Radio astronomy ultra wideband receiver covering the 2–14 GHz frequency band for VGOS applications

2016 10th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2016-04-10 DOI:10.1109/EUCAP.2016.7481889

K. Atia Abdalmalak, S. Romano, E. Garcia, A. Garcia Lamperez, Francisco Javier Herraiz Martinez, M. Salazar Palma, Daniel Segovia Vargas, José Manuel Serna Puente, F. Tercero, Jose Antonio Lopez Perez, F. Colomer, J. A. López Fernández

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引用次数: 6

Abstract

The requirements for the VGOS (VLBI Global Observation System) [1] are: feed system covering the 2 to 14 GHz bandwidth and also working with high efficiency (> 50%). Universidad Carlos III de Madrid has developed a new topology to cover them. The new receiver topology is based on a log-spiral antenna printed on a conical surface. Two interesting characteristics are presented: the first one is the dual circular polarization compared with the dual linear polarization recorded in the state of the art [2]. The other comes from the fact that the new topology uses the self-complementary antenna concept, so constant and almost real part of input impedance is obtained, simplifying the design of Low Noise Amplifier (LNA.) An array of four elements is presented for getting all the mentioned requirements. A single ended LNA covering the whole band is also presented together with the proper balun for feeding the antenna.

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射电天文学超宽带接收器，覆盖2-14 GHz频段，用于VGOS应用

对VLBI全球观测系统(VGOS)[1]的要求是:馈电系统覆盖2至14 GHz带宽，并且工作效率高(> 50%)。马德里卡洛斯三世大学开发了一种新的拓扑结构来覆盖它们。新的接收器拓扑结构是基于打印在圆锥表面上的对数螺旋天线。提出了两个有趣的特性:首先是双圆偏振与现有技术[2]中记录的双线偏振的比较。二是由于该拓扑采用了自互补天线的概念，使得输入阻抗恒定且几乎为实部，简化了低噪声放大器的设计。本文给出了一个包含四个元素的数组，用于获取上述所有需求。一个覆盖整个频带的单端LNA和适当的平衡馈电天线也被提出。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 10th European Conference on Antennas and Propagation (EuCAP)

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