Download or read book VHF UHF Fixed Station Mast Mounted Antennas System written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this program is to design, build, test and deliver a VHF-UHF fixed station mast mounted antenna system. Antenna Products proposed three configurations to investigate in an effort to achieve an acceptable system. Configuration A consisted of combining a VHF monopole/counterpoise antenna and a UHF collinear antenna. During the investigation it was found that the counterpoise did not properly terminate the radiating structure when the radials are less than a quarter wavelength long. The performance is characterized by a loss of gain at the lower frequencies. A full size structure would be larger and heavier than a dipole antenna. Therefore, no further investigation of configuration was undertaken. Configuration B consists of combining a VHF vertical half-rhombic antenna system and a UHF collinear antenna. The rhombic antenna system was envisioned as two rhombic curtains mounted orthogonally about a 10 meter mast and would serve as guys for the mast. The UHF antenna would mount on top of the mast. It has been determined that to achieve reasonably omnidirectional azimuth patterns it is necessary to use four rhombic curtains in an azimuth array. At the interim report, the height of the antenna was 10 meters and the radius was 25 meters. Further investigations have lead to a 10 meter tall structure with 10 meter radius that uses six equally spaced slant wires that are fed in-phase near ground and connected at the top of the tower. A UHF collinear dipole array mounts on top of the dielectric mast. A prototype of this antenna is available for shipment to CECOM for further evaluation. The propagation mode for this antenna is surfacewave instead of spacewave as commonly experienced when two antennas are mounted on masts above the earth's surface. Therefore, field tests should be conducted to determine the suitability of the antenna for the application.
Download or read book VHF and UHF Antennas written by R. A. Burberry and published by IET. This book was released on 1992 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the VHF and UHF antennas for the 30-3000 Mhz range that have been developed over the past 50 years, including many designs that have not previously been treated in detail, and several new uses for old designs. Among the topics are methods of predicting and measuring the performance of antennas, and how it is affected by the local environment, both normal and adverse, and by the structures on which the antennas are mounted, both fixed and mobile (including humans). Addressed primarily to practicing antenna engineers; the basic theory is assumed to be known except for the less known types. Distributed by INSPEC. Annotation copyright by Book News, Inc., Portland, OR
Download or read book Fixed and Base Station Antennas written by National Institute of Justice (U.S.) and published by . This book was released on 1998 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Antenna System Guide written by and published by . This book was released on 2001 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mobile Antennas written by John M. Vanderau and published by . This book was released on 1998 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NILECJ Standard for Fixed and Base Station Antennas written by National Institute of Law Enforcement and Criminal Justice and published by . This book was released on 1977 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Power Station Practice written by P.M. Reynolds and published by Elsevier. This book was released on 2013-10-22 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains two additional features which enhance the value of Modern Power Station Practice as a whole: a cumulative subject index and a detailed list of tables of contents for the entire work. The cumulative index provides access to the vast body of information presented in the set, and also indicates at a glance the breadth and depth of the treatment through the use of inclusive page ranges for major topics. In order to allow the reader the greatest flexibility in using the index there are many cross-references. The entries themselves are qualified by up to two descriptive subheadings to allow the most detailed coverage possible of the subject matter. The reproduction of the tables of contents for each volume also provides an overview of the organisation of the individual volumes.
Download or read book Amateur Radio HF Antennas written by Claude Jollet and published by Claude Jollet. This book was released on with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contents of this book are mostly aimed at the amateur radio beginner and aspiring ones. Therefore, this book provides answers to basic questions like: What is the best HF antenna for my needs and location? What type of stand-alone antenna tuner should I use and which should I avoid? How can I hide my HF antenna from the neighbors and still get acceptable performance from it? What about lightning protection? This book will supply immediately useful answers to the above questions and many more. A properly designed and installed amateur radio HF antenna system can potentially make the humblest ham radio equipment perform like stations worth thousands of dollars. We are confident that the antenna experimenter will find the information given here priceless. Furthermore, any ham radio operator, armed with the information this book contains, will become a much better informed buyer of commercially made HF antenna systems and accessories. This special compendium edition is published in response to ham radio operators who wrote to ask that all the basic information, on and related to amateur radio HF antennas, be made available in one book instead of four, arguing that it would be more convenient. The author and publisher agree. Therefore this edition contains the complete four-book series on Amateur Radio HF Antennas published by Claude Jollet, VE2DPE.
Download or read book Radio Receivers for Systems of Fixed and Mobile Communications written by Vasiliy V. Logvinov and published by Springer Nature. This book was released on 2022-05-13 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: The textbook acquaints the reader with the architecture of receivers of analog and digital radio systems, helps to study the stages of designing a modern radio receiver and reveals the reasons and methods for its effective operation in networks for various purposes. Particular attention is paid to the methods of generating and processing signals in the receivers of digital systems with multiple access, which make it possible to provide data transfer rates close to the maximum possible (according to Shannon). As a textbook for students studying methods of optimal signal reception, the book will also be useful to specialists in the field of telecommunications involved in the development of radio receivers. The book shows how the development of theoretical, circuitry and integrated technologies led to the active introduction of algorithmic methods for signal processing changed both the design of receivers and the methods of forming the information flow in free space (MIMO, beamforming). The creation of a global 5G network based on heterogeneous networks puts forward new requirements for the architecture of receivers, which are determined by the requirements to achieve high data rates, low time delays or use in networks with coordinated multipoint transmission and reception (CoMP). To consolidate the knowledge gained, the book includes a complete set of materials for online classes, including questions and answers, a guide to solving problems for each chapter, and computer modeling units of receivers in the MicroCAP environment, based on preliminary calculations.
