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Alibakhshikenari, Mohammad, Parand, Peiman, Virdee, Bal Singh, Zuazola, Ignacio Garcia, Kumar, Sunil, Zidour, Ali, Soruri, Mohammad, saber, Takfarinas, Naser-Moghadasi, Mohammad and Limiti, Ernesto (2025) Advanced wideband antenna arrays for 5G millimeter-wave spectrum at K- and Ka-bands. In: Wideband wave-propagating components for wireless RF communications. IntechOpen, London (UK), pp. 1-26.
Millimeter-wave (mm-Wave) wireless communication systems play a central role in meeting the demands of next-generation wireless technologies such as 5G. This chapter presents the design and analysis of three advanced antenna arrays optimized for mm-Wave 5G wireless networks operating over K-band (18–27 GHz) and Ka-band (27–40 GHz). These structures feature radiation patches suspended above a common substrate, excited using three methods to achieve optimal performance. The first method utilizes a 50 Ω open-ended microstrip-line balun to slot-line transition for effective energy coupling and excitation. The second method employs a 50Ω-microstrip feed network, ensuring consistent power distribution across array elements. Lastly, metallic-rods passing through the substrate provide direct excitation, facilitating robust mechanical and electrical integration. To address challenges, innovative techniques were implemented. Vertical metallic-vias suppress unwanted surface currents, while the spacing between radiating elements was optimized as multiples of half-wavelength to minimize interference and maximize array performance. Additionally, antenna elements were enclosed with metallic-walls to further enhance isolation and ensure predictable performance. Further strategies such as bowtie-like dipoles were incorporated to provide wider radiation apertures and better impedance matching. Power dividers were used to split input signals into multiple equal-phase outputs, boosting overall gain. Furthermore, the patches were embedded with slots to exhibit metasurface characteristics, enhancing bandwidth and radiation performance while maintaining compactness. The design methodologies and optimizations result in antenna arrays with superior performance metrics. The detailed analysis, innovative techniques, and demonstrated performance of the proposed antenna arrays establish them as strong candidates for practical deployment in advanced 5G mm-Wave networks and beyond.
Available under License Creative Commons Attribution 4.0.
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