The book "Practice No. 112 . The study of rotating polarization antennas, created by the team of authors, represents a unique and deep source of knowledge for specialists and students seeking to expand their horizons in the field of radio engineering and antenna technologies. This book is not just a textbook, but a real guide to the complex aspects of the study and practical application of antennas with rotating polarization, which is becoming increasingly popular in modern communication systems, radar installations and satellite technologies. What makes “Practice No. 112” especially valuable for the reader? First of all, it is its practical focus . The team of authors, with extensive experience in the field of radio engineering, carefully collected and systematized the methods, approaches and experimental practices necessary for the analysis and design of antennas with rotating polarization. The book deals in detail with the measurement of antenna characteristics, features of their adjustment and optimization, as well as methods of modeling and testing in the laboratory. This approach makes the book an indispensable tool for engineers and researchers working in the development of modern communication and navigation systems. The book "Practice No. 112" is intended for a wide audience - from undergraduate students and graduate students studying radio engineering and electronics, to experienced engineers looking for new solutions and ideas for their projects. It will be especially useful for specialists involved in the design of antennas for satellite systems, radar systems and mobile communications, where rotating polarization plays a key role in improving the efficiency and reliability of signal transmission. For those interested in modern communication technologies, features of antenna systems and new research methods, this book will be a valuable source of information and practical recommendations. The topics raised in Practice No. 112 cover a wide range of issues related to the theory and practice of studying rotating polarization antennas. The book examines in detail the principles of operation of such antennas, their advantages and limitations, as well as the features of their operation in various conditions. Particular attention is paid to experimental methods for measuring parameters, analyzing the data obtained and interpreting the results, which makes the book not only a theoretical manual, but also a practical guide for conducting research and developing new solutions. The style of presentation of the authors is distinguished by clarity and logical consistency, which makes it easy to assimilate complex technical concepts even for those who are just starting their way in radio engineering. At the same time, the book contains many practical tips and recommendations based on real research and experience of leading industry professionals. This makes Practice 112 a valuable tool for those who want to not only understand the theory, but also put the knowledge into practice by creating efficient antennas with rotating polarization. If you are already familiar with other works in the field of radio engineering, for example, with classic textbooks on antennas or modern manuals on communication systems, then this book will be a logical continuation and addition to you. Its special style, rich in technical details and practical cases, allows not only to expand theoretical knowledge, but also to acquire the skills necessary to solve specific engineering problems. Overall, "Practice No. 112. The study of rotating polarization antennas is not just a collection of methods and recommendations, but a complete guide to modern technologies in the field of antenna systems. It deservedly occupies a place in the library of every radio technician, engineer or researcher who seeks to improve their skills and create innovative solutions. This book will be a reliable assistant in mastering the complex aspects of research and development of antennas with rotating polarization, opening up new horizons in the field of wireless technologies and satellite systems.