MUMBAI, India, Jan. 9 -- Intellectual Property India has published a patent application (202541130514 A) filed by Principal; and Diya Ann Jacob, Kanjirappally, Kerala, on Dec. 23, 2025, for 'microwave resonator-based microplastic detection system in aquatic environments.'

Inventor(s) include Diya Ann Jacob; Archana T; Aimy Achu Asish; Alna Maria Biju; Albert Joji; Dr. Godwinraj D; and Dr. Godfrey D.

The application for the patent was published on Jan. 9, under issue no. 02/2026.

According to the abstract released by the Intellectual Property India: "The current invention is a self-sufficient, portable, and floating device that detects microplastics in water in real-time using near-field microwave sensing. In the sensing region of the apparatus, which includes a Flame Retardant-4 antenna module positioned underneath a fluid-carrying pipe, microplastics and flowing water samples interact with a localized near-field electromagnetic field. Detectable shifts in the resonant microwave response are caused by measurable changes in dielectric properties caused by microplastic particles moving through the sensing region. The system also includes a vector network analyzer for real-time signal acquisition, a GPS module for geolocation tagging, a microcontroller with an integrated battery management system for data processing and control, a pump for continuous water flow, and a rechargeable battery powered by a solar panel for extended field operation. Each part is contained in an overall, buoyant casing that can be used on both artificial and natural water bodies. The invention provides an inexpensive, field-deployable solution for assessing industrial discharges and long-term aquatic pollution surveillance, enabling continuous, label-free, non-destructive in-situ monitoring of microplastics without the need for laboratory-based sample preparation."

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