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| vhf uhf propagation: Radio Wave Propagation Fundamentals, Second Edition Artem Saakian, 2020-12-31 This completely updated second edition of an Artech House classic provides a thorough introduction to the basic principles of electromagnetic wave propagation of radio frequencies in real-world conditions, fully updated by including new achievements in theory and technology. It serves as an invaluable daily reference for practitioners in the field and as a complete, organized text on the subject. This comprehensive resource covers a wide range of essential topics, from the classification of radio waves, electromagnetic wave theory, and antennas for RF radio links, to the impact of the earth surface on the propagation of ground waves, atmospheric affects in radio wave propagation, and radio wave reception. The book explores the propagation of the ground radio waves, namely the waves that propagate in vicinity of the earth's surface (e.g., guided by that interface), without involvement of any atmospheric effects. Specifics of the high-frequency (HF) radio propagation due to reflections from ionospheric layers is studied, based on commonly used models of the ionospheric vertical profiles. Scattering of the radio waves of UHF and higher frequency bands from the random variations of the tropospheric refraction index (from tiny air turbulences) are also considered by using the principles of statistical radio-physics. Analysis of propagation conditions on real propagation paths, including analysis of the power budget of the VHF/UHF link to assure its stability (percentage of availability within observation time frame), terrestrial, broadcast, mobile, and satellite RF links are presented. The engineering design of the cellular networks, including LTE 4G, 5G and upcoming higher generations is explored. HF propagation predictions for extremely long-range links design for commercial and military applications are explained. Packed with examples and problems, this book provides a theoretical background for astrophysical, aeronomy and geophysical instrumentation design. |
| vhf uhf propagation: Radio Propagation Ian Poole, 2004 |
| vhf uhf propagation: Radio Wave Propagation John A. Richards, 2008-01-22 This work treats the essential elements of radio wave propagation without requiring recourse to advanced electromagnetic concepts and equations. However, it provides sufficient detail to allow those concerned with wireless systems to acquire quickly a practical working knowledge of the important concepts. Radio wave propagation is placed in a practical context by considering the design aspects of communications systems at microwave frequencies. A fuller consideration of the electromagnetic properties of materials is given late in the book rather than as an introductory chapter. |
| vhf uhf propagation: Propagation of Radiowaves L. W Barclay, 2003 This book has been fully updated to reflect the latest developments in the field of radio communications. This book introduces the basic concepts and mechanisms of radiowave propagation engineering in both the troposphere and ionosphere, and includes greater emphasis on the needs of digital technologies and new kinds of radio systems. |
| vhf uhf propagation: Introduction to RF Propagation John S. Seybold, 2005-10-03 An introduction to RF propagation that spans all wireless applications This book provides readers with a solid understanding of the concepts involved in the propagation of electromagnetic waves and of the commonly used modeling techniques. While many books cover RF propagation, most are geared to cellular telephone systems and, therefore, are limited in scope. This title is comprehensive-it treats the growing number of wireless applications that range well beyond the mobile telecommunications industry, including radar and satellite communications. The author's straightforward, clear style makes it easy for readers to gain the necessary background in electromagnetics, communication theory, and probability, so they can advance to propagation models for near-earth, indoor, and earth-space propagation. Critical topics that readers would otherwise have to search a number of resources to find are included: * RF safety chapter provides a concise presentation of FCC recommendations, including application examples, and prepares readers to work with real-world propagating systems * Antenna chapter provides an introduction to a wide variety of antennas and techniques for antenna analysis, including a detailed treatment of antenna polarization and axial ratio; the chapter contains a set of curves that permit readers to estimate polarization loss due to axial ratio mismatch between transmitting and receiving antennas without performing detailed calculations * Atmospheric effects chapter provides curves of typical atmospheric loss, so that expected loss can be determined easily * Rain attenuation chapter features a summary of how to apply the ITU and Crane rain models * Satellite communication chapter provides the details of earth-space propagation analysis including rain attenuation, atmospheric absorption, path length determination and noise temperature determination Examples of widely used models provide all the details and information needed to allow readers to apply the models with confidence. References, provided throughout the book, enable readers to explore particular topics in greater depth. Additionally, an accompanying Wiley ftp site provides supporting MathCad files for select figures in the book. With its emphasis on fundamentals, detailed examples, and comprehensive coverage of models and applications, this is an excellent text for upper-level undergraduate or graduate students, or for the practicing engineer who needs to develop an understanding of propagation phenomena. |
