波导魔T在微波、毫米波及宽频带技术中有着广泛的应用,本文针对波导魔T作为和差器,在某波导天线的工程应用中出现的隔离度性能下降的典型故障进行分析研究,通过计算机仿真和故障模式复现等大量试验,对该故障进行了准确定位,采取有效的预防措施后,后续产品再没出现同类故障。 Waveguide magic T has a wide range of applications in microwave, millimeter wave and wideband technology. In this paper, we analyze and study the typical fault that the isolation performance degrades when a waveguide antenna works as a sum and difference filter. Simulation and fault mode reappearance of a large number of tests, the fault has been accurately positioned to take effective preventive measures, follow-up products and no similar failures.