大型多结构面雷达电磁干扰抑制方法研究

Research on EMI Suppression Method of Large Multi-array Radar

在同一个建筑载体的多个结构面上装备天线阵面,大型固定站雷达采用这类布局探测更广空域,但这类布局会导致相邻雷达阵面之间收发串扰,造成接收机前端饱和,影响雷达的工作效率和检测概率。对此,文中在结构面的关键区域铺设铁氧体吸波材料,利用吸波材料的磁滞损耗W_(h)和自然共振损耗W_(c)来吸收衰减电磁波、抑制阵面之间的爬行波干扰;同时在结构面间设置隔离平台,进一步增加隔离度I,使干扰强度降至接收机的动态范围内。这些方法增强了固定站雷达的电磁兼容性,实现了多阵面收发分时工作,大大提高了雷达的搜索探测范围。

In order to achieve the detection of broader airspace, large-scale fixed station radar tends to array in multiple structural plane of the same building, which will certainly cause transceiver crosstalk between adjacent radar, resulting in receiver saturation. This will affect the efficiency and detection probability of radar. By coating absorbing material in key area of the structural planes, the interference intensity can be attenuated to the dynamic range of the receiver as the hysteresis loss and natural resonance loss can help suppress creeping wave interference. Setting isolation retaining walls between structural planes will further increase the degree of isolation and reduce the interference intensity to the dynamic range of the receiver. Thus, the EMC of the radar can be enhanced, which makes possible multi-array transceiver time-sharing work and greatly improves the detection range of radar.