A Broadband Transmission Line at mm-Wave Frequency (DC-60GHz) Using Metamaterial Spoof Surface Plasmons

Transmission lines are the basic foundation of any microwave to millimeter-wave integrated circuits. Many efforts have been made to fulfill the demand of the increasingly higher bandwidth and high capacity wireless communication system. This paper reports the design, analysis, and characterization of a broadband and miniaturized transmission line based on the spoof surface plasmonic metamaterial, which operates from DC-60 GHz frequency band. An RT/duroid5880 microwave laminate having a dielectric constant of 2.2 and a height of 254 micrometers has been used to design and fabricate this proposed structure. The size of the whole structure is 20mm $\times 13$mm. Spoof surface plasmon supports highly confined surface modes at the metal-dielectric interface, which offers miniaturized and low-loss RF components with lower cross-talk and mutual coupling as compared to existing conventional planar technology e.g. microstrip. The designed spoof plasmonic structure supports broadband and higher data rates for signal propagation and will pave a path for the development of the next-generation wireless communication system.