On the interference characteristics of fully steerable radio telescope

Abstract

Fully steerable radio telescope is a complex system including actuators, antenna high power driving subsystem, high sensitive receiving terminal, data transmission and control subsystem. Because of the great difference in electrical level between strong electricity subsystem and weak electricity subsystem, the very weak celestial RF signals which need to be received will be interfered by the interactive electromagnetic interferences which exist in the system, the electromagnetic emission signals generated by devices in operation and the different electromagnetic signals of environment. The electromagnetic compatibility (EMC) of radio telescopes has become the key technology of the development of and the usage of systems. In this paper, the research progresses of EMC technology of the radio telescope are summarized. From the view of system engineering, the electromagnetic interference characteristics of radio telescope system are studied, the critical control factors are determined, and an interference coupling matrix is established. Based on the electromagnetic topology theory, the EMC modeling approach to radio telescope system is presented, which provides the theoretical bases for the EMC technology researches in radio telescopes.