Ultra-wideband receiver technology development for radio astronomical large aperture telescope

Abstract

Xinjiang 110 m radio telescope (QiTai Telescope, QTT) will play an important role in the field of fundamental science, such as gravitational wave detection, black holes, star formation and galaxy origin, and also be applied to deep space explorations, for example, Lunar Exploration Program and Exploration of Mars and Venus. However, many ultra-wideband, multi-beam receivers will be applied for various science goals of QTT, and we will be faced with numerous significant challenges. In this paper, we have presented the technical progress of ultra-wideband receiver for large aperture telescope, including the ultra-wideband feeds/Ortho-Mode Transducer (OMT), Low Noise Amplifier (LNA) and multi-beam receiver. Meanwhile, key techniques and challenges were analyzed for receiver research and fabrication. Based on the science requirements and the technique development, we have proposed the preliminary scheme for QTT receiver system, and discussed about the feed forms, primary devices research and key coming difficulties and challenges.