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本文主要阐述用介质谐振器稳频的两种高稳定度C波段固态源的分析、设计和实验结果。一种是将介质谐振器作成温度稳定的鉴频器,通过自动频率控制(AFC)环路对微波晶体管振荡器进行稳频的源;另一种是使介质谐振器与振荡器发生直接耦合,以加载带阻滤波器方式进行稳频的源。两种稳频方法均能获得极佳的稳频效果,实验证明这两种C波段的稳频源:在-40℃至+60℃环境温度范围内的频率漂移可做到小于±250KHz,一般的不超过±500KHz;源的输出功率在10毫瓦上下;其噪声比没有稳频措施时低20dB以上。这类微波源可作雷达、导航和通讯等设备中的本振源用。
This paper mainly expounds the analysis, design and experimental results of two high-stability C-band solid state sources stabilized by dielectric resonators. One is to make the dielectric resonator as a temperature-stable frequency discriminator, and the source of the frequency stabilization of the microwave transistor oscillator is controlled by an automatic frequency control (AFC) loop. The other is that the dielectric resonator is directly coupled with the oscillator, To load the band-stop filter frequency source. Both frequency stabilization methods can obtain excellent frequency stabilization effect. Experiments prove that the frequency stabilization sources of these two C-band frequencies can be less than ± 250 KHz in the temperature range of -40 ° C. to + 60 ° C. Generally, Of no more than ± 500KHz; source output power of 10 milliwatts up and down; the noise than the absence of frequency stabilization measures more than 20dB low. Such microwave sources can be used as local oscillator in radar, navigation and communications equipment.