Title :
Analysis and Simulation of Balanced Low Noise Amplifier
Author :
Guoying Sun ; Jingfu Bao
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu
Abstract :
We give an analysis of balanced low noise amplifier (LNA) which has good voltage standing wave ratio (VSWR) performance, higher linearity and good stability. A mathematic model of balanced LNA has been setup and an analysis of gain, noise figure (NF) and VSWR based on it is presented. According to analysis in time domain and simulation in advance design system (ADS), the unbalance of gain, NF and VSWR will affect the performance of the balanced LNA module. It gets a zero reflection on condition that its two branches totally balanced. 10 dB difference of gains causes NF increased by 1 dB.
Keywords :
circuit simulation; low noise amplifiers; advance design system; low noise amplifier; voltage standing wave ratio; zero reflection; Analytical models; Linearity; Low-noise amplifiers; Mathematical model; Mathematics; Noise measurement; Performance analysis; Signal to noise ratio; Stability analysis; Voltage;
Conference_Titel :
Testing and Diagnosis, 2009. ICTD 2009. IEEE Circuits and Systems International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-2587-7
DOI :
10.1109/CAS-ICTD.2009.4960781
