Results 51 to 60 of about 21,050 (313)

Slot Parameter Optimization for Multiband Antenna Performance Improvement Using Intelligent Systems

International Journal of Antennas and Propagation, 2015
This paper discusses bandwidth enhancement for multiband microstrip patch antennas (MMPAs) using symmetrical rectangular/square slots etched on the patch and the substrate properties. The slot parameters on MMPA are modeled using soft computing technique
Erdem Demircioglu, Ahmet Fazil Yagli, Senol Gulgonul, Haydar Ankishan, Emre Oner Tartan, Murat H. Sazli, Taha Imeci   +6 more
doaj   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Simple SLL Reduction Method for an SIW Longitudinal Slot Array Antenna

IEEE Access
The deployment of Ka-band radar necessitates addressing increased losses due to rain and free-space propagation, in addition to achieving low sidelobe levels (SLL).
Deokjin Seo, Junmo Choi, Jongin Ryu, Kyung-Young Jung   +3 more
doaj   +1 more source

Aqueously Upcycled Lignin with Emergent Tribonegativity for Skin‐Integrated Triboelectronics

Advanced Materials, EarlyView.
Aqueously upcycled lignin is transformed into a printable ink that self‐assembles into a nanotextured surface during printing with the highest reported biopolymer‐based tribonegativity. The resulting skin‐integrated triboelectric sensor enables high‐fidelity cardiovascular monitoring and objective mental workload classification, demonstrating a ...
Robert Ccorahua‐Santo, Mi Li, Yi Zheng, Wenzhuo Wu   +3 more
wiley   +1 more source

A COMPACT CIRCULARLY POLARIZED SLOTTED MICROSTRIP ANTENNA [PDF]

ICTACT Journal on Communication Technology, 2014
Slot antennas are often used at UHF and microwave frequencies. In slot antenna for RFID reader applications the frequency ranges from 902-923MHz to achieve circular polarization.
V. Jebaraj, K.R.S. Ravi Kumar, D. Mohanageetha   +2 more
doaj  

Millisecond‐Switching Dual‐Band/Dual‐Polarization Ka‐Band Wavefront Control Enabled by a Complementary Liquid‐Crystal Metasurface

Advanced Materials Technologies, EarlyView.
An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim, Donggeun An, Hyunjae Shin, Youngno Youn, Wonbin Hong   +4 more
wiley   +1 more source

A Broadband Circularly Polarized Antenna with Stable Gain Based on Square Slotted Ground [PDF]

, 2023
Mingshun Li, Wei Song, Xin‐Qing Sheng
openalex   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

TADF‐Emitting Dendrimers for Scalable Bar‐Coating Fabrication of Light‐Emitting Electrochemical Cells

Advanced Materials Technologies, EarlyView.
TADF‐emitting dendrimers promise to enable scalable solution‐based fabrication of efficient electroluminescent devices by the virtue of an attractive set of properties. Here, we report on how light‐emitting electrochemical cells, comprising the TADF‐dendrimer tBuCz2m2pTRZ, can be fabricated by scalable bar‐coating under ambient air and deliver uniform ...
Shi Tang, Dianming Sun, Christian Larsen, Erik Zäll, Eli Zysman‐Colman, Ludvig Edman   +5 more
wiley   +1 more source

Integrated Solar Panel Slot Antennas Certified for CubeSat Missions

IEEE Open Journal of Antennas and Propagation
This paper presents three prototypes of cavity-backed slot antennas integrated with solar panels. The antenna design is straightforward and requires minimal alteration on the solar panel’s geometry.
Mahmoud N. Mahmoud, Reyhan Baktur
doaj   +1 more source