|
|
|
|
|
Martynas Mila?evicius and Laurynas Maciulis
This paper presents a state-of-the-art overview of fine beam steering mechanisms for free-space optical communication on satellites. Precise beam pointing is a critical task for the successful operation of free-space optical communication systems. Based ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Fei Yang, Fan Xu, Chenxi Liu, Xinyu Yang, Ziqiang Wang, Junwei Wu and Xiaojian Fu
The proposed metasurface in the article can be used in millimeter wave sensing and 5G wireless communications.
|
|
|
|
|
|
|
|
|
|
|
Junhong Qian, Xiaoyan Wu, Hewei Liu, Xiubao Hua, Ye Tao and Rongzhu Zhang
In order to further explore the technical difficulties involved in orienting the sparse-aperture imaging system towards practical applications, this paper proposes an optical?mechanical structure design scheme and performance simulation, as well as actua...
ver más
|
|
|
|
|
|
|
|
|
|
|
Sungsik Wang, Hyunsoo Kim, Dongyoon Kim and Hosung Choo
This paper proposes a multi-band array antenna that shares a common aperture with heterogenous array elements. The multi-band array antenna includes one printed dipole antenna for the S-band and 3 × 3 array E-shaped patch antennas for the X-band. The cur...
ver más
|
|
|
|
|
|
|
|
|
|
|
Mario García de Blas, Morten Andreas Geday, Jose Manuel Otón and Xabier Quintana Arregui
Electrically tunable phase gratings are able to steer an incoming light beam without employing movable parts. Here, we present the design and implementation of a 2D beam steering device by cascading two orthogonal 1D liquid crystal (LC) based phase grati...
ver más
|
|
|
|
|
|
|
|
|
|
|
Simon Jekosch and Ennes Sarradj
Microphone arrays methods are useful for determining the location and magnitude of rotating acoustic sources. This work presents an approach to calculating a discrete directivity pattern of a rotating sound source using inverse microphone array methods. ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Alaa Nadim Salman,Shokri Almekdad,Mohamad Alhariri
Pág. 186 - 192
Successfully achieving the mission of the unmanned aerial vehicle (UAV) requiring a high gain data link between the UAV and the ground control station (GCS). The antenna of the ground station must has a narrow, precisely guided beam towards the UAV. Wide...
ver más
|
|
|
|
|
|
|
|
|
|
|
Giulio D'Amato,Gianfranco Avitabile,Giuseppe Coviello,Claudio Talarico
Pág. 18 - 26
This paper details the design and implementation of a modulator-less beam steering transmitter based on a revised DDS-PLL phase shifter architecture. The proposed topology targets low data rate communications for Internet-of-Things systems, and has been ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Andrew Mahre, Tian-You Yu, Robert D. Palmer and James M. Kurdzo
While the vertical structure of cold fronts has been studied using various methods, previous research has shown that traditional methods of observing meteorological phenomena (such as pencil-beam radars in PPI/volumetric mode) are not well-suited for res...
ver más
|
|
|
|
|
|
|
|
|
|
|
Luca Catarinucci,Sergio Guglielmi,Luca Mainetti,Vincenzo Mighali,Luigi Patrono,Maria Laura Stefanizzi,Luciano Tarricone
Pág. 117 - 127
Wireless Sensor Networks (WSNs) are receiving an ever increasing attention because they are one of the most important technologies enabling the Internet of Things vision. Since nodes of these networks are battery-powered, energy efficiency represents one...
ver más
|
|
|
|
|
|