Sidelobe reduction in linear antenna arrays with corporate-feeds of non-uniform power distribution
Sidelobe reduction in linear antenna arrays with corporate-feeds of non-uniform power distribution
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DOI：
10.23919/eucap.2017.7928131
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发表时间：
2017-03
期刊：
影响因子：
--
通讯作者：
S. Ogurtsov;S. Koziel
中科院分区：
文献类型：
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作者：
S. Ogurtsov;S. Koziel
提出了一种利用非均匀激励的共同馈源系统地减小宽边线性天线阵列旁瓣的方法。仅考虑由等功率分路t型结点组成的公司馈电，即最简单的功率分路器。首先，对于给定的阵列孔径，在可能激活孔径的激励集中搜索候选馈源（激励集）。搜索是在所有可实现的激励执行使用阵列因素和激励幅度的模型由于功率分布在馈电。在第二阶段，提供减少旁瓣和简单路由的激励被实现为微带公司馈电。最后，利用数值优化和高保真度描述的离散电磁仿真对整个天线馈电电路进行了调谐和验证。我们的方法提供了线性天线阵列设计的灵活性，而不会引入额外的硬件复杂性。一个十二元微带阵列馈电电路的案例研究解释并演示了我们的方法。
A systematic approach to sidelobe reduction of broadside linear antenna arrays using corporate feeds implementing non-uniform excitation is proposed. Only the corporate feeds that consist of equal-power split T-junctions, i.e., the simplest power dividers, are considered. First, for a given particular array aperture, candidate feeds (excitation sets) are searched among excitation sets which might energize the aperture. The search is performed over all realizable excitations using the array factor and the model of excitation amplitudes due to power distribution within the feed. At the second stage, an excitation that provides reduced sidelobes and simple routing is implemented as a microstrip corporate feed. Finally, the entire antenna-feed circuit is tuned and validated using numerical optimization and discrete electromagnetic simulations at the high-fidelity level of description. Our approach offers flexibility in design of linear antenna arrays without introducing extra hardware complications. A case study of a twelve-element microstrip array-feed circuit explains and demonstrates our approach.