Circularly polarized plasma curl antenna for 2.45 GHz portable RFID reader

Broadband circularly polarized plasma curl antenna for RFID reader at 2.45 GHz is proposed. The antenna consists of a tube filled with argon gas curled into one turn. A parametric study for the plasma curl antenna is investigated. A simulated compact model for portable RFID reader is proposed. The radiation characteristics of the plasma curl antenna enclosed inside the reader device are calculated. The behavior of plasma curl antenna is like metal antenna when the signal is transmitted and received. Plasma antennas have many advantages as their design, permit electrical, not mechanical control for their radiation characteristics. They are light weight, reconfigurable, can be energized and de-energized in seconds. When a particular plasma antenna is not energized, its radiation does not affect the nearby elements and allowing other antennas to transmit or receive without interference. The characteristics of the plasma antenna are investigated and analyzed using a finite integral technique.