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Article: A THINNED MULTIBEAM PHASED ARRAY.
- Article from:
- Microwave Journal
- Article date:
- November 1, 1999
- Author:
CopyrightCOPYRIGHT 1999 Horizon House Publications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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A single-aperture four-beam phased-array antenna that integrates four thinned, nonuniform (or density tapered) phased arrays into a 52.4 wavelength diameter aperture is described. Each of the four scanning beams is independently formed by its own set of array elements and power and phase distribution networks. Each beam array's element count is less than 18 percent of a filled array. The resultant four-beam array element count is 68 percent of a filled array with a 1 [degrees] half-power beamwidth (HPBW). The peak sidelobe level of this multibeam phased array (MBPA) is less than -21 dB. This density-tapered MBPA has a directivity of 42.8 dB at boresight, which is slightly ...