Design and Analysis of Ultra Low-Profile ILA on a Rectangular Conducting Plane

  • Abstract
  • Keywords
  • References
  • PDF
  • Abstract

    The unbalanced fed ultra low profile inverted L antenna on a rectangular conducting plane is proposed and analyzed numerically and experimentally.  By adjusting the length and height of inverted L antenna, the feed point position, and the size of conducting plane, the return loss bandwidth and the directivity can be controlled. The return loss bandwidth of 2.57 % and the directivity of 4.34 dBi are obtained, when the size of conducting plane is 0.245  (: wavelength) by 0.49 , and the antenna height is /30.  The input impedance of the proposed antenna is compared with those of the conventional base-fed inverted L antenna and the base fed inverted F antenna.  Although the directivity of base-fed inverted L antenna is almost same as that of proposed antenna, its input resistance becomes very low.  In the base fed inverted F antenna, the return loss larger than 10 dB is not satisfied in the case of the antenna height less than 0.05 .



  • Keywords

    ILA, Low Profile Antenna, Return Loss, Unbalanced Fed, WIPL-D.

  • References

      [1] J. D. Kraus: Antennas. New York: McGraw-Hill, pp. 425–427 and 461-467, 1988.

      [2] C. A. Balanis: Antenna Theory Analysis and Design. New York: Wiley, pp. 175–180, 1997.

      [3] S. A. Schelkunoff and H. T. Friis: Antennas Theory and Practice. New York: Wiley, 1952.

      [4] A. Thumvicit, T. Takano and Y. Kamata: “Characteristics verification of a half-wave dipole very close to a conducting plane with excellent impedance matching”, IEEE Trans. on Antennas and Propagat., vol.55, no.1, pp.53-58, Jan.2007.

      [5] T. Yamashita and M. Taguchi: “Ultra Low Profile Inverted L Antenna on a Finite Conducting Plane”, Proc. 2009 International Symp. on Antennas and Propagation, pp.361-364, Oct.2009.

      [6] H. Attia, M. M. Bait-Suwalian and O. M. Ramahi, “Enhanced Gain Planar Inverted-F Antenna with Metamaterial Superstrate for UMTS Applications”, Proc. PIERS., Cambridge, USA, pp. 494-497, 2010.

      [7] Z. N. Chen, K. Hirasawa, “A New Inverted F Antenna with a Ring Dielectric Resonator”, IEEE Trans. On Vehicular Technology, Vol. 48, No. 4, pp. 1029-1032, 1999.

      [8] D. Liu and B. P. Gaucher, “The inverted-F antenna height effects on bandwidth”, Proc. IEEE Antenna Propag. Symp., Vol. 2A, pp. 367-370, 2005.

      [9] D. Liu and B. P. Gaucher, “A branched inverted-F antenna for dual band WLAN applications”, Proc. IEEE Int. Symp. Antenna Propagations, Vol.3, pp. 2263-2626, 2004.

      [10] S. Schulteis, C. Waldschmidt, C. Kuhnert and W. Wiesbeck, “Design of a Capacitively Loaded Inverted F Antenna for Wireless-LAN Applications”, Proc. International ITG-Conference on Antennas, 178:187-190, 2003.

      [11] K. Ito and T. Hose, “Study on the characteristics of planar inverted F antenna mounted in laptop computers for wireless LAN”, Proc. IEEE Int. Symp. Antennas Propag., Vol. 2, pp. 22-25, 2003.

      [12] E. Rohadi and M. Taguchi, “Ultra low profile antenna for 2.45 GHz wireless commnication”, Proc. 2012 IEEE Int. Conf. on Communications, Network and Satellite , pp.103-107, 2012.

      [13] “WIPL-D Pro v7.0 3D Electromagnetic Solver Professional Edition User’s Manual”, WIPL-D, 2009.


      [15] D. M. Pozar: “Microwave Engineering”, Chapter 3, Addison-Wesley Publishing Company, 1990.





Article ID: 26863
DOI: 10.14419/ijet.v7i4.44.26863

Copyright © 2012-2015 Science Publishing Corporation Inc. All rights reserved.