System and method for testing electromagnetic leakage degree of spaceflight passive product based on reverberation chamber

Abstract

The invention provides a spaceflight passive product electromagnetic leakage degree test system and method based on a reverberation chamber, aiming at the characteristics of the spaceflight passive product in the aspects of frequency, size, process and the like and based on a double-ridge horn antenna theory, a reverberation chamber cavity film theory and the like, miniaturization design is carried out on a transmitting antenna and the reverberation chamber (a shielding chamber, a stirrer and the like) respectively, a 4-40GHz single-antenna double-stirrer reverberation chamber is provided, and a control system, a spectrum analyzer and the like are combined to establish a complete spaceflight passive product electromagnetic leakage degree test system; finally, a related test principle and a test method are given based on reasoning of a transmission line theory, a network reciprocity theorem and the like. The system has characteristics of high field uniformity, automatic mechanical stirring, miniaturized design and the like, and can greatly improve the performance in the aspects of test precision, test efficiency, repeatability, occupied space, cost input and the like of the electromagnetic leakage degree of the spaceflight passive product.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic leakage testing, in particular to a reverberation chamber-based electromagnetic leakage testing system and method for aerospace passive products. Background technique [0002] Aerospace passive products mainly include aerospace filters, multiplexers, connectors and cables, etc., which are widely used in aerospace systems and belong to the weak link of electromagnetic leakage in the system. It is often necessary to focus on evaluating its electromagnetic leakage performance. In recent years, the development trend of aerospace system integration, miniaturization and batching has become increasingly obvious, and the development requirements of miniaturization, high precision, high efficiency and high repeatability have been put forward for the electromagnetic leakage test of aerospace passive products. [0003] At present, it is known from public information that the electromagnetic leakage t...

AI Technical Summary

Problems solved by technology

However, there are the following problems in Comparative Document 1: In terms of the test process, due to the uneven radiation of the product and the idealization of the antenna model, it is necessary to manually find the maximum radiation direction of the product during the test process, which easily affects the test accuracy, efficiency and repeatability

However, there are the following problems in the comparative document 2: In terms of the test process, the reverberation chamber test technology is mainly used to reduce the test error caused by the resonance of the measured cavity, and it is necessary to install a motion mechanism and an internal field strength meter in the shielded cavity of the measured object. etc., while the resonance of aerospace passive products (filters, multiplexers, etc.) targeted by the present invention is a product characteristic, no special consideration is required, and aerospace passive products cannot support the installation of relevant test equipment inside from the size and process

However, the focus of Reference Document 3 is on the technology of improving the field uniformity of the reverberation chamber by various stirrer modes, and it does not provide a miniaturized reverberation chamber suitable for the electromagnetic leakage test of aerospace passive products, nor does it provide A system and method for testing electromagnetic leakage of aerospace passive products based on a miniaturized reverberation chamber

Therefore, Comparative Document 3 cannot be applied to the electromagnetic leakage test of aerospace passive products

[0009] Based on the above considerations, the existing test systems and methods cannot be applied to the miniaturization, high precision, high efficiency and high repeatability testing of electromagnetic leakage of aerospace passive products, and cannot adapt to the future development needs of aerospace electromagnetic compatibility testing technology

According to public information, there is no miniaturized reverberation chamber system and method for electromagnetic leakage testing of aerospace passive products.

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