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福斯特扫描器的原理和设计早在四十年代就提出来了,但在二次大战以后才相继在几种迫击炮侦察校射雷达中运用。为了得到较宽的扫描范围和减轻重量,福斯特扫描器的设计不断地改进。1977年国际雷达会议录中介绍了一种双路扫描器,它与一个偏置的抛物圆柱面的反射器联用时,在方位上能得到45度的扫描扇面,每秒钟约扫17次。福斯特扫描器用铝作材料,制成蜂窝层状结构,並与双路扫描器的技术相结合,已使现设计的福斯特扫描器的重量比原设计减少了约50％。现简单地介绍一下原福斯特扫描器的基本原理及它在设计上的进展。
The principles and design of the Foster Scanner were put forward as early as the 1940s, but were applied successively to several mortar reconnaissance and school-based radars after the Second World War. In order to get a wider scanning range and reduce weight, the design of the Foster Scanner continues to improve. The 1977 International Radiocommunication Conference introduces a two-way scanner that, when used in conjunction with a biased parabolic reflector, produces a 45-degree scanning sector in azimuth at about 17 sweeps per second. The Forster Scanner, made of aluminum for the honeycomb layer structure, combined with the dual-scanner technology, has resulted in the Foster scanner designed to reduce weight by approximately 50% from the original design. Now briefly introduce the basic principle of the original Foster scanner and its design progress.