改进的圆形单极子超宽带天线

摘要

An improved circular monopole ultra-wideband antenna was proposed. This antenna was designed by cutting the circular patch edge and increasing circle. The thickness of the substrate was 1.6 mm and the substrate material was FR4 with a relative permittivity of 4.4. The antenna was optimized by changing the size of the circular patch. The simulated results demonstrate the bandwidth (S11≤–10 dB) of the antenna is from 3.03 GHz to 11.55 GHz, the relative bandwidth comes to 116.9%, and the size is 30 mm×31 mm. The size of the antenna is decreased and this antenna can be applied to ultra wideband communication system.%为了有效地对圆形单极子超宽带天线进行小型化，在圆形贴片上进行切边和加圆处理，设计了一款尺寸为30 mm×31 mm的改进型圆形单极子天线。该天线印刷在相对介电常数为4.4、厚度为1.6 mm的FR4介质板上，通过改变切边圆和所加圆的尺寸对天线进行优化。实验结果表明，该天线在S11≤–10 dB的工作带宽为3.03~11.55 GHz，相对带宽为116.9%。该天线减小了传统圆形单极子天线的尺寸，可应用于超宽带通信系统中。