Communications: radio wave antennas – Antennas – With spaced or external radio wave refractor
Patent
1983-08-19
1989-10-31
Hille, Rolf
Communications: radio wave antennas
Antennas
With spaced or external radio wave refractor
343908, H01Q 1906
Patent
active
048780596
ABSTRACT:
A nearfield/farfield transmission/reception antenna formed with a body of revolution having a somewhat saucer-like outside appearance. The body includes three main functional portions--a converter portion wherein farfield radiation is converted to "appear" like nearfield radiation and vice versa, a terminator portion which provides a constant-impedance termination for the converter portion, and a coupling-impedance transformer portion which matches the device to the impedance of a coaxial port in an external circuit. A ring-like driven element occupies an interface plane between the converter and terminator portions. Distributed on the outside curved surface of the body is a conductive electromagnetic/electrostatic shield.
REFERENCES:
patent: RE23051 (1948-11-01), Carter
patent: 2232179 (1941-02-01), King
patent: 2273447 (1942-02-01), Ohl
patent: 2398095 (1946-04-01), Katzin
patent: 2596190 (1952-05-01), Wiley
patent: 2669657 (1954-02-01), Cutler
patent: 2791770 (1957-05-01), Risser
patent: 3491361 (1970-01-01), Campbell
patent: 4234844 (1980-11-01), Yukl
patent: 4313122 (1982-01-01), Duppressoir et al.
patent: 4318108 (1982-03-01), Yukl
Hille Rolf
Spatial Communications, Inc.
Wimer Michael C.
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