Compact Wide-Band and Low Mutual Coupling MIMO Metamaterial Antenna using CPW Feeding for LTE/Wimax Applications

Duong Thi Thanh Tu, Nguyen Tuan Ngoc, Vu Van Yem


In this paper, a metamaterial antenna is designed by using coplanar waveguide (CPW) feeding to obtain wideband and compact size. The Multiple-Input Multiple-Output (MIMO) antenna is constructed by placing side-by-side two single metamaterial antennas which are based on the modified composite right/left handed (CRLH) model. The proposed antenna covers 22% of the experimental bandwidth for both cases of single and MIMO antennas. Implemented in FR4 substrate with the height of 1.6 mm, the antenna is compact in size with radiating patch dimension of 5.75x14 mm2 at 3.5 GHz resonant frequency that is suitable for Long Term Evolution (LTE)/Wimax applications in handheld devices. Furthermore, the combination of Defected Ground Structure (DGS) and enlarged ground of coplanar structure has solved the challenge of mutual coupling between elements in the MIMO metamaterial antenna using CPW feeding. With the distance of 0.46\lambda_0 between feeding points, the MIMO antenna obtains the high isolation of under −20 dB for a huge bandwidth with a good agreement between simulations and measurements.

DOI: 10.32913/rd-ict.vol2.no15.676


Multiple-input multiple-output (MIMO), metamaterial antenna, coplanar waveguide (CPW), low mutual coupling, defected ground structure (DGS).


G. J. Foschini and M. J. Gans, “On limits of wireless communications in a fading environment when using multiple antennas,” Wireless Personal Communications, vol. 6, no. 3, pp. 311–335, 1998.

A. Jamil, M. Z. Yusoff, and N. Yahya, “Current issues and challenges of MIMO antenna designs,” in Proceedings of the International Conference on Intelligent and Advanced Systems (ICIAS). IEEE, 2010, pp. 1–5.

M.-C. Huynh and W. Stutzman, “Ground plane effects on planar inverted-f antenna (PIFA) performance,” IEE Proceedings-Microwaves, Antennas and Propagation, vol. 150, no. 4, pp. 209–213, 2003.

M. C. Scardelletti, G. E. Ponchak, S. Merritt, J. S. Minor, and C. A. Zorman, “Electrically small folded slot antenna utilizing capacitive loaded slot lines,” in Proceedings of the Radio and Wireless Symposium. IEEE, 2008, pp. 731–734.

F. Merli, L. Bolomey, J.-F. Zurcher, G. Corradini, E. Meurville, and A. K. Skrivervik, “Design, realization and measurements of a miniature antenna for implantable wireless communication systems,” IEEE Transactions on Antennas and Propagation, vol. 59, no. 10, pp. 3544–3555, 2011.

C. Caloz and T. Itoh, Electromagnetic metamaterials: transmission line theory and microwave applications. John Wiley & Sons, 2005.

N. Engheta and R. W. Ziolkowski, Metamaterials: physics and engineering explorations. John Wiley & Sons, 2006.

R. N. Simons, Coplanar Waveguide: circuits, components, and systems. Wiley, New York, 2001.

S. Xiao, M.-C. Tang, Y.-Y. Bai, S. Gao, and B.-Z. Wang, “Mutual coupling suppression in microstrip array using defected ground structure,” IET microwaves, antennas & propagation, vol. 5, no. 12, pp. 1488–1494, 2011.

F.-G. Zhu, J.-D. Xu, and Q. Xu, “Reduction of mutual coupling between closely-packed antenna elements using defected ground structure,” Electronics Letters, vol. 45, no. 12, pp. 601–602, 2009.

N. K. Kiem, H. N. B. Phuong, Q. N. Hieu, and D. N. Chien, “A novel metamaterial mimo antenna with high isolation for wlan applications,” International Journal of Antennas and Propagation, vol. 2015, 2015.

J. C. Rao and N. V. Rao, “Cpw-fed compact ultra wideband mimo antenna for portable devices,” Indian Journal of Science and Technology, vol. 9, no. 17, pp. 1–9, 2016.

M. A. Abdalla and A. A. Ibrahim, “Design of close, compact, and high isolation meta-material mimo antennas,” in Proceedings of the Antennas and Propagation Society International Symposium (APSURSI). IEEE, 2013, pp. 186–187.

Y. Torabi, A. Bahri, and A.-R. Sharifi, “A novel metamaterial MIMO antenna with improved isolation and compact size based on LSRR resonator,” IETE Journal of Research, vol. 62, no. 1, pp. 106–112, 2016.

X. Li, Q. Feng, and Q.-Y. Xiang, “A novel via less resonant type antenna based on composite right/left-handed transmission line (crlh-tl) unit cell with defected ground structure,” Progress In Electromagnetics Research, vol. 38, pp. 55–64, 2013.

P.-W. Chen and F.-C. Chen, “Asymmetric coplanar waveguide (ACPW) zeroth-order resonant (ZOR) antenna with high efficiency and bandwidth enhancement,” IEEE Antennas and Wireless Propagation Letters, vol. 11, pp. 527–530, 2012.

P.-L. Chi and Y.-S. Shih, “Compact and bandwidth-enhanced zeroth-order resonant antenna,” IEEE Antennas and Wireless Propagation Letters, vol. 14, pp. 285–288, 2015.

K. Sheeja, P. Sahu, and S. Behera, “Comparative study of a CRLH TL based Zeroth Order Resonant antenna,” in Proceedings of the National Conference on Communications (NCC). IEEE, 2012, pp. 1–5.

M. Tauseef Asim and M. Ahmed, “Metamaterial inspired microstrip antenna investigations using metascreens,” International Journal of Antennas and Propagation, vol. 2015, 2015.

ETSI TS 136 101 V10.3.0 (2011-06), “Lte, user equipment (ue) radio transmission and reception,” 2011.

A. Lai, K. M. Leong, and T. Itoh, “Infinite wavelength resonant antennas with monopolar radiation pattern based on periodic structures,” IEEE Transactions on Antennas and Propagation, vol. 55, no. 3, pp. 868–876, 2007.

M. P. Karaboikis, V. C. Papamichael, G. F. Tsachtsiris, C. F. Soras, and V. T. Makios, “Integrating compact printed antennas onto small diversity/MIMO terminals,” IEEE Transactions on Antennas and Propagation, vol. 56, no. 7, pp. 2067–2078, 2008.

3GPP TS 36.101, V8.3.0., “EUTRA User Equipment Radio Transmission and Reception,” Sep. 2008.

Full Text: PDF

Giấp phép số 69/GP-TTĐT cấp ngày 26/12/2014.
Tổng biên tập: Vũ Chí Kiên
Tòa soạn: 110-112, Bà Triệu, Hà Nội; Điện thoại: 04. 37737136; Fax: 04. 37737130; Email:
Ghi rõ nguồn “Tạp chí Công nghệ thông tin và truyền thông” khi phát hành lại thông tin từ website này