Communications: radio wave antennas – Antennas – Measuring signal energy
Patent
1979-01-30
1981-05-26
Moore, David K.
Communications: radio wave antennas
Antennas
Measuring signal energy
343753, 343755, H01Q 128
Patent
active
042701295
ABSTRACT:
An antenna and a method for obtaining predetermined far field antenna patterns is disclosed. Empirical adjustments of a focal region feed system provides for the compensation of tolerance or other imperfections of the antenna to achieve the desired far field pattern. An element of the feed system is adjusted when the antenna is angularly positioned, with respect to a receiving element in the far field, which corresponds to the location of the element in the feed array. A desired far field pattern may also be achieved by illuminating the antenna aperture, either simultaneously or sequentially, by several plane waves, the amplitude and incident angles of which are carefully controlled, measuring the phase and amplitude of the focal region distribution caused by this illumination, and designing the feed system to establish a focal region distribution that is the complex conjugate of that measured.
REFERENCES:
patent: 3456260 (1969-07-01), Hannan
Herper John C.
Stangel John J.
Levine Seymour
Moore David K.
Sperry Corporation
Terry Howard P.
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