Noise optimization of a wideband capacitive shunt-shunt feedback LNA design suitable for software-defined radio

Author

Weststrate, Marnus ; Sinha, Saurabh

Author_Institution

Dept. of Electr., Electron. & Comput. Eng., Univ. of Pretoria, Tshwane, South Africa

fYear

2009

fDate

13-16 Dec. 2009

Firstpage

619

Lastpage

622

Abstract

Simultaneous optimization of both the noise figure and gain of a low noise amplifier employing capacitive shunt-shunt feedback and an LC-ladder input matching network is discussed. The amplifier operates from 800 MHz (below the GSM band) to well above the ultra-wideband and as such is suitable for software-defined radio implementations. An S₂₁ of 20 dB is obtained for a minimum noise figure of 2.1 dB reaching a maximum of 3.9 dB at 800 MHz and 18 GHz which are the cut-off frequencies. Power consumption is limited to only 12.75 mW.

Keywords

circuit noise; feedback amplifiers; low noise amplifiers; optimisation; software radio; LC-ladder input matching network; LNA design; frequency 18 GHz; frequency 800 MHz; gain 20 dB; low noise amplifier; noise figure 2.1 dB; noise figure 3.9 dB; noise optimization; power 12.75 mW; power consumption; software-defined radio; wideband capacitive shunt-shunt feedback; Broadband amplifiers; Cutoff frequency; Design optimization; Energy consumption; Feedback; GSM; Impedance matching; Low-noise amplifiers; Noise figure; Ultra wideband technology; LC-ladder filter; capacitive feedback; low noise amplifier; noise optimization; software-defined radio;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits, and Systems, 2009. ICECS 2009. 16th IEEE International Conference on

Conference_Location

Yasmine Hammamet

Print_ISBN

978-1-4244-5090-9

Electronic_ISBN

978-1-4244-5091-6

Type

conf

DOI

10.1109/ICECS.2009.5410859

Filename

5410859