volume | PIER Journals

Abstract

With the supersonic growth of mobile data demand, the fifth generation (5G) mobile network would exploit the extensive amount of spectrum in the millimeter-wave (mm-Wave) bands to tremendously increase communication capacity. There are conceptual differences between mm-Wave communications and other existing communication systems, in terms of high propagation loss, directivity, and sensitivity to blockage. These characteristics of mm-Wave communications present several challenges to completely exploit the potential of mm-Wave communications, including integrated circuits and system design, interference management, spatial reuse, anti-blockage, and dynamics control. 5G mobile communication systems with sub-6 GHz and millimeter-wave bands are already replacing 4G and 4.5G systems as an evolution towards higher-speed mobile communication and wider bandwidth. From the hardware perspective, the 5G-band causes the miniaturization of RF components including the antennas. In this article, an overview of recent research is presented that discusses design challenges and measurement considerations for various types of compact 5G antennas.

1. Rappaport, T. S., Wireless Communications: Principles and Practice, 2nd Ed., Prentice Hall PTR, New Jersey, 1996.

2. Goldsmith, A., Wireless Communications, Cambridge University Press, 2005.

3. Hillebrand, F., "The creation of standards for global mobile communication: GSM and UMTS standardization from 1982 to 2000," IEEE Wirel. Commun., Vol. 20, No. 4, 24-33, 2013. Google Scholar

4. Saeed, N., A. Bader, T. Y. Al-Naffouri, and M. S. Alouini, "When wireless communication faces COVID-19: Combating the pandemic and saving the economy," Frontiers in Communications and Networks, Vol. 1, No. 2, 2020. Google Scholar

5. Bliss, D. W. and S. Govindasamy, Adaptive Wireless Communications: MIMO Channels and Networks, Cambridge University Press, 2013.

6. Dahlman, E., S. Parkvall, and J. Skold, 4G: LTE/LTE-advanced for Mobile Broadband, Academic Press, 2013.

7. Biglieri, E., R. Calderbank, A. Constantinides, A. Goldsmith, A. Paulraj, and H. V. Poor, MIMO Wireless Communications, Cambridge University Press, 2007.

8. Hampton, J. R., Introduction to MIMO Communications, Cambridge University Press, 2013.

9. Moradikordalivand, A., C. Y. Leow, T. AbdRahman, S. Ebrahimi, and T. H. Chua, "Wideband MIMO antenna system with dual polarization for Wi-Fi and LTE applications," Int. J. Microw. Wireless Technol., Vol. 8, No. 2, 643-650, 2020. Google Scholar

10. Warren, D. and D. Calum, "Understanding 5G: Perspectives on future technological advancements in mobile," GSMA Intelligence Report, 2014. Google Scholar

11., https://www.ericsson.com/en/press-releases/2018/11/5g-estimated-to-reach-1.5-billion-subscriptions-in-2024-ericsson-mobility-report, 2018. Google Scholar

12. Matin, M. A., "Review on millimeter wave antennas-potential candidate for 5G enabled applications," Advanced Electromagnetics, Vol. 5, No. 2, 98-105, 2016. Google Scholar

13. Chih-Lin, I., S. Han, Z. Xu, Q. Sun, and Z. Pan, "5G: Rethink mobile communications for 2020," Philosophical Trans. Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 374, No. 2062, 20140432, 2016. Google Scholar

14., https://www.qualcomm.com/media/documents/files/5g-vision-use-cases.pdf. Google Scholar

15. Gawas, A. U., "An overview on evolution of mobile wireless communication networks: 1G-6G," Int. J. Recent and Innovation Trends in Computing and Communication, Vol. 3, No. 4, 3130-3133, 2015. Google Scholar

16. Anguera, J., A. Andújar, M. C. Huynh, C. Orlenius, C. Picher, and C. Puente, "Advances in antenna technology for wireless handheld devices," Int. J. Antennas Propag.1, 1-25, 2013. Google Scholar

