天气预报 > 其他 > u段和v段哪个距离远
u段和v段哪个距离远
更新时间: 2020-11-13 00:00:00  

u段属于UHF频段,直射波传播比V段更甚,U段穿透力较V段要好,所以在高楼林立的城市用U段的比较多。但同时空气的衰减比V段大,不适合于作远距离通讯。

在夏季等天气不稳定的季节,常会产生叫“大气波导”的异常传播现象,电波在大气三层温度突变层间来回折射,衰减很小地传到远方。还有流星余迹反射和对流层散射等现象,也会使此频段的电波超视距的传播。

关键词: 哪个 距离

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