Circularly Polarized Plasma Curl Antenna for 2.45 GHz Portable RFID Reader
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Abstract
In this paper, a broadband circularly polarized plasma curl antenna for portable RFID reader at 2.45 GHz is proposed. The antenna consists of a glass tube filled with argon gas and of about 1.4 wavelengths curled into one turn. A parametric study for the plasma curl antenna parameters is investigated. A simulated compact model for the portable RFID reader is proposed. The radiation characteristics of the plasma curl antenna enclosed inside a portable reader device are calculated. The behavior of plasma curl antenna is like a metal antenna when the signal is transmitted and received. Plasma antennas have many advantages as their design permit electrical, rather than mechanical control for their radiation characteristics. They are light weight, reconfigurable, can be energized, and de-energized in seconds, which prevent signal degradation. 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 radiation characteristics of the plasma curl antennas are investigated and analyzed using a finite integral technique.
Keywords
RFID Plasma antenna Portable reader Curl antennaReferences
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