Pulse Transmission Performance of Goubau Lines and Spoof Surface Plasmon Polaritons Transmission Lines

Time-domain pulse transmission performance of Goubau lines and Spoof Surface Plasmon Polariton (SSPP) transmission lines (TL) is evaluated with normalized Euclid distance. A planar Goubau line and a typical SSPP TL, under a similar transmission delay of 1.2 ns, are studied with a Gaussian modulated sinusoidal excitation pulse corresponding to frequency range from 7 GHz to 12 GHz. Based on the input and output pulse signals, the pulse transmission characteristics of two TLs are analyzed by using normalized Euclid distance which covers fidelity and amplitude ratio denoting signal distortion and energy changes respectively. The transmitted normalized Euclid distance of Goubau line is 0.287, and the SSPP TL is 0.448, indicating that Goubau line has a better timedomain pulse transmission performance with an improved fidelity of 0.968 for a given delay, while SSPP TL is 0.896 and has a shorter physical length.