Low-loss reconfigurable artificial surface plasmon transmission line

The invention provides a low-loss reconfigurable artificial surface plasmon transmission line. The low-loss reconfigurable artificial surface plasmon transmission line comprises a dielectric substrate and a metal structure on the dielectric substrate. The metal structure is composed of first metal units which are periodically arranged; the first metal unit comprises a rectangular metal part with a certain width, a zigzag metal part and two variable capacitance diodes, the rectangular metal part and the zigzag metal part are vertically placed, and the variable capacitance diodes are connected with the two metal parts in parallel; the zigzag metal structure is in a wrinkle shape, and the protruding part is triangular. The low-loss reconfigurable artificial surface plasmon transmission line provided by the invention can realize obvious loss reduction, realizes continuous amplitude modulation from-1dB to-40dB in a Ku wave band, realizes continuous phase modulation exceeding 160 degrees in an X wave band, and is e