17. Lam, K. Y., K. M. Luk, K. F. Lee, H. Wong, and K. B. Ng, "Small circularly polarized U-slot wideband patch antenna," IEEE Antennas Wirel. Propag. Lett., Vol. 10, 87-90, 2011. Google Scholar

18. Sharawi, M. S., "Printed multi-band MIMO antenna systems and their performance metrics [wireless corner]," IEEE Antennas Propag. Mag., Vol. 55, No. 4, 218-232, 2013. Google Scholar

19. Li, Y., J. Wang, and K. M. Luk, "Millimeter-wave multibeam aperture-coupled magnetoelectric dipole array with planar substrate integrated beamforming network for 5G applications," IEEE Trans. Antennas Propag., Vol. 65, No. 12, 6422-6431, 2017. Google Scholar

20. Yu, B., K. Yang, and G. Yang, "A novel 28 GHz beam steering array for 5G mobile device with metallic casing application," IEEE Trans. Antennas Propag., Vol. 66, No. 1, 462-466, 2017. Google Scholar

21. Boxall, A., , www.digitaltrends.com/mobile/xiaomi-mi-mix-3-news, 2019. Google Scholar

22. Boxall, A., , www.digitaltrends.com/android/samsung-galaxy-s10-5g-news, 2019. Google Scholar

23. Simruni, M. and S. Jam, "Radiation performance improvement of wideband microstrip antenna array using wideband AMC structure," Int. J. Communication Systems, Vol. 32, No. 11, e3962, 2019. Google Scholar

24. Das, S., T. Bose, and H. Islam, "Design, and acceptance test of compact planar monopole antenna for LTE smartphone considering SAR, TRP, and HAC values," Int. J. Communication Systems, Vol. 32, No. 18, e4155, 2019. Google Scholar

25. Kraus, J. D., R. J. Marhefka, and A. S. Khan, Antennas and Wave Propagation, Tata McGraw-Hill Education, 2006.

26. Balanis, C. A., Antenna Theory: Analysis and Design, John Wiley & Sons, 2015.

27. Yu, G., G. Y. Li, L. C. Wang, A. Maaref, J. Lee, and D. Lopez-Perez, "Guest editorial: LTE in unlicensed spectrum," IEEE Wirel. Commun., Vol. 23, No. 5, 6-7, 2016. Google Scholar

28., https://gsacom.com/5G-spectrum-bands, 2017. Google Scholar

29., https://www.fcc.gov/document/fcc-adopts-rules-facilitate-next-generation-wireless-technologies, 2016. Google Scholar

30., https://rspg-spectrum.eu/wp-content/uploads/2013/05/RPSG16-032-Opinion 5G.pdf, 2016. Google Scholar

31. Marcus, M. J., "5G and IMT for 2020 and beyond. [Spectrum Policy and Regulatory Issues]," IEEE Wirel. Commun., Vol. 22, No. 3, 2-3, 2015. Google Scholar

32., https://www.qualcomm.com/news/onq/2017/10/04/path-opening-more-spectrum-5g-us, 2017. Google Scholar

33. Joint Task Group. ITUR, Annex 3 to Joint Task Group 4-5-6-7 Chairman's Report --- Working document towards preliminary draft CPM text for WRC-15 agenda item 1.1. Tech. Rep. Doc. 2013; 4-5-6-7/393-E. Google Scholar

34. Resolution ITUR. 233, Studies on frequency-related matters on international mobile telecommunications and other terrestrial mobile broadband applications. Tech. Rep. 2012; 233 [COM6/8]. Google Scholar

35., https://www.miwv.com/5g-radio-frequency, 2018. Google Scholar

36. MacCartney, G. R., J. Zhang, S. Nie, and T. S. Rappaport, "Path loss models for 5G millimeter wave propagation channels in urban microcells," 2013 IEEE Global Communications Conference (GLOBECOM), 3948-3953, 2013. Google Scholar

37., https://www.cablefree.net/wirelesstechnology/4glte/5g-frequency-bands-lte/. Google Scholar

