3D-Printed Spoof Surface Plasmon Polaritons Transmission Line for Compact System Interconnection in Ka-Band

In this paper, a spoof surface plasmon polaritons (SSPP) transmission line (TL) in Ka-band is proposed and analyzed. The TL is full-metallic and concise, which can be easily deposited on arbitrary metal surfaces using selective laser melting (SLM) 3D-printing. A low-loss waveguide-to-SSPP adaptor is applied to test the SSPP TL. For comparison, a control group TL is fabricated by milling. The SSPP TL supports TM mode wave traveling with a sharp low pass cut-off characteristic. The simulated model shows a transmission loss of 0.005 dB/mm and a roll-off rate of 21556 dB/octave.