提高近场测量系统隔离度的方法研究

doi:10.3969/j.issn.1009-086x.2020.01.015

现代防御技术 ›› 2020, Vol. 48 ›› Issue (1): 95-99.DOI: 10.3969/j.issn.1009-086x.2020.01.015

提高近场测量系统隔离度的方法研究

沈小玲, 冯孝斌, 张达凯, 刘胤凯, 张云, 冯雨

电磁散射重点实验室,北京 100854

收稿日期:2018-06-22 修回日期:2019-09-03 出版日期:2020-02-20 发布日期:2021-01-20
作者简介:沈小玲(1986-),女,河北邢台人。高工,硕士,研究方向为电磁场与微波。通信地址:100854 北京市142信箱207分箱 E-mail:shenxl207@163.com

Design Method of Improving the Near Field Measurement Isolation

SHEN Xiao-ling, FENG Xiao-bin, ZHANG Da-kai, LIU Yin-kai, ZHANG Yun, FENG Yu

Science and Technology on Electromagnetic Scattering Laboratory,Beijing 100854,China

Received:2018-06-22 Revised:2019-09-03 Online:2020-02-20 Published:2021-01-20

摘要/Abstract

摘要： 近场电磁散射特性测量中,发射机发出的大功率信号直接或经反射后进入接收机,容易引起接收机阻塞;同时发射信号经功率放大器后波形改变出现较长的拖尾,拖尾信号与经过目标散射后的回波信号叠加后同时进入接收机,回波信号会受到严重影响。如果系统隔离度较差,以上问题将会导致接收机动态范围不足,系统测量能力受到制约。通过采用时域滤波、天线优化设计等给出了一种提高近场电磁散射特性测量收发隔离度、改善低RCS(radar cross-section)测量性能的设计方法。

关键词: 近场, 电磁散射特性, 测量, 收发隔离, 天线设计, 接收机, 动态范围

Abstract: In the measurement of near field electromagnetic scattering characteristics, the transmitter′s high-power signal enters the receiver directly or after reflection, which is easy to cause the receiver block. After power amplifier, emission signal waveform changed and got a long tail, the tail and the target scattering echo signal enter into the receiver at the same time, the echo signal will be seriously affected by the trailing. Above problem will lead to the insufficient of receiver dynamic range and the measuring capability of the system is influenced. A method with time domain filtering and optimization design of antenna is proposed, which improves the receiver isolation of the near-field electromagnetic scattering characteristics of measuring and the low radar cross-section (RCS) measurement.

Key words: near field, electromagnetic scattering characteristics, measurement, transceiver isolation, antenna design, receiver, dynamic range

中图分类号:

沈小玲, 冯孝斌, 张达凯, 刘胤凯, 张云, 冯雨. 提高近场测量系统隔离度的方法研究[J]. 现代防御技术, 2020, 48(1): 95-99.

SHEN Xiao-ling, FENG Xiao-bin, ZHANG Da-kai, LIU Yin-kai, ZHANG Yun, FENG Yu. Design Method of Improving the Near Field Measurement Isolation[J]. Modern Defense Technology, 2020, 48(1): 95-99.

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提高近场测量系统隔离度的方法研究

Design Method of Improving the Near Field Measurement Isolation

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