Design of a dual‐polarized omnidirectional antenna for broadband applications
Design of a dual‐polarized omnidirectional antenna for broadband applications
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DOI：
10.1002/mmce.20897
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
A. Dastranj;B. Abbasi Arand
中科院分区：
文献类型：
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作者：
A. Dastranj;B. Abbasi Arand
提出了一种宽带双极化全向天线。该天线由两部分组成，一个非对称双锥天线和一个圆柱形多层极化器。为了在水平面中具有几乎完美的全向辐射图并且在仰角平面中主辐射波束位置在θ=75 °附近，使用非对称双锥天线。此外，为了在2-18 GHz的工作带宽内提供双偏振性能，设计并优化了多层偏振器。通过Ansoft HFSS和CST微波工作室CAD工具进行了大量的仿真，以优化天线的辐射方向图、增益、极化和反射系数。仿真结果表明，该天线的辐射特性对多层极化器的结构和尺寸参数非常敏感。所设计的天线具有很高的机械精度，并进行了测试。计算机模拟和实验结果取得了令人满意的一致性。该天线区别于以往设计的主要特点是能够同时提供具有小波纹、双极化性能和宽带宽的全向辐射方向图。基于这些特性，所提出的天线可以用于宽带通信应用。© 2015 Wiley Periodicals，Inc. Int J RF and Microwave CAE 25：591-600，2015.
A broadband dual‐polarized omnidirectional antenna is presented. The proposed antenna consists of two parts, an asymmetric biconical antenna and a cylindrical multilayer polarizer. To have an almost perfect omnidirectional radiation pattern in the horizontal plane and the main radiating beam position at around θ=75∘ , in the elevation plane, the asymmetric biconical antenna is used. Moreover, to provide dual polarization performance over the 2–18 GHz operational bandwidth, a multilayer polarizer is designed and optimized. Numerous simulations via Ansoft HFSS and CST microwave Studio CAD tools have been made to optimize the radiation pattern, gain, polarization, and the reflection coefficient of the antenna. Simulation results show that the radiation characteristics of the proposed antenna are extremely sensitive to the configuration and dimensional parameters of the multilayer polarizer. The designed antenna was fabricated with high mechanical accuracy and measured. Satisfactory agreement of computer simulations and experimental results was obtained. The main feature that distinguishes this antenna from the previous designs is the ability to provide the omnidirectional radiation pattern with small ripples, dual polarizations performance, and the wide bandwidth simultaneously. Based on these characteristics, the proposed antenna can be useful for broadband communication applications. © 2015 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:591–600, 2015.