| vhf uhf propagation: The Mobile Radio Propagation Channel J. D. Parsons, 1996-03-01 Offers in-depth discussions of multipath phenomena and its effects on narrowband and wideband signals. Presents basic information about the mobile radio channel and introduces some fundamental VHF and UHF propagation. Surveys signal strength prediction methods applicable over irregular terrain and in urban, suburban and rural areas as well as methods of channel sounding and simulation. |
| vhf uhf propagation: EW 102 David Adamy, 2004 Serving as a continuation of the bestselling book EW 101: A First Course in Electronic Warfare, this new volume is a second book based on the popular tutorials featured in the Journal of Electronic Defense. Without delving into complex mathematics, this book lets you understand important concepts central to EW, so you gain a basic working knowledge of the technologies and techniques deployed in today's EW systems. |
| vhf uhf propagation: Measurements of VHF/UHF Radio Propagation in a Maritime Temperature Climate Communications Research Centre (Canada), J. H. Whitteker, 1985 |
| vhf uhf propagation: The VHF/UHF DX Book Ian White, 1992 Assembling a VHF/UHF amateur radio station -- VHF/UHF propagation -- Operating techniques -- Transmitters, power amplifiers & EMC -- Antennas -- Designs for VHF and UHF transverters -- Power supplies -- Station control -- Test equipment, etc. |
| vhf uhf propagation: Mobile Radio Network Design in the VHF and UHF Bands Adrian Graham, Nicholas C. Kirkman, Peter M. Paul, 2007-01-02 Radio propagation is fundamental to radio system design. This text fills the gap in the market for a how-to-do-it for professional engineers; an explanation of how to position and configure radio equipment in order to achieve a specific objective. |
| vhf uhf propagation: Ham Radio For Dummies H. Ward Silver, 2018-03-02 Your how-to guide to become a ham Ham radio, or amateur radio, is a way to talk with people around the world in real-time, or to send email without any sort of internet connection. It provides a way to keep in touch with friends and family, whether they are across town or across the country. It is also a very important emergency communication system. When cell phones, landlines, the internet, and other systems are down or overloaded, Amateur Radio still gets the message through. Radio amateurs, often called hams, enjoy radio technology as a hobby, but are often called upon to provide vital service when regular communications systems fail. Ham Radio For Dummies is your guide to everything there is to know about ham radio. Plus, this updated edition provides new and additional information on digital mode operating, as well as use of amateur radio in student science and new operating events. • Set up your radio station • Design your ham shack • Provide support in emergencies and communicate with other hams • Study for the licensing exam and choose your call sign If you're looking to join a college radio club or just want to learn the latest tips and tricks, this book is a helpful reference guide to beginners, or those who have been hams for years. |
| vhf uhf propagation: Mobile Communications Design Fundamentals William C. Y. Lee, 2010-07-15 Revised and enlarged version that discusses how to design a mobile communications system. Comprehensively examines the mobile radio environment. Covers prediction of propagation loss, calculation and methods of reducing fades, interference, frequency plans and associated schemes, design parameters, signaling and channel access, cellular CDMA, microcell systems, and miscellaneous related systems. Contains chapter-by-chapter references and problems. |
| vhf uhf propagation: Measurements of VHF/UHF Radio Propagation in a Maritime Temperate Climate Communications Research Centre (Canada), 1985 |
| vhf uhf propagation: Wireless Communication in Underground Mines L. K. Bandyopadhyay, S. K. Chaulya, P. K. Mishra, 2009-08-29 Wireless communication has emerged as an independent discipline in the past decades. Everything from cellular voice telephony to wireless data transmission using wireless sensor networks has profoundly impacted the safety, production, and productivity of industries and our lifestyle as well. After a decade of exponential growth, the wireless industry is one of the largest industries in the world. Therefore, it would be an injustice if the wireless communication is not explored for mining industry. Underground mines, which are characterized by their tough working conditions and hazardous environments, require fool-proof mine-wide communication systems for smooth functioning of mine workings and ensuring better safety. Proper and re- able communication systems not only save the machine breakdown time but also help in immediate passing of messages from the vicinity of underground working area to the surface for day-to-day normal mining operations as well as for speedy rescue operations in case of disaster. Therefore, a reliable and effective commu- cation system is an essential requisite for safe working, and maintaining requisite production and productivity of underground mines. Most of the existing systems generally available in underground mines are based on line (wired) communication principle, hence these are unable to withstand in the disaster conditions and dif?cult to deploy in inaccessible places. Therefore, wireless communication is an indispe- able, reliable, and convenient system and essential in case of day-to-day normal duty or disaster situations. |
