双极化超宽带馈电系统在VLBI全球观测系统中的应用

2016 Global Symposium on Millimeter Waves (GSMM) & ESA Workshop on Millimetre-Wave Technology and Applications Pub Date : 2016-06-06 DOI:10.1109/GSMM.2016.7500321

K. Abdalmalak, S. Romano, L. E. García Muñoz, Daniel Segovia Vargas

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引用次数: 1

摘要

提出了一种覆盖VLBI全球观测系统(VGOS)配置的新拓扑结构。VGOS的要求是一个覆盖2ghz到14ghz的馈电系统。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。为了实现双圆偏振，提出了一种四元阵列。文中还提出了一种适合于天线馈电和覆盖整个频带的平衡电路。模拟结果表明，各频率的辐射图具有很高的对称性，最大CP-XP电平大于15 dB，增益为10 dB。

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Dual polarized ultra wideband feed system for VLBI global observation system applications

A new topology covering the new VGOS (VLBI Global Observation System) configuration is presented. The VGOS's requirement is a feed system covering from 2 GHz to 14 GHz. The new receiver topology is based on a log-spiral antenna printed on a conical surface. To achieve the dual circular polarization, an array of four elements is proposed. A proper balun for feeding the antenna and covering the whole band is also presented. The simulated results of radiation patterns show a pretty high symmetry in the radiation patterns at all frequencies with a maximum CP-XP level greater than 15 dB with a 10 dB gain.

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2016 Global Symposium on Millimeter Waves (GSMM) & ESA Workshop on Millimetre-Wave Technology and Applications

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