Effects of Thickness of the Base Layer on the Electromagnetic Absorption in Heating Mortar Blocks for Snow Melting through Quasi Microwave

摘要

Heating mortar block system for melting snow utilizes electromagnetic waves of frequency 2.45 GHz and this system has a feature of quick snow removal and maintainability compared with conventional ways to remove snow. In this study, the influence of Base layer thickness on the capability of electromagnetic waves absorption was clarified and the efficiency of heating mortar block system through electromagnetic waves is improved. The followings are obtained. (1) Thickness of the base layer of sand mortar causes prominent electromagnetic waves absorption at specific frequency (hereinafter called “peak”) with periodicity. (2) It is possible to adjust the thickness of heating mortar blocks to have a peak. (3) The heating capability should be evaluated by the return loss when the sand mortar is placed under the slag mortar. [This paper is the extended version of Ito et al. (2017)].