Results 51 to 60 of about 1,855 (196)
Antenna Gain and Link Budget for Waves Carrying Orbital Angular Momentum (OAM)
, 2015 This paper addresses the RF link budget of a communication system using unusual waves carrying an orbital angular momentum (OAM) in order to clearly analyse the fundamental changes for telecommunication applications.
Capet, Nicolas +5 more
core +3 more sources
Magnetic Resonance in Medicine, Volume 94, Issue 5, Page 2268-2285, November 2025.Abstract Purpose High‐resolution ex vivo diffusion‐weighted imaging (dMRI) with high b$$ b $$‐values presents significant challenges, including low signal‐to‐noise ratio (SNR), magnetic field perturbations, and temperature‐related measurement shifts.
Alina Müller +14 more
wiley +1 more source
An ohmic RF MEMS switch for reconfigurable microstrip array antennas built on PCB [PDF]
, 2008 This paper presents the analysis, design and simulation of an ohmic RF MEMS switch specified for reconfigurable microstrip array antennas built on PCB via an integrated monolithic technology.
Charalampidis, N +6 more
core
Electronics Letters, Volume 61, Issue 1, January/December 2025.Here, we proposed a target recognition method of natural resonant complex frequency under low Signal‐to‐Noise Ratio (SNR), mainly to solve the problem that natural resonant frequency is greatly affected by noise while the recognition accuracy is low.
Yonggang Li +4 more
wiley +1 more source
Investigating Equations Used to Design a Very Small Normal-Mode Helical Antenna in Free Space
International Journal of Antennas and Propagation, 2018 A normal-mode helical antenna (NMHA) has been applied in some small devices such as tire pressure monitoring systems (TPMS) and radio frequency identification (RFID) tags.
Dang Tien Dung +3 more
doaj +1 more source
Sensors, 2019 We derived a closed-form expression of the maximum power transfer efficiency (MPTE) between a transmitting antenna inside the brain and a receiving antenna outside the head using spherical wave expansion. The derived expression was validated using a FEKO
Geonyeong Shin, Ick-Jae Yoon
doaj +1 more source
, 2017 We report constraints on the global $21$ cm signal due to neutral hydrogen at redshifts $14.8 \geq z \geq 6.5$. We derive our constraints from low foreground observations of the average sky brightness spectrum conducted with the EDGES High-Band ...
Bowman, Judd D. +3 more
core +1 more source
Nested Horn‐Based 3D‐Printed Dual‐Band High‐Gain Conical Beam Antenna
IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.The proposed antenna is committed to simultaneously possess dual‐band, high‐gain, wideband and conical beam performances. The design of the nested horn and the impedance change caused by the ridge waveguide can provide a simple and easy‐to‐implement idea for dual‐band wideband antenna design. Meanwhile, the loading of dual reflectors not only increases
Li Wu +4 more
wiley +1 more source
Journal of Communications Software and Systems, 2010 The radiation of RFID anti-theft gate system based on two parallel coaxial square loop antennas has been analyzed.The system was simulated in FEKO and near electric andmagnetic fields have been calculated.
Damir Senić +2 more
doaj
An effective methodology to design scale model for magnetic absorbing coatings based on ORL
Results in Physics, 2017 The scale measurement has a great significance in studying electromagnetic scattering properties. But there still exist great difficulties in constructing an accurate scale model including nonmetallic materials such as magnetic absorbing coatings.
Liming Yuan +5 more
doaj +1 more source