Research on design and key issues of multi-beam active phased array VLBI radio observation system
The multi-beam active phased array system has the characteristics of flexible beam pointing and si-multaneous multiple beams,which has great application prospects in radio very long baseline interferometry(VL-BI).According to the characteristics and advantages of the multi-beam active phased array radio observation sys-tem,this paper discusses the frequency selection,polarization mode,multi-beam design,system equivalent flux density,etc.in the system design.And then,in view of the special problems existing in the multi-beam active phased array radio observation system,the paper analyzes the key technical problems of the system,proposing the methods of low-cost digital multi-beam reception and high-precision calibration of ultra-large-scale phased array antenna.The research results provide a useful reference for the implementation and application of the multi-beam active phased array radio observation system.
active phased arrayradio astronomysystem designVLBImulti-beam
万方数据
维普
