一种新型毫米波频率调制器研究  

Study on a New Type Millimeterwave Frequency Modulator

作　　者：葛家龙[1] 何李元[1] 朱卫东 张继国 

机构地区：[1]电子部38所通讯部,合肥230031

出　　处：《微波学报》1997年第2期121-125,133,共6页Journal of Microwaves

摘　　要：本文给出一种新型毫米波频率调制电路，是将腔稳Gunn振荡器与变容管调制电路通过反馈调节电路耦合起来形成的。在确保所需调制频偏的情况下，通过调整环路反馈系数可减小变容管调制电路对Gunn振荡器中心频率稳定度的影响。Gunn振荡器中加一高Q稳频腔，从而可以获得较高的频率稳定度。调制器调制灵敏度为3．5MHz／V，调频线性度优于2％，中心频率稳定度6．5ppm／℃（－20～50℃），输出功率大于17dBm。In this paper a new circuit principle for millimeter wave frequency modulator is described. A cavity Gunn oscillator and a varactor-tuned circuit are coupled by a feedback adjusting loop. When the modulation sensitivity is enough, the loop feedback coefficent must be decreased for decreasing the influence of varactor diode to the oscillator frequency stability. The Gunn oscillator is stabilized by a high Q cavity. The modulation sensitivity is 3. SMHz/V and the modulation linearity is better than 2%. Oscillation frequency stability obtained (at center frequency) is 6. 5ppm/℃ over -20℃ to +50℃ temperature range with power output more than 17 dBm.

关 键 词：频率调制 反馈调节环路 毫米波 调制器 

分 类 号：TN761.2[电子电信—电路与系统]