Cover
Vol. 17 No. 2 (2017)

Published: September 30, 2017

Pages: 33-37

Original Article

Design and Modeling of a Compact Reconfigurable Slot Antenna for WLAN Portable Devices

Falih M. Alnahwi 1
1 Department of Electrical Engineering University of Basrah College of Engineering
History
  • Received: June 30, 2017
  • Available Online: September 30, 2017
DOI

https://doi.org/10.33971/bjes.17.2.4

Abstract

This paper presents design and modeling of a compact reconfigurable quarter wavelength slot antenna compatible with the portable devices of the 5GHz wireless local area network (WLAN) applications. The concept of the transverse resonant method which is used for the transmission lines is utilized for modeling the proposed slot antenna. A PIN diode is used to switch the antenna operating band from the lower unlicensed indoor 5GHz WLAN band (5-5.3) GHz to the upper one (5.7-5.9) GHz and vice versa. Another PIN diode is attached to the feed line to provide suitable matching stub length for each operation mode. Furthermore, the shape of the radiating slot of the proposed antenna is modified to provide an omnidirectional radiation pattern in the H-plane suitable for the portable gadgets of the WLAN system. The measurements are in well agreement with the simulated results, and they verify the precision of the suggested model and the enhanced matching characteristics for the two operation modes of the proposed antenna.

Keywords

References

  1. H. Schantz, “UWB Magnetic Antennas,” IEEE Antenna and Propagation Society International Symposium, vol. 3, pp. 604-607, June 2003.
  2. F. Alnahwi and N. Islam, “A Generalized Concept for Band Notch Generation in Ultra-Wide Band Antennas,” Progress in Electromagnetic Research C, vol. 54, pp. 179-185, 2014.
  3. L. Pazin and Y. Leviatan, “Reconfigurable Rotated-T Slot Antenna for Cognitive Radio Systems,” IEEE Transactions on Antennas and Propagation, vol. 62, no. 5, pp. 2382-2387, May 2014.
  4. A. Khidre, F. Yang, and A. Elsherbeni, “A Patch Antenna With a Varactor-Loaded Slot for Reconfigurable Dual-Band Operation,” IEEE Transactions on Antennas and Propagation, vol. 63, no. 2, pp. 755-760, Feb. 2014.
  5. A. Saghati, J. Batra, J. Kameoka, and K. Entesari, “A Microfluidically-Reconfigurable Dual-Band Slot Antenna with a Frequency Coverage Ratio of 3:1,” IEEE Antenna and Wireless Propagation Letters, vol. 15, pp. 122-125, 2016.
  6. L. Han, C. Wang, X. Chen, and W. Zhang, “Compact Frequency Reconfigurable Slot Antenna for Wireless Applications,” IEEE Antenna and Wireless Propagation Letters, vol. 15, pp. 1795-1798, 2016.
  7. M. Stanley, Y. Huang, H. Wang, H. Zhou, Z. Tian, and Q. Xu, “A Novel Reconfigurable Metal Rim Integrated Open Slot Antenna for Octa-band Smartphone Applications,” IEEE Transactions on Antennas and Propagation, vol. 65, no. 7, pp. 3352- 3363, 2017.
  8. G. Srivastava , A. Mohan, and A. Chakrabarty, “Compact Reconfigurable UWB Slot Antenna for Cognitive Radio Applications,” IEEE Antenna and Wireless Propagation Letters, vol. 16, pp. 1139-1142, 2017.
  9. D. Pozar, Microwave Engineering, 4 th Ed., John Wiley and Sons, 2012.
  10. N. Behdad and K. Sarabandi, “Dual-Band Reconfigurable Antenna With a Very Wide Tunability Range,” IEEE Transactions on Antennas and Propagation, vol. 54, no. 2, pp. 409-4016, Feb. 2006.
  11. K. Gupta, R. Garg, I. Bahl, P. Bhartia, Microstrip Lines and Slotlines, 2 nd Ed., Artech House, 1996.
  12. J. Kim, and W. Park, “Network Modeling of an Inclined and Off-Center Microstrip-Fed Slot Antenna,” IEEE Transactions on Antennas and Propagation, vol. 46, no. 8, pp. 1182-1188, Aug. 1998.