Download or read book ARRL s VHF UHF Antenna Classics written by Steve Ford and published by American Radio Relay League (ARRL). This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ground planes, J-poles, mobile antennas, Yagis and more. Build a better antenna for your hand-held radio. Construct a 2-meter Yagi that will rival similar commercial antennas. Build a dual-band vertical for 146 and 445-MHz. The results will be rewarding! Includes projects gathered from the 1980 to 2003 issues of QST.
Download or read book Ham Radio For Dummies written by H. Ward Silver and published by John Wiley & Sons. This book was released on 2004-04-12 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: It’s time we cleared the air about ham radio. If you think of it as staticky transmissions sent by people in the middle of nowhere, think again. Today’s ham radio goes beyond wireless to extreme wireless, Operators transmit data and pictures, use the Internet, laser, and microwave transmitters, and travel to places high and low to make contact. In an emergency or natural disaster, ham radio can replace downed traditional communication and save lives. Whether you’re just getting turned on to ham radio or already have your license, Ham Radio for Dummies helps you with the terminology, the technology and the talknology. You discover how to: Decipher the jargon and speak the language Buy or upgrade your equipment, including the all-important antennas Build a ham radio shack, complete with the rig, a computer, mobile/base rig, microphones, keys, headphones, antennas, cables and feedlines Study for your license, master Morse code, take the test and get your call sign Understand the basics of ragchews (conversations), nets (organized on-air meetings) and DX-ing (competing in contacts to make contacts) Keeping logs with the vital statistics, including time (in UTC or World Time), frequency, and call sign Written by Ward Silver, an electrical engineer, Certified Amateur Radio License Examiner, and columnist for QST, a monthly magazine for ham operators, Ham Radio for Dummies gives you the info you need to delve into the science or dive into the conversation. It explains how you can: Tune in to the most common types of signals, including Morse Code (CW), single-sideband (SSB), FM, Radioteletype (RTTY), and data signals Break in, introduce yourself, converse, and say or signal goodbye Communicate while traveling (ham radio goes where mobile phones go dead) Register with an emergency organization such as ARES and RACES Help in emergencies such as earthquakes, wildfires, or severe weather Pursue your special interests, including contacting distant stations, participating in contests, exploring the digital modes, using satellites, transmitting images, and more Complete with a glossary and ten pages of additional suggested resources, Ham Radio for Dummies encourages you to touch that dial and take that mike. CUL. (That’s Morse Code for “see you later.”)
Download or read book Practical Antenna Design written by Elpidio Latorilla and published by . This book was released on 2009-10-07 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: This authoritative and well-researched book is the only one that will give all of the most important and reliable information on VHF antenna construction techniques. This unique book offers a superb collection of detailed, easy-to-follow, fully illustrated, and tested designs, covering such types of antennas as: omnidirectional antennas, gain-omni antennas, gain-directed beams, portable antennas, Yagi antennas, stacked arrays, stacked collinears, wideband-omni antennas. Packed with detailed drawings, plans, schematics, instructions, material lists, formulas, tips and tricks.Plus, the reader is given and extra chapter on converting the designs for other frequency bands, making it profitable not just for amateurs, but for professionals as well.
Download or read book Electrical Systems and Equipment written by D.J. Littler and published by Elsevier. This book was released on 2014-03-14 with total page 1051 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrical Systems and Equipment is the work of some 50 electrical design specialists in the power engineering field based largely on the work and experience of GDCD's (Generation Development and Constructor Division of the CEGB) Electrical Branch. The volume describes the design philosophies and techniques of power engineering, the solutions to the large number of design problems encountered and the plant which has been chosen and developed to equip electrical systems both within the different types of new power station, and modification tasks at existing stations.
Download or read book The A R R L Antenna Book written by American Radio Relay League and published by . This book was released on 1949 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook for Radio Engineering Managers written by J. F. Ross and published by Elsevier. This book was released on 2014-05-20 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook for Radio Engineering Managers deals with management, organization, engineering economy, safety practices, fires, environmental aspects, specifications, and contract administration of projects. The text explains project management concerning initiation of the planning and design stages, establishment of controls, staffing supervision, installation work, commissioning, and turnover to the operating and maintenance staff. Engineering economy involves cost/benefit analysis, preparation of budget for new installations, maintenance, and repairs. The book also discusses safety practices such as staff responsibilities, aid facilities, electrical or radio equipment, radiation hazards, maintenance of mast and towers. The text discusses fires in radio installations, fire detecting facilities, transformer problems, lighting hazards, and electric shock hazards. The environmental aspects in radio engineering include equipment or materials performance, corrosion, structural failures, environmental obligations in mast or tower design, as well as radio frequency spectrum management. The radio engineering manager should also be knowledgeable regarding specifications and contract administration covering radio engineering specifications, inspection, acceptance tests, and contract administration. The methods and practices explained in the book are applicable for large, medium, or small sized stations or project. The book is a useful reference for radio station managers, radio station technicians, radio engineers, electrical engineers, and for administrators of radio stations or other communications facilities.
Download or read book Railway Signaling and Communications written by and published by . This book was released on 1948 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Antenna Systems written by United States. Department of the Air Force and published by . This book was released on 1953 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
