Patent ID: 6362785
Filing Date: 2002-03-26
Classification: H01Q

Abstract:
A compact cylindrical microstrip antenna, comprising:a cylindrical ground plane is enclosed by a cylindrical, dielectric microstrip substrate; a first conductive patch, being disposed on said microstrip substrate, having a ground end shorted to said ground plane and a first width; a second separate and distinct conductive patch, having a second width greater than said first width, being connected to said first conductive patch at a junction point opposite from said ground end, is disposed substantially around said microstrip substrate; an impedance transition length runs from an outer patch edge of said second conductive patch to said ground end, said first conductive patch protrudes from said second conductive patch; and said junction point causing an electric field that decreases said impedance transition length to a reduced impedance transition length to provide a compact antenna length and an azimuth radiation pattern.