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文章提出了一款具有宽阻抗带宽、低剖面特性的平面天线。天线结构为一副磁偶极子和一副电偶极子的组合,采用探针馈电,并且与表面印刷的T字形条带相连。通过耦合馈电的方式同时激励磁偶极子和电偶极子,天线带宽得到展宽,并且具有低交叉极化,低后向辐射,方向图对称和增益平稳的优点。测试结果表明,设计的天线阻抗带宽(∣S11∣<-10dB)达到51.3%,增益在阻抗带宽范围内大于5.56dBi,最高增益为7.72dBi,增益带宽达到31.25%。该天线的宽带特性使其在Ku波段的无线通信中具有很好的应用前景。
The paper presents a planar antenna with wide impedance bandwidth and low profile. The antenna structure is a combination of a pair of magnetic dipoles and a pair of electric dipoles, fed by a probe and connected to a T-shaped strip of surface printing. By coupling the power supply to both the magnetic dipole and the electric dipole, the antenna bandwidth is broadened and has the advantages of low cross-polarization, low backward radiation, symmetric pattern and stable gain. The experimental results show that the designed antenna impedance bandwidth (| S11 | <-10dB) reaches 51.3%, the gain is greater than 5.56dBi in the impedance bandwidth, the highest gain is 7.72dBi and the gain bandwidth is 31.25%. The broadband characteristics of this antenna make it have a good application prospect in the Ku-band wireless communication.