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Study on Terahertz RCS Scaled Measurements for Metal Plates of Rough Surfaces

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Abstract

The technique of scaled measurements for radar cross sections (RCSs) is one of the important means to study the scattering characteristics of targets. Based on the electrodynamic similitude, the scaling relation works well for RCS scaled measurements in microwaves. However, in the terahertz (THz) region, due to the shortened wavelength, the contribution of the fine structure of the targets, such as surface roughness, cannot be ignored. This leads to the inconsistency of the electrodynamic similitude in the THz band. In this paper, segmented RCS scaling relation was proposed for THz RCS scaled measurements, which considered the randomness of surface roughness. The validity of the new scaling relation has been proved by both numerical simulation and measurement experiments. This work provides references for practicing RCS scaled measurements of targets with consideration of surface roughness in the THz spectrum.

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Funding

This research was funded by The National Natural Science Foundation of China, grant number [61871386] and [61971427].

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Authors and Affiliations

  1. College of Electronic Science and Technology, National University of Defense Technology, Changsha, 410073, China

    Shuang Pang, Yang Zeng, Qi Yang, Bin Deng & Hongqiang Wang

  2. College of Meteorology and Oceanography, National University of Defense Technology, Changsha, 410073, China

    Yang Zeng

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  1. Shuang Pang
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  2. Yang Zeng
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  3. Qi Yang
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  4. Bin Deng
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  5. Hongqiang Wang
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Correspondence to Yang Zeng.

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Pang, S., Zeng, Y., Yang, Q. et al. Study on Terahertz RCS Scaled Measurements for Metal Plates of Rough Surfaces. J Infrared Milli Terahz Waves 42, 813–827 (2021). https://doi.org/10.1007/s10762-021-00813-7

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  • DOI: https://doi.org/10.1007/s10762-021-00813-7

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