Christophe Moreaux

Influence of Multiantenna Tag on the Read Range of a Passive UHF RFID System

This letter aims to study a multiantenna tag on a UHF RFID system. Impact of dual antenna on the read range is demonstrated. This letter shows that this enhancement is not only due to a better antenna gain, but also to the design of the backscattering system. Indeed, the backscattering modulator is connected on only one of the two inputs of the antenna. Measurements of prototypes designed in 0.18 CMOS process demonstrate that a tag with such a system stays visible for the reader around 2 m better than a one-antenna system.

Adaptive UHF RFID analog front end for communication range improvement

This paper describes an adaptive UHF radio frequency identification (RFID) analog front end designed in 130nm CMOS process. The main purpose is to extend communication range between the tag and reader complying with EPC Gen2 standard. The proposed adaptive architecture increases the effective range. An ASK demodulator (PR-ASK compliant) and a backscattering modulator are proposed to insure the communication at close range and at extended range.

Power optimized reading procedure for RFID (EPC Gen 2) data transmission enabled application: Example of a wireless temperature sensor

The goal of this paper is to present a scenario that optimizes a passive RFID data transmission without changing its standard. This procedure is based on the inventory process defined by the EPC Gen 2 protocol. An application of this procedure will be presented through a wireless temperature sensor concept and an ASIC implementation.