Dr Divya Chaturvedi, Assistant Professor, Department of Electronics and Communication Engineering, has come up with an exciting proposal for enhanced connectivity and high-speed data transmission across the Internet of Medical Things (IoMT) devices. Her research paper titled “Design of Antenna-Multiplexer for Seamless On-Body Internet of Medical Things (IoMT) Connectivity” has been published in the journal ‘IEEE Transactions on Circuits and Systems II: Express Briefs’, having an impact factor of 3.71. It was published in collaboration with Dr Arvind Kumar from Vellore Institute of Technology and Dr Imaculate Rosaline from Ramaiah Institute of Technology, Bangalore.

The research looks into the design and development of a multi-band self-triplexing antenna for Medical Things (IoMT) applications. The antenna is designed to operate at 5.2, 5.5 and 5.8 GHz and self-isolation is achieved below -23.9 dB. It also offers seamless communication links to other devices operating at the same frequencies. The designed antenna is cost-effective and compact in size, that can easily fit into any implantable medical device. To avoid the harmful effect of radiation, the SAR value should be <1.6 W/kg. The SAR for this antenna is achieved at 0.362 W/kg in a very simple profile. Due to its compact size, the antenna can be easily mounted in a wireless portable device. The self- triplexing property of the device also enables full-duplex communication between different devices in a single antenna. This design suggestively simplifies the density of the RF front-end subsystem and leads to a simple and efficient communication system.

Abstract of the Research

Here, a compact design of antenna-multiplexer is engineered specifically to meet the stringent requirement imposed by intricate subsystems operating at 5.2, 5.5, and 5.8 GHz frequency bands for Internet of Medical Things (IoMT) applications. The proposed design includes a hexagonal-shaped substrate integrated waveguide (HSIW) cavity, tripole-shaped radiating slot, tuning vias, and three inset microstrip feedlines. A tripole-shaped slot is imprinted on the top of the SIW. This slot subdivides the cavity into trio-radiating segments and each segment offers a single frequency band. Further, the frequency bands are tuned at 5.2/5.5/5.8 GHz. The design maintains mutual port isolation better than 23.9 dB. Compared with the conventional tri-frequency antennas, the proposed design is highly compact and doesn’t need any additional circuitry to improve the port isolations. The measured results confirm the expected performance of the design. Furthermore, the proposed antenna is optimized within an implantable medical device (IMD) and simulated inside a realistic Human Head model at a depth of 3 mm and the Specific Absorption Rate (SAR) value is estimated. The SAR values are well below 0.362 W/Kg at the functioning bands due to the unidirectional radiation pattern from the antenna.

Her future research plan includes designing and developing a cost-effective bra-like prototype of Antenna-Array Sensors for breast cancer detection.

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The Department of Electronics and Communication Engineering is glad to announce that our PhD scholar, Mr Vasudeva Bevara and BTech students, Mr Shakamuri Narendra Chowdary and Mr Bolem Venkata Surendra Babu, published a paper titled ‘High performance 2n: 1: 2n Reversible MUX/DEMUX Architecture for Quantum-dot Cellular Automata’ in the international journal ‘Numerical Modelling: Electronic Networks, Devices and Fields (SCI Index)’ under the supervision of Dr Pradyut Kumar Sanki.

Abstract of the Research

Quantum-dot Cellular Automata (QCA) lead to fundamental changes in nanoscale technology. It promises small area, low power & high-speed structures for digital circuit design. This paper presents efficient low power structures of Reversible Multiplexer & Demultiplexer (RMD) modules based on the QCA technology. The simulation result shows that the proposed RMD modules have utilised less area & low power consumption. The simulation, layout & energy dissipation analysis of the proposed RMD module has been carried out using the QCA Designer-E simulation tool.

Essentially, CMOS is used as a well-known traditional technology in the design of the Very Large-Scale Integration (VLSI) circuits, which leads to the introduction of QCA as new nanotechnology to overcome the limitations of CMOS technology, such as material, physical, power, heat & economic challenges.

In reversible computation, the power dissipation occurs only when the computation is started or when the output is permanently stored. The reversible logic circuits are being investigated to prevent data loss in irreversible logic circuits. The reversible logic circuits provide zero loss of energy/information making the logic circuits the most suitable for QCA nanotechnologies. This has resulted in widespread interest in the design of reversible logic circuits based on QCA over the last few years.

In this paper, a modular 2n: 1 reversible multiplexer & 1: 2n reversible demultiplexer design in a single circuit is proposed. The 2:1 multiplexer & 1: 2 demultiplexer is realised in a single module i.e., 3 × 3 RMD. The 3 × 3 RMD is formed fundamental building block of the modular 2n: 1 reversible multiplexer & 1: 2n reversible demultiplexer design is extended to large RMD design.

