ABSTRACT

This communication presents the design of an asymmetrical hexagonal-shaped wideband antenna based on Characteristic Mode Analysis (CMA). An L-shaped slot is used to change the distribution of mode surface currents. Current modes and characteristic fields of the desired modes are studied to improve bandwidth. A simple 50 Ω microstrip line is used to excite the selected modes and obtain wideband impedance matching. The antenna is printed on a low-cost FR4 substrate with a size of 30 mm × 29 mm × 1.6 mm. The design approach is experimentally validated through fabricated prototype antenna. It exhibits impedance bandwidth of 110.22% from 2.7 to 9.33 GHz, and thus covers most wireless systems, such as WPAN, WiMax, WLAN, RFID and C-band.

摘要

本次通信介绍了基于特征模式分析 (CMA) 的非对称六边形宽带天线的设计。L形槽用于改变模式表面电流的分布。研究当前模式和所需模式的特征场以提高带宽。一条简单的 50 Ω 微带线用于激发选定的模式并获得宽带阻抗匹配。天线印刷在低成本的 FR4 基板上，尺寸为 30 mm × 29 mm × 1.6 mm。该设计方法通过制造的原型天线进行了实验验证。它在 2.7 至 9.33 GHz 范围内表现出 110.22% 的阻抗带宽，因此涵盖了大多数无线系统，例如 WPAN、WiMax、WLAN、RFID 和 C 波段。