Abstract
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.
Original language | English |
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Title of host publication | 2016 10th European Conference on Antennas and Propagation, EuCAP 2016 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Electronic) | 9788890701863 |
DOIs | |
Publication status | Published - 31 May 2016 |
Event | 10th European Conference on Antennas and Propagation, EuCAP 2016 - Davos, Switzerland Duration: 10 Apr 2016 → 15 Apr 2016 |
Other
Other | 10th European Conference on Antennas and Propagation, EuCAP 2016 |
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Country/Territory | Switzerland |
City | Davos |
Period | 10/04/16 → 15/04/16 |
Keywords
- bow-tie elements
- reader antenna
- RFID