11 January 2007 A broadband 8-18GHz 4-input 4-output Butler matrix
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Abstract
Butler matrices can be used in antenna beam-forming networks to provide a linear phase distribution across the elements of an array. The development of an 8 to 18GHz micro-strip implementation of a 4-input 4-ouput Butler matrix is described. The designed Butler matrix uses March hybrids, Schiffman phase shifters and wire-bond crossovers integrated on a single 60mm x 70mm alumina substrate.
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Leigh Milner, Michael Parker, "A broadband 8-18GHz 4-input 4-output Butler matrix", Proc. SPIE 6414, Smart Structures, Devices, and Systems III, 641406 (11 January 2007); doi: 10.1117/12.695633; https://doi.org/10.1117/12.695633
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KEYWORDS
Phase shifts

Hybrid circuits

Phase measurement

Phased arrays

Scattering

Antennas

Matrices

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