同轴谐振腔微波幅度均衡器的研究

微波幅度均衡器由吸收型λ／4同轴谐振腔作为其基本结构单元，多级子结构级联构成，谐振频率和功率衰减主要通过改变腔长、探针插入深度和微调螺钉来调节。在结构设计时应从谐振频率、功率衰减、功率容量、抑制高次模、阻抗匹配、温度特性等因素综合考虑，确定同轴谐振腔腔长、可调探针尺寸、微调螺钉位置、子结构单元数量和各组件的材料。均衡器的调试是保证均衡器性能的重要步骤，既要保证均衡器的功率输出与目标衰减曲线拟合，同时要考虑降低插入损耗和温度影响，需要结合多种调试技术反复尝试达到最佳匹配。

A Research on Absorptive Coaxial Cavity Resonator Microwave Amplitude Equalizer

The microwave amplitude equalizer is composed of several interconnected substructures, ev?ery one of which is the λ/4 absorptive coaxial cavity resonator. The resonant frequency and power at?tenuation can be changed with the length of the cavity, the depth of the probe and the micro-adjustable screw. The design of microwave equalizer involves the determination of dimensions of the cavity and the probe, location of the micro-adjustable screw, number of substructures, materials of every part, based on the comprehensive consideration of resonant frequency, power attenuation, power capacity, suppression of the high mode, impedance matching and frequency shift to temperature, etc. Tuning e- qualizer is one of most vital steps in ensuring equalizer performance. Several tuning technologies were used to ensure that the actual attenuation curve accordes with the target attenuation curve, the equaliz?er has low insert loss and good matching with input and output terminals, and its character changed slightly with temperature should also be considered at same time.