Evaluating system and method based on radio astronomical instrument device electromagnetic radiation

Abstract

The invention relates to an evaluating system and method based on radio astronomical instrument device electromagnetic radiation. The evaluating system comprises a microwave switch, a receiving antenna, a reference noise source, a signal source and an emitting antenna, wherein two normally-open contacts are arranged at one end of the microwave switch, the other end of the microwave switch is connected to a spectrometer through a pre-amplifier, the spectrometer is connected with a computer, the receiving antenna is connected to one normally-open contact of the microwave switch, the standard noise source is connected to the other normally-open contact of the microwave switch, the signal source is connected to the computer through the network, and the emitting antenna is connected to the output end of the signal source through a radio frequency cable. According to the system and method, by means of the technical index and observation requirements of a radio astronomical observation system, radio astronomical instrument device radiated emission is tested and evaluated, the influence of radio astronomical instrument device radiated emission on a radio telescope is analyzed, so that reference is provided for compatibility design, shielding design and site radio management of the radio astronomical observation system, and the engineering significance is high.

Description

technical field [0001] The invention relates to electromagnetic interference testing and evaluation technology in electromagnetic compatibility technology, in particular to an evaluation system and method based on electromagnetic radiation of radio astronomical instruments and equipment. Background technique [0002] my country's national military standard GJB72-85 stipulates that electromagnetic compatibility refers to the ability of electronic and electrical equipment or systems to work normally according to the design requirements in the expected electromagnetic environment. It reflects that the equipment or systems can work normally when they are subjected to electromagnetic disturbances. At the same time, it does not generate electromagnetic disturbance exceeding the specified limit. Electromagnetic compatibility is an important performance index of equipment or system, and it is also an important factor to ensure the working efficiency of the system and improve the reli...

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Problems solved by technology

These standards are widely used. The standards give the limit value of the radiated emission electric field strength at a given distance of the tested equipment. Radiation tests are usually tested in a microwave anechoic chamber. Level limits, therefore, cannot provide a basis for assessing the impact of radio astronomy instrumentation radiated emissions on radio astronomy observations

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