| 摘要: |
| 未来空中战场对抗日趋激烈，以第四代隐身战斗机为代表的超隐身目标以及以无人机为代表的低小慢目标已成为空战场的重要威胁。机载雷达对此类目标进行探测时，需要大幅提高发射功率，目标回波将淹没于强杂波中难以检测。由于杂波残余功率的大小受频率源相位噪声的影响，采用低相位噪声的微波光子振荡器有望提升机载雷达在强杂波环境下的探测性能。本文首先建立了存在本振相位噪声情况下的脉冲-多普勒雷达收发模型，分析了本振相位噪声对快时间域脉冲压缩的影响。进一步通过仿真研究验证了在进行二维相参积累时，采用低相噪微波光子本振能够显著降低杂波残余功率，有利于机载雷达对隐身和低小慢目标的探测。 |
| 关键词: 机载雷达 相位噪声 光电振荡器 杂波残余功率 脉冲压缩 相参积累 |
| DOI：DOI:10.3969/j.issn.1672-2337.2026.02.006 |
| 分类号:TN957 |
| 基金项目:江苏省卓越博士后计划（2024ZB773） |
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| Detection Performance Analysis of Microwave Photonic Radar with Low Phase Noise |
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JIANG Xin， HE Yifei， ZHANG Daoming， YANG Yue， LUO Ding
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1. AVIC Leihua Electronic Technology Research Institute , Wuxi 214063, China;2. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China;3. Aviation Military Representative Office of Army Equipment Department in Shanghai, Shanghai 200031, China
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| Abstract: |
| The confrontation in the future air battlefield is becoming increasingly fierce, super stealth targets represented by the fourth generation stealth fighter, together with low-altitude small slow targets represented by drones, have become important threats to the air battlefield. When airborne radar detects such targets by increasing the transmit power, the target echo will be submerged in strong clutter and difficult to be detected. Because the residual clutter power is strongly affected by the phase noise of the frequency source, detection performance is expected to be improved by implementing the microwave photonic oscillator with low phase noise. A pulse-Doppler radar transceiver model in the presence of the phase noise is established in this paper. Further the impact of the phase noise on the pulse compression is theoretically analyzed. Simulation experimental results verify that microwave photonic oscillator with low phase noise can significantly reduce the residual clutter power during two-dimensional coherent accumulation, which is beneficial for airborne radar to detect stealth and low-altitude small slow targets. |
| Key words: airborne radar phase noise opto-electronic oscillator residual clutter power pulse compression coherent accumulation |
