RFID Tag and Antenna

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 180° 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 180° so it does not destructively interfere with the radiation from the antenna at the operating frequency. Preferably the reflection phase is between 340° and 115° or -95° and 145°. The preferred embodiment uses a band gap substrate having two mushroom-like conductive layers 3 7 with a dielectric in between.

　

Countries or Regions:

US

　

Invention Code:

IP.PA.00325

　

Contact Us:

okt@ust.hk


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TAP - Communications
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