Decade-bandwidth low cross-polarization UWB array

J. Logan, M. Vouvakis
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引用次数: 4

Abstract

The proposed Sliced Notch Antenna (SNA) array fixes the longstanding problem of high cross-polarization radiation in Vivaldi arrays while maintaining their excellent wideband wide-scan impedance performance with a simple reconfiguration of the Vivaldi fins. The enabling technical innovation is the introduction of discontinuities at the upper region of the flared fins that control the ratio of vertical-to-horizontal current density, without introducing sizable reflections. Measurements and simulations suggest a 10:1 (1.2-12 GHz) SNA array operation with good scanning VSWR out to 45°, and about 15 dB polarization purity improvement over a well-designed Vivaldi counterpart.
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十频宽低交叉极化超宽带阵列
本文提出的SNA阵列解决了维瓦尔第阵列长期存在的高交叉极化辐射问题,同时通过对维瓦尔第鳍的简单重构,保持了维瓦尔第阵列良好的宽带宽扫描阻抗性能。这项技术的创新之处在于,在喇叭形鳍片的上部区域引入了不连续结构,从而控制了垂直与水平电流密度的比例,同时又不会产生相当大的反射。测量和模拟表明,10:1 (1.2-12 GHz) SNA阵列工作,在45°范围内具有良好的扫描VSWR,并且与精心设计的Vivaldi对应器件相比,极化纯度提高了约15 dB。
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