Influence of the Non-Linear UHF-RFID IC Impedance on the Backscatter Abilities of a T-Match Tag Antenna Design
In ultra-high-frequency radio-frequency-identification (UHF-RFID) the conjugate complex matching of the packaged UHF-RFID transponder IC and the tag antenna structure is important to increase the reading range of the transponder tag. Quite often half-wavelength dipole-like antenna structures are use...
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| Veröffentlicht in: | IEEE transactions on magnetics 2012-02, Vol.48 (2), p.755-758 |
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| container_title | IEEE transactions on magnetics |
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| creator | Bauernfeind, Thomas Preis, Kurt Koczka, Gergely Maier, Stefan Biro, Oszkar |
| description | In ultra-high-frequency radio-frequency-identification (UHF-RFID) the conjugate complex matching of the packaged UHF-RFID transponder IC and the tag antenna structure is important to increase the reading range of the transponder tag. Quite often half-wavelength dipole-like antenna structures are used. Due to the fact that the impedances of the packaged IC and the dipole antenna structure are in different domains, a matching structure is needed to accomplish the conjugate complex matching. A common technique to carry out the matching is the so called T-match. Since the nominal input impedance of the IC depends on the applied antenna voltage (and in a strongly non-linear way), the backscatter abilities of the tag are also functions of the applied voltage. In the present work those dependencies are investigated in terms of full-wave finite element simulations and measurements. |
| doi_str_mv | 10.1109/TMAG.2011.2174971 |
| format | Article |
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Quite often half-wavelength dipole-like antenna structures are used. Due to the fact that the impedances of the packaged IC and the dipole antenna structure are in different domains, a matching structure is needed to accomplish the conjugate complex matching. A common technique to carry out the matching is the so called T-match. Since the nominal input impedance of the IC depends on the applied antenna voltage (and in a strongly non-linear way), the backscatter abilities of the tag are also functions of the applied voltage. 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| subjects | Antenna measurements Cross-disciplinary physics: materials science rheology Dipole antennas Exact sciences and technology Impedance Integrated circuits Materials science Other topics in materials science Physics Radar cross section radio-frequency-identification (RFID) tag Transponders UHF antennas ultra-high-frequency (UHF) antennas |
| title | Influence of the Non-Linear UHF-RFID IC Impedance on the Backscatter Abilities of a T-Match Tag Antenna Design |
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