基本解释环形波导混频器英汉例句双语例句For the limitations of the bandwidth and precision of manufacture, rat-race upper-sideband balanced mixer is utilized in order to realize up conversion.出于工作带宽和加工精度等方面的因素的考虑，设计采用的是环形电桥单边带平衡混频器来实现上变频。