Patent ID: 6466176
Filing Date: 2002-10-15
Classification: H01Q

Abstract:
A multi-band antenna which is resonant and radiant at a high frequency band and at least one lower frequency band, comprising:a dielectric substrate having opposed faces; an electrically-conductive layer serving as a ground plane on one face of the dielectric substrate; an electrically conductive feed line carried on the opposite face of the dielectric substrate, said feed line having at least one feed end and at least one load end; a slot formed in said ground plane having a feed side and a load side with respect to said feed end and load end, said slot being electromagnetically coupled to said feed line such that said slot is resonant and radiant at said high frequency band; and a further electrical conductor electrically connected to said ground plane to serve as a continuation thereof at the load side of said slot, said further electrical conductor being dimensioned, located and electromagnetically coupled to said slot at said lower frequency band such as to cause said slot to be resonant and radiant also at said at least one lower frequency band.