Multi-physical coupling field calculation method of reflector antenna

Abstract

The invention discloses a multi-physical coupling field calculation method for a reflector antenna, relates to the technical field of reflector antenna analysis, and aims to provide a calculation method which is high in precision, free of conversion errors and high in practicability. The method mainly comprises the following steps: establishing models and assigning values in a fluid field and a temperature field, performing format conversion, performing solid field analysis to obtain surface precision under different working conditions, and performing surface precision synthesis; and superposing a deformed reflecting surface and a feed source vector result, importing the superposed result into high-frequency electromagnetic EDA software, determining the curved surface boundary of the reflecting surface, carrying out interpolation processing on the data points of the reflecting surface to form a continuous reflecting surface, setting calculation parameters, and carrying out calculationto obtain a final electromagnetic result. The method effectively integrates multi-field coupling analysis, and is particularly suitable for design, index budget and strength check of various reflectorantennas.

Description

technical field [0001] The present invention relates to the technical field of reflector antenna analysis, in particular to a multi-physics coupling field calculation method for reflector antennas, which can be used to calculate fluid fields, temperature fields, gravity fields, and solid fields of single reflector antennas and double reflector antennas And electromagnetic fields, especially suitable for index budget and strength check of various reflector antennas. Background technique [0002] Reflector antennas are widely used in the fields of communication, measurement and control, and radio astronomy because of their strong directivity. Reflector antennas, especially reflector antennas working in the high-frequency band, must accurately budget their various technical indicators during the design and demonstration process. Among them, the most critical issue is the impact of the structural deformation of the antenna under various loads on the electrical performance of the...

AI Technical Summary

Problems solved by technology

As we all know, the flow field pressure is a vector value, and only scalar parameters are given in the textbook, which cannot reflect the direction of the force, which will lead to large deviations in the calculation results

[0009] (2) Antenna focal diameter ratio is single

[0010] (3) There is no antenna height value involved

[0011] (4) Lack of secondary reflector data

The data given in the textbook is only for the main reflector antenna, and does not involve the wind flow field data of the secondary reflector in the double reflector antenna

[0012] (5) No other special-shaped reflector antennas are involved

For reflector antennas with different calibers, different types, different geographical locations, and different materials that appear in the project, there is a lack of reference values

[0015] (2) The numerical simulation analysis given in the existing literature is too cumbersome, especially in order to reduce the amount of calculation, the model has been simplified a lot, and a lot has been done for the conduction, radiation and convection in the thermal analysis process. Assumptions, resulting in reduced credibility of calculation results

[0016] (3) Some literatures mention the use of temperature sensors to measure the antenna temperature, but this method is not operable in the design demonstration stage

In addition to estimating antenna efficiency, traditional methods cannot analyze other electrical properties

[0019] (2) Does not reflect the real deformation

[0022] (1) The conversion process from structural calculation to electromagnetic analysis is complex

The above methods need to extract the primary and secondary coefficient matrices of the structural model, and also add element shape functions, the transformation process is complicated, and it is easy to introduce other errors

[0023] (2) Electromagnetic analysis is difficult

This method introduces integral or differential equations, which is difficult to calculate and has a long calculation cycle

[0024] (3) Does not involve feed source and multi-working condition factors

The reflector antenna should include the feed source. In addition, the antenna must bear the loads of gravity, wind and temperature during use. The above method does not involve the content of this aspect

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