用于DOA测量的闭合环天线研究

ON CLOSED LOOP ANTENNAS FOR DOA OF ELECTROMAGNETIC WAVE

开发能够直接响应电磁波到达方向的天线元件将可以简化天线阵列结构.采用一定的输出电路使环天线成为一个电单极子环天线,实验表明:该电单极子环天线的输出仅与极化作用有关,并且入射方向是影响该环天线输出的一个独立因素.这一特点使得电单极子环天线可以直接响应电磁波到达方向,这将有助于减少阵列中传感元件的数量,而且传感元件也不必共点放置,从而能减小元件之间的互耦.

Responses of loop antennas to incidence direction and polarization were measured.A monopole loop was made and its responses to incidences direction and polarization direction were measured.Output of monopole loop was only influenced by polarization,whereas incidence direction was an independent variable of its output.This made possible for an array of monopole loops to measure DOA of electromagnetic wave directly with decreased and distributed sensor units in an array.