Results 21 to 30 of about 3,891 (267)

Antenna array with switching scanning in elevation plane

Физика волновых процессов и радиотехнические системы, 2021
It is known that the most reliable communication in hard-to-reach places such as the Arctic, Tundra, Taiga is satellite communication [1-5]. Therefore, for satellite communications, it is necessary to develop your own antenna arrays.
Yuri G. Pasternak, Vladimir A. Pendyurin, Kirill S. Safonov   +2 more
doaj   +1 more source

High-throughput SatCom-on-the-move antennas: Technical overview and state-of-the-art

Digital Communications and Networks
With the rapid development of satellite communications, satellite antennas attract growing interest, especially the high-throughput SatCom-on-the-move antenna for providing high-speed connectivity in a mobile environment.
Yuanzhi He, Fan Yang, Guodong Han, Yuanyuan Li   +3 more
doaj   +1 more source

Compact folded‐shorted patch array offering dual‐band operation and dual‐circularly polarized radiation for picosatellites and other small satellites

Electronics Letters, 2023
The development of a dual‐band folded shorted patch (FSP) antenna array is presented which offers dual‐circularly polarized radiation. Applications include small satellites like CubeSats and picosatellites. The proposed 2 × 2 FSP array design operates at
Bandar Alshammari, Khalid M. Alrushud, Yuepei Li, Symon K. Podilchak   +3 more
doaj   +1 more source

Design of a Wrapped Rib Mesh Reflector Antenna With a Precise Parabolic Surface and High Volume-Reduction Efficiency Using a Lightweight and Simple Mechanical Configuration

IEEE Access
In this paper, we propose a wrapped rib mesh reflector antenna with spring hinges and column stoppers for a high precision reflector surface. To achieve a high precision surface, twelve spring hinges and column stoppers are employed on the center hub ...
En-Yeal Yim, Changhyeon Im, Hosung Choo
doaj   +1 more source

Design and Fabrication of Planar Sub-Array for Satellite Data Transmission Directive Conformal Array Antenna [PDF]

فصلنامه علوم و فناوری فضایی
High-gain antennas are crucial for ensuring stable communication in imaging and remote sensing satellites due to their ability to support high data transmission rates while compensating for the limitations associated with increasing transmitter power or ...
Arian Zakiani, Seyyed Hasan Sedighy, Razieh Narimani   +2 more
doaj   +1 more source

Antennas for Satellite Communication

Journal of Advance Research in Electrical & Electronics Engineering (ISSN: 2208-2395), 2014
Satellite communication antenna in unvield .It also comprises of transmitting/ receiving signal section and transmission of signal to satellite . it consist of various types of antennas used in satellite communication such as UHF, L/s band ,c-band, ku-band , k-band antennas.
Viplav Yadav, null Sandeep, Sanjay Sharma   +2 more
openaire   +2 more sources

Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan, Rhena Wulf, Till M. J. Stadtmüller, Christos G. Aneziris, Tobias M. Fieback   +4 more
wiley   +1 more source

Design and Fabrication of a dual-polar reflector array antenna for satellite applications [PDF]

فصلنامه علوم و فناوری فضایی, 2020
This paper presents a new unit to design dual linearly polarized reflectarray antenna at ku for satellite telecommunication. Two orthogonal sets of parallel dipoles are used for each polarization to achieve more degree of freedom in the design and wider ...
Alireza HeshmatiMoez, S. Hassan Sedighi, Mohamad Soleimani, Mohamad Khalaj AmirHoseini   +3 more
doaj   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

On‐Demand Activation of Thin Alginate Shell Encapsulated Volatile Liquid for Untethered Pneumatic Soft Actuation

Advanced Engineering Materials, EarlyView.
Phase‐changing liquids enable untethered pneumatic actuation in soft robotics but suffer from volatility and storage challenges. This work reports a simple method to encapsulate Novec 7000 within micron‐thin alginate shells via in situ injection and ionic crosslinking.
Rayan A. M. Basodan, Jack Keddie, Byoungyoul Park, Hyun‐Joong Chung   +3 more
wiley   +1 more source