Title :
A Reevaluation of the Radiation Q Bounds for Loop Antennas
fDate :
6/1/2009 12:00:00 AM
Abstract :
A new realistic lower bound for the radiation Q of loop antennas is presented. It includes the contribution of energy within a circumscribed sphere, and is at least three times the often-referenced Q based only on external energy. The new bound is compared with actual Q values over a range of electrical diameters and aspect ratios, using design equations and electromagnetic simulations.
Keywords :
Q-factor; antenna theory; equivalent circuits; loop antennas; Q bounds radiation reevaluation; Q-factor; antenna theory; design equation; electrical diameters; electromagnetic simulation; equivalent circuits; loop antennas; realistic lower bound; Equations; Q factor; antenna measurements; antenna theory; electrically small antennas; equivalent circuits; loop antennas; spherical antennas;
Journal_Title :
Antennas and Propagation Magazine, IEEE
DOI :
10.1109/MAP.2009.5251193
