Bandwidth Enhanced and Gain Improvement of Compact Patch Antenna Using Metamaterials for UWB applications

Authors O. Mahri1 , N. Guebgoub1 , A. Khalfallaoui1, T.A. Denidni2

1Laboratoire des Télécommunications, Université 8 Mai 1945, 24000-B.401 Guelma, Algérie

2CEMT – INRS, 800 Rue De La Gauchetière Ouest, Bureau 6900 Québec, H5A 1K6, Canada

Issue Volume 16, Year 2024, Number 2
Dates Received 27 December 2023; revised manuscript received 20 April 2024; published online 29 April 2024
Citation O. Mahri, N. Guebgoub, et al., J. Nano- Electron. Phys. 16 No 2, 02016 (2024)
PACS Number(s) 84.40.Ba
Keywords UWB (9) , Compact Antenna, Metamaterial (2) , Unit Cell, EBG (3) , Negative Permittivity, NEPM.

A compact new ultra-wideband (UWB) antenna using planar metamaterial (MTM) structures is proposed. The antenna is designed with a double-side planar periodic cell structure. The proposed 3-D unit cell show an artificial negative electric permittivity medium (NEPM), exhibiting a wide electromagnetic band-gap (EBG) created by etching four L-shaped slots on the main square patch and crossed-shaped slots on the ground plane. The proposed antenna fabricated on a 1.52 mm low-cost Rogers RO4003C substrate, is compact, measuring 22.4 ( 25.6 mm2, with a relative permittivity of 3.38 and a loss tangent of 0.0027. It has a broad bandwidth covering 3.8 GHz to 17.7 GHz, relatively 129%. The average gain over the entire bandwidth is 5.44 dB, with a peak value of 8.55 dB at 15.5 GHz. Design and simulation were carried out using the finite integration technique (FIT)-based CST microwave studio. The measured return loss (S11) of the prototype was in good agreement with the simulated results. The proposed antenna shows satisfactory radiation efficiency, achieving between 80% and 93% over the whole band. The measured gain of the test antenna demonstrates favorable radiation characteristics and shows the stability of radiation patterns at low frequencies. A comparative study with the related literature reviews recently published highlights the compactness of our MTM antenna configuration, presenting a reduction factor between 43.13% and 56.25%. Due to its outstanding performance, the proposed design is positioned as a strong candidate for various UWB applications, and also can be used for satellite communications and radar applications.

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