38. Andrews, J. G., S. Buzzi, W. Choi, S. V. Hanly, A. Lozano, A. C. Soong, and J. C. Zhang, "What will 5G be?," IEEE J. Selected Areas Communications, Vol. 32, No. 5, 1065-1082, 2014. Google Scholar

39. Niu, Y., Y. Li, D. Jin, L. Su, and A. V. Vasilakos, "A survey of millimeter wave communications (mmWave) for 5G: Opportunities and challenges," Wireless Networks, Vol. 21, No. 8, 2657-2676, 2015. Google Scholar

40. Rappaport, T. S., J. N. Murdock, and F. Gutierrez, "State of the art in 60-GHz integrated circuits and systems for wireless communications," Proc. of the IEEE, Vol. 99, No. 8, 1390-1436, 2011. Google Scholar

41. Jameel, F., Z. Hamid, F. Jabeen, S. Zeadally, and M. A. Javed, "A survey of device-to-device communications: Research issues and challenges," IEEE Commun. Surveys & Tutorials, Vol. 20, No. 2, 2133-2168, 2018. Google Scholar

42. Chiaraviglio, L., C. Di Paolo, and N. B. Melazzi, "5G network planning under service and EMF constraints: Formulation and solutions," IEEE Trans. Mobile Computing, 1-18, 2021. Google Scholar

43. Jaber, M., M. A. Imran, R. Tafazolli, and A. Tukmanov, "5G backhaul challenges and emerging research directions: A survey," IEEE Access, Vol. 4, 1743-1766, 2016. Google Scholar

44. Ahmad, I., T. Kumar, M. Liyanage, J. Okwuibe, M. Ylianttila, and A. Gurtov, "Overview of 5G security challenges and solutions," IEEE Commun. Standards Mag., Vol. 2, No. 1, 36-43, 2018. Google Scholar

45., https://www.bench.com/setting-the-benchmark/challenges-when-selecting-the-right-substrate-board-material-to-make-a-5g-mmwave-antenna, 2019. Google Scholar

46., https://rogerscorp.com/-/media/project/rogerscorp/documents/advanced-connectivity-solutions/english/data-sheets/rt-duroid-5870-5880-data-sheet.pdf. Google Scholar

47., https://rogerscorp.com/-/media/project/rogerscorp/documents/advanced-connectivity-solutions/english/data-sheets/ro3000-laminate-data-sheet-ro3003-ro3006-ro3010-ro3035.pdf. Google Scholar

48., https://rogerscorp.com/-/media/project/rogerscorp/documents/advanced-connectivity-solutions/english/data-sheets/ro4000-laminates-ro4003c-and-ro4350b-data-sheet.pdf. Google Scholar

49., https://en.wikipedia.org/wiki/FR-4. Google Scholar

50. Zhang, L., S. Zhao, P. Shang, J. Liu, and F. Han, "Distributed adaptive range extension setting for small cells in heterogeneous cellular network," 2017 IEEE 85th Vehicular Technology Conference (VTC Spring), 1-7, 2017. Google Scholar

51. Mehran, F. and A. Rahimian, "Physical layer performance enhancement for femtocell SISO/MISO soft real-time wireless communication systems employing serial concatenation of quadratic interleaved codes," IEEE 20th Iranian Conference on Electrical Engineering (ICEE2012), 118-1193, 2012. Google Scholar

52. Bouras, C. and G. Diles, "Energy efficiency in sleep mode for 5G femtocells," 2017 IEEE Wireless Days, 143-145, 2017. Google Scholar

53. Wang, C.-J. and C.-H. Lin, "A circularly polarized quasi-loop antenna," Progress In Electromagnetics Research, Vol. 84, 333-348, 2008. Google Scholar

54. Khalily, M., R. Tafazolli, T. A. Rahman, and M. R. Kamarudin, "Design of phased arrays of series-fed patch antennas with reduced number of the controllers for 28-GHz mm-wave applications," IEEE Antennas Wirel. Propag. Lett., Vol. 15, 1305-1308, 2015. Google Scholar

