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本文介绍了反馈型介质振荡器,给出了介质谐振器尺寸的计算方法.该振荡器在8GHz下,温度范围-40～+70℃,频率稳定度为0.6ppm/℃,输出功率16～30mW,在+55℃下连续工作8 小时,频率漂移小于50kHz,推频系数小于10kHz/V,在偏离载频100kHz的FM噪声为-110dBc/Hz.该振荡器在无人值守中继系统中作上下变频器的本振源,使用良好.这类振荡器在10.7GHz下,温度范围-40～+55℃,频率稳定度0.6ppm/℃,输出功率大于5mW.
In this paper, the feedback type medium oscillator is introduced and the method of calculating the size of the dielectric resonator is given. The oscillator has a temperature range of -40 ~ + 70 ℃ at 8GHz, a frequency stability of 0.6ppm / ℃ and an output power of 16 ~ 30mW , Operating continuously at + 55 ° C for 8 hours with a frequency drift of less than 50kHz, a push coefficient of less than 10kHz / V and an FM noise of -110dBc / Hz at a frequency offset from the carrier frequency of 100kHz. The oscillator operates in an unattended repeater system The local oscillator of the up-and-down frequency converter is in good use.The oscillator has a temperature range of -40 ~ + 55 ℃ at 10.7GHz, a frequency stability of 0.6ppm / ℃ and an output power of more than 5mW.