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Broadband gain enhancement of an UWB antenna using conformal wideband NRI metamaterial

  • Deepa Negi EMAIL logo , Rajesh Khanna and Jaswinder Kaur
Published/Copyright: December 21, 2020
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Frequenz
From the journal Frequenz Volume 75 Issue 3-4

Abstract

In this article, broadband gain enhancement of an ultra-wide band (UWB) antenna is achieved by using 4 × 4 array of a wideband negative refractive index (NRI) metamaterial as a reflector layer. A novel shaped metamaterial sized 14.8 × 14.8 mm2 with double negative (DNG) characteristics in three frequency regions has been fabricated on a flexible FR4 with 0.25 mm thickness. The proposed metamaterial gives a continuous NRI bandwidth of 10 GHz (2–12 GHz). The effective parameters of the unit cell cover S, C, X, and Ku-band independently and show DNG region of 6.1 GHz at C (4–8 GHz) and X band (8.8–10.5 GHz, 11.2–11.6 GHz). The unit cell structure is also found to be feed insensitive. The unit cell has small volume of 54.76 mm3 along with flexible nature which makes it suitable for wearable applications. For a 4 × 4 array the metamaterial still exhibits DNG characteristics. To understand the physical behavior of the unit cell, the circuit analysis along with the study of magnetic and electric field distribution at three resonance frequencies (2.2, 8.2 and 14.2 GHz) is done. Both simulation and measured results indicate that the gain and bandwidth of metamaterial antenna are enhanced by 2 dB and 0.8 GHz.

Keywords: array; broadband NRI; flexible metamaterial; gain and bandwidth enhancement; UWB antenna
Corresponding author: Deepa Negi, Department of Electronics and Communication Engineering, Thapar Institute of Engineering and Technology, Patiala, India, E-mail:

  1. Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2020-06-09
Accepted: 2020-11-30
Published Online: 2020-12-21
Published in Print: 2021-03-26

© 2020 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Research Articles
  3. A hybrid reconfigurability structure for a novel 5G monopole antenna for future mobile communication
  4. 3-D printed CDRA for radiation beam reconfigurability and beamforming in C-band
  5. Dual circular slot ring triple-band MIMO antenna for 5G applications
  6. Highly efficient artificial magnetic conductor enabled CPW fed compact antenna for BAN wearable applications
  7. Electrical equivalent circuit modelling of various fractal inspired UWB Antennas
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https://doi.org/10.1515/freq-2020-0089
Keywords for this article
array; broadband NRI; flexible metamaterial; gain and bandwidth enhancement; UWB antenna

Articles in the same Issue

  1. Frontmatter
  2. Research Articles
  3. A hybrid reconfigurability structure for a novel 5G monopole antenna for future mobile communication
  4. 3-D printed CDRA for radiation beam reconfigurability and beamforming in C-band
  5. Dual circular slot ring triple-band MIMO antenna for 5G applications
  6. Highly efficient artificial magnetic conductor enabled CPW fed compact antenna for BAN wearable applications
  7. Electrical equivalent circuit modelling of various fractal inspired UWB Antennas
  8. Broadband gain enhancement of an UWB antenna using conformal wideband NRI metamaterial
  9. Non-invasive detection and discrimination of breast tumors at early stage using spiral antenna
  10. Wear-level-monitoring on electrical conductors with high-frequency alternating currents
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