FM 24-18. Tactical Single-Channel Radio Communications
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Electronic Warfare Fundamentals
ELECTRONIC WARFARE FUNDAMENTALS NOVEMBER 2000 PREFACE Electronic Warfare Fundamentals is a student supplementary text and reference book that provides the foundation for understanding the basic concepts underlying electronic warfare (EW). This text uses a practical building-block approach to facilitate student comprehension of the essential subject matter associated with the combat applications of EW. Since radar and infrared (IR) weapons systems present the greatest threat to air operations on today's battlefield, this text emphasizes radar and IR theory and countermeasures. Although command and control (C2) systems play a vital role in modern warfare, these systems are not a direct threat to the aircrew and hence are not discussed in this book. This text does address the specific types of radar systems most likely to be associated with a modern integrated air defense system (lADS). To introduce the reader to EW, Electronic Warfare Fundamentals begins with a brief history of radar, an overview of radar capabilities, and a brief introduction to the threat systems associated with a typical lADS. The two subsequent chapters introduce the theory and characteristics of radio frequency (RF) energy as it relates to radar operations. These are followed by radar signal characteristics, radar system components, and radar target discrimination capabilities. The book continues with a discussion of antenna types and scans, target tracking, and missile guidance techniques. The next step in the building-block approach is a detailed description of countermeasures designed to defeat radar systems. The text presents the theory and employment considerations for both noise and deception jamming techniques and their impact on radar systems. -
W5GI MYSTERY ANTENNA (Pdf)
W5GI Mystery Antenna A multi-band wire antenna that performs exceptionally well even though it confounds antenna modeling software Article by W5GI ( SK ) The design of the Mystery antenna was inspired by an article written by James E. Taylor, W2OZH, in which he described a low profile collinear coaxial array. This antenna covers 80 to 6 meters with low feed point impedance and will work with most radios, with or without an antenna tuner. It is approximately 100 feet long, can handle the legal limit, and is easy and inexpensive to build. It’s similar to a G5RV but a much better performer especially on 20 meters. The W5GI Mystery antenna, erected at various heights and configurations, is currently being used by thousands of amateurs throughout the world. Feedback from users indicates that the antenna has met or exceeded all performance criteria. The “mystery”! part of the antenna comes from the fact that it is difficult, if not impossible, to model and explain why the antenna works as well as it does. The antenna is especially well suited to hams who are unable to erect towers and rotating arrays. All that’s needed is two vertical supports (trees work well) about 130 feet apart to permit installation of wire antennas at about 25 feet above ground. The W5GI Multi-band Mystery Antenna is a fundamentally a collinear antenna comprising three half waves in-phase on 20 meters with a half-wave 20 meter line transformer. It may sound and look like a G5RV but it is a substantially different antenna on 20 meters. -
California State University, Northridge
CALIFORNIA STATE UNIVERSITY, NORTHRIDGE Design of a 5.8 GHz Two-Stage Low Noise Amplifier A graduate project submitted in partial fulfillment of the requirements For the degree of Master of Science in Electrical Engineering By Yashika Parwath August 2020 The graduate project of Yashika Parwath is approved: Dr. John Valdovinos Date Dr. Jack Ou Date Dr. Brad Jackson, Chair Date California State University, Northridge ii Acknowledgement I would like to express my sincere gratitude to Dr. Brad Jackson for his unwavering support and mentorship that aided me to finish my master’s project. With his deep understanding of the subject and valuable inputs this design project has been quite a learning wheel expanding my knowledge horizons. I would also like to thank Dr. John Valdovinos and Dr. Jack Ou for being the esteemed members of the committee. iii Table of Contents Signature page ii Acknowledgement iii List of Figures v List of Tables vii Abstract viii Chapter 1: Introduction 1 1.1 Communication System 1 1.2 Low Noise Amplifier 2 1.3 Design Goals 2 Chapter 2: LNA Theory and Background 4 2.1 Introduction 4 2.2 Terminology 4 2.3 Design Procedure 10 Chapter 3: LNA Design Procedure 12 3.1 Transistor 12 3.2 S-Parameters 12 3.3 Stability 13 3.4 Noise and Noise Figure 16 3.5 Cascaded Noise Figure 16 3.6 Noise Circles 17 3.7 Unilateral Figure of Merit 18 3.8 Gain 20 Chapter 4: Source and Load Reflection Coefficient 23 4.1 Reflection Coefficient 23 4.2 Source Reflection Coefficient 24 4.3 Load Reflection Coefficient 26 Chapter 5: Impedance Matching -
