Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1993-07-19
1994-09-06
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342371, 342372, H01Q 322, H01Q 324
Patent
active
053452461
ABSTRACT:
There is disclosed an antenna device having low side-lobe characteristics comprising a pair of array antennas having the same construction. Each array antenna has array elements equidistantly arranged. The center-to-center distance between the array antennas is so determined that the angle of the first zero point of the array factor determined by the center-to-center distance equals the angle of the first side lobe point of the pattern of each array antenna. The array antennas are electrically connected so as to become excited in phase.
REFERENCES:
patent: 3811129 (1974-05-01), Holst
patent: 4228436 (1980-10-01), Dufort
patent: 4257050 (1981-03-01), Ploussios
patent: 4580141 (1986-04-01), Gutleber
Proceedings of the IEEE Proceedings Letters, vol. 66, No. 3, Mar. 1978, New York pp. 347-349, Vishwani D. Agrawal "Grating-Lobe Suppression in Phased Arrays by Subarray Rotation".
Blum Theodore M.
National Space Development Agency of Japan
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