| vhf uhf propagation: Antennas and Wave Propagation G. S. N. Raju, 2006 Antennas and Wave Propagation is written for the first course on the same. The book begins with an introduction that discusses the fundamental concepts, notations, representation and principles that govern the field of antennas. A separate chapter on mathematical preliminaries is discussed followed by chapters on every aspect of antennas from Maxwell's equations to antenna array analysis, antenna array synthesis, antenna measurements and wave propagation. |
| vhf uhf propagation: Communications, Radar and Electronic Warfare Adrian Graham, 2011-01-04 A practical guide to the principles of radio communications for both civilian and military applications In this book, the author covers both the civilian and military uses of technology, focusing particularly on the applications of radio propagation and prediction. Divided into two parts, the author introduces the basic theory of radio prediction before providing a step-by-step explanation of how this theory can be translated into real-life applications. In addition, the book presents up-to-date systems and methods to illustrate how these applications work in practice. This includes systems working in the HF bands and SHF. Furthermore, the author examines the performance of these systems, and also the effects of noise, interference and deliberate jamming, as well as the performance of jamming, detection and intercept systems. Particular attention is paid to the problems caused by Radio Controlled Improvised Explosive Devices (RCIEDs). Key Features: A practical handbook on the topic of radio communications and propagation Written by an expert in both the civilian and military applications of the technology Focuses on methods such as radio and radar jamming, and radio-controlled improvised explosive devices (IEDs) Contains problems and solutions to clarify key topics |
| vhf uhf propagation: Scientific and Technical Aerospace Reports , 1977 |
| vhf uhf propagation: NBS Technical Note , 1959 |
| vhf uhf propagation: Radio Spectrum Management David J. Withers, 1999 Intended as a handbook for administrators and engineers, this book reviews the processes of interference management, regulation of competing service providers, and system standardization for the control and use of the radio spectrum. The second edition reflects changes in the field since 1991, such as the increased use of mobile radiotelephones, the introduction of low-orbit satellite systems, restructuring of fees, and government regulation. Annotation copyrighted by Book News, Inc., Portland, OR |
| vhf uhf propagation: Broadcast Transmission Engineering Practice William Wharton, Shaun Metcalfe, Geoff C. Platts, 2023-12-22 Broadcast Transmission Engineering Practice (1992) contains a wealth of technical knowledge and practical experience, as well as detailed guidance on how to initiate, supervise and bring transmission engineering projects to fruition. |
| vhf uhf propagation: The A.R.R.L. Antenna Book , 1956 |
| vhf uhf propagation: Wireless Communications Asrar U. H. Sheikh, 2004 Intended for a graduate course on wireless communications, this textbook concentrates more on conceptual fundamentals than on rigorous mathematical treatment. The author first describes the radio environment, discussing issues of radio wave propagation theory, signal strength, and radio coverage are |
| vhf uhf propagation: Handbook, Federal Radio Use, Boulder Support Byron Emerson Blair, 1982 |
| vhf uhf propagation: Space Physics and Aeronomy, Space Weather Effects and Applications Anthea J. Coster, Philip J. Erickson, Louis J. Lanzerotti, 2021-04-06 Examines how solar and terrestrial space phenomena affect sophisticated technological systems Contemporary society relies on sophisticated technologies to manage electricity distribution, communication networks, transportation safety, and myriad other systems. The successful design and operation of both ground-based and space-based systems must consider solar and terrestrial space phenomena and processes. Space Weather Effects and Applications describes the effects of space weather on various present-day technologies and explores how improved instrumentation to measure Earth's space environment can be used to more accurately forecast changes and disruptions. Volume highlights include: Damage and disruption to orbiting satellite equipment by solar particles and cosmic rays Effects of space radiation on aircraft at high altitudes and latitudes Response of radio and radar-based systems to solar bursts Disturbances to the propagation of radio waves caused by space weather How geomagnetic field changes impact ground-based systems such as pipelines Impacts of human exposure to the space radiation environment The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals. Find out more about the Space Physics and Aeronomy collection in this Q&A with the Editors in Chief |
