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


  • Erfan Rohadi
  • Mochammad Firdaus Ali
  • Indrazno Siradjuddin
  • Awan Setiawan
  • Amalia Amalia
  • Yudhi Darmawan





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


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 ï¬ (ï¬: wavelength) by 0.49 ï¬, and the antenna height is ï¬/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 ï¬.




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How to Cite

Rohadi, E., Firdaus Ali, M., Siradjuddin, I., Setiawan, A., Amalia, A., & Darmawan, Y. (2018). Design and Analysis of Ultra Low-Profile ILA on a Rectangular Conducting Plane. International Journal of Engineering & Technology, 7(4.44), 55–60.
Received 2019-01-31
Accepted 2019-01-31
Published 2018-12-01