Marc Brennan Thesis
Writing to Reach You: The Consumer Music Press and Music Journalism in the UK and Australia Marc Brennan, BA (Hons) Creative Industries Research and Applications Centre (CIRAC) Thesis Submitted for the Completion of Doctor of Philosophy (Creative Industries), 2005 Writing to Reach You Keywords Journalism, Performance, Readerships, Music, Consumers, Frameworks, Publishing, Dialogue, Genre, Branding Consumption, Production, Internet, Customisation, Personalisation, Fragmentation Writing to Reach You: The Consumer Music Press and Music Journalism in the UK and Australia The music press and music journalism are rarely subjected to substantial academic investigation. Analysis of journalism often focuses on the production of news across various platforms to understand the nature of politics and public debate in the contemporary era. But it is not possible, nor is it necessary, to analyse all emerging forms of journalism in the same way for they usually serve quite different purposes. Music journalism, for example, offers consumer guidance based on the creation and maintenance of a relationship between reader and writer. By focusing on the changing aspects of this relationship, an analysis of music journalism gives us an understanding of the changing nature of media production, media texts and media readerships. Music journalism is dialogue. It is a dialogue produced within particular critical frameworks that speak to different readers of the music press in different ways. These frameworks are continually evolving and reflect the broader social trajectory in which music journalism operates. Importantly, the evolving nature of music journalism reveals much about the changing consumption of popular music. Different types of consumers respond to different types of guidance that employ a variety of critical approaches. -
Radio Communications in the Digital Age
Radio Communications In the Digital Age Volume 1 HF TECHNOLOGY Edition 2 First Edition: September 1996 Second Edition: October 2005 © Harris Corporation 2005 All rights reserved Library of Congress Catalog Card Number: 96-94476 Harris Corporation, RF Communications Division Radio Communications in the Digital Age Volume One: HF Technology, Edition 2 Printed in USA © 10/05 R.O. 10K B1006A All Harris RF Communications products and systems included herein are registered trademarks of the Harris Corporation. TABLE OF CONTENTS INTRODUCTION...............................................................................1 CHAPTER 1 PRINCIPLES OF RADIO COMMUNICATIONS .....................................6 CHAPTER 2 THE IONOSPHERE AND HF RADIO PROPAGATION..........................16 CHAPTER 3 ELEMENTS IN AN HF RADIO ..........................................................24 CHAPTER 4 NOISE AND INTERFERENCE............................................................36 CHAPTER 5 HF MODEMS .................................................................................40 CHAPTER 6 AUTOMATIC LINK ESTABLISHMENT (ALE) TECHNOLOGY...............48 CHAPTER 7 DIGITAL VOICE ..............................................................................55 CHAPTER 8 DATA SYSTEMS .............................................................................59 CHAPTER 9 SECURING COMMUNICATIONS.....................................................71 CHAPTER 10 FUTURE DIRECTIONS .....................................................................77 APPENDIX A STANDARDS -
Understanding the Cavity Duplexer
