volume | PIER Journals

Abstract

A rectangular dielectric resonator antenna (DRA) based on Barium Strontium Titanate --- Cyclic Olefin Copolymer (BST-COC) composite for 2.4 GHz wrist application is designed and characterized. The dielectric properties of the composite with ~57 vol.% BST loading are characterized using microstrip ring resonator structures at 2.45 GHz frequency. The proposed DRA, fixed onto a reverse grounded FR4 laminate, has a very compact size of 19 mm×10 mm×5 mm. The impact of the user's body proximity on the radiation performance of the antenna is studied experimentally. The percentage total efficiency and gain of the antenna deteriorated by about 8.5% and 2 dB due to the proximity of the user's body. The proposed DRA showed better performance than that of resonant type of antennas when close to the user's body.

1. Palukuru, V. K., A. Pekonen, V. PynttÄari, R. Makinen, J. Hagberg, and H. Jantunen, "An inkjet-printed inverted-F antenna for 2.4-GHz wrist applications," Microw. Opt. Technol. Lett., Vol. 51, No. 12, 2936-2938, 2009.
doi:10.1002/mop.24777 Google Scholar

2. Wong, K. L., "Characteristics of a 2.4-GHz compact shorted patch antenna in close proximity to a lossy medium," Microw. Opt. Technol. Lett., Vol. 45, 480-483, 2005.
doi:10.1002/mop.20858 Google Scholar

3. Wu, C. H., K. L.Wong, Y. C. Lin, and S. W. Su, "Internal shorted monopole antenna for the watch-type wireless communication device for bluetooth operation," Microw. Opt. Technol. Lett., Vol. 49, 942-946, 2007.
doi:10.1002/mop.22322 Google Scholar

4. Palukuru, V. K., K. Sonoda, J. Hagberg, and H. Jantunen, "BST-polymer composite-based planar inverted-F (PIFA) chip antenna for 2.4 GHz wrist applications," Integr. Ferroelectr., 2010, DOI: 10.1080/10584587.2010.488159, in press. Google Scholar

5. Mongia, R. K. and P. Bhartia, "Dielectric resonator antennas-a review and general design relations for resonant frequency and bandwidth," J. Microw. Millim.-Wave Comput.-Aided Eng., Vol. 4, No. 3, 230-247, 1994.
doi:10.1002/mmce.4570040304 Google Scholar

6. Long, S. A., M. W. McAllister, L. C. and Shen, "The resonant cylindrical dielectric cavity antennas," IEEE Trans. Antennas Propag., Vol. 31, 406-412, 1983.
doi:10.1109/TAP.1983.1143080 Google Scholar

7. Mohanan, P., S. Mridula, BinuPaul, M. N. Suma, P. V. Bijumon, and M. T. Sebastian, "FDTD analysis of rectangular dielectric resonator antenna," J. Eur. Ceram. Soc., Vol. 27, No. 8-9, 2753-2757, 2006.
doi:10.1016/j.jeurceramsoc.2006.11.053 Google Scholar

8. Bijumon, P. V., S. K. Menon, M. N. Suma, M. T. Sebastian, and P. Mohanan, "Broadband cylindrical dielectric resonator antenna excited by modified microstrip line," IEEE Electron. Lett., Vol. 41, No. 7, 385-387, 2005.
doi:10.1049/el:20050090 Google Scholar

9. Chen, Y. C., S. M. Tsao, C. S. Lin, S. C. Wang, and Y. H. Chien, "Microwave dielectric properties of 0.95MgTiO3-0.05CaTiO3 for application in dielectric resonator antenna," J. Alloy Compounds, Vol. 471, 347-351, 2009.
doi:10.1016/j.jallcom.2008.03.118 Google Scholar

10. Fechine, P. B. A., R. S. T. Moretzsohn, R. C. S. Costa, J. Derov, J. W. Stewart, A. J. Drehman, C. Junqueira, and A. S. B. Sombra, "Magneto-dielectric properties of the Y3Fe5O12 and Gd3Fe5O12 dielectric ferrite resonator antennas," Microw. Opt. Technol. Lett., Vol. 50, No. 11, 2852-2857, 2008.
doi:10.1002/mop.23824 Google Scholar

11. Ain, M. F., S. I. S. Hassan, J. S. Mandeep, M. A. Othman, B. M. Nawang, S. Sreekantan, S. D. Hutagalung, and Z. A. Ahmad, "2.5 GHz BaTiO3 dielectric resonator antenna," Progress In Electromagnetics Research, Vol. 79, 201-210, 2007.
doi:10.2528/PIER07071102 Google Scholar

12. Palukuru, V. K., K. Sonoda, V. PynttÄari, T. Hu, R. MÄakinen, M. Mantysalo, J. Hagberg, and H. Jantunen, "Inkjet-printed RF structures on BST-polymer composites: An application of a monopole antenna for 2.4 GHz wireless local area network Operation," J. Appl. Cerram. Technol., 2010, DOI: 10.1111/j.1744-7402.2010.02532.x, in press. Google Scholar

13. Hu, T., J. Juuti, H. Jantunen, and T. Vilman, "Dielectric properties of BST/polymer composite," J. Eur. Ceram. Soc., Vol. 27, 3997-4001, 2007.
doi:10.1016/j.jeurceramsoc.2007.02.082 Google Scholar

14. Yang, L., A. Rida, R. Vyas, and M. M. Tentzeris, "RFID Tag and RF structures on a paper substrate using inkjet-printing technology," IEEE Trans. Microw. Theory Tech., Vol. 55, No. 12, 2894-2901, 2007.
doi:10.1109/TMTT.2007.909886 Google Scholar

15. Gang, Z., H. Gronqvist, J. P. Starski, and L. Johan, "Characterization of liquid crystal polymer for high frequency system-in-a-package applications," IEEE Trans. Adv. Packa., Vol. 25, No. 4, 503-508, 2002.
doi:10.1109/TADVP.2002.807593 Google Scholar

16. Saed, M. A. and R. Yadla, "Microstrip-fed low profile and compactdielectric resonator antennas," Progress In Electromagnetics Research, Vol. 56, 151-162, 2006.
doi:10.2528/PIER05041401 Google Scholar

17. Mohssin, A., E. M. Otman, E. Mohamed, and E. M. Ahmed, "A compact rectangular dielectric resonator antenna for UWB wireless communication systems," Microw. Opt. Technol. Lett., Vol. 51, No. 10, 2281-2286, 2009.
doi:10.1002/mop.24623 Google Scholar

18. Iversen, P. O., P. Garreau, and D. Burrel, "Real-time spherical near-field handset antenna measurements," IEEE Antenans Propag. Mag., Vol. 43, 90-94, 2001.
doi:10.1109/74.934906 Google Scholar

19. , , , Datasheet for Indexsar hand model, http://www.indexsar.com/pdf/Hand.prov.data.5-1106.pdf., accessed on September 9, 2010 .

Dr. Vamsi Krishna Palukuru

Mr. Kensaku Sonoda

Dr. Rajesh Surendran

Professor Heli Jantunen