1. Shereen, M. K., M. I. Khattak, and J. Nebhen, "A review of achieving frequency reconfiguration through switching in microstrip patch antennas for future 5G applications," Alexandria Engineering Journal, Vol. 61, No. 1, 29-40, 2022.
doi:10.1016/j.aej.2021.04.105        Google Scholar

2. Kim, G. and K. Sangkil, "Design and analysis of dual polarized broadband microstrip patch antenna for 5G mm wave antenna module on FR4 substrate," IEEE Access, Vol. 9, 64306-64316, 2021.
doi:10.1109/ACCESS.2021.3075495        Google Scholar

3. Kumar, G. and K. P. Ray, Broadband Microstrip Antennas, Artech House, 2003.

4. Haykin, S., "Cognitive radio: Brain-empowered wireless communications," IEEE Journal on Selected Areas in Communications, Vol. 23, No. 2, 201-220, 2005.
doi:10.1109/JSAC.2004.839380        Google Scholar

5. Tawk, Y., J. Costantine, and C. Christodoulou, Antenna Design for Cognitive Radio, Artech House Boston, 2016.

6. De Flaviis, F., L. Jofre, J. Romeu, and A. Grau, "Multiantenna systems for MIMO communications," Synthesis Lectures on Antennas, Vol. 3, No. 1, 1-250, 2008.
doi:10.1007/978-3-031-01536-6        Google Scholar

7. Varzakas, P., "Estimation of radio capacity of a spread spectrum cognitive radio rayleigh fading system," ACM Proceedings of the 17th Pan-Hellenic Conference on Informatics with International Participation, 63-66, 2013.        Google Scholar

8. Bakulin, M. G., V. B. Kreindelin, and D. Y. Pankratov, "Analysis of the capacity of MIMO channel in fading conditions," 2018 Systems of Signal Synchronization, Generating and Processing in Telecommunications (SYNCHROINFO), 1-6, 2018.        Google Scholar

9. Chitra, M. P., S. Divya, M. Premkumar, V. Tamilselvi, and N. Karthika, "MIMO cognitive radio capacity in flat fading channel," 2017 Third International Conference on Science Technology Engineering & Management (ICONSTEM), 915-919, 2017.
doi:10.1109/ICONSTEM.2017.8261335        Google Scholar

10. Cheng, B. and Z. Du, "Dual polarization MIMO antenna for 5G mobile phone applications," IEEE Transactions on Antennas and Propagation, Vol. 69, No. 7, 4160-4165, 2020.
doi:10.1109/TAP.2020.3044649        Google Scholar

11. Chen, Y. S. and C. P. Chang, "Design of a four-element multiple-input-multiple-output antenna for compact long-term evolution small-cell base stations," IET Microwaves, Antennas & Propagation, Vol. 10, No. 4, 385-392, 2016.
doi:10.1049/iet-map.2015.0540        Google Scholar

12. Chen, W. S. and K. H. Lai, "Compact design of MIMO antennas for LTE 700 application," 2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 1148-1149, 2015.
doi:10.1109/APS.2015.7304962        Google Scholar

13. Singh, H. S., G. K. Pandey, P. K. Bharti, and M. K. Meshram, "Compact printed diversity antenna for LTE700/GSM1700/1800/UMTS/Wi-Fi/Bluetooth/LTE2300/2500 applications for slim mobile handsets," Progress In Electromagnetics Research C, Vol. 56, 83-91, 2015.
doi:10.2528/PIERC14122601        Google Scholar

14. Naser, A. A., K. Sayidmarie, and J. S. Aziz, "Compact high isolation meandered-line PIFA antenna for LTE (band-class-13) handset applications," Progress In Electromagnetics Research C, Vol. 67, 153-164, 2016.
doi:10.2528/PIERC16062006        Google Scholar

15. Jan, M. A., D. N. Aloi, and M. S. Sharawi, "A 2 x 1 compact dual band MIMO antenna system for wireless handheld terminals," 2012 IEEE Radio and Wireless Symposium, 23-26, 2012.
doi:10.1109/RWS.2012.6175292        Google Scholar

16. Ikram, M., R. Hussain, A. Ghalib, and M. S. Sharawi, "Compact 4-element MIMO antenna with isolation enhancement for 4G LTE terminals," 2016 IEEE International Symposium on Antennas and Propagation (APSURSI), 535-536, 2016.
doi:10.1109/APS.2016.7695976        Google Scholar

17. Ikram, M. and M. S. Sharawi, "Compact 10-element monopole based MIMO antenna system for 4G mobile phones," 2016 16th Mediterranean Microwave Symposium (MMS), 1-2, 2016.        Google Scholar

18. Shoaib, S., I. Shoaib, N. Shoaib, X. Chen, and C. Parini, "Compact and printed MIMO antennas for 2G/3G and 4G-LTE mobile tablets," 2015 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC), 674-677, 2015.
doi:10.1109/APWC.2015.7300174        Google Scholar

19. Li, S., L. Da Xu, and S. Zhao, "The internet of things: A survey," Information Systems Frontiers, 243-259, 2015.
doi:10.1007/s10796-014-9492-7        Google Scholar

20. Zaman, M. R., R. Azim, N. Misran, M. F. Asillam, and T. Islam, "Development of a semielliptical partial ground plane antenna for RFID and GSM-900," International Journal of Antennas and Propagation, 2014.        Google Scholar

