This thesis investigates multipath interference and the implication of this phenomenon for the design of future radio frequency identification devices, or RFID tags. The future radio frequency identification market and the design of appropriate tags is discussed. In particular utilising microwave carrier frequencies to extend tag-to-reader range and increase product functionality is considered. It is demonstrated that whilst the broader bandwidth inherent in microwave frequencies does allow an increase in RFID product functionality multipath interference effects will severely limit the range and reliability of microwave RFID devices. Through the development of a new mathematical framework describing multipath interference phenomena a range of models of the multipath propagation environment are constructed that allow the effects of multipath interference upon range and functionality of RFID devices to be investigated. From this fuller understanding of the effect of multipath interference upon RFID tag design a novel communications protocol is postulated that mitigates multipath effects and thus extends the range and reliability of low-microwave, radio frequency identification devices.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:616285 |
| Date | January 2000 |
| Creators | Norman, Terence R. |
| Publisher | University of Manchester |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
Page generated in 0.0017 seconds