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http://dx.doi.org/10.5515/JKIEES.2014.14.2.47

A High Gain and High Harmonic Rejection LNA Using High Q Series Resonance Technique for SDR Receiver  

Kim, Byungjoon (School of Electrical Engineering and Computer Science, Institute of New Media and Communications, Seoul National University)
Kim, Duksoo (School of Electrical Engineering and Computer Science, Institute of New Media and Communications, Seoul National University)
Nam, Sangwook (School of Electrical Engineering and Computer Science, Institute of New Media and Communications, Seoul National University)
Publication Information
Journal of electromagnetic engineering and science / v.14, no.2, 2014 , pp. 47-53 More about this Journal
Abstract
This paper presents a high gain and high harmonic rejection low-noise amplifier (LNA) for software-defined radio receiver. This LNA exploits the high quality factor (Q) series resonance technique. High Q series resonance can amplify the in-band signal voltage and attenuate the out-band signals. This is achieved by a source impedance transformation. This technique does not consume power and can easily support multiband operation. The chip is fabricated in a $0.13-{\mu}m$ CMOS. It supports four bands (640, 710, 830, and 1,070MHz). The measured forward gain ($S_{21}$) is between 12.1 and 17.4 dB and the noise figure is between 2.7 and 3.3 dB. The IIP3 measures between -5.7 and -10.8 dBm, and the third harmonic rejection ratios are more than 30 dB. The LNA consumes 9.6 mW from a 1.2-V supply.
Keywords
High Gain; High Harmonic Rejection; High Quality Factor Series Resonance; Impedance Transformation; SDR;
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