Engineering antenna radiation patterns via quasi-conformal mappings
Engineering antenna radiation patterns via quasi-conformal mappings
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DOI：
10.1364/oe.19.023743
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发表时间：
2011-11-21
期刊：
影响因子：
3.8
通讯作者：
Leonhardt, Ulf
中科院分区：
文献类型：
--
作者：
Garcia-Meca, Carlos;Martinez, Alejandro;Leonhardt, Ulf
我们使用共形和准共形映射的组合来设计修改点源的全向辐射图案的各向同性电磁设备。对于TE波，所设计的器件也是非磁性的。所提出的方法提供的灵活性是远远高于实现与保角映射。结果表明，可以实现复杂的辐射图案，其可以将所需数量的任意方向上的高方向性和其他指定角度范围内的各向同性辐射相结合。此外，这种技术使我们能够在一定程度上控制每个方向上的辐射功率。所得结果对光谱的任何部分都是有效的。通过实例说明了该方法的潜力。最后，我们研究了所考虑的设备的频率依赖性，并提出了一个实际的介电实现。(C)2011年美国光学学会
We use a combination of conformal and quasi-conformal mappings to engineer isotropic electromagnetic devices that modify the omnidirectional radiation pattern of a point source. For TE waves, the designed devices are also non-magnetic. The flexibility offered by the proposed method is much higher than that achieved with conformal mappings. As a result, it is shown that complex radiation patterns can be achieved, which can combine high directivity in a desired number of arbitrary directions and isotropic radiation in other specified angular ranges. In addition, this technique enables us to control the power radiated in each direction to a certain extent. The obtained results are valid for any part of the spectrum. The potential of this method is illustrated with some examples. Finally, we study the frequency dependence of the considered devices and propose a practical dielectric implementation. (C) 2011 Optical Society of America