| 毫米波自差频CW系统发射漏波信号对接收灵敏度的影响 |
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| 引用本文： | 陈墨,徐金平.毫米波自差频CW系统发射漏波信号对接收灵敏度的影响[J].东南大学学报(自然科学版),2009,39(2). |
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| 作者姓名： | 陈墨 徐金平 |
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| 作者单位： | 东南大学毫米波国家重点实验室,南京,210096 |
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| 基金项目： | 国家自然科学基金创新研究群体基金 |
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| 摘 要： | 针对Ka波段自差频式连续波(CW)多普勒雷达系统中发射漏波信号对接收灵敏度的影响问题,通过计算机建模仿真和实验测试,对存在发射功率泄漏干扰情况下一个接收系统前端(包括低噪声放大器和混频器)的工作性能进行了深入研究.结果表明,在收发隔离度为26 dB时,系统所允许的最大发射漏波信号功率电平为-11 dBm,接收系统前端增益恶化小于2.5 dB.根据这些参数,通过合理设计发射功率电平和收发隔离度,可以保证接收系统的探测灵敏度指标的实现.
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| 关 键 词： | CW多普勒雷达 自差频 收发隔离 接收灵敏度 |
Effect of transmission leakage on the sensitivity of millimeter-wave CW autodyne system |
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| Chen Mo,Xu Jinping.Effect of transmission leakage on the sensitivity of millimeter-wave CW autodyne system[J].Journal of Southeast University(Natural Science Edition),2009,39(2). |
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| Authors: | Chen Mo Xu Jinping |
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| Institution: | State Key Laboratory of Millimeter Waves;Southeast University;Nanjing 210096;China |
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| Abstract: | Due to limited transmitting-receiving isolation,the receiving sensitivity of Ka-band autodyne continue wave(CW) Doppler radar system is usually affected by a relatively high power leaking signal from the transmitter.In order to guarantee the sensitivity,the performance of the front-end receiving circuit(including low noise amplifier and mixer) influenced by the leaking signal has been investigated through simulation and experimental measurement.According to the simulation and experimental results,the maximu... |
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| Keywords: | continue wave Doppler radar autodyne transmitting-receiving isolation receiving sensitivity |
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