55. Ta, S. X., H. Choo, and I. Park, "Broadband printed-dipole antenna, and its arrays for 5G applications," IEEE Antennas Wirel. Propag. Lett., Vol. 16, 2183-2186, 2017. Google Scholar

56. Dadgarpour, A., M. S. Sorkherizi, and A. A. Kishk, "Wideband low loss magnetoelectric dipole antenna for 5G wireless network with gain enhancement using meta lens and gap waveguide technology feeding," IEEE Trans. Antennas Propag., Vol. 64, No. 12, 5094-5101, 2016. Google Scholar

57. Park, S. J., D. H. Shin, and S. O. Park, "Low side-lobe substrate-integrated-waveguide antenna array using broadband unequal feeding network for millimeter-wave handset device," IEEE Trans. Antennas Propag., Vol. 64, No. 2, 923-932, 2015. Google Scholar

58. Ali, M., K. K. Sharma, R. P. Yadav, A. Kumar, F. Jiang, Q. S. Cheng, and G. L. Huang, "Design of dual mode wideband SIW slot antenna for 5G applications," Int. J. RF Microw. Comput.-Aided Engineering, Vol. 30, No. 12, e22449, 2020. Google Scholar

59. Ullah, H. and F. A. Tahir, "A wide-band rhombus monopole antenna array for millimeter wave applications," Microw. Optical Technol. Lett., Vol. 62, No. 4, 2111-2117, 2020. Google Scholar

60. Yang, W. C., H. Wang, W. Q. Che, Y. Huang, and J. Wang, "High-gain, and low-loss millimeter-wave LTCC antenna array using artificial magnetic conductor structure," IEEE Trans. Antennas Propag., Vol. 63, No. 1, 390-395, 2014. Google Scholar

61. Cheng, Y. and Y. Dong, "A compact folded SIW multibeam antenna array for 5G millimeter wave applications," Microw. Optical Technol. Lett., Vol. 63, No. 3, 1236-1242, 2021. Google Scholar

62. Malathi, A. C. J. and D. Thiripurasundari, "Review on isolation techniques in MIMO antenna systems," Indian Journal of Science and Technology, Vol. 9, No. 35, 1-10, 2016. Google Scholar

63. Sharawi, M. S., "Printed multi-band MIMO antenna systems and their performance metrics [wireless corner]," IEEE Antennas Propag. Mag., Vol. 55, No. 4, 218-232, 2013. Google Scholar

64. Blanch, S., J. Romeu, and I. Corbella, "Exact representation of antenna system diversity performance from input parameter description," Electron. Lett., Vol. 39, No. 9, 705-707, 2003. Google Scholar

65. Hallbjorner, P., "The significance of radiation efficiencies when using S-parameters to calculate the received signal correlation from two antennas," IEEE Antennas Wirel. Propag. Lett., Vol. 4, 97-99, 2005. Google Scholar

66. Rosengren, K. and P. S. Kildal, "Radiation efficiency, correlation, diversity gain and capacity of a six-monopole antenna array for a MIMO system: Theory, simulation, and measurement in reverberation chamber," IEE Proceedings --- Microwaves, Antennas and Propagation, Vol. 152, No. 1, 7-16, 2005. Google Scholar

67. Chae, S. H., S. K. Oh, and S. O. Park, "Analysis of mutual coupling, correlations, and TARC in WiBro MIMO array antenna," IEEE Antennas Wirel. Propag. Lett., Vol. 6, 122-125, 2007. Google Scholar

68. Shin, H. and J. H. Lee, "Capacity of multiple antennas fading channels: Spatial fading correlation, double scattering, and keyhole," IEEE Trans. Information Theory, Vol. 49, No. 10, 2636-2647, 2003. Google Scholar

69. Jilani, S. F. and A. Alomainy, "Millimeter-wave T-shaped MIMO antenna with defected ground structures for 5G cellular networks," IET Microw., Antennas & Propag., Vol. 12, No. 4, 672-677, 2018. Google Scholar

70. Lin, M., P. Liu, and Z. Guo, "Gain-enhanced Ka-band MIMO antennas based on the SIW corrugated technique," IEEE Antennas Wirel. Propag. Lett., Vol. 16, 3084-3087, 2017. Google Scholar

