1. Rowe, W. S. T. and R. B. Waterhouse, "Reduction of backward radiation for CPW fed aperture stacked patch antennas on small ground planes," IEEE Transactions on Antennas and Propagation, Vol. 51, No. 6, June 2003.
2. Kurra, L., M. P. Abegaonkar, A. Basu, and S. K. Koul, "FSS properties of a uni-planar EBG and its application in directivity enhancement of a microstrip antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 15, 1606-1609, 2016.
doi:10.1109/LAWP.2016.2518299
3. Wang, W. and Y. Zheng, "Wideband gain enhancement of high-isolation Fabry-Pérot antenna array with tandem circular parasitic patches and radial gradient PRS," IEEE Transactions on Antennas and Propagation, Vol. 69, No. 11, 7959-7964, 2021.
doi:10.1109/TAP.2021.3083781
4. Javor, R. D., X.-D. Wu, and K. Chang, "Design and performance of a microstrip reflectarray antenna," IEEE Transactions on Antennas and Propagation, Vol. 43, No. 9, September 1995.
doi:10.1109/8.410208
5. Liu, Y., N. Li, Y. Jia, W. Zhang, and Z. Zhou, "Low RCS and high-gain patch antenna based on a holographic metasurface," IEEE Antennas and Wireless Propagation Letters, Vol. 18, No. 3, 492-496, 2019.
doi:10.1109/LAWP.2019.2895117
6. Yang, S., Z. Yan, T. Zhang, M. Cai, F. Fan, and X. Li, "Multifunctional tri-band dual-polarized antenna combining transmitarray and reflectarray," IEEE Transactions on Antennas and Propagation, Vol. 69, No. 9, 6016-6021, 2021.
doi:10.1109/TAP.2021.3060938
7. Prakash, P., M. P. Abegaonkar, A. Basu, and S. K. Koul, "Gain enhancement of a CPW-fed monopole antenna using polarization-insensitive AMC structure," IEEE AntennasandWireless Propagation Letters, Vol. 12, 1315-1318, 2013.
doi:10.1109/LAWP.2013.2285121
8. Liu, Z., P. Wang, and Z. Zeng, "Enhancement of the gain for microstrip antennas using negative permeability metamaterial on Low-Temperature Co-Fired Ceramic (LTCC) substrate," IEEE Antennas and Wireless Propagation Letters, Vol. 12, 429-432, 2013.
doi:10.1109/LAWP.2013.2254697
9. Zhou, B. and T. J. Cui, "Directivity enhancement to Vivaldi antennas using compactly anisotropic zero-index metamaterials," IEEE Antennas and Wireless Propagation Letters, Vol. 10, 326-329, 2011.
doi:10.1109/LAWP.2011.2142170
10. Sun, M., Z. N. Chen, and X. Qing, "Gain enhancement of 60-GHz antipodal tapered slot antenna using zero-index metamaterial," IEEE Transactions on Antennas and Propagation, Vol. 61, No. 4, 1741-1746, April 2013.
doi:10.1109/TAP.2012.2237154
11. Denidni, T. A., Y. Coulibaly, and H. Boutayeb, "Hybrid dielectric resonator antenna with circular mushroom-like structure for gain improvement," IEEE Transactions on Antennas and Propagation, Vol. 57, No. 4, 1043-1049, April 2009.
doi:10.1109/TAP.2009.2015809
12. Zhai, G., X. Wang, R. Xie, J. Shi, J. Gao, B. Shi, and J. Ding, "Gain-enhanced planar log-periodic dipole array antenna using nonresonant metamaterial," IEEE Transactions on Antennas and Propagation, Vol. 67, No. 9, 6193-6198, 2019.
doi:10.1109/TAP.2019.2924111
13. Vaidya, A. R., R. K. Gupta, S. K. Mishra, and J. Mukherjee, "Right-hand/left-hand circularly polarized high-gain antennas using partially reflective surfaces," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 431-434, 2014.
doi:10.1109/LAWP.2014.2308926
14. Xiong, J., Y. Hu, S. Mao, W. Zhang, S. Xiao, and B.-Z. Wang, "Agile beamwidth control and directivity enhancement for aperture radiation with low-profile metasurfaces," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 3, 1528-1533, March 2018.
doi:10.1109/TAP.2017.2784455
15. Zada, M., I. A. Shah, and H. Yoo, "Metamaterial-loaded compact high-gain dual-band circularly polarized implantable antenna system for multiple biomedical applications," IEEE Transactions on Antennas and Propagation, Vol. 68, No. 2, 1140-1144, 2019.
doi:10.1109/TAP.2019.2938573
16. Kurvinen, J., H. Kähköne, A. Lehtovuori, J. Ala-Laurinaho, and V. Viikari, "Co-designed mm-wave and LTE handset antennas," IEEE Transactions on Antennas and Propagation, Vol. 67, No. 3, 1545-1553, 2019.
doi:10.1109/TAP.2018.2888823
17. Rodriguez-Cano, R., S. Zhang, K. Zhao, and G. F. Pedersen, "Reduction of main beam-blockage in an integrated 5G array with a metal-frame antenna," IEEE Transactions on Antennas and Propagation, Vol. 67, No. 5, 3161-3170, May 2019.
doi:10.1109/TAP.2019.2900407
18. Rodriguez-Cano, R., S. Zhang, K. Zhao, and G. F. Pedersen, "Mm-wave beam-steerable endfire array embedded in slotted metal-frame LTE antenna," IEEE Transactions on Antennas and Propagation, Vol. 68, No. 5, 3685-3694, 2020.
doi:10.1109/TAP.2020.2963915
19. Cheng, Y. J. and Y. Fan, "Millimeter-wave miniaturized substrate integrated multibeam antenna," IEEE Transactions on Antennas and Propagation, Vol. 59, No. 12, 4840-4844, December 2011.
doi:10.1109/TAP.2011.2165497
20. Di Paola, C., K. Zhao, S. Zhang, and G. F. Pedersen, "SIW multibeam antenna array at 30 GHz for 5G mobile devices," IEEE Access, Vol. 7, 73157-73164, 2019.
doi:10.1109/ACCESS.2019.2919579