a scalable modular antenna configuration consisting of a spiral Travelling Wave Antenna (TWA) which series-feeds an embedded resonating ring slot antenna is proposed in this paper for NF UHF RFID desktop reader applications. The spiral TWA geometry allows for exciting an almost homogeneous field on the antenna surface, making the tag detection on the reader antenna (near-field reactive region) almost independent on tag location and orientation. The circular polarized ring slot antenna, which is embedded in the TWA, is used to extend the read range up to the radiative near-field region.
Near-field modular antenna for UHF RFID desktop reader applications
CASO, ROBERTO;MICHEL, ANDREA;BUFFI, ALICE
2014-01-01
Abstract
a scalable modular antenna configuration consisting of a spiral Travelling Wave Antenna (TWA) which series-feeds an embedded resonating ring slot antenna is proposed in this paper for NF UHF RFID desktop reader applications. The spiral TWA geometry allows for exciting an almost homogeneous field on the antenna surface, making the tag detection on the reader antenna (near-field reactive region) almost independent on tag location and orientation. The circular polarized ring slot antenna, which is embedded in the TWA, is used to extend the read range up to the radiative near-field region.File in questo prodotto:
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