Article
Engineering, Electrical & Electronic
Yanyang Wang, Sen Yan
Summary: The proposed electrically small 3-D antenna utilizes an H-shaped inductive coupling element to feed the antenna, resulting in the generation of a magnetic dipole and a pair of short electric dipoles after being wrapped in cylindrical foam. By combining orthogonal complementary dipoles with the same radiation intensity and quadrature phase difference, a quasi-isotropic radiation pattern is obtained.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Wei Lin, Richard W. Ziolkowski
Summary: The rectenna system integrates an efficient rectifier circuit and an ultra-thin electrically small antenna on the same substrate, with large electromagnetic wave capturing capability and high dc conversion efficiency. The system is low-cost, easy to fabricate, and suitable for ultra-compact far-field wireless power transfer applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Ming-Chun Tang, Qingli Lin, Mei Li, Richard W. Ziolkowski
Summary: The presented antenna is a specially designed system that can switch between four different polarization states, exhibiting very stable radiation performance.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Nathan Strachen, Elham Mohammadi, John Booske, Nader Behdad
Summary: This study presents the design and experimental demonstration of an active electrically small antenna capable of transmission over the entire HF band. The antenna consists of a 2-m long dipole integrated with a class-AB push-pull amplifier. Experimental results show stable, ultra-wideband operation and total efficiency improvements of over 15 dB compared to passive matching scenarios.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Chih-Min Yu, Meng-Lin Ku, Li-Chun Wang, Feng-Hua Huang, Wen-Kang Jia
Summary: In traditional wireless sensor networks, the multihop routing method leads to a hotspot problem in the sink connectivity area (SCA) and reduces overall network efficiency due to quick battery power depletion. This article proposes a balanced routing algorithm with transmission range adjustment (BRATRA) to address these issues. The algorithm includes a balanced routing strategy to deal with SCA load imbalance and a power control method to achieve even power utilization between layers. Evaluation shows that BRATRA significantly improves power utilization, doubling the network lifetime compared to the conventional strategy.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Zhentian Wu, Ming-Chun Tang, Richard W. Ziolkowski
Summary: This article investigates an electrically small, planar, frequency-agile, beam-switchable Huygens dipole antenna, which utilizes varactor diodes to tune its operating frequency and switch its main beam direction for two independent endfire radiating states. The antenna demonstrates a 5% frequency-agile fractional impedance bandwidth in both states, with high radiation efficiency, peak realized gain, front-to-back ratio, and stable radiation patterns over the frequency-agile range.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Computer Science, Information Systems
Yulong Liu, Mengxia Yu, Bingyi Xia, Silong Wang, Miao Wang, Mingxun Chen, Siqi Dai, Tingzhe Wang, Terry Tao Ye
Summary: The article introduces a textile-based embroidered passive strain and displacement sensor functioned as a UHF RFID antenna, which can modulate RFID chip signals and wirelessly retrieve information from a few meters away without the need for a battery. The sensor is sensitive to strains and displacement caused by body movement, making it ideal for tracking various forms of body movements.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Alexander J. Angilella, Nichole K. Davis, Ian T. McMichael
Summary: This study explores the use of piezocomposite materials for impedance matching in electrically small strain antennas and proposes a methodology for achieving impedance matching without the need for an external network. The study also reveals that the radiation resistance of piezoelectric strain antennas is much smaller than that of similarly sized electric dipole antennas.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Kun Wang, Chih-Min Yu, Li-Chun Wang
Summary: The proposed DORA is a new multichain routing strategy that derives optimal transmission distance and forms multichain structures to reduce energy loss and prolong network lifespan. Simulation results show that DORA doubles network lifespan compared to traditional PEGASIS and improves lifespan by 60% on the RPC protocol.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Computer Science, Information Systems
Muhammad Umar Farooq Qaisar, Xingfu Wang, Ammar Hawbani, Asad Khan, Adeel Ahmed, Fisseha Teju Wedaj, Shamsher Ullah
Summary: This study proposes a trustworthy load-balanced opportunistic routing protocol that utilizes trust and load balancing to ensure reliable and consistent data transmission, improving network performance in terms of energy consumption, latency, throughput, packet delivery, network lifetime, and detection rate.
IEEE SYSTEMS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Ikkurthi Bhanu Prasad, Yogita, Satyendra Singh Yadav, Neeraj Kumar, Vipin Pal
Summary: Clustering techniques, such as the proposed BAT protocol, using the Barabasi-Albert (BA) model and Topsis (T) technique, are effective in balancing the load and energy consumption among sensor nodes in wireless sensor networks. The BAT protocol ensures even energy consumption and avoids energy holes in the network, resulting in a better stable region and balanced energy-efficient consumption compared to other simulated protocols.
IEEE SENSORS JOURNAL
(2023)
Article
Computer Science, Information Systems
Kun Wang, Chih-Min Yu, Meng-Lin Ku, Li-Chun Wang, Wen-Kang Jia
Summary: This article proposes a novel energy-balanced power-efficient gathering scheme (EB-PEGASIS) to improve energy efficiency and utilization in wireless sensor networks. By constructing the shortest network chain and using centralized and distributed algorithms, energy utilization is improved and energy consumption among nodes is balanced.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Computer Science, Information Systems
Anastassia Gharib, Mohamed Ibnkahla
Summary: This article proposes a node embedding with security resource allocation (NESRA) clustering algorithm for mobile ICWSNs, allocating security resources to sensor nodes in three steps to achieve efficient ICWSN operation, data security, and timely data access to mobile users.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Zhentian Wu, Ming-Chun Tang, Ting Shi, Richard W. Ziolkowski
Summary: The antenna features a dual-circularly polarized design with a multilayer stacked layout, radiating left-hand or right-hand CP fields at 1.5 GHz, and exhibits electrical smallness and low profile characteristics, with high port isolation.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Long Cheng, Linghe Kong, Yu Gu, Jianwei Niu, Ting Zhu, Cong Liu, Shahid Mumtaz, Tian He
Summary: In this work, a collision-free convergecast protocol named iCore is proposed for low-duty-cycle WSNs to minimize data collisions and improve channel utilization. iCore utilizes dynamic forwarding technique and optimization algorithms to reduce end-to-end latency and maintain high delivery ratio and energy efficiency in various convergecast scenarios.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)