Initial results obtained with the first TWIN VLBI radio telescope at the Geodetic Observatory Wettzell

T Schüler, G Kronschnabl, C Plötz, A Neidhardt… - Sensors, 2015 - mdpi.com
Geodetic Very Long Baseline Interferometry (VLBI) uses radio telescopes as sensor
networks to determine Earth orientation parameters and baseline vectors between the …

Multi-band Radio Astronomy Receivers: A Concept Exploration

T Stander, A de Witt, DIL de Villiers… - 2024 International …, 2024 - ieeexplore.ieee.org
Concurrent multi-band observations are a cornerstone of future radio astronomy and very-
long baseline interferometry (VLBI). While some telescopes can incorporate multiple …

A dual-band reflector feed in coaxial configuration for satellite communication [antenna applications corner]

R Galuscak, M Mazanek, P Hazdra… - IEEE Antennas and …, 2018 - ieeexplore.ieee.org
This article presents the design, simulations, and measured results of a dual-band coaxial
feed for satellite communication in the 2.4 and 10.45 GHz bands. The feed is designed for …

Ring-loaded coaxial groove horn antenna for 12/14/20/30 GHz bands

S Ito, F Nakatani, H Nanno, H Deguchi… - … on Antennas and …, 2022 - ieeexplore.ieee.org
In order to achieve rotationally symmetric beam, low cross-polarization component, and
small size in a wide frequency band, a new quad-band horn is proposed in this paper by …

Multi-Band 7.1/8.5/20/30-GHz Horn Antenna with Spline-Taper and Coaxial-Groove Walls

H Nanno, H Nishida, H Deguchi… - 2024 IEEE International …, 2024 - ieeexplore.ieee.org
This paper proposes a new horn antenna with a coaxial-groove structure using a spline-
taper with small protrusion four bands of 7.1/8.5/20/30 GHz. This horn has a good VSWR …

Optimization of the Quad-Ridged Horn for the geodetic VGOS station of the Yebes Observatory

F Tercero, O García-Perez, JM Serna… - … on Antennas and …, 2018 - ieeexplore.ieee.org
The next generation Very Long Baseline Interferometry (VLBI) radio telescope sited at the
Yebes Observatory is a fully operative 13.2 m ring-focus reflector covering the frequency …

S/Ka-Band Shared Aperture Antenna System for Data Relay Satellites and Ground Station Applications

RK Nandwani, SK Prasad, SS Kumar… - 2023 IEEE Wireless …, 2023 - ieeexplore.ieee.org
Antenna systems operating in widely separated dual/triple bands are becoming common
requirements owing to various complex mission requirements. In this work, a Dual CP, Dual …

Circular Horn Antenna with Ring and Coaxial Grooves for Dual Band

A Takada, S Ito, H Deguchi… - 2021 IEEE International …, 2021 - ieeexplore.ieee.org
This paper proposes a new dual-band horn consisting of a tapered section, coaxial grooves
section, and a ring projection installed between both sections in order to achieve rotationally …

[PDF][PDF] IGN Yebes technology development center

JA López–Fernández, F Colomer… - … VLBI Service for …, 2014 - ivscc.gsfc.nasa.gov
IGN Yebes Technology Development Center Page 1 IGN Yebes Technology Development
Center José Antonio López–Fernández, José Antonio López–Pérez, Pablo de Vicente …

[PDF][PDF] Results from the TWIN Commissioning Phase

T Schüler, G Kronschnabl, A Neidhardt, C Plötz… - EVGA meeting in Ponta …, 2015 - oan.es
The TWIN radio telescope pair at the Geodetic Observatory Wettzell features two identical
antenna constructions reserved for geodetic VLBI within the International VLBI Service for …