Dr. ASHOK KUMAR SRINIVASAN
@jits.ac.in
PROFESSOR & HEAD and Electronics and Communication Engineering
Jyothishmathi Institute of Technology & Science
RESEARCH INTERESTS
Antennas, RF & Microwave
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
A. Manjula, P. K. Vaishali, P. Pranitha, and S. Ashok Kumar
World Scientific Pub Co Pte Ltd
Parkinson’s disease (PD) is a progressive neurodegenerative illness that frequently affects phonation, articulation, fluency, and prosody of speech. Speech impairment is a major sign of PD which can be employed for the earlier identification of the disease and provide proper treatment. Besides, the machine learning (ML) models can be commonly employed for PD detection and classification by the use of speech data. Since the speech data has the features of maximum data redundancy, high aliasing, and small sample sizes, dimensionality reduction (DR) techniques become essential for effective PD diagnosis. Therefore, this paper presents a new DR with weighted voting ensemble classification (DR-WVEC) model for PD diagnosis. The presented DR-WVEC model operates on different stages such as pre-processing, DR, classification, and voting process. Primarily, the speech data undergoes min–max normalization process in order to normalize the speech data. Besides, linear discriminant analysis (LDA) technique is applied for reducing the dimensionality of the features. In addition, an ensemble of two ML models, namely extreme learning machine (ELM) and Adaboost models, is employed for classification. Finally, a weighted voting-based classification process is carried out where the integration of two ML models takes place and the highest outcome is chosen as the final results. In order to assess the effective PR diagnostic outcome, an extensive set of simulations were carried out on Parkinson’s telemonitoring dataset. The obtained experimental results reported the betterment of the DR-VWEC technique over the other compared methods in terms of different aspects.
S. Ashok Kumar, T. Shanmuganantham, D. Sindhaniselvi, and A. L. Sharon Giftsy
Springer Science and Business Media LLC
N Sudhakar Reddy, Naveen Kilari, N.P. Dharani, and S Ashok Kumar
Elsevier BV
Vangala Indhrani, Ashok Kumar Srinivasan, and P. Khobragade Vaishali
Springer Science and Business Media LLC
G. Narmadha, M. Malathi, Srinivasan Ashok Kumar, T. Shanmuganantham, and S. Deivasigamani
Elsevier BV
Abstract A novel and small sized implantable antenna has been proposed for scientific industrial & medical (ISM) band applications. The proposed antenna is — shaped antenna and it is a circular patch antenna which has been designed based on the previous research articles and the lower size is achieved by implementing different miniaturization techniques. The radiating structure has a circular shaped patch and it has fillet edges with square shape. The back reflections have been avoided by extending the ground plane over the complete plane. The proposed antenna has been structured by using ROGER 3010 substrate which has the thickness of 1.6 mm and dielectric permittivity of 10.2 in order to achieve the geometries of an antenna with rigidity, the proposed structure has been designed. This antenna structure is operated at 2.45 GHz with the most recommended omni-directional pattern that has been used for transmitting with other in body devices.
T. Shanmuganantham, D. Sindhanaiselvi, and Ashok Kumar Srinivasan
Inderscience Publishers
Thangavelu Shanmuganantham, Srinivasan Ashok Kumar, and Dhanapalan Sindhahaiselvi
The Electromagnetics Academy
This paper explores a loaded conductor backed coplanar waveguide (CB-CPW) split ring resonator (SRR) fed U-slot planar antenna used for healthcare monitoring via the wireless scientific industrial medical (ISM) band and medical service band at fifth generation (5G-MSB). The antenna has been designed with bio-tissue layers, muscle layers, skin, and fat. The parameters of the designed antennas, such as miniaturization, increased gain, and enhanced bandwidth, are presented. The proposed prototype results in the total size of 640mm3. Such designed antenna has been operated at (3.4–3.6)GHz — fifth-generation medical service band and at (2.38–2.48)GHz — industrial scientific band and can realize proximately omnidirectional radiation pattern over the operating bands.
