一种2~18 GHz超宽带模拟控温微波光发射机设计  

Design of a 2-18 GHz ultra wideband analog temperature controlled microwave optical transmitter

作　　者：段沽坪 汪滨波 魏恭 朱弋[1] DUAN Guping;WANG Binbo;WEI Gong;ZHU Yi(Sichuan Jiuzhou Electric Appliance Group Co.,Ltd.,Mianyang Sichuang 621000,China;Sichuan Changhong Network Technologies Co.,Ltd.,Mianyang Sichuan 621000,China;The First Military Representative Office of the Air Force Equipment Department in Mianyang,Mianyang Sichuan 621000,China)

机构地区：[1]四川九洲电器集团有限责任公司,四川绵阳621000 [2]四川长虹网络科技有限责任公司,四川绵阳621000 [3]空军装备部驻绵阳地区第一军事代表室,四川绵阳621000

出　　处：《光通信技术》2022年第1期30-34,共5页Optical Communication Technology

摘　　要：针对当前数字控温的光发射机会引入无法消除的杂散干扰信号问题,设计了一款具有电路精简、结构小巧和功耗低等特点的模拟控温微波光发射机,并给出了光发射机的组成和各模块的详细设计电路。根据直接调制原理搭建了微波链路模拟测试系统,测试了模拟控温光发射机的S散射参数、杂散抑制比、谐波抑制比和系统噪声系数等重要指标参数。测试结果表明:S散射参数链路增益≥-25 dB,增益平坦度为±2 dB;杂散抑制比大于90 dB,杂散信号基本淹没在系统底噪中;谐波抑制比超过50 dB,达到了67 dB左右;噪声系数控制在2 GHz@35 dB~18 GHz@56 dB水平,完全满足实际使用要求。Aiming at the problem that the current optical transmitter of digital temperature control introduces the stray interference signal that can not be eliminated,an analog temperature controled microwave optical transmitter with the characteristics of simple circuit,small structure and low power consumption is designed,and the composition of the optical transmitter and the detailed design circuit of each module are given.According to the principle of direct modulation,a microwave link simulation test system is built,and the important index parameters such as S scattering parameters,spurious suppression ratio,harmonic suppression ratio and system noise coefficient of the simulated temperature controlled optical transmitter are tested.The test results show that the link gain of S scattering parameters is greater than or equal to-25 dB,and the gain flatness is±2 dB.When the spurious suppression ratio is greater than 90 dB,the spurious signals are basically submerged in the background noise of the system.The harmonic suppression ratio exceeds 50 dB and reaches about 67 dB.The noise coefficient is controlled at the level of 2 GHz@35 dB–18 GHz@56 dB,which fully meets the practical requirements.

关 键 词：模拟控温 光发射机 微波链路 杂散抑制比 噪声系数 

分 类 号：TN29[电子电信—物理电子学]