Antenna arrangements for suppressing selected sidelobes
AssigneeBell Telephone Laboratories, Incorporated
InventorHotze Miedema
Life of this patent
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Abstract
The present invention relates to wideband antenna arrangements for suppressing selected sidelobes comprising a main antenna (10) comprising a predetermined aperture (l) and two sidelobe suppression means (12, 14, 40, 42) disposed adjacent and on symmetrically opposite sides of the main antenna in the plane of the sidelobes to be suppressed. The distance between the suppression means preferably approximates the width of the aperture of the main antenna and the aperture size of the suppression means controls the sidelobe suppression region at the aperture of the main antenna. The suppression means can comprise two auxiliary antennas or two sections of the main antenna focusing reflector having apertures (l.sub.1) which are smaller than that of the main antenna.
Claims8
An antenna arrangement capable of suppressing selected sidelobes, the antenna arrangement comprising:
- a main antenna (10) comprising a main focusing reflector including a predetermined aperture (l) and a feed arrangement disposed to radiate a first beam of electromagnetic energy when emitted therefrom along a feed axis of the main antenna for reflection by the main focusing reflector toward the aperture thereof with a predetermined amplitude distribution thereacross
- characterized in that
- the antenna arrangement further comprises:
- first and second suppression means (12, 14, 40 and 42) disposed adjacent to and on symmetrically opposite sides of the main focusing reflector in the plane of the sidelobes to be suppressed with a distance therebetween that approximates the width of the aperture of the main focusing reflector, the first and second suppression means being capable of directing second and third beams, respectively, of electromagnetic energy in the direction of the first beam with a radiation pattern which comprises an amplitude and periodicity which corresponds to, and a phase opposite to, the selected sidelobes to be suppressed.
Dependencies are inferred from the claim text.