研究目的
To offer an advanced near-field measurement technique for the robust assessment of 5G mobile device performance, focusing on the spatial vector evaluation of both electric E and magnetic H fields through their interaction.
研究成果
The two-probe method provides a comprehensive and detailed description of field behavior over a device under test, outlining areas of back-propagation and resonance. It offers a robust understanding of beam formation in the near field, aiding in the optimization of antenna design and MPE safety assessment.
研究不足
The study focuses on a specific frequency (28 GHz) and a passive test sample, which may not cover all scenarios in 5G applications. The complexity of field distributions in the near-field zone requires precise probe positioning and advanced data analysis techniques.
1：Experimental Design and Method Selection:
The study employs a two-probe method based on the Poynting vector theorem for measuring electric E- and magnetic H-field magnitudes in the reactive near-field zone.
2：Sample Selection and Data Sources:
A passive test sample operating at 28 GHz was evaluated for both electric E and magnetic H field distributions.
3：List of Experimental Equipment and Materials:
Aprel low Q antenna probes, EM-ISight automated near-field measurement system, vector network analyser, and real-time spectrum analyser.
4：Experimental Procedures and Operational Workflow:
Near-field E and H antenna probes were rotated every 15 degrees at each point within a 20 mm by 20 mm scan grid at a distance of 1 mm from the device under test.
5：Data Analysis Methods:
The RF-ISight analytical toolbox was used for data post-processing to calculate power density, considering both isotropic and directional distributions.
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