Analysis of phase delay characteristics of left handed transmission line for different CSRR geometries

Analysis of phase characteristics of a transmission lines with capacitive stubs loaded with CSRRs of three different geometries (square, circle and triangle) in the ground plane is presented. The phase delays of −270°, −267° and −263° are observed for CSRRs of square, circular and triangular geometries respectively at resonant frequency of 1.75GHz compared with a reference transmission line (0deg) of same length. A length reduction of approximately 75% is achieved for all three CSRR loaded transmission lines when compared with a conventional transmission line.