多场景下广播电视C波段下行接收防5G频段干扰测试实践

Anti 5G Band Interference Test Practice of C-band Downlink Reception of Broadcasting and Television in Multiple Scenarios

为验证加装窄带滤波器以防5G频段干扰方案的有效性,在多个不同分布基站的场景下,利用5G实时业务功能,测试卫星接收天线在加装窄带滤波器前后的信号接收质量,判断加装窄带滤波器这一主流方案是否具有实际的抗5G干扰效用。同时,通过设定不同的5G基站发射功率,检测5G业务对卫星下行接收干扰的边界范围。测试结果表明,部分5G频段对卫星C波段下行存在干扰,5G基站的发射功率、5G的不同业务类型以及基站与卫星接收天线的位置关系均会对卫星接收有不同程度的影响,加装窄带滤波器可显著降低5G频段对卫星下行接收的干扰程度。

In order to verify the effectiveness of adding narrow-band filter to prevent 5G band interference, in the scenario of multiple base stations with different distribution, using 5G real-time service function, test the signal reception quality of satellite receiving antenna before and after adding narrow-band filter, and judge whether the mainstream scheme of adding narrow-band filter has actual anti-5G interference effect. At the same time, by setting different transmission power of 5G base station, the boundary range of 5G service interference to satellite downlink reception is detected. The test results show that some 5G frequency bands interfere with the satellite C-band downlink. The transmission power of 5G base station, different service types of 5G and the position relationship between the base station and the satellite receiving antenna will affect the satellite reception to varying degrees. The installation of narrow-band filter can significantly reduce the interference of 5G frequency band to the satellite downlink reception.