Space Science, Technology and Application Series – serie

This book combines the experience and achievements in engineering practice of the China Academy of Space Technology, Xi’an, with a focus on the field of high-power multipactor over recent decades. It introduces the main concepts, theories, methods and latest technologies of multipactor simulation, at both the theoretical level and as a process of engineering, while providing a comprehensive introduction to the outstanding progress made in the research technology of multipactor numerical simulation in China. At the same time, a three-dimensional numerical simulation method of multipactor for typical high-power microwave components of spacecraft is introduced.This book is an essential volume for engineers in the field of high-power microwave technology. It can also be used as a reference for researchers in related fields, or as a teaching reference book for graduate students majoring in Astronautics at colleges and universities.

This book combines the experience and achievements in engineering practice of the China Academy of Space Technology, Xi’an, with a focus on the field of high-power multipactor over recent decades. It introduces the main concepts, theories, methods and latest technologies of multipactor simulation, at both the theoretical level and as a process of engineering, while providing a comprehensive introduction to the outstanding progress made in the research technology of multipactor numerical simulation in China. At the same time, a three-dimensional numerical simulation method of multipactor for typical high-power microwave components of spacecraft is introduced.This book is an essential volume for engineers in the field of high-power microwave technology. It can also be used as a reference for researchers in related fields, or as a teaching reference book for graduate students majoring in Astronautics at colleges and universities.

Focusing on passive intermodulation (PIM), a common instance of distortion in high-power multi-channel communication systems, the book introduces the concepts and technology of PIM.In the context of "space-ground-object" integrated communication and increasing spectrum resource constraints, the PIM problem is becoming increasingly prominent, while microwave components and system-level PIM are facing new challenges. Based on the experience and achievements in engineering practice of the China Academy of Space Technology in Xi’an, this title describes the basic theory, generation mechanism, analysis and evaluation methods, location detection and suppression techniques for microwave components of spacecraft PIM from a theoretical and engineering perspective. Furthermore, the latest achievements of microwave component PIM are outlined in depth, along with operational guidance and paths for further advancement.This book will be a useful reference for researchers, engineers and students interested in microwave technology, satellite technology and mobile communication technology. Wanzhao Cui is a professor at the National key Laboratory of Science and Technology on Space Microwave, at the China Academy of Space Technology, Xi’an, China. His current research interests include microwave technology and satellite communication. Jun Li is a professor at the National key Laboratory of Science and Technology on Space Microwave, at the China Academy of Space Technology, Xi’an, China. He is engaged in research on microwave technology and satellite communication. Huan Wei is a senior engineer at the National key Laboratory of Science and Technology on Space Microwave, at the China Academy of Space Technology, Xi’an, China. Her expertise is in the field of space microwave technology. Xiang Chen is a senior engineer at the National Key Laboratory of Science and Technology on Space Microwave, at the China Academy of Space Technology, Xi’an, China. His research interests are microwave and millimeter wave technology.

Focusing on passive intermodulation (PIM), a common instance of distortion in high-power multi-channel communication systems, the book introduces the concepts and technology of PIM.In the context of "space-ground-object" integrated communication and increasing spectrum resource constraints, the PIM problem is becoming increasingly prominent, while microwave components and system-level PIM are facing new challenges. Based on the experience and achievements in engineering practice of the China Academy of Space Technology in Xi’an, this title describes the basic theory, generation mechanism, analysis and evaluation methods, location detection and suppression techniques for microwave components of spacecraft PIM from a theoretical and engineering perspective. Furthermore, the latest achievements of microwave component PIM are outlined in depth, along with operational guidance and paths for further advancement.This book will be a useful reference for researchers, engineers and students interested in microwave technology, satellite technology and mobile communication technology. Wanzhao Cui is a professor at the National key Laboratory of Science and Technology on Space Microwave, at the China Academy of Space Technology, Xi’an, China. His current research interests include microwave technology and satellite communication. Jun Li is a professor at the National key Laboratory of Science and Technology on Space Microwave, at the China Academy of Space Technology, Xi’an, China. He is engaged in research on microwave technology and satellite communication. Huan Wei is a senior engineer at the National key Laboratory of Science and Technology on Space Microwave, at the China Academy of Space Technology, Xi’an, China. Her expertise is in the field of space microwave technology. Xiang Chen is a senior engineer at the National Key Laboratory of Science and Technology on Space Microwave, at the China Academy of Space Technology, Xi’an, China. His research interests are microwave and millimeter wave technology.

