EXPERIMENTAL FACILITY BASED ON ANECHOIC CHAMBER FOR ACTIVE RADIOSENSORY TECHNICAL DIAGNOSTICS
Abstract
The article presents the results of the development and experimental study of two designs of anechoic chambers designed for active radiosensory technical diagnostics (ARTD). The aim of the work was to create conditions for obtaining a reliable radio signal profile (SRP) of the object under study with minimal distortion due to the effective suppression of external electromagnetic interference and reflections. As part of the study, two configurations of shielded volumes were implemented: the first based on a multilayer foil reflective structure, the second using high-quality Faraday fabric. Comparative evaluation testing of the shielding efficiency was carried out at different states of the microwave element. The state of the microwave element was changed by changing the scheme of the microwave mixer, by soldering out key elements. To verify the functional characteristics, a series of measurements were performed by probing the surface of the microwave mixer under study with short pulses (SP). The resulting SRP was recorded using an oscilloscope and a receiving antenna. Pearson correlation analysis was used to process the results, which proved effective in quantifying the differences in the SRP of an object in good and defective conditions. The experimental data obtained made it possible to evaluate the quality and prospects of materials based on key parameters: the degree of suppression of parasitic signals, resistance to external interference in various operating conditions, mechanical durability under cyclic loads, and the economic feasibility of implementation, taking into account the cost of materials and the complexity of assembly. The results of the study demonstrate the practical applicability of both designs in precision radio measurement tasks, while the choice of a specific material is determined by an optimal compromise between production costs, performance characteristics in various climatic conditions and the required level of shielding for a specific application. The data obtained can be successfully used in the design of both stationary laboratory complexes and mobile ARTD systems in conditions of limited resources, including field measurements and industrial monitoring. Studies have shown the promise of both approaches to achieve maximum shielding characteristics over a wide frequency range
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