https://doi.org/10.1051/epjconf/202532312005
New Structure for High-Sensitivity Coaxial Thermal Power Sensor in the Frequency Range from DC–50 GHz
Laboratoire National de Métrologie et d’Essais, 29 avenue Roger Hennequin, 78197 Trappes, France
* Corresponding author: doudou.ba@lne.fr
Published online: 7 April 2025
This paper presents the design and development of a new thermal microwave power sensor for a frequency range spanning from DC to 50 GHz. The purpose of this new design is to propose a high-sensitivity thermoelectric power sensor suitable for microcalorimeter application that is a primary method of microwave power calibration. The core structure of the power sensor comprises a Grounded Coplanar Waveguide (GCPW) transmission line, two load resistors, a thermopile, and output pads for DC measurements. The optimized power sensor demonstrates promising simulation performance, with a return loss better than 20 dB across the frequency range and an efficiency exceeding 80%. At 50 GHz, the sensitivity of the power sensor reaches well over 0.240 mV/mW.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
