3D Printed Wideband Coaxial Wilkinson Divider

This paper combines 3D printing technology (3DPT) with microwave components to obtain better performance than traditional fabrication. Here presents a single-layer and a multi-layer coaxial wideband Wilkinson power divider working at 1 GHz with a third-octave bandwidth. The size of the single-layer structure is
$75 \times 88\times 15\ \text{mm}^{3}$
as a reference. Then, the multi-layer one is introduced to achieve miniaturized characteristic under folding topology, whose size is
$45\times 76\times 23\ \text{mm}^{3}$
. The isolations between the outputs are better than 20 dB and the insertion loss of each port is around 0.2 dB over the operating band. The performance hardly deteriorates with almost half size reduction via 3DPT.