白井研究室の研究業績
2018年度(平成30年度)


白井研究室で行われた研究のうち，論文等の形で学術論文誌等に公表されたものを紹介します.
  1. 著書
    1. 2019. 1. 18; 白井 宏, 「理工系の技術文書作成ガイド」, 126 p.,コロナ社
      ISBN:978-4-339-07820-6
      本書は、科学技術文書や技術論文、実験レポートの書きかたと発表のしかたについてまとめたものである。 科学技術文書は、数学の定理の証明のように、事実や論理の積み上げで作り上げ、誰が読んでも間違いなく 同じ結論に達するように書かなければならない。そのためには、どのように技術文書をまとめればよいか。 本書は、理工系の学生が悩む技術文書や技術論文、実験レポートの論理的な書きかたに、発表のしかたを含めて丁寧にまとめている。
  2. 論文 等
    1. 2018. 2. 20; H. B. Chu and H. Shirai, ``A Compact Metamaterial Quad-band Antenna Based on Asymmetric E-CRLH Unit Cell," Progress In Electromagnetics Research C, Vol. 81, pp. 171-179, 2018.
      DOI: 10.2528/PIERC17111605
      [Abstract] In this paper, a compact metamaterial quad-band antenna is presented. The antenna is designed from a unit cell of asymmetric extended-composite right/left handed transmission line (E- CRLH TL) as the main resonator part and a 50 Ω coplanar waveguide (CPW) as the feeding part. The design concept and resonant frequencies are analyzed and discussed. The results show that the proposed antenna exhibits four frequency bands covering GSM810, WLAN 2.45/5.5 GHz and WiMAX 3.5 GHz bands. The overall size of the fabricated antenna is only 57.2mm×31.2mm×1.6mm and is very small compared with other proposed quad-band antennas. In addition, a good agreement can be seen among the estimated resonant frequencies, HFSS simulated and measured results.
    2. 2018. 8. 1; H. N. Quang and H. Shirai, ``A New Interpretation of Physical Optics Approximation from Surface Equivalence Theorem," IEICE Trans. Electron., Vol.E101-C, No.8, pp. 664-670, 2018.
      DOI: 10.1587/transele.E101.C.664
      [Abstract] In this study, the electromagnetic scatterings from conducting bodies have been investigated via a surface equivalence theorem. When one formulates equivalent electric and magnetic currents from geometrical optics (GO) reflected field in the illuminated surface and GO incident field in the shadowed surface, it has been found that the asymptotically derived radiation fields are found to be the same as those formulated from physical optics (PO) approximation.
    3. 2019. 1. 1.; K. N. Nguyen and H. Shirai, ``Kirchhoff Approximation Analysis of Plane Wave Scattering by Conducting Thick Slits," IEICE Trans. Electron., Vol. 102-C, No. 1, pp. 12-20, Jan. 2019.
      DOI: 10.1587/transele.E102.C.12
      [Abstract] Kirchhoff approximation (KA) method has been applied to analyze the plane wave scattering by conducting thick slits. The scattering fields can be considered as field radiations from equivalent magnetic current sources assumed by closing the aperture of the slit. The obtained results are compared with those of other methods to validate the accuracy of the proposed formulation in different conditions of slit dimension.
    4. 2019. 1. 1.; H. N. Quang and H. Shirai, ``High Frequency Electromagnetic Scattering Analysis by Rectangular Cylinders -TM Polarization-," IEICE Trans. Electron., Vol. 102-C, No. 1, pp. 21-29, Jan. 2019.
      DOI: 10.1587/transele.E102.C.21
      [Abstract] In this study, transverse magnetic electromagnetic plane wave scatterings by rectangular cylinders have been analyzed by a high frequency asymptotic method. Scattering field can be generated by the equivalent electric and magnetic currents which are obtained approximately from the geometrical optics (GO) fields. Our formulation is found to be exactly the same with the physical optics (PO) for the conducting cylinders, and it can also be applicable for dielectric cylinders. Numerical calculations are made to compare the results with those by other methods, such as the geometrical theory of diffraction (GTD) and HFSS simulation. A good agreement has been observed to confirm the validity of our method.
    5. 2019.3.14; K. Li, K. Sasaki, S. Watanabe and H. Shirai, ``Relationship between power density and surface temperature elevation for human skin exposure to electromagnetic waves with oblique incidence angle from 6 GHz to 1 THz," Physics in Medicine and Biology, Vol.64.
      DOI: 10.1088/1361-6560/ab057a
      [Abstract] This study presents an investigation of human skin exposure to obliquely incident electromagnetic waves at frequencies from 6 GHz to 1 THz. We aim to clarify the relationship between the power density and the skin surface temperature elevation under various exposure conditions. A Monte Carlo simulation was conducted to assess the transmittance and surface temperature elevation considering the variation of skin tissue thickness. For the case of TM wave injection, transmittance increases with increasing incidence angle from the normal incidence because of the Brewster effect. The normal incidence is confirmed as the worst-case exposure condition when the incident power density is defined in an area normal to the propagation direction. In addition, we investigated the power density required to obtain the equivalent temperature elevation over the skin surface. The analysis shows that the incident power density defined in the direction normal to the skin surface may underestimate the temperature elevation when TM waves are incident over the normal incidence up to the maximum transmittance angle. Our results also show that the power density inside the skin surface strongly correlates with the surface temperature elevation but less dependent on the frequency and independent of the oblique incidence angle and polarization. The findings of this study are expected to be valuable for discussing how to use the different definitions of power density based on dosimetric characteristics as measures in safety guidelines to protect humans from excessive temperature elevation by millimeter and submillimeter-wave exposure.

