Electromagnetic Stability Characterization of Millimeter-Wave Dielectric Fibers at Extremely High-Temperatures: Enabling Harsh Environment Communication and Sensing

The emergence of space exploration and hypersonic platforms necessitates the development of sophisticated electronics, communication systems, and sensors that can endure prolonged periods of stable functioning in challenging conditions, including extreme temperatures surpassing 500°C. This paper investigates the characteristics of electromagnetic wave propagation in dielectric fibers within the frequency range of 50-60 GHz under extreme heat. Our preliminary findings show stable signal transmission under prolonged exposure to heat at a specific temperature. Additionally, temperature variation affects the transmission, resulting in a 2 dB deviation for Teflon and quartz fiber, whereas the deviation in alumina fiber is approximately 4 dB. This study presents a first look into the potential utilization of dielectric fibers for communication and sensing in harsh environmental conditions. Perspectives on future research in this challenging yet promising field are also discussed.