P. Benthem

Netherlands Institute for Radio Astronomy

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

J.G. Bij de Vaate

Netherlands Institute for Radio Astronomy

Stefan J. Wijnholds

AstroTec Holding (Netherlands)

Adrian Sutinjo

International Centre for Radio Astronomy Research

Jader Monari

National Institute for Astrophysics

G. Pupillo

Istituto di Radioastronomia di Bologna

Riccardo Chiello

University of Oxford

T. Booler

Curtin University

Federico Perini

National Institute for Astrophysics

M. Sokołowski

Curtin University

R. B. Wayth

International Centre for Radio Astronomy Research

Cooperative Institutions

Netherlands Institute for Radio Astronomy

117

AstroTec Holding (Netherlands)

International Centre for Radio Astronomy Research

Curtin University

National Institute for Astrophysics

University of Groningen

Istituto di Radioastronomia di Bologna

Astronomy and Space

Arcetri Astrophysical Observatory

Institute of Radio Astronomy

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

On the front-end design of mid-frequency aperture array for square kilometre array

Experimental Astronomy (2018)

Yongwei Zhang Ahmed El‐Makadema Eloy de Lera Acedo P. Benthem S. Barth

Complementary to the conventional dish radio telescopes, aperture arrays provide a technically attractive approach to achieve a large field of view and flexibility in observational parameters e.g. Sky area vs. bandwidth. Designs of both aperture array elements and overall geometry for the SKA Mid Frequency Aperture Array are presented here, together with resulting trade-offs. The paper reports the latest developments of global efforts on the front-end design of Mid-Frequency Aperture Array, not attempting to make technology selections, as the priority of sciences and the time for implementing Mid-Frequency Aperture Array is yet to be fully confirmed. Different on-going front-end solutions are introduced, particularly crossed ring antenna array with a planar structure is explored in more detail as it is less known in the community. Key performances of the candidate front-end technologies are addressed by examining the prototypes. The objective of the collaborative study is to increase technology readiness for implementation of Mid-Frequency Aperture Array in the future.

Aperture (computer memory)

Planar array

Radio Astronomy

10.1007/s10686-018-9608-z

Cite

Citations (7)

Aperture array verification system 1: Overview of a square kilometre array prototype

2022 International Conference on Electromagnetics in Advanced Applications (ICEAA) (2016)

Peter J. Hall P. Benthem Adrian Sutinjo

Aperture Array Verification System 1 (AAVS1) is a prototype and verification platform for SKA-Low, the low-frequency component of the international Square Kilometre Array (SKA) radio telescope to be built at the remote, radio-quiet Murchison Radio-astronomy Observatory (MRO) in Western Australia. The 400-antenna AAVS1 is a sparse aperture array which will be built and characterized in 2016-17. It is the primary Critical Design Review demonstrator for SKA-Low and is an undertaking by the seven-member Aperture Array Design and Construction Consortium. AAVS1 is hosted at the MRO by the Murchison Widefield Array (MWA) radio telescope, the first operational SKA precursor telescope. This paper introduces the AAVS1 instrument and outlines its use in both stand-alone and MWA-adjunct modes.

Kilometer

Square (algebra)

Aperture (computer memory)

10.1109/iceaa.2016.7731394

Cite

Citations (7)

Radio observatories and instrumentation used in space weather science and operations

Journal of Space Weather and Space Climate (2020)

Eoin Carley Carla Baldovin P. Benthem M. M. Bisi R. A. Fallows

The low frequency array (LOFAR) is a phased array interferometer currently consisting of 13 international stations across Europe and 38 stations surrounding a central hub in the Netherlands. The instrument operates in the frequency range of ~10–240 MHz and is used for a variety of astrophysical science cases. While it is not heliophysics or space weather dedicated, a new project entitled “LOFAR for Space Weather” (LOFAR4SW) aims at designing a system upgrade to allow the entire array to observe the Sun, heliosphere, Earth’s ionosphere, and Jupiter throughout its observing window. This will allow the instrument to operate as a space weather observing platform, facilitating both space weather science and operations. Part of this design study aims to survey the existing space weather infrastructure operating at radio frequencies and show how LOFAR4SW can advance the current state-of-the-art in this field. In this paper, we survey radio instrumentation and facilities that currently operate in space weather science and/or operations, including instruments involved in solar, heliospheric, and ionospheric studies. We furthermore include an overview of the major space weather service providers in operation today and the current state-of-the-art in the radio data they use and provide routinely. The aim is to compare LOFAR4SW to the existing radio research infrastructure in space weather and show how it may advance both space weather science and operations in the radio domain in the near future.

LOFAR

Space Weather

Heliosphere

space science

International Space Station

Instrumentation

10.1051/swsc/2020007

Cite

Citations (43)

Expanding the field of view: Design considerations for a sparse-regular FFT SKA radio telescope

2022 16th European Conference on Antennas and Propagation (EuCAP) (2017)

J.G. Bij de Vaate David Davidson P. Benthem

This paper proposes a system approach to explore the full potential of phased arrays with sparse, regular spacing for radio astronomy. In particular, the FFT telescope is revisited, with its tantalising promise of instantaneous (nearly) all sky observations.

