Design and Analysis of Ultra Low-Profile ILA on a Rectangular Conducting Plane
Keywords: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¬.
 J. D. Kraus: Antennas. New York: McGraw-Hill, pp. 425â€“427 and 461-467, 1988.
 C. A. Balanis: Antenna Theory Analysis and Design. New York: Wiley, pp. 175â€“180, 1997.
 S. A. Schelkunoff and H. T. Friis: Antennas Theory and Practice. New York: Wiley, 1952.
 A. Thumvicit, T. Takano and Y. Kamata: â€œCharacteristics verification of a half-wave dipole very close to a conducting plane with excellent impedance matchingâ€, IEEE Trans. on Antennas and Propagat., vol.55, no.1, pp.53-58, Jan.2007.
 T. Yamashita and M. Taguchi: â€œUltra Low Profile Inverted L Antenna on a Finite Conducting Planeâ€, Proc. 2009 International Symp. on Antennas and Propagation, pp.361-364, Oct.2009.
 H. Attia, M. M. Bait-Suwalian and O. M. Ramahi, â€œEnhanced Gain Planar Inverted-F Antenna with Metamaterial Superstrate for UMTS Applicationsâ€, Proc. PIERS., Cambridge, USA, pp. 494-497, 2010.
 Z. N. Chen, K. Hirasawa, â€œA New Inverted F Antenna with a Ring Dielectric Resonatorâ€, IEEE Trans. On Vehicular Technology, Vol. 48, No. 4, pp. 1029-1032, 1999.
 D. Liu and B. P. Gaucher, â€œThe inverted-F antenna height effects on bandwidthâ€, Proc. IEEE Antenna Propag. Symp., Vol. 2A, pp. 367-370, 2005.
 D. Liu and B. P. Gaucher, â€œA branched inverted-F antenna for dual band WLAN applicationsâ€, Proc. IEEE Int. Symp. Antenna Propagations, Vol.3, pp. 2263-2626, 2004.
 S. Schulteis, C. Waldschmidt, C. Kuhnert and W. Wiesbeck, â€œDesign of a Capacitively Loaded Inverted F Antenna for Wireless-LAN Applicationsâ€, Proc. International ITG-Conference on Antennas, 178:187-190, 2003.
 K. Ito and T. Hose, â€œStudy on the characteristics of planar inverted F antenna mounted in laptop computers for wireless LANâ€, Proc. IEEE Int. Symp. Antennas Propag., Vol. 2, pp. 22-25, 2003.
 E. Rohadi and M. Taguchi, â€œUltra low profile antenna for 2.45 GHz wireless commnicationâ€, Proc. 2012 IEEE Int. Conf. on Communications, Network and Satellite , pp.103-107, 2012.
 â€œWIPL-D Pro v7.0 3D Electromagnetic Solver Professional Edition Userâ€™s Manualâ€, WIPL-D, 2009.
 D. M. Pozar: â€œMicrowave Engineeringâ€, Chapter 3, Addison-Wesley Publishing Company, 1990.
View Full Article:
How to Cite
LicenseAuthors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under aÂ Creative Commons Attribution Licensethat allows others to share the work with an acknowledgement of the work''s authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal''s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (SeeÂ The Effect of Open Access).