Precise radio astrometry and new developments for the next generation of instruments
MJ Rioja, R Dodson - The Astronomy and Astrophysics Review, 2020 - Springer
We present a technique-led review of the progression of precise radio astrometry, from the
first demonstrations, half a century ago, until to date and into the future. We cover the …
first demonstrations, half a century ago, until to date and into the future. We cover the …
The NANOGrav program for gravitational waves and fundamental physics
A Brazier, S Chatterjee, T Cohen, JM Cordes… - arXiv preprint arXiv …, 2019 - arxiv.org
arXiv:1908.05356v2 [astro-ph.IM] 16 Aug 2019 Page 1 Astro2020 Project White Paper The
NANOGrav Program for Gravitational Waves and Fundamental Physics The North American …
NANOGrav Program for Gravitational Waves and Fundamental Physics The North American …
Ultrawideband conical log-spiral circularly polarized feed for radio astronomy
KA Abdalmalak, GS Botello… - … on Antennas and …, 2019 - ieeexplore.ieee.org
In order to meet the requirements of the new generation of radio telescopes, we have
developed a new topology called DYQSA, which stands for DYson Quad-Spiral Array. The …
developed a new topology called DYQSA, which stands for DYson Quad-Spiral Array. The …
Dielectrically loaded quad-ridge flared horn for beamwidth control over decade bandwidth—optimization, manufacture, and measurement
J Flygare, M Pantaleev - IEEE Transactions on Antennas and …, 2019 - ieeexplore.ieee.org
We present the design, manufacture, and measured performance of a dielectrically loaded
quad-ridge flared horn (QRFH) feed for decade bandwidth radio astronomy application. The …
quad-ridge flared horn (QRFH) feed for decade bandwidth radio astronomy application. The …
Beyond-Decade Ultrawideband Quad-Ridge Flared Horn With Dielectric Load From 1 to 20 GHz
In this article, we present a novel dielectrically loaded quad-ridge flared horn (QRFH) as a
reflector feed with beyond-decade ultrawideband performance. The dielectric is machined in …
reflector feed with beyond-decade ultrawideband performance. The dielectric is machined in …
Elimination of Anomalous Resonances in Coaxial-fed LPDA and Its Array with Integrated Φ-shaped Balun
H Qi - IEEE Transactions on Antennas and Propagation, 2023 - ieeexplore.ieee.org
In this communication, the concept of common-mode (CM) resonance is introduced to
analyze radiation anomalies caused by unbalanced coaxial feeding. To address this issue …
analyze radiation anomalies caused by unbalanced coaxial feeding. To address this issue …
Longitudinally miniaturized H-plane horn antenna with− 30 dB sidelobes realized by simple blocks redistributing the aperture field
JY Deng, RQ Luo, W Lin, Y Zhang… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
A longitudinally miniaturized H-plane horn antenna with suppressed sidelobes by
redistributing the field on the radiating aperture is proposed by loading a few rectangular …
redistributing the field on the radiating aperture is proposed by loading a few rectangular …
An ultrawideband nested coaxial waveguide feed antenna for radio astronomy
X Du, T Johnson, T Landecker… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
We describe a new type of ultrawideband feed antenna based on nested coaxial
waveguides. The feed is for radio astronomy applications and covers two closely spaced …
waveguides. The feed is for radio astronomy applications and covers two closely spaced …
[图书][B] Dielectrically Loaded Quad-ridge Flared Horns for Ultra Wideband Reflector Feed Applications in Radio Astronomy
J Flygare - 2022 - search.proquest.com
Reflector-based radio telescopes are used as tools for observations in both radio astronomy
and space geodesy. To observe the weak sources in space, highly sensitive receivers …
and space geodesy. To observe the weak sources in space, highly sensitive receivers …
BRAND: Ultra-Wideband Feed Development for the European VLBI Network-A Dielectrically Loaded Decade Bandwidth Quad-Ridge Flared Horn
We present the design of an ultra-wideband dielectrically loaded Quad-Ridge Flared Horn
(QRFH) feed for the European Very Long Baseline Interferometry Network (EVN) developed …
(QRFH) feed for the European Very Long Baseline Interferometry Network (EVN) developed …