Abstract: A kind of shorted Sierpinski carpet fractal microstrip antenna is proposed for multi-frequency and wide-band communication. The high frequency structure simulator(HFSS) simulating results indicate that with two metal via holes applied in the antenna, more frequency bands can be obtained. The lowest radiation frequency of the shorted fractal antenna is decreased to almost half of the none-shorted antenna. The relation between the position of the via holes and the radiation frequency band is studied. A real shorted antenna is made. The experiment result matches with the simulating one.