Results 41 to 50 of about 13,252 (205)

Implementation and Investigation of a Compact Circular Wide Slot UWB Antenna with Dual Notched Band Characteristics using Stepped Impedance Resonators [PDF]

, 2012
A coplanar waveguide (CPW) fed ultra-wideband (UWB) antenna with dual notched band characteristics is presented in this paper. The circular wide slot and circular radiation patch are utilized to broaden the impedance bandwidth of the UWB antenna.
Tao Jiang, Wenxing Li, Yingsong Li
core   +1 more source

Optimized Multiband Circularly Polarized Patch Antenna With Coupled Sub‐Patches for Wireless Applications

Microwave and Optical Technology Letters, Volume 67, Issue 10, October 2025.
ABSTRACT In this paper, a high gain multiband patch antenna is designed and analyzed for use in wireless applications. Coupled sub‐patches are integrated around a central hexagonal patch to extend the operating frequency and improve gain across multiple frequency bands.
Mahdi Abdelkarim, Majdi Bahrouni, Ali Gharsallah   +2 more
wiley   +1 more source

Transmission coefficient estimation based on antenna voltage standing wave ratio under plasma sheath

AIP Advances, 2018
Radio blackout has confused the aerospace industry for decades. The highly attenuated caused by the plasma sheath is the main cause of radio blackout. The transmission coefficient depends on the relationship between plasma density, collision frequency ...
Min Yang, Xiaoping Li, Bowen Bai, Ze Li, Bosheng Xue   +4 more
doaj   +1 more source

Multi‐Dimensional Multiplexed Metasurface for Multifunctional Near‐Field Modulation by Physics‐Driven Intelligent Design

Advanced Science, Volume 12, Issue 27, July 17, 2025.
The expansive design space of advanced metasurfaces, particularly those with multiple degrees of freedom (MDOF), renders traditional design methods less effective. A physics‐driven intelligent design is proposed for MDOF metasurfaces, which integrates physical knowledge into neural networks, enhancing interpretability and computational efficiency. This
Jian Lin Su, Zi Xuan Cai, Yiqian Mao, Long Chen, Xin Yi Yu, Zhi Cai Yu, Qian Ma, Si Qi Huang, Jianan Zhang, Jian Wei You, Tie Jun Cui   +10 more
wiley   +1 more source

Estimation of dielectric constant for various standard materials using microstrip ring resonator [PDF]

, 2017
Microstrip ring resonator (MRR) is known for dielectric constant determination and many studies used Teflon as a standard sample. However, there are many other materials available which able to perform better or equivalence as the Teflon in calibrating ...
Abbas, Zulkifly, Esa, Fahmiruddin, Low, Pek Jin, You, Kok Yeow   +3 more
core   +1 more source

A Novel Design Technique for Ultrawideband Shared Aperture Connected Dipole Arrays

Microwave and Optical Technology Letters, Volume 67, Issue 7, July 2025.
ABSTRACT This paper presents comprehensive circuit models for the design and analysis of ultrawideband shared aperture antenna arrays. A novel semi‐analytical approach is developed by modifying the previous equivalent circuit model to enable the calculation of the electromagnetic (EM) transparency of dipole array unit cells.
Kaan Arda, Gülbin Dural
wiley   +1 more source

Antena Mikrostrip Double E-Shaped dengan Frekuensi 3,3 GHz untuk Aplikasi WiMax

Jurnal Elkomika, 2022
ABSTRAK Antena mikrostrip double E-shaped untuk aplikasi WiMax melalui proses simulasi dan fabrikasi telah berhasil dirancang. Perancangan desain antena mikrostrip ini menggunakan bahan substrat FR-4 lossy dengan ketebalan 1,6 mm dan konstanta ...
MUTMAINNAH MUTMAINNAH, CHOIRINA RACHMA NUR OCTAVINA, LUTFI ROHMAN, ROHIM AMINULLAH FIRDAUS   +3 more
doaj   +1 more source

Remote sensing reveals inter‐ and intraspecific variation in riparian cottonwood (Populus spp) response to drought

Journal of Ecology, Volume 113, Issue 7, Page 1760-1779, July 2025.
Leaf‐level spectroscopy and canopy‐level UAV thermal data captured inter‐ and intraspecific responses to water stress in cottonwoods, which are widely distributed in arid environments. This study demonstrates the potential of remote sensing to monitor and predict the impacts of drought on scales varying from leaves to landscapes. Abstract Understanding
Megan M. Seeley, Benjamin C. Wiebe, Catherine A. Gehring, Kevin R. Hultine, Bradley C. Posch, Hillary F. Cooper, Elena A. Schaefer, Beatrice M. Bock, Andrew J. Abraham, Madeline E. Moran, Arthur Keith, Gerard J. Allan, Maya Scull, Thomas G. Whitham, Roberta M. Martin, Gregory P. Asner, Christopher E. Doughty   +16 more
wiley   +1 more source

Ultra-Wideband Dual-Polarized Antenna With Three Resonant Modes for 2G/3G/4G/5G Communication Systems

IEEE Access, 2019
In this paper, a compact dual-polarized ultra-wideband dipole antenna is realized by exciting three resonant modes using double-loop (DL) dipoles with stepped exponential-shaped (ES) arms.
Yaohui Zhang, Yonghong Zhang, Daotong Li, Kunning Liu, Yong Fan   +4 more
doaj   +1 more source

Fractal Patch Antenna Based on Photonic Crystal for Enhanced Millimeter‐Wave Communication in Intelligent Transportation Systems

Radio Science, Volume 60, Issue 5, May 2025.
Abstract This paper introduces a Fractal Patch Antenna (FPA) integrated with Photonic Crystals (PhC) designed for Intelligent Transportation Systems (ITS) in the Millimeter‐wave bands (mmWaves) given the importance of the application of mmWaves in Vehicle‐to‐Everything (V2X) networks, we assumed, as examples, that the antenna is designed to resonate at
Nila Bagheri, Jon M. Peha, Fernando J. Velez   +2 more
wiley   +1 more source