Abstract: The technology of cutting slots in the microstrip patch is used for the radar cross section (RCS) reduction at the cost of radiation performance. A novel cutting slots scheme which combines circular slot with rectangular slot is presented in this paper, it can reduce the RCS of the antenna effectively. Simulation and measured results and analysis demonstrate that this slots antenna can not only guarantee the antenna radiation performance, but also reduce the RCS of the antenna significantly at frequency range from 4 GHz to 8GHz, the largest reduction is up to 22dBsm.