高隔离度低交叉极化DRA单元设计

Dual-Polarized Dielectric Resonator Antenna with High Isolation and Lower CrossPolarization

摘要: 主要阐述了一种高隔离度低交叉极化双极化介质谐振器天线的设计方法，通过采用Ｕ形和Ｈ形混合缝隙馈电，该天线实测隔离度优于46.8dB，两个极化的实测带宽大于12.5％(V端口S11小于-10dB的实测阻抗带宽是5.36～6.08GHz，相对带宽约为12.8%；而H端口的为5.47～6.2GHz，相对带宽约为12.5%)，交叉极化电平分别低于-21.4 dB 和 -18.1dB。

Abstract: A dualpolarized dielectric resonator antenna (DRA) of simple structure is presented with very high isolation and lower crosspolarization. Its measured isolation reaches 46.8 dB within the impedance bandwidth of larger than 12.5% by using the H/Ushaped slots coupling with multistub feed lines (the frequency range of measured return loss better than -10 dB is from 5.36GHz to 6.08GHz or BW ≌ 12.8% for Vport, and 5.47～6.2GHz or BW ≌ 12.5% for Hport.). The measured cross-polarization level is -21.4 dB and -18.1dB for two ports respectively.