Results 31 to 40 of about 899,302 (354)

Wideband Circularly Polarized Ellipse Antenna Array with Gain Enhancement

International Journal of Antennas and Propagation, 2018
In this paper, a wideband circularly polarized (CP) antenna element and array with gain enhancement are presented. The original antenna element adopts two orthogonal ellipse dipoles with end-loading pillars. In order to achieve a wide impedance bandwidth
Li Wang, Chang-liang Zhao, Rui Zhang, Xi Chen, Guang Fu, Xiao-wei Shi   +5 more
doaj   +1 more source

A Review of Synthesis Techniques for Phased Antenna Arrays in Wireless Communications and Remote Sensing

International Journal of Antennas and Propagation, 2021
Electronically controlled antenna arrays, such as reconfigurable and phased antenna arrays, are essential elements of high-frequency 5G communication hardware.
Stanislav Ogurtsov, Diego Caratelli, Zhe Song   +2 more
doaj   +1 more source

An Invariant Dual-beam Snowflake Antenna for Future 5G Communications [PDF]

, 2018
A broadband snowflake antenna for future 5G and millimeter-wave communications is presented. The proposed antenna has a size of 8 × 5 mm 2 . The antenna consists of a central hexagon surrounded by a series of symmetrically placed smaller hexagons around ...
Abbasi, Qammer H., Chattha, Hassan Tariq, Tahir, Farooq A., Ullah, Hidayat   +3 more
core   +1 more source

A Low-Profile Dielectric Resonator Antenna With Compact-Size and Wide Bandwidth by Using Metasurface

IEEE Access, 2021
A dielectric resonator antenna (DRA) with the loading of metasurface (MS) is proposed for low-profile, wide-bandwidth and compact-size. Firstly, an MS structure consisting of 6 × 6 periodic metallic patch cells is loaded above the DRA.
Shu-Kuan Zhao, Neng-Wu Liu, Qiang Chen, Guang Fu, Xin-Peng Chen   +4 more
doaj   +1 more source

UHF SATCOM broadband CP antenna: moxon type bent-dipoles over a ground plane [PDF]

, 2011
In this paper, we investigate and compare two different antenna types for UHF SATCOM applications; proposed Moxon type (bent dipole) and conventional egg beater (loop) antennas in terms of antenna performance and physical size. Bent dipole and egg beater
Niver, Edip, Tekin, İbrahim, Tekin, Ibrahim   +2 more
core  

Conformal Antenna Array for Millimeter-Wave Communications: Performance Evaluation

, 2015
In this paper, we study the influence of the radius of a cylindrical supporting structure on radiation properties of a conformal millimeter-wave antenna array.
Bisognin, A., Devillers, F., Ferrero, F., Kolmonen, V-M., Kyro, M., Luxey, C., Raisanen, A. V., Semkin, V.   +7 more
core   +1 more source

Predicting Chronicity in Children and Adolescents With Newly Diagnosed Immune Thrombocytopenia at the Timepoint of Diagnosis Using Machine Learning‐Based Approaches

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Objectives To identify predictors of chronic ITP (cITP) and to develop a model based on several machine learning (ML) methods to estimate the individual risk of chronicity at the timepoint of diagnosis. Methods We analyzed a longitudinal cohort of 944 children enrolled in the Intercontinental Cooperative immune thrombocytopenia (ITP) Study ...
Severin Kasser, Alice Bizeul, Meera Chitlur, Hugo Donato, Jelena Roganovic, Julia E. Vogt, Thomas Kühne   +6 more
wiley   +1 more source

Study on High Performance of MPI-Based Parallel FDTD from WorkStation to Super Computer Platform

International Journal of Antennas and Propagation, 2012
Parallel FDTD method is applied to analyze the electromagnetic problems of the electrically large targets on super computer. It is well known that the more the number of processors the less computing time consumed.
Z. L. He, K. Huang, Y. Zhang, Y. Yan, C. H. Liang   +4 more
doaj   +1 more source

Combined Single-Layer K-Band Transmitarray and Beamforming S-Band Antenna Array for Satcom

IEEE Open Journal of Antennas and Propagation, 2022
In this paper, a dual-band antenna at 4.5 GHz and 25 GHz is presented. The antenna is a low-frequency phased patch antenna array combined with a high-frequency transmitarray with a fixed beam.
Daniel Edelgaard Serup, Gert Frolund Pedersen, Shuai Zhang   +2 more
doaj   +1 more source

School of Electrical Engineering. [PDF]

, 1983
The possibility of making the antenna of an MST radar too large is pointed out. It is not that the signal ceases to become stronger beyond some critical antenna size; the received scattered signal actually becomes weaker as the antenna size is increased ...
Farley, D. T.
core   +1 more source