Results 51 to 60 of about 601,761 (190)

Filtering Horn Antenna Using Planar Quasi-Elliptical Frequency Selective Surface

IEEE Access
Fabrication and characterization of a planar frequency selective surface (FSS) integrated filtering horn antenna is presented in this paper. The proposed FSS with shorting-pins is systematically designed to achieve an elliptical transmission response ...
Chithra Margabandhu, D. Kannadassan
doaj   +1 more source

Sex and Chronic Stress Alter the Distribution of Corticotropin‐Releasing Factor Receptor in Rat Hippocampus Following Oxycodone Conditioned Place Preference

Synapse, Volume 80, Issue 5, September 2026.
Chronic stress modifies the effect of oxycodone conditioned place preference (Oxy CPP) on corticotropin releasing factor 1 (CRFR1) subcellular distributions in hippocampal subregions. These stress‐ and oxycodone‐induced changes in CRFR1 density may influence sex differences in hippocampal learning and memory processes both at baseline and following Oxy
Dana N. Silberstein, Zoha Baig, Batsheva Rubin, Fangmin Yu, Joshua Kogan, Jason D. Gray, Yan Zhou, Teresa A. Milner   +7 more
wiley   +1 more source

Design of a Non-Pyramidal Modeled Waveguide Horn Antenna for WLAN 2.4 GHz Communication System [PDF]

, 2020
The indoor antenna characteristic measurement is usually affected by electromagnetic wave reflection and other signals interference which cause the strength of a received signal decreased or sometimes increased. With a standard scientific methodology i.
Patras, Max Alexander Rura, Rompis, Lianly   +1 more
core   +1 more source

Low‐Profile, High‐Gain GRIN RF Lenses via Multi‐Material Vat Photopolymerization

Advanced Functional Materials, Volume 36, Issue 53, 2 July 2026.
We investigate the opportunity of leveraging multi‐material vat photopolymerization printing to manufacture intricate lenses exhibiting permittivity gradients that can increase signal gain in transmitted radiofrequency signals in the X‐ and Ku‐bands. Lenses produced with more distinct low‐loss materials (up to 5) can deliver an 18 dB signal gain with a
Lawrence Romangsuriat, Alexander Peraire‐Bueno, A. John Hart, Randall M. Erb   +3 more
wiley   +1 more source

Computer Vision for Monitoring Wild Bees and Wasps: A Structured Literature Review

Ecology and Evolution, Volume 16, Issue 7, July 2026.
This review surveys recent (2020–2026) computer vision research on automated monitoring of wild bees and wasps, covering tasks such as species detection, habitat observation, and behavior analysis. It analyzes datasets, public resources, hardware, and software development.
Chenchang Liu, Patrick Mäder, Marco Seeland   +2 more
wiley   +1 more source

Design of a broadband double-ridged horn antenna [PDF]

, 2023
This report presents the design, simulation, fabrication, and measurement of a broadband double-ridged horn antenna. To become familiar with the basic antenna design process, a non-ridged pyramidal horn antenna was initially developed.
Jang, Yeongho
core  

A configuration to double the gain of pyramidal horn antenna using single layer frequency selective surface

IET Microwaves, Antennas & Propagation
A gain enhancement technique in pyramidal horn antenna using a slot type band pass frequency selective surface (FSS) is presented. The horn antenna without FSS has achieved a measured gain of 10.5 dBi at 10 GHz, while the antenna with the single layer ...
Kalyan Mohan Patnaik, Gowrish Basavarajappa   +1 more
doaj   +1 more source

The Moniliophthora roreri Effector MrB1 Affects Cellular Homeostasis and Induces Genotype‐Dependent Necrosis in Theobroma cacao

Molecular Plant Pathology, Volume 27, Issue 7, July 2026.
The effector MrB1 induces cytotoxicity in plant cells through oxidative stress, membrane damage, protein folding collapse, and energy failure. These alterations compromise cellular integrity and result in necrosis. ABSTRACT Frosty pod rot (FPR) is an invasive disease responsible for severe yield losses of cacao trees.
Taís Araújo Santos, Maria Luíza do Carmo Santos, Monaliza Macêdo Ferreira, Keilane Silva Farias, Carlos Henrique de Carvalho Neto, Ronan Xavier Corrêa, Uilson Vanderlei Lopes, Carlos Priminho Pirovani   +7 more
wiley   +1 more source

Optically Transparent Ka‐Band Absorber With Multi‐Fractal Rings and a Metal Mesh Ground Plane

Microwave and Optical Technology Letters, Volume 68, Issue 6, June 2026.
ABSTRACT An optically transparent absorber based on multi‐fractal ring resonators and a metal mesh ground plane is presented for Ka‐band applications. By merging multiple resonances, the proposed absorber maintains an absorption bandwidth from 25.8 to 31.1 GHz.
Junseong Bae, Seoyeong Min, Suho Chang, Daehyeon Kim, Donggeun An, Wonbin Hong, Youngno Youn   +6 more
wiley   +1 more source

Modeling and Practical Implementation of a Broadband Double-Ridged Horn Antenna with an Operating Range More Than an Octave and a High Level of Cross-Polarization Discrimination

Известия высших учебных заведений России: Радиоэлектроника, 2019
Introduction. The resolution of the problem of radio polarimetry in multiposition microwave screening systems (MMSS) with aperture synthesis requires the use of antennas with a high level of cross-polarization discrimination (XPD) in a wide spatial angle.
Viktor V. Meshcheriakov, Natalia V. Markova, Pavel D. Iurmanov   +2 more
doaj   +1 more source