Abstract
Vivaldi antenna becomes a hot topic because of its band width, simple structure, easy processing, light weight and low cost. It is often used in communication system. This paper designed a Vivaldi antenna which can work on L, S, C, X, Ku band together. The proposed antenna has dual-slot conduction and “T” shaped feed structure, which effectively improve the antenna's directivity. And it has the advantage of wide frequency band, low profile and so on. Using CST software simulates and optimizes the antenna. The antenna can realize work on five band. In addition, the slot on the radiating patch can reduce low frequency's cut-off frequency and the impedance matching structure can improve the gain.
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