| Citation: |
Ni Ronghua, Tan Xi, Tang Zhangwen, Min Hao. Analysis and Design of a Quadrature Down-Conversion Mixerfor UHF RFID Readers[J]. Journal of Semiconductors, 2008, In Press.
Ni R H, Tan X, Tang Z W, Min H. Analysis and Design of a Quadrature Down-Conversion Mixerfor UHF RFID Readers[J]. J. Semicond., 2008, 29(6): 1128.
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Analysis and Design of a Quadrature Down-Conversion Mixerfor UHF RFID Readers
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Abstract
A quadrature mixer with a shared transconductor stage is analyzed,including voltage conversion gain,linearity,noise figure,and image rejection.The analysis indicates it has better performance than a conventional Gilbert mixer pair in commutating mode.A quadrature down-conversion mixer based on this topology is designed and optimized for an ultra high frequency RFID reader.Operating in the 915MHz ISM band,the presented quadrature mixer measures a conversion gain of 12.5dB,an IIP3 of 10dBm,an IIP2 of 58dBm,and an SSB noise figure of 17.6dB.The chip was fabricated in a 0.18μm 1P6M RF CMOS process and consumes only 3mA of current from a 1.8V power supply. -
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