A Design Method of Unintentional Radiation Emission Limits for Broadband Radio Frequency Receiving Satellites

Abstract

The invention provides a method for limiting the unintentional radiation emission of a wide-band radio frequency receiving satellite. By establishing a verification model and performing simulation analysis, verifying the correctness of the algorithm and setting, establishing a star analysis model, and performing three-dimensional electromagnetic simulation in electromagnetic simulation software Analysis, to obtain the path attenuation at different positions, according to the path attenuation L obtained by the simulation analysis, the sensitivity S of the radio frequency receiver, select the EMC safety margin according to the critical category of the control object, and calculate it according to the fourth step of tightening the EMC safety margin The control limit of unintentional electromagnetic radiation emission is obtained after the electric field strength is obtained. The method of the present invention fully considers the influence of factors such as path attenuation and star shielding in the limit value design process, avoids the under-design and over-design of the traditional method, and fully considers the critical category of the controlled object to design the safety margin , improve the pertinence of limit value control, verify the accuracy of analysis through the verification model, and improve the accuracy of limit value design.

Description

technical field [0001] The invention relates to a design method for the limit value of satellite unintentional radiation emission, in particular to a limit value design method for the control of unintentional radiation emission in the radio frequency receiving band of a wide-band radio frequency receiving satellite. Background technique [0002] Spacecraft, such as satellites, etc., the unintentional radiation of the equipment in the cabin is emitted on the cable of the equipment, which will affect the receiver's reception of normal signals. Therefore, the emission control of unintentional radiation is an electromagnetic compatibility item clearly stipulated in industry standards. It is also the focus and difficulty of spacecraft electromagnetic compatibility design and electromagnetic interference control. In the top-level design stage of the satellite electromagnetic compatibility system, the emission limits of satellite unintentional radiation must be designed to control ...

AI Technical Summary

Problems solved by technology

[0003] The existing method of using general limits cannot be specifically designed for specific satellites, and the design method of emission limits for satellite unintentional radiation is prone to under-design or over-design problems

[0004] The existing limit method for the electromagnetic interference control standard in the radio frequency receiving band is mainly obtained by calculating the receiver sensitivity, receiving antenna gain and operating frequency. The limit value formulated by this limit method does not take into account the The propagation of unintentional radiation to the feed source also needs to pass through factors such as path attenuation and star shielding, such as: cabin shielding, angle of interference incident to the feed source, radiation direction of the device itself, near-field effect, etc.

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