Spoof Surface Plasmon Polariton and Its Applications to Microwave Frequencies

Spoof Surface Plasmon Polariton (SSPP), which possesses extraordinary ability of sub-wavelength- scaled field confinement, can be realized by an ultrathin corrugated metallic strip at microwave frequencies. Advantages of SSPP such as the high confinement, low loss, and controllable dispersion properties are analyzed in this paper. SSPP waveguide, a novel high-performance transmission line, is studied for its great potentials in modern integrated circuits. A series of reported applications for microwave circuits/devices are reviewed. In the end, future development of this technique is discussed.