Performance Improvement of Microwave Amplifier Using Micromachined Suspended Inductors and Electromagnetic Interference (EMI) Improvement in Nuclear Power Plant

• Main Authors: Zong-Wei Li, 李宗維
• Other Authors: To-Po Wang
• Format: Others
• Language: en_US
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/95st96

碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 101 === Thesis research can be divided into three parts. The first part introduces a low-voltage low-power K-band 0.18-um CMOS low-noise amplifier (LNA) using micromachined inductors. By splitting the dc current paths of the triple-cascode structures and using a forward-body-biased technique, the supply voltage and dc power dissipation of this LNA can be effectively reduced. Moreover, inductors are inserted between the MOSFETs of the triple-cascode stage to achieve low noise figure (NF). To improve LNA performance in terms of gain and NF, micromachined inductors are adopted in this work. By using this technique, the measured peak gain of the microwave amplifier can be significantly increased from 12.3 to 13.7 dB due to the high Q-factor suspended inductors and noise figure is effectively improved from 5.8 to 5.0 dB The second part introduces the building of nuclear power plants using Advanced Boiling Water Reactor (ABWR) units that is under construction. This model is designed with a Fine-Motion Control Rod (FMCRD) for high performance. However, the FMCRD produces electromagnetic noise, and the Startup-Range Neutron Monitoring (SRNM) System is very sensitive to the electromagnetic noise. To overcome this difficulty, zippered cable shielding can be used to conceal the SRNM and FMCRD cables. This approach not only achieves a remarkable 48.8% noise amplitude reduction, but also minimizes the radiated emissions from the FMCRD cables, leading to an improved, stabilized SRNM system. The third part presents a K-band containing active Phase Calibration Technique (PCT) of the 0.18-um CMOS microwave amplifier. The proposed PCT technology effectively reduces pahse error by the effects of parasitic components and circuit mismatch of the impedance. Within the low noise DC-current-path preamplifier, this active balun circuit can be employed as low-noise amplifier as well. By using this technique, the simulated peak gain and noise figure of the LNA are 16.7dB and 4.9dB,and the phase error and gain error are 5.2 degree and 1.8dB, the overall power consumption of amplifier is 6.9mW.