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Investigation Of Shielding Methods And Materials For Reduction Of Radiofrequency Interference To Backup Emergency Communication Equipment
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Book Synopsis Investigation of Shielding Methods and Materials for Reduction of Radiofrequency Interference to Backup Emergency Communication Equipment by : George C. Apostolakis
Download or read book Investigation of Shielding Methods and Materials for Reduction of Radiofrequency Interference to Backup Emergency Communication Equipment written by George C. Apostolakis and published by . This book was released on 1974 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Backup emergency communication (BUEC) equipment operation in the field has been reported to be impaired by radiofrequency interference (RFI). This RFI enters the BUEC transceiver via its antenna as well as directly through imperfections in the internal shielding of the transceiver itself. Methods of reducing the effect of this RFI by shielding of the antenna and the transceiver itself were studied at the Elwood, New Jersey, Long-Range Radar Site. It was found that the radome catwalk deck itself was an effective shield against both ultrahigh frequency (UHF) and very high frequency (VHF) RFI, and that moving the antenna radially inward from the protective rail of the catwalk provided effective shielding. Additionally, it was found that UHF RFI generated by the common digitizer (CD) was completely eliminated by a 6X6-foot copper mesh screen interposed between the BUEC antenna and the CD, however, this means did not provide complete shielding for VHF interference. Finally, direct RFI leakage into the transceiver appears to be through the front end of the transceiver. (Author).
Book Synopsis Investigation of Shielding Methods and Materials for Reduction of Radiofrequency Interference to Backup Emergency Communication Equipment by :
Download or read book Investigation of Shielding Methods and Materials for Reduction of Radiofrequency Interference to Backup Emergency Communication Equipment written by and published by . This book was released on 1974 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Backup emergency communication (BUEC) equipment operation in the field has been reported to be impaired by radiofrequency interference (RFI). This RFI enters the BUEC transceiver via its antenna as well as directly through imperfections in the internal shielding of the transceiver itself. Methods of reducing the effect of this RFI by shielding of the antenna and the transceiver itself were studied at the Elwood, New Jersey, Long-Range Radar Site. It was found that the radome catwalk deck itself was an effective shield against both ultrahigh frequency (UHF) and very high frequency (VHF) RFI, and that moving the antenna radially inward from the protective rail of the catwalk provided effective shielding. Additionally, it was found that UHF RFI generated by the common digitizer (CD) was completely eliminated by a 6X6-foot copper mesh screen interposed between the BUEC antenna and the CD, however, this means did not provide complete shielding for VHF interference. Finally, direct RFI leakage into the transceiver appears to be through the front end of the transceiver. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1974 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Index written by and published by . This book was released on 1975 with total page 1262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1974 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements by :
Download or read book Government Reports Announcements written by and published by . This book was released on 1974 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Architectural Electromagnetic Shielding Handbook by : Leland H. Hemming
Download or read book Architectural Electromagnetic Shielding Handbook written by Leland H. Hemming and published by John Wiley & Sons. This book was released on 2000-08-02 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first volume ever to cover all aspects of the subject, Architectural Electromagnetic Shielding Handbook provides the practicing architect/engineer with a comprehensive guide to electromagnetic shielding. This practical handbook is a one-stop source for every form of shielding enclosure now used in commercial and government test laboratories, communication and computer centers, and electromagnetic hardened facilities designed to prevent electromagnetic interference (EMI) from reaching either a sensitive piece of equipment or an unauthorized agency. Additional features include: extensive supporting information on penetrations such as doors, vents, piping, and electromagnetic filters for each type of shielding complete descriptions of modular, welded, and architectural forms of shielding as well as design checklists for shielded enclosure installation detailed descriptions of performance specifications and methods of testing necessary to prove performance Now you can have practical design and manufacturing techniques for solving ESD problems associated with sophisticated equipment used in a home or office environment. This book takes the mystery out of ESD by showing how it is generated and how it affects electronic devices, such as integrated circuits. It provides practical guidelines and the rationale on how ESD solutions can work for you.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1974 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Donald D Galloway James E Allgaier Publisher :Hassell Street Press ISBN 13 :9781014314505 Total Pages :664 pages Book Rating :4.3/5 (145 download)
Book Synopsis A Study of the Causes, Control, and Measurement of Man-made Radio Frequency Interference Generated by Non-communication Equipment by : Donald D Galloway James E Allgaier
Download or read book A Study of the Causes, Control, and Measurement of Man-made Radio Frequency Interference Generated by Non-communication Equipment written by Donald D Galloway James E Allgaier and published by Hassell Street Press. This book was released on 2021-09-09 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Book Synopsis RFI/EMI Shielding Materials by : John W. Molyneux-Child
