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当要求火控雷达在战斗掩体内也能照常工作时,其天线相对于收发机柜的垂直距离,往往因此而被设计成可调的,以便天线能从掩体内升起并暴露在掩体之外。当然这也要求馈线能在高度上作相应的调整。但是,馈线波导法兰之间的联接,由于要求保证良好电接触的同时,往往还有气密封的问题,所以供联接用的螺拴数一般都较多。例如 BJ-100与 BJ-70的一对法兰上就分别有四个和六个螺栓。螺栓数的多少,直接影响着调整馈线高度时装拆波导的时间。尤其当馈线通道较多而装拆操作的空间又十分狭窄时,装拆所需要的时间就更多。为了使
When a fire-control radar is required to work as normal in combat bunkers, the vertical distance of its antenna to the transceiver cabinet is often designed to be adjustable so that the antenna can be lifted from the shelter and exposed beyond the shelter. Of course, this also requires that the feeders be adjusted accordingly in height. However, the coupling between the feeder waveguide flanges often has the problem of gas-tightness as well as the need to ensure good electrical contact, so that the number of bolts for coupling is generally large. For example, a flange on the BJ-100 and BJ-70 has four and six bolts, respectively. The number of bolts, a direct impact on the height of the feeder to adjust the timing of the demolition of the waveguide. Especially when there are many feeder channels and the installation and disassembly operations are very narrow, the time required for disassembly is more. because