Mixers of Ultra-High Gain from 5.0 to 18.0 GHz

Hsin-Chia Yang, Jui-Ming Tsai, Cheng-Huang Tsao, Mu-Chun Wang, Sungching Chi, Tsin-Yuan Chang

Department of Electrical Engineering, National Tsing-Hua University, Hsin-Chu City, Chinese Taipei.
Department of Electronics Engineering, Ming Hsin University of Science and Technology, Hsin-Chu City, Chinese Taipei.

DOI: 10.4236/wet.2013.41001                

Abstract

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.

 

Keywords

Gilbert Cell Mixer; P1dB; Linearity; Noise Figure (NF); Conversion Gain; Isolation

Conflicts of Interest

The authors declare no conflicts of interest.

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