| 摘要: |
| 在电子战多频段跳频信号实时截获、雷达厘米级高分辨率探测、高速数据传输信号完整性测试等前沿军事及高技术领域，信号的瞬时带宽已突破8 GHz，而目前主流的中高端频谱仪瞬时带宽仅为2～4 GHz，已难以满足这些信号测试场景的使用要求。针对该问题，提出了一种新型硬件架构的频谱分析仪，其瞬时带宽可达9 GHz。解析了该分析仪主要组成部分的设计方案，基于射频直采和高速串行总线传输技术，仅使用8条差分信号线实现了158.4 Gb/s的高速数据传输。同时介绍了速率适配数据处理等关键技术，阐述了通信接口的逻辑设计，并论证了分析仪的主要性能指标。该分析仪具备9 GHz瞬时带宽信号的无失真捕获与实时分析能力，可解决主流频谱仪无法分析更大瞬时带宽信号的问题，其技术具备先进性，瞬时带宽性能在行业内处于领先水平。 |
| 关键词: 信号测试 超大瞬时带宽 射频直采 高速数据传输 |
| DOI：10.20079/j.issn.1001-893x.251031003 |
|
| 基金项目: |
|
| Hardware Design of a 9 GHz Ultra-wide Instantaneous Bandwidth Spectrum Analyzer |
| CHEN Feilong |
| (Chengdu Spaceon T&C Technology Co.，Ltd.，Chengdu 611731，China) |
| Abstract: |
| In the latest military and high-tech fields such as real-time interception of multi-band frequency hopping signals in electronic warfare，centimeter-level high-resolution radar detection，and signal integrity test for high-speed data transmission，the instantaneous bandwidth of signals has exceeded 8 GHz.However，the leading spectrum analyzers only provide an instantaneous bandwidth of 2~4 GHz，which can hardly meet the usage requirements of these signal test scenarios.To address this issue，a spectrum analyzer with new hardware architecture is proposed.Its instantaneous bandwidth reaches 9 GHz.The design of its main components is analyzed.Based on RF direct sampling and high-speed serial bus transmission technology，high-speed data transmission of 158.4 Gb/s is achieved by using only 8 differential pairs.Meanwhile，key technologies such as rate-adaptive data processing are introduced，and the logic design of communication is elaborated，and the key specifications are verified.The lossless capture and real-time analysis of signals with 9 GHz instantaneous bandwidth are realized，indicating that the analyzer can solve the problem that leading spectrum analyzers cannot analyze signals with higher instantaneous bandwidth.With advanced technologies，its instantaneous bandwidth performance is in a leading level within the industry. |
| Key words: signals test ultra-wide instantaneous bandwidth RF direct sampling high-speed data transmission |
《电讯技术》编辑部 