高灵敏度自动增益控制接收机群时延波动畸变的预判分析
Prejudgment and Analysis of the Distortion of Group Delay Ripple for High-Sensitivity Automatic Gain Control Receiver
- 电子学报 2023年51卷第8期 页码：2011-2019
- 作者机构：
1.西北工业大学电子信息学院，陕西西安 710129
2.西安空间无线电技术研究所，陕西西安 710100
- 作者简介：
[ "李斌 男，1986年出生，陕西西安人.分别于2008年和2011年在浙江大学获得工学学士和工学硕士学位.现为西安空间无线电技术研究所高级工程师、硕士生导师.主要研究方向为卫星微波收发链路和空间微波毫米波有源部组件设计.E-mail: lblblb_999@126.com" ]
[ "苏嘉琪 女，1999年10月出生，陕西咸阳人.2021年在西安电子科技大学获得工学学士学位.现为西安空间无线电技术研究所微波所硕士研究生.主要研究方向为空间微波技术.E-mail: Su_Sookie@163.com" ]
- 基金信息：国家自然科学基金面上项目(12175176);国家级重点实验室基金(6142411205202)
DOI：10.12263/DZXB.20211606
中图分类号： TN850.3;收稿：2021-12-01，
修回：2022-06-10，
纸质出版：2023-08-25
- 稿件说明：
移动端阅览
李斌,苏嘉琪,陈国伟等.高灵敏度自动增益控制接收机群时延波动畸变的预判分析[J].电子学报,2023,51(08):2011-2019.
LI Bin,SU Jia-qi,CHEN Guo-wei,et al.Prejudgment and Analysis of the Distortion of Group Delay Ripple for High-Sensitivity Automatic Gain Control Receiver[J].ACTA ELECTRONICA SINICA,2023,51(08):2011-2019.
李斌,苏嘉琪,陈国伟等.高灵敏度自动增益控制接收机群时延波动畸变的预判分析[J].电子学报,2023,51(08):2011-2019. DOI： 10.12263/DZXB.20211606.
LI Bin,SU Jia-qi,CHEN Guo-wei,et al.Prejudgment and Analysis of the Distortion of Group Delay Ripple for High-Sensitivity Automatic Gain Control Receiver[J].ACTA ELECTRONICA SINICA,2023,51(08):2011-2019. DOI： 10.12263/DZXB.20211606.
摘要
随着高性能卫星测控技术、导航技术、深空探测技术的发展以及宽带扩频等技术的大量应用，对星载高灵敏度自动增益控制接收机群时延波动指标的要求也越来越严格.而在工程实践中，高灵敏度接收机的某些微波特性会导致群时延波动的畸变.本文通过分析微波高灵敏度接收机自动增益控制环路的变化及干扰、反射、微波泄露等实际的工况，对群时延波动进行了估算，推导出了其畸变的预判公式，得出了自动增益控制接收机群时延波动畸变的预判依据.最终，本文通过对星载L频段高灵敏度导航接收机实例分析和设计，将其自动增益控制环路中可调衰减器群时延调整为
<math id="M1"><mn mathvariant="normal">8.7</mn><mtext> </mtext><mi mathvariant="normal">p</mi><mi mathvariant="normal">s</mi></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155719&type=
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155687&type=
7.45066643
2.87866688
，小于
<math id="M2"><mn mathvariant="normal">18.6</mn><mtext> </mtext><mi mathvariant="normal">p</mi><mi mathvariant="normal">s</mi></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155722&type=
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155708&type=
9.05933285
2.87866688
的指标；内部电磁泄露空间隔离度为
<math id="M3"><mo>-</mo><mn mathvariant="normal">60</mn><mtext> </mtext><mi mathvariant="normal">d</mi><mi mathvariant="normal">B</mi></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155730&type=
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155725&type=
9.31333351
2.37066650
，优于
<math id="M4"><mo>-</mo><mn mathvariant="normal">46</mn><mtext> </mtext><mi mathvariant="normal">d</mi><mi mathvariant="normal">B</mi></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155752&type=
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155734&type=
9.31333351
2.37066650
的指标；驻波比为1.5，优于2.2的指标；镜频抑制为
<math id="M5"><mn mathvariant="normal">25</mn><mtext> </mtext><mi mathvariant="normal">d</mi><mi mathvariant="normal">B</mi><mi mathvariant="normal">c</mi></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155743&type=
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155757&type=
8.97466660
2.37066650
，大于所需的
<math id="M6"><mn mathvariant="normal">20.8</mn><mtext> </mtext><mi mathvariant="normal">d</mi><mi mathvariant="normal">B</mi><mi mathvariant="normal">c</mi></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155790&type=
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155772&type=
11.34533310
2.37066650
的指标.经系统联试验证，群时延波动畸变小于
<math id="M7"><mn mathvariant="normal">1</mn><mtext> </mtext><mi mathvariant="normal">n</mi><mi mathvariant="normal">s</mi></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155797&type=
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61155808&type=
5.07999992
2.37066650
，说明针对高灵敏度自动增益控制接收机群时延波动畸变的预判分析方法及结果正确，对其工程设计、器件选取具有重要的指导意义.
Abstract
With the development of high-performance satellite measurement and control technology
navigation technology
deep space exploration and wide applications of broadband spread-spectrum technology
strict requirements are put forward for the distortion of group delay ripple for the spaceborne high-sensitivity automatic gain control receiver. But in engineering practice
due to some microwave characteristics of the high-sensitivity receiver
there may be distortion in group delay ripple. By analyzing the distortion caused by the variation of automatic gain control loop and its microwave leakage
reflection and mirror frequency interference
the approximate analysis formula in the worst case is deduced
and the prediction basis of group delay distortion is given. Through the analysis and design of spaceborne L-band high-sensitivity navigation receiver
the group delay change of adjustable attenuator in the automatic gain control loop is 8.7 ps
less than the index 18.6 ps; the spatial isolation of internal electromagnetic leakage -60 dB is better than the index -46 dB; the standing wave ratio of 1.5 is better than the index 2.2
and the mirror frequency suppression of 25 dBc is greater than the required 20.8 dBc. Finally
the system test shows that the group delay ripple distortion is less than 1 ns
which proves that the prejudgment method and results for the group delay ripple distortion of high-sensitivity automatic gain control receiver are correct
which has important guiding significance for its engineering design and device selection.
关键词
Keywords
references
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