| 摘要: |
| 针对传统超宽带射频前端组合杂波干扰过多和体积过大的问题，提出了将射频前端通过采用毫米波二次变频的设计方案，使得输入中频和输出射频之间的频率间隔加大，削弱了混频导致的频率组合、杂散和本振反向辐射等干扰。通过对器件功率及电平的合理配置，实现了低噪声、宽频带、大动态的输出，在大于4 GHz的接收频段内，其噪声系数小于3.6 dB，动态范围大于55 dBm。该接收前端还具备低成本、结构紧凑、重量轻等特点，可广泛应用于电子对抗、宽带侦察接收系统。 |
| 关键词: 毫米波接收前端 超宽带 大动态范围 二次变频 |
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| Design of an ultra-wideband millimeter wave receiver front-end |
| ZHANG Xianrong |
| () |
| Abstract: |
| To solve the problem of the combined frequency interference and large size in conventional wideband receiver front-end,a millimeter wave double conversion scheme is proposed in this paper,which expands the interval between input intermediate frequency and output radio frequency so as to weaken the combination frequency interference,output spur and back radiation of local oscillator decrease. By configuring power and supply voltage of device properly,low noise,wideband and large dynamic range at output is realized with noise figure≤3.6 dB and dynamic level≥55 dBm in bandwidth＞4 GHz.The designed front-end is featured by low cost,compact structure and light weight and it can be widely applied in electronic countermeasure,wideband reconnaissance system and other fields. |
| Key words: millimeter wave receiver front-end ultra-wideband large dynamic range double conversion frequency |
《电讯技术》编辑部 