A novel stealth design method for X-band Vivaldi antenna arrays is proposed in this paper by ladder arrangement along radiation\r\ndirection. Two-element array, eight-element array, and 3 Ã?â?? 7-element array are investigated in this paper. S parameters, RCSs,\r\nand radiation patterns are studied, respectively. According to the ladder arrangement of Vivaldi antennas presented, 16.3 dBsm\r\nmaximal RCS reduction is achieved with satisfied radiation performance. As simulated and measured, results demonstrate that the\r\neffectiveness of the presented low RCS design method is validated.
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