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Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/191672E2-9AB5-4576-BC89-707DA7449FB3 | ||
| Year | 2016 | ||
| Type of Item | Conference Full Paper | ||
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| Bibliographic Citation | A. Boursianis, A. Dimitriou, A. Bletsas and J. N. Sahalos, "A wideband UHF RFID reader antenna array with bow-tie elements," in 10th European Conference on Antennas and Propagation, 2016. doi: 10.1109/EuCAP.2016.7481912 https://doi.org/10.1109/EuCAP.2016.7481912 | ||
| Appears in Collections |
This paper presents the design procedure of a wideband UHF RFID reader antenna with polarization diversity suitable for searching tagged items. The antenna consists of a microstrip array with alternating orthogonal bow-tie elements, which are fed in series by a pair of microstrip lines. The elements are designed to provide the required bandwidth. The inter-element distance is adjusted to be about 0.8λ at the center frequency, whereas the elements provide in-phase excitation and create two orthogonal electric field components that give beams with polarization diversity. Simulated results indicate that the bandwidth covers the frequency bands of ETSI and FCC (865-928 MHz) standards. Regarding the coverage, it was deduced that the antenna can identify tagged items in a semi-cylindrical volume around its axis. The radius of coverage depends on the input power and tag sensitivity. A case study of reading tagged items in front of a cabinet with shelves is presented.
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