Phased array antenna arrangement with filtering to reduce gratin

Details Phased array antenna arrangement with filtering to reduce gratin Phased array antenna arrangement with filtering to reduce gratin

1979-10-24

1981-03-31

Moore, David K.

Communications: radio wave antennas

Antennas

Antenna components

343753, H01Q 1502

Patent

active

042596742

ABSTRACT:
The present invention relates to a method for reducing the grating lobes associated with phased array antenna arrangements. The present invention, which may be employed with any phased array antenna arrangement, consists of disposing a filtering means capable of blocking the grating lobes at any real focal point in the focal plane of the antenna arrangement. The size of the central region of the filter is determined by the desired field of view at the far-field, and may be adjusted so as to reduce the grating lobes to an admissible level with minimal gain degradation of the main beam.

REFERENCES:
patent: 3797020 (1974-03-01), Roger et al.
patent: 3877031 (1975-04-01), Mailloux et al.
patent: 4021812 (1977-05-01), Schell et al.
patent: 4169268 (1979-09-01), Schell et al.
Mueller, M. R. et al., "Apodization Filtering Applied to a Bandlimited Optical Fourier Transform", Applied Optics, vol. 15, No. 3, 3/76, pp. 690-695.
Agrawal, V., "Grating Lobe Suppression in Phased Arrays by Subarray Rotation", Proceedings of the IEEE, vol. 66, No. 3, 3/78, p. 347.

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