Drawing on practical engineering experience and latest achievements of space technology in China, this title investigates spacecraft system design and introduces several design methods based on the model development process.A well-established space engineering system with spacecraft as the core is integral to spaceflight activities and missions of entering, exploring, developing and utilizing outer space. This book expounds the key phases in the workflow of spacecraft development, including task analysis, overall plan design, external interface, configuration and assembly design and experimental verification. Subsystems that function as the nuclei of spacecraft design and important aspects in the model development process are then examined, such as orbit design, environmental influence factors, reliability design, dynamics analysis, etc. In addition, it also discusses the digital environment and methods to improve the efficiency of system design.The title will appeal to researchers, students, and especially professionals interested in spacecraft system design and space engineering.

Drawing on practical engineering experience and latest achievements of space technology in China, this title investigates spacecraft system design and introduces several design methods based on the model development process.A well-established space engineering system with spacecraft as the core is integral to spaceflight activities and missions of entering, exploring, developing and utilizing outer space. This book expounds the key phases in the workflow of spacecraft development, including task analysis, overall plan design, external interface, configuration and assembly design and experimental verification. Subsystems that function as the nuclei of spacecraft design and important aspects in the model development process are then examined, such as orbit design, environmental influence factors, reliability design, dynamics analysis, etc. In addition, it also discusses the digital environment and methods to improve the efficiency of system design.The title will appeal to researchers, students, and especially professionals interested in spacecraft system design and space engineering.

Focusing on the theory and state-of-the-art technologies of ultrasonic testing (UT), this book examines ultrasonic propagation in solids and its detection applications, and explores the intersection of UT technology with various fields of electromagnetics, optics and physics.UT is one of the most widely used nondestructive testing techniques due to its high performance in terms of detection efficiency and safety. The rapid development of modern industrial products and technologies has created a new challenge and demand for ultrasonic nondestructive testing technology. This book introduces the fundamentals of UT, including sound wave and sound field, interface wave theory and liquid-solid coupled sound field. It then discusses various types of UT methods, ranging from the critically refracted longitudinal wave method to ultrasonic surface wave and ultrasonic guided wave detection methods. Some newly developed UT techniques are also discussed, including phased-array UT, high-frequency UT and non-contact UT.This title will appeal to engineering students and technicians in the field of ultrasonic nondestructive testing.

Focusing on the theory and state-of-the-art technologies of ultrasonic testing (UT), this book examines ultrasonic propagation in solids and its detection applications, and explores the intersection of UT technology with various fields of electromagnetics, optics and physics.UT is one of the most widely used nondestructive testing techniques due to its high performance in terms of detection efficiency and safety. The rapid development of modern industrial products and technologies has created a new challenge and demand for ultrasonic nondestructive testing technology. This book introduces the fundamentals of UT, including sound wave and sound field, interface wave theory and liquid-solid coupled sound field. It then discusses various types of UT methods, ranging from the critically refracted longitudinal wave method to ultrasonic surface wave and ultrasonic guided wave detection methods. Some newly developed UT techniques are also discussed, including phased-array UT, high-frequency UT and non-contact UT.This title will appeal to engineering students and technicians in the field of ultrasonic nondestructive testing.

This book examines the physical mechanisms of secondary electrons and recent developments, focusing on the theory and applications of secondary electron emission and suppression technology.With the development of the modern information industry, space microwave technology, new materials, devices, and high-precision processing methods, secondary electron emission and its applications face new scientific and engineering challenges and opportunities. This book discusses theoretical models, measurements, data results, surface processes, and dielectric charging analysis of secondary electron emission. It covers key areas such as particle physics theory, simulation algorithms, magneto-hydrodynamics, surface processes, and surface characterization. The secondary electron yield and energy spectrum data are disclosed and analyzed, benefiting fields such as space microwave multipactor, scanning electron microscope (SEM), particle accelerator, and microwave plasma. Several typical application scenarios are also presented. Using the secondary electron emission data provided, this book shows how the secondary electron multiplication effect can be suppressed and exploited to improve device performance.This title will be a valuable reference for researchers and students interested in the physical mechanisms of secondary electrons, SEM, accelerators, electrostatic discharge, and space multipactor.

This book examines terahertz technology and its applications in atmospheric remote sensing.Terahertz waves are electromagnetic radiation between microwaves and infrared radiation in the electromagnetic spectrum. They have the capability of greater directivity, higher power density, higher resolution imaging, richer fingerprint spectrum, wider bandwidth and faster transmission rate. Such properties promise great potential for terahertz technology applications in many fields, particularly in the detection of substances and the exploration of space. The book begins with an introduction to the development of space terahertz remote sensing and the underlying theories. The next seven chapters cover the key equipment and critical technologies for terahertz remote sensing, including the terahertz radiometer and its calibration and receiver link; the terahertz reflector antenna and its tolerance analysis; remote sensing imagery; and space resolution enhancement of both oversampled and non-oversampled data. The final chapter presents the application of terahertz imaging technology in the field of security inspection.This title will serve as a valuable reference for academics, students and engineers in the fields of terahertz technology, space science and remote sensing. Professionals in atmospheric remote sensing and inspection imaging will also benefit from this book.