Title :
Noise measurements beyond the standard thermal noise limit
Author :
Ivanov, Eugene N. ; Tobar, Michael E.
Author_Institution :
Sch. of Phys., Univ. of Western Australia, Crawley, WA
Abstract :
We demonstrated the possibility of "real time" noise measurements at microwave frequencies with spectral resolution ~ 8 dB below the standard thermal noise limit. This was achieved by combining the principles of microwave circuit interferometry with signal recycling and minimizing the influence of various technical noise sources on the measurement processes.
Keywords :
electric noise measurement; microwave measurement; radiowave interferometry; thermal noise; microwave circuit interferometry; microwave frequencies; real time noise measurements; signal recycling; spectral resolution; standard thermal noise limitation; technical noise sources; Circuit noise; Interferometry; Measurement standards; Microwave circuits; Microwave frequencies; Microwave measurements; Noise measurement; Recycling; Signal processing; Signal resolution;
Conference_Titel :
Frequency Control Symposium, 2008 IEEE International
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-1794-0
Electronic_ISBN :
1075-6787
DOI :
10.1109/FREQ.2008.4622960
