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Determining Electromagnetic Energy Loss Through a Radio-Frequency Transmission Line by Infrared Thermal Imaging

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4 Author(s)
Atef Alnukari ; Institut de Recherche en Électrotechnique et Électronique de Nantes Atlantique, Ecole Polytechnique, Université de Nantes, Nantes Cedex 3, France ; Philippe Guillemet ; Yves Scudeller ; Serge Toutain

This paper presents a technique for measuring local electromagnetic energy loss through a transmission line by infrared thermal imaging. The technique offers an attractive route to investigate solid-state radio-frequency (RF) structures with different sizes and an arbitrary layout of lines by achieving an electromagnetic energy mapping over a wide frequency range between 300 MHz and 6 GHz. The measurement setup and the microstrip RF transmission line test device are described. An analytical model expressing the dissipated power profile as a function of signal frequency, transmission line features, and impedance mismatch is presented. Electromagnetic loss and temperature increase induced by dissipation are numerically studied. Experimental results are presented and discussed.

Published in:

IEEE Transactions on Instrumentation and Measurement  (Volume:60 ,  Issue: 2 )