Article
Chemistry, Analytical
Om Prakash Kumar, Pramod Kumar, Tanweer Ali, Pradeep Kumar, Shweta Vincent
Summary: This article provides an overview of UWB technology, including its origins, importance, various types of UWB antennas, and the concept of UWB notch antennas with different design approaches.
Article
Engineering, Electrical & Electronic
Ondrej Fiser, Vojtech Hruby, Jan Vrba, Tomas Drizdal, Jan Tesarik, Jan Vrba, David Vrba
Summary: This paper presents a compact UWB bowtie antenna and balun circuit for medical MWI applications. The antenna has low reflection coefficient, high radiation efficiency, and can successfully reconstruct images.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Bian Wu, Xiao-Yuan Sun, Hao-Ran Zu, Hong-Hao Zhang, Tao Su
Summary: This paper proposes a transparent ultrawideband halved coplanar Vivaldi antenna with metal mesh film, which has the advantages of UWB impedance matching, miniaturized aperture size, high directivity, and simple feed structure. By using metal mesh film with low sheet resistance and high optical transmittance, the antenna is entirely transparent.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Jungang Yin, Runqi Wu, Jian Yang, Xiangdong Xu, Chong Fan
Summary: A novel ultra-wideband (UWB) microwave diagnostic system based on multimode transferring theory on dielectric waveguides is proposed for accurate detection of internal defects in high voltage polymeric insulators. Simulation and experimental results show promising potential in identifying cracks in energized polymeric insulators based on significant differences in receiving signal levels.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Devisowjanya Potti, Yarasi Tusharika, Mohammed Gulam Nabi Alsath, Savarimuthu Kirubaveni, Malathi Kanagasabai, Radha Sankararajan, Santosh Narendhiran, P. Balaji Bhargav
Summary: A novel optically transparent MIMO antenna for automotive applications is proposed in this article. It consists of a two-semicircular slot-loaded monopole with a staircase ground structure and is developed on a glass substrate. The antenna shows good impedance matching over a frequency of 2.4-11 GHz, with isolation greater than 20 dB and a peak realized gain of 2 dBi, making it suitable for UWB automotive applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Andres Altieri, Magdalena Bouza, Juan Augusto Maya, Cecilia G. Galarza
Summary: This article discusses the design of an impulsive ultrawideband test bed for remote sensing of dielectric targets and estimating moisture content, and experimental results show that the platform can accurately estimate moisture content.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Engineering, Electrical & Electronic
Alexandre Manicoba de Oliveira, Antonio Mendes de Oliveira Neto, Marcelo Bender Perotoni, N. Nurhayati, Henri Baudrand, Arnaldo de Carvalho, Joao Francisco Justo
Summary: This study introduces an oval slot edge antipodal Vivaldi antenna with optimized radiation pattern, showing significant improvements in gain, sidelobe level, and main lobe squint. The proposed antenna is classified in the same category as Palm Tree antennas and has potential for medical applications in near-field microwave imaging.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Linwan Deng, Zhiyi Li, Zhifan Zhao, Xing Chen
Summary: An improved half-biconical antenna using an irregular dielectric lens is designed to resolve beam splitting in high frequency. With the optimized irregular dielectric lens, the radiation beamwidth becomes more concentrated and the boresight gain in the middle and high-frequency bands is improved.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Om Prakash Kumar, Tanweer Ali, Pramod Kumar, Pradeep Kumar, Jaume Anguera
Summary: This paper discusses an elliptical ultrawideband (UWB) antenna and a dual-band UWB notch antenna. The UWB antenna achieves a bandwidth of 2.5-11 GHz with a gain of 4.9 dB and a linear phase response. The dual-band UWB notch antenna rejects WLAN and ITU bands from 5.2-5.7 GHz and 7.2-8.5 GHz, respectively, within the impedance bandwidth of 2.5-11 GHz.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Electrical & Electronic
Yu Yao, Yu Shao, Jiliang Zhang, Jie Zhang
Summary: This article presents a transparent ultrawideband (UWB) multiple-input-multiple-output (MIMO) antenna based on a wired metal mesh (MM) structure. The proposed antenna achieves 77% transparency by hollowing out both metal and substrates into a mesh shape, while maintaining more than 83% radiation efficiency. It can be easily fabricated by conventional printed circuit board (PCB) and laser cutting techniques at a low cost.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Xia Xiao, Qun Yu, Qinwei Li, Hang Song, Takamaro Kikkawa
Summary: The research introduces a noninvasive method for accurately estimating blood glucose concentration using an improved neural network model and hybrid optimization. Experimental results show that this method significantly improves estimation accuracy.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Physics, Applied
Lintao Li, Jingda Wen, Yichen Wang, Yue Jin, Yongzheng Wen, Jingbo Sun, Qian Zhao, Li Bo, Ji Zhou
Summary: In this paper, we design an ultra-broadband transparent polarization converter using a combination of a surface-etched indium tin oxide (ITO)-polyethylene terephthalate (PET) resonator, a laser-cut polymethyl methacrylate (PMMA) layer, and an ITO-PET substrate. The structure simulation shows a co-polarization reflection coefficient of less than -10 dB in the frequency range of 13.1-32.3 GHz. The actual test performance achieves over 90% polarization conversion efficiency in the frequency range of 11.5-25.2 GHz, with wide-angle incidence capability and 53% visible light transmittance. This structure provides a new idea for the future design of ultra-broadband transparent polarization converters and expands their application in optical fields such as RF.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Review
