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Conference Paper
Attenuation Assessment for Unshielded Facilities Based on Inside-to-Outside Propagation
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- Authors
- Hyoung Chang Hee, Kwon Jong Hwa
- Issue Date
- 2026-04
- Citation
- European Conference on Antennas and Propagation (EuCAP) 2026, pp.1-5
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- This paper proposes and validates an inside-to-outside propagation method for assessing electromagnetic attenuation for unshielded facilities. Unshielded facilities, such as general buildings, are composed of heterogeneous materials and structural discontinuities. The proposed approach is based on the principle of electromagnetic reciprocity, positioning the transmitter inside the target space and the receiver externally. The validation was performed using a reconfigurable testbed emulating reinforced concrete and tempered glass windows. The reciprocal single-point method, utilizing a stirrer and directional antennas, was benchmarked against the multi-point spatial averaging method and the single-point method, as defined in the newly amended IEC 61000-4-23 standard. Results show strong consistency between the reciprocal inside-to-outside configuration and the standard outside-to-inside multi-point method. The mean electromagnetic attenuation obtained with the proposed method agrees with the multi-point baseline to within a practical tolerance. The proposed method enables reliable measurements with systems of limited dynamic range and easing onsite constraints.
- Keyword
- electromagnetic attenuation, unshielded facilities, inside-to-outside propagation, antennas
- KSP Keywords
- Directional Antenna, IEC 61000-4-2, Point method, Reinforced concrete, Reliable measurements, Strong consistency, Structural discontinuities, Target space, Tempered glass, averaging method, heterogeneous materials