Airborne VHF antennas

Details Airborne VHF antennas Airborne VHF antennas

1997-03-18

1999-05-04

Wong, Don

Communications: radio wave antennas

Antennas

Slot type

343771, 333237, H01Q 1310

Patent

active

059008431

ABSTRACT:
A compact high gain VHF antenna for airborne synthetic aperture radar to detect targets concealed behind trees and forests. The antenna is formed by cutting a slotline in the middle of the top wall of a very thin waveguide along its axis. The waveguide can be folded and mounted on the underside of the wings of an aircraft with minimum protrusion and wing drag. The antenna produces a downward and side-looking beam with horizontal polarization for maximum foliage penetration and target detection. The antenna design can be scaled to any frequency for ground based and shipboard applications.

REFERENCES:
patent: 2908000 (1959-10-01), Robinson, Jr.
patent: 2996715 (1961-08-01), Rumsey et al.
patent: 3150375 (1964-09-01), Bevan et al.
patent: 3512161 (1970-05-01), Jennetti
patent: 3978485 (1976-08-01), Bonnaval
patent: 4330784 (1982-05-01), Ryno et al.
patent: 4410890 (1983-10-01), Davis et al.
patent: 4451830 (1984-05-01), Lucas et al.
patent: 5717410 (1998-02-01), Ohmine et al.
patent: 5717411 (1998-02-01), Knop et al.

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