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UWB Antipodal Vivaldi antenna with higher radiation performances using metamaterials

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Abstract

In this paper, an Ultra-Wide-Band (UWB) Antipodal Vivaldi antenna with higher radiation performances is proposed. Zero-index metamaterials units with Meander-line shape are placed on the antenna aperture to improve the antenna directivity. An increase of 4 dB in the gain with equal beamwidths in the E and H planes is achieved at different frequencies. The antenna covers 142.8% bandwidth with input match better than − 10 dB from 1.3 GHz to 12 GHz. It has practically unchanged radiation patterns over the operating bandwidth where the gain varies from 9.5 dB at 5 GHz–12.4 dB at 10 GHz. Measurement results show satisfactory agreement with simulation. Therefore, loading with metamaterials makes the VIVALDI antenna directivity frequency independent. This UWB antenna is eventually a good candidate for wireless communications and radar applications.

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Authors and Affiliations

  1. Innov’COMResearchLaboratorySup’com, University of Carthage, Tunis, Tunisia

    Mohamed-Ali Boujemaa & Fethi Choubani

  2. CSEHF Faculty of Sciences of Tunis, 2092, El Manar I, Tunisia

    Rabiaa Herzi & Ali Gharsallah

Authors
  1. Mohamed-Ali Boujemaa
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  2. Rabiaa Herzi
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  3. Fethi Choubani
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  4. Ali Gharsallah
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Correspondence to Rabiaa Herzi.

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Boujemaa, MA., Herzi, R., Choubani, F. et al. UWB Antipodal Vivaldi antenna with higher radiation performances using metamaterials. Appl. Phys. A 124, 714 (2018). https://doi.org/10.1007/s00339-018-2132-1

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