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An Metamaterial Inspired Antenna with CSRR and Rectangular SRR Based Flexible Antenna with Jeans Gap Filled for Wireless Body Area Network

By Siddhant Goswami and Deepak C. Karia
Progress In Electromagnetics Research C, Vol. 122, 165-181, 2022


In this paper, a flexible compact Jeans gap filled metamaterial inspired antenna is proposed to operate at 2.4 GHz in the Industrial Scientific and Medical (ISM) band. This designed antenna is flexible having size of about 27×23 mm2 with substrate of thickness 0.3 mm. The proposed antenna comprises two complementary split ring resonators at ground plane and one circular ring and complementary rectangular split ring resonator. The top patch consists of two rectangular split ring resonators etched inside the rectangular patch. The use of SRR and CSRR on top and bottom of patch has helped to reduce the size of antenna along with maintaining performance of antenna. Further enhancements are done to make it jeans gap filled antenna with jeans filled between main patch and superstrate. The superstrate top patch consists of a square EBG structure. The simulation results have shown an increase in return loss due to the use of square EBG structure on superstrate. The simulated directivity obtained on antenna is 2.0775 dB. The measured and simulated results are in a good agreement. The motivation of this work is to design a compact metamaterial based antenna for wireless body area network with gap coupled jeans material to nullify effects of human body. Effects of air gap coupled and jeans gap coupled are analyzed in terms of performance. While the final antenna (Antenna-4) is designed, several iterations are tried to optimize and maintain good performance. Step 1 (Antenna-1) consists of two complementary split ring resonators along with a circular ring placed in ground plane with thickness of polyamide substrate as 0.3 mm. Step 2 (Antenna-2) consists of two split ring resonators along with a circular ring placed in ground plane. An air gap coupled superstrate is designed having gap between main patch and superstrate as 1 mm. Step 3 (Antenna-3) has the same configuration as Antenna-2, and the only difference is the air gap between main patch and superstrate which is replaced by jeans material. Step 4 (Antenna-4) is the final designed antenna with miniaturized size of 27×23 mm2 as compared with previous antenna configurations. This research work has identified the challenges involved for designing an antenna in a wireless body area network. Practical aspect of design needs to consider: a) Bending effect on performance as movement and physiological changes might affect the performance. b) Performance degrades when antenna comes in contact with human body. Bending Effect: This work has also analyzed effect of bending on return loss. For final designed antenna (Antenna-4) maximum bending up to bend 30˚ is possible. Further bending would break the substrate. After maximum bending, the measured return loss is about -16.7071 dB at 2.28 GHz. Body area network: The designed final antenna (Antenna-4) is tested on different parts of human body such as human-arm and leg. No major difference is seen on return loss when it is tested on different parts of body. The designed final antenna (Antenna-4) is tested on direct contact with human-arm as well as with different cloths (cotton jeans, cotton, curtain cloth, floor cloth, polyester and Turkish cloth) having different permittivities with the distance between cloth and antenna as 0 cm and 1 cm. Wearable antennas should be carefully constructed to avoid causing harm to the human body when being worn. The Low Specific Absorption Rate is one of the criteria that should be considered while developing a wearable antenna. The maximum allowable SAR limit is 1.6 W/kg. The specific absorption rate for Antenna-4 is 0.2 W/kg when input power is 1 watt and is 0.036 W/kg when input power is 100 milli watt. The results obtained show that the proposed antenna is both safe and acceptable for use in compliance with the World Health Organization's ICNIRP requirements.


Siddhant Goswami and Deepak C. Karia, "An Metamaterial Inspired Antenna with CSRR and Rectangular SRR Based Flexible Antenna with Jeans Gap Filled for Wireless Body Area Network," Progress In Electromagnetics Research C, Vol. 122, 165-181, 2022.


    1. Iqbal, A., A. Smida, A. J. Alazemi, M. I. Waly, N. Khaddaj Mallat, and S. Kim, "Wideband circularly polarized MIMO antenna for high datawearable biotelemetric devices," IEEE Access, Vol. 8, 17935-17944, 2020, doi: 10.1109/ACCESS.2020.2967397, http://dx.doi.org/10.1109/ACCESS.2020.2967397.

    2. Smida, A., A. Iqbal, A. J. Alazemi, M. I. Waly, R. Ghayoula, and S. Kim, "Wideband wearable antenna for biomedical telemetry applications," IEEE Access, Vol. 8, 15687-15694, 2020, doi: 10.1109/ACCESS.2020.2967413, http://dx.doi.org/10.1109/ACCESS.2020.296741.

