Results 11 to 20 of about 3,086,944 (261)

Polarization Enhancement of Microstrip Antennas by Asymmetric and Symmetric Grid Defected Ground Structures

IEEE Open Journal of Antennas and Propagation, 2020
A new approach to controlling cross-polarization (XP), for either suppressing XP or exciting circular polarization (CP), in single-fed microstrip antennas using novel grid defected ground structures (GDGSs) is proposed.
Yujie Zhang, Zixiang Han, Shanpu Shen, Chi-Yuk Chiu, Ross Murch   +4 more
doaj   +1 more source

A One-bit Transmit Phased Array with Spatial Excitation for Sub-6 GHz Wireless Systems

Известия высших учебных заведений России: Радиоэлектроника, 2022
Introduction. Due to the increasing number of users, growing rates of data transmission, and rapid advancement of the Internet of Things, the parameter of channel capacity is acquiring greater importance in modern communication systems.
V. V. Kirillov, I. V. Munina, P. A. Turalchuk   +2 more
doaj   +1 more source

Four Layer 2-4 Slot Metamaterial Based Cross Polarization Converter [PDF]

ITM Web of Conferences, 2023
Metamaterial was one of the major tool in the design of polarization conversion. Cross polarization converter was one of the important part of electromagnetic wave manipulation device.The metamaterial for the cross polarization converter was formed by ...
B. Arathy Krishnan, R. Pradeep
doaj   +1 more source

INTEGRAL EQUATIONS FOR MODELING CYLINDRICAL MIRROR ANTENNAS

Российский технологический журнал, 2017
The application of integral equations of magnetic field strength for simulating the radiation of multi-mirror antennas with cylindrical reflectors is considered in the article.
V. I. Nefedov, D. N. Trefilov, A. N. Dementiev, V. V. Vetrova, S. M. Kolesnikov, A. V. Shpak   +5 more
doaj   +1 more source

Ultrawideband, Wide Scanning Stripline-Fed Tightly Coupled Array Antenna Based on Parallel-Dipole Elements

Sensors, 2020
A stripline-fed tightly coupled array antenna with compact size, large scan volume and low cross-polarization characteristics is proposed for ultrawideband (UWB) applications.
Xiuye Liang, Weishuang Yin, Ang Chen, Zhe Zhang, Jianping Zeng, Lei Shi, Fang Guan, Xiaohan Liu, Jian Zi   +8 more
doaj   +1 more source

A Wind Speed Retrieval Model for Sentinel-1A EW Mode Cross-Polarization Images

Remote Sensing, 2019
In contrast to co-polarization (VV or HH) synthetic aperture radar (SAR) images, cross-polarization (CP for VH or HV) SAR images can be used to retrieve sea surface wind speeds larger than 20 m/s without knowing the wind directions.
Yuan Gao, Changlong Guan, Jian Sun, Lian Xie   +3 more
doaj   +1 more source

The MIMO Antenna Array with Mutual Coupling Reduction and Cross-polarization Suppression by Defected Ground Structures [PDF]

Radioengineering, 2018
This paper proposes two types of defected ground structures (DGSs) for achieving the mutual coupling (MC) reduction and the antenna cross-polarization (XP) suppression respectively in a MIMO (multiple input multiple output) wireless communication system.
Z. L. Zhang, K. Wei, J. Xie, J. Y. Li, L. Wang   +4 more
doaj  

Boosting Dissolution-Dynamic Nuclear Polarization by Multiple-Step Dipolar Order Mediated 1H->13C Cross-Polarization

, 2021
Dissolution-dynamic nuclear polarization can be boosted by employing multiplecontact cross-polarization techniques to transfer polarization from 1H to 13C spins.
Samuel, Cousin, Morgan, Ceillier, Quentin, Chappuis, Sami, Jannin, Venita, Decker, Olivier, Cala, Stuart J., Elliott   +6 more
core   +1 more source

Influence of crosspolarization of dual-polarized antenna elements on the ergodic capacity of a multichannel system

Физика волновых процессов и радиотехнические системы
Background. Antenna arrays based on dual-polarization elements are used as radiating devices for modern and perspective radio communication systems. The main factor reducing the effectiveness of this approach is the presence of spatial correlation and ...
Ekaterina V. Averina, Ksenia V. Smuseva, Pavel A. Tokarev, Grigory K. Uskov   +3 more
doaj   +3 more sources

Self-Isolation in MIMO Array Using Mode Diversity

IEEE Access
A new isolation technique is proposed for multiple-input multiple-output (MIMO) microstrip patch antenna (MPA) arrays utilizing mode diversity. Typically, similar modes are excited in each element of the MIMO array.
Manzoor Elahi, Slawomir Koziel, Leifur Leifsson   +2 more
doaj   +1 more source