volume | PIER Journals

Abstract

In the past, copper served as the material for conductive patches in antennas, but its use was limited due to high costs, susceptibility to fading, bulkiness, environmental sensitivity, and manufacturing challenges. The emergence of graphene nanotechnology has positioned graphene as a viable alternative, offering outstanding electrical conductivity, strength, and adaptability. In this investigation, graphene is employed to fabricate conductive silver nanocomposites. The silver-graphene (Ag/GO) sample exhibits an electrical conductivity of approximately 21.386 S/cm as determined by the four-point probe method. The proposed flexible antenna, characterized by four carefully selected cylindrical shapes were used to construct the antenna patch. for enhanced bandwidth, resonates at 2.45 GHz. It achieves amazing performance characteristics, with a high gain of 11.78 dBi and a return loss greater than -20 dB. Safety considerations are addressed by evaluating the Specific Absorption Rate (SAR). For an input power of 0.5 W, the SAR is calculated to be 1.2 W/kg per 10 g of tissue, affirming the safety of integrating the suggested graphene flexible antenna into flexible devices. In this study, the bending of the antenna was assessed by subjecting the structure to bending at various radii and angles along both the X and Y axes. These findings underscore the promising utility of Ag/GO nanocomposites in the development of flexible antennas for wireless systems.

1. Ibanez-Labiano, Isidoro, M. Said Ergoktas, Coskun Kocabas, Anne Toomey, Akram Alomainy, and Elif Ozden-Yenigun, "Graphene-based soft wearable antennas," Applied Materials Today, Vol. 20, 100727, Sep. 2020.

2. Hasni, Umar, McKenzie E. Piper, Jonathan Lundquist, and Erdem Topsakal, "Screen-printed fabric antennas for wearable applications," IEEE Open Journal of Antennas and Propagation, Vol. 2, 591-598, 2021.

3. Saunders, Simon R. and Alejandro Aragón-Zavala, Antennas and Propagation For Wireless Communication Systems, John Wiley & Sons, 2007.

4. Le, Tu Tuan, Yong-Deok Kim, and Tae-Yeoul Yun, "A triple-band dual-open-ring high-gain high-efficiency antenna for wearable applications," IEEE Access, Vol. 9, 118435-118442, 2021.

5. Karim, Nazmul, Shaila Afroj, Sirui Tan, Kostya S. Novoselov, and Stephen G. Yeates, "All inkjet-printed graphene-silver composite ink on textiles for highly conductive wearable electronics applications," Scientific Reports, Vol. 9, No. 1, 8035, 2019.

6. Abu-Hamdeh, Nidal H., Eydhah Almatrafi, M. Hekmatifar, D. Toghraie, and Ali Golmohammadzadeh, "Molecular dynamics simulation of the thermal properties of the cu-water nanofluid on a roughed platinum surface: simulation of phase transition in nanofluids," Journal of Molecular Liquids, Vol. 327, 114832, 2021.

7. Olabi, Abdul Ghani, Mohammad Ali Abdelkareem, Tabbi Wilberforce, and Enas Taha Sayed, "Application of graphene in energy storage device --- A review," Renewable and Sustainable Energy Reviews, Vol. 135, 110026, 2021.

8. Karim, Nazmul, Shaila Afroj, Andromachi Malandraki, Sean Butterworth, Christopher Beach, Muriel Rigout, Kostya S. Novoselov, Alexander J. Casson, and Stephen G. Yeates, "All inkjet-printed graphene-based conductive patterns for wearable e-textile applications," Journal of Materials Chemistry C, Vol. 5, No. 44, 11640-11648, 2017.

9. Wang, Lu, Xiangfei Kong, Jianlin Ren, Man Fan, and Han Li, "Novel hybrid composite phase change materials with high thermal performance based on aluminium nitride and nanocapsules," Energy, Vol. 238, 121775, 2022.

10. Moghaddam, Amir Rezvani, Zahra Ranjbar, Uttandaraman Sundararaj, Ali Jannesari, and Milad Kamkar, "A novel electrically conductive water borne epoxy nanocomposite coating based on graphene: Facile method and high efficient graphene dispersion," Progress in Organic Coatings, Vol. 136, 105223, 2019.

11. Vinnik, D. A., V. E. Zhivulin, D. P. Sherstyuk, A. Yu Starikov, P. A. Zezyulina, S. A. Gudkova, D. A. Zherebtsov, K. N. Rozanov, S. V. Trukhanov, K. A. Astapovich, et al. "Electromagnetic properties of zinc–nickel ferrites in the frequency range of 0.05-10 GHz," Materials Today Chemistry, Vol. 20, 100460, 2021.

12. Zhao, Jiangshan, Kun Ni, Youpo Su, and Yunxing Shi, "An evaluation of iron ore tailings characteristics and iron ore tailings concrete properties," Construction and Building Materials, Vol. 286, 122968, 2021.

