Silicon microstrip detectors are widely used in experiments for space astronomy.Before the detector is assembled,extensive characterization of the silicon microstrip sensors is indispensable and challenging.This work ...Silicon microstrip detectors are widely used in experiments for space astronomy.Before the detector is assembled,extensive characterization of the silicon microstrip sensors is indispensable and challenging.This work electrically evaluates a series of sensor parameters,including the depletion voltage,bias resistance,metal strip resistance,total leakage current,strip leakage current,coupling capacitance,and interstrip capacitance.Two methods are used to accurately measure the strip leakage current,and the test results match each other well.In measuring the coupling capacitance,we extract the correct value based on a SPICE model and two-port network analysis.In addition,the expression of the measured bias resistance is deduced based on the SPICE model.展开更多
In recent years, microstrip antennas have been more widely applied in satellite communications, mobile phones, unmanned aerial vehicle （UAV）, and weapons. A micro-electro-mechanical systems-based （MEMS-based） high...In recent years, microstrip antennas have been more widely applied in satellite communications, mobile phones, unmanned aerial vehicle （UAV）, and weapons. A micro-electro-mechanical systems-based （MEMS-based） high-resistance silicon C-band microstrip antenna array has been designed for the intelligent ammunition. The center frequency is 4.5 GHz. A cavity has been designed in substrate to reduce the dielectric constant of silicon and high-resistance silicon has been used as the material of substrate to improve the gain of antenna. It is very easy to be manufactured by using MEMS technology because of the improved structure of the antenna. The results show that the gain of the antenna is 8 dB and voltage standing wave ratio （VSWR） is less than 2 by the analysis and simulation in high freauencv structure simulator （HFSS）.展开更多
本文描述了在硅微条探测器动态性能研究基础上,将硅微条探测器用于 X 射线成像的研究工作。硅微条探测器的条距为200μm。完成了64路读出电路、64路甄别器阵列、64路多通道计数器的研制,实现了成像数据的采集,建立了硅微条探测器成像应...本文描述了在硅微条探测器动态性能研究基础上,将硅微条探测器用于 X 射线成像的研究工作。硅微条探测器的条距为200μm。完成了64路读出电路、64路甄别器阵列、64路多通道计数器的研制,实现了成像数据的采集,建立了硅微条探测器成像应用研究的实验装置。在此基础上,得到了一维成像图像,并提出了用一维扫描的方法,在一维硅微条探测器条件下,实现了二维成像的设想,得到了满意的图像结果,这个设想的实现具有重要的实用价值。展开更多
基金This work was supported by the National Key R&D Program of China(No.2016YFA0400204)the National Natural Science Foundation of China(Nos.11873020,11973097,and U1738210)the Strategic Pioneer Program on Space Science of the Chinese Academy of Sciences(No.XDA15010200)。
文摘Silicon microstrip detectors are widely used in experiments for space astronomy.Before the detector is assembled,extensive characterization of the silicon microstrip sensors is indispensable and challenging.This work electrically evaluates a series of sensor parameters,including the depletion voltage,bias resistance,metal strip resistance,total leakage current,strip leakage current,coupling capacitance,and interstrip capacitance.Two methods are used to accurately measure the strip leakage current,and the test results match each other well.In measuring the coupling capacitance,we extract the correct value based on a SPICE model and two-port network analysis.In addition,the expression of the measured bias resistance is deduced based on the SPICE model.
基金supported by the Chinese PLA General Armament Department under Grant No.51318020305
文摘In recent years, microstrip antennas have been more widely applied in satellite communications, mobile phones, unmanned aerial vehicle （UAV）, and weapons. A micro-electro-mechanical systems-based （MEMS-based） high-resistance silicon C-band microstrip antenna array has been designed for the intelligent ammunition. The center frequency is 4.5 GHz. A cavity has been designed in substrate to reduce the dielectric constant of silicon and high-resistance silicon has been used as the material of substrate to improve the gain of antenna. It is very easy to be manufactured by using MEMS technology because of the improved structure of the antenna. The results show that the gain of the antenna is 8 dB and voltage standing wave ratio （VSWR） is less than 2 by the analysis and simulation in high freauencv structure simulator （HFSS）.
文摘本文描述了在硅微条探测器动态性能研究基础上,将硅微条探测器用于 X 射线成像的研究工作。硅微条探测器的条距为200μm。完成了64路读出电路、64路甄别器阵列、64路多通道计数器的研制,实现了成像数据的采集,建立了硅微条探测器成像应用研究的实验装置。在此基础上,得到了一维成像图像,并提出了用一维扫描的方法,在一维硅微条探测器条件下,实现了二维成像的设想,得到了满意的图像结果,这个设想的实现具有重要的实用价值。
