| 电扫描恒差比幅测向精度分析 |
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| 引用本文： | 赵振才,林志远. 电扫描恒差比幅测向精度分析[J]. 现代电子技术, 2005, 28(17): 3-4,8 |
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| 作者姓名： | 赵振才 林志远 |
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| 作者单位： | 解放军93655部队,北京,101500 |
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| 摘 要： | 电扫描多波束恒差比幅测向体制在现代雷达截获接收机中有着广泛应用。他是由微波开关依次快速接通各个天线，通过比较相邻天线接收通道上信号幅度的大小来实现测向的。文章首先以任两个相邻天线和全向参考天线接收及信号处理过程，详细推导了电扫描恒差比幅测向方程。然后以该方程为基础，根据该方程中各个观测量相互独立的特点，方位测量误差的均方根值可由测向方程的全微分求得，并将其作为电扫描恒差比幅测向的精度，由该精度公式可以看出，电扫描恒差比幅测向有很高的精度，并且在不同的角度上，其精度保持稳定。
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| 关 键 词： | 雷达截获系统 恒差比幅测向 精度分析 天线 |
| 文章编号： | 1004-373X（2005）17-003-02 |
| 收稿时间： | 2005-05-29 |
| 修稿时间： | 2005-05-29 |
Precision Analysis of Electronic Scan Constant Difference Amplitude Comparison Direction Measurement |
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| Zhao Zhencai,Lin Zhiyuan. Precision Analysis of Electronic Scan Constant Difference Amplitude Comparison Direction Measurement[J]. Modern Electronic Technique, 2005, 28(17): 3-4,8 |
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| Authors: | Zhao Zhencai Lin Zhiyuan |
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| Abstract: | The system of Electronic Scan Multibeam Constant Difference Amplitude Comparison(ESCDAC)direction measurement is widely applied in modern radar interception receivers.microwave switches fleetly switch on antennas one by one.The direction measurement is realized by comparing the signal amplitude of two borders upon antenna receiver channels.Firstly,based on the inception and procession of two borders upon antenna receiver channels and fulldirection reference antenna.The equation of ESCDAC is presented.Secondly,Based on this equation and the independent characteristic of observation valves,the ESR of the azimuth measurement error is presented by full difference of the measurement equation which acts as the precision of ESCDAC.From this precision formula,the precision of ESCDAC is high and steady in different angles. |
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| Keywords: | radar interception system constant difference amplitude comparison direction measurement precision analysis antenna |
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