| 毫米波直接检波式辐射计温度补偿问题研究 |
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| 引用本文： | 张英浩,杨国,吴文. 毫米波直接检波式辐射计温度补偿问题研究[J]. 南京理工大学学报(自然科学版), 2009, 33(4) |
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| 作者姓名： | 张英浩 杨国 吴文 |
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| 作者单位： | 南京理工大学近程高速目标探测技术国防重点学科实验室,江苏,南京,210094 |
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| 摘 要： | 分析了毫米波放大器温度-增益变化对毫米波直接检波式辐射计输出信号幅度的影响,针对直接在毫米波电路中进行温度补偿技术难度相对较大的情况,提出了在视频放大器电路中引入温度补偿措施使系统总增益保持稳定的温度补偿方法,通过在视频放大器反馈电路中加入合适的热敏电阻对系统增益进行补偿.理论分析和实验结果表明该方法简单有效,使系统输出信号幅度在一定温度范围内保持较好的稳定.
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| 关 键 词： | 毫米波辐射计 直接检波 温度补偿 |
Temperature Compensation of Millimeter-wave Direct Detection Radiometer |
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| ZHANG Ying-hao,YANG Guo,WU Wen. Temperature Compensation of Millimeter-wave Direct Detection Radiometer[J]. Journal of Nanjing University of Science and Technology(Nature Science), 2009, 33(4) |
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| Authors: | ZHANG Ying-hao YANG Guo WU Wen |
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| Affiliation: | Ministerial Key Laboratory of JGMT;NUST;Nanjing 210094;China |
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| Abstract: | The gain of the millimeter-wave amplifier varies with the ambient temperature,and its effect on the amplitude of the output signal of the millimeter-wave direct detection radiometer is analyzed.As it is difficult to do temperature compensation in millimeter-wave circuits directly,a thermistor is added to the feedback circuit of the video amplifier as temperature compensation to keep the total gain of the receiver constant when the temperature changes.This temperature compensation method is much easier than ... |
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| Keywords: | millimeter-wave radiometers direct detection temperature compensation |
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