Lindsley D Colclough

US Patent:

57641951, Jun 9, 1998

Filed:

Jul 24, 1996

Appl. No.:

8/685812

Inventors:

Lindsley D. Colclough - Hingham MA
Richard J. Glenn - Abington MA
Richard J. Kumpfbeck - Huntington NY

Assignee:

Hazeltine Corporation - Greenlawn NY

International Classification:

H01Q 2126

US Classification:

343797

Abstract:

A multifunction antenna system is selectively operative over the UHF and VHF frequency ranges using a novel arrangement of symmetrically disposed phased radiating elements that function as a dipole turnstile type array at UHF and as a monopole at VHF. At VHF the UHF radiating elements and feedlines are fed in parallel against ground to produce a pattern similar to that of a short vertical monopole. VHF and UHF coupling networks offer low VSWR and minimize circuit losses when utilized with a folded dipole array. The compact, lightweight structure is adaptable to oceanic communications by installing in a towed radome adapted for water flotation, and provides low angle hemispherical UHF radiation without pattern switching, with the water surface providing a reflective ground plane.