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微波组件具有频率高、波长短和内部元器件密度高的特点。盒体材料一般使用铝合金,因此容易受到湿气的影响。常见湿气故障可以分为内部故障和外部故障,也可以分为永久性故障和暂时性故障。针对环境试验中遇到的几种微波组件常见的湿气问题,如盒体腐蚀、电路板腐蚀、输出功率下降以及低温升高温时自激振荡,进行了详细描述,给出了部分照片,并进行了深入的机理分析。最后从电路设计和工艺设计的不同方面给出了综合有效的7条微波组件湿气防护措施,这些措施包括元器件的选取、电路板的防护处理、接缝的防护处理和盒体的防护处理等。结果证明这些措施是行之有效的。
Microwave components with high frequency, short wavelength and high density of internal components. Box materials generally use aluminum alloy, so vulnerable to moisture. Common moisture problems can be divided into internal and external faults, can also be divided into permanent faults and temporary faults. Aiming at the common moisture problems of several kinds of microwave components encountered in environmental tests, such as box corrosion, circuit board corrosion, output power drop and self-oscillation when the temperature rises from low temperature to high temperature, a detailed description is given and some photos are given Conducted an in-depth mechanism analysis. Finally, the comprehensive and effective moisture protection measures of seven microwave components are given from different aspects of circuit design and process design. These measures include the selection of components, the protection of circuit boards, the protection of joints and the protective treatment of boxes Wait. The results show that these measures are effective.