[1] [1] Veselago V G.The Electrodynamics of substances with simultaneously negative values of ε and μ[J].Soviet Physics Uspekhi,1968,10(4):509-514.

[2] [2] Lai A,Caloz C,Itoh T.Composite right/left-handed transmission line metamaterials[J].IEEE Microwave Magazine,2004,9:34-50.

[4] [4] Sanada A,Kimura M,Awai I,et al.A planar zeroth order resonator antenna using left-handed transmission line[J].Eurpmw,conf.,2004:1341-1344.

[5] [5] Lim S,Caloz C,Itoh T.Metamaterial-based electronically controlled transmission line structure as a novel leaky-wave antenna with tunable radiation angle and beamwidth[J].IEEE MTT,2005,53(1):161-172.