一种用于大地测量甚长基线干涉测量的三波段冷却接收机。

A Tri-Band Cooled Receiver for Geodetic VLBI.

作者信息

López-Pérez José A, Tercero-Martínez Félix, Serna-Puente José M, Vaquero-Jiménez Beatriz, Patino-Esteban María, García-Carreño Pablo, González-García Javier, García-Pérez Óscar, Beltrán-Martínez Francisco J, Albo-Castaño Carlos, Gallego-Puyol Juan D, López-Fernández Isaac, Díez-González Carmen, Malo-Gómez Inmaculada, Barbas-Calvo Laura, de Vicente-Abad Pablo, López-Fernández José A

机构信息

Yebes Observatory, Centro de Desarrollos Tecnológicos, Instituto Geográfico Nacional, Ministerio de Transportes, Movilidad y Agenda Urbana, Cerro de la Palera s.n., Yebes, E-19141 Guadalajara, Spain.

出版信息

Sensors (Basel). 2021 Apr 10;21(8):2662. doi: 10.3390/s21082662.

DOI:10.3390/s21082662

PMID:33920073

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8069004/

Abstract

This paper shows a simultaneous tri-band (S: 2.2-2.7 GHz, X: 7.5-9 GHz and Ka: 28-33 GHz) low-noise cryogenic receiver for geodetic Very Long Baseline Interferometry (geo-VLBI) which has been developed at Yebes Observatory laboratories in Spain. A special feature is that the whole receiver front-end is fully coolable down to cryogenic temperatures to minimize receiver noise. It was installed in the first radio telescope of the (RAEGE) project, which is located in Yebes Observatory, in the frame of the VLBI Global Observing System (VGOS). After this, the receiver was borrowed by the Norwegian Mapping Autorithy (NMA) for the commissioning of two VGOS radiotelescopes in Svalbard (Norway). A second identical receiver was built for the Ishioka VGOS station of the Geospatial Information Authority (GSI) of Japan, and a third one for the second RAEGE VGOS station, located in Santa María (Açores Archipelago, Portugal). The average receiver noise temperatures are 21, 23, and 25 Kelvin and the measured antenna efficiencies are 70%, 75%, and 60% in S-band, X-band, and Ka-band, respectively.

摘要

本文展示了一款用于大地测量甚长基线干涉测量（geo-VLBI）的同时三频段（S：2.2 - 2.7 GHz，X：7.5 - 9 GHz，Ka：28 - 33 GHz）低温低噪声接收机，该接收机由西班牙耶贝斯天文台实验室研制。其一个特殊之处在于，整个接收机前端可完全冷却至低温，以将接收机噪声降至最低。它被安装在位于耶贝斯天文台的（RAEGE）项目的第一台射电望远镜上，该项目属于甚长基线干涉测量全球观测系统（VGOS）。在此之后，该接收机被挪威测绘局（NMA）借用，用于调试位于斯瓦尔巴群岛（挪威）的两台VGOS射电望远镜。为日本地理空间信息局（GSI）的石冈VGOS站制造了第二台相同的接收机，为位于圣玛丽亚（葡萄牙亚速尔群岛）的第二个RAEGE VGOS站制造了第三台接收机。在S波段、X波段和Ka波段，接收机的平均噪声温度分别为21开尔文、23开尔文和25开尔文，测量得到的天线效率分别为70%、75%和60%。