A novel butterfly shape defected ground structure for microstrip line was proposed. Its band gap characteristics and slow wave characteristics were discussed. Including the transmission loss, equivalent circuit modeling for the proposed microstrip line was built and its parameters were extracted. The effects of DGS dimensions on stop band characteristics were presented. Furthermore, a compact DGS low pass filter was designed and measured. The validity of the DGS filter is verified by the agreement between simulated and measured results.
LIU Hai Wen, LI Zheng Fan, SUN Xiao Wei CHENG Zhi Qun, QIAN Rong, ZHANG Dan . NOVEL BUTTERFLY SHAPE DEFECTED GROUND STRUCTURE FOR MICROSTRIPLINE[J]. Journal of Infrared and Millimeter Waves,2004,23(6):431~435Copy