Electromagnetic and Thermal Analysis of Coaxial Cable Connection Embedded in an Intelligent Wall

A joint thermal and electromagnetic analysis of a wall with a regular distribution of embedded coaxial cables is presented in the paper. The cables are aimed, for instance, at connecting regularly spaced antennas on both wall sides with the scope of reducing wall-penetration loss in mm-wave and sub-THz wireless systems, as proposed in a previous study. The present study reveals the trade-off between good electromagnetic transmission, that is proportional to cable density, and modern building's requirements for high thermal insulation, that degrades with it. The study eventually suggests the optimum cable density and materials' choice to satisfy both requirements in future low-energy buildings with intelligent, signal-transmissive walls.