71. Khalid, M., S. IffatNaqvi, N. Hussain, M. Rahman, S. S. Mirjavadi, M. J. Khan, and Y. Amin, "4-port MIMO antenna with defected ground structure for 5G millimeter wave applications," Electronics, Vol. 9, No. 1, 71, 2020. Google Scholar

72. Zhang, Y., J. Y. Deng, M. J. Li, D. Sun, and L. X. Guo, "A MIMO dielectric resonator antenna with improved isolation for 5G mm-wave applications," IEEE Antennas Wirel. Propag. Lett., Vol. 18, No. 3, 747-751, 2019. Google Scholar

73. Sharma, S., B. K. Kanaujia, and M. K. Khandelwal, "Implementation of four-port MIMO diversity microstrip antenna with suppressed mutual coupling and cross-polarized radiations," Microsystem Technologies, Vol. 26, No. 2, 993-1000, 2020. Google Scholar

74. Ikram, M., M. S. Sharawi, K. Klionovski, and A. Shamim, "A switched-beam millimeter-wave array with MIMO configuration for 5G applications," Microw. Optical Technol. Lett., Vol. 60, No. 3, 915-920, 2018. Google Scholar

75. Wani, Z., M. P. Abegaonkar, and S. K. Koul, "A 28-GHz antenna for 5G MIMO applications," Progress In Electromagnetics Research Letters, Vol. 78, 73-79, 2018. Google Scholar

76. Gupta, S., Z. Briqech, A. R. Sebak, and T. A. Denidni, "Mutual-coupling reduction using metasurface corrugations for 28 GHz MIMO applications," IEEE Antennas Wirel. Propag. Lett., Vol. 16, 2763-2766, 2017. Google Scholar

77. Usman, M., E. Kobal, J. Nasir, Y. Zhu, C. Yu, and A. Zhu, "Compact SIW fed dual-port single element annular slot MIMO antenna for 5G mmWave applications," IEEE Access, Vol. 9, 91995-92002, 2021. Google Scholar

78. Kumar, A., A. Q. Ansari, B. K. Kanaujia, J. Kishor, and L. Matekovits, "A review on different techniques of mutual coupling reduction between elements of any MIMO antenna. Part 1: DGSs and parasitic structures," Radio Science, Vol. 56, No. 2, e2020RS007122, 2021. Google Scholar

79. Nadeem, I. and D.-Y. Choi, "Study on mutual coupling reduction techniques for MIMO antennas," IEEE Access, Vol. 7, 563-586, 2018. Google Scholar

80. Han, T. Y., "Broadband circularly polarized square-slot antenna," Journal of Electromagnetic Waves and Applications, Vol. 22, No. 3, 549-554, 2008. Google Scholar

81. Hussain, N., M. J. Jeong, J. Park, and N. Kim, "A broadband circularly polarized fabry-perot resonant antenna using a single-layered PRS for 5G MIMO applications," IEEE Access, Vol. 7, 42897-42907, 2019. Google Scholar

82. Chen, H., Y. Shao, Y. Zhang, C. Zhang, and Z. Zhang, "A low-profile broadband circularly polarized mmWave antenna with special-shaped ring slot," IEEE Antennas Wirel. Propag. Lett., Vol. 18, No. 6, 1492-1496, 2019. Google Scholar

83. Kumar, A., A. Kumar, and A. Kumar, "A broadband circularly polarized monopole antenna for millimeter-wave short range 5G wireless communication," Int. J. RF Microw. Comput.-Aided Engineering, Vol. 31, No. 1, e22518, 2021. Google Scholar

84. Jian, R., Y. Chen, and T. Chen, "Compact wideband circularly polarized antenna with symmetric parasitic rectangular patches for Ka-band applications," Int. J. Antennas Propag., 1-8, 2019. Google Scholar

