Subal Kar – författare

Physics and Astrophysics—Glimpses of the Progress provides a comprehensive account of physics and astrophysics from the time of Aristotle to the modern era of Stephen Hawking and beyond. It takes the readers of all ages through a pleasant journey touching on the major discoveries and inventions that have taken place in both the macro-world, including that in the cosmos, and the micro-world of atomic and subatomic particles related to physics and astrophysics. Use of historical perspective and anecdote makes the storytelling on the progress of physics and astrophysics both interesting and absorbing. While peering through different developments in these fields, the book never compromises with the sanctity of the scientific content, including the depth and beauty of the physical concept of the topics concerned and the philosophical viewpoints they represent. Where appropriate, the book also delves into value judgments of life that affect our civilization.Features The intricate concepts of physics and astrophysics are explained in simple terms and in easy-to-understand language. Physics and astrophysics are discussed in a connected and correlated way in a single volume of comprehensive size but in totality, which to date is the unique feature of this book. Starting with Aristotle’s Physics and going through the work of Newton, Einstein, Schrödinger, Hubble, Hewish, Hawking, and others, including the present research on dark energy, dark matter, and the fifth force of nature, the reader will be kept absorbed and spellbound. In addition to the fundamental principles of Newtonian mechanics, Einstein’s relativity, quantum mechanics, string theory, loop quantum gravity, and so on, the cutting-edge technologies of recent times, such as the Large Hadron Collider, Laser Interferometer Gravitational-wave Observatory, and Event Horizon Telescope, are also explored.The book is aimed primarily at undergraduate and graduate students, researchers, and professionals studying physics and astrophysics. General readers will also find the book useful to quench their thirst for knowledge about the developments in physics and astrophysics.

Physics and Astrophysics—Glimpses of the Progress provides a comprehensive account of physics and astrophysics from the time of Aristotle to the modern era of Stephen Hawking and beyond. It takes the readers of all ages through a pleasant journey touching on the major discoveries and inventions that have taken place in both the macro-world, including that in the cosmos, and the micro-world of atomic and subatomic particles related to physics and astrophysics. Use of historical perspective and anecdote makes the storytelling on the progress of physics and astrophysics both interesting and absorbing. While peering through different developments in these fields, the book never compromises with the sanctity of the scientific content, including the depth and beauty of the physical concept of the topics concerned and the philosophical viewpoints they represent. Where appropriate, the book also delves into value judgments of life that affect our civilization.Features The intricate concepts of physics and astrophysics are explained in simple terms and in easy-to-understand language. Physics and astrophysics are discussed in a connected and correlated way in a single volume of comprehensive size but in totality, which to date is the unique feature of this book. Starting with Aristotle’s Physics and going through the work of Newton, Einstein, Schrödinger, Hubble, Hewish, Hawking, and others, including the present research on dark energy, dark matter, and the fifth force of nature, the reader will be kept absorbed and spellbound. In addition to the fundamental principles of Newtonian mechanics, Einstein’s relativity, quantum mechanics, string theory, loop quantum gravity, and so on, the cutting-edge technologies of recent times, such as the Large Hadron Collider, Laser Interferometer Gravitational-wave Observatory, and Event Horizon Telescope, are also explored.The book is aimed primarily at undergraduate and graduate students, researchers, and professionals studying physics and astrophysics. General readers will also find the book useful to quench their thirst for knowledge about the developments in physics and astrophysics.

