Dr. Dilip Kumar Choudhary received the Ph.D. in Electronics Engineering from Indian Institute of Technology (ISM) Dhanbad, India in 2020. Currently he is working as Assistant Professor in the School of Electronics Engineering, Vellore Institute of Technology, Vellore, India. His current research interests include Microwave Filtering Circuits, Metamaterial, and their applications, Microwave filters, Antenna, MIMO Antenna, Absorber, Power dividers, and Coupler for wireless communication.Dr. Naveen Mishra was born in Deoria, India, in 1990. He received the B.Tech. degree in Electronics and Communication Engineering from Uttar Pradesh Technical University, Lucknow, in 2010. He completed his Ph.D. degree with the Department of Electronics Engineering, IIT (Indian School of Mines) Dhanbad, India. He joined the Department of Electronics Engineering, IIT (Indian School of Mines) Dhanbad, in Jan. 2014, as a Junior Research Fellow, where he worked as a Senior Research Fellow, from Jan. 2016 to April 2019. He is currently working as an Assistant Professor with the Department of Electronics Engineering, School of Electronics Engineering, Vellore Institute of Technology, Vellore, Tamilnadu, India. He joined VIT University in May 2019.Dr. Indrasen Singh is an Assistant Professor in the school of Electronics Engineering at Vellore Institute of Technology, Vellore, Tamil Nadu, India. He received his B. Tech. and M. Tech. Degree in Electronics and Communication Engineering from Uttar Pradesh Technical University, Lucknow, India in 2006, and 2010, respectively. He obtained his PhD degree in Electronics and Communication Engineering from National Institute of Technology Kurukshetra, Haryana, India in 2019. His research interests are in the area of cooperative communication, stochastic geometry, modeling of wireless networks, heterogeneous networks, millimeter wave communications, Device-to-Device communication, and 5G/6G communication.Dr. Naser Ojaroudi Parchin is a Senior Member of IEEE. He received the Ph.D. degree in electrical engineering from the University of Bradford, U.K. He is currently an Assistant Professor at Edinburgh Napier University, U.K. He was a Postdoctoral Research Assistant at the Faculty of Engineering and Informatics, University of Bradford. He worked as a Research Fellow in the SATNNEX V Project, funded by the European Space Agency. From 2018 to 2020, he was a Marie Curie Research Fellow in the H2020-ITN-SECRET Project, funded by EU Commission, targeting 5G mobile small cells. From 2014 to 2018, he worked with the APMS Section, Aalborg University, Denmark. In 2016, he was a Visiting Researcher at Ankara University, Turkey. He has over 12 years of research experience in antennas and microwave engineering. His research interests include phased arrays, MIMO systems, smartphone antennas, SAR/user-impact, full-duplex diversity, 5G antennas, implementable and biomedical sensors, RFID tag antennas, millimeter-wave and terahertz components, fractal structures, metamaterials/ metasurfaces, PCB realization, Fabry resonators, EBG/FSS-inspired radiators, microwave filters, reconfigurable structures, and wireless propagation.Prof. Ghanshyam Singh received a PhD degree in Electronics Engineering from the Indian Institute of Technology, Banaras Hindu University, Varanasi, India, in 2000. He was associated with the Central Electronics Engineering Research Institute, Pilani, and Institute for Plasma Research, Gandhinagar, India, where he was Research Scientist. He had also worked as an Assistant Professor at the Electronics and Communication Engineering Department, Nirma University of Science and Technology, Ahmedabad, India. He was a Visiting Researcher at the Seoul National University, Seoul, South Korea. He also worked as Assistant Professor, Associate Professor and Full Professor in the Department of Electronics and Communication Engineering at the Jaypee University of Information Technology, Solan, India. At present, he is a full Professor with the Department of Electrical and Electronics Engineering, APK Campus, University of Johannesburg, South Africa. He is an author/co-author of more than 250 scientific papers of the refereed Journal and International Conferences. His research and teaching interests include RF/Microwave Engineering, Millimeter/THz Wave Antennas and its Applications in Communication and Imaging, Next-Generation Communication Systems (OFDM and Cognitive Radio), and Nanophotonics. He has more than 19 years of teaching and research experience in the area of Electromagnetic/Microwave Engineering, Wireless Communication and Nanophotonics. He has supervised 14 Ph. D. and 45 M. Tech. Theses. He has worked as a reviewer for several reputed Journals and Conferences. He is the author of four books published by Springer.