85. Wu, Q., J. Hirokawa, J. Yin, C. Yu, H. Wang, and W. Hong, "Millimeter-wave multibeam end fire dual-circularly polarized antenna array for 5G wireless applications," IEEE Trans. Antennas Propag., Vol. 66, No. 9, 4930-4935, 2018. Google Scholar

86. Park, S. J. and S. O. Park, "LHCP and RHCP substrate integrated waveguide antenna arrays for millimeter-wave applications," IEEE Antennas Wirel. Propag. Lett., Vol. 16, 601-604, 2016. Google Scholar

87. Du, M., J. Xu, X. Ding, J. Cao, J. Deng, and Y. Dong, "A low-profile wideband LTCC integrated circularly polarized helical antenna array for millimeter-wave applications," Radioengineering, Vol. 27, No. 1, 455-462, 2018. Google Scholar

88. Lin, W. and R. W. Ziolkowski, "Compact, omni-directional, circularly polarized mm-Wave antenna for device-to-device (D2D) communications in future 5G cellular systems," 2017 10th Global Symposium on Millimeter-Waves, 115-116, 2017. Google Scholar

89. Qing, X. and Z. N. Chen, "Millimeter-wave broadband circularly polarized stacked microstrip antenna for satellite applications," 2016 IEEE 5th Asia-Pacific Conference on Antennas and Propagation (APCAP), 341-342, 2016. Google Scholar

90. Mantash, M. and T. A. Denidni, "3D FSS polarizer for millimeter-wave antenna applications," Int. J. RF Microw. Comput.-Aided Engineering, Vol. 29, No. 8, e21767, 2019. Google Scholar

91. Hesari, S. S. and J. Bornemann, "Wideband circularly polarized substrate integrated waveguide end fire antenna system with high gain," IEEE Antennas Wirel. Propag. Lett., Vol. 16, 2262-2265, 2017. Google Scholar

92. Yoon, S. J. and J. H. Choi, "A Ka-band circular polarized waveguide slot antenna with a cross iris," Applied Sciences, Vol. 10, No. 19, e6994, 2020. Google Scholar

93. Zhang, K., J. Li, Y. Yang, and R. Xu, "A novel design of circularly polarized waveguide antenna," Proceedings of 2014 3rd IEEE Asia-Pacific Conference on Antennas and Propagation, 130-133, 2014. Google Scholar

94. Kesavan, A., M. A. Al-Hassan, I. Ben Mabrouk, and T. A. Denidni, "Wideband circular polarized dielectric resonator antenna array for millimeter-wave applications," Sensors, Vol. 21, No. 11, e3614, 2021. Google Scholar

95. Askari, H., N. Hussain, M. A. Sufian, S. M. Lee, and N. Kim, "A wideband circularly polarized magnetoelectric dipole antenna for 5G millimeter-wave communications," Sensors, Vol. 22, 2338, 2022. Google Scholar

96. Zhu, C., G. Xu, D. Ding, J. Wu, W. Wang, Z.-X. Hunag, and X.-L. Wu, "Low-profile wideband millimeter-wave circularly polarized antenna with hexagonal parasitic patches," IEEE Antennas Wirel. Propag. Lett., Vol. 20, No. 9, 1651-1655, 2021. Google Scholar

97. Khalid, M., S. IffatNaqvi, N. Hussain, M. Rahman, S. S. Mirjavadi, M. J. Khan, and Y. Amin, "4-port MIMO antenna with defected ground structure for 5G millimeter wave applications," Electronics, Vol. 9, No. 1, 71, 2020. Google Scholar

98. Christodoulou, C. G., Y. Tawk, S. A. Lane, and S. R. Erwin, "Reconfigurable antennas for wireless and space applications," Proceedings of the IEEE, Vol. 100, No. 6, 2250-2261, 2012. Google Scholar

99. Friis, H. T., C. B. Feldman, and W. M. Sharpless, "The determination of the direction of arrival of short radio waves," Proceedings of the Institute of Radio Engineers, Vol. 22, No. 1, 47-78, 1934. Google Scholar

