组合树枝型三频微带天线的设计研究

在传统单极子天线的基础上,采用三种树枝型枝节的组合,设计出一种工作于S、C、X波段的三频点微带天线。天线的辐射枝节尺寸为23 mm×27 mm,工作于2.5 GHz、4.7 GHz、8.1 GHz三个频段。仿真及实物测试结果表明,天线在2.5 GHz处最小回波损耗为-22.4 d B,带宽435 MHz;在4.7 GHz处最小回波损耗为-26.3 d B,带宽454 MHz;在8.1 GHz处最小回波损耗为-23.3 d B,且实现了7~10.1 GHz的超宽带。该三频微带天线在无线局域网(WLAN)和超高频通信系统中将有较好的应用前景。

Study on a Triple-Band Microstrip Antenna with Combination of Tree Branches

On the basis of traditional monopole antenna, a triple-band microstrip antenna applied to the S,C,X band by using the combination of three kinds of tree branches was designed. The antenna possesses the radiation patch size of 23mm*27mm and works at 2.5GHz,4.7GHz and 8.1GHz respectively.The results of simulation and physical test show that the antenna achieves the minimum return loss at 2.5GHz of -22.4dB,the bandwidth of 435MHz,the minimum return loss at 4.7GHz of -26.3dB,the bandwidth of 454MHz,the minimum return loss at 8.1GHz of -23.3dB,and it can realize the ultra-wide band from 7GHz to 10.1GHz.The triple-band microstrip antenna has a good application prospect in WLAN and high frequency communication system.