• Chapter 1- Design and Analysis of UWB Patch Antenna for 5G Millimeter Wave ApplicationsChapter 2- Material Characterization of Graphene Based Circular Patch Terahertz (THz) Antenna for Biomedical Applications Chapter 3- Various Mutual Coupling Reduction Techniques for 5G MIMO AntennaChapter 4- Design and Simulation study of Bi-frequency and Dual-band Magnetically Insulated Line Oscillator (MILO)Chapter 5- Microwave and Millimeter-Wave Radar Imaging: Challenges and ApplicationsChapter 6- High Isolation and Low RCS Tuneable Wide Band Graphene Based THz MIMO Antenna for Nano Communication with 6G/IOT ApplicationChapter 7- Frequency Selective Surfaces/Metasurfaces: Equivalent Circuit ModellingChapter 8- Miniaturized X-band DMTL Phase Shifter using Space-Filling CurvesChapter 9- Microwave Devices and Circuits for Advance Wireless Communication: Design and AnalysisChapter 10- Design of a mmWave Reconfigurable Intelligent Surface for Futuristic Wireless CommunicationsChapter 11- Design of Four Element Multi-Band MIMO Antenna for 6G mmWave Wireless Applications Chapter 12- Intelligent reflecting surface assisted D2D communication at mm-Wave bandChapter 13- Machine Learning for Advanced Wireless Communication: Applications, Challenges, Problems, and Open Research QuestionsChapter 14- Estimation of Channel for Multipath Transmission in Wireless Communication using OFDMChapter 15- Industrial IoT: Challenges and ApplicationsChapter 16- Establishing Seamless Connectivity through UAV Communication Systems

Dr. Dilip Kumar Choudhary received the Ph.D. in Electronics Engineering from Indian Institute of Technology (ISM) Dhanbad, India in 2020. Currently he is working as Assistant Professor in the School of Electronics Engineering, Vellore Institute of Technology, Vellore, India. His current research interests include Microwave Filtering Circuits, Metamaterial, and their applications, Microwave filters, Antenna, MIMO Antenna, Absorber, Power dividers, and Coupler for wireless communication.Dr. Naveen Mishra was born in Deoria, India, in 1990. He received the B.Tech. degree in Electronics and Communication Engineering from Uttar Pradesh Technical University, Lucknow, in 2010. He completed his Ph.D. degree with the Department of Electronics Engineering, IIT (Indian School of Mines) Dhanbad, India. He joined the Department of Electronics Engineering, IIT (Indian School of Mines) Dhanbad, in Jan. 2014, as a Junior Research Fellow, where he worked as a Senior Research Fellow, from Jan. 2016 to April 2019. He is currently working as an Assistant Professor with the Department of Electronics Engineering, School of Electronics Engineering, Vellore Institute of Technology, Vellore, Tamilnadu, India. He joined VIT University in May 2019.Dr. Indrasen Singh is an Assistant Professor in the school of Electronics Engineering at Vellore Institute of Technology, Vellore, Tamil Nadu, India. He received his B. Tech. and M. Tech. Degree in Electronics and Communication Engineering from Uttar Pradesh Technical University, Lucknow, India in 2006, and 2010, respectively. He obtained his PhD degree in Electronics and Communication Engineering from National Institute of Technology Kurukshetra, Haryana, India in 2019. His research interests are in the area of cooperative communication, stochastic geometry, modeling of wireless networks, heterogeneous networks, millimeter wave communications, Device-to-Device communication, and 5G/6G communication.Dr. Naser Ojaroudi Parchin is a Senior Member of IEEE. He received the Ph.D. degree in electrical engineering from the University of Bradford, U.K. He is currently an Assistant Professor at Edinburgh Napier University, U.K. He was a Postdoctoral Research Assistant at the Faculty of Engineering and Informatics, University of Bradford. He worked as a Research Fellow in the SATNNEX V Project, funded by the European Space Agency. From 2018 to 2020, he was a Marie Curie Research Fellow in the H2020-ITN-SECRET Project, funded by EU Commission, targeting 5G mobile small cells. From 2014 to 2018, he worked with the APMS Section, Aalborg University, Denmark. In 2016, he was a Visiting Researcher at Ankara University, Turkey. He has over 12 years of research experience in antennas and microwave engineering. His research interests include phased arrays, MIMO systems, smartphone antennas, SAR/user-impact, full-duplex diversity, 5G antennas, implementable and biomedical sensors, RFID tag antennas, millimeter-wave and terahertz components, fractal structures, metamaterials/ metasurfaces, PCB realization, Fabry resonators, EBG/FSS-inspired radiators, microwave filters, reconfigurable structures, and wireless propagation.Prof. Ghanshyam Singh received a