基辅，乌克兰——今年早些时候，两枚俄罗斯弹道导弹以高超音速飞向乌克兰首都的一处重要政府设施。它们在被无线电信号拦截后坠入第聂伯河。
KYIV, Ukraine—Earlier this year, two Russian ballistic missiles hurtled at hypersonic speeds toward a key government site in Ukraine’s capital city. They crashed into the Dnipro River after being intercepted by a radio signal.
几乎在同一时间，基辅许多手机上的导航应用显示用户位置竟在秘鲁。这正是乌克兰精锐的电子干扰部队“夜巡队”留下的电子印记，该部队声称正是借助其研发的“利马系统”击落了这些导弹。
Around that time, the navigation apps on many phones in Kyiv showed users as located in Peru. It was the electronic calling card of Night Watch, an elite Ukrainian jamming unit that says it downed the missiles with its Lima system.
一场无声的电子战正在俄乌冲突的核心地带激烈展开。交战双方都在以前所未有的规模展开通信信号的攻击与防御，并不断推陈出新；与此同时，美国及其他西方国家也在努力追赶这一技术潮流。美国国防部正投入巨资发展相关新能力。
A silent electronic battle is raging at the heart of the Russia-Ukraine war. Both sides are attacking and defending communication signals on an unprecedented scale, innovating at pace, while the U.S. and other Western countries are working to catch up. The Pentagon is investing heavily in new capabilities.
“这标志着频谱战新时代的到来，”美国陆军电子战能力发展部门负责人马特·舍伯恩中校说道。
“This is a new era of spectrum warfare,” said Lt. Col. Matt Sherburne, the U.S. Army’s chief for electronic warfare capabilities development.