Main Article Content
A compact high-isolation diversity and circular polarized (CP) multiple-input multiple-output (MIMO) fabric antenna for 2.4 GHz ISM band applications is presented. A metamaterial (MTM)-inspired radiating element is used for the miniaturization of the presented fabric antenna. The proposed antenna is fabricated on a denim substrate and has a dimension of 58 mm x 23 mm x 1.6 mm. The circular polarization is achieved by trimming the two diagonal corners of the radiating elements. A defected ground structure (DGS) comprising two U-slots is placed underneath each radiator to increase the bandwidth of the presented antenna. The isolation characteristics between the two antenna elements are increased by 20 dB by cutting a slit in a ground plane. The proposed CP-MIMO antenna incorporates an artificial magnetic conductor (AMC) layer to limit backward radiation towards the human body and hence enhances the gain. This antenna has been created on a denim substrate with permittivity εr =1.6 and 1.6 mm thickness. The proposed antenna offers a fractional bandwidth of 6.6 % (2.38-2.54 GHz), and an impedance bandwidth about 160 MHz. The antenna has a peak gain of 2.5 dBi without AMC and 4.5 dBi with AMC. To validate the simulation results, a prototype for the proposed antenna has been fabricated and experimentally characterized. Due to its small size, low specific absorption rate (SAR), ease of integration, and robustness, this antenna is a good option for wireless body area network (WBAN) applications.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
M. S. Shakhirul and A. H. Ismail, "Textile antenna with simultaneous frequency and polarization reconfiguration for WBAN," IEEE Access, vol.6, no.6, pp.7350-7358, Dec 2018.
F. A. Dicandia, S. Genovesi, and A. Monorchio, "Analysis of the performance enhancement of MIMO systems employing circular polarization," IEEE Trans. Antennas Propag.,vol. 65, no. 9, pp. 4824-4835, Sep 2017.
A. Iqbal, A. Smida, A. J. Alazemi, M. I. Waly, N. K. Mallat, and S. Kim, "Wideband circularly polarized MIMO antenna for high data wearable biotelemetric devices," IEEE Access, vol. 8, pp. 17935-17944, Jan 2020.
S. Velan and M. Kanagasabai, "Dual-band EBG integrated monopole antenna deploying fractal geometry for wearable applications," IEEE Antennas and Wireless Propagation Letters, vol. 14, no. 2, pp. 249-252, Sept 2015. doi:10.1109/LAWP.2014.2360710
A. Mersani, J. Ribero and O. Lotfi (2018, March).Improved radiation performance of textile antenna using AMC surface. Presented at 15th International Multi-Conference on Systems, Signals, and Devices (SSD), pp.627-631.
A. Mersani, J. Ribero and O. Lotfi, "Design of a textile antenna with artificial magnetic conductor for wearable applications," Microwave and Optical Technology Letters, vol 60, pp.1343-134, June 2018.
S. Yan, P. J. Soh and G. A. E. Vandenbosch, "Low-profile dual-band textile antenna with artificial magnetic conductor plane," in IEEE Transactions on Antennas and Propagation, vol. 62, no. 12, pp. 6487-6490, Dec 2014.
K. Wang and J. Li,Jeans(2018, Dec).Textile Antenna for Smart Wearable Antenna. Presented at 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE), pp.1-3.
T. Hassan, M. U. Khan, H. Attia, and M. S. Sharawi, "An FSS based correlation reduction technique for MIMO antennas," IEEE Trans. Antennas Propag., vol.66, no.9, pp.4900-4905, May 2018.
L. Qu, H. Piao, Y. Qu, H.-H. Kim, and H. Kim, "Circularly polarised MIMO ground radiation antennas for wearable devices," Electronics Letters, vol.54, no.4, pp.189-190, Dec 2018.
H. Li, S. Sun, B. Wang, and F. Wu, "Design of compact single-layer textile MIMO antenna for wearable applications," IEEE Trans. Antennas Propag., vol. 66, no. 6, pp.3136-3141, March 2018.
A.K.Biswas, and U. Chakraborty, "Compact wearable MIMO antenna with improved port isolation for ultra-wideband applications", IET Microw. Antennas Propag, vol. 13, no. 4, pp. 498-504, Feb 2019.
S. Roy, S.Ghosh, S.Pattanayak, and U.Chakarborty, "Dual-polarized textile-based two/four element MIMO antenna with improved isolation for dual wideband application", Int J RF Microw Computer Aided Eng., pp.1-20, May 2020.
T. Ashtankar and N.K. Choudhari, "Design and analysis of a compact MIMO textile antenna with improved mutual coupling for WBAN applications," IOSR Journal of Electrical and Electronics Engineering, vol. 15, no. 2, pp. 8-13, April 2020.
H. Jiang and J. Ding, "Broadband extremely close spaced 5G MIMO antenna with mutual coupling reduction using metamaterial-inspired superstrate" Opt Express. vol.27, no.3, pp.3472-3482, Feb 2019.
S. Kumar and D. Nandan, "Wideband circularly polarized textile MIMO antenna for wearable applications," IEEE Access, vol. 9, pp. 108601-108613, July 2021.