基于等效磁表面的层叠型介质谐振器天线

A Stacked Dielectric Resonator Antenna Based on Equivalent Magnetic Surface

提出了一种基于等效磁表面的层叠型介质天线,同时具有宽带和高增益等特点。设计采用两片高介电常数的薄介质片,构造出两个等效磁表面,结合金属地的等效电表面,可以在“电-磁”以及“磁-磁”的边界条件中获得两个独立的TE111^y模式。通过合并这两个模式可以有效拓展天线的工作带宽,同时,等效磁表面的引入还可以提高天线的增益。天线的仿真和测试结果一致性良好,其｜S11｜〈-10 dB的相对带宽约为36%,最大增益在6.3 GHz处达到8.4 dBi。另外,该天线的辐射单元均由低损耗的介质构成,辐射效率高,使其在未来无线通信系统中具备一定的应用前景。

A stacked dielectric antenna based on equivalent magnetic surface with wide bandwidth and high gain is proposed in this paper. In this design, two resonant TE 111 modes, one located between the ground plane and high permittivity ceramic sheet, and the other formed between the two high permittivity ceramic sheets, can be simultaneously excited and thereby constitute a wide bandwidth and high gain. Measured results are in good agreement with the simulated results, which show that the antenna achieves an impedance bandwidth of about 36% （ IS11 I≤ -10 dB）, with a peak gain of 8.4 dBi at 6.3 GHz. The radiation element of the antenna is made of low loss dielectric material, thus having high radiation efficiency, making it a suitable candidate for future wireless communication systems.