Patent ID: 6018327
Filing Date: 2000-01-25
Classification: H01Q

Abstract:
An antenna for producing a beam that is tilted from a direction perpendicular to a surface of said antenna, comprising a single arm spiral antenna consisting of a single wire arranged in a circular spiral configuration extending outwards of a central axis, said single wire circular spiral configuration being located in a flat plane that is parallel to and spaced from a ground plane by about 1/4.lambda., .lambda. being the wavelength of the operating frequency of said single wire spiral antenna, said spiral antenna being electrically disconnected from said ground plane, said surface of said single wire spiral antenna being in said flat plane, and means for supplying a high frequency signal of wavelength .lambda. to said single wire spiral antenna, said circular spiral configuration in said single wire spiral antenna having a spiral circumference that is greater than 2.lambda. and no greater than 3.lambda..