Year: 2024
Type: article
Abstract: Measuring the near-field emitted by an antenna is essential for diagnosing its proper functioning and identifying any manufacturing defects. Unlike scanning systems that incrementally move a point sensor, electromagnetic (EM) field thermography enables rapid mapping of a surface in just a few seconds. Developed at Office National d’Études et Recherches Aérospatiales (ONERA) under the name EMIR, infrared (IR) thermography involves heating a thin film with EM radiation. An IR camera measures this heating, which is proportional to the EM power density, thereby revealing the field amplitude. More recently, a new thermography technique derived from EMIR has been introduced. This method involves coating the thin film with a fluorophore. The fluorescence intensity, which depends on temperature and thus on the field, allows for mapping of the EM field using a simple optical camera. Following a brief introduction to this method, we present its application to the measurement of a fractal antenna, which has also been numerically simulated.
Authors: Raphaël Flor, Stéphane Fauré, Jean-François Bobo, Daniel Prost
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4404681162