基于微波光子相干接收的宽带射频前端技术  

Broadband RF Frontend Technique Based on Coherent Heterodyne Detection in Microwave Photonics

作　　者：崔岩 徐嘉鑫[1] 杨振 龙敏慧 方宇轩 CUI Yan;XU Jiaxin;YANG Zhen;LONG Minhui;FANG Yuxuan(Southwest China Research Institute of Electronic Equipment,Chengdu 610036,CHN;College of Optoelectronic Engineering,Chongqing University,Chongqing 400030,CHN)

机构地区：[1]西南电子设备研究所,成都610036 [2]重庆大学光电工程学院,重庆400030

出　　处：《半导体光电》2022年第1期84-88,共5页Semiconductor Optoelectronics

摘　　要：提出了一种适用于电子战应用的宽带大动态微波光子射频前端方案,通过采用双边带抑制载波及微波光子相干接收技术,能够有效改善前端的噪声系数、无杂散动态范围等。在6~18 GHz工作频带内,该射频前端无杂散动态范围达到110 dB·Hz^(2/3)、噪声系数优于8 dB、多通道幅度一致性优于±1 dB、多通道相位一致性优于±10°,实现了宽带射频信号的高性能传输,同时满足阵列光学波束需求。A broadband microwave photonic front-end that suits for electronic warfare is proposed in this paper. Significant improvement in noise figure and spur-free dynamic range is accomplished by using double sideband suppressed carrier modulation and balanced coherent heterodyne detection. In the frequency bandwidth of 6~18 GHz, a spur-free dynamic range up to 110 dB·Hz^(2/3), a noise figure of 8 dB, an amplitude consistency better than ±1 dB and a phase consistency better than ±10° are implemented by using coherent detection, which makes it especially applicable for microwave photonic beam-forming, in addition to the RF transmission.

关 键 词：射频前端 相干接收 抑制载波 无杂散动态范围 噪声系数 

分 类 号：TN929.1[电子电信—通信与信息系统]