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Please use this identifier to cite or link to this item:
http://hdl.handle.net/1783.1/6388
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| Title: | RFID tag and antenna |
| Authors: | Yuen, Matthew Ming-Fai
Gao, Bo
Murch, Ross David
Cheng, Chi Ho |
| Keywords: | RFID Tag
RFID antenna
Electromagnetic band gap
Insensitive objects
Metallic objects
EBG |
| Issue Date: | 3-Nov-2009 |
| Citation: | US Patent 7,612,676 B2, 2009 |
| Abstract: | 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. |
| Rights: | This patent is also available at HKUST Technology Transfer Center Patent Search at <http://patentsearch.ttc.ust.hk/ListPatentsDetail.asp?id=532> |
| URI: | http://hdl.handle.net/1783.1/6388 |
| Appears in Collections: | MECH Patents
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Files in This Item:
| File |
Description |
Size | Format |
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| US7612676.pdf | | 663Kb | Adobe PDF | View/Open |
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