一种紧凑型高隔离度的MIMO超宽带天线研究

摘要

提出一种紧凑型高隔离度多输入多输出超宽带天线，该天线由两个共面梯形辐射单元背靠背连接在一起构成，衬底材料的相对介电常数为4.4。在两个辐射单元之间放置高隔离金属条，确保天线具有高隔离度。该天线在整个超宽带频带上电压驻波比VSWR为2：1，隔离度高于20 dB，峰值增益为5.2 dBi，峰值有效率为90%，且包络相关性系数ECC (Envelope Correlation Coefficient)≤0.1641。%A compact high isolation multiple input and output ultra-wideband antenna was proposed. The antenna was made up of two coplanar trapezoid structures of radiating unit back to back together. The relative permittivity of substrate is 4.4. A high isolation metal strip was placed among two rediating units to ensure the antenna having high isolation. The antenna VSWR is 2:1 on the entire UWB frequency band, and the isolation is higher than 20 dB, the peak gain is 5.2 dBi, the peak effective rate is 90%, and the ECC is less than 0.164 1.