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西屋电气公司设计和鉴定了一种晶体控制的 x 波段频率源,它具有极高的频谱纯度,输出功率为750毫瓦。鉴定的结果表明,当制做一个高频谱纯度的振荡器时,谐波产生器和晶体管放大器可能限制着 x 波段上所能达到的频谱纯度。文中给出了振动环境下振荡器和谐波产生器频谱纯度的测量结果。
Westinghouse designed and certified a crystal-controlled x-band frequency source with extremely high spectral purity and output of 750 milliwatts. The qualification results show that harmonic generators and transistor amplifiers may limit the spectral purity that can be achieved on the x-band when making a high-spectral-purity oscillator. The measurement results of the spectral purity of oscillator and harmonic generator in vibration environment are given in this paper.