13. Weinreich, Jan, Martín Leandro Paleico, and Jörg Behler, "Properties of α-brass nanoparticles II: Structure and composition," The Journal of Physical Chemistry C, Vol. 125, No. 27, 14897-14909, 2021.

14. Senatore, Adolfo, Giacomo Risitano, Lorenzo Scappaticci, and Danilo D’Andrea, "Investigation of the tribological properties of different textured lead bronze coatings under severe load conditions," Lubricants, Vol. 9, No. 4, 34, 2021.

15. Saeidi, Tale, Ahmed Jamal Abdullah Al-Gburi, and Saeid Karamzadeh, "A miniaturized full-ground dual-band MIMO spiral button wearable antenna for 5G and sub-6 GHz communications," Sensors, Vol. 23, No. 4, 1997, 2023.

16. Whittow, William G., Alford Chauraya, J. C. Vardaxoglou, Yi Li, Russel Torah, Kai Yang, Steve Beeby, and John Tudor, "Inkjet-printed microstrip patch antennas realized on textile for wearable applications," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 71-74, 2014.

17. Scarpello, Maria Lucia, Ilda Kazani, Carla Hertleer, Hendrik Rogier, and Dries Vande Ginste, "Stability and efficiency of screen-printed wearable and washable antennas," IEEE Antennas and Wireless Propagation Letters, Vol. 11, 838-841, 2012.

18. Zhang, Jun, Gui Yun Tian, Adi M. J. Marindra, Ali Imam Sunny, and Ao Bo Zhao, "A review of passive RFID tag antenna-based sensors and systems for structural health monitoring applications," Sensors, Vol. 17, No. 2, 265, 2017.

19. Ahmad, Sarosh, Hichem Boubakar, Salman Naseer, Mohammad Ehsanul Alim, Yawar Ali Sheikh, Adnan Ghaffar, Ahmed Jamal Abdullah Al-Gburi, and Naser Ojaroudi Parchin, "Design of a tri-band wearable antenna for millimeter-wave 5G applications," Sensors, Vol. 22, No. 20, 8012, Oct. 2022.

20. Butt, Arslan Dawood, Jalal Khan, Sarosh Ahmad, Adnan Ghaffar, Ahmed Jamal Abdullah Al-Gburi, and Mousa Hussein, "Single-fed broadband CPW-fed circularly polarized implantable antenna for sensing medical applications," Plos One, Vol. 18, No. 4, e0280042, 2023.

21. Elabd, Rania Hamdy and Ahmed Jamal Abdullah Al-Gburi, "SAR assessment of miniaturized wideband MIMO antenna structure for millimeter wave 5G smartphones," Microelectronic Engineering, Vol. 282, 112098, 2023.

22. Huang, Xianjun, Ting Leng, Mengjian Zhu, Xiao Zhang, JiaCing Chen, KuoHsin Chang, Mohammed Aqeeli, Andre K. Geim, Kostya S. Novoselov, and Zhirun Hu, "Highly flexible and conductive printed graphene for wireless wearable communications applications," Scientific Reports, Vol. 5, No. 1, 1-8, 2016.

23. Al-Gburi, Ahmed Jamal Abdullah, Mohd Muzafar Ismail, Naba Jasim Mohammed, Akash Buragohain, and Khaled Alhassoon, "Electrical conductivity and morphological observation of hybrid filler: Silver-graphene oxide nanocomposites for wearable antenna," Optical Materials, Vol. 148, 114882, 2024.

24. Roy, Amit, Ashim Kumar Biswas, Arnab Nandi, and Banani Basu, "Ultra-wideband flexible wearable antenna with notch characteristics for WLAN applications," Progress In Electromagnetics Research C, Vol. 129, 143-155, 2023.

25. Jaakkola, Kaarle, Vladimir Ermolov, P. G. Karagiannidis, S. A. Hodge, Lucia Lombardi, Xiao Zhang, R. Grenman, Henrik Sandberg, Antonio Lombardo, and Andrea C. Ferrari, "Screen-printed and spray coated graphene-based RFID transponders," 2D Materials, Vol. 7, No. 1, 015019, 2019.

26. Xu, L. Y., G. Y. Yang, H. Y. Jing, J. Wei, and Y. D. Han, "Ag-graphene hybrid conductive ink for writing electronics," Nanotechnology, Vol. 25, No. 5, 055201, 2014.

27.IEC/IEEE International Standard Determining the Peak Spatial-Average Specific Absorption Rate (SAR) in the Human Body from Wireless Communications Devices, 30 MHz to 6 GHz-Part 1: General Requirements for Using the Finite-Difference Time-Domain (FDTD) Method for SAR Calculations, 1-86, IEC/IEEE 62704-1:2017; IEEE: Piscataway, NJ, USA, 2017.

Dr. Ahmed Jamal Abdullah Al-Gburi

Dr. Mohd Muzafar Ismail

Dr. Naba Jasim Mohammed

Dr. Thamer A. H. Alghamdi