[微波技术]DRA（dielectric resonator antenna）介质谐振器天线

最近在找一些关于DRA的资料，发现一篇介绍比较全面的文章，将DRA的特性介绍的比较明确，因此本人给翻译了一下，欢迎大家指正！ ]6#bp,  
X+dLk(jI`u  
If the dielectric resonator is placed in an open environment, power is lost in the radiated fields. This fact makes dielectric resonators useful as antenna elements. Dielectric resonator antennas (DRA) offer following attractive features: '~{bq'7`m  
The dimension of a DRA is of the order of , where λ0; is the free-space wavelength and εr is the dielectric constant of the resonator material. Thus, by choosing a high value of εr ( ), the size of the DRA can be significantly reduced. V'alzw7#  
There is no inherent conductor loss in dielectric resonators. This leads to high radiation efficiency of the antenna. This feature is especially attractive for millimeter (mm)-wave antennas, where the loss in metal fabricated antennas can be high. J
B[n]|  
DRAs offer simple coupling schemes to nearly all transmission lines used at microwave and mm-wave frequencies. This makes them suitable for integration into different planar technologies. The coupling between a DRA and the planar transmission line can be easily controlled by varying the position of the DRA with respect to the line. The performance of DRA can therefore be easily optimized experimentally. dX^ ^ @7  
The operating bandwidth of a DRA can be varied over a wide range by suitably choosing resonator parameters. For example, the bandwidth of the lower order modes of a DRA can be easily varied from a fraction of a percent to about 10% or more by the suitable choice of the dielectric constant of the resonator material. I5Vp%mCY  
Each mode of a DRA has a unique internal and associated external field distribution. Therefore, different radiation characteristics can be obtained by exciting different modes of a DRA. 8725ET t  
dPvRbwH<  
以下是本人翻译的，欢迎大家提出问题： /z
V&ebN]  
如果介质谐振器放在开放环境中，能量在辐射场中损失，这一现象使得介质谐振器作为天线元是有用的。介质谐振器天线（DRA）具有以下几个特征：
#$-{hg{  
DRA的尺寸满足 的要求，这里 是自由空间的波长， 是谐振器材料的介电常数，因此通过选择一个大的 （ 10~100），可以将DRA的尺寸明显减小。 *5T^wZpj)  
在介质谐振器内部没有电损耗，这使得天线具有高的辐射效率，这个特点对mm波天线是非常有用的，因为金属制成的mm波天线损耗可能会高。 :k&R]bc9  
介质谐振器天线跟微波波段和mm波波段几乎所有的传输线提供耦合方式，这使得它可以跟不同的平板天线结合。介质谐振器天线和平板传输线之间的耦合可以通过调整DRA和线之间的相对位置得到，因此DRA的性能可以通过实验轻松的得到提高。 &pCa{p  
通过选择合适的谐振器参数，DRA的带 .. jAXKp b  
-9)H[}.  

未注册仅能浏览部分内容，查看全部内容及附件请先 登录 或 注册

原文就这么点啊？ v=8sj{g3,3  
贴出来大家一起看看

希望能 看到完全版的