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
2013 Wireless Engineering and Technology  
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.
more » ... 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. The last two columns of Table 1 show the encouraging conversion gains up to 18 GHz at RF_power = -40 mW and at RF_power = -20 mW. As compared to the previous work in [8] , the conversion gains can be even
doi:10.4236/wet.2013.41001 fatcat:lgbsc6elifgg3gmhi5ekungnbi