DocumentCode :
575318
Title :
A study on measurement method of near electric field noise from LED bulbs
Author :
Kasuga, Takashi ; Ohashi, Takumi ; Yamada, Syohei ; Inoue, Hiroshi
Author_Institution :
Dept. of Electr. & Electron. Eng., Nagano Nat. Coll. of Technol., Nagano, Japan
fYear :
2012
fDate :
20-23 Aug. 2012
Firstpage :
428
Lastpage :
432
Abstract :
Although the inverter circuit is used to make high efficiency of LED bulbs, the large electromagnetic noise radiated from the inverter circuit may influence to the radio communication system. Though near magnetic field noise from LED bulbs was not detected, near electric field was detected. The purpose of this study is to propose the measurement method of near electric field noise from LED bulbs by using monopole antenna. The calibration factor is obtained by a near field three antenna method. Alternatively, using two different length antennas, 1 to 400 MHz wideband measurement can be possible to use. Actually, characteristic near electric field is observed from 100 to 200 MHz. This result conformed to far electric field from LED bulbs, and it has correlate with near electric field. The cause of the large electric field radiation is the resonance power line.
Keywords :
LED lamps; calibration; electric field measurement; invertors; monopole antenna arrays; noise measurement; LED bulbs; calibration factor; electromagnetic noise; frequency 1 MHz to 400 MHz; inverter circuit; monopole antenna; near electric field noise measurement method; near field three antenna method; radio communication system; resonance power line; wideband measurement; Antenna measurements; Antennas; Electric fields; Electric variables measurement; Light emitting diodes; Noise; Noise measurement; LED bulbs; a near field three antenna method; monopole antenna; near electric field noise;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
SICE Annual Conference (SICE), 2012 Proceedings of
Conference_Location :
Akita
ISSN :
pending
Print_ISBN :
978-1-4673-2259-1
Type :
conf
Filename :
6318477
Link To Document :
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