Leaky Wave Antenna Based on Periodically Truncated SSPP Waveguide

摘要： The guided waveguide structures based on surface plasmons can be used to miniaturize microwave devices. By simply introducing a series of periodic truncation slits in the SSPP (spoof surface plasmon polariton) waveguide, three frequency regions, namely radiating spatial wave region, guiding SSPP mode region, and the cut-off region, are formed. In the frequency region of radiation, the SSPP mode can be transitioned to spatial wave. Consequently, double-port leaky wave antenna based on SSPP waveguide is realized with beam sweep function. Furthermore, a single-port antenna is demonstrated by symmetrical halving of the dual-port antenna. The half-sized single-port antenna exhibits beam steering capability and improved directivity. The proposed SSPP leakage antenna can be applied to the fifth-generation (5G) mobile communication systems.