白井研究室の研究業績 2025年度(令和7年度)

（2025年4月1日-2026年3月31日）

1. 論文 等
   1. 2025.4.1; C. M. Bui and H. Shirai, ``High Frequency Plane Wave Scattering Analysis by Large Buildings with Multiple Windows," IEICE Trans. Electron., Vol. E108-C, No. 4, pp.179-188, April 2025.
      [Abstract] In this study, the scattering fields by multi-window buildings have been analyzed by using the Kirchhoff approximation method. The scattering fields are obtained by the radiation integrals due to the equivalent current sources excited by the incident plane wave on the exterior of the building and the virtually closed window apertures. The fields in the window region are represented by rectangular waveguide modes, then the reflected fields from window glasses are also converted to the equivalent currents. The validity of our formulation has been confirmed by numerical comparison with the physical optics method and by measurements on scale models. Discussions have been made on the impact of window glass in the context of high-frequency wireless communications.
      DOI: 10.1587/transele.2024REP0001
   2. 2025.8.5; C. M. Bui and Hiroshi Shirai, ``Analysis of Vertically Polarized Plane Wave Scattering by Multi-story Buildings with Windows," Progress In Electromagnetics Research C, Vol. 158, pp. 131-137, 2025.
      [Abstract] An analysis of electromagnetic scattering by multi-story, multi-window buildings is presented by utilizing the Kirchhoff Approximation method. This investigation specifically analyzes scattering characteristics for vertically polarized incident plane waves. Scattering fields are calculated via radiation integrals associated with equivalent current sources induced on the building’s exterior and across virtually closed window apertures by the incident wave. Fields within window regions are represented using rectangular waveguide modes, enabling the conversion of reflected fields from window glass into equivalent currents. The formulation’s validity is established through comparisons with the physical optics method and scale model measurements. Discussions address the influence of window glass and polarization on wave propagation in wireless communication scenarios like 4G LTE operating at 700 MHz.
      DOI: 10.2528/PIERC2505301
   
   
2. 国際会議発表 等
   1. 2025.6.26; H. Shirai and D. M. Nguyen, ``Physical Optics Approximation for Dielectric Wedge Diffraction," Proc. of the 25th edition of 2025 International Symposium on Electromagnetic Theory URSI Commission B, Bologna, Italy.
      DOI: 10.1109/ICEAA61917.2024.10701892
   2. 2025.7.17; C. M. Bui and H. Shirai, ``High Frequency Scattering Analysis of Vertically Polarized Plane Wave by Multi-Story Buildings," Proc. of 2025 IEEE International Symposium on Antennas & Propagation and North American Radio Science Meeting, Ottawa, Canada.
   3. 2025.9.8; H. Shirai and D. M. Nguyen, ``Comparison of the Edge Diffraction Coefficients for Dielectric Wedges," To be presented at the 26th edition of the International Conference on Electromagnetics in Advanced Applications (ICEAA 2025), Palermo, Italy.
   4. 2025.10.28; R. Sato and H. Shirai, ``Fundamental Study on Electromagnetic Plane Wave Scattering by a Thick Slit and a Rectangular Trough on the Back Side of a Conducting Plate," To be presented at the International Symposium on Antennas and propagation (ISAP 2025), Fukuoka Japan.
   5. 2025.10.28; H. Shirai and C. M. Bui, ``High-Frequency Electromagnetic Wave Scattering Analysis by a Multi-Story Building with Windows," To be presented at the 9th IEEE Radio International International Conference, Mauritius.
   
   
3. 国内学会, 研究会発表 等
4. 博士論文
   
5. 修士論文
   
6. 卒業論文
   
7. その他