Convert Uhf Rfid Tag From Passive To Semi-passive Tag Using External Power Sources

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Title: Convert Uhf Rfid Tag From Passive To Semi-passive Tag Using External Power Sources
Author: Mehta, Tanvi
Abstract: In this thesis , I present novel circuit designs that convert a passive radio frequency identification (RFID ) tag into a semi -passive RFID tag . Passive RFID tags are relatively inexpensive to purchase and to integrate into objects and devices . However , in some environments and on some objects the performance of the pure passive tags is not sufficient for the intended applications . A semi -passive tag , in comparison to a pure passive tag , has significantly greater communication range since the semi -passive tag derives its operational power from an on -tag power source instead of just from an interrogator's communication signal . As a result , semi -passive tags have greater usability in a broad range of applications . My novel circuit designs act as an additional on -tag power source and are intended to be low -cost additions to an existing passive tag operating in the UHF (Ultra -High Frequency ) frequency range . Thus , currently deployed tags may be retrofitted in the field as their intended applications change and demand greater communication range . Prototype implementations of my designs were able to increase the read range of a passive UHF RFID tag by up to 39 % .
URI: http : / /hdl .handle .net /10106 /5524
Date: 2011-03-03

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Convert Uhf Rfid Tag From Passive To Semi-passive Tag Using External Power Sources. Available electronically from http : / /hdl .handle .net /10106 /5524 .

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