Phase-Controlled Bidirectional Circularly Polarized Dual 4-Port SIW MIMO Antenna with Enhanced Isolation for Sub-6 GHz Vehicular Communications Kamepalli Dharani, M. Sujatha, Samineni Peddakrishna, Jayendra Kumar Electronics Switzerland, 2026 This paper presents a dual four-port circularly polarized (CP) MIMO antenna based on substrate integrated waveguide (SIW) technology for sub-6 GHz applications. The design consists of two identical four-port SIW-based CP-MIMO antennas arranged in a mirror-symmetric configuration with an air gap of 15 mm. Each antenna employs four symmetrically arranged cross-shaped SIW patches excited by coaxial probes. Bidirectional radiation is achieved by applying a 180° phase difference between corresponding ports of the mirror symmetric configuration, referred to as the Backward-Radiating Unit (BRU) and the Forward-Radiating Unit (FRU). The bidirectional radiation mechanism is supported by array-factor-based theoretical modelling, which explains the constructive and destructive interference under phase-controlled excitation. To ensure high isolation and stable polarization performance, the antenna design incorporates defected ground structures, inter-element decoupling strips, and vertical metallic vias. Simulations indicate an operating band from 5.1 to 5.4 GHz. Measurements show a −10 dB bandwidth from 5.25 to 5.55 GHz, with the frequency shift attributed to fabrication tolerances and measurement uncertainties. The antenna achieves inter-port isolation better than −15 dB. A 3 dB axial-ratio bandwidth is maintained across the operating band. Measured axial-ratio values remain below 3 dB from 5.25 to 5.55 GHz, while simulations predict a corresponding range from 5.1 to 5.4 GHz. The proposed configuration achieves a peak gain exceeding 4 dBi and maintains an envelope correlation coefficient below 0.05. These results confirm its suitability for CP-MIMO systems with controlled spatial coverage. With a physical size of 0.733λ0 × 0.733λ0 per array, the proposed antenna is well-suited for vehicular and space-constrained wireless systems requiring bidirectional CP-MIMO coverage.
GREEN HOUSE CULTIVATION USING ROBOT NAVIGATION SYSTEMS WITH A MODULE FOR IDENTIFYING PESTS AND DISEASES Journal of Environmental Protection and Ecology, 2025
Smart Clinic: A New Innovation in Telemedicine Nivedha.D, S. Nagarajan, C.Rohith Bhat, M.Sujatha, M.Moorthi, et al. Proceedings of the 6th International Conference on Smart Electronics and Communication Icosec 2025, 2025
DEVELOPMENT AND ANALYSIS OF A NOVEL NONLINEAR OPTICAL CRYSTAL: MAGNESIUM L-TARTRATE CHLORIDE (MLTC) FOR ENHANCED PHOTONIC APPLICATIONS Journal of Environmental Protection and Ecology, 2024
Graphene-Integrated Square-Ring and Thin-Wire Resonator SPR Biosensor for Enhanced Adrenal Cancer Detection: Althobaiti, Alshardan, Sujatha, Arasi, Alamri, Jayasankar, and … T Althobaiti, A Alshardan, M Sujatha, MA Arasi, MZ Alamri, T Jayasankar, ... Journal of Electronic Materials 55 (3), 2673-2688 , 2026 2026
Phase-Controlled Bidirectional Circularly Polarized Dual 4-Port SIW MIMO Antenna with Enhanced Isolation for Sub-6 GHz Vehicular Communications K Dharani, M Sujatha, S Peddakrishna, J Kumar Electronics 15 (3), 539 , 2026 2026 Citations: 3
Rapid differentiation of Dalbergia latifolia and Dalbergia sissoo wood using thin layer chromatography for CITES compliance R Kumar, R Sharma, M Sujatha, K Bhadoriya Microchemical Journal, 115599 , 2025 2025
Assessment of flood vulnerability in a coastal metropolitan city for sustainable environmental using machine learning methods R Alabdan, C Sharmila, N Alruwais, HM Alshahrani, S Anbukkarasi, ... Scientific Reports 15 (1), 24796 , 2025 2025 Citations: 6
Forecasting coastal stability: Digital shoreline analysis system and machine learning techniques in evaluating Impacts of cyclones A Ramachandran, M Sujatha, N Alruwais, HM Alshahrani Regional Studies in Marine Science 81, 103961 , 2025 2025 Citations: 9
Automated System for Identifying Marine Floating Plastics to Enhance Sustainability in Coastal Environments Through Sentinel-2 Imagery and Machine Learning Models S Venkatraman, SS Begum, K Nithya, M Sujatha, T Jayasankar, ... Ocean Science Journal 59 (4), 56 , 2024 2024 Citations: 3
