1. Rahimi, M., F. B. Zarrabi, R. Ahmadian, Z. Mansouri, and A. Keshtkar, "Miniaturization of antenna for wireless application with difference metamaterial structures," Progress In Electromagnetics Research, Vol. 145, 19-29, 2014.
doi:10.2528/PIER13120902
2. Mishra, N. and R. K. Chaudhary, "A compact CPW fed CRR loaded four element metamaterial array antenna for wireless application," Progress In Electromagnetics Research, Vol. 159, 15-26, 2017.
doi:10.2528/PIER17021304
3. Heydari, S., P. Jahangiri, A. S. Arezoomand, and F. B. Zarrabi, "Circular polarization fractal slot by Jerusalem cross slot for wireless applications," Progress In Electromagnetics Research Letters, Vol. 63, 79-84, 2016.
doi:10.2528/PIERL16070802
4. Mansouri, Z., A. S. Arezoomand, S. Heydari, and F. B. Zarrabi, "Dual notch UWB fork monopole antenna with CRLH metamaterial load," Progress In Electromagnetics Research C, Vol. 65, 111-119, 2016.
doi:10.2528/PIERC16040711
5. Mishra, N., A. Gupta, and R. K. Chaudhary, "A compact CPW-fed wideband metamaterial antenna using Ω-shaped interdigital capacitor for mobile applications," Microw. Opt. Tech. Lett., Vol. 57, No. 11, 2558-2562, 2015.
doi:10.1002/mop.29402
6. Mishra, N. and R. K. Chaudhary, "A miniaturized ZOR antenna with enhanced bandwidth for WiMAX applications," Microw. Opt. Tech. Lett., Vol. 58, No. 1, 71-75, 2016.
doi:10.1002/mop.29494
7. Ziolkwoski, R. W. and A. D. Kipple, "Application of double negative materials to increase the power radiated by electrically small antennas," IEEE Trans. Antennas Propag., Vol. 51, No. 10, 2626-2640, October 2003.
doi:10.1109/TAP.2003.817561
8. Li, D., Z. Szabo, X. Qing, E. P. Li, and Z. N. Chen, "A high gain antenna with an optimized metamaterial inspired superstrate," IEEE Trans. Antennas Propag., Vol. 60, No. 12, 6018-6023, Dec. 2012.
doi:10.1109/TAP.2012.2213231
9. Ju, J., K. Dongho, J. L. Wangjoo, and I. C. Jaeick, "Wideband high-gain antenna using metamaterial superstrate with the zero refractive index," Microw. Opt. Tech. Lett., Vol. 51, No. 8, 1973-1976, Aug. 2009.
doi:10.1002/mop.24469
10. Sarkhel, A. and S. R. B. Chaudhuri, "Enhanced-gain printed slot antenna using an electric metasurface superstrate," Appl. Phys. A, Vol. 122, 934, 2016.
doi:10.1007/s00339-016-0464-2
11. Lee, Y. J., J. Yeo, R. Mittra, and W. S. Park, "Design of a high-directivity electromagnetic band gap (EBG) resonator antenna using a frequency-selective surface (FSS) superstrate," Microw. Opt. Tech. Lett., Vol. 43, 462-467, Dec. 2004.
doi:10.1002/mop.20502
12. Chaimool, S., C. Rakluea, and P. Akkaraekthalin, "Compact wideband microstrip thinned array antenna using EBG supersrate," AEU-International Journal of Electronics and Communication, Vol. 66, No. 1, 49-53, 2012.
doi:10.1016/j.aeue.2011.04.015
13. Mittra, R., Y. Li, and K. Yoo, "A comparative study of directivity enhancement of patch antennas using three different superstrates," Microwave & Optical Lett., Vol. 52, No. 2, 327-331, Feb. 2010.
doi:10.1002/mop.24898
14. Lee, Y. J., W. S. Park, J. Yeo, and R. Mittra, "Directivity enhancement of printed antennas using a class of metamaterial superstrates," Electromagnetics, Vol. 26, No. 3–4, 203-218, 2005.
15. Lovat, G., P. Burghignoli, F. Capolino, D. R. Jackson, and D. R. Wilton, "Analysis of directive radiation from a line source in a metamaterial slab with low permittivity," IEEE Trans. Antennas Propag., Vol. 54, No. 3, 1017-1030, 2006.
doi:10.1109/TAP.2006.869925
16. Lovat, G., P. Burghignoli, F. Capolino, and D. R. Jackson, "Combinations of low/high permittivity and/or permeability substrates for highly directive planar metamaterial antennas," IET Microw. Antennas Propag., Vol. 1, No. 1, 177-183, 2007.
doi:10.1049/iet-map:20050353
17. Mitra, D., A. Sarkhel, O. Kundu, and S. R. B. Chaudhuri, "Design of compact and high directive slot antenna using grounded metamaterial slab," IEEE Antennas and Wireless Propag. Lett., Vol. 14, 811-814, 2015.
doi:10.1109/LAWP.2014.2380772
18. Mitra, D., B. Ghosh, A. Sarkhel, and S. R. B. Chaudhuri, "A miniaturized ring slot antenna design with enhanced radiation characteristics," IEEE Trans. Antennas Propag., Vol. 64, No. 1, 300-305, 2016.
doi:10.1109/TAP.2015.2496628
19. Schurig, D., J. J. Mock, and D. R. Smith, "Electric-field-coupled resonators for negative permittivity metamaterials," Applied Phys. Lett., Vol. 88, No. 4, 041109, 2006.
doi:10.1063/1.2166681
20. Numan, A. B. and M. S. Sharawi, "Extraction of material parameters for metamaterials using a full-wave simulator [education column]," IEEE Antennas and Propagation Magazine, Vol. 55, No. 5, 202-211, 2013.
doi:10.1109/MAP.2013.6735515
21. Wani, Z., M. P. Abegaonkar, and S. K. Koul, "Gain enhancement of millimetre wave antenna with metamaterial loading," International Symposium on Antennas and Propag., Phuket, Thailand, 2017.
22. Yeo, J. and J.-I. Lee, "Broadband flat gain enhancement of planar double dipole quasi-yagi antenna using multiple directors," Progress In Electromagnetics Research C, Vol. 65, 1-9, 2016.
doi:10.2528/PIERC16042105
23. Kesornpatumanun, V., P. Boonek, W. Silabut, N. Homsup, and W. Kuhirun, "High directivity and gain enhancement for small planar dipole antenna at 11 GHz using symmetrical pyramidal block based on epsilon negative medium," International Scholarly and Scientific Research and Innovation, Vol. 8, No. 5, 817-820, 2014.