Skip to content
Licensed Unlicensed Requires Authentication Published by De Gruyter September 30, 2020

Design of an aperture coupled MIMO antenna for on-body communication and performance enhancement with dielectric back reflector

  • Vipan Kumar Gupta ORCID logo EMAIL logo and Ashima Gupta
From the journal Frequenz

Abstract

Compact antennas with robust on-body performance are achieving more interest for wearable sensor nodes. In this paper, a modified aperture coupled multiple input multiple output (MIMO) antenna operating at 2.45 GHz industrial scientific and medical (ISM) band is presented for wearable devices. 8-shaped radiator with L-shaped ground slot is used to miniaturize the antenna dimensions. A dielectric reflector is added below the antenna to reduce the back radiations towards the body tissue. On-body performance is analysed on three layered equivalent tissue phantom model. Antenna shows reflection coefficient of −40 dB, efficiency of 58% and directivity of 6.7 dBi when operated in close proximity of body tissue with dielectric reflector. unidirectional radiation pattern and low specific absorption rate makes antenna suitable for on-body communication. Further, diversity performance is measured in terms of envelope correlation coefficient (ECC) and diversity gain (DG). Value of ECC is 0.045 and DG is 9.7 dB at 2.45 GHz. Antenna robustness is examined by bending the structure along x-axis. Performance of the proposed structure makes it a suitable candidate for on-body communication.


Corresponding author: Vipan Kumar Gupta, Sri Sai College of Engineering and Technology, Badhani, Pathankot, India, E-mail: .

  1. Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

References

[1] A. Kiourti and K. S. Nitika, “A review of implantable patch antennas for biomedical telemetry: Challenges and solutions,” IEEE Antenn. Propag. Mag., vol. 54, pp. 210–227, 2012.https://doi.org/10.1109/map.2012.6293992.Search in Google Scholar

[2] A. Gupta, A. Kansal, and P. Chawla, “Design of a patch antenna with square ring-shaped-coupled ground for on/off body communication,” Int. J. Electron., vol. 106, no. 12, pp. 1814–1828, 2019.https://doi.org/10.1080/00207217.2019.1625970.Search in Google Scholar

[3] P. H. Samal, P. J. Soh, and G. A. E. Vandenbosch, “UWB all textile antenna with full ground plane for off-body WBAN communications,” IEEE Trans. Antenn. Propag., vol. 62, no. 1, pp. 102–108, 2014. https://doi.org/10.1109/tap.2013.2287526.Search in Google Scholar

[4] A. Arif, M. Zubair, M. Ali, M. U. Khan, and M. Q. Mehmood, “A Compact low-profile fractal antenna for wearable on-body WBAN applications,” IEEE Antenn. Wireless Propag. Lett., vol. 18, no. 5, pp. 981–985, 2019. https://doi.org/10.1109/lawp.2019.2906829.Search in Google Scholar

[5] R. Moro, S. Agneessens, H. Rogier, and M. Bozzi, “Circularly-polarized cavity-backed wearable antenna in SIW technology,” IET Microw., Antennas Propag., vol. 12, no. 1, pp. 127–131, 2018. https://doi.org/10.1049/iet-map.2017.0271.Search in Google Scholar

[6] A. Al-Sehemia, A. Al-Ghamdic, N. Dishovsky, N. Atanasove, and G. Atanasovae, “On-body investigation of a compact planar antenna on multilayer polymer composite for body-centric wireless communications,” Int. J. Electron. Commun., vol. 72, pp. 184–191, 2017. https://doi.org/10.1016/j.aeue.2017.07.029.Search in Google Scholar

[7] E. F. M. Hussin, P. J. Soh, M. F. Jamlos, H. Lago, and A. A. Al-Hadi, “Wideband microstrip-based wearable antenna backed with full ground plane,” RF and Microwave computer Aided Engineering, vol. 29, no. 7, pp. 1–12, 2019.https://doi.org/10.1002/mmce.21739.Search in Google Scholar

[8] G. Gao, B. Hu, S. Wang, and C. Yang, “Wearable planar inverted-F antenna with stable characteristics and low specific absorption rate,” Microw. Opt. Technol. Lett., vol. 60, pp. 876–882, 2018. https://doi.org/10.1002/mop.31069.Search in Google Scholar

[9] A. Mersani, O. Lotfi, and J. M. Ribero, “Design of textile antenna with artificial magnetic conductor for wearable applications,” Microw. Opt. Technol. Lett., vol. 60, pp. 1343–1349, 2018. https://doi.org/10.1002/mop.31158.Search in Google Scholar

[10] A. Y. I. Ashyap, Z. Abidin, Z. Dahlan, H. A. Majid, and G. Saleh, “Metamaterial inspired fabric antenna for wearable applications,” Int. J. RF Microw. Computer-Aided Eng., vol. 29, 2018, https://doi.org/10.1002/mmce.21640.Search in Google Scholar

[11] J. Zhang, S. Yan, and G. A. E. Vandebosch, “A miniature feeding network for aperture-coupled wearable antennas,” IEEE Trans. Antenn. Propag., vol. 65, no. 5, pp. 2650–2654, 2017. https://doi.org/10.1109/tap.2017.2677262.Search in Google Scholar

[12] G. P. Gao, B. Hu, X. L. Tian, Q. L. Zhao, and B. T. Zhang, “Experimental study of a wearble aperture-coupled patch antenna for wireless body area network,” Microw. Opt. Technol. Lett., vol. 59, no. 4, pp. 761–766, 2017. https://doi.org/10.1002/mop.30408.Search in Google Scholar

[13] A. K. Biswas and U. Chakraborty, “Investigation on decoupling of wideband wearable multiple-input multiple-output antenna elements using microstrip neutralisation line,” RF and Microw Computer Aided Eng., vol. 29, no. 7, pp. 1–11, 2019. https://doi.org/10.1002/mmce.21723.Search in Google Scholar

