volume | PIER Journals

Abstract

A miniaturized TM21 mode circular patch antenna is introduced. The miniaturization is realized by loading the patch with four symmetric radial slits, which facilitate elongating the current path and thus reducing the resonant frequency and the patch size. In particular, the eigenvalue of the proposed higher order mode is reduced to that of a conventional dominant TM11 mode antenna, resulting in about 40% reduction in the radius. The effects of the slit geometry on miniaturization and resonant frequency are studied. The measurement results are also presented, which are in good agreement with the simulation ones. Such miniaturized TM21 patch antennas with conical radiation patterns have manifold applications in phased array antennas for booming communication demands.

1. Huang, J., "Circularly polarized conical patterns from circular microstrip antennas," IEEE Trans. Antennas Propag., Vol. 32, No. 9, 991-994, Sept. 1984.
doi:10.1109/TAP.1984.1143455

2. Garg, R., P. Bhartia, I. Bahl, and A. Ittipiboon, Microstrip Antenna Design Handbook, Artech House, 1995.

3. Ravipati, C. B., D. R. Jackson, and H. Xu, "Center-fed microstrip antennas with shorting vias for miniaturization," IEEE Antennas and Propagation Society International Symposium, Vol. 3b, July 2005.

4. Ikonen, P. M. T., K. N. Rozanov, A. V. Osipov, P. Alitalo, and S. A. Tretyakov, "Magnetodielectric substrates in antenna miniaturization potential and limitations," IEEE Trans. Antennas Propag., Vol. 54, No. 11, 3391-3399, 2006.
doi:10.1109/TAP.2006.884303

5. Wang, D., H. Wong, and C. H. Chan, "Small patch antennas incorporated with a substrate integrated irregular ground," IEEE Trans. Antennas Propag., Vol. 60, No. 7, 3096-3103, July 2012.
doi:10.1109/TAP.2012.2196915

6. Luk, K., R. Chair, and K.-F. Lee, "Small rectangular patch antenna," Electron. Lett., Vol. 34, No. 25, 2366-2367, 1998.
doi:10.1049/el:19981643

7. Wong, K. L., C. L. Tang, and H. T. Chen, "A compact meandered circular microstrip antenna with a shorting pin," Microwave Opt. Technol. Lett., Vol. 15, 147-149, June 20, 1997.

8. Lai, H. W., P. Li, and K. M. Luk, "Wideband small patch antenna," Electron. Lett., Vol. 39, No. 8, 641-642, 2003.
doi:10.1049/el:20030417

9. Wong, M. L., H. Wong, and K. M. Luk, "Small circularly polarised patch antenna," Electron. Lett., Vol. 41, No. 16, 7-8, 2005.
doi:10.1049/el:20051513

10. Sun, L., B.-H. Sun, Q. Sun, and W. Huang, "Miniaturized annular ring slot antenna for small/mini UAV applications," Progress In Electromagnetics Research C, Vol. 54, 1-7, 2014.
doi:10.2528/PIERC14090302

11. Olaode, O. O. and W. D. Palmer, "Effects of meandering on dipole antenna resonant frequency," IEEE Antennas Wireless Propag. Lett., Vol. 11, 122-125, January 2012.
doi:10.1109/LAWP.2012.2184255

12. Rogers Corporation "RT/duroid 5870/5880 High Frequency Laminates,", 5870/5880 datasheet, [Revised June 2017].

13. High Frequency Structure Simulator (HFSS 18.0), Canonsburg, , PA, Boston, MA: ANSYS, [Online], Available: http://www.ansoft.com/products/hf/hfss.

Dr. Saininad Naik

Professor Maria Pour