超宽带天线的一种设计方法

Method of UWB antenna design

根据电磁场理论提出了一种用于无线通信的微带贴片天线设计方法.根据天线的工作频带,对天线进行结构设计及辐射结构的等效电路分析.为了验证该天线结构参数的有效性,对该天线进行有限元仿真、相关结构参数优化,以达到带宽和辐射最优的目的.经实际制作和测试,结果表明,该天线的阻抗带宽(10dB回波损耗)可达10GHz(2.0~12.0GHz),倍频带宽高达6,其带宽是十字交叉单极子天线带宽的3倍之多.此外,该天线在工作频率内具有良好的全向辐射特性和增益水平,天线结构简单,性能稳定,实用性强.

According to the theory of electromagnetic field, this paper presents a design method of a microstrip patch antenna for wireless communication. According to the working frequency band of the antenna, the antenna structure is designed and the equivalent circuit is analyzed. In order to verify the effectiveness of the antenna structure parameters, finite element simulation, the antenna structure parameters optimization to achieve an optimal bandwidth and radiation to the actual production and test results show that the impedance bandwidth of the antenna （10dB return loss） is up to 10GHz （2.0- 12.0 GHz）, and that the absolute bandwidth of the multiplier is up to 6, the bandwidth being three times the cross bandwidth of the monopole antenna. In addition, the antenna has a good omnidirectional radiation characteristics and gain level in the operating frequency, and the antenna has a simple structure, a stable performance and good practicability.