A modified Butler matrix for tapered excitation of scanned arrays

We present a modified Butler matrix that allows the excitation distribution of an array to be tapered. The output section of the matrix is replaced by a network of branch-line hybrids, some of them unbalanced, to modify the power distribution in the output lines. This technique allows flexibility in...

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Bibliographic Details
Main Authors: Fragola, A., Orefice, M., Pirola, M.
Format: Conference Proceeding
Language:English
Subjects:
Antenna arrays
Antenna feeds
Butler matrix
Circuits
Optical coupling
Phase shifters
Phased arrays
Power distribution
Signal generators
Transmission line matrix methods
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Description
Summary:We present a modified Butler matrix that allows the excitation distribution of an array to be tapered. The output section of the matrix is replaced by a network of branch-line hybrids, some of them unbalanced, to modify the power distribution in the output lines. This technique allows flexibility in the choice of the excitation coefficient and eliminates some of the drawbacks of conventional solutions.
DOI:10.1109/APS.2001.959582