The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 2001
Filed:
Feb. 12, 1999
Vladimir Volman, Newtown, PA (US);
Lockheed Martin Corporation, Sunnyvale, CA (US);
Abstract
A short axial-mode helical antenna (,) includes a winding (,) including a conductor (,) helically wound about an axis (,). A first portion (,) of the winding is wound with a first pitch (&agr;) on a segment of a cone (,) having a smaller diameter (D,) at a plane (,) adjacent a ground plane (,), and a larger diameter (D,) at a second plane (,) parallel with the ground plane and remote therefrom. A second portion (,) of the winding (,) is wound with a second pitch (&bgr;) on a segment of a second cone (,) coaxial with the first cone, and having its smaller diameter (D,) at a third plane (,) parallel with the first and second planes. The antenna provides higher gain than a straight uniform, tapered-end, continuous taped, or nonuniform-diameter helical antenna of equal length, and consequently has less mutual coupling when mounted in an array.