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Circularly polarized printed crank-line array antenna

机译:圆极化印刷曲柄阵列天线

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摘要

Design of two element printed crank-line array is presented as an inverted microstrip line structure. High gain circularly polarized (CP) tilted beam is achieved from this configuration. The antenna consists of crank-line element as a travelling wave radiator and fed with a printed Z-feed with a printed vertical stub termination. A microstrip power divider is employed to feed array elements with equal amplitude and quadrature phase difference to tilt the main beam direction to 410. Power divider and radiating elements both share the common ground. The antenna exhibits an impedance bandwidth of 43% (3.58–5.3 GHz) for a VSWR <2. The axial ratio is 1.8dB at tilted main beam direction and 3dB axial ratio beamwidth is 280 at 4GHz. The measured circularly polarized gain is around 11dB.
机译:两元素印刷曲柄线阵列的设计以倒置的微带线结构呈现。通过这种配置可以实现高增益圆偏振(CP)倾斜光束。天线由曲柄线元件作为行波辐射器组成,并由印刷的Z馈源和印刷的垂直短截线端接来馈电。微带功率分配器用于以相等的振幅和正交相位差馈入阵列元件,以将主光束方向倾斜到41 0 。功率分配器和辐射元件都共享公共接地。对于VSWR <2,该天线的阻抗带宽为43%(3.58–5.3 GHz)。在倾斜的主波束方向上的轴向比率为1.8dB,在4GHz下3dB的轴向比率波束宽度为28 0 。测得的圆极化增益约为11dB。

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