High Accuracy Resonator Spectroscopy of Atmospheric Gases at Millimetre and Submillimetre Waves


Book Description

This book is devoted to the most efficient method of obtaining spectroscopic parameters characterising the absorption of microwave radiation by the Earth’s atmosphere. It explores why this field of science is interesting and important for humanity, and details the basics of gas phase molecular spectroscopy. The book also shows the advantages of the resonator spectroscopy technique for quantitative molecular analysis, and reviews the best-known investigations of diagnostic atmospheric lines and the continuum in the millimetre and submillimetre-wave range. It will appeal to a wide range of specialists in the fields of spectroscopy, atmospheric physics, and millimetre and submillimetre-wave techniques, and will be helpful for lecturers and students concerned with these specialised courses.







High Resolution Molecular Spectroscopy of Atmospheric Sciences


Book Description

During this project period the temperature dependence of the collision-broadened line widths of few selected lines of SO2 and H2S were studied between 90 K and 600 K. Selected lines were 18(3,15)- 18(2,16), 4(2,2)-3(1,3), 13(1,13)- 12(0,12), and 26(4,22)- 26(3,23) transitions of SO2 at 204.246 GHz, 235.151 GHz, 251.199 GHz, and 280.807 GHz respectively, and 1(1,0)-1(0,1) and 2(2,0) - 2(1,1) transitions of H2S at 168.762 GHz and 216.710 GHz respectively. The broadening gases were N2, O2, H2, and He. Reported pressure broadening results of SO2 and H2S extends for the first time to such a wide range of temperature. The newly developed Fast Scan Submillimeter Spectroscopic Technique (FASSST) was applied to investigate HNO3. A brief description of the system and some preliminary results related to HNO3 are included in the text below.




Millimeter and Submillimeter Wave Spectroscopy of Solids


Book Description

Millimeter and Submillimeter Wave Spectroscopy of Solids focuses on the experimental methods and recent experimental results which are currently employed in the millimeter wave spectral range. Time dome, Fourier transform, coherent source and resonant techniques are discussed by leading authorities in the field. The usefulness of the methods is discussed by reviewing experimental results on metals and semiconductors. Recent experiment covering modern topics such as correlation on metals, superconductors and confined quantum systems are also discussed. The volume is aimed at physicists, engineers and materials scientists interested in the dynamics of solid matter.







Physics Briefs


Book Description










Metron


Book Description

Measurement, control, automation.




Millimeter-Wave Antennas: Configurations and Applications


Book Description

This book comprehensively reviews the state of the art in millimeter-wave antennas, traces important recent developments and provides information on a wide range of antenna configurations and applications. While fundamental theoretical aspects are discussed whenever necessary, the book primarily focuses on design principles and concepts, manufacture, measurement techniques, and practical results. Each of the various antenna types scalable to millimeter-wave dimensions is considered individually, with coverage of leaky-wave and surface-wave antennas, printed antennas, integrated antennas, and reflector and lens systems. The final two chapters address the subject from a systems perspective, providing an overview of supporting circuitry and examining in detail diverse millimeter-wave applications, including high-speed wireless communications, radio astronomy, and radar. The vast amount of information now available on millimeter-wave systems can be daunting for researchers and designers entering the field. This book offers readers essential guidance, helping them to gain a thorough understanding based on the most recent research findings and serving as a sound basis for informed decision-making.