人工磁介质加载改善微带天线阻抗带宽特性的研究
On Artificial Magneto-Dielectric Loading for Improving the Impedance Bandwidth Properties of Microstrip Antennas
摘要：
本文讨论了人工磁介质基片对微带天线阻抗带宽特性的影响。结果发现在文献中的天线小型化使用磁性或磁介电基板进行了修订，并讨论了实际可实现的人工磁介质在微波政权。使用传输线模型，我们，第一，再现已知的结果与非色散材料填充的天线小型化。接下来，一个现实的色散行为的实际可实现的人工基板被嵌入到模型中，我们表明，基板的频率色散在加载天线的阻抗带宽特性中起着非常重要的作用。比较了色散磁介质基片和高介电常数基片加载的小尺寸贴片天线的阻抗带宽。它示出，不同于基板与分散的自由磁导率，实际上可实现的人工基板与分散的磁导率在天线小型化是不利的。这一结论得到了实验验证。
英文摘要：
In the present paper we discuss the effect of artificial magneto-dielectric substrates on the impedance bandwidth properties of microstrip antennas. The results found in the literature for antenna miniaturization using magnetic or magneto-dielectric substrates are revised, and discussion is addressed to the practically realizable artificial magnetic media operating in the microwave regime. Using a transmission-line model we, first, reproduce the known results for antenna miniaturization with non-dispersive material fillings. Next, a realistic dispersive behavior of a practically realizable artificial substrate is embedded into the model, and we show that frequency dispersion of the substrate plays a very important role in the impedance bandwidth characteristics of the loaded antenna. The impedance bandwidths of reduced size patch antennas loaded with dispersive magneto-dielectric substrates and high-permittivity substrates are compared. It is shown that unlike substrates with dispersion-free permeability, practically realizable artificial substrates with dispersive magnetic permeability are not advantageous in antenna miniaturization. This conclusion is experimentally validated.
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