Results 91 to 100 of about 1,659 (296)

Distributed Diode Single-Balanced Mixer Using Defected and Protruded Structures for Doppler Radar Applications

, 2015
In this paper, a single-balanced diode mixer using defected and protruded structures for wireless application is presented. The operating frequency is selected for WLAN applications.
Ebrahimian, H., Ojaroudi, M., Ghadimi, N., Ojaroudi, N.   +3 more
core  

Circuit model for microstrip array antenna with defected ground structures for mutual coupling reduction and beamforming applications

, 2021
A microstrip array antenna (MAA) structure incorporated with an orthogonal I-shaped defected ground structure (OI-DGS) was proposed and investigated and its equivalent circuit was created.
Shaharil Mohd Shah, Subhi, Khalid, Goh Chin Hock, Goh, Chin Hock, Che Seman, Fauziahanim, Hamzah, Shipun Anuar, Mohd Shah, Shaharil, Ahmad, Khalid Subhi, Shipun Anuar Hamzah, Fauziahanim Che Seman   +9 more
core   +1 more source

Quad-Directional Vivaldi Antenna With Sub-Band Gain Enhancement Based on SSPP

IEEE Open Journal of Antennas and Propagation
This paper presents a wideband, high-gain four-directional Vivaldi antenna that employs a novel band-divided optimization strategy. The approach partitions the 2.5–4.5 GHz band into four sub-bands, each assigned to a dedicated radiation direction ...
Shuangshuang Zhu, Xinlong Bi, Yang Shao, Xiaoyuan Wang, Yi Song   +4 more
doaj   +1 more source

A good conversion loss and a very high LO-to-RF isolation of 24-GHz single balanced mixer for RF front-end receiver [PDF]

Maejo International Journal of Science and Technology, 2011
This work describes the design, analysis and fabrication of a 24-GHz microwave single balanced down-conversion mixer based on Schottky diode, hybrid ring coupler and a wide and deep stopband low-pass filter (LPF).
Mouloud Challal
doaj  

Electrochemical Evaluation of Compressed Selective Laser Melted AlSi7Mg and AlSi10Mg Alloys in Chloride Environment

Advanced Engineering Materials, EarlyView.
The corrosion performance of AlSi7Mg and AlSi10Mg alloys produced through selective laser melting (SLM) was examined under compressive stress in a chloride environment. Electrochemical analyses, including open‐circuit potential (OCP), potentiodynamic polarization (CPP), and electrochemical impedance spectroscopy (EIS), were complemented by scanning ...
Femi John Akinfolarin, Samson Dare Oguntuyi, Peter Apata Olubambi   +2 more
wiley   +1 more source

A Low Correlation and Mutual Coupling MIMO Antenna

IEEE Access, 2019
A new two-element multiple-input multiple-output (MIMO) antenna with low correlation and high port isolation is presented. First, two hybrid electromagnetic band gap (EBG) structures with the ability to support and stop surface wave propagation ...
Ying Liu, Xu Yang, Yongtao Jia, Y. Jay Guo   +3 more
doaj   +1 more source

Innovative Processing of Compacted Waste Aluminum Alloy Powders via Controlled Remelting and Solidification

Advanced Engineering Materials, EarlyView.
This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira, Marcella Gaute Cavalcante Xavier, Abdoul‐Aziz Bogno, Piter Gargarella, José Eduardo Spinelli   +4 more
wiley   +1 more source

Design of a Common-Mode Rejection Filter Using Dumbbell-Shaped Defected Ground Structures Based on Equivalent Circuit Models

, 2023
An efficient design method is proposed for a compact common-mode rejection (CMR) filter utilizing dumbbell-shaped defected ground (DS-DG) structures and gap-coupled stub (GCS) resonators.
Sachin Kumar, Kang-Wook Kim, Byung-Cheol Min, Hyun-Chul Choi, Jeong-Sik Choi, Mun-Ju Kim   +5 more
core   +1 more source

An FSS Based Multiband MIMO System Incorporating 3D Antennas for WLAN/WiMAX/5G Cellular and 5G Wi-Fi Applications

IEEE Access, 2019
A compact 3-dimensional dual-element, multiband antenna for Multi-Input-Multi-Output (MIMO) applications is proposed in this paper. Folding technique along with various impedance matching structures are employed for miniaturization and multiband ...
Rashid Saleem, Muhammad Bilal, Hassan Tariq Chattha, Sabih Ur Rehman, Anum Mushtaq, Muhammad Farhan Shafique   +5 more
doaj   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source