本文選題：雷達回波仿真　切入點：光纖延遲線　出處：《光學精密工程》2017年05期 　論文類型：期刊論文

【摘要】：針對高分辨率雷達回波信號仿真對帶寬、線性度和延時性能的要求,設計了X波段雷達測試與校準應用的小型化微波光纖延遲線。分析了雷達回波模擬源對距離延遲單元的性能要求,根據(jù)系統(tǒng)指標,研制了用于寬帶雷達信號線性電光轉(zhuǎn)換的關(guān)鍵器件—直接調(diào)制分布反饋(DFB)激光器�；诠饫w反射鏡,設計與實現(xiàn)了一種小型化的反射式延遲線結(jié)構(gòu)。最后,利用矢量網(wǎng)絡分析儀對系統(tǒng)的微波傳輸性能進行了測試分析。結(jié)果表明:直接調(diào)制DFB激光器的-3dB模擬調(diào)制帶寬高達21GHz�；谠摷す馄鞯奈⒉ü饫w延遲線,針對X波段雷達測試應用可提供40、80、120μs不同延時的目標回波模擬,其帶內(nèi)幅度平坦度小于±0.5dB,相位非線性小于10°,同時線性動態(tài)范圍大于60dB,滿足雷達回波仿真與校準過程對于信號附加幅頻誤差和相頻誤差的要求。
[Abstract]:Aiming at the requirement of bandwidth, linearity and delay performance for high resolution radar echo signal simulation, A miniaturized microwave fiber delay line for the testing and calibration of X-band radar is designed. The performance requirements of the radar echo analog source for the range delay unit are analyzed. A key device for linear electro-optic conversion of wideband radar signals, a direct-modulated distributed feedback DFB laser, is developed. Based on the fiber mirror, a miniaturized reflective delay line structure is designed and implemented. The microwave transmission performance of the system is tested and analyzed by using a vector network analyzer. The results show that the analog modulation bandwidth of the direct-modulated DFB laser is up to 21 GHz. In view of X-band radar test application, target echo simulation with different time delay of 40 ~ 80 渭 s and 120 渭 s can be provided. The in-band amplitude flatness is less than 鹵0.5 dB, the phase nonlinearity is less than 10 擄, and the linear dynamic range is more than 60 dB, which meets the requirements of radar echo simulation and calibration for the additional amplitude frequency error and phase frequency error.
【作者單位】： 中國科學院半導體研究所集成光電子學國家重點實驗室;
【基金】：國家自然科學基金資助項目(No.60902067) 吉林省重大科技攻關(guān)項目(No.11ZDGG001)
【分類號】：TN253;TN957.51
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本文編號：1569701