Optimized Ultrawideband and Uniplanar Minkowski Fractal Branch Line Coupler

الملخص EN

The non-Euclidean Minkowski fractal geometry is used in design, optimization, and fabrication of an ultrawideband (UWB) branch line coupler.

Self-similarities of the fractal geometries make them act like an infinite length in a finite area.

This property creates a smaller design with broader bandwidth.

The designed 3 dB microstrip coupler has a single layer and uniplanar platform with quite easy fabrication process.

This optimized 180° coupler also shows a perfect isolation and insertion loss over the UWB frequency range of 3.1–10.6 GHz.