Title :
Antenna Efficiency Calculations for Electrically Small, RFID Antennas
Author :
Galehdar, Amir ; Thiel, David V. ; O´Keefe, Steven G.
Author_Institution :
Centre for Wireless Monitoring & Applications, Griffith Univ., Nathan, Qld.
fDate :
6/29/1905 12:00:00 AM
Abstract :
Radio frequency identification (RFID) antenna efficiency is an important component of link budget design. A method of moments technique based on the summation of segment currents compares favorably with two different results obtained using the finite element method (radiation pattern integration and Wheeler cap). The efficiency of a resonant dipole was found to be proportional to the inverse square root of the conductivity. For a typical RFID meander line antenna in free space the relationship is more severe
Keywords :
antenna radiation patterns; antenna theory; finite element analysis; method of moments; radio links; radiofrequency identification; RFID antennas; Wheeler cap; electrically small antennas; finite element method; link budget design; method of moments technique; radiation pattern integration; radio frequency identification; resonant dipole; Antenna accessories; Backscatter; Conductivity; Dipole antennas; Finite element methods; Frequency; Moment methods; National electric code; Radiofrequency identification; Wire; Antenna efficiency; Wheeler cap; numerical electromagnetic code (NEC); radio frequency identification (RFID); wire antennas;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2007.891960
