Mixers of Ultra-High Gain from 5.0 to 18.0 GHz

• 作者: Cheng-Huang Tsao Hsin-Chia Yang Jui-Ming Tsai Mu-Chun Wang Sungching Chi Tsin-Yuan Chang
• 来源期刊: 无线工程与技术(英文)
• 学科: 工学
• 关键词: Gilbert Cell MIXER P1dB LINEARITY Noise FIGURE (NF) Conversion GAIN Isolation
• 年，卷（期）: 2013,（1）
• 页码范围: 1-4
• 页数: 4页
• 分类号: TN7

摘要

Mixers in the communication system provide the possibility of encoding and decoding radio-frequency EM waves with signals through the help of local oscillators. A mixer with capability of high conversion gain, good isolation, and good linearity is comparably appreciated. Extensively wide ranges of frequencies, from 5.0 to 18.0 GHz, are to be examined addressing the promising functions of mixers in this study. A TSMC 0.18 μm CMOS model implanted in Agilent ADS is used for the circuit designs. Generated from Gilbert Cell Mixer, the modified circuits take advantage of extra active and passive devices to optimize the conversion gains. Characteristics of high conversion gain over 20 dB or even higher (as high as 29.842 dB at -40 mW RF power at working frequency 6 GHz) and low noise figures (NF) are shown.