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Article Dans Une Revue IEEE Antennas and Wireless Propagation Letters Année : 2023

Near-Field Power Density Mapping of Close-to-Body Low-Power mmWave Devices

Résumé

This letter introduces a method for power density (PD) measurement of low-power millimeter-wave devices, accounting for antenna/body coupling. This technique employs a thin solid absorbing structure with equivalent scattering properties used to convert the absorbed power into a heat pattern measured by an infrared (IR) camera. The measured IR pattern is then used to reconstruct the PD distribution. The lock-in technique is used to enhance the signal-to-noise ratio. It consists in filtering the ambient IR noise as well as removing the parasitic heat conduction effect. The reduction of noise enables achieving a measurement sensitivity of the order of 1 mW/cm 2 , substantially overcoming the sensitivity without lock-in ( > 10 dB). The proposed approach is experimentally validated for a conical horn antenna at 60 GHz. For the first time, this study demonstrates the sensitivity of IR-based measurements sufficient enough to assess the compliance of medium- and low-power wireless devices above 6 GHz.
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Dates et versions

hal-04295505 , version 1 (20-11-2023)

Identifiants

Citer

Massinissa Ziane, Artem Boriskin, Maxim Zhadobov. Near-Field Power Density Mapping of Close-to-Body Low-Power mmWave Devices. IEEE Antennas and Wireless Propagation Letters, 2023, 22 (10), pp.2347-2351. ⟨10.1109/LAWP.2023.3286944⟩. ⟨hal-04295505⟩
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