Title :
Experimental study of the noise phenomena in microwave components
Author :
Ivanov, E.N. ; Tobar, M.E. ; Woode, R.A.
Author_Institution :
Dept. of Phys., Western Australia Univ., Nedlands, WA, Australia
Abstract :
A novel measurement system with thermal noise limited sensitivity has been developed for studying the fluctuations in passive microwave components. The developed system is capable of measuring the noise in the quietest microwave components in real time. The noise floor of a 9 GHz measurement system was measured to be -193 dB/Hz at offset frequencies above 1 kHz. We present the measurements of the phase and amplitude noise in precision voltage controlled phase shifters and attenuators, along with the first reliable experimental evidences regarding the intrinsic phase noise in microwave isolators. Also we discuss the possible applications of the developed noise measurement system for noise reduction in the microwave amplifiers and oscillators
Keywords :
electric noise measurement; electron device noise; fluctuations; microwave devices; microwave isolators; microwave measurement; microwave phase shifters; phase noise; 9 GHz; amplitude noise; attenuators; fluctuations; measurement system; microwave isolators; noise phenomena; noise reduction; passive microwave components; phase noise; thermal noise limited sensitivity; voltage controlled phase shifters; Attenuation measurement; Fluctuations; Frequency measurement; Microwave measurements; Noise level; Noise measurement; Phase measurement; Phase noise; Real time systems; Voltage control;
Conference_Titel :
Frequency Control Symposium, 1996. 50th., Proceedings of the 1996 IEEE International.
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-3309-8
DOI :
10.1109/FREQ.1996.560267
