Results 31 to 40 of about 75,188 (269)

Balanced‐to‐unbalanced and balanced‐to‐balanced filtering rat‐race couplers using multilayer substate integrated waveguide cavities

IET Microwaves, Antennas & Propagation, 2021
This study reports a class of balanced‐to‐unbalanced (BTU) and balanced‐to‐balanced (BTB) filtering rat‐race couplers (FRCs) based on multilayer substrate integrated waveguide (SIW) cavities.
Xian Wang, Dongfang Zhou, Dewei Zhang, Yue Wang, Dalong Lv, Yi Zhang   +5 more
doaj   +1 more source

A Design Framework for Beamforming Integrated Circuits Operating at Mm-Wave Frequencies

IEEE Access, 2021
In order to cope with the needs of fifth-generation (5G) cellular networks and beyond, phased-array antenna systems operating at millimeter-wave (mm-wave) frequencies will be required. This makes the system design very complex. In order to create insight
Guilherme Theis, Zhe Song, Gabriele Federico, Diego Caratelli, A. Bart Smolders   +4 more
doaj   +1 more source

A New Wideband Mutual Coupling Compensation Method for Adaptive Arrays Based on Element Pattern Reconstruction

International Journal of Antennas and Propagation, 2014
A new mutual coupling compensation method for wideband adaptive arrays is proposed. The new method is developed by combining the element pattern reconstruction method and the system identification method.
Qiulin Huang, Feng Wei, Lihua Yuan, Hongxing Zhou, Xiaowei Shi   +4 more
doaj   +1 more source

Broadband CP crossed‐stepped‐dipole antenna incorporating a cross slotted square patch

IET Microwaves, Antennas & Propagation, 2019
A simple broadband circularly polarised (CP) crossed‐dipole antenna is proposed. The antenna is composed of two crossed‐strip dipoles with two stepped sections, which are connected by vacant‐quarter rings to realise CP radiation, and a parasitic cross ...
Guirong Feng, Lei Chen, Xingsi Xue, Na Li, Xiaowei Shi   +4 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

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

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

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

FEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson, Tomáš Gedeon, Mauricio Garcia Benitez, Campbell Putnam, William R. Harcombe, Radhakrishnan Mahadevan, Ashley E. Beck   +6 more
wiley   +1 more source

AscF in the mycobacterial CIII–CIV supercomplex lacks metal and nucleotide binding but links malate oxidation to respiration

FEBS Letters, EarlyView.
The mycobacterial CIII‐CIV respiratory supercomplex is an obligate assembly, encompassing several subunits of unknown functions. We have characterized the intracellular subunit AscF, and show that it is unlikely to be a sensor for metals or nucleotides, but is required for growth on nonfermentable energy sources, and likely works as an adapter for ...
Eni Rile, Riccardo Diamanti, Daniel Lundin, Soni Sharma, Robin Lissner, Coenraad P. Kuil, Martin Högbom, Dirk Bald, Dan Sjöstrand   +8 more
wiley   +1 more source

A Novel Resource Allocation Scheme in NOMA-Based Cellular Network with D2D Communications

Future Internet, 2020
Non-orthogonal multiple access (NOMA) has become a promising technology for 5G. With the support of effective resource allocation algorithms, it can improve the spectrum resource utilization and system throughput.
Jingpu Wang, Xin Song, Yatao Ma
doaj   +1 more source