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Accession Number:
AD1182420
Title:
Modal Beamformers Using Passive Butler Matrices
Descriptive Note:
[Technical Report, Memorandum Report]
Corporate Author:
NAVAL RESEARCH LAB WASHINGTON DC
Report Date:
2022-10-12
Pagination or Media Count:
35
Abstract:
Antennas that have elements placed in a circular fashion require complex beamforming strategies as each element has a different pointing direction and thus the overall radiation pattern cannot be simplified as for planar arrays. However by transforming the circular elements into phase modes using a passive Butler matrix we can create elements that now behave similar to elements in a planar array. In this report we present the final hardware designs for the 4 X 4 and 8 X 8 Butler matrices. We also demonstrate the formation of phase modes from passive beamformers and show the formation of directional beams as well as beams with nulls.
Distribution Statement:
[A, Approved For Public Release]