基于精确网络模型的CRLH-TL简化设计

Accurate network model to simplify the design of CRLH-TL

提出了一种针对左右手混合传输线(CRLH-TL)的精确网络模型和元胞结构提取方法,简化了多节左右手混合传输线设计方案。以往常规的CRLH-TL网络模型及其元胞提取方法忽略了末节耦合效应(end-couple)和末节空间波效应(space-wave),得到的单节元胞的网络参数无法准确设计多节CRLH-TL结构。提出的精确网络模型基于极少节元胞结构的仿真数据,将单节元胞和末节效应的网络参数分离,获得准确的元胞网络参数,为快速准确地设计多节CRLH-TL结构打下基础。以此模型方法,设计了30节元胞级联的CRLH-TL漏波天线,与CST全波仿真结果进行对比,辐射角和辐射波束宽度的计算误差分别小于1°和2°,验证了精确网络模型的准确性。

An accurate network model and cell structure extraction method for the composite right-left handed transmission line （CRLH-TL） are proposed, which simplifies the design scheme of multi-section CRLH-TL. In the past, the conventional CRLH-TL network model and its cellular extraction method neglected the end-couple and space-wave effects, and the multi-section CRLH- TL structure cannot be designed accurately by the network parameters of the single cell. The precise network model is based on the simulation data of the cell structure, and the network parameters of the single cell and the distal effect are obtained, for the rapid and accurate design of multi-section CRLH-TL structure to lay the foundation. With this model method, the CRLH-TL leaky antenna with 30 unit cells is designed with the exact network model and extraction method. Compared with the CST fullwave simulation results, the calculation error of the radiation angle and the radiation beam width is less than 1° and 2° , which verifies the accuracy of the exact network model.