A broadband antenna for the application to multi-standard UHF RFID tag

作者：Chu, Qing-Xin^*; Zeng, Rui-Hua

来源：Journal of South China University of Technology(Natural Science Edition), 2011, 39(5): 1-5.

DOI：10.3969/j.issn.1000-565X.2011.05.001

• Antenna impedance
• Broad-band antenna
• Frequency ranges
• Imaginary parts
• Inductively-coupled
• Measured results
• Simulation model
• Ultra-high frequency

Proposed in this paper is a broadband antenna for the application to multi-standard UHF RFID (Radio Frequency Identification) tag, which is composed of a dipole-like radiating body and a inductively-coupled feeding loop. The radiating body consists of two modified meandered dipole antennas different in length so as to form two resonance points only slightly different in frequency. Thus, the antenna impedance, especially its imaginary part, keeps steady in the frequency range of 840 to 956 MHz, and good conjugate impedance matching to the RFID tag chip is obtained. The bandwidth of the antenna varies from 816 to 988 MHz, which is wide enough to cover the global ultrahigh-frequency RFID frequency range, so that the tags with the proposed antenna can be used globally without replicate design and the cost is greatly reduced. Finally, an antenna prototype is fabricated based on the simulation model, with good accordance being found between the simulated and the measured results.

• 出版日期2011-5
• 单位华南理工大学