A new type of composite right/left handed(CRLH) transmission line is proposed by adding a T shaped branch to the traditional complementary single split ring resonator (CSSRR). Through theory analysis, electromagnetic(EM) simulation and circuit simulation, the characterization is studied, the corresponding equivalent circuit model is given and the dispersion curve is derived. Then the CRLH structure with dual band performance is proved.A quadruple band micro strip antenna working in C wave band is designed, fabricated and measured using the new type CRLH structure. Good performance in impendence band width and radiation is verified by the measurement data.