Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Takehiro Morioka"'
Autor:
Takehiro Morioka
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 70:1-10
Net power delivered to a device is one of the important quantities to obtain various free field parameters in the radio frequency band, such as electric field strength, and a reflectometer is one practical choice for the real-time net power measureme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31da00b4382b6011d120529c9edb3e18
https://doi.org/10.1109/tim.2021.3116290
https://doi.org/10.1109/tim.2021.3116290
Autor:
Takehiro Morioka
Publikováno v:
IEEE Transactions on Electromagnetic Compatibility. 62:2650-2660
The mixed-mode S -parameters have become widely used for transmission line measurements on printed circuit boards. In this article, the mixed-mode S -parameter measurement is applied to the site attenuation measurement using a pair of dipole antennas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f779ac823d3b098f6e2ecc3855560a22
https://doi.org/10.1109/temc.2020.2984245
https://doi.org/10.1109/temc.2020.2984245
Autor:
Takehiro Morioka
Publikováno v:
2020 Conference on Precision Electromagnetic Measurements (CPEM).
A scalar reflectometer is ordinarily used for the net power measurement flowing into a device. The two-step calibration procedure of the reflectometer is a practical choice to carry out reliable measurements. In the present paper, uncertainty associa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e45e1b78fc6db6b57f4ff5705920a7eb
https://doi.org/10.1109/cpem49742.2020.9191776
https://doi.org/10.1109/cpem49742.2020.9191776
Autor:
Takehiro Morioka, Kazuhiro Hirasawa
Publikováno v:
IEEE Transactions on Electromagnetic Compatibility. 56:246-258
The antenna factor (AF) above the ground plane changes with respect to the height and obtaining a height pattern of the AF with a sufficient resolution is time consuming. In this paper, a novel method is proposed to obtain an accurate AF at an arbitr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::335ed481e5685f07303692c5dec75834
https://doi.org/10.1109/temc.2013.2287192
https://doi.org/10.1109/temc.2013.2287192
Autor:
Takehiro Morioka
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 60:2709-2714
A transverse electromagnetic cell is often used as a standard field generator since the E-field strength can be predicted using a simple formula. However, the E-field of the cell varies with respect to the location, and the estimated E-field strength
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1349cb3b55955392e02674cd18dbc704
https://doi.org/10.1109/tim.2010.2095545
https://doi.org/10.1109/tim.2010.2095545
Autor:
Kazuhiro Hirasawa, Takehiro Morioka
Publikováno v:
IEEE Transactions on Electromagnetic Compatibility. 53:233-236
A new method is proposed to calculate the properly defined antenna factor (AF) of a dipole antenna including environmental and terminal conditions. The original definition of the AF can be easily obtained by combining 1) the numerical method to calcu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6777700fa669fc3063f844226c3310af
https://doi.org/10.1109/temc.2010.2051551
https://doi.org/10.1109/temc.2010.2051551
Publikováno v:
2013 IEEE International Symposium on Electromagnetic Compatibility.
A shortened dipole antenna is widely used in electromagnetic compatibility measurements. The antenna factor (AF) of an antenna is usually calibrated by comparing the known AF of the reference antenna. Although the transmitting antenna is located at a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9fc221e881dc2b40e96affc481b469ed
https://doi.org/10.1109/isemc.2013.6670453
https://doi.org/10.1109/isemc.2013.6670453
Autor:
Takehiro Morioka
Publikováno v:
2012 Conference on Precision electromagnetic Measurements.
An off-resonant antenna, such as a shortened dipole is widely used in electromagnetic compatibility measurements due to compactness. The antenna factor of the shorten dipole antenna is ordinary calibrated by comparing that of the standard antenna. Ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::04275e764a163f066eb9ca484c70f52b
https://doi.org/10.1109/cpem.2012.6251088
https://doi.org/10.1109/cpem.2012.6251088
Autor:
Takehiro Morioka
Publikováno v:
2011 IEEE International Symposium on Electromagnetic Compatibility.
A well-defined E-field is often generated in an anechoic chamber by using the gain of the transmitting antenna, and E-field probes are calibrated by applying that field. However, the gain at a finite separation is no longer the same as that in the fa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f246eb0d13ef29b735a307c997667263
https://doi.org/10.1109/isemc.2011.6038274
https://doi.org/10.1109/isemc.2011.6038274
Autor:
Takehiro Morioka, Kazuhiro Hirasawa
Publikováno v:
2010 IEEE International Symposium on Electromagnetic Compatibility.
Antenna characteristics, such as input impedance are considerably deviated from those in free space when another antenna is located in the vicinity of the antenna. This often causes system degradation problems. In the present paper, effects of a para
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2320bd96bffc9f41b53a70b8eff019b4
https://doi.org/10.1109/isemc.2010.5711315
https://doi.org/10.1109/isemc.2010.5711315