| vhf uhf propagation: Digital Audio Broadcasting Wolfgang Hoeg, Thomas Lauterbach, 2003-10-31 Now the standardisation work of DAB (Digital Audio Broadcasting) system is finished many broadcast organisations, network providers and receiver manufacturers in European countries and outside of Europe (for example Canada and the Far East) will be installing DAB broadcast services as pilot projects or public services. In addition some value added services (data and video services) are under development or have already started as pilot projects. The new digital broadcast system DAB distinguishes itself from existing conventional broadcast systems, and the various new international standards and related documents (from ITU-R, ISO/IEC, ETSI, EBU, EUREKA147, and others) are not readily available and are difficult to read for users. Therefore it is essential that a well structured technical handbook should be available. The Second Edition of Digital Audio Broadcasting has been fully updated with new sections and chapters added to reflect all the latest developments and advances. Digital Audio Broadcasting: Provides a fully updated comprehensive overview of DAB Covers international standards, applications and other technical issues Combines the expertise of leading researchers in the field of DAB Now covers such new areas as: IP-Tunneling via DAB; Electronic Programme Guide for DAB; and Metadata A comprehensive overview of DAB specifically written for planning and system engineers, developers for professional and domestic equipment manufacturers, service providers, as well as postgraduate students and lecturers in communications technology. |
| vhf uhf propagation: Measurements of VHF/UHF Radio Propagation in a Maritime Temperate Climate James Howard Whitteker, Communications Research Centre (Canada), Centre de recherches sur les communications (Canada), 1985 |
| vhf uhf propagation: Departments of Commerce, Justice, and State, the Judiciary, and Related Agencies Appropriations for 1987: Department of Commerce United States. Congress. House. Committee on Appropriations. Subcommittee on the Departments of Commerce, Justice, and State, the Judiciary, and Related Agencies, 1986 |
| vhf uhf propagation: Smart Antennas T. K. Sarkar, Michael C. Wicks, Magdalena Salazar-Palma, Robert J. Bonneau, 2005-03-04 A valuable addition to the Wiley Series in Microwave and Optical Engineering Today's modern wireless mobile communications depend on adaptive smart antennas to provide maximum range and clarity. With the recent explosive growth of wireless applications, smart antenna technology has achieved widespread commercial and military applications. The only book available on the topic of adaptive antennas using digital technology, this text reflects the latest developments in smart antenna technology and offers timely information on fundamentals, as well as new adaptive techniques developed by the authors. Coupling electromagnetic aspects of antenna design with signal processing techniques designed to promote accurate and efficient information exchange, the text presents various mechanisms for characterizing signal-path loss associated with signal propagation, particularly for mobile wireless communications systems based on such techniques as joint space-frequency adaptive processing. In clear, accessible language, the authors: * explain the difference between adaptive antennas and adaptive signal processing * Illustrate the procedures for adaptive processing using directive elements in a conformal array * clarify multistage analysis procedure which combines electromagnetic analysis with signal processing * present a survey of the various models for characterizing radio wave propagation in urban and rural environments * describe a method wherein it is possible to identify and eliminate multipath without spatial diversity * optimize the location of base stations in a complex environment The text is an excellent resource for researchers and engineers working in electromagnetics and signal processing who deal with performance improvement of adaptive techniques, as well as those who are concerned with the characterization of propagation channels and applications of airborne phased arrays. |
| vhf uhf propagation: Radio Meteorology Bradford R. Bean, E. J. Dutton, 1966 |
| vhf uhf propagation: Summary Report of Boulder Laboratories for Year Ending ... Boulder Laboratories (U.S.), 1954 |
| vhf uhf propagation: Compressive Sensing Based Algorithms for Electronic Defence Amit Kumar Mishra, Ryno Strauss Verster, 2016-12-22 This book details some of the major developments in the implementation of compressive sensing in radio applications for electronic defense and warfare communication use. It provides a comprehensive background to the subject and at the same time describes some novel algorithms. It also investigates application value and performance-related parameters of compressive sensing in scenarios such as direction finding, spectrum monitoring, detection, and classification. |
| vhf uhf propagation: Annual Report United States. Federal Communications Commission, 1967 |
| vhf uhf propagation: Perspectives on Radio and Television F. Leslie Smith, David H. Ostroff, John W. Wright, 2023-05-31 This textbook describes the field of radio and television in the United States, presents the material in a manner the reader can grasp and enjoy, and makes the book useful for the classroom teacher. Written for adaptation to individual teaching situations, the book is divided by subject matter into logical chapter divisions that can be assigned in the order appropriate for specific course students. Each chapter stands by itself, but the book is also an integrated whole. It is easy to understand at first reading, by beginning radio-television majors or nonmajor elective students alike. To give readers a complete picture of the field, subjects such as ethics, careers, and rivals to U.S. commercial radio and television are included. |
