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An analysis of leaky hybrid modes depending on structural parameters in a circular dielectric rod

  • Ersoy Kelebekler ORCID logo EMAIL logo
Published/Copyright: April 19, 2021
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Frequenz
From the journal Frequenz Volume 75 Issue 9-10

Abstract

Open dielectric waveguides are structures used to guide electromagnetic energy in integrated circuits above the cutoff or as leaky wave antennas propagating the energy transversely out of the waveguide in a narrow region below the cutoff. In this study, the related operating regions for the hybrid EH modes of a cylindrical dielectric rod were obtained analytically. Analyses of the leaky wave characteristics of the hybrid EH modes for various radii of the rod and various dielectric constant values were performed. The guided modes existing above the cutoff with a pure real propagation constant, and the leaky wave modes existing below the cutoff with a complex propagation constant, were obtained from the coefficient matrix of the characteristic equations system of the structure using the bisection method and Davidenko’s method, respectively. Additionally, the guided modes of the structure were obtained and designated in the light of previous studies in the literature. The results show that the frequency spectrum of the antenna mode region increases as the value of the dielectric constant and the radius of the dielectric rod decrease. In addition, a circular dielectric with a smaller radius and dielectric constant had a larger frequency spectrum in the leaky wave antenna applications.

Keywords: antenna modes; circular dielectric rod; Davidenko’s method; guided modes; leaky wave modes
Corresponding author: Ersoy Kelebekler, Electricity and Energy Department, Kocaeli University, Uzunçiftlik Nuh Çimento MYO, 41180, Kocaeli, Turkey, E-mail:

  1. Author contributions: 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: 2020-11-02
Accepted: 2021-03-09
Published Online: 2021-04-19
Published in Print: 2021-10-26

© 2021 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/freq-2020-0189
Keywords for this article
antenna modes; circular dielectric rod; Davidenko’s method; guided modes; leaky wave modes

Articles in the same Issue

  1. Frontmatter
  2. Research Articles
  3. Compact dual-band balanced bandpass filter based on circular SIW cavity
  4. Digital DC blocker filters
  5. A metasurface-enabled Fabry–Pérot (FP) circularly polarized antenna with continuous wideband polarization conversion purity
  6. Review Article
  7. A single-layer low-cost reflectarray antenna using dual-resonant element approach
  8. Research Articles
  9. Bilayer split-ring chiral metamaterial based reconfigurable antenna for polarization conversion
  10. Circularly polarized array antenna based on dual split ring resonators (DSRRs)
  11. An analysis of leaky hybrid modes depending on structural parameters in a circular dielectric rod
  12. Square DRA feed for parabolic reflector antenna for satellite communication application
  13. An ultra-wideband rectangular ring dielectric resonator antenna integrated with hybrid shaped patch for wireless applications
  14. Compact super-wideband MIMO antenna with improved isolation for wireless communications
  15. In-Band Full-Duplex FSK transceiver for IoT
  16. Review Article
  17. A survey on the characterization parameters and lifetime improvement techniques of wireless sensor network
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