100. Al Abbas, E., A. T. Mobashsher, and A. Abbosh, "Polarization reconfigurable antenna for 5G cellular networks operating at millimeter waves," 2017 IEEE Asia Pacific Microwave Conference (APMC), 772-774, 2017. Google Scholar

101. Brown, E. R., "RF-MEMS switches for reconfigurable integrated circuits," IEEE Trans. Microw. Theory and Techniques, Vol. 46, No. 11, 1868-1880, 1998. Google Scholar

102. Deng, Z., J. Gan, H. Wei, H. Gong, and X. Guo, "Ka-band radiation pattern reconfigurable antenna based on microstrip MEMS switches," Progress In Electromagnetics Research Letters, Vol. 59, 93-99, 2016. Google Scholar

103. Ikram, M., E. Al Abbas, N. Nguyen-Trong, K. H. Sayidmarie, and A. Abbosh, "Integrated frequency-reconfigurable slot antenna and connected slot antenna array for 4G and 5G mobile handsets," IEEE Trans. Antennas Propag., Vol. 67, No. 12, 7225-7233, 2019. Google Scholar

104. Anagnostou, D. E., G. Zheng, M. T. Chryssomallis, J. C. Lyke, G. E. Ponchak, J. Papapolymerou, and C. G. Christodoulou, "Design, fabrication, and measurements of an RF-MEMS-based self- similar reconfigurable antenna," IEEE Trans. Antennas Propag., Vol. 54, No. 1, 422-432, 2006. Google Scholar

105. Dufour, G., N. Tiercelin, W. T. Khan, P. Coquet, P. Pernod, and J. Papapolymerou, "Large frequency tuning of a millimeter-wave antenna using dielectric liquids in integrated micro-channels," 2015 IEEE MTT-S International Microwave Symposium, 1-4, 2015. Google Scholar

106. Jilani, S. F., S. M. Abbas, K. P. Esselle, and A. Alomainy, "Millimeter-wave frequency reconfigurable T-shaped antenna for 5G networks," 2015 IEEE 11th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), 100-102, 2015. Google Scholar

107. Hassan, A. E. H., N. Fadlallah, M. Rammal, G. Z. El Nashef, and E. Rachid, "Wideband reconfigurable millimeter-wave linear array antenna using liquid crystal for 5G networks," Wireless Engineering and Technology, Vol. 12, No. 1, 1-14, 2021. Google Scholar

108. Al Abbas, E., N. Nguyen-Trong, A. T. Mobashsher, and A. M. Abbosh, "Polarization-reconfigurable antenna array for millimeter-wave 5G," IEEE Access, Vol. 7, 131214-131220, 2019. Google Scholar

109. Haupt, R. L. and M. Lanagan, "Reconfigurable antennas," IEEE Antennas Propag. Magazine, Vol. 55, No. 1, 49-61, 2013. Google Scholar

110. Lai, M. I., T. Y. Wu, J. C. Hsieh, C. H. Wang, and S. K. Jeng, "Design of reconfigurable antennas based on an L-shaped slot and PIN diodes for compact wireless devices," IET Microwaves, Antennas & Propagation, Vol. 3, No. 1, 47-54, 2009. Google Scholar

111. Weedon, W. H., W. J. Payne, and G. M. Rebeiz, "MEMS-switched reconfigurable antennas," IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio S, Vol. 3, 654-657, 2001. Google Scholar

112. Petosa, A., "An overview of tuning techniques for frequency-agile antennas," IEEE Antennas Propag. Magazine, Vol. 54, No. 4, 271-296, 2012. Google Scholar

113. Entesari, K. and A. P. Saghati, "Fluidics in microwave components," IEEE Microwave Magazine, Vol. 17, No. 5, 50-75, 2016. Google Scholar

114. Raymond, L., L. Nelson, D. Hamilton, and W. Kerwin, "Fabrication of passive components for high temperature instrumentation," IEEE Trans. Components, Hybrids, and Manufacturing Technology, Vol. 2, No. 3, 395-398, 1979. Google Scholar

