@karunya.edu
Professor ,Department of electronics and communication Engineering
Karunya Institute of Technology and Sciences
BE. ME, Ph.D
Antenna design, Wireless sensor networks, RF design
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
J. Vijitha Ananthi, P. Subha Hency Jose, and M. Nesasudha
Elsevier BV
Karthikeyan T. Angappan, Moses Nesasudha, Moses Abi T. Zerith, and Agbotiname Lucky Imoize
Walter de Gruyter GmbH
Abstract A Polydimethylsiloxane (PDMS) based antenna is designed for skin tumor detection. The antenna functions at 2.45 GHz with a bandwidth of 2.30–2.64 GHz working in the ISM (Industrial, Scientific, and Medical) band. The size of the antenna is 40 × 40 × 1 mm3. This antenna detects tumors in the skin by considering the variations in values of the E-field, J-surf, and H-field. Various analyses such as the distance between the patch and stacked layer skin phantom for different tumor sizes and input power to the antenna are changed and antenna performance is observed. A significant amount of changes is attained which denotes the presence of the tumor. The proposed antenna is fabricated and the corresponding results are analyzed in the Anechoic Chamber. The antenna has an efficiency of 99 % with a Specific Absorption Rate of 1.3846 W/kg which is lower than 1.6 W/kg as per the recommendations of FCC standard.
T A Karthikeyan, M Nesasudha, S Saranya, and B Sharmila
Elsevier BV
B. Anitha Vijayalakshmi, S. Lekashri, R. Mary Victoria, M. Gomathi, and M. Nesasudha
Springer Science and Business Media LLC
B. Anitha Vijayalakshmi, A. Senthil Kumar, V. Kavitha, and M. Nesasudha
Springer Science and Business Media LLC
T. A. Karthikeyan, M. Nesasudha, and G. Shine Let
Springer Science and Business Media LLC
B. Anitha Vijayalakshmi, P. Gandhimathi, and M. Nesasudha
Springer Science and Business Media LLC
B. Anitha Vijayalakshmi, S. Lekashri, M. Gomathi, R. Ashwini, B. Arunsundar, and M. Nesasudha
Springer Science and Business Media LLC
B. Anitha Vijayalakshmi, B. Arunsundar, Anitha Gopalan, P. Gandhimathi, V. Kavitha, and M. Nesasudha
Springer Science and Business Media LLC
Doondi Kumar Janapala, Nesasudha Moses, and Rangarao Orugu
Springer Science and Business Media LLC
B. Anitha Vijayalakshmi and M. Nesasudha
Springer Science and Business Media LLC
Doondi Kumar Janapala, Nesasudha Moses, and Jebasingh Bhagavathsingh
Cambridge University Press (CUP)
Abstract This research work presents an implantable antenna that operates at 5.8 GHz. By using a radiator with a loop-based design, the antenna can be made smaller. Radiator is made up of three connected rectangular loops. On the substrate’s back side, an I-shaped ground plane is used. As substrate and superstrate, polydimethylsiloxane (PDMS) with dimensions of 7 mm × 5 mm × 0.3 mm is used. The conducting sections are made using copper foil that is 30 µm thick. The suggested antenna is examined by the implantable medical device using realistic human scalp phantom models and a homogenous skin box. Simulated study revealed that it operates around 5.8 GHz with a bandwidth from 5.69 to 5.92 GHz. The specific absorption rate was 0.28 and 0.26 W/kg for skin box and human scalp phantoms, respectively, at 1 mW input power across 1 g volume tissue.
T. A. Karthikeyan, M. Nesasudha, and S. Saranya
Springer Nature Singapore
Deepthy G S and Nesasudha M
IEEE
Microwave breast imaging (MBI) promises a more accurate and safer modality for breast cancer detection to provide information about breast tissues that uses longer wavelength low power signals when compared to other conventional techniques like X-ray mammography. This paper includes the performance analysis of slot loaded microstrip patch antennas suitable for breast cancer detection. Four types of antennas structures: without any slits, with truncated corners, with L shaped slots and square shaped slits arranged serially are designed with the help of FR4(dielectric constant = 4.4) as the substrate which is simulated using CST software. The designed antenna has been compared with conventional ones and results shows the superiority of designed antenna in terms of S11parameter, gain, directivity, return loss. The gain of the designed antenna is far superior to that of conventional antennas. As such antennas are used extensively for medical applications the measure of specific absorption rate (SAR) becomes very critical. It has been observed in the different structures that insertion of slits, slots and truncations helps to vary the resonant frequency of the antenna and helps in achieving circular polarization which is needed for medical applications. Optimum performance is achieved using the designed antenna in terms of gain, VSWR, return loss and the radiation limits were obtained which falls within limit of 1.6 W/kg as recommended by FCC.
Josheena Gnanathickam, Gajula Thanusha, and Nesasudha Moses
IEEE
This paper presents the design of single band microstrip patch antenna for 5G applications. Now a days, most of the fields are adopting the 5G technology to connect millions of devices together. This future technology can be used in smart buildings, machine communications (IOT), Robotics and Greater speed data transmission applications. For better communication between the devices, it is necessary to design a efficient antenna. Mostly 5G antennas are used in microwave as well as millimeter frequency bands. 3.5 GHz range which falls under the C-band which is the basis for the 1st implementations of 5G technology worldwide. The commercially available FR4 substrate which has the flame resistant property, have been used in this antenna with an overall dimension of 29.8 x 36x1.6mm3. The proposed antenna operates in the 5G bandwidth of 3.4-3.6 GHz with the resonating frequency of 3.5 GHz. The proposed 5G antenna had been designed and simulated in the ANSYS HFSS software. The resultant antenna shows the return loss -22dB at 3.5 GHz, good Sparameter, acceptable gain and radiation efficiency.
