High-Resolution Power Density Measurement Technique in the Near-Field Accounting for Antenna/Body Coupling at Millimeter-Waves

Massinissa Ziane (1) , Maxim Zhadobov (1) , Ronan Sauleau (1)

1 IETR - Institut d'Électronique et des Technologies du numéRique

This letter introduces a technique for the power density (PD) pattern measurement in the near field taking into account the antenna/body coupling at millimeter waves (mmW). The proposed method employs a specifically designed structure reproducing the reflection coefficient from human skin. This structure is optimized to convert the absorbed PD into an infrared (IR) pattern, remotely recorded using a high-resolution IR camera for reconstruction of the PD distribution. As a validation example, numerical and experimental distributions are presented for a 4element patch antenna array and a conical horn antenna at 60 GHz. A very good agreement is demonstrated between simulations and measurements (correlation > 98%). The results suggest a strong potential of this technique for fast remote high-resolution PD measurements applied to characterization of wireless devices in vicinity of the human body.

Mots clés: Millimeter-wave measurements; antennas; tissue-equivalent models; power density; infrared thermography

Domaines: Sciences de l'ingénieur [physics]

Massinissa Ziane, Maxim Zhadobov, Ronan Sauleau. High-Resolution Power Density Measurement Technique in the Near-Field Accounting for Antenna/Body Coupling at Millimeter-Waves. IEEE Antennas and Wireless Propagation Letters, 2021, 20 (11), pp.2151-2155. ⟨10.1109/lawp.2021.3087019⟩. ⟨hal-03328820⟩