volume | PIER Journals

Abstract

Aiming at the focusing of near-field electromagnetic (EM) energy, a design approach of multi-type focusing (MTF) based on 1-bit metasurface is proposed in this paper. The surface electric field required for multi-focus is actually obtained by the superposition of the surface electric field of each single focus. This method can flexibly design the number, position, and energy distribution ratio of the focus according to the phase arrangement of the metasurface. Dipole structure is used as ``0'' and ``1'' unit of 1-bit metasurface. The phase difference of reflection is 180°, and the reflection coefficient is over 90% in 7.4-21.9 GHz. Using this 1-bit unit, the linear focus metasurface, multi-focus metasurface and metasurface generating two foci with different energy distribution are realized respectively. The energy distribution metasurface was manufactured and measured, and the measured results are consistent with the simulations. The design method used in this paper is simple and effective to realize multi-focus metasurface design and has potential application value in microwave imaging, radio frequency identification (RFID), and wireless power transmission.

1. Li, P., M. Lewin, A. V. Kretinin, et al. "Hyperbolic phonon-polaritons in boron nitride for near-field optical imaging," Nature Communications, Vol. 6, 7507, 2015.
doi:10.1038/ncomms8507 Google Scholar

2. Buffi, A., A. A. Serra, P. Nepa, et al. "A focused planar microstrip array for 2.4 GHz RFID readers," IEEE Transactions on Antennas and Propagation, Vol. 58, No. 5, 1536-1544, 2010.
doi:10.1109/TAP.2010.2044331 Google Scholar

3. Zhao, J., H. Ye, K. Huang, et al. "Manipulation of acoustic focusing with an active and configurable planar metasurface transducer," Scientific Reports, Vol. 4, 6257, 2013. Google Scholar

4. Grbic, A. and R. Merlin, "Near-field focusing plates and their design," IEEE Transactions on Antennas and Propagation, Vol. 56, No. 10, 3159-3165, 2008.
doi:10.1109/TAP.2008.929436 Google Scholar

5. Fennell, R. D., M. Sher, and W. Asghar, "Design, development, and performance comparison of wide field lensless and lens-based optical systems for point-of-care biological applications," Optics and Lasers in Engineering, Vol. 137, 106326, 2021.
doi:10.1016/j.optlaseng.2020.106326 Google Scholar

6. Bogosanovic, M. and A. G. Williamson, "Microstrip antenna array with a beam focused in the near-field zone for application in noncontact microwave industrial inspection," IEEE Transactions on Instrumentation and Measurement, Vol. 56, No. 6, 2186-2195, 2007.
doi:10.1109/TIM.2007.907954 Google Scholar

7. Bao, L., R. Y. Wu, X. Fu, et al. "Multi-beam forming and controls by metasurface with phase and amplitude modulations," IEEE Transactions on Antennas and Propagation, Vol. 67, No. 10, 6680-6685, 2019.
doi:10.1109/TAP.2019.2925289 Google Scholar

8. Zhang, L., Z. X. Wang, R. W. Shao, et al. "Dynamically realizing arbitrary multi-bit programmable phases using a 2-bit time-domain coding metasurface," IEEE Transactions on Antennas and Propagation, Vol. 68, No. 4, 2984-2992, 2019.
doi:10.1109/TAP.2019.2955219 Google Scholar

9. Parinaz, N., S. A. Matos, et al. "Dual-band dual-linear-to-circular polarization converter in transmission mode application to K/Ka-band satellite communications," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 12, 7128-7137, 2018.
doi:10.1109/TAP.2018.2874680 Google Scholar

10. Yu, N., P. Genevet, M. A. Kats, et al. "Light propagation with phase discontinuities reflection and refraction," Science, Vol. 334, No. 6054, 333-337, 2011.
doi:10.1126/science.1210713 Google Scholar

11. Abdulkarim, Y. I., H. N. Awl, F. F. Muhammadsharif, et al. "A low-profile antenna based on single-layer metasurface for Ku-band applications," International Journal of Antennas and Propagation, 8813951, 2020. Google Scholar

12. Afzal, M. U. and K. P. Esselle, "Recent advances in near-field meta-steering," 2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, IEEE, 2020. Google Scholar

13. Zhang, P., L. Li, X. Zhang, et al. "Design, measurement and analysis of near-field focusing reflective metasurface for dual-polarization and multi-focus wireless power transfer," IEEE Access, Vol. 7, 10387-110399, 2019. Google Scholar

14. Lv, Y. H., X. Ding, B. Z. Wang, et al. "Wideband polarization-insensitive metasurface with tunable near-field scattering focusing characteristic," Electronics Letters, Vol. 55, No. 14, 776-778, 2019.
doi:10.1049/el.2019.1275 Google Scholar

15. Fan, J. and Y. Cheng, "Broadband high-efficiency cross-polarization conversion and multi-functional wavefront manipulation based on chiral structure metasurface for terahertz wave," Journal of Physics D: Applied Physics, Vol. 53, No. 2, 025109, 2020.
doi:10.1088/1361-6463/ab4d76 Google Scholar

16. Yu, S., H. Liu, et al. "Design of near-field focused metasurface for high-efficient wireless power transfer with multifocus characteristics," IEEE Transactions on Industrial Electronics, Vol. 66, No. 5, 3993-4002, 2019.
doi:10.1109/TIE.2018.2815991 Google Scholar

17. Wan, X., Q. Zhang, T. Y. Chen, et al. "Multichannel direct transmissions of near-field information," Light: Science & Applications, Vol. 8, No. 1, 60, 2019.
doi:10.1038/s41377-019-0169-3 Google Scholar

18. Cui, T. J., Q. Q. Mei, X. Wan, et al. "Coding metamaterials, digital metamaterials and programming metamaterials," Light: Science & Applications, Vol. 3, No. 10, e218, 2014.
doi:10.1038/lsa.2014.99 Google Scholar

19. Ozdemir, E., O. Akgol, F. O. Alkurt, et al. "Mutual coupling reduction of cross-dipole antenna for base stations by using a neural network approach," Applied Sciences, Vol. 10, No. 1, 378, 2020.
doi:10.3390/app10010378 Google Scholar

20. Alkurt, F. O., M. E. Ozdemir, O. Akgol, et al. "Ground plane design configuration estimation of 4.9 GHz reconfigurable monopole antenna for desired radiation features using artificial neural network," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 32, No. 8, e22734, 2021. Google Scholar

21. Afzal, M. U., et al. "A low-profile printed planar phase correcting surface to improve directive radiation characteristics of electromagnetic band gap resonator antennas," IEEE Transactions on Antennas & Propagation, Vol. 64, No. 1, 276-280, 2016.
doi:10.1109/TAP.2015.2493159 Google Scholar

22. Guo, W.-L., G.-M. Wang et al. "Multi-functional coding metasurface for dual-band independent electromagnetic wave control," Optics Express, Vol. 27, No. 14, 19196-19211, 2019.
doi:10.1364/OE.27.019196 Google Scholar

Professor Honggang Hao

Dr. Sen Zheng

Dr. Yihao Tang

Dr. Xuehong Ran