Patent ID: 7006043
Filing Date: 2006-02-28
Classification: H01Q

Abstract:
1. An electrically small, wideband circularly polarized compact microstrip antenna, comprising: a radiating arch on a top surface of a microstrip dielectric substrate, said radiating arch further comprising a plurality of arc-shaped segments terminating in straight edges defining a plurality of gaps between said segments; said microstrip dielectric substrate being stacked on a conductive ground plane; said radiating arch, being thinner than said dielectric substrate, and said dielectric substrate being at least as thick as said ground plane; a center probe of a coaxial connector projects upwardly through said ground plane, said dielectric substrate and an opening in a first one of said segments, said opening having an opening diameter greater than a probe diameter of said center probe prevents an electrical contact between the said center probe and said first segment; said antenna having a given length, A said radiating arch having an inner edge, an outer edge, a first straight end, a second straight end and a path length difference between said plurality of gaps, said inner edge being shorter than said outer edge; said radiating arch generating a plurality of electrical fields perpendicular to said first end, said second end and said plurality of straight edges; and said radiating arch, said perpendicular electrical fields and said path length difference permits said leaky wave radiation to leak by propagating under said segments, advantageously causing an increased bandwidth and resulting in a wideband circularly polarized radiation with a 47% bandwidth permitting a decreased antenna length, A