Title :
Method for calculating the transmission loss of a radio-wave-shielding wall
Author :
Kasashima, Yoshinori ; Yamaki, Katsunori
Author_Institution :
Kajima Corp., Tokyo, Japan
Abstract :
Radiowave-shielding walls and floors made entirely of high-dielectric-loss material are being developed. It is necessary to determine the theoretical shielding characteristics of a shielding wall that requires a certain thickness. However it has previously been impossible to easily analyze walls composed of several layers and reinforcing meshes by an impedance method. Using equivalent distributed constant circuits and equivalent two-port networks, the authors have analyzed the characteristics of a radio-wave-shielding wall having an arbitrary number of material layers to an arbitrary polarization and radio frequency wave. As a result, they have derived expressions for theoretically calculating radio wave transmission loss of a wall. This paper describes the analytical method and a calculation example of a shielding wall developed by the authors´ company.
Keywords :
electromagnetic compatibility; electromagnetic shielding; equivalent circuits; radiowave propagation; two-port networks; EMC; equivalent distributed constant circuits; equivalent two-port networks; high-dielectric-loss material; radio wave transmission loss; radiowave-shielding wall; shielding characteristics; transmission loss calculation method; Analytical models; Building materials; Circuits; Concrete; Dielectric materials; Floors; Permittivity; Polarization; Propagation losses; Wireless LAN;
Conference_Titel :
Electromagnetic Compatibility, 2002. EMC 2002. IEEE International Symposium on
Conference_Location :
Minneapolis, MN, USA
Print_ISBN :
0-7803-7264-6
DOI :
10.1109/ISEMC.2002.1032477