Calculation method for conversion coefficient of electric field measurement antenna in spacecraft cabin

Abstract

A calculation method for conversion coefficient of an electric field measurement antenna in a spacecraft cabin is disclosed. The calculation method comprises the steps of establishing a receiving and sending link model by a software simulation method, establishing an electric field probe in a measurement antenna envelope, simulating receiving and sending link models under the condition of different distances between a horn antenna model aperture and the measurement antenna model aperture, obtaining an electric field probe numerical value and a measurement antenna port voltage numerical value, fitting the obtained numerical values to obtain a relation curve between the electric field probe numerical value and the measurement antenna port voltage numerical value, and finally obtaining the conversion coefficient of the measurement antenna. According to the calculation method, the conversion coefficient of the electric field measurement antenna in the spacecraft cabin is obtained through the computer simulation method; and compared with the existing method, the calculation method of the invention greatly simplifies the solution procedures, shortens the solution time, lowers the solution cost, and greatly satisfies the demands in calculation of the conversion coefficient of the electric field measurement antenna in the spacecraft cabin.

Description

technical field [0001] The invention relates to a method for calculating the conversion coefficient of an antenna, in particular to a method for calculating the conversion coefficient of an electric field measurement antenna in a spacecraft cabin, and belongs to the technical field of electromagnetic fields and microwaves. Background technique [0002] The electromagnetic environment adaptability of the spacecraft is an important issue that must be considered in its reliability design and electromagnetic compatibility design. With the improvement of the function and performance of the spacecraft and the increase of product integration, the transceiver antennas are densely packed in a limited space. , making the electromagnetic environment inside the spacecraft cabin increasingly complex. In order to obtain the electric field distribution and magnitude inside the cabin, commercial electric field probes are usually arranged inside the cabin for measurement. However, the existi...

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Problems solved by technology

In order to obtain the electric field distribution and magnitude inside the cabin, commercial electric field probes are usually arranged inside the cabin for measurement. However, the existing commercial electric field probes have certain limitations. First, their sensitivity is low, and the minimum response range is about 5V / m, smaller signals cannot be measured, and the second is that its output is a comprehensive electric field strength of all measurement frequency bands, and the distribution and magnitude of the electric field at any frequency point cannot be known, so it is necessary to use a small measurement antenna to complete the electric field in the spacecraft cabin There is an urgent need for a fast and efficient method to solve the conversion coefficient of the electric field measurement antenna in the spacecraft cabin

[0003] At present, the conversion coefficient of the electric field measurement antenna in the spacecraft cabin is mainly solved by the experimental method. Using this method can ensure the accuracy of the conversion coefficient solution, but this method requires professional venues and equipment to implement, and it takes 1 to 2 hours per experiment. days, and the cost is tens of thousands of yuan, which cannot meet the daily needs of quickly and efficiently obtaining the conversion coefficient of the electric field measurement antenna in the spacecraft cabin

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