Article
Chemistry, Analytical
Rong Yang, Shuqi Xi, Qibo Cai, Zhizhou Chen, Xiaohang Wang, Gui Liu
Summary: The proposed compact dual-band MIMO antenna, with high isolation and small size, is suitable for 5G and 4G applications.
Article
Computer Science, Information Systems
Yi-Fan Tsao, Arpan Desai, Heng-Tung Hsu
Summary: In this paper, a 2-port dual-band and dual-polarization MIMO antenna for 5G mobile applications was developed and its performance was experimentally verified. The antenna demonstrated a large impedance bandwidth, high gain, good isolation, and cross-polarization. Furthermore, the important parameters of the antenna were characterized and analyzed in this study.
Article
Engineering, Electrical & Electronic
Wei Hu, Qiaosong Li, Hao Wu, Zhan Chen, Lehu Wen, Wen Jiang, Steven Gao
Summary: This paper presents a novel decoupling method for designing a dual-band closely arranged MIMO antenna pair with high isolation for 5G smartphones. By combining a bent loop and a T-shaped monopole into a compact space, multiple in-phase and out-of-phase modes are excited at two different bands to reduce mutual coupling. The proposed antenna pair achieves high isolation of over 24 dB without additional decoupling structures. An 8 x 8 MIMO system is developed using four such antenna pairs, operating at 3.3-3.6 GHz and 4.4-5.0 GHz, with isolation exceeding 12.8 dB, low envelope correlation coefficients (ECCs) below 0.18, and efficiencies above 71% and 68% in the respective bands. This MIMO system features dual-band operation, compact structure, and excellent isolation, providing a promising solution for 5G smartphone antenna design.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Computer Science, Information Systems
Ming Xu, Jingwei Zhang
Summary: This paper presents a circularly polarized multiple-input multiple-output dielectric resonator antenna for 5G millimeter-wave applications. The antenna achieves wideband impedance and optimized axial ratio performance through the use of modified cross slots and complementary split ring resonators.
Article
Engineering, Electrical & Electronic
Aidi Ren, Haoran Yu, Lixia Yang, Zhixiang Huang, Zhanhao Zhang, Ying Liu
Summary: This letter presents an eight-element broadband MIMO antenna array for 5G smartphones, which operates in the 3.3-6 GHz frequency range. This antenna array features double coupled-fed loop modes and a slot mode, excited by a feeding strip connecting with the tuning branch. The antenna design does not require any lumped elements, and it also utilizes polarization diversity technique for improved isolation. The MIMO system achieves good performance in terms of isolation, efficiency, and envelope correlation coefficients, making it suitable for mobile communication of 5G smartphones.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Computer Science, Information Systems
Jianlin Huang, Guiting Dong, Jing Cai, Han Li, Gui Liu
Summary: This paper presents a quad-port antenna array for 5G smartphone applications, operating in both the 3.5 GHz and 5 GHz bands. The antenna elements are composed of various shapes to achieve compact design and good performance.
Article
Chemistry, Analytical
Yuehui Gao, Junlin Wang, Xin Wang, Rui Shao
Summary: This paper proposes a highly isolated multiple-input multiple-output (MIMO) antenna array for fifth-generation (5G) metal frame smartphones. The antenna, consisting of eight identical small-sized inverted F-shaped folded slots etched on the metal frame, allows for adjustable bandwidth by modifying one short branch. Moreover, the positions of the antenna elements are carefully arranged to achieve ideal spatial diversity and effectively reduce coupling. The MIMO antenna system also includes small combination slots to improve element isolation. Simulation, fabrication, and measurement results demonstrate good impedance matching, high isolation, and reliable anti-interference performance. The radiation efficiencies of the MIMO antenna system exceed 50%.
Article
Computer Science, Interdisciplinary Applications
Yongle Wu, Wen Wang, Weimin Wang, Juqing Ran
Summary: This article proposes a novel tri-band MIMO antenna with high-isolation, which achieves coverage of the entire 5G bands and has good isolation characteristics through special design and structural optimization.
