Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2022 Dec 27;13(1):136.
doi: 10.3390/nano13010136.

Miniaturized Spoof Plasmonic Antennas with Good Impedance Matching

Yi Ren  1   2   3 , Jingjing Zhang  1   2   3 , Xinxin Gao  1   2   3 , Xin Zheng  1   2   3 , Le Peng Zhang  1   2   3 , Tie Jun Cui  1   2   3
Affiliations

Miniaturized Spoof Plasmonic Antennas with Good Impedance Matching

Yi Ren et al. Nanomaterials (Basel). .

Abstract

The ability of spoof surface plasmon polaritons (SSPPs) to confine electromagnetic fields in a subwavelength regime enables the design of miniaturized antennas. However, the impedance matching scheme for miniaturized spoof plasmonic antennas has not been studied systematically. In this paper, we propose a general method in the antenna design based on SSPPs, providing a feasible solution to impedance matching at the feeding point of miniaturized spoof plasmonic antennas. To verify the method, a prototype of a planar spoof plasmonic dipole antenna is simulated, fabricated and measured, of which the dipole arm length is reduced by 35.2% as compared with the traditional dipole antenna. A peak gain level of 4.29 dBi and the radiation efficiency of about 94.5% were measured at 6 GHz. This general method can be extended to solve the impedance matching problem in the design of other spoof plasmonic devices.

Keywords: impedance matching; miniaturized antenna; spoof surface plasmon polaritons.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Top (a) and bottom (b) schematic diagrams of the proposed spoof plasmonic dipole antenna, where l1 = 3.8 mm, l2 = 7 mm, l3 = 10 mm, w1 = 1.14 mm, w2 = 1.6 mm, r = 3 mm, s = 0.2 mm, p = 1.6 mm, h = 3 mm, a = 1.3 mm, d = 2.6 mm.
Figure 2
Figure 2
(a) |ΓV| of spoof plasmonic dipole antennas (n = 4, 5 and 6). (b) Load impedance of spoof plasmonic dipole antennas (n = 4, 5 and 6) in the complex plane from 4 GHz to 8 GHz. The star represents the position of Z0 at 6 GHz, and the circles show ZL of spoof plasmonic dipole antennas (n = 4, 5 and 6) at 6 GHz.
Figure 3
Figure 3
(a) Photograph of the sample. (b) Photograph of the near-field scanner. Simulated (c) and measured (d) near-field distribution of the sample at 6 GHz.
Figure 4
Figure 4
Analytical fitting to the corresponding measured |Ez|.
Figure 5
Figure 5
(a) Simulated and measured S11 of spoof plasmonic dipole antennas (n = 4, 5 and 6). (b) Simulated and measured radiation efficiency of spoof plasmonic dipole antennas (n = 4, 5 and 6).
Figure 6
Figure 6
(a) Simulated and measured E-plane far-field patterns of the miniaturized spoof plasmonic dipole antenna (n = 5). (b) Simulated and measured H-plane far-field patterns of the miniaturized spoof plasmonic dipole antenna (n = 5).
See this image and copyright information in PMC

References

    1. Lalbakhsh A., Simorangkir R.B.V.B., Bayat-Makou N., Kishk A.A., Esselle K.P. Chapter 2—Advancements and artificial intelligence approaches in antennas for environmental sensing. In: Asadnia M., Razmjou A., Beheshti A., editors. Artificial Intelligence and Data Science in Environmental Sensing. Academic Press; Cambridge, MA, USA: 2022. pp. 19–38.
    1. Lalbakhsh A., Afzal M.U., Esselle K.P., Smith S.L. All-Metal Wideband Frequency-Selective Surface Bandpass Filter for TE and TM Polarizations. IEEE Trans. Antennas Propag. 2022;70:2790–2800. doi: 10.1109/TAP.2021.3138256. - DOI
    1. Das P., Mandal K., Lalbakhsh A. Beam-steering of microstrip antenna using single-layer FSS based phase-shifting surface. Int. J. RF Microw. Comput. Eng. 2021;32:e23033. doi: 10.1002/mmce.23033. - DOI
    1. Lalbakhsh A., Afzal M.U., Hayat T., Esselle K.P., Mandal K. All-metal wideband metasurface for near-field transformation of medium-to-high gain electromagnetic sources. Sci. Rep. 2021;11:9421. doi: 10.1038/s41598-021-88547-3. - DOI - PMC - PubMed
    1. Esfandiari M., Lalbakhsh A., Nasiri Shehni P., Jarchi S., Ghaffari-Miab M., Noori Mahtaj H., Reisenfeld S., Alibakhshikenari M., Koziel S., Szczepanski S. Recent and emerging applications of Graphene-based metamaterials in electromagnetics. Mater. Des. 2022;221:110920. doi: 10.1016/j.matdes.2022.110920. - DOI

LinkOut - more resources