Green & Sustainable Science & Technology
Mageswaran Arunasalam, Zulkiflle B. Leman, B. T. Hang Tuah B. Baharudin, Shamsuddin B. Sulaiman, Charles Santhakumar Anthony Das
Summary: The conversion from leaded soldering processes to lead-free soldering processes in surface mount technology has presented challenges in wave soldering processes, leading to copper dissolution in assemble boards. By using Six Sigma methodology and experimental approaches to control the process, a practical solution was proposed to reduce copper dissolution and decrease the scrappage rate of boards going through the wave soldering process.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Li-Jie Xu, Jiamin Zhang, Zhu Duan, Feng Huang, Yun Li
Summary: This letter proposes a directly connected linear antenna array for ultrawideband applications. By reducing the mutual coupling between adjacent elements and introducing an extra slot mode, the optimization of wide bandwidth, miniaturization, and band notch property is achieved.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Joon-Yong Lee
Summary: In this letter, we propose an ultrawideband channel clustering algorithm using a modified affinity propagation (AP) method. Unlike typical AP algorithms, we define similarity to reflect amplitude discontinuity observed in Saleh-Valenzuela models. The algorithm was tested on simulated channel impulse response and measured propagation data in an indoor environment, and reasonable clustering results were obtained.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Telecommunications
Shariq Mahmood Khan, R. Nilavalan, Abdulhafid F. Sallama
WIRELESS PERSONAL COMMUNICATIONS
(2015)
Article
Instruments & Instrumentation
S. Majidnia, R. Nilavalan, J. Rudlin
Article
Engineering, Electrical & Electronic
Alaa H. Radhi, R. Nilavalan, Yi Wang, H. S. Al-Raweshidy, Amira A. Eltokhy, Nur Ab Aziz
INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES
(2018)
Article
Engineering, Electrical & Electronic
Thomas Peter, Tharek Abd Rahman, S. W. Cheung, Rajagopal Nilavalan, Hattan F. Abutarboush, Antonio Vilches
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2014)
Article
Engineering, Electrical & Electronic
Mohammadreza Behjati, John Paul Cosmas, Rajagopal Nilavalan, Giuseppe Araniti, Massimo Condoluci
IET SCIENCE MEASUREMENT & TECHNOLOGY
(2014)
Article
Instruments & Instrumentation
S. Majidnia, C. Schneider, J. Rudlin, R. Nilavalan
Article
Instruments & Instrumentation
S. Majidnia, J. Rudlin, R. Nilavalan
Article
Engineering, Electrical & Electronic
Alaa H. Radhi, Rajagopal Nilavalan, Yi Wang, Hamed Al-Raweshidy, Amira A. Eltokhy, Nur Ab Aziz
IET MICROWAVES ANTENNAS & PROPAGATION
(2019)
Article
Engineering, Electrical & Electronic
Geoffrey Eappen, T. Shankar, Rajagopal Nilavalan
Summary: The paper proposed an Advanced Squirrel Algorithm (ASA)-trained neural network (NN) for efficient spectrum sensing in air traffic control applications. The proposed ASA-NN showed a high convergence rate in detecting spectrum holes compared to existing metaheuristic-based NN training algorithms.
IET COMMUNICATIONS
(2021)
Article
Computer Science, Artificial Intelligence
Geoffrey Eappen, T. Shankar, Rajagopal Nilavalan
Summary: The paper introduces a Cognitive Radio (CR) technology based relay network to address spectrum overcrowding and network blockage issues. It proposes a novel mutated Modified Whale Optimization Algorithm (MWOA) trained Spiking Neural Network (SNN) based spectrum sensing technique to efficiently detect spectrum holes. The proposed scheme shows state-of-the-art performance in detecting spectrum holes, improving User Equipment (UE) performance in network blockage areas.
APPLIED SOFT COMPUTING
(2022)
Article
Engineering, Electrical & Electronic
Geoffrey Eappen, John Cosmas, T. Shankar, A. Rajesh, Rajagopal Nilavalan, Joji Thomas
Summary: In this paper, a deep learning integrated reinforcement learning algorithm is proposed for intelligent beamforming in B5G networks. The algorithm achieves better performance in terms of signal to noise ratio and accuracy compared to traditional methods, thanks to the combination of reinforcement learning and deep neural networks.
IET COMMUNICATIONS
(2022)
Review
Engineering, Electrical & Electronic
Inas Sawad, Rajagopal Nilavalan, Hamed Al-Raweshidy
Summary: This paper discusses the challenges facing operators, investors, and providers when introducing 5G technology to developing countries. The main focus is on the 5G transport network, particularly the backhaul network. The architectural options and scenarios for the 5G transport network are discussed based on standards and previous studies, and potential new technologies to address the challenges of existing infrastructure in developing countries are considered.
IET COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Song Qiu, Robert Allan, Rajagopal Nilavalan, Jeff Ivey, Steven Butterfield, Maozhen Li
Summary: This study proposes a fail-safe wireless communication architecture for Internet of Things based fire alarm control panels, which is verified to have low latency and high reliability through experiments, and suggests its feasibility for future application in IoT fire safety products.
SN APPLIED SCIENCES
(2021)
Proceedings Paper
Computer Science, Artificial Intelligence
A. Anhar, R. Nilavalan
INTELLIGENT COMPUTING, VOL 2
(2019)
Article
Engineering, Multidisciplinary
Siva Kumar Subramaniam, Shariq Mahmood Khan, Anhar Titik, Rajagopal Nilavalan
IIUM ENGINEERING JOURNAL
(2018)