The text contains all the essential elements of communication principles, devices, circuits, antennas, and systems covering the electromagnetic spectrum from KHz to MHz of radio frequency (RF) that was developed in the formative stage of wireless technology. Also, the digital revolution, that has changed the landscape of modern electronics for wireless technology, has been discussed emphasizing the fundamentals including digital computers. The presentation of the book is in a concise yet complete way and stresses the physical and technical aspects with application viewpoints but using minimum possible mathematics.The book:Discusses the historical background of different developments of wireless technology from KHz to MHz and going through the GHz to THz in due perspective to provide a holistic view of the development of wireless technology from its inception to contemporary times.Contains in brief the basic concepts of electromagnetism like Maxwell’s wave equation, evanescent waves, surface waves, plasmonic waves that are used in wireless technology in some form or the other.Highlights the need for modulation and covers various modulation techniques such as continuous wave and pulse analogue modulation and modulation/demodulation systems that were developed in the formative stage of the development of wireless technology in the RF frequency range of KHz to MHz.Discusses the physical concepts and application view-points of active devices, RF transmission lines, antennas and systems used at KHz to MHz frequency domain of wireless technology.Covers the digital revolution that has changed the wholesale electronic systems of modern wireless technology, and the development of digital computers has also been discussed with a brief overview of laptops, supercomputers, and upcoming quantum computers.This overall scenario of historical perspective of wireless technology from KHz to THz and technical developments from KHz to MHz in the RF domain during the formative stage of development of wireless technology including fundamental developments related to digital revolution is expected to attract the interest of the entry level students, research scholars, professionals, and even the general readers alike with a new vision to have a quick yet in-depth glimpse of the progress of wireless technology since its inception till today. It is primarily written for junior undergraduate students in the fields of electrical engineering, electronics and communication engineering, wireless communication, telecommunication, and computer engineering. Research scholars and professionals can also refresh their idea of the developments of wireless technology during its formative stage and can get a flavour of the route to modern developments that have taken place henceforth.

The text contains all the essential elements of communication principles, devices, circuits, antennas, and systems covering the electromagnetic spectrum from KHz to MHz of radio frequency (RF) that was developed in the formative stage of wireless technology. Also, the digital revolution, that has changed the landscape of modern electronics for wireless technology, has been discussed emphasizing the fundamentals including digital computers. The presentation of the book is in a concise yet complete way and stresses the physical and technical aspects with application viewpoints but using minimum possible mathematics.The book:Discusses the historical background of different developments of wireless technology from KHz to MHz and going through the GHz to THz in due perspective to provide a holistic view of the development of wireless technology from its inception to contemporary times.Contains in brief the basic concepts of electromagnetism like Maxwell’s wave equation, evanescent waves, surface waves, plasmonic waves that are used in wireless technology in some form or the other.Highlights the need for modulation and covers various modulation techniques such as continuous wave and pulse analogue modulation and modulation/demodulation systems that were developed in the formative stage of the development of wireless technology in the RF frequency range of KHz to MHz.Discusses the physical concepts and application view-points of active devices, RF transmission lines, antennas and systems used at KHz to MHz frequency domain of wireless technology.Covers the digital revolution that has changed the wholesale electronic systems of modern wireless technology, and the development of digital computers has also been discussed with a brief overview of laptops, supercomputers, and upcoming quantum computers.This overall scenario of historical perspective of wireless technology from KHz to THz and technical developments from KHz to MHz in the RF domain during the formative stage of development of wireless technology including fundamental developments related to digital revolution is expected to attract the interest of the entry level students, research scholars, professionals, and even the general readers alike with a new vision to have a quick yet in-depth glimpse of the progress of wireless technology since its inception till today. It is primarily written for junior undergraduate students in the fields of electrical engineering, electronics and communication engineering, wireless communication, telecommunication, and computer engineering. Research scholars and professionals can also refresh their idea of the developments of wireless technology during its formative stage and can get a flavour of the route to modern developments that have taken place henceforth.

This book covers the active devices, circuits and systems including antennas used in the electromagnetic spectrum for wireless technology in the GHz to THz frequency range. It also includes the whole domain of digital communication techniques and its use in modern electronic communication including those in 5G and the forthcoming 6G mobile communication. The presentation of the book is in a concise yet complete way and stresses the physical and technical aspects with application view-points but using minimum possible mathematics.The book: Discusses the intricate differences and evolution of GHz (i.e. microwaves) to THz devices and circuits including antennas, useful for wireless technology in this higher frequency domain of electromagnetic spectrum, comparing those with their counter parts at lower RF frequency of KHz to MHz.Briefly discusses various wireless systems in the GHz frequency range—both analogue and digital; like RDAR and radio-aids to navigation, satellite communication, mobile communication, GPS and so forth.Highlights the need and usefulness of digital communication and covers various digital modulation techniques like PCM, ASK, FSK, PSK, QAM and also various analogue and digital multiplexing techniques like FDM, TDM, CDM, OFDM, and NOMA useful for modern digital communication.Discusses the new and emerging technology of wireless technology at THz frequency covering signal generation, waveguide and quasi-optic components including sensors and detectors, antennas, channel modelling, T-ray imaging and so forth.Covers the applications of THz for various emerging new applications like concealed weapon detection (CWD), standoff detection of explosives and abusive drugs, medical application of THz including the use of THz in forthcoming 6G mobile communication etc.This overall scenario of developments of wireless technology from GHz to THz frequency domain is expected to attract the interest of students, research scholars, professionals, and even the general readers alike with a new vision to have a quick yet in-depth glimpse of the progress of wireless technology in the modern times. It is primarily written for senior undergraduate students, post-graduate students, and academic researchers in the fields of electrical engineering, electronics and communication engineering, wireless communication, telecommunication, and computer engineering.

