Mark Bentum

Communication protocol for a satellite-swarm interferometer for low-frequency radio astronomy

Oliver Nagy, Manish Pandey, Georgios Exarchakos, Mark Bentum et autres

Orbiting low frequency antennas for radio astronomy (OLFAR) that capture cosmic signals in the frequency range below 80 MHz could provide valuable insights on our Universe. These wireless swarms of satellites form a connectivity graph that allows data exchange between most pairs …

nl, dk (code pays fourni par la source)

Communication protocol for a satellite-swarm interferometer for low-frequency radio astronomy

Oliver Nagy, Manish Pandey, G. Exarchakos, Mark Bentum et autres

Orbiting low frequency antennas for radio astronomy (OLFAR) that capture cosmic signals in the frequency range below 80 MHz could provide valuable insights on our Universe. These wireless swarms of satellites form a connectivity graph that allows data exchange between most pairs …

nl, dk (code pays fourni par la source)

Welcome to the 28th European Microwave Week in Utrecht, The Netherlands [Around the Globe]

Mark Bentum, Diego Caratelli, Marion K. Matters-Kammerer, Laura Anitori et autres

On behalf of the Organizing Committee, it is our great pleasure to invite you to the 28th edition of European Microwave Week (EuMW), which will take place on 21–26 September 2025 at a unique venue: the Royal Jaarbeurs in Utrecht, The Netherlands.

nl, it (code pays fourni par la source)

PHARA (PHased Array Radar for Atmospheric research) – designing the next generation of high-resolution weather radars for urban meteorology and hydrology

Alexander G. Yarovoy, Remko Uijlenhoet, H.W.J. Russchenberg, Fred van der Zwan et autres

As the hydrological cycle is accelerating due to climate change, metropolitan areas around the world are experiencing more intense rain storms ever more frequently and suffer from the floods they produce and their consequences for people and infrastructure. If we want to …

nl, us (code pays fourni par la source)

The Dark Ages Explorer (DEX): a filled-aperture ultra-long wavelength radio interferometer on the lunar far side

Christiaan D. Brinkerink, M. Arts, Mark Bentum, Albert‐Jan Boonstra et autres

The measurement of the spatial fluctuations of the neutral hydrogen 21 cm signal arising during the Dark Ages and Cosmic Dawn periods of our Universe (z from 200 to 10) holds the potential to resolve these still-unexplored earliest phases of the evolution …

Student-Led Tutorials Interactions and Learning in Electromagnetism

Cornelis J. C. Vertegaal, María Cecilia Martínez, Ramiro Serra, Prem Sundaramoorthy et autres

Contribution: This study identifies the types of interaction that contribute to student learning with student-led tutorials (SLTs). The quality of these interactions include peer discussion, student tutor presentation, joint reasoning, and constructive feedback.Background: The introduction of SLTs in an advanced electromagnetics bachelor …

nl, ar (code pays fourni par la source)

Building Blocks for the Dark Age Explorer (DEX): Enabling a Lunar Radio Telescope and Advancing Multi-Purpose Infrastructure for Sustainable Lunar Presence

Jasmina Lazendic-Galloway, Mark Bentum, Ulf Johannsen, Christiaan D. Brinkerink et autres

The deployment of a large radio telescope array on the Moon represents a transformative leap for both scientific discovery and technological innovation. The Dark-Ages EXplorer (DEX) concept envisions a large-scale, low-frequency radio array on the lunar surface, capable of conducting groundbreaking observations …

nl, fr (code pays fourni par la source)

Architecture Design and Ground Performance of Netherlands‐China Low‐Frequency Explorer

Sukanth Karapakula, Christiaan D. Brinkerink, A. Vecchio, Hamid Reza Pourshaghaghi et autres

Abstract The Netherlands‐China Low‐Frequency Explorer (NCLE) (Boonstra et al., 2017, https://www.ursi.org/proceedings/procGA17/papers/Paper_J19‐2(1603).pdf ; Chen et al., 2020, https://ui.adsabs.harvard.edu/abs/2020AAS…23610203C/abstract ) is a radio instrument for astrophysical studies in the low‐frequency range (80 kHz–80 MHz). As a technology demonstrator, NCLE shall inform the design of …

nl, fr, cn (code pays fourni par la source)

A 60-GHz Positive-Feedback-Based Transmitter Front-End with 22.8% PAEmax in 28-nm Bulk CMOS for Inter-Satellite Communications

Kaijie Ding, Dusan M. Milosevic, Vojkan Vidojković, Khaled Khalaf et autres

This paper presents a power and area efficient 60-GHz RF-beamforming transmitter front-end (TXFE) in 28-nm bulk CMOS for inter-satellite communications. It consists of a vector modulator (VM) for phase shifting and gain control, a driver, and a power amplifier (PA). By applying …

nl (code pays fourni par la source)

A 23-GHz TX/LNA Front-End Module for Inter-Satellite Links With 27.8% Peak Efficiency in the TX Path and 3.1-dB NF in the RX Path

Kaijie Ding, Vojkan Vidojković, Dusan Milosevic, Khaled Khalaf et autres

This article presents a 23-GHz transmitter/low-noise amplifier (TX/LNA) front-end module (FEM) in 130-nm SiGe BiCMOS for inter-satellite links (ISLs) in the system of orbiting low-frequency antenna array (OLFAR). The FEM consists of an LNA, a power amplifier (PA), a variable-gain amplifier (VGA), …

nl (code pays fourni par la source)

Active Antenna Design for Lunar-Based Detection of Global 21cm-Signals from the Dark Ages

Jordi C. F. Zandboer, David S. Prinsloo, Ulf Johannsen, Mark Bentum

This paper concerns the parameters, simulations and techniques involved in designing an active antenna system for detection of global 21cm-signals originating from the Dark Ages at the Lunar far side. A 10.5 m diameter equiangular spiral plate antenna is fashioned to operate …

nl (code pays fourni par la source)

Analysis of a Small LOFAR Low-Band Test Array Using a Sky Map, Simulated Embedded Element Patterns and Measured LNA-Impedances

M. Arts, M. Ruiter, P. P. Krüger, David S. Prinsloo et autres

This paper describes the analysis of a nine element test array of inverted V-antennas for the frequency range 20–90 MHz. The array is used as a small radio telescope. The purpose of this test array is to verify a system model using …

nl (code pays fourni par la source)