Patent ID: 6486839
Filing Date: 2002-11-26
Classification: H01Q

Abstract:
An antenna comprising:a first quarter-wave whip pointing in a first direction; a second quarter-wave whip pointing in a second direction opposite to said first direction; axes of said first and second quarter-wave whips being substantially collinear; a base of said first quarter-wave whip being spaced along said axis from a base of said second quarter-wave whip a distance effective to establish a desired relationship between phases of signals received on said first and second quarter-wave whips; said first quarter-wave whip includes a first quarter-wave stub collinear therewith and pointing in said second direction; said second quarter-wave whip includes a second quarter-wave stub collinear therewith and pointing in said first direction; at least one of said first and second quarter-wave stubs including a dielectric; and said dielectric having a velocity factor to adjust an electrical quarter wavelength at a desired operating frequency to a physical dimension substantially equal to said distance.