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:
Sep. 09, 1986
Filed:
Jun. 27, 1984
Donn V Campbell, Eatontown, NJ (US);
Palemon W Dubowicz, Eatontown, NJ (US);
Felix Schwering, Eatontown, NJ (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A vertically polarized array comprised of both bottom fed and top fed conurations having a driven element comprising at least one but, when desirable, two generally horizontal wire conductor segments of a length substantially equal to one half the operating wavelength of the array and with the ends of the half-wave conductor segments being connected to or extending into generally vertical quarter wavelength wire conductor segments. In a bottom fed configuration the feedpoint is at the bottom end of one vertical quarter wavelength conductor segment while in a top fed configuration one vertical quarter wavelength segment comprises a quarter wavelength of coaxial transmission line having one end configured into signal isolation means, comprising a cable choke, while the feedpoint is located at the other end. Behind the array, located at a distance of substantially a quarter wavelength, is a parasitic reflector element comprising a substantially identical structure as the driven element with the lower ends of the vertical quarter wavelength elements thereof positioned a foot or two above the surface of the ground. Such an arrangement provides unidirectional radiation and reception at low take-off angles, e.g. 20.degree. above the horizon.