倒L形枝节加载宽带圆极化缝隙天线

基金项目: 福建省产学研重大项目(2015H6014)

Broadband Circularly Polarized Slot Antenna Loaded with an Inverted L-Shaped Strip

摘要: 设计了一种倒L形枝节加载宽带圆极化缝隙天线。天线为单层矩形结构,采用共面波导(CPW)馈电,通过在馈线上端加载倒L形枝节和在环形接地面上加载T 形枝节,实现了天线的宽阻抗带宽和宽轴比带宽特性。实测结果表明,S11 ￡-10 dB 的阻抗带宽达到115%(1.6-5.9 GHz),轴比￡3 dB 的圆极化带宽为48.3% (2.2-3.6 GHz)。该天线结构简单、易于制作,具有较好的应用前景。
- 缝隙天线 /
- 倒L形枝节 /
- 宽带 /
- 圆极化 /
- 共面波导
Abstract: In this paper, a broadband circularly polarized slot antenna loaded with an inverted L-shaped strip is proposed. The antenna is a single-layer rectangular structure, using coplanar waveguide feed. An inverted L-shaped strip is loaded at the upper end of the feed line and a T-shaped strip is introduced on the annular ground to obtain wide impedance bandwidth and wide axial-ratio bandwidth. The measured results demonstrate that the impedance bandwidth for S11 ￡-10 dB reaches 115% (1.6-5.9 GHz) and circular polarization bandwidth for axial-ratio￡3 dB reaches 48.3% (2.2-3.6 GHz). The proposed antenna has a simple structure, is easy to be fabricated and can be widely used.
- slot antenna /
- inverted L-shaped strip /
- broadband /
- circular polarization /
- coplanar waveguide (CPW)