RFID Rag Using Electromagnetic Band Gap Substrate
The present invention relates to an RFID Tag and Antenna for use with an RFID tag and a method of radio frequency identification (RFID). The RFID Tag comprises a RFID chip 5 for storing data, an antenna 6 and an electromagnetic band gap substrate 12. The RFID chip 5 and the antenna 6 are mounted above the electromagnetic band gap substrate 12. The electromagnetic band gap substrate has a reflection phase which is different from 180o at the operation frequency of the antenna. The electromagnetic band gap substrate enables the RFID to operate even if it is mounted on a conductive object, as the reflection phase is not 180o so it does not destructively interfere with the radiation from the antenna at the operating frequency. Preferably the reflection phase is between 340o and 115o or -95o and 145o. The preferred embodiment uses a band gap substrate having two mushroom-like conductive layers 3, 7 with a dielectric in between.
Countries or Regions:
USA
Invention Code:
TTC.PA.325S
Contact Us:
okt@ust.hk
Authors:
Key Features:
Specification:
Category:
TAP - Communications
Reference:
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