一种变螺距宽波束双臂螺旋天线
首发时间:2012-06-15
摘要:本文提出了一种分段的变螺距的宽波束双臂螺旋天线。该天线采用两段不同螺距的旋臂组合而成,通过大量的仿真计算,对天线的方向图、增益、轴比特性等技术指标进行了详细的数据分析,确定了一组工作特性优异的物理参数。该天线上半球面波束均匀,3dB增益波束宽度达到159.1度,在此波束宽度范围内,3dB轴比波束宽度大于130度,6dB轴比波束宽度大于180度。
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A Multi-Step Wide Beamwidth Bifilar Helical Antenna
Abstract:In this paper a multi-step wide beamwidth bifilar helical antenna is proposed. This antenna is composed of the spiral bifilar arms of two different pitch. The antenna's radiation patterns, gain and axial ratio(AR),are numerically studied by using computer simulations, and a set of physical parameters provided excellent performance is identified. Providing near uniform pattern coverage over the entire upper hemisphere,the antenna exhibits wide beamwidth with 159.1 3-dB gain beamwidth, wider than 130 3-dB AR beamwidth and 180 6-dB AR beamwidth.
Keywords: Helical Antenna Beamwidth Gain Axial Ratio
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