Coaxial waveguide antenna

Details Coaxial waveguide antenna Coaxial waveguide antenna

1975-11-07

1977-08-09

Lieberman, Eli

Communications: radio wave antennas

Antennas

With polarization filter or converter

343777, 343786, H01Q 1306, H01Q 1308

Patent

active

040414990

ABSTRACT:
Disclosed is a coaxial waveguide antenna. In a basic form the coaxial waveguide horn for the antenna comprises an inner section operating in a .SIGMA. (sum) mode only and an outer section operating in a .DELTA. (difference) mode only. Where required for broadband (i.e., for more than 1 octave), intermediate sections operating in .SIGMA. and .DELTA. modes are provided. The basic structure operates in the linear mode; for polarization diversity and circular polarization, a polarizer is placed in front of the horn, or a dielectric sheet is positioned within a coaxial waveguide section at an angle of 45.degree. as to the E field, or by feeding the coaxial waveguide with six or more number of probes.

REFERENCES:
patent: 3508277 (1970-04-01), Ware et al.
patent: 3665481 (1972-05-01), Woo
patent: 3864687 (1975-02-01), Walters et al.

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