Vhf Uhf Fixed Station Mast Mounted Antennas System
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Vhf Uhf Fixed Station Mast Mounted Antennas System
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Author :
language : en
Publisher:
Release Date : 1998
Vhf Uhf Fixed Station Mast Mounted Antennas System written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
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.
Vhf And Uhf Antennas
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Author : R. A. Burberry
language : en
Publisher: IET
Release Date : 1992
Vhf And Uhf Antennas written by R. A. Burberry and has been published by IET this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Technology & Engineering categories.
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
Fixed And Base Station Antennas
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Author : National Institute of Justice (U.S.)
language : en
Publisher:
Release Date : 1998
Fixed And Base Station Antennas written by National Institute of Justice (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Mobile radio stations categories.
Modern Power Station Practice
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Author : P.M. Reynolds
language : en
Publisher: Elsevier
Release Date : 2013-10-22
Modern Power Station Practice written by P.M. Reynolds and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Technology & Engineering categories.
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.
Ham Radio For Dummies
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Author : H. Ward Silver
language : en
Publisher: John Wiley & Sons
Release Date : 2004-04-12
Ham Radio For Dummies written by H. Ward Silver and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-04-12 with Technology & Engineering categories.
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.”)
Antenna System Guide
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Author :
language : en
Publisher:
Release Date : 2001
Antenna System Guide written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Antennas (Electronics) categories.
Electrical Systems And Equipment
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Author : D.J. Littler
language : en
Publisher: Elsevier
Release Date : 2014-03-14
Electrical Systems And Equipment written by D.J. Littler and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-03-14 with Technology & Engineering categories.
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.
Handbook For Radio Engineering Managers
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Author : J. F. Ross
language : en
Publisher: Elsevier
Release Date : 2014-05-20
Handbook For Radio Engineering Managers written by J. F. Ross and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-05-20 with Technology & Engineering categories.
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.
Operator S And Organizational Maintenance Manual
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Author :
language : en
Publisher:
Release Date : 1991
Operator S And Organizational Maintenance Manual written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Radio categories.
Radio Receivers For Systems Of Fixed And Mobile Communications
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Author : Vasiliy V. Logvinov
language : en
Publisher: Springer Nature
Release Date : 2022-05-13
Radio Receivers For Systems Of Fixed And Mobile Communications written by Vasiliy V. Logvinov and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-13 with Technology & Engineering categories.
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.