[1]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):206-210.[doi:10.3969/j.issn.1001-0505.2009.02.004]
 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):206-210.[doi:10.3969/j.issn.1001-0505.2009.02.004]
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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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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
39
期数:
2009年第2期
页码:
206-210
栏目:
电磁场与微波技术
出版日期:
2009-03-20

文章信息/Info

Title:
Effect of transmission leakage on the sensitivity of millimeter-wave CW autodyne system
作者:
陈墨 徐金平
东南大学毫米波国家重点实验室, 南京 210096
Author(s):
Chen Mo Xu Jinping
State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096,China
关键词:
CW多普勒雷达 自差频 收发隔离 接收灵敏度
Keywords:
continue wave Doppler radar autodyne transmitting-receiving isolation receiving sensitivity
分类号:
TN95
DOI:
10.3969/j.issn.1001-0505.2009.02.004
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.
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 maximum allowable power level of the transmission leakage signal is -11 dBm in a Doppler radar system with 26 dB transmitting-receiving isolation. In this case, the decrease of the gain provided by the front-end receiving circuit is less than 2.5 dB. With reference to these parameters, the transmission power and transmitting-receiving isolation can be specified reasonably to eliminate the negative effects caused by the leakage signal on the receiving sensitivity.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 陈墨(1982—),女,博士生; 徐金平(联系人),男,博士,教授,博士生导师,jpxu@seu.edu.cn.
基金项目: 国家自然科学基金委创新群体基金资助项目(60621002).
引文格式: 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):206-210.
更新日期/Last Update: 2009-03-20