Patent ID: 6121930
Filing Date: 2000-09-19
Classification: H01Q

Abstract:
A microstrip antenna comprising:a dielectric substrate having a bottom surface and a top surface,a conductor on said bottom surface and constituting an antenna ground,a conductor occupying an area of said top surface and constituting a patch, andan elongate conductor extending in a coupling direction, lying in a plane of said top surface, and separated from said patch on at least one side of said elongate conductor by a lateral gap having a width, said elongate conductor constituting a coupling line extending in said coupling direction and formed by a set of two conductors including a coupling strip, said antenna having terminals which are parts of said two conductors of said coupling line, said coupling line coupling said antenna with a signal supplied to the antenna terminals, said coupling line coupling constituting antenna coupling,wherein said width of the lateral gap is sufficiently small for said antenna coupling to be coupled by a lateral coupling effect distributed in said coupling direction and resulting from interaction between said coupling strip and said patch across said gap, said gap then constituting a coupling slot, andwherein said coupling strip, extends in said area of said top surface and being separated from said patch by two coupling slots on respective opposite sides of said strip, said signal is supplied a connection point inside said area.