应用于微多普勒效应雷达的紧凑型宽带端射阵列天线的研究

The Research and Design of Compact Broadband Endfire Array Antenna for Micro-Doppler Effective Radar Application

为解决微多普勒效应雷达的端射、小型化及宽频带问题,提出了一款紧凑型宽带端射阵列天线. 4个T型环缝天线单元中心对称放置于基板的背面,馈电网络位于基板的正面,从而形成耦合馈电,且馈电的幅度相同,馈电的相位在顺时针方向的分布为90°、270°、0°、180°.经加工测试,其测试结果与仿真结果基本一致,且工作频带为5.72～6.71 GHz,绝对带宽为0.99 GHz,满足宽带特性的要求.该天线采用易于集成的小型化平面设计,具有宽频带特性以及良好的端射性能,且加工成本较低,可以满足微多普勒效应雷达的实际应用要求.

In order to solve the problems of endfire, miniaturization and broadband of the micro-Doppler effectiveradar, a compact broadband endfire array antenna is proposed.The four T-slotted antenna elements aresymmetrically placed on the back of the substrate, and the feeding network is located on the front of the substrate,thus forming a coupling feed, which has same amplitude and the distribution of phase in the clockwise direction is90°, 270°, 0°, 180°.After processing and measurement, the measured results are basically consistent with thesimulated results, and the operating frequency band is 5.72~6.71 GHz, which has the absolute bandwidth of0.99 GHz and satisfies the requirement of wideband characteristic.The antenna adopts an easy-to-integrateminiaturized planar design, and has broadband characteristic, good endfire performance, low processing cost, whichcan meet the practical application requirements of the micro-Doppler effective radar.