Assessment of MFE-Based Multiport Waveguide Crossing for Use with Low-Cost, Low-Loss Dielectric Interconnects in Millimeter Wave Arrays

Practical feasibility of multiport waveguide crossings for dielectric waveguides in millimeter-wave arrays is addressed by simulation. An idealized model of a 6-port waveguide crossing which is derived from a two-dimensional Maxwell's Fish-eye lens using concepts from transformation optics is considered as example. Results for the 77 GHz automotive radar band are presented. Conclusions with respect to required device size, dielectric material and acceptable loss factor are drawn.