A RFID DENSE ANTENNA FOR CASINO CHIPS

摘要

PURPOSE: An RFID-congested antenna for a casino chip minimizes the interference between an adjacent antenna and a reader, improving the tag recognition rate. CONSTITUTION: An impedance transformer matches internal impedance of a power source to load impedance. A resonance adapter (30) produces a resonant frequency. First and second input terminals (112, 114) are connected to an output terminal of the resonance adapter. The other end of first and second coupling tuning portions (200, 250) are respectively connected to the first and second input terminals. The first and second coupling tuning portions reduce the interference of an adjacent antenna.