave absorber.
3. Fresnel zone is measured at the correct distance in the anechoic box
   => The measured data is almost same as in a chamber.
4. The handover test and the carrier sense level can be simulated by using the programmable attenuator together.

Usage example

slight wireless / 900MHz UHF band of RFID (Fresnel zone 35cm ellipse)

System configuration

Electromagnetic anechoic box MY1530	x 1
800MHz to 1GHz sleeve antenna M301	x 2
3.3GHz Signal analyzer MSA538	x 1
750MHz to 2.2GHzProgrammable attenuator MAT800E	x 1

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