近几年来,国外电波对日本电视接收的干扰现象更加明显。这是伴随着甚高频(VHF)频段电波的E.层传播产生的一种现象。这里,在研讨干扰对策的同时,有必要对E.层传播的若干特性、近邻各国和地区有关频率的发射台设置和干扰实际情况加以论述。 In recent years, the interference of foreign radio waves on Japanese television reception has become more apparent. This is a phenomenon accompanied by E. layer propagation of radio waves in the very high frequency (VHF) band. Here, while studying countermeasures, it is necessary to discuss some characteristics of E. layer propagation, setting up of transmitting stations of relevant frequency in neighboring countries and regions and the actual situation of interference.