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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| RCC, WBS, SAT, MICT | 2022-05-25 14:55 |
Online | Online | Design of electromagnetic scattering wall for improvement of wireless communications quality at 28 GHz Yasutaka Murakami (UEC), Jerdvisanop Chakarothai, Lira Hamada, Katsumi Fujii (NICT)  WBS2022-5 RCC2022-5 SAT2022-5 MICT2022-5 |
5G wireless communications use electromagnetic (EM) waves in 28 GHz band. In this frequency band, high-directivity (gain... [more] | WBS2022-5 RCC2022-5 SAT2022-5 MICT2022-5 pp.18-21 |
| AP, SANE, SAT (Joint) |
2018-07-20 11:10 |
Hokkaido | Hokkaido Univ. | Modified Calibration Technique of Distance Property for Electric Field Intensity Radiated by Small Dipole Antenna Operated in Solution Nozomu Ishii (Niigata Univ.), Chakarothai Jerdvisanop, Kanako Wake, Lira Hamada, Soichi Watanabe (NICT) AP2018-62 SANE2018-26 SAT2018-21 |
The authors have determined the transmit antenna factor of a reference dipole antenna as a function of the distance by t... [more] | AP2018-62 SANE2018-26 SAT2018-21 pp.119-124(AP), pp.25-30(SANE), pp.61-66(SAT) |
| AP (2nd) |
2017-05-26 10:40 |
Okinawa | Yonaguni Island, Kubura multipurpose meeting place (AMT) | 3D measurement of power transmission coefficient between small dipole antennas in saline solution in MHz band Nozomu Ishii (Niigata Univ.), Yu-Wei Guo (Niigata Univ./Taiwan Univ. Sci. Tech.), Chakarothai Jerdvisanop, Kanako Wake, Lira Hamada, Soichi Watanabe (NICT) |
To calibrate the probe for measuring SAR (specific absorption rate) values of the wireless devices operated in the MHz b... [more] | |
| AP, MW (Joint) |
2016-09-15 11:00 |
Ibaraki | AIST | Proposal and Numerical Simulation of Calibration Technique of Distance Property for Electric Field Intensity Radiated by Small Dipole Antenna Operated in Solution Nozomu Ishii (Niigata Univ.), Lira Hamada, Chakarothai Jerdvisanop, Kanako Wake, Soichi Watanabe (NICT) AP2016-91 |
(To be available after the conference date) [more] | AP2016-91 pp.19-24 |
| AP, SAT, SANE (Joint) |
2016-07-21 13:50 |
Hokkaido | Otaru port marina | Expansion of Electromagnetic Field and Near-Field Gain in Lossy Homogeneous Medium Nozomu Ishii (Niigata Univ.), Lira Hamada, Chakarothai Jerdvisanop, Kanako Wake, Soichi Watanabe (NICT) AP2016-49 |
To evaluate SAR of RF devices operated in MHz band, the authors have studied a technique that uses near-field gain of re... [more] | AP2016-49 pp.73-78 |
| EMCJ, EMD | 2016-07-15 14:55 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | An Investigation on SAR Measurement Method for MHz-Band Wireless Power Transfer Systems Satoshi Shimoyama (TUAT), Jerdvisanop Chakarothai, Kanako Wake, Lira Hamada (NICT), Takuji Arima, Toru Uno (TUAT), Soichi Watanabe (NICT) EMCJ2016-46 EMD2016-19 |
In this paper, we construct a measurement system and propose an experiment-based evaluation method for assessing specifi... [more] | EMCJ2016-46 EMD2016-19 pp.13-18 |
| EMCJ | 2015-11-13 11:25 |
Kanagawa | Mitsubishi Electric Corporation | Specific Absorption Rate Measurement for Base Station Antennas Takahiro Iyama, Teruo Onishi, Yoshiaki Tarusawa (NTT DOCOMO), Lira Hamada, Soichi Watanabe (NICT) EMCJ2015-83 |
The SAR (Specific Absorption Rate) measurement procedure is mainly used for mobile handsets and so on. Applicability of ... [more] | EMCJ2015-83 pp.13-17 |
| MW, AP (Joint) |
2015-09-18 10:20 |
Tochigi | Oyama National College of Tech. | Effects of Liquid Absorption of Covering Material for Loop Antennas Immersed in Liquid Nozomu Ishii (Niigata Univ./NICT), Satsuki Tsuruma (Niigata Univ.), Lira Hamada, Soichi Watanabe (NICT) AP2015-87 |
Antennas operated in the liquid are generally coated by dielectric material in order to reduce the attenuation due to di... [more] | AP2015-87 pp.43-48 |
| EMCJ | 2015-04-28 13:05 |
Tochigi | Utsunomiya Univ. | Measurement System Validation for Specific Absorption Rate of Mobile Wireless Device
-- Design of the Reference Antenna for the System Validation -- Lira Hamada, Soichi Watanabe (NICT), Jianqing Wang (NIT), Masaharu Takahashi (Chiba Univ.), Yoshitsugu Kamimura (Utsunomiya Univ.), Nozomu Ishii (Niigata Univ.), Teruo Onishi (NTT DOCOMO) EMCJ2015-1 |