    3. Chaturvedi, D. and S. Raghavan, "A compact metamaterial-inspired antenna for WBAN application," Wirel. Pers. Commun., Vol. 105, No. 4, 1449-1460, 2019, doi: 10.1007/s11277-019-06153-z, http://dx.doi.org/10.1007/s11277-019-06153-z.

    4. Goswami, S. and D. C. Karia, "A metamaterial-inspired circularly polarized antenna for implantable applications," Engineering Reports, Vol. 2, No. 10, e12251, doi: 10.1002/eng2.12251, http://dx.doi.org/10.1002/eng2.12251.

    5. Soh, P. J., G. A. Vandenbosch, S. L. Ooi, and N. H. M. Rais, "Design of a broadband all-textile slotted PIFA," IEEE Transactions on Antennas and Propagation, Vol. 60, No. 1, 379-384, 2011.

    6. Hazarika, B. and B. Basu, "Multi-layered low-profile monopole antenna using metamaterial for wireless body area networks," 2019 International Conference on Automation, Computational and Technology Management (ICACTM), 431-435, 2019.

    7. Hu, B., G. P. Gao, L. L. He, X. D. Cong, and J. N. Zhao, "Bending and on-arm effects on a wearable antenna for 2.45 GHz body area network," IEEE Antennas and Wireless Propagation Letters, Vol. 15, 378-381, 2015.

    8. Bouazizi, A., G. Zaibi, A. Iqbal, A. Basir, M. Samet, and A. A. Kachouri, "Dual-band caseprinted planar inverted-F antenna design with independent resonance control for wearable short range telemetric systems," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 8, e21781, 2019.

    9. Iqbal, A., A. J. Alazemi, and N. Khaddaj Mallat, "Slot-DRA-based independent dual-band hybrid antenna for wearable biomedical devices," IEEE Access, Vol. 7, 184029-184037, 2019, doi: 10.1109/ACCESS.2019.2960443, http://dx.doi.org/10.1109/ACCESS.2019.2960443.

    10. Elfergani, I., et al., "Low-profile and closely spaced four-element MIMO antenna for wireless body area networks," Electronics, Vol. 9, No. 2, 258, 2020, doi: 10.3390/electronics9020258, http://dx.doi.org/10.3390/electronics9020258.

    11. Aziz Ul Haq, M. and S. Koziel, "On topology modifications for wideband antenna miniaturization," AEU --- International Journal of Electronics and Communications, Vol. 94, 215-220, 2018, doi: https://doi.org/10.1016/j.aeue.2018.07.006, http://dx.doi.org/https://doi.org/10.1016/j.aeue.2018.07.006.

    12. Ali, T. and R. C. Biradar, "A compact multiband antenna using λ/4 rectangular stub loaded with metamaterial for IEEE 802.11N and IEEE 802.16E," Microwave and Optical Technology Letters, Vol. 59, No. 5, 1000-1006, 2017, doi: 10.1002/mop.30454, http://dx.doi.org/10.1002/mop.30454.

    13. Ajetrao, K. and A. Dhande, "Study of metamaterials and analysis of split ring resonators to design multiband and UWB antennas," GRENZE International Journal of Engineering and Technology, 2, 2016, doi: 10.21647/gijet/2016/v2/i2/48895, http://dx.doi.org/10.21647/gijet/2016/v2/i2/48895.

    14. Ali, T., A. Mohammad Saadh, R. Biradar, J. Anguera, and A. Andújar, "A miniaturized metamaterial slot antenna for wireless applications," AEU --- International Journal of Electronics and Communications, Vol. 82, 368-382, 2017, doi: https://doi.org/10.1016/j.aeue.2017.10.005, http://dx.doi.org/https://doi.org/10.1016/j.aeue.2017.10.005.

    15. Zhu, C., et al., "Electrically small metamaterial-inspired tri-band antenna with meta-mode," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 1738-1741, 2015.

    16. Raval, F., Y. Kosta, and H. Joshi, "Reduced size patch antenna using complementary split ring resonator as defected ground plane," AEU --- International Journal of Electronics and Communications, Vol. 69, No. 8, 1126-1133, 2015, doi: https://doi.org/10.1016/j.aeue.2015.04.013, http://dx.doi.org/https://doi.org/10.1016/j.aeue.2015.04.013.

    17. Lee, J. G. and J. H. Lee, "SAR reduction using integration of PIFA and AMC structure for pentaband mobile terminals," International Journal of Antennas and Propagation, Vol. 2017, Article ID 6196721, 2017.

