摘要
为了提高野外探测环境的适合性,设计得到了微波辐射发生器ACNS核心电路结构设计。在C波段运行的ACNS电路结构运行阶段,此ACNS的工作中心频率等于6.8 GHz,带宽达到35 MHz以上,同时输出低于150 K的噪声温度。利用最小化的方式来完成最佳输入功率与噪声匹配状态下对TS,1进行最小化的过程。加入栅极与漏极匹配网络之后,可以把源阻抗与负载阻抗转换为满足场效应管要求。实验性能测试得到:ACNS输出亮温处于VDs<5.5 V或VGs>-0.3 V的情况下发生了快速增加的现象,处于VDs=3~5 V与VGs=-0.8^-0.4 V范围内时则保持相对稳定,都在150 K以内,实际测试数据和仿真结果相符。此ACNS经过6 h连续测试后,噪声温度把持恒定状态,形成了稳定的置信区间。
In order to improve the suitability of field detection environment, the ACNS core circuit structure of microwave radiation generator was designed.In the operation stage of ACNS circuit structure operating in c-band, the working center frequency of this ACNS is equal to 6.8 GHz, the bandwidth is above 35 MHz, and the noise temperature output is lower than 150 K.The minimization process of TS, 1 under the condition of the optimal input power matching with noise is completed by the minimization method.The source impedance and load impedance can be converted to meet the fet requirement after the grid and drain matching network is added.The experimental performance test showed that the ACNS output bright temperature increased rapidly when VDs<5.5 V or VGs>-0.3 V, and remained relatively stable when VDs=3~5 V and VGs=-0.8^-0.4 V, both within 150 K. The actual test data were consistent with the simulation results. After 6 h continuous test, the noise temperature is kept constant and a stable confidence interval is formed.
作者
陈彦霖
董浩
Chen Yanlin;Dong Hao(Guangdong Institute of Arts and Sciences(GIAS)Department of Electromechanical Engineering,Zhanjiang 524400,China;Beijing institute of radio survey,Beijing 100854,China)
出处
《电子测量技术》
2019年第20期110-113,共4页
Electronic Measurement Technology
关键词
微波辐射
核心电路
结构设计
性能测试
microwave radiation
core circuit
structural design
performance test
