All-dielectric tapered waveguide bender with homogeneous loading, arbitrary bending and simplified geometry

Abstract

A universal all-dielectric tapered waveguide bender, characterized by (θ b, m), is proposed, which can bend, taper, and connect multiple different waveguides in series. The loading medium has three features simultaneously: all-dielectric, homogeneous, and isotropic. These advantageous features are also maintained for arbitrary bending angles and mismatching of cross sections. The advanced design also greatly simplifies the geometry, and the advanced bender is found to have only one exposed flat surface. The proposed method and results may find potential applications in all kinds of equal/nonequal waveguide bender for its compactness, high efficiency, material simplicity, and flexibility in fabrication.