Title :
Study of PM Noise and Noise Figure in Low Noise Amplifiers Working under Small and Large Signal Conditions
Author :
Garmendia, N. ; Portilla, J.
Author_Institution :
Basque Country Univ., Bilbao
Abstract :
A study of the noise performance of low noise amplifiers (LNAs) working under different operating regimes is presented. The LNAs have been characterized through the measurement of phase modulation (PM) noise power spectral density as a function of carrier power level. The degradation of the amplifier noise figure (NF) due to input power is obtained from the residual PM white noise. Measurements show that the LNA NF can increase dramatically with the gain compression level. The growth of NF in nonlinear operating conditions can be explained due to the gain compression itself and the increasing level of the internal noise added by the amplifier. The flicker PM noise behavior introduced by the amplifier is also discussed.
Keywords :
flicker noise; low noise amplifiers; phase modulation; phase noise; white noise; LNA; amplifier noise figure; flicker PM noise; gain compression; large signal conditions; low noise amplifier; nonlinear operating condition; phase modulation noise; power spectral density; small signal conditions; white noise; 1f noise; Density measurement; Low-noise amplifiers; Noise figure; Noise level; Noise measurement; Phase measurement; Phase modulation; Phase noise; Power measurement; Nonlinear noise; additive noise; low noise amplifier; noise figure; noise measurements; phase modulation noise;
Conference_Titel :
Microwave Symposium, 2007. IEEE/MTT-S International
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0688-9
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2007.380300
