Naval Group has filed a patent for an absorbent structure with a honeycomb design, featuring tubular cells with walls made of dielectric material. The structure includes electrically conductive coating for wave attenuation of at least 10 dB in a frequency range of 15 GHz or more. GlobalData’s report on Naval Group gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Naval Group, Hydrogen fuel cells was a key innovation area identified from patents. Naval Group's grant share as of January 2024 was 66%. Grant share is based on the ratio of number of grants to total number of patents.

Absorbent honeycomb structure for electromagnetic wave attenuation

Source: United States Patent and Trademark Office (USPTO). Credit: Naval Group

A recently filed patent (Publication Number: US20230395989A1) describes an innovative absorbent structure in the form of a honeycomb structure designed to provide significant attenuation of incident waves in a frequency range of 15 GHz or higher. The structure consists of tubular cells with walls made of a dielectric material, with electrically conductive coating strips strategically placed within the walls. These coating strips have specific resistance values and variations, contributing to the overall attenuation capabilities of the structure. Additionally, the height and width of the strips, as well as the spacing between them, are carefully controlled to optimize the absorption of electromagnetic waves.

Furthermore, the patent also covers methods for manufacturing and optimizing the absorbent structure. The manufacturing process involves printing conductive coating strips, bonding dielectric material wafers, and assembling them into tubular cells before stiffening and curing the structure. An optimization method is also detailed, which includes choosing initial parameters for the honeycomb structure and iteratively adjusting them to enhance the attenuation properties. Additionally, computer program products are mentioned, which can be loaded onto data processing units to implement the optimization method, showcasing a comprehensive approach to developing and utilizing this advanced absorbent structure for electromagnetic wave attenuation.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.