Communications: radio wave antennas – Antennas – With spaced or external radio wave refractor
Patent
1976-11-18
1978-03-14
Lieberman, Eli
Communications: radio wave antennas
Antennas
With spaced or external radio wave refractor
343840, 343909, 350162R, H01Q 1502
Patent
active
040793826
ABSTRACT:
The present invention relates to a quasi-optical frequency multiplexer which permits the bidirectional conversion of at least two intermediate angularly-distinct planar wavefronts, where each distinct planar wavefront corresponds to the wavelength of a separate radio channel, into a single directional wavefront by the use of a blazed diffraction grating mounted at the aperture of an antenna. More particularly, a single directional planar wavefront, comprising the wavelengths of at least two radio channels, is diffracted out of the blazed diffraction grating into at least two angularly-distinct intermediate planar wavefronts corresponding to the at least two radio channels. By properly placing separate feedhorns at the precise location on the focal plane of the antenna where each angularly-distinct intermediate planar wavefront is focused, the radio channels can be separated, or alternately combined in the reverse manner.
REFERENCES:
patent: 2530580 (1950-11-01), Lindenblad
patent: 2665383 (1954-01-01), Marie
patent: 3144606 (1964-08-01), Adams et al.
Bell Telephone Laboratories Incorporated
Lieberman Eli
Pfeifle Erwin W.
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