A High-Temperature Superconducting Wideband Bandpass Filter at the L Band for Radio Astronomy  

作　　者：Xinyu Zhu Jianbin Li Boyu Lu Bin Wei Yifan Jiang Linan Jiang Chao Hu 

机构地区：[1]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]State Key Laboratory of Low-Dimensional Quantum Physics,Department of Physics,Tsinghua University,Beijing 100084,China

出　　处：《Research in Astronomy and Astrophysics》2023年第11期25-30,共6页天文和天体物理学研究（英文版）

基　　金：supported by the Science and Technology Project of Tibet Autonomous under grant XZ201901-GB-21;the National Natural Science Foundation of China under grant11073027;the Science and Technology Research and Development Program Project of China National Railway Group under grant P2021G011。

摘　　要：In order to ensure the normal operation of radio astronomy observations,an extremely sensitive receiver system needs to be equipped in front of the large radio telescope.An 8-pole wideband high-temperature superconducting(HTS)filter using a Coplanar Spiral Resonator Structure with a passband of 1160~1670 MHz is developed to suppress strong radio interference.The filter is fabricated on a 36 mm×14 mm YBCO HTS film,which is deposited on a 0.5 mm thick MgO substrate.The minimum insertion loss measured in the liquid nitrogen temperature region is 0.03 dB,and the first parasitic passband appears at 2600 MHz.The measured results are in good agreement with the simulations.The filter can be used in radio telescope receivers for the observation of neutral hydrogen and pulsars,as well as in high-sensitivity satellite navigation instruments.

关 键 词：instrumentation:detectors techniques:radar astronomy telescopes 

分 类 号：P161[天文地球—天文学]