ABSTRACT This paper proposes a design of a spiral antenna using a Vivaldi-shaped balun for broadband matching characteristic with high tolerance to fabrication error and low geometrical complexity. The proposed antenna consists of spiral arms, a Vivaldi-shaped balun, and a ground with a cavity-backed structure. The Vivaldi-shaped balun is connected to the spiral two arms to obtain broad matching characteristics, and the cavity-backed structure is employed to achieve a high directivity. To verify proposed antenna performance, such as reflection coefficients, bore-sight gains, and radiation patterns, the antenna is measured in a full anechoic chamber. The results confirm that the proposed antenna is suitable for broadband spiral antennas with high tolerance to fabrication error and low design complexity.

中文翻译：

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使用维瓦尔第型巴伦设计螺旋天线

摘要 本文提出了一种螺旋天线的设计，该天线使用 Vivaldi 形状的巴伦具有宽带匹配特性，具有高制造误差容限和低几何复杂性。拟议的天线由螺旋臂、维瓦尔第形状的巴伦和具有背腔结构的地面组成。Vivaldi形巴伦与螺旋形两臂连接以获得宽匹配特性，并采用背腔结构实现高指向性。为了验证建议的天线性能，例如反射系数、视轴增益和辐射方向图，在全消声室中测量天线。结果证实，所提出的天线适用于具有高制造误差容忍度和低设计复杂性的宽带螺旋天线。