MUMBAI, India, Feb. 27 -- Intellectual Property India has published a patent application (202541134087 A) filed by Geethanjali Govindhrajan, Coimbatore, Tamil Nadu, on Dec. 31, 2025, for 'wideband conformal frequency selective rasorber (fsr): a device and method thereof.'
Inventor(s) include Geethanjali Govindhrajan; Mohammed Gulam Nabi Alsath; Kirubuveni Savarimuthu; and Preetha Purusothaman.
The application for the patent was published on Feb. 27, under issue no. 09/2026.
According to the abstract released by the Intellectual Property India: "This invention relates to the design of a dual-layer conformal rasorber (I 00) for RADAR steath applications. The embodiment of the invention of the resistive layer (101) is embedded on one side of the FR-4lossy substrate (103), and transmission layer (102) is embedded on one side ofthe polyimide substrate (1 04) separated by an air gap (h). Thus, the overall profile size is 0.1 Oi1.0 * The proposed embodiment encomposes a hybrid resonator, and an etched Jerusalem cross (115) incorporated with plenty of metallic resonators such as Outer square loop (110), four rectangular strips (105), Cross dipole (107), Cruciform resonator (109), with the integration of lumped resistors (112). The Dual-layer Conformal rasorber (100) covers~ 80% absorption bandwidth from 6.72- 12.5 GHz and 16-19.2 GHz with the FBW of60.1 %, and 19.7% in both lower and higher frequency bands, respectively, and a transmission 3 dB bandwidth from 13.5-15 GHz (I 0.5% fractional bandwidth) with a minimum IL of 0.3 dB with a miniaturized physical form factor of 0.2il.0 0.2il.0 * The proposed structure exhibits angular stability for various incident angles 0 to 60. Owing to the symmetric nature, a stable performance in both TE and TM modes."
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