Digital Beamforming Demonstration of a Microstrip Antenna Phased Array Feeds(PAF)at 1.25 GHz  

作　　者：Peng Wu Mao-Zheng Chen Jian Li Kai Wang Liang Cao Han Yu 仵鹏;陈卯蒸;李健;王凯;曹亮;于涵(Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China;University of Chinese Academy of Sciences,Beijing 100049,China;Xinjiang Key Laboratory of Microwave Technology,Urumqi 830011,China)

机构地区：[1]Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Xinjiang Key Laboratory of Microwave Technology,Urumqi 830011,China

出　　处：《Research in Astronomy and Astrophysics》2024年第10期76-80,共5页天文和天体物理学研究（英文版）

基　　金：funded by the National Key R&D Program of China under No.2022YFC2205300;the National Natural Science Foundation of China(NSFC,grant Nos.12073067 and 11973078);the Chinese Academy of Sciences(CAS)“Light of West China”Program under No.2022-XBQNXZ012 and No.2020-XBQNXZ-018。

摘　　要：We introduce the structure of a radio astronomy phased array feeds(PAF)beamforming demonstrator.In a laboratory environment,we have demonstrated beamforming on a received 1.25 GHz sinusoidal signal and used digital weighting techniques to plot the 2D pattern of the PAF.The radio frequency part of the demonstrator includes a 4×4 linearly polarized microstrip antenna array,all of which is connected in series with a low-noise amplifier.The signals from the central 4×2 array elements are injected into a radio frequency system-on-chip digital board,which can receive eight inputs with a bandwidth of 512 MHz.Combining the principle of undersampling,the beamforming is completed at a frequency of 1.25 GHz for the offline data,and a 2D image of the beam is plotted using beam scanning technology.

关 键 词：Astronomical Instrumentation Methods and Techniques Astronomical Databases methods:data analysis 

分 类 号：P111.4[天文地球—天文学]