Communications: radio wave antennas – Antennas – Wave guide type
Patent
1980-10-29
1982-12-14
Moore, David K.
Communications: radio wave antennas
Antennas
Wave guide type
343840, 343781CA, H01Q 1914
Patent
active
043640524
ABSTRACT:
The present invention relates to an antenna arrangement for suppressing selected sidelobes where the arrangement comprises a main focusing reflector (10), a main feed arrangement (14) and at least two auxiliary feed arrangements (20 and 21) disposed on opposite sides of, and a predetermined equal distance from, the main feed arrangement in the plane of the sidelobes to be suppressed. All feed arrangements radiate the same signal and their individual beams are radiated in a direction whereby the central ray thereof impinge the same point on the main reflector. By proper adjustment of the phase, amplitude and transverse off-axis distance of the auxiliary feed arrangements from the main feed arrangement, the combined E-field distribution of the auxiliary feed arrangements at the edge of the reflector in the plane of the sidelobes to be suppressed will be equal and opposite to the E-field distribution of the main feed arrangement. Additional auxiliary feed arrangements or clusters of auxiliary feed elements may also be employed for far and near sidelobe suppression.
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Bell Telephone Laboratories Incorporated
Moore David K.
Pfeifle Erwin W.
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