Advances in terahertz technology and its applications This book highlights the growing applications of THz technology and various modules used for their successful realization. The enormous advantages of THz devices like higher resolution spatial directivity high speed communication greater bandwidth non ionizing signal nature and compactness make them useful in various applications like communication sensing security safety spectroscopy manufacturing bio medical agriculture imaging etc. Since the THz radiation covers frequencies from 0.1THz to around 10THz and highly attenuated by atmospheric gases they are used in short distance applications only. The book focuses on recent advances and different research issues in terahertz technology and presents theoretical methodological well established and validated empirical works dealing with the different topics.