双频宽带双极化定向电磁偶极子天线设计

    Design of Dual-Wideband Dual-Polarization Directional Magneto-Electric Dipole Antenna

    • 摘要: 设计了一款双频带宽带双极化定向电磁偶极子天线。首先,采用最基本的电磁偶极子天线模型,通过对偶极子天线的形状进行调整以及增加Г形寄生枝节实现了双频段单极化定向电磁偶极子天线。其次,将两个单极化电磁偶极子天线十字交叉放置。最后,通过两个高度不同的Г形探针分别对两个天线进行耦合馈电,实现双频宽带双极化定向辐射特性。根据仿真结果,对天线模型进行了加工和测试。仿真和实测结果表明:天线在低频段0.8~0.96 GHz和高频段1.7~2.7 GHz内反射系数的模值均小于-10 dB,所对应端口隔离度分别大于20 dB和25 dB,天线的测试峰值增益在低频和高频段分别为5.5 dBi和8.2 dBi。该天线可应用在无线通讯系统中。

       

      Abstract: A dual-wideband dual-polarization directional magneto-electric dipole antenna is presented in this paper. Firstly, the traditional magneto-electric dipole antenna model is adjusted and Г-shaped parasitic strips are added to obtain dual-band directional magneto-electric antenna. Secondly, two magneto-electric dipole antennas are placed 90°crossed. Lastly, two Г-shaped feed strips with different height are employed to feed the dual-wideband dual-polarization directional magneto-electric antenna. According the simulated results, the antenna is prototyped and measured. The simulated and measured results show that the antenna obtains -10 dB impedance bandwidths of 18% (0.8~0.96 GHz) and 45% (1.7~2.7 GHz) for the lower and higher bands, respectively. The isolations between the two input ports are larger than 20 dB in the lower frequency band and 25 dB in the higher frequency band. The antenna has peak gains of 5.5 dBi and 8.2 dBi for the lower and higher bands, respectively. The proposed antenna can be widely used in wireless communication systems.

       

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