Experimental and numerical studies on the receiving gain enhancement modulated by a sub-wavelength plasma layer

Fanrong KONG (孔繁荣); Qiuyue NIE (聂秋月); Guangye XU (徐广野); Xiaoning ZHANG (张晓宁); Shu LIN (林澍); Binhao JIANG (江滨浩)

doi:10.1088/2058-6272/aac430

Plasma Science and Technology > 2018 > 20(9): 95504-095504. > DOI: 10.1088/2058-6272/aac430

Fanrong KONG (孔繁荣), Qiuyue NIE (聂秋月), Guangye XU (徐广野), Xiaoning ZHANG (张晓宁), Shu LIN (林澍), Binhao JIANG (江滨浩). Experimental and numerical studies on the receiving gain enhancement modulated by a sub-wavelength plasma layer[J]. Plasma Science and Technology, 2018, 20(9): 95504-095504. DOI: 10.1088/2058-6272/aac430

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Experimental and numerical studies on the receiving gain enhancement modulated by a sub-wavelength plasma layer

1 School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, People’s Republic of China 2 Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin 150001, People’s Republic of China 3 School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China

Funds: This work has been supported by National Natural Science Foundation of China (Nos. 51577044 and 11605035).

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Received Date: April 21, 2018

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Abstract

Abstract

A novel technique based on sub-wavelength plasma structure effects on enhancement of RF communication signals on a receiving antenna is carried out in this paper in laboratory experiments and analyzed by corresponding numerical simulations. Considerable intensification on receiving signal gain up to ～10 dB in comparison with that without the plasma modulation is observed experimentally in ～1GHz RF band, with an effective enhancement bandwidth of ～340 MHz and the fractional bandwidth of ～34%. Then, the optimal modulation parameters of plasma are further studied by a numerical simulation. It is shown that the number density, the layer thickness, and the collision frequency of the plasma, as well as the relative distance between the plasma layer and antenna synergistically affect the modulation. Compared to the metallic antenna with the same overall dimension, the modulated antenna covered by the sub- wavelength plasma structure features higher receiving efficiency and lower radar cross section in the studied RF band. The mechanism of the reception enhancement is further revealed by analyzing characteristics of electromagnetic scattering and electric field distribution in the sub- wavelength plasma layer. The results then exhibit scientific significance and application potential of sub-wavelength plasma modulation on compact receiving antennas with higher performance and better feature of radar stealth.

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References (28)

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