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首页> 外文期刊>Applied Computational Electromagnetics Society journal >Broadband Circularly Polarized Antennas with Improved Gain
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Broadband Circularly Polarized Antennas with Improved Gain

机译：增益提高的宽带圆极化天线

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摘要

A broadband circularly polarized (CP) antenna with improved gain is proposed. The broadband CP antenna consists of two folded off-center-fed dipoles. Due to the two-dipole configuration, the antenna gain is improved by almost 2 dB. It is shown by simulation and experiment that the broadband CP antenna achieves an impedance bandwidth of 52% (1.71-2.89 GHz) for reflection coefficient<-15 dB and an axial ratio (AR) bandwidth of 45% (1.75-2.73 GHz) for AR<3 dB. The average antenna gain is about 10 dBi. A differentially-fed broadband CP antenna is also developed. Simulated and measured results show that the differentially-fed CP antenna fulfills an impedance bandwidth of 60% (1.53-2.83 GHz) for differential reflection coefficient <-15 dB and a 3-dB AR bandwidth of 44% (1.76-2.75 GHz). The average antenna gain is about 10 dBi. The gain-improved broadband CP antennas feature a simple planar configuration, which are suitable for applications in satellite/wireless communications.
机译：提出了一种增益提高的宽带圆极化（CP）天线。宽带CP天线由两个折叠的偏心馈电偶极子组成。由于采用了双偶极子配置，天线增益提高了近2 dB。通过仿真和实验表明，宽带CP天线在反射系数<-15 dB时达到52％（1.71-2.89 GHz）的阻抗带宽，而在1.25 GHz时达到45％（1.75-2.73 GHz）的轴向比率（AR）带宽AR <3 dB。平均天线增益约为10 dBi。还开发了一种差分馈电宽带CP天线。仿真和测量结果表明，对于差分反射系数<-15 dB，差分馈电CP天线可满足60％（1.53-2.83 GHz）的阻抗带宽，而对于44％（1.76-2.75 GHz）的3-dB AR带宽则可满足该要求。平均天线增益约为10 dBi。增益提高的宽带CP天线具有简单的平面配置，适用于卫星/无线通信中的应用。

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