Results 51 to 60 of about 311,742 (212)

Wearable wideband textile coplanar Vivaldi antenna for medical and IoT application [PDF]

Wearable technologies will be extremely useful in the future life. This research proposes a textile wideband coplanar Vivaldi antenna constructed from a felt substrate and two distinct types of patches, shieldit, and copper tape integrated with a ...
Fahmi, Agam Nizar Dwi Nur, Iskandarianto, Fitri Adi, Wiriawan, Oce, Johari, Safpbri, Nurhayati, Nurhayati, Puspitaningayu, Pradini, Varshney, Atul, Raafi’u, Brian, Al Gburi, Ahmed Jamal Abdullah   +8 more
core   +1 more source

An Electrically Highly Compact Ultra-Wideband Vivaldi Antenna With Substantial Gain Performance

IEEE Open Journal of Antennas and Propagation
In this paper, the design, analysis, fabrication, and measurement of an electrically highly compact ultrawideband Vivaldi antenna is presented. The overall dimensions of the antenna are $0.21\lambda _{0}\times 0.15\lambda _{0}\times 0.002\lambda _{0}$ ,
Ababil Hossain, Samuel Wagner, Stephen Pancrazio, Anh-Vu Pham   +3 more
doaj   +1 more source

On the Relationship Between the Electromagnetic Burst and Inductive Sensor Measurement of a Pulsed Plasma Accelerator

IEEE Access, 2019
A remote and non-invasive diagnostic of the plasma focus using antennas is presented in this work. The main motivation is the application of such diagnostic in a miniaturized plasma accelerator, based on the plasma focus architecture, as a cube satellite
Luis Orellana, Jorge Ardila-Rey, Gonzalo Avaria, Marcos A. Diaz, Cristian Pavez, Roger Schurch, Leopoldo Soto   +6 more
doaj   +1 more source

A 0.7 to 30 GHz Coplanar Vivaldi Antenna

Microwave and Optical Technology Letters, Volume 68, Issue 8, August 2026.
ABSTRACT In the literature there are multiple Vivaldi antenna designs that have a wide impedance bandwidth; however, the usable bandwidth is often limited by pattern degradation at the higher frequencies of the band. This paper presents the design and implementation of a coplanar Vivaldi antenna with a 42.9:1 usable bandwidth ratio (0.7–30 GHz).
Jessica Mundell, Johann Wilhelm Odendaal, Johan Joubert, Bennie Jacobs   +3 more
wiley   +1 more source

Environmental factors associated with nesting habits and age shape the composition and connection between skin and uropygial gland microbiomes of birds

Journal of Animal Ecology, Volume 95, Issue 8, Page 1435-1452, August 2026.
This study provides new insights into how ecological conditions influence the evolution of host‐associated symbiotic communities and their functional roles. The findings suggest that pathogen pressures linked to nesting habits in birds shape bacterial communities of the uropygial gland, and their connection with the skin microbiome, where the ...
Ester Martínez‐Renau, Kasun H. Bodawatta, Antonio M. Martín‐Platero, Manuel Martín‐Vivaldi, María Dolores Barón, Cristina Ruiz‐Castellano, Manuel Martínez‐Bueno, Knud A. Jønsson, Michael Poulsen, Juan José Soler   +9 more
wiley   +1 more source

Low-Profile Dual-Polarized Antenna Integrated with Horn and Vivaldi Antenna in Millimeter-Wave Band

Applied Sciences, 2023
In this paper, a dual-polarized antenna based on a substrate-integrated waveguide (SIW) horn antenna and Vivaldi antenna is proposed. The horizontal polarization (HP) is achieved by using the H-plane SIW horn antenna, while the vertical polarization (VP)
Xiaoyan Yu, Jianxing Li, Jianping Hu, Yuan Yao, Jianwu Li, Sen Yan   +5 more
doaj   +1 more source

Longitudinal Surveillance of Influenza A Virus Exposure in Wild Boars (Sus scrofa) in Spain (2015–2023): Serologic and Virologic Evidence of Subtype Infections and H5N1 Spillover Risk

Zoonoses and Public Health, Volume 73, Issue 3, Page 191-204, May 2026.
ABSTRACT Introduction Influenza A viruses (IAVs) are responsible for respiratory infections in a wide range of species, including birds, swine and humans. The role of wild boar (Sus scrofa) in IAV epidemiology remains underexplored. Here, we present a longitudinal serologic and virologic surveillance study of wild boars in Spain from 2015 to 2023 ...
Paloma Encinas, Aitor Nogales, Estela Escribano‐Romero, M. Ángeles Martín del Burgo, Jorge Ramón López‐Olvera, José Enrique Granados, Gregorio Mentaberre, Adolfo García‐Sastre, Gustavo del Real   +8 more
wiley   +1 more source

A New Antenna Capable of Generating Broadband Plane Spiral Orbital Angular Momentum

IEEE Access
The plane spiral orbital angular momentum (PS-OAM), which is a special form of orbital angular momentum (OAM) beams, solves the problem of OAM beam divergence to some extent.
Na Li, Guirong Feng, Ping Li, Xiaowei Shi   +3 more
doaj   +1 more source

Generation of OAM Radio Waves Using Circular Vivaldi Antenna Array

International Journal of Antennas and Propagation, 2013
This paper gives a feasible and simple solution of generating OAM-carrying radio beams. Eight Vivaldi antenna elements connect sequentially and fold into a hollow cylinder.
Changjiang Deng, Wenhua Chen, Zhijun Zhang, Yue Li, Zhenghe Feng   +4 more
doaj   +1 more source

Resonant Tunneling Diode‐Integrated Terahertz Transceiver Module for Wireless Communications

Advanced Photonics Research, Volume 7, Issue 4, April 2026.
Resonant tunneling diode‐enabled terahertz transceiver module. Terahertz bands are essential for next‐generation wireless communications, offering ultrabroad bandwidth and unprecedented data throughput. However, realizing compact, low‐cost, broadband, and efficient terahertz transceiver modules remains challenging.
Weijie Gao, Nguyen H. Ngo, Daiki Ichikawa, Mingxiang Li, Yuta Inose, Yuki Morita, Hidemasa Yamane, Yoshiharu Yamada, Shuichi Murakami, Yosuke Nishida, Tadao Nagatsuma, Withawat Withayachumnankul, Masayuki Fujita   +12 more
wiley   +1 more source