Practical Implementations of the Research

This work can push forward research in the QCA domain and overcome the limitations of Complementary Metal Oxide Semiconductor (CMOS) technology. Soon the era of Beyond CMOS will start as the scaling of the current CMOS technology will reach the fundamental limit. QCA (Quantum-dot Cellular Automata) is the transistor less computation paradigm and viable candidate for Beyond CMOS device technology.

So, they have implemented the High Performance 2n: 1: 2n Reversible MUX/DEMUX Architecture for Quantum-dot Cellular Automata compared to other researcher works. In future, the research team would like to explore deeper into QCA technology and design efficient circuits which are small sized, with less cell count and less power consumption.

Once you are a part of SRM University-AP, we ensure that your future is secured! With the guidance of Dr Sujith Kalluri, Assistant Professor, Electronics and Communication Engineering, Mr Chanakya wends his way to Purdue University, USA, a world-renowned research university, for doing his PhD. He secured admission with a full tuition fee waiver and teaching assistantship. Chanakya Karra spent his two years DST-SERB JRF position at SRM AP and has made remarkable contributions to SRM-Amararaja Centre for Energy Storage Devices.

DST-SERB JRF position helped Chanakya resume his research career, which had a pause for over a year. “It fills me with immense joy to see the SRM-Amararaja Centre for Energy Storage Devices shape up with every possible equipment to conduct research on batteries. Kudos to the management and the efforts of the faculty associated with the centre,” says Mr Chanakya. He further mentioned that the research work conducted at SRM-Amara Raja Centre enabled him to write over three papers that catapulted his chances of admission.

“I would urge the students to make the best use of the opportunities available at SRM-AP and discuss their plans with the faculty. I am sure new avenues will open with the mentoring of world-class faculty at SRM”, says Mr Chanakya to the junior batches of students aspiring for a research career.

Mr Chanakya expressed his gratitude to the faculty members associated with Amararaja Centre for Energy Storage Devices- Dr Pardha Saradhi Maram, Associate Professor, Chemistry, Dr Surfarazhussain S Halkarni, Assistant Professor, Mechanical Engineering, Dr Laxmi Narayana Patro, Assistant Professor, Physics, and others.

Dr Sujith Kalluri from the Department of Electronics and Communication Engineering was honoured with the “ICTSGS Service Award for Sustainable Development Goals (SDGs)” in the recently held First International Conference on Technologies for Smart Green Connected Society 2021. The conference was jointly organised by the Electrochemical Society, USA, Yamagata University, Japan, and United Nations FAO, Italy. The award was presented for Dr Kalluri’s contributions in organising the international conference with the relevant audience. Dr Kalluri would further take up the role of Guest Editor in some of the prestigious peer-reviewed international journals.

The honour presented to Dr Kalluri further leads to research and professional collaboration with SPAST Foundation, Yamagata University Japan, and The Electrochemical Society USA.

The Department of Electronics and Communication Engineering could not be prouder as their student Sohith Chowdhary Akkineni turned out to be the next in the line of the lucky handful who has received admission offers from various world-class universities. Giving wings to the dreams of students makes the university a choice destination for next-generation where dreams are turned into reality.

With its priority being, teaching the students to dream big and facilitating their journey ahead, more students have found a place to initiate the primary strides towards a world of opportunities looming ahead. They bring laurels back to the university by placing its name on the global map. Sohith Chowdary has also reciprocated his love and respect for SRM University-AP by making the best use of the conducive learning atmosphere, experienced faculty, and cutting-edge infrastructure which opened the doors for higher studies abroad. He received admission offers from the University of Maryland, Northeastern University-Boston, George Washington University with a scholarship of 25% of the tuition fee, and Rochester Institute of Technology with yet another whopping scholarship of $15,561.

“I am indeed grateful to my HOD, Siva Sankar sir for giving me deeper insights into the course I have chosen, and to Swetha ma’am of International Relations Office for helping me get the necessary documents from the college. Besides, I would also like to thank all my professors, Sujith Kalluri sir, Gangi Reddy Salla sir, and Sateeshkrishna Dhuli sir for their Letters of Recommendation”, said Sohith. He also expressed his desire to start a career in the field of research in Telecommunication Networks.

As a word of advice to his juniors, Sohith said, “Choose a course that interests you, rather than following everyone else, do research in the course you have chosen, and apply to international universities preferably before the priority deadline”. With the number of students enrolling into international universities rising, SRM University-AP continues to build a legacy of its own in the domain of global education.

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