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Plasma-Based Artificial Magnetic Conductor for Polarization Reconfigurable Dielectric Resonator Antenna

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Abstract

Polarization reconfigurable dielectric resonator antenna (DRA) backed by plasma artificial magnetic conductor (AMC) ground plane is designed and optimized for 10-GHz applications. The AMC unit-cell consists of a metal cylinder with two pairs of cuts filled with a noble gas. According to the ionization degree of gas in the two pair of cuts, three polarization states are obtained. The AMC unit-cell operates at 10 GHz with ± 90° bandwidth of 26% and axial ratio (AR) bandwidth span from 9.3 to 10.25 GHz. A linearly polarized (LP) cylindrical DRA backed by 4 × 4 AMC ground plane is investigated. A wide impedance bandwidth of 20%, peak gain 7.8 dBi, and AR < 3 dB of 3.2% are achieved. A parametric study on the AMC unit-cell dimensions is presented. The DRA loaded with optimized AMC unit-cells broaden the AR bandwidth from 9.6 to 10.7 GHz (11%). A 13 × 13 unit-cell perforated dielectric reflectarray loading the DRA is used to increase the total gain. A peak gain of 19.5 dBi is achieved with reconfigurable polarization states. A sequential cooperate feeding network is used with 2 × 2 DRA backed by 8 × 8 AMC unit-cells to improve the gain and CP bandwidth. Two chessboard square and triangle arrangements of AMC unit-cells are investigated. The square arrangement improves AR bandwidth to 2.4 GHz, gain to 13.3 dBi, and side lobe level (SLL) below the main beam to − 12.3 dB. Full-wave simulation is used to study and optimize the proposed structures.

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Authors and Affiliations

  1. Faculty of Electronic Engineering, Menoufia University, Menouf, Egypt

    Hend Abd El-Azem Malhat & Saber Helmy Zainud-Deen

  2. Faculty of Engineering and Technology, Badr University in Cairo (BUC), Badr, Egypt

    Saber Helmy Zainud-Deen

Authors
  1. Hend Abd El-Azem Malhat
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  2. Saber Helmy Zainud-Deen
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Correspondence to Hend Abd El-Azem Malhat.

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Malhat, H.A.EA., Zainud-Deen, S.H. Plasma-Based Artificial Magnetic Conductor for Polarization Reconfigurable Dielectric Resonator Antenna. Plasmonics 15, 1913–1924 (2020). https://doi.org/10.1007/s11468-020-01189-5

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  • DOI: https://doi.org/10.1007/s11468-020-01189-5

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