| 多通道射频接收机测量噪声系数的新方法 |
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| 引用本文： | 吴鸣鸣,张钦宇,路雪莲. 多通道射频接收机测量噪声系数的新方法[J]. 现代电子技术, 2008, 31(14) |
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| 作者姓名： | 吴鸣鸣 张钦宇 路雪莲 |
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| 作者单位： | 1. 哈尔滨工业大学,深圳研究生院通信工程研究中心,广东,深圳,518055
2. 西门子迈迪特深圳磁共振公司,广东,深圳,518055 |
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| 摘 要： | 噪声系数是多通道射频接收机的一个重要参数。传统的噪声系数测量方法对大噪声系数测量存在不足,且测量时通道间会有噪声干扰。提出一种多通道切换优化测量噪声系数的方法:通过设计1个八选一的射频开关实现信道切换,并引入前置低噪声放大器的控制电路提供冷热噪声源,优化Y因子测量噪声系数的方法,实现对各通道的精确测量。由于接收机前端的相似性,该方法可推广应用到其他的射频接收机。
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| 关 键 词： | 噪声系数 射频开关 射频接收机 Y因子法 |
New Method of Noise Figure Measurement for Multi - channel RF Receiver |
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| WU Mingming,ZHANG Qinyu,LU Xuelian. New Method of Noise Figure Measurement for Multi - channel RF Receiver[J]. Modern Electronic Technique, 2008, 31(14) |
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| Authors: | WU Mingming ZHANG Qinyu LU Xuelian |
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| Abstract: | Noise figure is crucial for multi-channel RF receiver.The measurements used before have some disadvantages when measure with big NF,and there is noise interfere among channels as well.Here a new method of noise figure measurement with multi-channel switch is proposed,in which we design a SPMT RF switch and optimize the Y-factor method by adding the control circuit for LNA to provide noise source in different temperature.This method is effective and due to the comparability of receiver front-ends,it can also be used in other RF receiver. |
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| Keywords: | noise figure RF switch RF receiver Y factor method |
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