| 一种分段无源预选滤波器的设计 |
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| 引用本文： | 陈锟,代兵,朱正平,蓝加平.一种分段无源预选滤波器的设计[J].中南民族大学学报(自然科学版),2012,31(1):75-79. |
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| 作者姓名： | 陈锟 代兵 朱正平 蓝加平 |
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| 作者单位： | 中南民族大学电子信息工程学院,武汉,430074 |
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| 基金项目： | 国家自然科学基金仪器专项资助项目(41127003);湖北省自然科学基金重点资助项目(2010CDA062);国家科技基础性专项重点资助项目(2008FY120100) |
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| 摘 要： | 给出了一种分段无源预选滤波器的设计,以提高接收机对带外强干扰的抑制能力及信噪比、灵敏度等指标.该预选滤波器采用无源LC并联谐振实现滤波,微控制器控制衰减倍数来调节滤波器的输出幅度.将预选滤波器加入到扫频雷达中对电离层进行探测,实验结果表明：该滤波器提高了接收机的信噪比、灵敏度,对带外强干扰的抑制能力可达20 dB,改善了雷达的性能.
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| 关 键 词： | 短波无线电 扫频接收机 预选滤波器 |
Design of the Menogenesis Passive Preselected Filter |
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| Chen Kun,Dai Bing,Zhu Zhengping,Lan Jiaping.Design of the Menogenesis Passive Preselected Filter[J].Journal of South-Central Univ for,2012,31(1):75-79. |
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| Authors: | Chen Kun Dai Bing Zhu Zhengping Lan Jiaping |
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| Institution: | (College of Electronics and Information Engineering,South-Central University for Nationalities,Wuhan 430074,China) |
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| Abstract: | The receiver’s parameters such as the rejection capability of interference outside the band,the signal to noise ratio,and the sensitivity can be improved by using the merogenesis passive preselected filter in the front end of the receiver.The preselected filter is realized by parallel resonance passive LC circuits and its output magnitude is controlled by the microcontroller adjusting the attenuator coefficient.The experimental results show that the preselected filter improved the receiver’s parameters of the signal to noise ratio and the sensitivity,had the ability to suppress strong interference of outside the band reached 20dB and promoted the performance of the radar. |
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| Keywords: | Shortwave radio sweep-frequency receiver preselected filter |
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