摘要
利用"电磁缩尺比"法进行了1000 kV级特高压架空送电线塔对米波雷达频段电磁波能量的衰减效应试验,目的是为了评价特高压输电线塔障碍物对雷达的无源干扰影响。试验选择在郊区开阔场地进行,结论表明:特高压输电线塔等地面设施对试验频段内的电磁波的衰减量在一定距离上大部分情况下都超过了3 dB,塔线与发射天线之间的距离在超过一定程度后,衰减量的变化渐趋于平缓。该结论在确定雷达对特高压架空输电线的防护间距时具有借鉴和参考价值。
The＂Electromagnetic Scale- reduced＂ methed is used to analyze the attenuation effects of the electromagnetic wave which is caused by the 1 000 kV UHV overhead transmission lines and towers. The test is carried out in an open area in order to improve the veracity of the data. The results show that the most attenuation values of the received signal are above 3 dB and after the distance between the lines with the towers and the transmission antenna has gone to a definite level, the value would trend to change little. The results are valuable when it comes to define the defence distance of radar to the UHV overhead transmission lines and towers.
出处
《现代电子技术》
2008年第15期146-148,共3页
Modern Electronics Technique
关键词
特高压输电线
雷达
电磁波
衰减
缩尺比
UHV transmission lines
radar
electromagnetic wave
attenuation
scale - reduced
