Near-field UHF L-shaped dipole antenna array with LC-balun integration for item-level tagging systems.

A near-field UHF L-shaped dipole antenna array with LC-balun integration for item-level tagging systems is proposed and investigated in this letter. The antenna consists of four dipole antennas and an impedance matching network with four LC-baluns. Each dipole is fed by parallel stripline which connects to LC-baluns for miniaturization. The proposed near-field UHF dipole array can achieve not only the compact size (∼1/3λ₀ at 920 MHz) but also the seamless sensing of 100% read accuracy within the operating distance (up to 10.5 cm). [ABSTRACT FROM AUTHOR]