MUMBAI, India, Aug. 10 -- Intellectual Property India has published a patent application (202641090943 A) filed by Dr. Manikandan M; Dr. S. Karthigai Lakshmi; Dr. M. Thiruveni; Dr. P. Gowtham; Mrs. V. Femina; Dr. Ch. V. M. S. N. Pavan Kumar; Mr. J. Vetrimanikumar; and Mr. V. P. Jay Fantin on July 27, 2026, for A Flexible Dual Band Polyimide Printed Antenna For Co-Operative Uav Control And Secure Payload Telemetry.
Inventors include Dr. Manikandan M; Dr. S. Karthigai Lakshmi; Dr. M. Thiruveni; Dr. P. Gowtham; Mrs. V. Femina; Dr. Ch. V. M. S. N. Pavan Kumar; Mr. J. Vetrimanikumar; and Mr. V. P. Jay Fantin.
The application for the patent was published on July 31, 2026, under issue no. 31/2026.
Abstract: A flexible, dual band dish shaped printed antenna made in polyimide material is presented for UAV applications. The dimension of an invented antenna is 59.46×48.96 mm. The thickness of the polyimide substrate is 1mm where the permittivity its 3.5. The antenna features a novel geometry by making the radiating patch with dish shaped structure. The patch is optimized by scaling the dimensions precisely to achieve dual band of operation. The antenna resonates specifically at 2.435 GHz with return loss of -21.083 dB and 4.181 GHz with return loss of -12.853 dB. The VSWR of the proposed invented antenna at resonant frequency is 1.187 and 1.574 respectively. 2.435 GHz band can be used for giving control and command (C2) signals where 4.181 GHz is a licensed band which falls under C band and used to transmit heavy payload signals like HD video etc. In UAV applications, if drone depends on single frequency antenna it paved the way for single radio pipeline for giving C2 signals and to transmit heavy payload data. Also 2.435 GHz band is highly crowded, so it faces lot of interference while operating in urban areas. Hence to avoid this it is decided to optimize dual band so that one pipeline is used for giving C2 signals and other is for transferring HD data’s. The major novelty of the invention is adding polyimide material as a substrate along with copper radiating patch. This ensures aerodynamic conformity so that we integrate the fabricated antenna over any curved surface of UAVs by bending the antenna however its electrical properties won’t get affected. To ensure this the antenna bending characteristics are also evaluated. A sufficient gain of 4.1 dBi and 3 dBi at both the frequencies makes the structure to establish reliable communication. In UAVs, adding every gram is important. If conventional Fr4 material is used as a substrate then the total weight of an antenna is calculated as 8.62 grams whereas for polyimide substrate it is 4.13 grams. This unique dish shaped radiating patch allows easy optimization by precisely scaling the entire radiating structure. This offers engineers to tune the required resonant frequencies with low return loss and VSWR value of 2. Thus, this conformal, dual band and low loss property makes the invented structure more suitable for UAV applications. Keywords: Dish shaped; dual band; polyimide; UAV application.
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