ELECTROMAGNETIC LOG SHIELD FOR ROADS IDE APPLICATION

Tribovane, Bruno Alves

http://hdl.handle.net/10400.8/6875

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Authors

Tribovane, Bruno Alves

Advisor(s)

Caldeirinha, Rafael Ferreira da Silva

Abstract(s)

In this dissertation, a highly sustainable barrier made of circular section timber of low industrial processing, is presented. This wooden structure allows the control of electromagnetic (EM) spectrum by fine-tuning the barrier’s intrinsic parameters to shape shielding effectiveness (SE) in order to improve either EM shielding or transparency. An algorithm is developed in MATLAB to design and generate the desired structural geometry within a simulation environment (CST MW), with the implementation of surface roughness and bending on the trunks. Simulations are performed at the frequency range of 0.3 to 10 GHz with the parametrisations such as the spacing between centre of poles, radius and moisture content (MC). The proposed real scale barrier prototype is assembled in the anechoic chamber and measurements are then performed at different transmitter (TX) and receiver (RX) antenna angles with both vertical and horizontal polarisation to better understand this structure’s impact on radio propagation. From this work, it was demonstrated that the wooden barrier’s simulation and measurement results present a good agreement and how the shielding efficiency can be tailored by optimising the radius and spacing at frequencies of commercial interest.