Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Fujio Amemiya"'
Publikováno v:
2022 International Symposium on Electromagnetic Compatibility – EMC Europe.
Publikováno v:
IEEE Transactions on Electromagnetic Compatibility. 61:73-81
In this study, we developed an immunity test system for wearable devices used for healthcare or assistance to people with disabilities. The immunity test system consists of a pseudo biosignal generator for generating various vital signals such as ele
Autor:
Kunihiro Osabe, Fujio Amemiya, Hidenori Muramatsu, Toshiki Shimasaki, Shinichi Okuyama, Nobuo Kuwabara
Publikováno v:
2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE.
Reproducibility of radiated disturbance measurements is influenced by the line impedance of the power source used for EUT. A VHF-LISN was proposed to solve this issue. A VHF-LISN can define line impedance so as to avoid such influences caused by diff
Autor:
Yoshiharu Akiyama, Fujio Amemiya, Osami Wada, Norihito Hirasawa, Kazuhiro Takaya, Akira Sugiura
Publikováno v:
IEEE Transactions on Electromagnetic Compatibility. 58:1526-1534
Theoretical and experimental investigations were carried out on the characteristics of the shunt-type asymmetric artificial network (AAN). The findings are as follows: 1) The theoretical formulas for the differential- and common-mode impedances as we
Publikováno v:
IEEE Transactions on Electromagnetic Compatibility. 56:903-911
Conducted asymmetric disturbances are measured at telecommunication ports of equipment under test using an asymmetric artificial network (AAN). Therefore, theoretical investigations are carried out to characterize an AAN with a mode-impedance matrix,
Autor:
Fujio Amemiya, Nobuo Kuwabara
Publikováno v:
IEICE Transactions on Communications. :1707-1714
Enclosures of electronic equipment are an important item to suppress the unwanted emissions from digital processing circuits. However, the shielding effect at high frequencies is decreased by slits and apertures of the enclosures. The method for eval
Publikováno v:
Electronics and Communications in Japan (Part I: Communications). 89:1-10
Site attenuation has been evaluated by means of a half-wave dipole antenna. Since this antenna type requires a size on the order of a half wavelength, it is not suitable for evaluation of small anechoic chambers. In this paper, a method of evaluation
Publikováno v:
2003 IEEE International Symposium on Electromagnetic Compatibility. 2:680-685
Spherical dipole antenna has been used to evaluate EMC performance because it can consider small dipole source. In this paper, site attenuation of spherical dipole antenna is calculated using wire grid model. It is also measured in semi-anechoic cham
Publikováno v:
Electronics and Communications in Japan (Part I: Communications). 77:39-48
Recently, with the diversification of electromagnetic compatibility (EMC) problems, the need for an electric field sensor to measure the electromagnetic pulses and the electric field near the equipment has increased greatly. An electric field sensor
Publikováno v:
Electronics and Communications in Japan (Part I: Communications). 77:66-76
Since most electromagnetic malfunctions are of high speed and of a passing nature, it is difficult to specify the cause. The objective of this paper is to propose a monitoring system which can detect the electromagnetic waves in the time domain when