PhD degree in Electronics Engineering from the Indian Institute of Technology, Banaras Hindu University, Varanasi, India, in 2000. He was associated with the Central Electronics Engineering Research Institute, Pilani, and Institute for Plasma Research, Gandhinagar, India, where he was Research Scientist. He had also worked as an Assistant Professor at the Electronics and Communication Engineering Department, Nirma University of Science and Technology, Ahmedabad, India. He was a Visiting Researcher at the Seoul National University, Seoul, South Korea. He also worked as Assistant Professor, Associate Professor and Full Professor in the Department of Electronics and Communication Engineering at the Jaypee University of Information Technology, Solan, India. At present, he is a full Professor with the Department of Electrical and Electronics Engineering, APK Campus, University of Johannesburg, South Africa. He is an author/co-author of more than 250 scientific papers of the refereed Journal and International Conferences. His research and teaching interests include RF/Microwave Engineering, Millimeter/THz Wave Antennas and its Applications in Communication and Imaging, Next-Generation Communication Systems (OFDM and Cognitive Radio), and Nanophotonics. He has more than 19 years of teaching and research experience in the area of Electromagnetic/Microwave Engineering, Wireless Communication and Nanophotonics. He has supervised 14 Ph. D. and 45 M. Tech. Theses. He has worked as a reviewer for several reputed Journals and Conferences. He is the author of four books published by Springer.

• Chapter 1- Design and Analysis of UWB Patch Antenna for 5G Millimeter Wave ApplicationsChapter 2- Material Characterization of Graphene Based Circular Patch Terahertz (THz) Antenna for Biomedical Applications Chapter 3- Various Mutual Coupling Reduction Techniques for 5G MIMO AntennaChapter 4- Design and Simulation study of Bi-frequency and Dual-band Magnetically Insulated Line Oscillator (MILO)Chapter 5- Microwave and Millimeter-Wave Radar Imaging: Challenges and ApplicationsChapter 6- High Isolation and Low RCS Tuneable Wide Band Graphene Based THz MIMO Antenna for Nano Communication with 6G/IOT ApplicationChapter 7- Frequency Selective Surfaces/Metasurfaces: Equivalent Circuit ModellingChapter 8- Miniaturized X-band DMTL Phase Shifter using Space-Filling CurvesChapter 9- Microwave Devices and Circuits for Advance Wireless Communication: Design and AnalysisChapter 10- Design of a mmWave Reconfigurable Intelligent Surface for Futuristic Wireless CommunicationsChapter 11- Design of Four Element Multi-Band MIMO Antenna for 6G mmWave Wireless Applications Chapter 12- Intelligent reflecting surface assisted D2D communication at mm-Wave bandChapter 13- Machine Learning for Advanced Wireless Communication: Applications, Challenges, Problems, and Open Research QuestionsChapter 14- Estimation of Channel for Multipath Transmission in Wireless Communication using OFDMChapter 15- Industrial IoT: Challenges and ApplicationsChapter 16- Establishing Seamless Connectivity through UAV Communication Systems

Dr. Dilip Kumar Choudhary received the Ph.D. in Electronics Engineering from Indian Institute of Technology (ISM) Dhanbad, India in 2020. Currently he is working as Assistant Professor in the School of Electronics Engineering, Vellore Institute of Technology, Vellore, India. His current research interests include Microwave Filtering Circuits, Metamaterial, and their applications, Microwave filters, Antenna, MIMO Antenna, Absorber, Power dividers, and Coupler for wireless communication.Dr. Naveen Mishra was born in Deoria, India, in 1990. He received the B.Tech. degree in Electronics and Communication Engineering from Uttar Pradesh Technical University, Lucknow, in 2010. He completed his Ph.D. degree with the Department of Electronics Engineering, IIT (Indian School of Mines) Dhanbad, India. He joined the Department of Electronics Engineering, IIT (Indian School of Mines) Dhanbad, in Jan. 2014, as a Junior Research Fellow, where he worked as a Senior Research Fellow, from Jan. 2016 to April 2019. He is currently working as an Assistant Professor with the Department of Electronics Engineering, School of Electronics Engineering, Vellore Institute of Technology, Vellore, Tamilnadu, India. He joined VIT University in May 2019.Dr. Indrasen Singh is an Assistant Professor in the school of Electronics Engineering at Vellore Institute of Technology, Vellore, Tamil Nadu, India. He received his B. Tech. and M. Tech. Degree in Electronics and Communication Engineering from Uttar Pradesh Technical University, Lucknow, India in 2006, and 2010, respectively. He obtained his PhD degree in