基于频控阵的多普勒波束锐化高度表设计

doi:10.12305/j.issn.1001-506X.2021.09.02

系统工程与电子技术 ›› 2021, Vol. 43 ›› Issue (9): 2383-2391.doi: 10.12305/j.issn.1001-506X.2021.09.02

基于频控阵的多普勒波束锐化高度表设计

窦山岳¹, 汪飞¹, 于伟强¹, 周建江¹, 陈军²

1. 南京航空航天大学雷达成像与微波光子教育部重点实验室, 江苏南京 210016
2. 南京信息工程大学电子与信息工程学院, 江苏南京 210044

收稿日期:2020-08-14 出版日期:2021-08-20 发布日期:2021-08-26
作者简介:窦山岳(1996—), 男, 硕士研究生, 主要研究方向为射频隐身技术|汪飞(1976—), 男，副教授，博士，主要研究方向为飞机射频隐身技术与微弱信号检测|于伟强(1996—), 男, 硕士研究生, 主要研究方向为飞机射频隐身技术与目标检测|周建江(1962—), 男, 教授, 博士, 主要研究方向为机载电子信息系统与雷达目标识别|陈军(1988—), 男, 讲师, 博士, 主要研究方向为飞机射频隐身技术与目标跟踪
基金资助:
国家自然科学基金(61801212);江苏省自然科学基金(BK20180423);江苏省自然科学基金(BK20190772);国防科技创新特区资助课题(61801212)

Design of Doppler beam sharpening altimeter based on FDA

Shanyue DOU¹, Fei WANG¹, Weiqiang YU¹, Jianjiang ZHOU¹, Jun CHEN²

1. Key Laboratory of Radar Imaging and Microwave Photonics Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2. School of Electronics and Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China

Received:2020-08-14 Online:2021-08-20 Published:2021-08-26

摘要/Abstract

摘要：

多普勒波束锐化(Doppler beam sharpening, DBS)是飞行器实施地形跟随或地形回避的重要技术。针对飞行器高度表在DBS工作模式的射频隐身需求, 利用频率分集阵列(frequency diversity array, FDA)研究了基于射频隐身的DBS高度表。首先通过研究FDA的辐射方向图特性, 分析了FDA的频率增量依赖特性及其距离周期性对DBS模式的影响。以此为基础, 给出了对于DBS高度表的约束条件, 包括了FDA阵元间频率增量、脉冲重复频率、脉宽等, 同时建立了FDA-DBS高度表的射频隐身模型。仿真表明, 相对于相控阵和多输入多输出等阵列, 基于FDA的DBS高度表具有优秀的射频隐身性能。

关键词: 射频隐身, 高度表, 频率分集阵列, 多普勒波束锐化

Abstract:

Doppler beam sharpening (DBS) is an important technology for aircraft to implement terrain following or terrain avoidance. Aiming at the radio frequency (RF) stealth requirement of the altimeter in the aircraft working under the DBS mode, this paper uses frequency diversity array (FDA) to study the DBS altimeter based on RF stealth. Firstly, the influence of the frequency increment dependence characteristic and distance periodicity of the FDA on the DBS mode is analyzed, by studying the characteristics of the FDA radiation pattern. Based on this, the constraint conditions for the DBS altimeter are given, including the frequency increment between FDA array elements, pulse repetition frequency, pulse width and so on. Meanwhile, the RF stealth model of the FDA-DBS altimeter is established. Simulation shows that the DBS altimeter based on FDA has the best RF stealth performance, compared to phased arrays and multiple input multiple output arrays.

Key words: radio frequency stealth, altimeter, frequency diversity array, Doppler beam sharpening

中图分类号:

TN959.73

窦山岳, 汪飞, 于伟强, 周建江, 陈军. 基于频控阵的多普勒波束锐化高度表设计[J]. 系统工程与电子技术, 2021, 43(9): 2383-2391.

Shanyue DOU, Fei WANG, Weiqiang YU, Jianjiang ZHOU, Jun CHEN. Design of Doppler beam sharpening altimeter based on FDA[J]. Systems Engineering and Electronics, 2021, 43(9): 2383-2391.

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参数名称	取值
发射阵元个数	8
接收阵元个数	8
基准阵元频率/GHz	9.6
发射信号波长/m	0.03
阵元间距/m	0.015
频率增量/kHz	10
发射信号带宽/MHz	80
发射信号脉冲宽度/μs	10
脉冲重复频率/kHz	5
采样频率/MHz	100
接收天线角度/(°)	4
3 dB波束宽度/(°)	4.5
锐化比	64
飞行速度/(m/s)	150
景深中心斜径/km	20
飞行高度/km	15
覆盖方位角/(°)	0~30

参数名称	取值
高度表辐射功率/W	5
发射天线增益/dB	15
截获天线增益/dB	10
系统噪声系数/dB	5
玻尔兹曼常数/(J/K)	1.38×10^-23
标准噪声温度/K	290
传播损耗系数/(dB/km)	0.012 8
虚警概率	10^-6
截获接收机带宽/MHz	200

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基于频控阵的多普勒波束锐化高度表设计

Design of Doppler beam sharpening altimeter based on FDA

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