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Coupling mechanism of a loop-type ground radiation antenna

  • Zahid, Zeeshan (Department of Electrical Engineering, College of Signals, National University of Sciences and Technology) ;
  • Kim, Hyeongdong (Department of Electronics and Computer Engineering, Hanyang University)
  • Received : 2018.03.28
  • Accepted : 2018.10.08
  • Published : 2019.08.02

Abstract

The coupling mechanism of a loop-type ground radiation antenna is investigated in this paper. We use the equivalent circuit model of the antenna and a full-wave simulation to explain the coupling mechanism of the antenna. We analyze the effects of various antenna parameters on the coupling between the antenna element and the ground plane to examine the conditions for enhancing the coupling. Based on simulations with the equivalent circuit model, full-wave simulations, and measurements, we propose optimal design considerations for the antenna. The findings of this study will aid the design and understanding of loop-type ground radiation antennas for mobile devices.

Keywords

References

  1. A. H. Wheeler, Small antennas, IEEE Trans. Antennas Propag. 23 (1975), 462-469. https://doi.org/10.1109/TAP.1975.1141115
  2. R. F. Harrington, Effect of antenna size on gain bandwidth and efficiency, J. Research 64D (1960), 1-12.
  3. R. E. Collin, Minimum Q of small antennas, J. Electromagn. waves Applicat. 12 (1998), 1369-1393. https://doi.org/10.1163/156939398X01457
  4. Y. Liu et al., Loop type ground antenna using resonated loop feeding, intended for mobile devices, Electron. Lett. 47 (2011), 426-427. https://doi.org/10.1049/el.2011.0094
  5. O. Cho et al., Loop type ground antenna using capacitor, Electron. Lett. 47 (2011), 11-12. https://doi.org/10.1049/el.2010.3215
  6. H. Choi, Ground radiation antenna, U.S. Patent US8,604,998, 2013.
  7. H. Choi et al., Ground radiator using capacitor, U.S. Patent US8,648,763, 2014.
  8. Y. Liu et al., Excitation techniques of loop current mode of ground antenna, in Proc. Cross Strait Quad‐Regional Radio Sci. Wireless Technol. Conf., Harbin, China, 2011, pp. 1732-1735.
  9. Y. Liu et al., Ground radiation using slot with coupling capacitor, Electron. Lett. 49 (2013), no. 7, 447-448. https://doi.org/10.1049/el.2012.4520
  10. R. F. Harrington, Time harmonic electromagnetics, 2nd ed., Wiley IEEE Press, Hoboken, NJ, USA, 2001.
  11. C. A. Balanis, Antenna theory: Analysis and design, 3rd ed.,Wiley Inter‐science, Hoboken, NJ, USA, 2005.
  12. Y. Liu et al., Loop type ground radiation antenna for dual band WLAN applications, IEEE Trans. Antennas Propag. 61 (2013), 4819-4823. https://doi.org/10.1109/TAP.2013.2267716
  13. R. Zhang et al., Bandwidth enhancement of ground antenna using resonant feeding circuit, Electron. Lett. 49 (2013), 441-442. https://doi.org/10.1049/el.2013.0691
  14. M. Salehi et al., Transient characteristics of small antennas, IEEE Trans. Antennas Propag. 62 (2014), no. 5, 2418-2429. https://doi.org/10.1109/TAP.2014.2307353
  15. P. Vainikainen et al., Resonator‐based analysis of the combination of mobile handset antenna and chassis, IEEE Trans. Antennas Propag. 50 (2002), 1433-1444. https://doi.org/10.1109/TAP.2002.802085
  16. J. Lee et al., Mobile antenna using multi‐resonance feed structure for wideband operation, IEEE Trans. Antennas Propag. 62 (2014), 5851-5855. https://doi.org/10.1109/TAP.2014.2346534
  17. Z. Zahid et al., Analysis of ground radiation antenna using equivalent circuit model, IET Microw., Antennas Propag. 11 (2017), no. 1, 23-28. https://doi.org/10.1049/iet-map.2016.0250
  18. D. M. Pozar, Microwave engineering, 4th ed., John Wiley & Sons, Hoboken, NJ, 2012.
  19. C. G. Montgomery et al., Principles of microwave circuits, New ed., Institution of Engineering and Technology, Stevenage, UK, 1986.