Radio Astronomy

10.23919/eucap.2017.7928226

Cite

Citations (2)

Mid frequency aperture array technology developments for the SKA

J.G. Bij de Vaate P. Benthem R.H. Witvers R. van den Brink Yongwei Zhang

This paper describes the technology developments of antenna arrays for the mid frequency instrument of the Square Kilometre Array radio telescope.

Radio Astronomy

Aperture (computer memory)

10.1109/antem.2014.6887666

Cite

Citations (1)

Apertif, Phased Array Feeds for the Westerbork Synthesis Radio Telescope

arXiv (Cornell University) (2021)

Wiggert A. van Cappellen Tom Oosterloo Marc Verheijen Elizabeth A. K. Adams B. Adebahr

We describe the APERture Tile In Focus (Apertif) system, a phased array feed (PAF) upgrade of the Westerbork Synthesis Radio Telescope which has transformed this telescope into a high-sensitivity, wide field-of-view L-band imaging and transient survey instrument. Using novel PAF technology, up to 40 partially overlapping beams can be formed on the sky simultaneously, significantly increasing the survey speed of the telescope. With this upgraded instrument, an imaging survey covering an area of 2300 deg2 is being performed which will deliver both continuum and spectral line data sets, of which the first data has been publicly released. In addition, a time domain transient and pulsar survey covering 15,000 deg2 is in progress. An overview of the Apertif science drivers, hardware and software of the upgraded telescope is presented, along with its key performance characteristics.

Upgrade

Transient (computer programming)

Radio Astronomy

Aperture (computer memory)

First light

Source

Cite

Citations (1)

The low frequency receivers for SKA 1-low: Design and verification

P. Benthem Marchei Gerbers J.G. Bij de Vaate Stefan Wynholds J. E. Bast

The initial phase of the Square Kilometre Array (SKA) [1] is represented by a ~10% instrument and construction should start in 2018. SKA 1-Low, a sparse Aperture Array (AA) covering the frequency range 50 to 350 MHz, will be part of this. This instrument will consist of 512 stations, each hosting 256 antennas creating a total of 131,072 antennas. A first verification system towards SKA 1-Low, Aperture Array Verification System 1 (AAVSl), is being deployed and validated in 2017.

Aperture (computer memory)

Square (algebra)

10.23919/ursigass.2017.8104992

Cite

Citations (6)

LOFAR For Space Weather (LOFAR4SW): Increasing European Space-Weather Capability with Europe's Largest Radio Telescope

Solar Heliospheric and INterplanetary Environment (SHINE 2018) (2018)

M. M. Bisi René Vermeulen R. A. Fallows P. Benthem Nicole Vilmer

Space Weather

LOFAR

Source

Cite

Citations (0)

Improved sensitivity of a low noise aperture array tile for the SKA

2022 International Conference on Electromagnetics in Advanced Applications (ICEAA) (2014)

E. E. M. Woestenburg R.H. Witvers M. Ruiter P. Benthem

Aperture array technology is one of the candidate technologies for the 500 MHz to 1500 MHz frequency range of the SKA. The feasibility and low noise potential of aperture arrays have been demonstrated with small test systems before, e.g. with a 50 K system noise temperature, measured on a 1 m ² prototype tile in 2010. However, further reduction of the array noise temperature is essential to optimize the ratio of effective collecting area and system noise temperature. This is made possible by applying new, lower noise, technology to the LNA design. Thus the sensitivity requirement for the Mid Frequency Aperture Array of the SKA could be satisfied at lower cost. Results of a step by step approach to reduce the system noise temperature to below 40 K, giving at least 20% improvement, are presented.

Aperture (computer memory)

Noise temperature

10.1109/iceaa.2014.6903844

Cite

Citations (9)

The Aperture Array Verification System 1: System overview and early commissioning results.

arXiv (Cornell University) (2021)

P. Benthem R. B. Wayth Eloy de Lera Acedo Kristian Zarb Adami M. Alderighi

The design and development process for the Square Kilometre Array (SKA) radio telescope, the Low Frequency Aperture Array component, was progressed during the SKA pre-construction phase by an international consortium, with the goal of meeting requirements for a critical design review. As part of the development process a full-sized prototype SKA Low station was deployed, the Aperture Array Verification System 1 (AAVS1). We provide a system overview and describe the commissioning results of AAVS1, which is a low frequency radio telescope with 256 dual-polarisation log-periodic dipole antennas working as a phased array. A detailed system description is provided, including an in-depth overview of relevant sub-systems, ranging from hardware, firmware, software, calibration,and control sub-systems. Early commissioning results cover initial bootstrapping, array calibration, stability testing, beam-forming,and on-sky sensitivity validation. Lessons learned are presented, along with future developments.

Firmware

Aperture (computer memory)

Installation

Source

Cite

Citations (0)