Optimal fuzzy deep neural networks-based plant disease detection and classification on UAV-based remote sensed data M Pajany, S Venkatraman, U Sakthi, M Sujatha, MK Ishak IEEE Access 12, 162131-162144 , 2024 2024 Citations: 21
Prediction of moment capacity of ferrocement composites with chicken mesh and steel slag using response surface methodology and artificial neural network R Maguteeswaran, J Sridhar, R Gangadevi, N Malathi, M Sujatha, ... Matéria (Rio de Janeiro) 29 (2), e20230364 , 2024 2024 Citations: 5
Assessment of cyclone risk and case study of Gaja cyclone using GIS techniques and machine learning algorithms in coastal zone of Tamil Nadu, India M Thenmozhi, M Sujatha, M Kavitha, S Senthilraja, M Babu, V Priya Environmental Research 246, 118089 , 2024 2024 Citations: 11
Assessment of urban heat island using remote sensing and geospatial application: A case study in Sao Paulo city, Brazil, South America S Venkatraman, V Kandasamy, J Rajalakshmi, S Sabarunisha Begum, ... Journal of South American Earth Sciences 134, 104763 , 2024 2024 Citations: 23
A Circular Patch Antenna with Bottleneck feed and DGS for C-Band and X-Band Applications KR Rao, M Sujatha, MS Anuradha, RR Reddy 2023 IEEE Wireless Antenna and Microwave Symposium (WAMS), 1-5 , 2023 2023
Dual-Sense Polarized Dielectric Resonator Antenna with Metamaterial as Superstrate M Sujatha, MS Anuradha, RR Reddy, A Kalepu 2023 IEEE Wireless Antenna and Microwave Symposium (WAMS), 1-3 , 2023 2023
OCR Based Number Plate Recognition Using LabVIEW D Jahnavi, D Lavanya, M Sujatha International Conference on Innovative Computing and Communications … , 2022 2022 Citations: 3
Investigating Rotor Conditions on Wind Turbines Using Integrating Tree Classifiers VS Bikash Chandra Saha, Joshuva Arockia Dhanraj, M. Sujatha,R. Vallikannu ... International Journal of Photo energy 2022 (1), 1-14 , 2022 2022
Grid Search for Predicting Coronary Heart Disease by Tuning Hyper-Parameters CNSR S. Prabu,* , B. Thiyaneswaran , M. Sujatha Computer Systems Science and Engineering 43 (2), 737-749 , 2022 2022 Citations: 49
AI Based Traffic Flow Prediction Model for Connected and Autonomous Electric Vehicles IVPDAP P. Thamizhazhagan,*, M. Sujatha, S. Umadevi , K. Priyadarshini Computers, Materials & Continua 70 (2), 3333-3347 , 2021 2021 Citations: 14
Perspectives of convertors and communication aspects in automated vehicles, part 2: Printed antennas and sensors for automotive radars NK Darimireddy, U Mohan Rao, CW Park, I Fofana, M Sujatha, AK Verma Energies 14 (6), 1656 , 2021 2021 Citations: 8
Circularly-Polarized Circular Meandered Microstrip Antennas for WLAN Applications NK Darimireddy, BRS Reddy, CW Park, M Sujatha 2020 International Symposium on Antennas and Propagation (ISAP), 183-184 , 2021 2021 Citations: 2
Perspectives of Convertors and Communication Aspects in Automated Vehicles, Part 2: Printed Antennas and Sensors for Automotive Radars. Energies 2021, 14, 1656 NK Darimireddy, U Mohan Rao, CW Park, I Fofana, M Sujatha, AK Verma s Note: MDPI stays neutral with regard to jurisdictional claims in published … , 2021 2021
Classification of standard oral cancer using textural analysis and hybrid Hopfield neural networks KVB Sujatha, D Nageswari, G Geethamahalakshmi, T Jayasankar Turkish J. Physiother. Rehabil. 32 (2), 2811-2819 , 2021 2021 Citations: 5
MOST CITED SCHOLAR PUBLICATIONS
Grid Search for Predicting Coronary Heart Disease by Tuning Hyper-Parameters CNSR S. Prabu,* , B. Thiyaneswaran , M. Sujatha Computer Systems Science and Engineering 43 (2), 737-749 , 2022 2022 Citations: 49
Correlation of plasma nitrite/nitrate levels and inducible nitric oxide gene expression among women with cervical abnormalities and cancer AP Sowjanya, M Rao, H Vedantham, B Kalpana, UR Poli, MA Marks, ... Nitric Oxide 52, 21-28 , 2016 2016 Citations: 28
Assessment of urban heat island using remote sensing and geospatial application: A case study in Sao Paulo city, Brazil, South America S Venkatraman, V Kandasamy, J Rajalakshmi, S Sabarunisha Begum, ... Journal of South American Earth Sciences 134, 104763 , 2024 2024 Citations: 23