Vangala Indhrani, K. Mounika, and Srinivasan Ashok Kumar
Springer Singapore
T. Shanmuganantham, K. Bharath Kumar, and S. Ashok Kumar
Elsevier BV
S. Ashok Kumar and T. Shanmuganantham
Springer Science and Business Media LLC
In this paper, design of a flexible antenna which is used in the field of biomedical applications. This technology consists of two methods mainly i.e. 1.Magnetron sputtering method, 2.Laser ablation method. Magnetron sputtering method is use to set slight copper coating upon polyimide substrate. Secondly Laser ablation method is mainly used to incise an antenna as of copper coat. The different parameters are simulated and measured practically. The outcomes of the verified results are good and have a satisfactory response. There are many advantages such as price, momentum, elasticity over lithography process frequently used for such applications.
K. Venugopal Rao, S. Ashok Kumar, and T. Shanmuganantham
Springer Singapore
S. Subramanyam, S. Ashok Kumar, and T. Shanmuganantham
Springer Singapore
K. Venugopal Rao, Lakkireddy Alekya, S. Ashok Kumar, and T. Shanmuganantham
Springer Singapore
Guda Srikanth, S. Ashok Kumar, and T. Shanmuganantham
IEEE
In this paper, design of ground radiation antenna using EBG technology for GPS applications. The compact electromagnetic band gap single cell is introduced in the middle of ground radiation and battery to reduce performance of ground radiation antenna due to huge battery. A minute loop-type circuit with 2.41-GHz Bluetooth, GPS applications is designed and it is comprised in the ground radiation antenna. By using meandering-line technology, a square split-ring resonator is constructed by changing compact EBG single cell. Efficiency of the proposed antenna is obtained as 90%at resonant frequency.
Srinivasan Ashok Kumar and T. Shanmuganantham
Springer Science and Business Media LLC
In this paper a novel coplanar waveguide fed antenna with inverted six shaped configuration having wide band attributes, proposed and designed on a FR4 substrate. The dimensions of the designed antenna are 54 mm × 38 mm. Few rounded corners system is used in this design to improve the bandwidth and gain of proposed antenna. Being a simple antenna, it makes it extremely reasonable for the future generation of Internet of Tings applications. A well-ordered outline process is completed to get an upgraded plan for good impedance matching in the required band. The Reflection coefficients along with the current densities at various phases of the design process are discussed and analyzed to get a decent understanding into the proposed antenna plan. The proposed antenna exhibits stable radiation, having low back lobes and low cross polarization and having greatest gain 6 dBi.
Athineni Supriya, S. Ashok Kumar, and T. Shanmuganantham
IEEE
In this paper we are going to study about structure and research a inserted equivalent port of antenna and it is used in biomedical utilization. A coplanar waveguide (CPW) fed antenna consist of split ring resonators and this resonators will have a diffusing element is a single pole elliptical pop antenna. the instill conformal Coplanar waveguide-fed pop antenna echo’s with a frequency of 5.8GHz (in a free space)it will have an impedance of 810MHz and again of 2.0dB is observed The antenna are used in dissimilar layers of human substance model of simulation, with the antenna operates at industrial medical scientific band. A human body can observe a specific absorption rate (SAR), and it is used to measure the rate of energy. This antenna shows better observations between simulation and measurement results.
Parvathaneni Akhila, S. Ashok Kumar, and T. Shanmuganantham
IEEE
In this paper a compact metamaterial inspired antenna with dual-circular polarization for nanosatellite payload communication is presented. This structure consists of a rectangular sandwich parasitic layer. Two feedings to develop the dual-circular polarization 2 double negative metamaterial cells, 2 related feedings are used and 1U nanosatellite structure has been used in operation of real-time environment to comprehend antenna performance.
Sana Subramanyam, S. Ashok Kumar, and T. Shanmuganantham
IEEE
A novel thick and wideband CPW-fed twisted-slot receiver is presented in this paper. This CPW antenna is used in major applications such as multiband, ISM band, bluetooth, wireless field. This compact wide band slot antenna operates at a frequency of 2.4GHz. The simulated and obtained graphs are satisfactory, the gain is 4dBi at resonant frequency. The designed receiver is also applicable for MIMO (multi input multi output) array appeal.
