宽带微带- cpw馈电圆极化天线

2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2016-09-01 DOI:10.1109/ICEAA.2016.7731470

Hu Liu, Y. Liu, S. Gong, T. Wan

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引用次数: 1

摘要

提出了一种基于微带- cpw馈电矩形槽天线的小尺寸宽带圆极化天线。采用Wilkinson功率分配器和90°相位差比较器组合的宽带功率分配器，产生了4条CPW馈线的均匀模式，提供了相等的幅值，但相位正交。圆极化可以在很宽的频带内产生。在天线结构中增加了反射器以提高天线增益。|S11|<;-10dB时的实测阻抗带宽为74.4%，3db轴比(AR)带宽为70.8%。测量到的3db增益带宽为53.65%，峰值增益为7.4dBic。

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A broadband microstrip-CPW fed circular-polarized antenna

A broadband circularly polarized antenna with a compact size is proposed based on a microstrip-to-CPW fed rectangular slot antenna. With the designed wideband power divider (PD) combined by a Wilkinson power divider and a 90° phase difference comparator, the even modes of four CPW feed lines are generated to provide equal amplitudes but in phase quadrature. Circular polarizations can be generated in a very broad frequency band. A reflector is added to the antenna structure to improve the antenna gains. The measured impedance bandwidth for |S11|<;-10dB is 74.4% and a broad 3-dB axial ratio (AR) bandwidth of 70.8% is also obtained. The measured 3-dB gain bandwidth is 53.65% with the peak gain of 7.4dBic.

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2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)

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