Название: Wireless Technology Gigahertz to Terahertz
Автор: Subal Kar
Издательство: CRC Press
Год: 2025
Страниц: 275
Язык: английский
Формат: pdf (true), epub
Размер: 30.7 MB

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.

Wireless technology has come a long way since its modest beginning in the last decade of the 19th century with an exponential growth of its developments in the following decades leading to a wholesale wireless-based lifestyle of today. This book has covered the higher-frequency part of the electromagnetic (EM) spectrum from gigahertz (GHz) to terahertz (THz), dealing with the developments of various devices, circuits, and systems including antennas. In every sphere of life, we now use electronic gadgets like smartphones, the internet, GPS and wireless-based systems like radio, TV, and radar, security equipment like concealed weapon detection (CWD), standoff detection of explosives, and medical diagnostic equipment like T-ray imager, and so forth.

A correlated knowledge of the developments of wireless technology from GHz to THz is the need of the hour for advanced-level undergraduate and postgraduate students, researchers, professionals, and even inquisitive general readers to get a glimpse of and insight into the subject over this broad domain of the EM spectrum and its use in various applications around us. The idea of writing this book stems from addressing this urgent need with due perspective to understand the physics of the subject and the application view-points of this important technology of the day holistically. How the technological methodology changes with the requirement for new physical principles as we go from kHz-to-MHz through GHz and going to the THz technology of today is very important to appreciate the new developments that took place in different frequency ranges in different periods, which has resulted in a new class of devices, circuits, antennas, and systems. My other book titled Wireless Technology—Kilohertz to Megahertz takes care of the lower RF part of the EM spectrum used for wireless technology, while this book covers the GHz to THz frequency domain. In all these frequency ranges (from kHz-to-MHz going through GHz to THz), some of the underlying principles remain more or less the same; however, a number of special principles and design techniques also evolved with time in the particular frequency range of operation of the wireless system.

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.