De Forest:american electrical engineer who patented the triode electron tube (1907) that made possible the amplification and detection of radio waves. He originated radio news broadcasts in 1916.

• "德福雷斯特:美国电力工程师；获三极电子管的发明专利(1907年)；该发明使无线电波的增幅和检波成为可能.；1916年他首创无线电新闻广播