Results 1 to 10 of about 3,891 (267)

Adaptive Switching Strategy of an Aerial Drone’s GNSS Antennas with Metallic Shielding for GNSS Anti-Jamming [PDF]

open access: yesSensors
This paper presents a simple and cost-effective anti-jamming method for global navigation satellite system (GNSS) antennas of an aerial drone. The drone has three GNSS antennas, such that two antennas exist at distinct heights inside a metallic shielding
Seojin Bang, Jonghoek Kim
doaj   +2 more sources

The Multi-Objective Optimization of a Dual C-Type Gold Ribbon Interconnect Structure Considering Its Geometrical Parameter Fluctuation [PDF]

open access: yesMicromachines
With the increasing demand for high integration, low cost, and large capacities in satellite systems, integrating the antenna and microwave component into the same system has become appealing to the satellite engineer.
Guangmi Li   +9 more
doaj   +2 more sources

A Review of Multibeam Phased Array Antennas as LEO Satellite Constellation Ground Station

open access: yesIEEE Access, 2021
Small satellites in low Earth orbit (LEO) are typically organized as a satellite constellation. The satellite number of a LEO satellite constellation would be several hundred or even tens of thousands to realize a fully global coverage.
Guolong He   +3 more
doaj   +1 more source

Gain Pattern Reconstruction of GPS Satellite Antennas Using a Global Receiver Network

open access: yesNavigation, 2022
For GNSS signal power monitoring systems, the characterization of satellite antennas plays an important role. Recently, gain pattern reconstructions of Galileo satellite antennas have been obtained using single-station observations.
Gerardo Allende-Alba   +2 more
doaj   +1 more source

Analysis of Grating Lobe Effects on GEO DSC Distributed Antennas

open access: yesApplied Sciences, 2023
Traditional single-antenna systems have inherent limitations in terms of antenna gain, anti-interference capability, and flexibility. To overcome these challenges, satellite-mounted distributed antenna systems disperse multiple antennas at different ...
Changxu Wang, Yuanzhi He, Chengwu Qi
doaj   +1 more source

VHF/UHF Ultrawideband Tightly Coupled Dipole Array for CubeSats

open access: yesIEEE Open Journal of Antennas and Propagation, 2021
To date, CubeSat radars and imagers have been limited to operations beyond S-band due to the challenges associated with the design of wideband, compact, low-frequency antennas.
Vignesh Manohar   +3 more
doaj   +1 more source

Design of planar four-antenna system for single soldier handheld terminal

open access: yesDianzi Jishu Yingyong, 2021
The planar integration design of the antenna system for soldier terminals is presented in this paper based on the requirements of the miniaturization and high integration. A four-antenna system including recieving and transmitting Ad-Hoc network antennas,
Zhou Wenhui
doaj   +1 more source

Detecting Ships in the New Zealand Exclusive Economic Zone: Requirements for a Dedicated SmallSat SAR Mission

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
The performance tradeoffs of a smallsat synthetic aperture radar (SAR) system for maritime surveillance in the coastal waters of New Zealand are investigated.
Jan Krecke   +5 more
doaj   +1 more source

Packable and Readily Deployable Tightly Coupled Dipole Array (TCDA) With Integrated Planar Balun

open access: yesIEEE Open Journal of Antennas and Propagation, 2022
To overcome the limited payload dedicated to onboard antennas for CubeSat/SmallSat applications, this paper presents a novel, foldable, dual-polarized Tightly Coupled Dipole Array (TCDA).
Md Rakibul Islam   +3 more
doaj   +1 more source

Precise water level measurements using low-cost GNSS antenna arrays [PDF]

open access: yesEarth Surface Dynamics, 2021
We have developed a ground-based Global Navigation Satellite System Reflectometry (GNSS-R) technique for monitoring water levels with a comparable precision to standard tide gauges (e.g.
D. J. Purnell   +4 more
doaj   +1 more source

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