Optimal fuzzy deep neural networks-based plant disease detection and classification on UAV-based remote sensed data M Pajany, S Venkatraman, U Sakthi, M Sujatha, MK Ishak IEEE Access 12, 162131-162144 , 2024 2024 Citations: 21
Implementation of Energy Efficient gates using Adiabatic Logic for Low Power Applications MS 24. Anitha, S.Rooban International Journal of Recent Technology and Engineering (IJRTE), 8 (3) , 2019 2019 Citations: 18
Design of a single band microstrip patch antenna for 5G applications RS Chandana, PS Deepthi, DS Teja, N JayaKrishna, M Sujatha International Journal of Engineering & Technology 7 (2.7), 532-535 , 2018 2018 Citations: 15
AI Based Traffic Flow Prediction Model for Connected and Autonomous Electric Vehicles IVPDAP P. Thamizhazhagan,*, M. Sujatha, S. Umadevi , K. Priyadarshini Computers, Materials & Continua 70 (2), 3333-3347 , 2021 2021 Citations: 14
Metamaterial Inspired Circular Antenna with DGS for Tetra Band Application JC 4. N .Ramya, M.Sujatha, T.Jayasankar Prasad International Journal of Control and Automation 13 (2), . 877 – 882. , 2020 2020 Citations: 13
Assessment of cyclone risk and case study of Gaja cyclone using GIS techniques and machine learning algorithms in coastal zone of Tamil Nadu, India M Thenmozhi, M Sujatha, M Kavitha, S Senthilraja, M Babu, V Priya Environmental Research 246, 118089 , 2024 2024 Citations: 11
Forecasting coastal stability: Digital shoreline analysis system and machine learning techniques in evaluating Impacts of cyclones A Ramachandran, M Sujatha, N Alruwais, HM Alshahrani Regional Studies in Marine Science 81, 103961 , 2025 2025 Citations: 9
Design of Reconfigurable Integrated patch antenna in ISM band for IoT applications PK Devi, M Sujatha, JA Prasath 2020 7th international conference on smart structures and systems (ICSSS), 1-4 , 2020 2020 Citations: 9
Minkowski inter-digital dual-band pass fractal filter for GSM applications M Sujatha, NK Darimireddy, RR Reddy, B Sridhar 2019 IEEE Indian Conference on Antennas and Propogation (InCAP), 1-4 , 2019 2019 Citations: 9
Perspectives of convertors and communication aspects in automated vehicles, part 2: Printed antennas and sensors for automotive radars NK Darimireddy, U Mohan Rao, CW Park, I Fofana, M Sujatha, AK Verma Energies 14 (6), 1656 , 2021 2021 Citations: 8
AR-ESIHE and ARS-ESIHE-based image enhancement methods on 9oba pure and nano dispersed liquid crystalline compound R Srilekha, G., Madhav, B.T.P., Sujatha, M., ...Manepalli, R.K.N.R. Molecular Crystals and Liquid Crystals 702 (1), 1-20 , 2020 2020 Citations: 8
Circularly polarized compact wideband slotted cylindrical dielectric resonator antennas M Sujatha, RR Reddy, NK Darimireddy 2017 IEEE International Conference on Antenna Innovations & Modern … , 2017 2017 Citations: 8
Assessment of flood vulnerability in a coastal metropolitan city for sustainable environmental using machine learning methods R Alabdan, C Sharmila, N Alruwais, HM Alshahrani, S Anbukkarasi, ... Scientific Reports 15 (1), 24796 , 2025 2025 Citations: 6
DESIGN AND IMPLEMENTATION OF LABVIEW BASED BOREWELL CHILD RESCUE ROBOT RSK M.Sujatha,N.Prabhakaran International Journal of Engineering and Technology 7, 157-160 , 2018 2018 Citations: 6
ROAC: RECURSIVE OPTIMIZATION OF ANT COLONY ASSISTED PERTURB AND OBSERVE FOR A PHOTO VOLTAIC RESONANT BOOST CONVERTER SPK R.Selvakumar,M.Sujatha International Journal of Engineering and Technology 7, 150-156 , 2018 2018 Citations: 6
Design and investigation of terahertz antenna using different configurations N Anusha, M Sujatha, V Srikanth, RS Kumar, TJV Varma 2017 International conference of Electronics, Communication and Aerospace … , 2017 2017 Citations: 6
Prediction of moment capacity of ferrocement composites with chicken mesh and steel slag using response surface methodology and artificial neural network R Maguteeswaran, J Sridhar, R Gangadevi, N Malathi, M Sujatha, ... Matéria (Rio de Janeiro) 29 (2), e20230364 , 2024 2024 Citations: 5
