Results 71 to 80 of about 535,313 (240)
A Compact Frequency Reconfigurable Antenna for LTE Mobile Handset Applications
International Journal of Antennas and Propagation, 2015 A compact (8 × 62 × 5 mm3; 2.48 cc) frequency reconfigurable antenna that uses electrical switching with PIN diodes is proposed for the low frequency LTE band (699 MHz–862 MHz), high frequency LTE band (2496 MHz–2690 MHz), GSM850/900 bands (824 MHz–960 ...
Munyong Choi +5 more
doaj +1 more source
Advanced Engineering Materials, Volume 27, Issue 22, November 2025.Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos +8 more
wiley +1 more source
Engineering Reports, Volume 7, Issue 11, November 2025.A combined AWE‐Multigrid approach accelerates RF frequency sweeping by reducing computation time and resources through asymptotic expansions and multilevel grid resolution, validated by numerical experiments demonstrating superior performance over traditional methods.
Lingzhi Ren, Tao Li, Haili Zhang
wiley +1 more source
Fixed and reconfigurable multiband antennas [PDF]
, 2011 This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel UniversityWith the current scenario of development of antennas in the wireless communication field, the need of compact multiband, multifunctional and cost effective ...
Abutarboush, Hattan F
core
Compact planar inverted-F antenna (PIFA) for WiMAX application
, 2009 This paper has focused on the development of multi-band planer inverted-F antenna for use in the three bands WiMAX application. Four slots have been added on the radiated patch to give the required three bands for the WiMAX 2.6, 3.6 and 5.6 GHz, the ...
Nilavalan, R. +7 more
core +1 more source
A Tunable Single-Feed Triple-Band LTE Antenna With Harmonic Suppression
IEEE Access, 2019 This paper presents a single-feed planar inverted-F antenna (PIFA) that operates at three resonant frequencies within the LTE frequency range which would result in the enhancement of the antenna bandwidth and the increase of the data-rate speed.
Abdullah J. Alazemi, Gabriel M. Rebeiz
doaj +1 more source
Rewriting Alkene Frameworks: A Practical Strategy for Nitrogen Incorporation
ChemistryEurope, Volume 3, Issue 5, September 18, 2025.Morandi and team developed a metal‐free method to insert nitrogen into unactivated alkenes, forming amidines and nitriles via a transient aza‐allenium intermediate. Using mild, open‐flask conditions, the process delivers high yields and broad functional group tolerance.
Ranjini Laskar, Frank Glorius
wiley +1 more source
Printed Inverted-F Antenna (PIFA).
, 2019 Typical design and layout of the Printed Inverted-F Antenna (PIFA) which is regularly used in implantation devices.
Floris J. van Zyl (6751556) +3 more
core +1 more source
Analysis of Human Head Interaction in Handset Antennas Using Ground Plane Corrugation
IEEE AccessThis paper presents a novel approach for designing a mobile antenna with a Low Specific Absorption Rate (SAR). First, the relationship between the electric field and the SAR value is constructed based on the Poynting Theorem studied in the near-field ...
Hawraa Moghnieh +3 more
doaj +1 more source
Miniaturization of a PIFA Antenna for Biomedical Applications Using Artificial Neural Networks
, 2018 This work deals with the optimization of an inverted F dual-band implantable antenna operating in Medical Device Radiocommunications Service (MedRadio, 401-406 MHz) and Industrial Scientific Medical (ISM, 902-928 MHz) applications bands.
Asma Djellid +3 more
semanticscholar +1 more source