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING
(2022)
Article
Computer Science, Information Systems
Asmaa E. Farahat, Khalid F. A. Hussein, May Abo. El-Hassan
Summary: The paper introduces a design methodology to extend the operation of a microstrip patch antenna to operate at multiple higher-order resonances. The method involves modifying the antenna structure with inductively-loaded and capacitively-coupled elements to enable efficient radiation at desired higher frequencies. The proposed method is not limited to hexagonal patch antennas and can be applied to antennas of arbitrary shapes.
Article
Mathematics, Interdisciplinary Applications
Nitasha Bisht, Praveen Kumar Malik, Sudipta Das, Tanvir Islam, Sivaji Asha, Moath Alathbah
Summary: This article discusses a fractal-based MIMO antenna specifically designed for 5G mm-wave mobile applications. The antenna has multiple resonating frequencies and is suitable for utilization within the millimeter wave application, particularly for the 5G new radio frequency band. The article analyzes various parameters and evaluates the diversity system performance within the MIMO framework.
FRACTAL AND FRACTIONAL
(2023)
Article
Engineering, Electrical & Electronic
Changjiang Deng, Xiaowei Cao, Donghao Li, Weihua Yu
Summary: This paper presents a compact dual-band multiple-input-multiple-output antenna for fifth-generation mobile terminal applications. The antenna consists of four pairs, each including two tightly arranged monopoles. By folding the L-shaped monopoles into U-shaped structures, both the 3.5 GHz band and 4.9 GHz band can share the same decoupling inductor. Addition of stop-band filters enables dual-band operation with a single branch. The size of the antenna pair is only 19 x 4 mm(2), and it has a measured -6 dB bandwidth covering 3.4-3.6 GHz and 4.8-5.0 GHz, with port isolation higher than 12 dB. The measured radiation efficiency ranges from 41% to 59% in the lower band and from 38% to 62% in the upper band.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Chemistry, Analytical
Sayyed A. Ali, Mohd Wajid, Mohammed Usman, Muhammad S. Alam
Summary: This paper introduces a high-order MIMO antenna designed for 5G new radio applications, featuring high isolation and diversity performance, with optimized radiation characteristics and bandwidth.
Article
Engineering, Electrical & Electronic
Weiquan Zhang, Yue Li, Kunpeng Wei, Zhijun Zhang
Summary: This article presents a compact multiple-input-multiple-output (MIMO) microstrip antenna system that covers the 2.4 and 5 GHz wireless local area network (WLAN) bands. The dual-band characteristics are achieved by exciting the TM01 and TM03 modes of a microstrip antenna, using a rectangular slot to improve the radiation capability of the TM03 mode, and utilizing two probes to tune the resonant frequency of the TM01 mode. High interport isolation at the two WLAN bands is achieved through isolation enhancement at the lower and upper-frequency bands, introducing split loops to reduce mutual coupling at the 2.4 GHz band, and adding dipole elements in the rectangular slot for high isolation at the 5 GHz band. The proposed antenna system operates at 2.25-2.63 and at 5.14-6.06 GHz, with measured maximum mutual coupling of less than -15.3 dB at both operating frequency bands.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Durria Abbasi, Abdul Aziz, Khaled Aljaloud, Ali H. Alqahtani, Azzedine Zerguine, Abdullah Al-Garni, Abdul Rehman Chishti, Rifaqat Hussain
Summary: This paper presents a compact 10-element multiple-input multiple-output (MIMO) antenna system for fifth generation (5G) wireless communication system. The antenna structure consists of a T-shaped feeding element and a reduced size capacitively coupled meandered loop radiating element. The proposed MIMO antenna system operates at 3.5 GHz. The MIMO antenna element is self-isolated with a compact size of $13.45\times6$ mm (2). It exhibits excellent isolation of over 15 dB without using any external decoupling structure like a neutralization line or slot technique. Furthermore, the MIMO antenna shows good performance parameters such as a total efficiency of 40-64%, an envelope correlation coefficient (ECC) below 0.02, and gains between 3-3.4dBi for all antennas. The performance of the MIMO antenna is also verified through the measurement of a fabricated prototype.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Wen Wang, Yongle Wu, Weimin Wang, Yuhao Yang
Summary: The high-isolation dual-band antenna design for 5G applications features two closely spaced symmetrical monopole antenna elements. By independently tuning the resonance frequencies of the monopole antenna and using techniques like defected ground structure and a parasitic element, this antenna achieves reduced mutual coupling in the lower band and increased isolation in the higher band.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
