Results 51 to 60 of about 149,488 (210)

Design of Miniaturized Antipodal Vivaldi Antennas for Wideband Microwave Imaging of the Head

, 2022
Many wideband applications, e.g., microwave imaging of the head, require low-frequency (~1–6 GHz) operation using small antennas. Vivaldi antennas are extensively used in multifarious wideband applications; however, the physical dimensions of the ...
Farhana Parveen, Parveen Wahid
core   +1 more source

Ladder Arrangement Method for Stealth Design of Vivaldi Antenna Array

International Journal of Antennas and Propagation, 2013
A novel stealth design method for X-band Vivaldi antenna arrays is proposed in this paper by ladder arrangement along radiation direction. Two-element array, eight-element array, and 3 × 7-element array are investigated in this paper. S parameters, RCSs,
XiaoXiang He, SaiSai Huang, Teng Chen, Yang Yang   +3 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

Metamaterial Vivaldi Antenna Array for Breast Cancer Detection

Sensors, 2022
The objective of this work is the design and validation of a directional Vivaldi antenna to detect tumor cells’ electromagnetic waves with a frequency of around 5 GHz.
Marwa Slimi, Bassem Jmai, Hugo Dinis, Ali Gharsallah, Paulo Mateus Mendes   +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

Scale‐Invariant Waveguiding in Flatland

Exploration, Volume 6, Issue 1, February 2026.
The study introduces scale‐invariant metasurface waveguides with uniform modal field distribution and an effective index independent of the core width. By leveraging spatial symmetry and fine‐tuning mode profiles, the design is validated through near‐field measurements in the C band, offering potential applications in flat optics, sensing, and ...
Zhixia Xu, Shuo Bao, Massimo Moccia, Giuseppe Castaldi, Tie Jun Cui, Vincenzo Galdi   +5 more
wiley   +1 more source

CP metasurfaced antennas excited by LP sources [PDF]

, 2012
A metasurface which is considered as a polarizer for microwave antennas is proposed in this paper. Preliminary results have shown that circularly polarized (CP) radiation can be obtained from linearly polarized (LP) source antennas with the use of ...
T. I. Yuk, Zhu, Hailiang, S. W. Cheung, Cheung, SW, Cheung, S. W., Zhu, H, Chung, Kwok L. (R17316), Chung, KL, Hailiang Zhu, Yuk, TI, X. L. Sun, Kwok L. Chung, Yuk, Tong I., Sun, X, Sun, X. L.   +14 more
core   +1 more source

Ultra‐wideband antenna system for in‐band full‐duplex applications

IET Microwaves, Antennas & Propagation, 2021
In this study, we present an ultra‐wideband full‐duplex system constituted of a wideband 4‐element Vivaldi array and wideband microstrip‐to‐slotline baluns.
Hadi Hijazi, Marc Le Roy, Raafat Lababidi, Denis Le Jeune, Andre Pérennec   +4 more
doaj   +1 more source

Parametric Analysis and Bandwidth Optimisation of Hybrid Linear-exponential Tapered Slot Vivaldi Antennas [PDF]

, 2018
This work presents an analysis of the effects of a hybrid linear-exponential tapered slot on the key properties of both the antipodal and co-planar Vivaldi antennas at low frequencies using parametric analysis and Nonlinear Sequential Programming ...
Ukaegbu, Ikechukwu K., Gamage, Kelum A.A.   +1 more
core   +1 more source

A Vivaldi Antenna For 5G Communications

, 2021
A vivaldi antenna intended for the 5G correspondence applications with a working recurrence of 3.52GHz. A vivaldi radiator is been associated with the microstrip line which permits equivalent progression of capacity to the emanating component. Fire resistant glass epoxy acted as substrate and a 50ω microstrip feed is utilized to energize the antenna ...
openaire   +1 more source