21. Bukhari, B., C. Singh, K. R. Jha, and S. K. Sharma, "Planar MIMO antennas for IoT and CR applications," 2017 IEEE Applied Electromagnetics Conference (AEMC), 1-2, 2017.        Google Scholar

22. Bashir, U., K. R. Jha, G. Mishra, G. Singh, and S. K. Sharma, "Octahedron-shaped linearly polarized antenna for multistandard services including RFID and IoT," IEEE Transactions on Antennas and Propagation, Vol. 65, No. 7, 3364-3373, 2017.
doi:10.1109/TAP.2017.2705097        Google Scholar

23. Ebrahimi, E. and P. S. Hall, "A dual port wide-narrowband antenna for cognitive radio," 2009 3rd European Conference on Antennas and Propagation, 809-812, 2009.        Google Scholar

24. Al-Husseini, M., Y. Tawk, C. G. Christodoulou, K. Y. Kabalan, and A. El Hajj, "A reconfigurable cognitive radio antenna design," 2010 IEEE Antennas and Propagation Society International Symposium, 1-4, 2010.        Google Scholar

25. Tawk, Y., J. Costantine, K. Avery, and C. G. Christodoulou, "Implementation of a cognitive radio front-end using rotatable controlled reconfigurable antennas," IEEE Transactions on Antennas and Propagation, Vol. 59, No. 5, 1773-1778, 2011.
doi:10.1109/TAP.2011.2122239        Google Scholar

26. Mansoul, A., F. Ghanem, M. R. Hamid, and M. Trabelsi, "A selective frequency-reconfigurable antenna for cognitive radio applications," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 515-518, 2014.
doi:10.1109/LAWP.2014.2311114        Google Scholar

27. Cao, Y., S. W. Cheung, X. L. Sun, and T. I. Yuk, "Frequency-reconfigurable monopole antenna with wide tuning range for cognitive radio," Microwave and Optical Technology Letters, Vol. 56, No. 1, 145-152, 2014.
doi:10.1002/mop.28070        Google Scholar

28. Zheng, S. H., X. Y. Liu, and M. M. Tentzeris, "A novel optically controlled reconfigurable antenna for cognitive radio systems," 2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 1246-1247, 2014.
doi:10.1109/APS.2014.6904950        Google Scholar

29. Erfani, E., J. Nourinia, C. Ghobadi, M. Niroo-Jazi, and T. A. Denidni, "Design and implementation of an integrated UWB/reconfigurable-slot antenna for cognitive radio applications," IEEE Antennas and Wireless Propagation Letters, Vol. 11, 77-80, 2012.
doi:10.1109/LAWP.2011.2182631        Google Scholar

30. Srivastava, G., A. Mohan, and A. Chakrabarty, "Compact reconfigurable UWB slot antenna for cognitive radio applications," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 1139-1142, 2016.        Google Scholar

31. Nachouane, H., A. Najid, A. Tribak, and F. Riouch, "Dual port antenna combining sensing and communication tasks for cognitive radio," International Journal of Electronics and Telecommunications, Vol. 62, No. 2, 121-127, 2016.
doi:10.1515/eletel-2016-0016        Google Scholar

32. Hu, Z. H., P. S. Hall, and P. Gardner, "Reconfigurable dipole-chassis antennas for small terminal MIMO applications," Electronics Letters, Vol. 47, No. 17, 953-955, 2011.
doi:10.1049/el.2011.1801        Google Scholar

33. Chacko, B. P., G. Augustin, and T. A. Denidni, "Electronically reconfigurable uniplanar antenna with polarization diversity for cognitive radio applications," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 213-216, 2015.
doi:10.1109/LAWP.2014.2360353        Google Scholar

34. Cheng, S. P. and K. H. Lin, "A reconfigurable monopole MIMO antenna with wideband sensing capability for cognitive radio using varactor diodes," 2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2233-2234, 2015.
doi:10.1109/APS.2015.7305505        Google Scholar

35. Tawk, Y., F. Ayoub, C. G. Christodoulou, and J. Costantine, "A MIMO cognitive radio antenna system," 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), 572-573, 2013.
doi:10.1109/APS.2013.6710946        Google Scholar

36. Hussain, R. and M. S. Sharawi, "Integrated reconfigurable multiple-input-multiple-output antenna system with an ultra-wideband sensing antenna for cognitive radio platforms," IET Microwaves, Antennas & Propagation, Vol. 9, No. 9, 940-947, 2015.
doi:10.1049/iet-map.2014.0605        Google Scholar

37. Truncated Cube --- From Wolfram MathWorld 2017, http://mathworld.wolfram.com/TruncatedTe-trahedron.html, Accessed Dec. 11, 2021.

38. Jha, K. R. and S. K. Sharma, "Combination of frequency agile and quasi-elliptical planar monopole antennas in MIMO implementations for handheld devices," IEEE Antennas Propagation Mag., Vol. 60, 118-131, 2018.
doi:10.1109/MAP.2017.2774198        Google Scholar

39. Fakharian, M. M., P. Rezaei, and A. A. Orouji, "A novel slot antenna with reconfigurable meander- slot DGS for cognitive radio applications," Applied Computational Electromagnetics Society Journal (ACES), Vol. 30, No. 7, 748-753, 2015.        Google Scholar

40. Hussain, R. and M. S. Sharawi, "Planar four-element frequency agile MIMO antenna system with chassis mode reconfigurability," Microwave and Optical Technology Letters, Vol. 57, No. 8, 1933-1938, 2015.
doi:10.1002/mop.29218        Google Scholar