Design of Low Noise CMOS Mixer with Adjustable Gain for C-Band Microwave System

• Main Authors: Yu, Feng-Jung, 游豐榮
• Other Authors: Jou, Christina F.
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/77638274490781757000

碩士 === 國立交通大學 === 電機學院電信學程 === 100 === This microwave wideband high-gain low noise CMOS Mixer design for 4 ~8GHz applications are presented in this thesis. In the receiver circuits design, the most of the low noise amplifier to control the noise coefficient (Noise Figure), and has a high gain to suppress noise. The research focuses on reducing the Mixer’s noise figure. The system can omit the low noise amplifier design has been to save the active components of the current consumption and chip area. This high-gain low noise Mixer circuit design applied to 4 ~ 8GHz receiver, the “even harmonic Mixer circuit” architecture. The down-converter input frequency band to 4 ~ 8GHz , LO signal for the 3.7 ~ 7.7GHz, this band signal down-conversion to DC ~ 300MHz. Circuit experimental results, the maximum power conversion gain of 27.5dB and 8.2dB noise figure. Operating voltage of 1.8 volts, the total power consumption is 7.02mW. In this thesis, the circuit design using TSMC 0.18μm mixed-signal complementary metal oxide semiconductor process, the Mixer with on-wafer measurements, the experimental results meet the design goals for the Fire Services Department,802.11a (5.2GHz), the ISM band (5.725GHz ~ 5.850GHz), Civil Aviation Bureau related systems.