Novel two-layer broadband 4 × 4 Butler matrix in SIW technology for Ku-band applications

Abstract

In this paper, the design of a broadband 4x4 Butler matrix is presented for the first time on a two-layer Substrate Integrated Waveguide (SIW) structure. The presence of path crossings in the matrix structure often imposes the use of extra OdB couplers - usually obtained using back to back pairs of 3dB couplers - for planar realizations. Specific designs… (More)

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