基于 CMA 的偶数模式组合方法的谐振分析和增益估计用于柔性宽带天线。

Resonance Analysis and Gain Estimation Using CMA-Based Even Mode Combination Method for Flexible Wideband Antennas.

机构信息

Department of Communications Technology Engineering, College of Information Technology, Imam Ja'afar Al-Sadiq University, Baghdad 10052, Iraq.

Centre for Wireless Communications (CWC), University of Oulu, P.O. Box 4500, 90014 Oulu, Finland.

出版信息

Sensors (Basel). 2023 Jun 2;23(11):5297. doi: 10.3390/s23115297.

DOI:10.3390/s23115297

PMID:37300024

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10256038/

Abstract

This work presents an efficient design and optimization method based on characteristic mode analysis (CMA) to predict the resonance and gain of wideband antennas made from flexible materials. Known as the even mode combination (EMC) method based on CMA, the forward gain is estimated based on the principle of summing the electric field magnitudes of the first even dominant modes of the antenna. To demonstrate its effectiveness, two compact, flexible planar monopole antennas designed on different materials and two different feeding methods are presented and analyzed. The first planar monopole is designed on Kapton polyimide substrate and fed using a coplanar waveguide to operate from 2 to 5.27 GHz (measured). On the other hand, the second antenna is designed on felt textile and fed using a microstrip line to operate from about 2.99 to 5.57 GHz (measured). Their frequencies are selected to ensure their relevance in operating across several important wireless frequency bands, such as 2.45 GHz, 3.6 GHz, 5.5 GHz, and 5.8 GHz. On the other hand, these antennas are also designed to enable competitive bandwidth and compactness relative to the recent literature. Comparison of the optimized gains and other performance parameters of both structures are in agreement with the optimized results from full wave simulations, which process is less resource-efficient and more iterative.

摘要

这项工作提出了一种基于特征模式分析（CMA）的高效设计和优化方法，用于预测由柔性材料制成的宽带天线的共振和增益。这种方法被称为基于 CMA 的偶模组合（EMC）方法，其正向增益是基于天线的第一个偶模主导模式的电场幅度之和的原理来估计的。为了证明其有效性，提出并分析了两个设计在不同材料和两种不同馈电方式上的紧凑、灵活的平面单极天线。第一个平面单极天线设计在 Kapton 聚酰亚胺基板上，使用共面波导馈电，工作频率为 2 至 5.27 GHz（测量）。另一方面，第二个天线设计在毛毡纺织物上，使用微带线馈电，工作频率约为 2.99 至 5.57 GHz（测量）。选择它们的频率是为了确保它们在多个重要无线频段（如 2.45 GHz、3.6 GHz、5.5 GHz 和 5.8 GHz）中具有相关性。另一方面，这些天线的设计也使得它们相对于最近的文献具有竞争力的带宽和紧凑性。两种结构的优化增益和其他性能参数的比较与全波仿真的优化结果一致，全波仿真的过程效率较低且迭代较多。