This book covers the active devices, circuits and systems including antennas used in the electromagnetic spectrum for wireless technology in the GHz to THz frequency range. It also includes the whole domain of digital communication techniques and its use in modern electronic communication including those in 5G and the forthcoming 6G mobile communication. The presentation of the book is in a concise yet complete way and stresses the physical and technical aspects with application view-points but using minimum possible mathematics.The book: Discusses the intricate differences and evolution of GHz (i.e. microwaves) to THz devices and circuits including antennas, useful for wireless technology in this higher frequency domain of electromagnetic spectrum, comparing those with their counter parts at lower RF frequency of KHz to MHz.Briefly discusses various wireless systems in the GHz frequency range—both analogue and digital; like RDAR and radio-aids to navigation, satellite communication, mobile communication, GPS and so forth.Highlights the need and usefulness of digital communication and covers various digital modulation techniques like PCM, ASK, FSK, PSK, QAM and also various analogue and digital multiplexing techniques like FDM, TDM, CDM, OFDM, and NOMA useful for modern digital communication.Discusses the new and emerging technology of wireless technology at THz frequency covering signal generation, waveguide and quasi-optic components including sensors and detectors, antennas, channel modelling, T-ray imaging and so forth.Covers the applications of THz for various emerging new applications like concealed weapon detection (CWD), standoff detection of explosives and abusive drugs, medical application of THz including the use of THz in forthcoming 6G mobile communication etc.This overall scenario of developments of wireless technology from GHz to THz frequency domain is expected to attract the interest of students, research scholars, professionals, and even the general readers alike with a new vision to have a quick yet in-depth glimpse of the progress of wireless technology in the modern times. It is primarily written for senior undergraduate students, post-graduate students, and academic researchers in the fields of electrical engineering, electronics and communication engineering, wireless communication, telecommunication, and computer engineering.

This book deals with the design of circuits, devices, and systems at RF (radio frequency) and microwave frequencies using both the analytical technique and also the EDA (electronic design automation) software tools. EDA-based design technique is now used extensively that helps to translate the optimally designed structures directly to actual fabrication.Salient features of the book:Fundamentals of RF and microwave devices and circuits have been covered in a concise manner in order to help the students and design engineers to refresh and recapitulate some of the basic concepts which is helpful from a designer’s point of view.Design of RF matching circuit with stub matching technique has been provided with analytical design approach supplemented by the design using Smith chart. Also, RF/microwave filter basics have been discussed along with the analytical design technique and also with the EDA simulation tool-based design of low-pass, band-pass, and band-stop filters. The design of recently emerging metamaterial-inspired filter has also been included.Basic concepts of RF/microwave oscillator and amplifier have been discussed together with the design of IMPATT oscillator and varactor-tuned VCO, low-noise amplifier and power amplifier design using EDA software tool.Microwave power combiner and microwave mixer design has been given using EDA simulation tool. Also, a brief discussion regarding RF/microwave antennas has been given with design examples of conventional and metamaterial-inspired microstrip patch antenna.RF/microwave system design concepts have been covered concisely which is required by the students and design engineers to understand the system performance along with some rudimentary design of RF/microwave communication and radar system using EDA simulation tool has also been included.It is primarily written for senior undergraduates, graduate students, including academic researchers and professionals engaged in electrical engineering, electronics and communication engineering, RF and microwave design, nanoelectronics, and physics studies.