H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/28
H05B 41/24 (2006.01) H01J 65/04 (2006.01)
Patent
CA 1144980
21158 -21- ELECTRODELESS FLUORESCENT LIGHT SOURCE HAVING REDUCED FAR FIELD ELECTROMAGNETIC RADIATION LEVELS ABSTRACT OF THE DISCLOSURE An electrodeless fluorescent light source includes an electrodeless fluorescent lamp (70) having a phosphor coating on its inner surface (74) and an induction coil (72) wherein the magnitude of the far field electromagnetic radiation, produced directly by the induction coil (72), is minimized. The induction coil (72) is driven by a high frequency power source (78). The induction coil (72) includes current loops which are configured so that the magnetic dipole moment of each current loop is offset by the magnetic dipole moment of other current loops in order to minimize the net magnetic dipole moment of the induction coil (72). One embodiment of the induction coil (72) includes a conductor wound in the shape of a square prism. The current on adjacent side edges of the prism is in opposite directions, thus resulting in two pairs of mutually opposing magnetic dipole moments.
351218
Gte Laboratories Incorporated
R. William Wray & Associates
LandOfFree
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