115. Lakafosis, V., A. Rida, R. Vyas, L. Yang, S. Nikolaou, and M. M. Tentzeris, "Progress towards the first wireless sensor networks consisting of inkjet-printed, paper-based RFID-enabled sensor tags," Proceedings of the IEEE, Vol. 98, No. 9, 1601-1609, 2010. Google Scholar

116. Orecchini, G., F. Alimenti, V. Palazzari, A. Rida, M. M. Tentzeris, and L. Roselli, "Design and fabrication of ultra-low-cost radio frequency identification antennas and tags exploiting paper substrates and inkjet printing technology," IET Microwaves, Antennas & Propagation, Vol. 5, No. 8, 993-1001, 2011. Google Scholar

117. Gamota, D. R., P. Brazis, K. Kalyanasundaram, and J. Zhang, Printed Organic and Molecular Electronics, Springer Science & Business Media, 2013.

118., https://www.lpkf.com/en/industries-technologies/research-in-house-pcb-prototyping/produkte/-lpkf-protolaser-u4, 2017. Google Scholar

119. Jilani, S. F., A. Rahimian, Y. Alfadhl, and A. Alomainy, "Low-profile flexible frequency-reconfigurable millimeter-wave antenna for 5G applications," Flexible and Printed Electronics, Vol. 3, No. 2, 035003, 2018. Google Scholar

120. Tehrani, B., B. Cook, J. Cooper, and M. Tentzeris, "Inkjet printing of a wideband, high gain mm-wave Vivaldi antenna on a flexible organic substrate," 2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 320-321, 2014. Google Scholar

121. Balanis, C. A., Antenna Theory: Analysis and Design, John Wiley & Sons, 2015.

122. Shamim, A., L. Roy, N. Fong, and N. G. Tarr, "24 GHz on-chip antennas and balun on bulk Si for air transmission," IEEE Trans. Antennas Propag., Vol. 56, No. 1, 303-311, 2008. Google Scholar

123., https://antennatestlab.com/antenna-education-tutorials/gain-dbi-passive-antenna. Google Scholar

124. Liu, C. C. and R. G. Rojas, "V-band integrated on-chip antenna implemented with a partially reflective surface in standard 0.13-μm BiCMOS technology," IEEE Trans. Antennas Propag., Vol. 64, No. 12, 5102-5109, 2016. Google Scholar

125. Jing, L., C. R. Rowell, S. Raju, M. Chan, R. D. Murch, and C. P. Yue, "Fabrication and measurement of millimeter-wave on-chip MIMO antenna for CMOS RFIC's," 2016 IEEE MTT-S International Wireless Symposium (IWS), 1-4, 2016. Google Scholar

126., https://api.ctia.org/wpcontent/uploads/2019/04/CTIAOTATest Plan 3 8 2.pdf, 2019. Google Scholar

127. Qi, Y., G. Yang, L. Liu, J. Fan, A. Orlandi, H. Kong, W. Yu, and Z. Yang, "5G over-the-air measurement challenges: Overview," IEEE Trans. Electromagnetic Compatibility, Vol. 59, No. 5, 1661-1670, 2017. Google Scholar

128. Li, J., Y. Qi, W. Yu, F. Li, J. Fan, A. Orlandi, Z. Yang, and S. Wu, "Objective MIMO measurement," IEEE Trans. Electromagnetic Compatibility, Vol. 60, No. 4, 1190-1197, 2018. Google Scholar

129. Yu, W., Y. Qi, K. Liu, Y. Xu, and J. Fan, "Radiated two-stage method for LTE MIMO user equipment performance evaluation," IEEE Trans. Electromagnetic Compatibility, Vol. 56, No. 5, 1691-1696, 2014. Google Scholar

130. Shen, P., Y. Qi, W. Yu, and F. Li, "Inverse matrix autosearch technique for the RTS MIMO OTA test," IEEE Trans. Electromagnetic Compatibility, Vol. 63, No. 3, 962-969, 2021. Google Scholar

Dr. Ashok Kumar

Dr. Ashok Kumar

Prof. Ping Jack Soh

Dr. Arjun Kumar