S. Ashok Kumar and T. Shanmuganantham
IEEE
In this paper T shaped microstrip monopole Antenna has been designed and proposed here for L band Applications. This proposed antenna structure involves a symmetric T slot concerning rectangular patch. The Results demonstrate that T Slot receiving antenna operated at frequency range from 1.2 to 1.7GHz, which is able to accomplish least voltage with great transmission capacity and radiation properties. Finally a Microstrip patch antenna working at full resonating frequency 1.5 GHz is designed. Operating frequency of the L band is in the range of 1 GHz to 2 GHz. Wavelength of L band from 30 cm to 15cm. Major Applications in the L-band are Radars , Radio , Telecommunication , Global positioning system(GPS) and Air Craft surveillance.
S. Ashok Kumar and T. Shanmuganantham
IEEE
This paper presents implantable antenna systems which are miniaturized and it is proposed for biomedical applications, particularly for scalp administration. The advanced prototypes reveal the broad band features on the industrial, scientific, and medical (ISM) bands. Every structure is concatenated with the microelectronic constituents and a battery. The methodology and the operation are discussed briefly in this paper. The results of scalp implantable antenna produces a band from 0.9GHz to 0.92GHz. The measurements are fulfilled in an isotonic solution of sodium chloride for validation. The antenna proposes a fine accordance between the simulated and firmed results and to examine the range of the data transmission, a link budget is calculated.
Vineesha Alladi, S. Ashok Kumar, and T. Shanmuganantham
Springer Singapore
The multi-input multi-output (MIMO) terminal characteristics are used for the high examined element of dual-band MIMO antenna with the pattern diversity that has been proposed. The MIMO terminal antenna is having two similar monopole components. By calculating the envelope related to each other coefficient (ECC) and radiation patterns, the MIMO terminal pattern is checked. This antenna exhibits good efficiency and gain. The outcomes obtained for the designed antenna are very perfect.
B. Soumya, S. Ashok Kumar, and T. Shanmuganantham
Springer Singapore
In this paper, CPW-fed slotted flexible antenna has been presented for 5G mobile applications. The element of the bent antenna topology is analyzed to reduce the physical footprint, and a simple inspection with the terminals of a mobile is operated in the frequency band of 4.1 GHz. Ratio in the middle of the front and back of the bent antenna shows a high specific mapping up to the rate of a ratio of 1 dB. A compact wideband reflector is reported with a direct aspect ±90° and transmission <−25 dB. TThe broadband reflector is combined with a region twister over an antenna with 0.135λ long distance from the emitting design. The region twisted receiver is utilized in 4.1 GHz band combined with reflector, with a ratio in the middle of the front and back greater than 14 dB over the frequency and an onward gain of 5.5 dBi.
Tharalitha Reddy, S. Ashok Kumar, and T. Shanmuganantham
Springer Singapore
In this paper, a novel slot antenna has simple structure and small size designed for medical wearable applications. Good insulation is used as the substrates for flexible antenna, and it can be proposing for the medical applications and military purposes. When relative permittivity values are going to be deceased to low range, this is to activate performance of the antenna. The flexibility nature of the structure is the interaction between the gaps which make the antenna performing the radiation effectively. This antenna is health monitoring devices for human and animals. The proposed antenna consists of slot radiation elements fed by a coplanar waveguide (CPW) structure and a floating ground. The impedance matching bandwidth of the antenna is from 3.2 to 3.6 GHz, which can cover the 3.4 GHz band and perform good radiation characteristics.
P. Manaswini, S. Ashok Kumar, and T. Shanmuganantham
Springer Singapore
A reduced planar omnidirectional MIMO antenna accompanied by pattern phase variety is to be discussed in this paper. Because of the restricted bandwidth of the perpendicular-polarized element, the shape of usual MIMO antennas with two polarizations has extremely occurred in two-dimensional integration. Hence, for planar integration as for omnidirectional MIMO antenna, a two-slot parallel-polarized antenna is introduced. This antenna is made up of folded dipole array with four elements, and to feed the two channels in the company of shared elements, a close packed feed network having a pair of 90° continuous phases is hired, so this integration of antenna can be done in a sheet of substance with 0.8 mm ultra-low profile. Even though the polarization and radiation diagram of both the channels located adjacent to each other are similar to one another, as a consequence of unrelated pattern phase, an advanced isolation is yet achieved. So, a possible solution for planar integration of the system is done by the proposal of dual-channel antenna.