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http://dx.doi.org/10.5515/KJKIEES.2011.22.2.214

Design of Multi-Band Low Noise Amplifier Using Switching Transistors for 2.4/3.5/5.2 GHz Band  

Ahn, Young-Bin (Department of Computer and Radio Communication Engineering, Korea University)
Jeong, Ji-Chai (Department of Brain and Cognitive Engineering, Korea University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.22, no.2, 2011 , pp. 214-219 More about this Journal
Abstract
This paper presents a multi-band low noise amplifier(LNA) with switching operation for 2.4, 3.5 and 5.2 GHz bands using CMOS 0.18 um technology. The proposed circuit uses switching transistors to achieve the input and output matching for multi-band. By using the switching transistors, we can adjust the transconductance, gate inductance and gatesource capacitance at input stage and total output capacitance at output stage. The proposed LNA exhibits gain of 14.2, 12 and 11 dB and noise figure(NF) of 3, 2.9 and 2.8 dB for 2.4, 3.5 and 5.2 GHz, respectively.
Keywords
LNA; Multi-Band; Switching Transistor; In/Output Matching;
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