Notch monopole antenna

A notch monopole antenna, comprising:

• a first dielectric substrate having first and second major opposite surfaces and an edge therebetween;
• a first elongated metallic layer deposited on the substrate first major surface having a continuously curved edge flaring away from the substrate edge and being closely spaced to the substrate edge at one end of the first layer and relatively widely spaced from said substrate edge at a first layer other end;
• a second dielectric substrate secured to the edge of said first substrate;
• a conductive ground plane deposited on an outer surface of the second substrate;
• transmission line means with first and second ends having an outer conductor, an inner conductor and an insulating material therebetween;
• a first end of the transmission means having its outer conductor electrically connected to the ground plane outwardly of the first metallic layer other end;
• a metallic strip deposited on the first dielectric substrate spaced from the first metallic layer and curved to correspond to the curve of the first metallic layer;
• and
• the second end of the transmission line means inner conductor being electrically connected to the metallic strip adjacent the first metallic layer other end.

A broad band, broad beam notch monopole antenna, comprising:

• dielectric substrate means having first and second major opposite surfaces with an edge surface therebetween;
• a metallic layer on the first major surface of the dielectric substrate means having a convexly curved edge facing the substrate means edge, said metallic layer curved edge including a first portion of relatively slight curvature spaced relatively close to the substrate means edge and a second portion of relatively large curvature spaced at a correspondingly greater distance from the substrate means edge;
• a conductive ground plane fixedly mounted to the substrate means edge surface and lying opposite the first and second metallic portions edge;
• transmission line means having an outer conductor and an inner conductor with insulation therebetween;
• a plurality of ferrite beads received in surrounding relationship about the transmission line means outer conductor;
• a metallic strip on the dielectric substrate second major surface extending along a path corresponding to the curve of the metallic layer edge and generally parallel thereto;
• a first end of the transmission line means outer conductor being connected to the ground plane adjacent the metallic layer first curved edge portion;
• and
• a first end of the transmission line means inner conductor being connected to an end of the metallic strip adjacent the metallic layer second curved edge portion and a second end of the strip being connected to the ground plane adjacent the metallic layer first curved portion.