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一九八四年底,雷达工程师发现他们的研究范围已处于从第二次世界大战战后时期的常规设计到将于二○○○年出现的数控固态系统的转变之中。当他们考察现场工作的雷达系统时,看到的几乎完全是传统的旋转或机械瞄准的抛物柱面反射器天线和隙缝波导天线,这些天线仍然架设在天线塔、车辆和舰船结构上,有人认为它们具有继续存在25年的能力直到相控阵时代。当沿着波导下到发射机时,他们看到的是热电子发射管(磁控管、速调管和行波管),它产生的脉冲工作比为1％左右,这
At the end of 1984, radar engineers found that their research scope was in the midst of a shift from the conventional design of the post-WWII era to the digital solid-state system that will emerge in 2000. When they looked at field-working radar systems, they saw almost completely traditional rotary or mechanical aiming parabolic reflector antennas and slot waveguide antennas that were still attached to antenna towers, vehicles, and ship structures, Think they have the ability to continue for 25 years until the phased array era. When they follow the waveguide down to the transmitter, they see the hot electron-emitting tubes (magnetrons, klystrons, and traveling wave tubes) that produce a pulse duty ratio of about 1%, which