  3. 国際会議発表 等
    1. 2018. 5. 28; R. Sato, A. Takatori, and H. Shirai, ``Proposal of Novel Reflection/Transmision Coefficient for Efficient Propagation Analysis at Outdoor-indoor Interface Environment," Proc. of 2nd URSI AT-RASC, CDROM, Gran Canaria, Spain.
    2. 2018. 7. 10; H. N. Quang and H. Shirai, ``High Frequency Wedge Diffraction Analysis via Surface Equivalence Theorem," Proc. of 2018 IEEE International Symposium on Antennas and Propagation (APS/URSI 2018), CDROM, Boston, USA.
      DOI: 10.1109/APUSNCURSINRSM.2018.8608181
    3. 2018. 7. 19; K. N. Nguyen and H. Shirai, ``H-polarized Plane Wave Diffraction by Thick Conducting Slits," Proc. of 2018 IEEE International Conference on Communications and Electronics (ICCE 2018), pp. 433-436, Hue, Vietnam.
      DOI: 10.23919/PIERS.2018.8597857
    4. 2018. 8. 1; R. Sato and H. Shirai, ``Plane Wave Scattering from Two Cracks on Conducting Plane," Proc. of Progress in Electromagnetics Research Symposium (PIERS 2018), CDROM, Toyama, Japan.
    5. 2018. 8. 2; H. Shirai, ``Diffraction Study with Prof. Kohei Hongo," Proc. of 2018 Progress in Electromagnetics Research Symposium (PIERS 2018), CDROM Toyama, Japan.
    6. 2018. 8. 2; H. N. Quang and H. Shirai, ``High Frequency Scattering from Conducting Rectangular Cylinder via Surface Equivalence Theorem," Proc. of 2018 Progress in Electromagnetics Research Symposium (PIERS 2018), CDROM, Toyama, Japan.
      DOI: 10.23919/PIERS.2018.8598065
    7. 2018. 8. 2; K. N. Nguyen and H. Shirai, ``H-polarized Plane Wave Diffraction by Thick Conducting Slits," Proc. of 2018 Progress in Electromagnetics Research Symposium (PIERS 2018), CDROM, Toyama, Japan.
      DOI: 10.23919/PIERS.2018.8597857
    8. 2018. 8. 3; R. Sato and H. Shirai, ``Reflection and Transmission Features of Scattered Field from Multi-layered Window Glass in High Frequency Band," Proc. of 2018 Progress in Electromagnetics Research Symposium (PIERS 2018), CDROM Toyama, Japan.
    9. 2018. 9. 10; H. Shirai, M. Shimizu, and R. Sato, ``EM Wave Scattering by a Window on a Wall," Proc. of 2018 International Conference on Electromagnetics and Advanced Applications, CDROM, Cartagena de Indias, Columbia.
      DOI: 10.1109/ICEAA.2018.8520373
    10. 2018. 10. 25; K. N. Nguyen and H. Shirai, ``Electromagnetic Plane Wave Diffraction by Thick Conducting Slits -E Polarization Case-," Proc. of 2018 International Symposium on Antennas and Propagation (ISAP 2018), CDROM, Busan, Korea.

  4. 学会, 研究会発表 等
    1. 2018. 11.16; K. N. Nguyen and H. Shirai, ``Plane Wave Diffraction by Loaded Slit in a Thick Conducting Screen," IEICE Technical Report on Electromagnetic Theory (EMT), EMT2018-52, pp. 65-70, Tottori, Japan.
    2. 2018. 11.16; H. N. Quang and H. Shirai, ``High Frequency Scattering from Dielectric Rectangular Cylinders -TE Polarization-," IEICE Technical Report on Electromagnetic Theory (EMT), EMT2018-50, pp. 53-58, Tottori, Japan.

  5. 博士論文
    1. 2019. 3. 24; H. N. Quang, ``High Frequency Scattering Analysis by Dielectric Edged Objects via Surface Equivalence Theorem," 博士論文, 中央大学 理工学研究科.

  6. 修士論文
    1. 2019. 3. 24; 曲谷 慧， ``RCS測定のための正確な校正方法の検討," 修士論文，中央大学 理工学研究科．

  7. 卒業論文
    1. 2019.3.24; 池内 未蘭，西谷 雄太， ``人体モデル形状の違いが車内の放射電磁波に及ぼす影響," 卒業論文，中央大学 理工学部 電気電子情報通信工学科．
    2. 2019.3.24; 青木 恒人，安部 祐太朗， ``ハンディサーチを用いたレンガ層の厚さ推定," 卒業論文，中央大学 理工学部 電気電子情報通信工学科．
    3. 2019.3.24; 木村 晴周， ``建物材質が通りに沿った電波伝搬に及ぼす影響について," 卒業論文，中央大学 理工学部 電気電子情報通信工学科．
    4. 2019.3.24; 高橋 良輔， ``中空パイプ内の金属角柱の検出について," 卒業論文，中央大学 理工学部 電気電子情報通信工学科．
    5. 2019.3.24; 只野 優介，矢澤 直希， ``RCS値を用いた柱上散乱体の誘電率と形状推定の精度についての検討," 卒業論文，中央大学 理工学部 電気電子情報通信工学科．

  8. その他