典型雷达装备带内连续波辐射效应试验研究

Experimental study on radiation effect of in-band continuous wave on typical radar equipment

为掌握雷达装备在带内连续波辐射下的效应规律、揭示带内连续波对雷达的干扰作用机理,以某型频率步进雷达为受试对象,采用全电平辐照法对其进行电磁辐射效应试验研究。带内单频点电磁辐射效应试验结果表明,受试雷达在带内连续波辐射能量作用下,出现测距不准、目标回波电平受到压制等效应。测距误差随辐射干扰功率的增加不规则地变化,而目标回波电平随辐射功率的增加而逐渐减小。带内单频连续波辐射敏感度试验结果表明,受试雷达对带内电磁辐射能量非常敏感。在给定试验条件下,最小只需要0.32 V/m(频差为-0.1 GHz时)的辐射场强就能对受试雷达造成有效干扰。辐射频差超过±0.16 GHz后,临界干扰场强开始急剧增加,受试雷达的连续波电磁辐射效应表现出明显的选频特性。

To study the effect regularities of radar equipment under in-band continuous wave radiation and reveal the interference mechanism of in-band continuous wave on radar, a certain step-frequency radar was used as the test object to establish a test platform. We use the full-level irradiation method to carry out experimental research on the interference effect of radar. The in-band single-frequency electromagnetic radiation effect test results show that the radar under test has the effects of inaccurate ranging and suppressed target echo level due to the continuous wave radiation energy in the band. The ranging error radiated interference power varies irregularly, and the target echo level gradually decreases with the increase of the radiated power. The in-band single-frequency continuous wave radiation sensitivity test results show that the radar under test is very sensitive to the in-band electromagnetic radiation energy,and the minimum required radiation field strength of 0.32 V/m(at a frequency difference of -0.1 GHz) is enough for causing effective interference to the equipment under test(EUT). After the radiation frequency difference exceeds± 0.16 GHz, the critical interference field strength starts to increase sharply. The continuous wave electromagnetic radiation effect of the radar under test shows obvious frequency selection characteristics.