Patent ID: 7450082

Claim:
A GPS antenna, usable for anti-jam operation, comprising; a ground plane portion having a central axis and an outer periphery; an excitation network; a plurality of radiating elements arrayed around said central axis, each said radiating element comprising: a radiator portion extending above said ground plane portion from an outer location above said periphery toward said central axis and including a section conductively attached to and extending nominally perpendicularly to said ground plane portion upward from said periphery to said outer location; a first capacitor portion capacitively coupled to said radiator portion and conductively coupled to said ground plane portion; an exciter portion extending below said radiator portion from a position above said periphery toward said central axis and coupled to said excitation network; and a second capacitor portion capacitively coupled to said exciter portion and conductively coupled to said ground plane section; and a central disk centered at said central axis, extending above said ground plane portion toward said first capacitor portion and conductively coupled to said ground plane portion.