245 GHz接收机芯片片外测试与实验

Off-chip measurement and experiment of 245 GHz receiver chip

为了实现太赫兹气体频谱分析传感器,对245 GHz次谐波接收机芯片的片外测试展开研究。建立了245 GHz次谐波接收机片外测试系统以及基于245 GHz接收机芯片及发射机芯片的气体频谱分析传感器片外展示测试系统,对245 GHz次谐波接收机芯片转换增益和带宽进行测试。片外测试系统得到15 dB转换增益和15 GHz带宽;片外展示测试系统得到9 dB转换增益和16 GHz带宽。片外测试系统和片外展示测试系统结果基本吻合。在片外展示测试系统中加入气腔,即构成气体频谱分析传感器。与现有同类型传感器相比,本文的次谐波接收机具有高增益、高带宽、集成本地振荡信号、低功耗等优势,非常适用于消费电子领域小体积的智能气体频谱分析传感器。

In order to realize THz gas spectroscopy system,researches upon off-chip measurement of 245 GHz subharmonic receiver chip are conducted.An off-chip measurement system for 245 GHz subharmonic receiver chip is established and an off-chip demonstrator measurement system for gas spectroscopy sensor based on 245 GHz receiver and transmitter chips is fabricated to measure the conversion gain and bandwidth of the 245 GHz subharmonic receiver chip.15 dB conversion gain and 15 GHz bandwidth are obtained in off-chip measurement system,and 9 dB conversion gain and 16 GHz bandwidth are obtained in off-chip measurement demonstrator system.Experimental results indicate that the results of off-chip measurement system and off-chip measurement demonstrator system of 245 GHz subharmonic receiver chip are basically consistent.A THz gas spectroscopy sensor is constructed when a gas chamber filled with some specific kind of gas is added into the off-chip demonstrator measurement system.Compared with available gas spectroscopy of the same type,the subharmonic receiver chip has advantages of high gain,wide bandwidth,being integrated with local oscillation signals,and low power consumption,and is very suitable for applications of low volume intelligent gas spectroscopy in consumer electronics.