Rangarao Orugu, M. Nesasudha, and Doondi Kumar Janapala
IEEE
this paper, presents a polarization re-configurable antenna for 5G applications operating at 3. 5GHz for n78 band. A micro-strip fed rectangular patch antenna is used in this design. A slant rectangular slot is made into the patch to divide it into two parts. One part is connected to the strip feed and another part with gap made due to slot. The non fed part of the patch is connected to an E-shaped stub in a slant way similar to the slot. A PIN diode is placed into the slot to make connection in between the two parts. The PIN diode switching condition helped in shifting polarization from linear to circular vice versa, making the antenna suitable for 5G applications.
Rangarao Orugu, M. Nesasudha, A.K. Chaithyanya Varma, and Doondi Kumar Janapala
IEEE
This paper presents a monopole antenna operating at 3. 6GHz for 5G applications. The design consists of a planar monopole strip line connected to two semicircular discs on both side of the strip line. The FR4 substrate is used as dielectric material and the partial ground is used at back side. The ground plane is maintained in a $\\Omega$ shaped conducting part. The antenna operates at 3. 6GHz with bandwidth of 110MHz. The antenna maintained a compact size of 28mm× 20.5mm. The antenna is suitable for narrow band 5G application at 3. 6GHz.
Clara Catherine C, S Sweetlin Rebecca, Ashick Joel S, and Nesasudha Moses
IEEE
This study presents the development of a textile based wearable patch antenna for medical applications. The growing trend of Body Area Networks (BAN) has contributed to the popularity of wearable antennas. A type of wearable antenna known as a textile antenna uses textile material as its substrate or patch. Hence, denim is used as a substrate and copper is used as ground and patch. It is employed in body-worn applications for communication in space, the military, and the healthcare industry. Since the antennas are installed on people, it is crucial to measure their individual absorption rate. An antenna of 2.45 GHz is constructed and a phantom model with and without tumor is tested and validated for tumor detection. This design is done in ANSYSHFSS software and it is also fabricated. The recommended antenna's fabrication, measurement, and experimental verification have all been performed.
Rangarao Orugu, Nesasudha Moses, and Doondi Kumar Janapala
Springer Nature Switzerland
G. Shine Let, M. Nesasudha, N. M. Sivamangai, and S. Sridevi Sathya Priya
Springer Nature Singapore
G.S. Deepthy and M. Nesasudha
Elsevier BV
Abi T. Zerith Moses and Nesasudha Moses
Hindawi Limited
A highly efficient self‐isolated multiple‐input multiple‐output (MIMO) antenna system functioning in the n46 5G NR band (5.15–5.925 GHz) for smartphone implementation is discussed in this paper. The system is made up of two blocks of vertically printed antenna pairs, placed at the exact center of the side frames of the smartphone. Each block comprises of a self‐isolated antenna pair with two inverted L‐shaped radiators facing each other, a T‐shaped isolating element, and a U‐shaped structure placed at the back of the radiators, and is attached to the ground plane. A simple coaxial feeding structure is deployed to excite the L‐shaped radiators. The T‐shaped structure placed between the two radiators has a crucial role in minimizing the mutual coupling between the two radiators, and its arm serves as a radiator. The self‐isolated antenna pair functions from 5.10 to 5.98 GHz, covering the entire n46 band (5.15–5.925 GHz) with over −16.8 dB isolation in the complete operating bandwidth. The parametric investigation of some ideal parameters and the antenna pair evolution stages to obtain the final structure is examined for a superior understanding of the functioning of the proposed MIMO smartphone system. The proposed self‐decoupled antenna pair MIMO system operates with a very high radiation efficiency and gain in the complete operating bandwidth, with radiating efficiency, total efficiency, and peak gain greater than 92%, 85%, and 6 dB respectively. The lowest obtained envelope correlation coefficient (ECC) value is 0.025 between the two elements in the antenna pair, which is very low when compared with the ideal value of 0.5. Various other parameters like channel capacity loss (CCL), mean effective gain (MEG), total active reflection coefficient (TARC), and diversity gain (DG) of the proposed system are also calculated and examined with the experimental results to study the diversity performance of the proposed MIMO smartphone system. A prototype of the proposed 4‐port MIMO smartphone system is fabricated and various parameters are examined. The coherence between the measured and the experimental outcomes stipulates that the proposed system is a capable contender for application in the upcoming 5G handheld devices.
B. Anitha Vijayalakshmi and M. Nesasudha
Springer Science and Business Media LLC
Jebasingh Bhagavathsingh, Ramesh Pugulanthi, Parimala Devi, Abiram Angamuthu, Doondi Kumar Janapala, Nesasudha Moses, Visweshwer Sivasankaran, S. Philip Anthony, and Renugopalakrishnan Venkatasan
Springer Science and Business Media LLC