Results 61 to 70 of about 1,055 (144)

Electrically Small Huygens Dipole Rectennas for Wirelessly Powering Internet-of-Things Sensors [PDF]

, 2020
© 2020 EurAAP. Linearly-polarized (LP) and circularly-polarized (CP) electrically small Huygens dipole rectennas for wirelessly powering compact Internet-of-Things (IoT) sensors at 915 MHz in the ISM band are reported.
Ziolkowski, RW, Wei Lin, Lin, W, Richard W. Ziolkowski   +3 more
core   +1 more source

Analysis of the Optimum Gain of a High-Pass L-Matching Network for Rectennas

Sensors, 2017
Rectennas, which mainly consist of an antenna, matching network, and rectifier, are used to harvest radiofrequency energy in order to power tiny sensor nodes, e.g., the nodes of the Internet of Things.
Manel Gasulla, Josep Jordana, Francesc-Josep Robert, Jordi Berenguer   +3 more
doaj   +1 more source

A Comprehensive Review of Battery‐Free Energy Efficient RF and Microwave Systems

Journal of Engineering, Volume 2026, Issue 1, 2026.
Battery‐free radiofrequency (RF) and microwave systems have emerged as a promising solution for enabling long‐lifetime, maintenance‐free wireless sensing and communication platforms by eliminating conventional battery dependence. These systems operate by harvesting ambient or dedicated electromagnetic energy, converting it to usable electrical power ...
Stella N. Arinze, Augustine O. Nwajana, Vijayanandh Raja   +2 more
wiley   +1 more source

Harnessing the Power of 2D Materials for Flexible Energy Harvesting Applications

Carbon Energy, Volume 7, Issue 12, December 2025.
Ambient energy harvesting offers transformative potential for sustainable energy solutions, with 2D materials emerging as a game‐changing platform due to their atomic‐scale thickness, tunable properties, and versatility. This review explores the mechanisms, advantages, and challenges of 2D material–based energy harvesting technologies, emphasizing ...
Muhammad Zubair, Dongseong Lee, Dae Joon Kang   +2 more
wiley   +1 more source

Enabling flexible, wearable, and implantable electronics with radio frequency‐based wireless charging: Fundamentals, challenges, and emerging applications

FlexMat, Volume 2, Issue 4, Page 493-509, December 2025.
This paper presents a comprehensive review of radio frequency (RF)‐based wireless charging technologies for flexible electronics. In particular, we (i) provide an overview of wireless charging approaches, (ii) investigate the fundamental RF charging principles, covering rectenna design, impedance matching, RF‐to‐DC conversion, and power management, and
Qu Luo, Wenhui Ji, Yu Yin, Zhensheng Chen, Jing Zhu, Lin Li, Gaojie Chen   +6 more
wiley   +1 more source

Numerical Analysis of MIM-Based Log-Spiral Rectennas for Efficient Infrared Energy Harvesting

Sensors, 2020
This work presents the design and analysis of a metal-insulator-metal (MIM)-based optical log spiral rectenna for efficient energy harvesting at 28.3 THz.
Ali Yahyaoui, Ahmed Elsharabasy, Jawad Yousaf, Hatem Rmili   +3 more
doaj   +1 more source

High‐Efficiency Millimeter‐Wave Scalable Rectenna Array With Individual Impedance Control

International Journal of Circuit Theory and Applications, Volume 53, Issue 11, Page 6143-6151, November 2025.
This study proposes a millimeter‐wave scalable rectenna array with individual fundamental and second harmonic impedance control for high‐efficiency wireless power transfer. The array integrates rectifiers, patch antennas, and a DC combining network, ensuring effective impedance matching and optimal power conversion while maintaining independent control
Yeonsoo Kim, Sooyoung Oh, Kyungbin Cho, Hojin Lee, Sun K. Hong, Juntaek Oh   +5 more
wiley   +1 more source

Nano-rectenna powered body-centric nano-networks in the terahertz band

Healthcare Technology Letters, 2018
A wireless body-centric nano-network consists of various nano-sized sensors with the purpose of healthcare application. One of the main challenges in the network is caused by the very limited power that can be stored in nano-batteries in comparison with ...
Zhichao Rong, Mark S. Leeson, Matthew D. Higgins, Yi Lu   +3 more
doaj   +1 more source

Determining the Direction of Radio Wave Reception for Maximum Radiation Using Genetic Algorithm and RF to DC Conversion Efficiency Analysis

Engineering Reports, Volume 7, Issue 9, September 2025.
In this study, a new plan for routing radio transmitters is presented using an algorithm compatible with RFEH. The proposed algorithm is based on the genetic algorithm (GA), and in an innovation, using the HPBW in the GA creates a population for initial sampling dependent on the receiver antenna.
S. Hosseini, Changiz Ghobadi, Javad Nourinia, M. Shokri   +3 more
wiley   +1 more source

Harnessing Dynamic Electrostatic Fields for Energy Generation with Diode Cells

Advanced Science, Volume 12, Issue 28, July 24, 2025.
Stationary diode cells (DiCes) are fabricated to harvest energy from dynamically changing electrostatic fields by leveraging the unique current modulation properties of diodes. The DiCes can directly output DC voltage and current. Their applications range from energy harvesting and powering implanted devices to use in sensors.
Renyun Zhang, Magnus Hummelgård, Ye Xu, Martin Olsen, Jonas Örtegren, Göran Thungström, Henrik Andersson, Zhong Lin Wang   +7 more
wiley   +1 more source