Electronics and Communication Engineering from National Institute of Technology Kurukshetra, Haryana, India in 2019. His research interests are in the area of cooperative communication, stochastic geometry, modeling of wireless networks, heterogeneous networks, millimeter wave communications, Device-to-Device communication, and 5G/6G communication.Dr. Naser Ojaroudi Parchin is a Senior Member of IEEE. He received the Ph.D. degree in electrical engineering from the University of Bradford, U.K. He is currently an Assistant Professor at Edinburgh Napier University, U.K. He was a Postdoctoral Research Assistant at the Faculty of Engineering and Informatics, University of Bradford. He worked as a Research Fellow in the SATNNEX V Project, funded by the European Space Agency. From 2018 to 2020, he was a Marie Curie Research Fellow in the H2020-ITN-SECRET Project, funded by EU Commission, targeting 5G mobile small cells. From 2014 to 2018, he worked with the APMS Section, Aalborg University, Denmark. In 2016, he was a Visiting Researcher at Ankara University, Turkey. He has over 12 years of research experience in antennas and microwave engineering. His research interests include phased arrays, MIMO systems, smartphone antennas, SAR/user-impact, full-duplex diversity, 5G antennas, implementable and biomedical sensors, RFID tag antennas, millimeter-wave and terahertz components, fractal structures, metamaterials/ metasurfaces, PCB realization, Fabry resonators, EBG/FSS-inspired radiators, microwave filters, reconfigurable structures, and wireless propagation.Prof. Ghanshyam Singh received a PhD degree in Electronics Engineering from the Indian Institute of Technology, Banaras Hindu University, Varanasi, India, in 2000. He was associated with the Central Electronics Engineering Research Institute, Pilani, and Institute for Plasma Research, Gandhinagar, India, where he was Research Scientist. He had also worked as an Assistant Professor at the Electronics and Communication Engineering Department, Nirma University of Science and Technology, Ahmedabad, India. He was a Visiting Researcher at the Seoul National University, Seoul, South Korea. He also worked as Assistant Professor, Associate Professor and Full Professor in the Department of Electronics and Communication Engineering at the Jaypee University of Information Technology, Solan, India. At present, he is a full Professor with the Department of Electrical and Electronics Engineering, APK Campus, University of Johannesburg, South Africa. He is an author/co-author of more than 250 scientific papers of the refereed Journal and International Conferences. His research and teaching interests include RF/Microwave Engineering, Millimeter/THz Wave Antennas and its Applications in Communication and Imaging, Next-Generation Communication Systems (OFDM and Cognitive Radio), and Nanophotonics. He has more than 19 years of teaching and research experience in the area of Electromagnetic/Microwave Engineering, Wireless Communication and Nanophotonics. He has supervised 14 Ph. D. and 45 M. Tech. Theses. He has worked as a reviewer for several reputed Journals and Conferences. He is the author of four books published by Springer.

• Chapter 1- Design and Analysis of UWB Patch Antenna for 5G Millimeter Wave ApplicationsChapter 2- Material Characterization of Graphene Based Circular Patch Terahertz (THz) Antenna for Biomedical Applications Chapter 3- Various Mutual Coupling Reduction Techniques for 5G MIMO AntennaChapter 4- Design and Simulation study of Bi-frequency and Dual-band Magnetically Insulated Line Oscillator (MILO)Chapter 5- Microwave and Millimeter-Wave Radar Imaging: Challenges and ApplicationsChapter 6- High Isolation and Low RCS Tuneable Wide Band Graphene Based THz MIMO Antenna for Nano Communication with 6G/IOT ApplicationChapter 7- Frequency Selective Surfaces/Metasurfaces: Equivalent Circuit ModellingChapter 8- Miniaturized X-band DMTL Phase Shifter using Space-Filling CurvesChapter 9- Microwave Devices and Circuits for Advance Wireless Communication: Design and AnalysisChapter 10- Design of a mmWave Reconfigurable Intelligent Surface for Futuristic Wireless CommunicationsChapter 11- Design of Four Element Multi-Band MIMO Antenna for 6G mmWave Wireless Applications Chapter 12- Intelligent reflecting surface assisted D2D communication at mm-Wave bandChapter 13- Machine Learning for Advanced Wireless Communication: Applications, Challenges, Problems, and Open Research QuestionsChapter 14- Estimation of Channel for Multipath Transmission in Wireless Communication using OFDMChapter 15- Industrial IoT: Challenges and ApplicationsChapter 16- Establishing Seamless Connectivity through UAV Communication Systems