| vhf uhf propagation: Electromagnetic Wave Interactions Ardshir Guran, Raj Mittra, Philip J. Moser, 1996 This book is a collection of papers on electromagnetic wave mechanics and its applications written by experts in this field. It offers the reader a sampling of exciting research areas in this field. The topics include polarimetric imaging, radar spectroscopy, surface or creeping waves, bistatic radar scattering, the Seebeck affect. Mathematical methods include inverse scattering theory, singularity expansion method, mixed potential integral equation, method of moments, and diffraction theory. Applications include Cellular Mobile Radios (CMR), radar target identification, and Personal Communication Services (PCS). This book shows how electromagnetic wave theory is currently being utilized and investigated. It involves a modicom of mathematical physics and will be of interest to researchers and graduate students in electrical engineering, physics and applied mathematics. |
| vhf uhf propagation: Radio Operator's Handbook United States. Marine Corps, 1996 |
| vhf uhf propagation: Scientific and Technical Publications of the ESSA Research Laboratories , 1966 |
| vhf uhf propagation: Scientific and Technical Publications of the ESSA Research Laboratories, Fiscal Year 1970 (July 1, 1969 Through June 30, 1970). United States. Environmental Science Services Administration, 1970 |
| vhf uhf propagation: EPA-600/9 , 1981-03 |
| vhf uhf propagation: Index of Publications on Biological Effects of Electromagnetic Radiation (0-100 GHz) James B. Kinn, Elliot Postow, 1981 |
| vhf uhf propagation: Departments of Commerce, Justice, and State, the Judiciary, and Related Agencies Appropriations for 1984: Department of Commerce United States. Congress. House. Committee on Appropriations. Subcommittee on the Departments of Commerce, Justice, and State, the Judiciary, and Related Agencies, 1983 |
Very high frequency - Wikipedia
Very high frequency (VHF) is the ITU designation [1] [2] [3] for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding …
The Differences Between UHF and VHF Radio Frequencies
The first thing to know about UHF vs VHF is that UHF radio waves are shorter than VHF – 12 to 24 inches – so they don't need big antennas, making them less conspicuous. Radio range is …
VHF vs UHF Radios: The Differences Explained - Stryker Radios
Jul 17, 2023 · In this article, we’ll explain what UHF and VHF radios are, how they work, and give tips on which one is right for you. What are UHF and VHF? UHF, short for “Ultra High …
UHF vs VHF - Learn about radio frequencies - Radio Depot
Aug 15, 2020 · Explore the advantages of using UHF vs VHF radio frequencies along with the situations where you should choose VHF vs UHF. Our experts breakdown real world …
VHF | Marine, Airwaves & Radios | Britannica
VHF, conventionally defined portion of the electromagnetic spectrum including any radiation with a wavelength between 1 and 10 metres and a frequency between 300 and 30 megahertz. VHF …
What is VHF radio, and how is it different from UHF?
Jun 29, 2020 · VHF refers to radio waves operating in the range of 30 to 300 megahertz with a shorter wavelength than high-frequency (HF) bands. These bands, as with those in the UHF …
UHF vs. VHF - What's the Difference? | This vs. That
UHF (Ultra High Frequency) and VHF (Very High Frequency) are two different frequency bands used for various communication purposes. UHF operates in the frequency range of 300 MHz …
Very High Frequecy (VHF) | Advanced Navigation
Very High Frequency (VHF) is a key radio band used in navigation, aviation, and communication for clear, reliable signal transmission.
Understanding the Principle of VHF - ShallBD
The principle of VHF (Very High Frequency) refers to the use of radio waves with frequencies between 30 and 300 megahertz. This article provides an overview of how VHF works and its …
VHF very high frequency - Telecom Trainer
Jul 25, 2023 · Very High Frequency (VHF): Very High Frequency (VHF) is a band of radio frequencies that covers the range from 30 megahertz (MHz) to 300 MHz. VHF is part of the …
Very high frequency - Wikipedia
Very high frequency (VHF) is the ITU designation [1] [2] [3] for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to …
The Differences Between UHF and VHF Radio Frequencies
The first thing to know about UHF vs VHF is that UHF radio waves are shorter than VHF – 12 to 24 inches – so they don't need big antennas, making them less conspicuous. Radio range is also shortened, but you get …
VHF vs UHF Radios: The Differences Explained - Stryker Radios
Jul 17, 2023 · In this article, we’ll explain what UHF and VHF radios are, how they work, and give tips on which one is right for you. What are UHF and VHF? UHF, short for “Ultra High Frequency,” and VHF, short for “Very High …
UHF vs VHF - Learn about radio frequencies - Radio Depot
Aug 15, 2020 · Explore the advantages of using UHF vs VHF radio frequencies along with the situations where you should choose VHF vs UHF. Our experts breakdown real world applications for each frequency band along …
VHF | Marine, Airwaves & Radios | Britannica
VHF, conventionally defined portion of the electromagnetic spectrum including any radiation with a wavelength between 1 and 10 metres and a frequency between 300 and 30 megahertz. VHF signals are widely …
