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The slot antenna is attractive for use in many applications. These antennas have several useful properties such as wider impedance bandwidth compared with the microstrip patch antennas, and easier integration with solid‐state, MIC, MMIC, and Micro Electro Mechanical Systems (MEMS). In this study, the novel wideband design of a coplanar waveguide fed fractal slot antenna is proposed and experimentally studied. The return loss, impedance matching and radiation pattern parameters of such a structure will be studied and in one case it would be measured. The obtained results show that the impedance bandwidth of the fractal slot antenna can be 52% which almost covers the entire S‐band. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 936–939, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23241