    18. Kim, S., K. Kwon, and J. Choi, "A compact circularly-polarized antenna with enhanced bandwidth for Wban applications," Microwave and Optical Technology Letters, Vol. 55, No. 8, 1738-1741, 2013.

    19. Sultan, K. S., H. H. Abdullah, and E. A. F. Abdallah, "Low-SAR miniaturized handset antenna using EBG," Microstrip Antennas: Trends in Research on, Vol. 1, 127, 2017.

    20. Chen, Y. S. and T. Y. Ku, "A low-profile wearable antenna using a miniature high impedance surface for smartwatch applications," IEEE Antennas and Wireless Propagation Letters, Vol. 15, 1144-1147, 2015.

    21. Igarashi, A. and Y. Okano, "Basic research of reduction technique for the microwave exposure with conductive cloth," 2010 Asia-Pacific Microwave Conference, 1364-1367, 2010.

    22. Sultan, K. S., H. H. Abdullah, E. A. Abdallah, and E. A. Hashish, "Low-SAR, miniaturized printed antenna for mobile, ISM, and WLAN services," IEEE Antennas and Wireless Propagation Letters, Vol. 12, 1106-110, 2013.

    23. Gómez-Villanueva, R., H. Jardón-Aguilar, and R. L. Y. Miranda, "State of the art methods for low SAR antenna implementation," Proceedings of the Fourth European Conference on Antennas and Propagation, 1-4, 2010.

    24. Wang, M., et al., "Investigation of SAR reduction using flexible antenna with metamaterial structure in wireless body area network," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 6, 3076-3086, 2018.

    25. Lakshmanan, R. and S. K. Sukumaran, "Flexible ultra wide band antenna for WBAN applications," Procedia Technology, Vol. 24, 880-887, Part of Special Issue: International Conference on Emerging Trends in Engineering, Science and Technology (ICETEST --- 2015), 2016, doi: https://doi.org/10.1016/j.protcy.2016.05.149, http://dx.doi.org/https://doi.org/10.1016/j.protcy.2016.05.149.

    26. Al-Sehemi, A. G., A. A. Al-Ghamdi, N. T. Dishovsky, N. T. Atanasov, and G. L. Atanasova, "Flexible and small wearable antenna for wireless body area network applications," Journal of Electromagnetic Waves and Applications, Vol. 31, No. 11-12, 1063-1082, 2017.

    27. Agarwal, K., Y. X. Guo, and B. Salam, "Wearable AMC backed near-endfire antenna for onbody communications on latex substrate," IEEE Transactions on Components, Packaging and Manufacturing Technology, Vol. 6, No. 3, 346-358, 2016.

    28. Mantash, M., A. C. Tarot, S. Collardey, and K. Mahdjoubi, "Investigation of flexible textile antennas and AMC reflectors," International Journal of Antennas and Propagation, Vol. 2012, Article ID 236505, 2012.

    29. Lago, H., P. J. Soh, M. F. Jamlos, N. Shohaimi, S. Yan, and G. A. Vandenbosch, "Textile antenna integrated with compact AMC and parasitic elements for WLAN/WBAN applications," Applied Physics A, Vol. 122, No. 12, 1-6, 2016.

    30. Zhang, K., P J. Soh, and S. Yan, "Meta-wearable antennas --- A review of metamaterial based antennas in wireless body area networks," Materials, Vol. 14, No. 1, 149, 2021.

    31. Alhawari, A. R, A. Almawgani, A. T. Hindi, H. Alghamdi, and T. Saeidi, "Metamaterial-based wearable flexible elliptical UWB antenna for WBAN and breast imaging application," AIP Advances, Vol. 11, No. 1, 015128, 2021.

    32. Iqbal, A., et al., "Electromagnetic bandgap backed millimeter-wave MIMO antenna for wearable applications," IEEE Access, Vol. 7, 111135-111144, 2019, doi: 10.1109/ACCESS.2019.2933913, http://dx.doi.org/10.1109/ACCESS.2019.2933913.

    33. Keshwani, V. R., P. P. Bhavarthe, and S. S. Rathod, "Eight shape electromagnetic band gap structure for bandwidth improvement of wearable antenna," Progress In Electromagnetics Research C, Vol. 116, 37-49, 2021.

    34. Verma, A., R. K. Arya, R. Bhattacharya, and S. N. Raghava, "Compact PIFA antenna with high gain and low SAR using AMC for WLAN/C-band/5G applications," IETE Journal of Research, Vol. 1, No. 11, 2021.