Download or read book RFI/EMI Shielding Materials written by John W. Molyneux-Child and published by Woodhead Publishing Limited. This book was released on 1992 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook on Radio Frequency Interference: Methods of electromagnetic interference free design and interference suppression by :
Download or read book Handbook on Radio Frequency Interference: Methods of electromagnetic interference free design and interference suppression written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation and Study of Communication Interference Reduction Techniques by : Robert Edroy Meek
Download or read book Investigation and Study of Communication Interference Reduction Techniques written by Robert Edroy Meek and published by . This book was released on 1957 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electromagnetic Interference Measurement Methods - Shielded Enclosure by : William R. Free
Download or read book Electromagnetic Interference Measurement Methods - Shielded Enclosure written by William R. Free and published by . This book was released on 1967 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the period covered by this report, investigations of techniques and procedures for making radiation measurements in shielded enclosures which can be correlated with open-field measurements have continued. The primary objective of this program is to develop a capability for determining the case radiation and susceptibility characteristics of U.S. Army communication equipments in the controlled environments of shielded enclosures. A microwave hooded antenna capable of making the desired measurements in a shielded enclosure over the frequency range from 1 to 12 GHz has been developed and evaluated. Techniques for calibrating this probe antenna have been investigated during this period and are described in detail. A UHF hooded antenna, for use over the frequency range from 200 to 1500 MHz, has also been developed. The evaluation of this probe antenna has continued during this period and the results obtained to date are presented. Theoretical and experimental investigations of the field distribution within a shielded enclosure at low frequencies are discussed. (Author).
Book Synopsis Grounding, Bonding, and Shielding for Electronic Equipments and Facilities by : Department of Department of Defense
Download or read book Grounding, Bonding, and Shielding for Electronic Equipments and Facilities written by Department of Department of Defense and published by . This book was released on 2018-03-07 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: MIL-HDBK-419A 29 DECEMBER 1987 Volume 2 of 2 Applications Unfortunately, few Military Handbooks address the need for defense against electromagnetic pulse (EMP) and cybersecurity. While EMP has been thought of as a remote possibility (who in his right mind is going to launch a nuclear weapon of any kind against the U.S.?) Advances in non-nuclear EMP, miniaturization of electronics and autonomous drones suddenly brings EMP into the role of the possible. No longer would an adversary need to risk retaliation when a drone from an unknown source attacks a vital facility. The information in this book is part of the solution to the question "How do we defend against EMP?" List of Applicable EMP and Cybersecurity Publications: MIL-STD-188-125-1 High-altitude electromagnetic pulse (HEMP) Protection For Ground-Based C4I Facilities Performing Critical, Time-Urgent Missions MIL-STD-188-124A Grounding, Bonding and Shielding for Common Long Haul/Tactical Communication Systems MIL-HDBK -1195 Radio Frequency Shielded Enclosures TOP 01-2-620 High-Altitude Electromagnetic Pulse (HEMP) Testing MIL-HDBK-1012/1 Electronic Facilities Engineering MIL-HDBK-1013/1A Design Guidelines for Physical Security of Facilities
Book Synopsis Near-field Scanning Based Shielding Effectiveness Extraction for Board Level Shielding Cans by : Harsh Shrivastav
Download or read book Near-field Scanning Based Shielding Effectiveness Extraction for Board Level Shielding Cans written by Harsh Shrivastav and published by . This book was released on 2019 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The conventional definition of shielding effectiveness is well suited for calculating electromagnetic shielding in the far-field. However, in the near field, shielding effectiveness calculation is not so straight forward. In radio frequency interference problems, most of the field coupling occurs in near field. Having a well-defined method to calculate near-field shielding effectiveness is important for estimating the suppression of radio frequency interference using the shield cans. In this research, a method to extract the shielding effectiveness of board level shielding cans using near field scanning is developed. Shielding effectiveness is defined by modelling the shielded noise source as equivalent dipole moments. Accuracy of the equivalent source is analyzed by using least square error and correlation coefficient as confidence check parameters. Applying reciprocity theorem, the voltage coupled on a PIFA antenna from an unshielded and a shielded source is calculated. Coupled voltage from a shielded noise source serves as the reference and is used to validate the effectiveness of the developed method. Practical shield cans were used to study and develop the shielding effectiveness extraction method using full wave 3D simulations"--Abstract, page iv.
Book Synopsis A handbook on electromagnetic shielding materials and performance by : Donald R. White
Download or read book A handbook on electromagnetic shielding materials and performance written by Donald R. White and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Handbook on Shielding Design Methodology and Procedures by : Donald R. White
Download or read book A Handbook on Shielding Design Methodology and Procedures written by Donald R. White and published by Emf-Emi Control. This book was released on 1986-01-01 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
