Results 1 to 10 of about 57,371 (180)

Exploring CP Array Antenna Characteristics and Its Applications to a Deployable Structure [PDF]

Sensors
In this article, we investigated the performance of circularly polarized (CP) array antennas for wireless power transmission (WPT) application. During the development process, three different mounting configurations for the transmitting CP antenna are ...
Tae-Hak Lee, Kyoung-Joo Lee, WonSeob Lim, Sang-Hwa Yi   +3 more
doaj   +2 more sources

Microwave Foreign Object Detection in a Lossy Medium Using a Planar Array Antenna [PDF]

Sensors
The non-contact detection of foreign objects embedded in lossy dielectric media such as soil, vegetation, or ice remains a critical challenge in applications including environmental monitoring and agricultural safety.
Longzheng Yu, Peng Xu, Wenbo Li, Xiao Cai   +3 more
doaj   +2 more sources

Complex System for Monitoring the Patient’s Condition and Diagnosis of Bronchial Asthma [PDF]

Journal of Biomedical Physics and Engineering, 2020
In the present work, three versions of implementation of non-invasive bronchial asthma diagnostic system based on the author’s technique of noninvasive diagnosis of bronchopulmonary diseases are considered.
I V Semernik, A V Dem’yanenko, F S Topalov, O E Semernik, A A Lebedenko   +4 more
doaj   +1 more source

Three-dimensional simplified electrodynamic model of the human chest [PDF]

ITM Web of Conferences, 2019
The results of the development of an accessible threedimensional electrodynamic model of the human chest in a healthy state and in the presence of various pathologies caused by bronchopulmonary diseases are presented. Simulation and experimental study of
Dem'yanenko Alexander, Nevstruev Yaroslav, Semernik Olga   +2 more
doaj   +1 more source

Degrees of Freedom of a K-User Interference Channel in the Presence of an Instantaneous Relay

Entropy, 2022
In this paper, we study the degrees of freedom (DoF) of a frequency-selective K-user interference channel in the presence of an instantaneous relay (IR) with multiple receiving and transmitting antennas.
Ali H. Abdollahi Bafghi, Mahtab Mirmohseni, Masoumeh Nasiri-Kenari   +2 more
doaj   +1 more source

Mathematical model of antenna with nonlinear characteristics for calculating the electromagnetic field in the Fresnel zone

Радіоелектронні і комп'ютерні системи, 2021
The paper presents a mathematical model of radio-electronic systems (RES), which include antennas and their excitation paths with nonlinear characteristics.
Дмитро Вячеславович Грецьких, Василь Олександрович Алєксєєв, Андрій Володимирович Гомозов, Віктор Олександрович Катрич, Михайло Васильович Нестеренко   +4 more
doaj   +1 more source

Solar-Powered Active Integrated Antennas Backed by a Transparent Reflectarray for CubeSat Applications

IEEE Access, 2020
A gain-enhancement scheme that combines an active integrated antenna (AIA) and an optically transparent reflectarray on solar cells is proposed for CubeSat applications.
Yen-Sheng Chen, Yu-Hong Wu, Chia-Chi Chung   +2 more
doaj   +1 more source

Communication Modes With Large Intelligent Surfaces in the Near Field

IEEE Access, 2021
This paper proposes a practical method for the definition of communication modes when antennas operate in the near-field region, by realizing ad-hoc beams exploiting the focusing capability of large antennas. The beamspace modeling proposed to define the
Nicolo Decarli, Davide Dardari
doaj   +1 more source

Short-Range Wireless Transmission in the 300 GHz Band Using Low-Profile Wavelength-Scaled Dielectric Cuboid Antennas

Frontiers in Communications and Networks, 2021
A short-range terahertz (THz) wireless transmission in the 300 GHz band is demonstrated using low-profile wavelength-scaled dielectric transmitting and receiving cuboid antennas (DCAs). These dielectric cuboid antennas are made of polytetrafluoroethylene
Kazuki Yamada, Yuto Samura, Oleg V. Minin, Atsushi Kanno, Norihiko Sekine, Junichi Nakajima, Igor V. Minin, Shintaro Hisatake   +7 more
doaj   +1 more source

Secrecy and BER analysis of antenna sequence spatial modulation: An information theoretic approach

IET Communications, 2022
5G and future generation networks require physical layer security (PLS) to reinforce the security at the higher communication layers. A novel technique of securely transmitting data in a wireless network is presented, by ensuring its security and ...
Joseph A. Obadha, Peter O. Akuon, Vitalis K. Oduol   +2 more
doaj   +1 more source