The SAR reference values by standard dipole antennas for the performance validation of the measurement equipment are des... [more] | EMCJ2015-1 pp.1-4 |
| AP (2nd) |
2015-01-08 10:35 |
Overseas | PTIT, Ho Chi Minh City, Vietnam | [Invited Talk]
Simulation of Near-Field Gain for Circular Folded Loop Antennas in Liquid Nozomu Ishii (NICT/Niigata Univ.), Lira Hamada, Soichi Watanabe (NICT) |
[more] | |
| AP (2nd) |
2014-12-19 10:20 |
Kagoshima | Tanegashima Space Center | A Consideration of Far-Field Gain Estimation of Antennas Operated in Liquid by Using Phase Center Nozomu Ishii (Niigata Univ.), Katsushige Harima, Lira Hamada, Soichi Watanabe (NICT) |
[more] | |
| AP, SANE (Joint) |
2014-08-29 12:40 |
Niigata | Niigata University Satellite campus | [Tutorial Lecture]
Gain Measurement of Antennas Immersed in Solutions Nozomu Ishii (Niigata Univ.), Lira Hamada, Soichi Watanabe (NICT) AP2014-85 |
The effective wavelength in the solution, becomes shorter than free space, but it is not able to ignore the loss due to ... [more] | AP2014-85 pp.73-78 |
| AP (2nd) |
2014-06-27 10:25 |
Ibaraki | AIST | Far-Field Gain Estimation of Antennas Operated in Liquid by Considering Phase Centers Nozomu Ishii (NICT/Niigata Univ.), Lira Hamada, Soichi Watanabe (NICT) |
[more] | |
| AP (2nd) |
2014-01-08 15:00 |
Overseas | Le Quy Don Technical University (Hanoi, Vietnam) | A Simple Technique to Measure Specific Absorption Rate of Multiple Antenna Transmitting Systems Using Scalar E-field Probes
-- Case Study for Two-Element Array Antenna -- Dinh Thanh Le, Lira Hamada, Soichi Watanabe (NICT), Teruo Onishi (NTT DOCOMO) |
This paper presents a new technique to measure Specific Absorption Rate (SAR) of a multiple antenna transmitting system ... [more] | |
| EMCJ (2nd) |
2012-11-29 09:10 |
Tokyo | NICT | Electric Field Measurements for MIMO Wireless Communication Transmitters in Electromagnetic Exposure Evaluation Dinh Thanh Le (NICT), Takahiro Iyama (NTT DOCOMO), Lira Hamada, Soichi Watanabe (NICT), Teruo Onishi (NTT DOCOMO) |
This paper presents a calculation on averaging time in electric field measurements in electromagnetic exposure evaluatio... [more] | |
| AP | 2012-04-19 09:40 |
Miyagi | Tohoku Univ. | A modification of a SAR-probe calibration system using a reference waveguide in the tissue-equivalent liquid Nozomu Ishii (Niigata Univ./NICT), Lira Hamada, Soichi Watanabe (NICT) AP2012-1 |
In the standard system of evaluating SAR (specific absorption rate) of radio equipments, a probe is used to measure the ... [more] | AP2012-1 pp.1-5 |
| EMCJ, ITE-BCT | 2012-03-16 10:30 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Uncertainty of specific absorption rate probe calibration using waveguide systems Lira Hamada, Soichi Watanabe, Katsumi Fujii, Yasushi Matsumoto (NICT) EMCJ2011-133 |
Since 2002, measurements of the SAR (Specific Absorption Rate) has been obligated in compliance tests for mobile communi... [more] | EMCJ2011-133 pp.19-23 |
| EMCJ, IEE-EMC | 2011-12-09 13:05 |
Aichi | Nagoya Inst. of Tech. | Improvement of a liquid type human-body equivalent phantom in VHF band Akira Ito, Takuji Arima (Tokyo of Univ Agri and Tech), Lira Hamada, Soichi Watanabe (NICT), Toru Uno (Tokyo of Univ Agri and Tech) EMCJ2011-103 |
In order to estimate an induced current of standing human at VHF frequency range, we propose a simple type human equiva... [more] | EMCJ2011-103 pp.53-58 |
| AP, MW (Joint) |
2010-09-09 13:30 |
Tokyo | Tokyo Inst. tech. | Electric Field Distribution Produced by a Waveguide Aperture in Homogeneous Lossy Medium Nozomu Ishii (Niigata Univ.), Ken-ichi Sato, Yukihiro Miyota (NTT-AT), Lira Hamada, Soichi Watanabe (NICT) AP2010-67 |
We focus on a novel calibration technique for an electric-field probe used in the standard evaluation of SAR (specific a... [more] | AP2010-67 pp.1-6 |
| EMCJ (2nd) |
2010-05-28 15:55 |
Miyagi | Cyberscience Center, Tohoku University | A Unified Phantom for the SAR Compliance Test of Mobile Phones Lira Hamada (NICT), Takahiro Iyama, Teruo Onishi (DOCOMO), Soichi Watanabe (NICT) |
[more] | |
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