Article
Engineering, Electrical & Electronic
Zin Mar Phyo, Takafumi Fujimoto, Chai-Eu Gaun
Summary: A compact wideband circularly polarised MIMO antenna with two parasitic elements is proposed in this study. The antenna's gain is improved by installing a one-sided substrate reflector at the back side, and the circularly polarised radiation is enhanced by deploying two parasitic elements. The measured impedance bandwidth with a 3 dB axial ratio is 33.49% from 3.53 to 4.95 GHz, suitable for sub-6 GHz 5G applications. The simulated and experimental results validate the antenna characteristics.
IET MICROWAVES ANTENNAS & PROPAGATION
(2023)
Article
Engineering, Aerospace
Chaoran Hu, Mingchuan Wei, Yuhao Zhao, Lei Chen, Feng Wang, Xibin Cao
Summary: This paper proposes a compact VHF/UHF dual-band helical antenna for Longjiang-2, the first Earth-Moon-transfer microsatellite. The antenna, as a critical component of the amateur radio communication system, needs to be small-sized and provide omnidirectional beam coverage. The novel antenna structure combines a helix and a loaded monopole, achieving a 56% reduction in axial height compared to a conventional helical antenna. Parametric studies are conducted to explore the resonant characteristics, and simulated radiation patterns show that the antenna achieves excellent beam coverage of over 99.9% in space. Measurements in anechoic chamber and in lunar orbit are carried out to validate the design.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Computer Science, Information Systems
Huan-Chu Huang, Jiaguo Lu
Summary: This article innovatively and systematically presents various creative and interesting integrations of millimeter-wave and non-mm-Wave antennas to mobile phones from diverse and practical perspectives. It provides a quick and beneficial understanding of reported works and enlightens further influential developments. The article discusses six types of integrations in terms of their straightforwardness for solution generation and comprehensively compares them based on location, conformality, and transparency. Additionally, it illustrates the insightful evolution of antenna integrations to mobile phones, enabling a clearer picture of the solution considerations, features, and trends.
Article
Engineering, Electrical & Electronic
George V. R. Xavier, Rodrigo de A. Coelho, Hugerles S. Silva, Alexandre J. R. Serres, Edson G. da Costa, Arnaldo S. R. Oliveira
Summary: The study introduces a method for measuring PD signals in high-voltage equipment insulation systems using bio-inspired printed monopole antennas, applying SDWT for signal filtering, and improving the efficiency of PD detection.
IEEE SENSORS JOURNAL
(2021)
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
Engineering, Electrical & Electronic
Daniele Inserra, Guangjun Wen
Summary: A compact and low-profile metal mountable tag device for UHF RFID applications is designed using a PIFA structure. The tag structure includes three lumped elements and a U-shaped slot for post-manufacturing tuning, making it possible to easily restore the design working frequency.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Mingzhe Hu, Yue Li
Summary: This paper proposes a wideband and low-profile microstrip antenna for MIMO applications, which simultaneously excites three modes to achieve wideband radiation. The proposed antenna has a compact size and low profile, making it suitable for 5G mobile MIMO applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Computer Science, Information Systems
Surentiran Padmanathan, Azremi Abdullah Al-Hadi, Ahmed Mohamed Elshirkasi, Samir Salem Al-Bawri, Mohammad Tariqul Islam, Thennarasan Sabapathy, Muzammil Jusoh, Prayoot Akkaraekthalin, Ping Jack Soh
Summary: This paper presents the design of a multiband MIMO antenna with frequency and radiation pattern reconfiguration capability in the 5G sub-6 GHz band. The antenna achieves high isolation and satisfactory MIMO diversity performance, enabling reliable and consistent data throughput for 5G mobile terminals.
Article
Computer Science, Information Systems
Dongjie Qin, Baohua Sun
Summary: A miniaturized ferrite-EBG composited choke structure is proposed to enhance the choke performance and efficiency. The choking effects of the proposed structures are measured by the |S-21| parameter of the measuring device, and the influence of different numbers of structures is studied. The final designed composite structure size is 0.25λ(L) x 0.024λ(L) x 0.024λ(L), with a choking band of 181-343 MHz.
Article
Engineering, Electrical & Electronic
Ping Yin, Zongliang Zheng
Summary: This paper presents a low-profile and wideband unidirectional antenna with ferrite loading for ultrahigh-frequency (UHF) applications. The ferrite loading plays a crucial role in improving the performance of the antenna. By introducing ferrite, the impedance matching, bandwidth, efficiency, and gain of the antenna can be improved.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Huan-Chu Huang, Jiaguo Lu
Summary: This article reviews and looks forward to the innovative evolution of 5G millimeter-wave antenna designs integrating non-mm-wave functions through the AiP solution. These designs, such as AiPiA, AiPaA, and AiPiaA, advance towards providing total solutions for 5G antennas in cellular phones, benefiting antenna designers, space utilization in phones, and applications of 5G antennas.
Article
Multidisciplinary Sciences
Mouaaz Nahas
Summary: This paper focuses on the application of microstrip patch antennas in the high-band millimeter waves of 5G, specifically the 26 and 28 GHz frequency bands. The study aims to improve the antenna gain by adding slots with L and I shapes to a single rectangular patch. The experimental results demonstrate that inserting symmetric LI slots and a rectangular slot in the middle can achieve a very high gain.
JOURNAL OF RADIATION RESEARCH AND APPLIED SCIENCES
(2022)
Article
Engineering, Electrical & Electronic
Alexandros-Apostolos A. Boulogeorgos, Josep Miguel Jornet, Angeliki Alexiou
Summary: Utilizing terahertz wireless systems for high-data-rate networks presents challenges such as high propagation losses and low signal penetration of (sub)millimeter waves.
IEEE VEHICULAR TECHNOLOGY MAGAZINE
(2021)
Article
Telecommunications
Thaisa Jawhly, Ramesh Chandra Tiwari
Summary: Empirical propagation loss models are crucial in wireless communication systems due to their cost-effectiveness and simplicity. This letter presents a mathematical characterization of the FCC F(50,50) curve for VHF and UHF bands. The proposed empirical model is based on a novel step-wise curve fitting of FCC signal strength data. It is straightforward and can be readily implemented in VHF and UHF signal loss calculations with minimal input parameters.
IEEE COMMUNICATIONS LETTERS
(2023)
Article
Telecommunications
Thaisa Jawhly, Ramesh Chandra Tiwari
Summary: Empirical propagation loss models are important in wireless communication systems due to their cost-effectiveness and simplicity. This letter presents a mathematical characterization of the FCC F(50,50) curve for VHF and UHF bands. The proposed empirical model fits FCC signal strength data and can be applied to TV broadcasting systems. A simple mathematical expression is also proposed for a 100 km distance with antenna heights ranging from 30 to 300 m, which agrees well with the F(50,50) curve data. This model is straightforward and requires minimal input parameters for VHF and UHF signal loss calculation.
IEEE COMMUNICATIONS LETTERS
(2023)