CONDUCTIVE TEXTILE EBG UNIT CELL AMC SURFACE ANALYSIS FOR 2.45GHZ AND 5.5GHZ BAND OF FREQUENCIES

EBG (Electromagnetic Bandgap) metamaterials are unique artificially designed structures which possess various attractive properties of electromagnetic radiations. The property of High Impedance Surface (HIS) is used in modify the electromagnetic radiations which does not occur naturally. This most promising application of artificially formed structure is in wearable microstrip patch antenna designing. Where the antenna has to be a part of our clothing for various applications such as tracking, Personal Area Network communication, navigation, patient monitoring, mobile computing and public safety etc. where in such application conductive textile materials has to be used. Microstrip patch antenna conventionally designed on the solid dielectric substrate but when the antenna has to be developed on textile to make it wearable the dielectric and conductive material replaced by the textile. Though the textile microstrip patch antenna has to be worn on human body and due to the close vicinity of human tissues the performance parameters of antenna degrades and most importantly the antenna radiations are being absorbed by the human tissues. This leads to increase the safety range of Specific Absorption Rate (SAR) of antenna. This paper describes design, development and parametric analysis of the EBG surface unit cell, which will absorb the back radiations on human body generated by the textile microstrip patch antenna.

Keywords:

EBG, HIS, Artificial Magnetic Conductor, Microstrip patch antenna, wearable antenna, SAR, Textile Conductive Fabric

1. P. De Maagt, R. Gonzalo, J.C.Vardaxoglou and J.M.Baracco, “Photonic bandgap antennas and components for microwave and (sub)millimeter wave applications,” in Special Issue on Metamaterials IEEE Transactions on Antennas and Propagation, vol. AP-51, no. 10, pp. 2667- 2677, (2003)
2. Y.R.Lee, A.Chauraya, D.Lockeyr and J.C.Vardaxoglou., “Dipole and tripole metallodielectric photonic bandgap (MPBG) structures for microwave filter and antenna applications,” in IEEE Proc. Optoelectron, vol. 127, no. 6, pp. 395-400 ,( 2000)
3. Y.E.Erdemli, K.Sertel, R.A.Gilbert, D.E.Wright, J.Volakis, “Frequency Selective Surfaces to enhance performance of broad-band reconfigurable arrays,” IEEE Transactions on Antennas and Propagation, vol. 50, no. 12, pp. 1716-1724 , (2002)
4. A.P.Feresidis, G.Goussetis, S.Wang and J.C.Vardaxoglou, “Artificial magnetic surfaces and their application to low profile high-gain planar antennas,” in IEEE Transactions on Antennas and Propagation, vol. 53, no. 1, pp. 209-215 , (2005)
5. B. A. Mouris et al., “On the Increment of the Bandwidth of Mushroom-Type EBG Structures with Glide Symmetry,” in IEEE Transactions on Microwave Theory and Techniques, vol. 68, no. 4, pp. 1365 – 1375, (2020)
6. Z. Yang et al. , “Metasurface-based wideband, low-profile, and high-gain antenna,” in IET Microwaves, Antennas & Propagation, vol. 13, no. 4, pp. 436 – 441 , (2019)
7. A. Agrawal, P. K. Singhal, and A. Jain, “Design and Optimization of a Microstrip Patch Antenna for Increased Bandwidth,” in International Journal of Microwave and Wireless Technologies, vol. 5, no. 4, pp. 529–535 , (2013)
8. W. An et al., “Low-profile and wideband dipole antenna with unidirectional radiation pattern for 5G,” in IEICE Electronics Express, vol. 15, no. 13, pp. 1 – 6 , (2018)
9. Feng, M.; Li, Y.; Zhang, J.; Han, Y.; Wang, J.; Ma, H.; Qu, S. Wide-angle flat metasurface corner reflector. Appl. Phys. Lett. 2018, 113, 143504.(2018)
10. Bilotti, F.; Sevgi, L. Metamaterials: Definitions, properties, applications, and FDTD-based modeling and simulation (invited paper). Int. J. RF Microw. Comput. Aided Eng. 2012, 22, 422–438, (2012)
11. Saifullah, Y.; Waqas, A.B.; Yang, G.M.; Xu, F. Multi-bit dielectric coding metasurface for EM wave manipulation and anomalous reflection. Opt. Express 2020, 28, 1139–1149,(2020)