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A 3.1~10.6 GHz UWB Low Noise Amplifier

The main contents of this thesis are improving a UWB LNA, and analyze the input-matching, the noise, and the gain.
First we increase the width of the input transistor, and remove source-degeneration inductor. Those ways can increase the gain and reduce the noise of the circuit. In the input matching, we use a shunt capacitor, a series inductor, and the impedance of the transistor itself to achieve high frequency matching. The lower frequency matching is achieved by negative feedback resistor.
The UWB LNA dissipates 10.14 mW power and achieves input return loss (S11) below -11.5 dB, output return loss (S22) below -11.9 dB, forward gain (S21) of 14.4¡Ó0.4 dB, reverse isolation (S12) below -26.7 dB, and noise figure (NF) of 2.6~3.5 dB over the 3.1~10.6 GHz band of interest. 1-dB compression point (P1dB) of -16.8 dBm and input third-order inter-modulation point (IIP3) of -8.1 dBm are achieved at 6.85 GHz.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0727111-143043
Date27 July 2011
CreatorsHsieh, Yi-Lung
ContributorsKo-Chi Kuo, Chia-Hsiung Kao, Tzyy-Sheng Horng
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageEnglish
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727111-143043
Rightsrestricted, Copyright information available at source archive

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