历史 “正如赫兹第一次所指出,电波可以从导体上全部反射回来。我在一些试验中发现了它们从数英里外金属物体上反射回来的效应。在我看来,有可能设计出这样一种设备,舰艇借助它可以向所要求的任一方向辐射或发射一束发散射线,这些线射若遇到一个金属目标,如另一只轮船或舰艇,则能反射回与电波发射舰艇上发射机相隔开的接收机,从而可以直接显示出雾或阴霾天气中另一舰艇的存在和方位”(—S.G.马可尼,无线电报 History “As Hertz first pointed out, radio waves can all be reflected back from the conductor, and in some experiments I discovered the effect they reflected back from metal objects miles away. In my opinion, it is possible to design a Equipment that enables the ship to radiate or launch a beam of divergent radiation in either direction as required, which line of fire, if encountered with a metal target, such as another ship or ship, can be reflected back onto the ship launching Machine that separates the receiver so that it can directly show the presence and orientation of another ship in fog or hazy weather ”(-SG Marconi, Radiotelephone