Diamond Shaped Microstrip Fractal Antennafor Biomedical Applications N. Porchelvi 1 , P. M. Poongodi 2 , R. Sowmyadevi 2 , K. Suvetha 2 , R. Vinotha 2 1 Associate professor, Department of Electronics and Communication Engineering, Vivekanandha College of Technology for Women, Tiruchengode, Tamil Nadu, India. 2 UG Students, Department of Electronics and Communication Engineering, Vivekanandha College of Technology for Women, Tiruchengode, Tamil Nadu, India. ----------------------------------------------------------------------------***-------------------------------------------------------------------------- ABSTRACT: In this paper, a diamond-shaped micro-strip patch antenna is created using fractal patterns. Industries include factories, the study of conductors, and the realm of medicine, where antenna were frequently utilised for imaging purposes. Different feeding techniques, including micro-strip feeding, inset feeding, and coaxial feeding, are used to simulate and compare the proposed antennas. Comparing these three feeding methods, the inset feeding antenna feeds better than other feeding methods. The created antenna is small in size of 20L*1.6W* 20H with FR4substrate. A variety of factors, such safeguarding patients, miniaturisation, biological compatibility, minimal power and energy consumption, limited frequencies in functioning, as performance must all be taken into attention to allow the implants antenna to function more reliably and constantly. The glass- reinforced epoxy laminate material FR-4 with a dielectric constant of 4.4 has been selected as the dielectric material for this method. In the design of implantable sensors, choosing the antenna is a difficult problem because it affects how well the entire implant performs. For implantable medical applications, we can choose Rogers5880 substrate. For the entire operational frequency range, the DS- MPA has a Voltage Standing Wave Ratio (VSWR) of 1.64 and a Return Loss (RL) of -23.01dB. HFSS is used to design and model the antenna and achieves good output response. It resonates at frequency ranges of 3.8, 5.6 and 8.2 GHz. Keywords: Industrial, Scientific, and Medical (ISM), Biomedical applications, FR-4, VSWR, Return Loss,5G applications. 1. INTRODUCTION: Today, different types and shapes of antenna are being developed using different substrate materials. An antenna is an electric device which converts electric energy into radio waves and vice versa. It is being used for radiating and receiving the radio waves. Micro-strip antenna plays a vital role in Wireless communication. MSA is a radio antenna which is small, less weight, and easy for manufacturing. Many industries needed a compact, miniaturized and affordable wireless devices. Micros trip antennas are developed using different substrate materials and different geometries based on the operating frequency.[10]There are various frequency bands for biomedical applications, including ISM (Industrial, Scientific, and Medical), which has a 2.4 GHz frequency band, MICS (Medical Implantable Communication Service), and Med Rad (Medical Device Radio band), whose frequency range is 401- 457 MHz. Popular in biomedicine is the implanted antenna, which can pick up bio-signals and send them to an outside device. It is used in medicine, healthcare, and the treatment of cancer. Both the doctor and the patient can benefit from the ability to self- monitor. The human body contains implantable antennas that are used to monitor things like temperature, blood pressure, and sugar levels. Fractal designs are used to create a diamond- shaped micro- strip patch antenna. For more effective analysis, fractal structure was used.[14]The term "fractal" describes a wide range of extremely asymmetrical curves or patterns that are reproducible at all scales. The functionality of the traditional antennas is improved by the employment of fractal structures. The fractal structures are derived using a variety of shapes, including square, rectangle, triangle, trapezoid, circle and oval. The proposed micros trip antenna is made by cutting a rhombus with a side length of 4 mm to get the diamond-shaped micros trip antenna. Tuning stubs are also employed in conjunction with the structures to enable broadband operation. The antenna's performance is influenced by the substrate's thickness, permittivity, and material.[2] 2. LITERATURE REVIEW: In order to minimize the size of the radiation structure, a triangular MPA is created for automotive applications. In vehicular communications, it can be used to identify blind spot detection. With a 79% compactness, the proposed structure operates at a frequency of 5.88 GHz. The authors of this research have designed a rectangular MPA for use with Wi- Fi.[5]To make the physical structure smaller, self symmetry fractal patterns are used. The Sierpinski carpet fractal shapes are added to the ground portion of the MPA to International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 10 Issue: 05 | May 2023 www.irjet.net p-ISSN: 2395-0072 © 2023, IRJET | Impact Factor value: 8.226 | ISO 9001:2008 Certified Journal | Page 528