一种频相扫阵列天线研究

摘要

An antenna with frequency-phase scanning array is studied.This array antenna is composed of a fed net with an air stripline structure and a wide-band unit antenna, and it can realize the frequency scanning characteristic in one dimension and the phase scanning characteristic in the other dimension.Through simulation and optimization, the related size is confirmed, and the antenna is manufactured and tested.The test result indicates that: the loss of the fed net with air strip line structure is relative small;the relative bandwidth of this antenna reaches 14.7% (wide-band antenna in the radar field);the scanning angle is bigger than 60°;and in the range of the whole band, the side lobe lever is better than-18.5 dB.%研究了一种频相扫体制的阵列天线.天线采用空气带状线结构的馈电网络,结合宽带单元天线,实现了该阵列天线在一维上频扫、另一维相扫的特性.通过仿真、优化确定各部分尺寸,并对其进行了实物加工和测试,测试结果表明:1)空气带状线馈电网络的损耗相对较小,平均为2.5 dB;2)该阵列天线的相对带宽达到14.7%(在雷达领域属于宽带天线阵列),其二维扫描角度均大于60°,在全带宽范围内,副瓣电平优于-18.5 dB,实现了一种频相扫体制的阵列天线.