A highly attenuative CMOS LNA at 5-6 GHz using negative GM circuit for UWB applications

Nischal Koirala, A. Anand, Ramesh K. Pokharel, H. Kanaya, K. Yoshida

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1 Citation (Scopus)


This paper presents a UWB low noise amplifier (LNA) for 3.1-10.6 GHz applications, with an excellent attenuation at 5-6 GHz for rejecting the wireless local area network (WLAN) interference. A method of canceling the on-chip inductive resistance has been employed in this work to make the inductor an extremely low loss inductor with a very high quality factor. The fully integrated UWB LNA is designed in the CMOS 0.18 μm Taiwan Semiconductor Manufacturing Company (TSMC) technology. Measurement results show that the LNA achieves attenuation of up to 39 dB at 5.4 GHz, while the 1 dB power gain is 10 dB. The measured return losses (S11 and S22) are better than -7.4 dB while the noise figure is 5-6.1 dB in the range of operation. The measured input P1dB and IIP3 measured at 6.5 GHz are -12.2 and 2 dBm, respectively. The designed LNA occupies an area of 1.105 × 0.68 mm2.

Original languageEnglish
Pages (from-to)894-899
Number of pages6
JournalMicrowave and Optical Technology Letters
Issue number4
Publication statusPublished - Apr 2013

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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