Wen-Ling Chen and Guang-Ming Wang, Missile Institute of Air Force Engineering University, Shaanxi Province, P.R. China; Guo-Dong Chen, Guang-Feng Yao,

Microstrip stepped-impedance low-pass filters using fractal shapes, such as Koch islands and Sierpinski carpets, are proposed for the first time. Conventional stepped-impedance low-pass filters are very popular, due to their ease of implementation in either microstrip or coplanar technology. However, to achieve a low-pass filter with high stopband performance,...