Xiangxiang Li, Kerong Xu, Yeqiang Li, Suzhen Ye, Jing Tao, Changsheng Wang
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This paper presents a 1×8 SIW fed Vivaldi antenna array with the size of 56mm×46mm, which provides high gain of more than 15 dBi at the mm-wave frequencies from 32.5 GHz to 39.5 GHz. A single SIW-fed Vivaldi element is first proposed, which has a bandwidth of 26.5–40 GHz with an average gain of ~6.5 dBi. This antenna element is then utilized to construct a 1 × 8 linear array matched to a 50Ω impedance by a T-junction SIW power divider. The characteristics of proposed antenna array are thoroughly investigated. The wide bandwidth and high gain along with the excellent performance of the proposed 1 × 8 antenna array makes it an excellent candidate for future mm-wave applications.
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