Journal of information and communication convergence engineering

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Wideband Double-Radiator Circular Disc Annular Monopole Antenna

  • Afoakwa, Samuel (Department of Electronic Engineering, Hanbat National University) ;
  • Diawuo, Henry Abu (Department of Electronic Engineering, Hanbat National University) ;
  • Jung, Young-Bae (Department of Electronic Engineering, Hanbat National University)
  • Received : 2018.10.31
  • Accepted : 2018.11.25
  • Published : 2018.12.31
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Abstract

A wideband double radiator circular disc annular monopole antenna is proposed is this work. The radiators are etched on the surfaces of two Taconic TLY-5 substrates with a circular hole cut out of each of the radiators initially at the centers of the radiators with subsequent downward displacement of the holes. The antenna is designed with a two-step feeding transformer system for impedance matching between the input power source supplied by a $50-{\Omega}$ SMA connector and the monopole radiators. The transformer system improves the bandwidth performance at higher frequencies. The proposed antenna achieves a wideband having the capability of working between 0.645 and 18.775 GHz, corresponding to a -10 dB bandwidth of 186.7% with gain ranging from 0.95 to 8.26 dBi. In comparison to other metal disc planar monopole antennas, the proposed antenna has a small total size width due to the size of the ground plane, which has a diameter 100 mm. The frequency range of the antenna provides applications in global positioning systems, mobile communications, ultra-wideband short distance communications, and wireless computer networks.

Keywords

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Fig. 1. Monopole antenna structure. (a) Front view of antenna (G = 100 mm, R = 50 mm, r = 28 mm, H = 114 mm, C = 10 mm, h = 4 mm, I = 3 mm, L= 12 mm, Ls = 4 mm, T = tuners). (b) Top view of antenna (L = 14 mm, W = 6 mm, G = 100 mm, Sx = 3.0 mm, Sz = 0.543 mm, S = 4.086). (c) Side view.

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Fig. 2. Surface current distribution of antenna at 0.8 GHz (a) and 18 GHz (b).

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Fig. 3. Two-step transformer: (a) parametric sweep of L and (b) parametric sweep of Ls.

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Fig. 4. Fabricated wideband monopole antenna.

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Fig. 6. Simulated and measured radiation patterns of antenna at 0.8 GHz (a) and 18 GHz (b).

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Fig. 5. Simulated and measured input reflection co-efficient.

Table 1. Comparison of proposed antenna with other antennas

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References

  1. Q. Wu, R. Jin, and J. Geng, "Ultra-wideband quasi-circular monopole antennas with rectangular and trapezoidal grounds," IET Microwaves, Antennas & Propagation, vol. 3, no. 1, pp. 55-61, 2009. DOI: 10.1049/IET-MAP.2009.0215.
  2. M. J. Ammann, "Control of the impedance bandwidth of wideband planar monopole antennas using a beveling technique," Microwave and Optical Technology Letters, vol. 30, no. 4, pp. 229-232, 2001. DOI: 10.1002/MOP.2001.1273.
  3. M. J. Ammann and Z. N. Chen, "Wideband monopole antennas for multi-band wireless systems," IEEE Antennas and Propagation Magazine, vol. 45, no. 2, pp. 146-150, 2003. DOI: 10.1109/MAP.2003.1203133.
  4. M. J. Ammann and Z. N. Chen, "A wideband shorted planar monopole with bevel," IEEE Transactions on Antennas and Propagation, vol. 51, no. 4, pp. 901-903, 2003. DOI: 10.1109/TAP.2003.811061.
  5. N. P. Agrawall, G. Kumar and K. P. Ray, "Wide-band planar monopole antennas," IEEE Transactions on Antennas and Propagation, vol. 46, no. 2, pp. 294-295, 1998. DOI: 10.1109/TAP.1998.660976.
  6. M. Hammoud, P. Poey, and F. Colombel, "Matching the input impedance of a broadband disc monopole," Electronics Letters, vol. 29, no. 4, pp. 406-407, 1993. DOI: 10.1049/el:19930272.
  7. S. Honda, M. Ito, H. Seki, and Y. Jinbo, "A disc monopole antenna with 1:8 impedance bandwidth and omnidirectional radiation pattern," in Proceedings of the International Symposium on Antennas and Propagation, Sapporo, Japan, pp. 1145-1145, 1992.
  8. M. J. Ammann, "Square planar monopole antenna," in Proceedings of IEE National Conference on Antennas and Propagation, York, UK, pp. 37-40, 1999. DOI: 10.1049/cp:19990010.
  9. E. Antonino-Daviu, M. Cabedo-Fabres, M. Ferrando-Bataller, and A. Valero-Nogueira, "Wideband double-fed planar monopole antennas," Electronics Letters, vol. 39, no. 23, p. 1635, 2003. DOI: 10.1049/el:20031087.
  10. Z. N. Chen, M. J. Ammann, M. Y. W. Chia, and T. S. P. See, "Annular planar monopole antennas," IEE Proceedings-Microwave, Antennas and Propagation, vol. 149, no. 4, pp. 200-203, 2002. DOI: 10.1049/ip-map:20020701.
  11. Y. Huang and K. Boyle, Antennas from Theory to Practice. Chichester: John Wiley & Sons, 2008.
  12. S. Barbarino and F. Consoli, "Study on super-wideband planar asymmetrical dipole antennas of circular shape," IEEE Transactions on Antennas and Propagation, vol. 58, no. 12, pp. 4074-4078, 2010. DOI: 10.1109/TAP.2010.2078469.
  13. K. L. Wong, C. H. Wu, and S. W. Su, "Ultrawide-band square planar metal-plate monopole antenna with a trident-shaped feeding strip," IEEE Transactions on Antennas and Propagation, vol. 53, no. 4, pp. 1262-1269, 2005. DOI: 10.1109/TAP.2005.844430.