基于玻璃纤维环氧树脂的双陷波宽频微带天线设计

Design of a dual band-notched broadband microstrip antenna based on glass fiber epoxy resin

摘要:

本文设计了一种新型的宽频微带天线,天线基本结构为回字形,在两个正方环主辐射贴片之间通过四个长方形辐射贴片进行连接。天线基板材质选用玻璃纤维环氧树脂复合材料,大小为30mm′45mm,厚度为1.6mm。天线结构采用电路板印制工艺进行图形化,参考地印制于基板背部。借助Ansoft HFSS 13.0进行仿真,在1~8GHz范围内进行扫频,可用频段为2.1GHz~4.3GHz,相对带宽为68%。文中给出了天线反射系数S11、电压驻波比VSWR、输入阻抗和增益方向图的仿真结果,分析了结构参数对天线辐射性能的影响,并通过实际测量与仿真进行对比,结果基本一致。所设计天线可用于无线局域网WLAN、蓝牙、ZigBee、WiMAX (3.4~3.69GHz)等,具有一定的参考意义。

Abstract:

A novel broadband microstrip antenna is presented. Its shape is similar to Chinese character ‘回’. The proposed antenna structure mainly consists of two square rings. Between the square rings, four rectangle radiation patchs are printed to connect them. The material of the substrate is glass fiber epoxy resin. The thickness of the substrate is 1.6mm and area is 30mm′45mm. Printed circuit board technology is adopted to form the antenna structure and reference ground is printed on the back of the substrate. Sweeping frequency from 1GHz to 8GHz, it can cover 2.1GHz~4.3GHz by Ansoft HFSS 13.0. Relative bandwidth is 68%. The simulation results of reflection coefficient S11, voltage standing wave ratio VSWR, input impedance and gain pattern are given in this paper as well as the influence of structural parameter on radiation performance has been analyzed. Compared with the simulation results, the actual measurement results are basically consistent. The designed antenna can be used in wireless local area network, bluetooth, ZigBee, WiMAX (3.4 ~3.69 GHz), etc. It has a certain reference value.