Title :
Measurement of the Amplitude and Phase of FM Noise Currents on a Personal Computer Chassis
Author :
Marubashi, Masayuki ; Ogata, Asahi ; Fujii, Katsumi ; Matsumoto, Yasushi ; Sugiura, Akira
Author_Institution :
Res. Inst. of Electr. Commun., Tohoku Univ., Sendai
Abstract :
IT equipment mostly uses dithered clocks, radiating FM noise especially in the frequency range above 1 GHz. Investigations are carried out to measure the noise source current flows on a PC chassis. Since network analyzers are useless for measurement of FM noises, a six-port junction is developed and used with a pair of loop antennas. This instrument can display current flows of PC harmonic noises
Keywords :
amplitude modulation; loop antennas; microcomputers; noise; pulse frequency modulation; FM noise currents; IT equipment; amplitude modulation; loop antennas; personal computer chassis; phase modulation; six-port junction; Antenna measurements; Clocks; Current measurement; Frequency; Instruments; Microcomputers; Noise level; Noise measurement; Phase measurement; Phase noise;
Conference_Titel :
Environmental Electromagnetics, The 2006 4th Asia-Pacific Conference on
Conference_Location :
Dalian
Print_ISBN :
1-4244-0183-6
DOI :
10.1109/CEEM.2006.257940