[14] L. Qu, H. Piao, Y. Qu, and H. Kim, “Circularly polarised MIMO ground radiation antennas for wearable devices,” IET Electron Lett., vol. 54, no. 4, pp. 189–190, 2018. https://doi.org/10.1049/el.2017.4348.Search in Google Scholar

[15] W. Dingliang, H. Yang, O. M. Max, and W. H. Z. Hanyang, “A compact and lo-profile MIMO antenna using a miniature circular high-impedance surface for wearable applications,” IEEE Trans. Antenn. Propag., vol. 66, no. 1, pp. 96–104, 2018.https://doi.org/10.1109/TAP.2017.2773465.Search in Google Scholar

[16] S. Chouhan, D. K. Panda, P. K. Khushwah, and P. K. Mishra, “Octagonal-shaped wideband MIMO antenna for human interface device and S-band applications,” Int. J. Microw. Wireless Technol., vol. 11, no. 3, pp. 287–296, 2019. https://doi.org/10.1017/s1759078718001381.Search in Google Scholar

[17] Z. Y. Chen, Y. M. Gao, and M. Du, “Propagation characteristics of electromagnetic of multiple tissue interfaces in wireless deep implant communication,” IET Microw., Antennas Propag., vol. 12, no. 13, pp. 2034–2040, 2018. https://doi.org/10.1049/iet-map.2018.5315.Search in Google Scholar

[18] C. A. Balanis and Hobonken, Antenna Theory Analysis and Design, 3rd ed., New Jersy, A John Wiley & Sons, Inc. Publication, 2005.Search in Google Scholar

[19] Q. Rao, T. A. Denidni, and R. H. Johnston, “Dielectric reflector backed aperture-coupled antennas for reduced back radiation,” IEEE Trans. Electromagn. C., vol. 48, no. 2, pp. 287–291, 2006. https://doi.org/10.1109/temc.2006.874088.Search in Google Scholar

[20] R. F. Harrington, Field Computation by Moment Methods, New York, Macmillan, 1968.Search in Google Scholar

[21] J. V. Bladel, Electromagnetic Fields, New York, Hemisphere, 1985.Search in Google Scholar

[22] A. Gupta, A. Kansal, and P. Chawla, “Design of A Wearable MIMO antenna deployed with an inverted U-shaped ground stub for diversity performance enhancement,” International Journal of Microwave and Wireless Technologies, 2020, https://doi.org/10.1017/S1759078720000471.Search in Google Scholar

[23] I. Kwak, Sang, D.-U Sim, J. H. Kwon, and Y. J. Yoon, “Design of PIFA with metamaterials for body-SAR reduction in wearable applications,” IEEE Trans. Electromagn. C., vol. 59, no. 1, pp. 297–300, 2016.https://doi.org/10.1109/TEMC.2016.2593493.Search in Google Scholar

[24] A. Al-Sehemia, A. Al-Ghamdic, N. Dishovsky, N. Atanasove, and G. Atanasovae, “Flexible and small wearable antenna for wireless body area network applications,” J. Electromagn. Waves Appl., vol. 31, nos 11-12, pp. 1063–1082, 2017. https://doi.org/10.1080/09205071.2017.1336492.Search in Google Scholar

[25] K. Varshini and T. R. Rao, “Investigations on SAR and thermal effects of a body wearable microstrip antenna,” Wireless Pers. Commun., vol. 96, no. 3, pp. 3385–3401, 2017.https://doi.org/10.1007/s11277-017-4059-9.Search in Google Scholar

[26] P. J. Soh, G. Vandenbosch, F. H. Wee, A. V. Bosch, M. Martinez-Vazquez, and D. Schreurs, “Specific absorption rate (SAR) evaluation of textile antennas,” IEEE Antenn. Propag. Mag., vol. 57, no. 2, pp. 229–240, 2015. https://doi.org/10.1109/map.2015.2414671.Search in Google Scholar

[27] V. Kumari, G. Sheoran, and T. Kanumuri, “SAR analysis of directive antenna on anatomically real breast phantoms for microwave holography,” Microw. Opt. Technol. Lett., vol. 62, no. 1, pp. 466–473, 2020. https://doi.org/10.1002/mop.32037.Search in Google Scholar

[28] T. Jovanche and A. K. Skrivervik, “Comparison of SAR of UHF wearable antennas,”in 10th European Conference on Antennas and Propagation (EuCAP), IEEE, 2016, pp. 1–4.Search in Google Scholar

[29] D. G. Choi, C. S. Shin, N. Kim, and H. S. Shin, “Design and SAR analysis of broadband PIFA with triple band,” PIERS Online, vol. 1, no. 3, pp. 290–293, 2005.https://doi.org/10.2529/piers041212211650.Search in Google Scholar

[30] M. A. Jamlos, W. A. Mustafa, W. Khairunizam, I. Zunaidi, Z. M. Razlan, and A. B. Shahriman, “Tumor detection via specific absorption rate technique using ultra-wideband antenna,” in IOP Conference Series: Materials Science and Engineering, vol. 557, no. 1, IOP Publishing, 2019, p. 1012024.10.1088/1757-899X/557/1/012002Search in Google Scholar

Supplementary material

The online version of this article offers supplementary material (https://doi.org/10.1515/freq-2020-0038).

Received: 2020-04-02
Accepted: 2020-09-16
Published Online: 2020-09-30
Published in Print: 2021-01-27

© 2020 Walter de Gruyter GmbH, Berlin/Boston

Downloaded on 28.3.2024 from https://www.degruyter.com/document/doi/10.1515/freq-2020-0038/pdf
Scroll to top button