D波段辐射计前端的设计与应用
投稿时间:2020-03-01  修订日期:2020-03-19  点此下载全文
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作者单位E-mail
刘军 北京理工大学 lj_bit@163.com 
于伟华 北京理工大学 ywhbit@bit.edu.cn 
中文摘要:设计了D波段直接检波式辐射计前端,主要包括D波段检波器模块、D波段低噪声放大器模块和D波段标准增益喇叭天线。基于商用零偏二极管HSCH-9161研制出D波段检波器,测试结果显示在D波段内,最高灵敏度接近1600 mV/mW,当频率小于140 GHz时,灵敏度大于400 mV/mW,在大于140 GHz频段内,灵敏度优于120 mV/mW。基于自研D波段低噪声放大器芯片研制出D波段低噪放模块,测试结果显示最大增益为10.8 dB@139 GHz,在137~144 GHz频率范围内,增益大于7.8 dB,输入端回波损耗优于5 dB,输出端回波损耗优于8.5 dB。最终搭建D波段直接检波式辐射计前端进行成像实验验证。
中文关键词:D波段,辐射计前端,低噪声放大器,检波器
 
The Study and Application of D-band Radiometer Front-end
Abstract:A D-band(110~170 GHz) direct detection radiometer front-end which consists of detector module,low noise amplifier module and standard gain horn antenna. The D-band detector is designed and fabricated based on zero-bias Schottky barrier diode HSCH-9161 and the measurement shows that the voltage sensitivity is larger than 400 mV/mW between 110~140 GHz, larger than 120 mV/mW in D-band and the maximal value reaches about 1600 mV/mW@110 GHz. The D-band LNA module is packaged with self-designed MMIC and the module measurement shows the peak gain is 10.8 dB@139 GHz,the gain higher than 7.8 dB from 137 GHz to 144 GHz, the measured input return loss (S11) and output return loss (S22) are better than -5 dB and 8.5 dB in operating frequencies, respectively. Finally, the imaging experiments based on this front-end are carried out.
keywords:D-band, radiometer front-end, LNA, detector
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