i THE CAVITY DUPLEXER John E Portune W6NBC [email protected] rev 2019 NOTE FROM AUTHOR This book was written several years ago and based on hardware-store copper water pipe as the source of home-brew duplexer construction materials. Later I began making from spun-aluminum commercial cake pans. Both require no welding. Unfortunately the price of copper is today much higher. Cake pans, however, are still reasonably priced, readily available and very acceptable as the basis especially for VHF cavities. Because of maximum cavity size limit, copper water pipe may still be indicated for UHF and above. In any case, how a duplexer operates is basic physics. No matter what the material, or whether the duplexer is commercial or home brew, the principles herein are universal to duplexer construction, modification and tuning. This book, however, is not finished. Repeater building is no longer my primary interest in ham radio. Some subjects could be added. But as it contains the essentials, I have placed on the internet incomplete. If you reproduce it, be so kind as to give proper author’s credits. W6NBC January 2019 . ii CHAPTER OUTLINE 1. The Mysterious Duplexer • The black box everybody uses but nobody understands • Keys to understanding it • This is not a cookbook 2. Let’s Make a Cavity • Home-brew 2M aluminum cavity • Example for the entire book • The best way to learn 3. Cavities • Mechanical and electrical properties of cavities • Basic structure of a duplexer • Why use cavities • Getting energy in and out: loops, probes, taps and ports • Three cavity types: Bp, Br, Bp/Br • Creating the other types • Helical resonators for 6M and 10M duplexers 4. -
History of Radio Broadcasting in Montana
University of Montana ScholarWorks at University of Montana Graduate Student Theses, Dissertations, & Professional Papers Graduate School 1963 History of radio broadcasting in Montana Ron P. Richards The University of Montana Follow this and additional works at: https://scholarworks.umt.edu/etd Let us know how access to this document benefits ou.y Recommended Citation Richards, Ron P., "History of radio broadcasting in Montana" (1963). Graduate Student Theses, Dissertations, & Professional Papers. 5869. https://scholarworks.umt.edu/etd/5869 This Thesis is brought to you for free and open access by the Graduate School at ScholarWorks at University of Montana. It has been accepted for inclusion in Graduate Student Theses, Dissertations, & Professional Papers by an authorized administrator of ScholarWorks at University of Montana. For more information, please contact [email protected]. THE HISTORY OF RADIO BROADCASTING IN MONTANA ty RON P. RICHARDS B. A. in Journalism Montana State University, 1959 Presented in partial fulfillment of the requirements for the degree of Master of Arts in Journalism MONTANA STATE UNIVERSITY 1963 Approved by: Chairman, Board of Examiners Dean, Graduate School Date Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. UMI Number; EP36670 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. UMT Oiuartation PVUithing UMI EP36670 Published by ProQuest LLC (2013). -
The Crossing of Heaven
The Crossing of Heaven Memoirs of a Mathematician Bearbeitet von Karl Gustafson, Ioannis Antoniou 1. Auflage 2012. Buch. xvi, 176 S. Hardcover ISBN 978 3 642 22557 4 Format (B x L): 15,5 x 23,5 cm Gewicht: 456 g Weitere Fachgebiete > Mathematik > Numerik und Wissenschaftliches Rechnen > Angewandte Mathematik, Mathematische Modelle Zu Inhaltsverzeichnis schnell und portofrei erhältlich bei Die Online-Fachbuchhandlung beck-shop.de ist spezialisiert auf Fachbücher, insbesondere Recht, Steuern und Wirtschaft. Im Sortiment finden Sie alle Medien (Bücher, Zeitschriften, CDs, eBooks, etc.) aller Verlage. Ergänzt wird das Programm durch Services wie Neuerscheinungsdienst oder Zusammenstellungen von Büchern zu Sonderpreisen. Der Shop führt mehr als 8 Millionen Produkte. 4. Computers and Espionage ...and the world’s first spy satellite... It was 1959 and the Cold War was escalating steadily, moving from a state of palpable sustained tension toward the overt threat to global peace to be posed by the 1962 Cuban Missile Crisis – the closest the world has ever come to nuclear war. Quite by chance, I found myself thrust into this vortex, involved in top-level espionage work. I would soon write the software for the world’s first spy satellite. It was a summer romance, in fact, that that led me unwittingly to this particular role in history. In 1958 I had fallen for a stunning young woman from the Washington, D.C., area, who had come out to Boulder for summer school. So while the world was consumed by the escalating political and ideological tensions, nuclear arms competition, and Space Race, I was increasingly consumed by thoughts of Phyllis. -
Ky-57 Vinson
KY-57 VINSON Homepage Crypto KY-57 (VINSON) Index Voice encryption unit Enigma The KY-57 was a wide-band voice encryption unit that was developed in the USA during the 1970s as a replacement of the NESTOR cryptographic products, such as the KY-38. It was suitable for use with a Hagelin wide range of military radios and telehone lines. As part of the VINSON family of devices, it was the main Fialka crypto 'workhorse' of the US Army during the 1980s. Even today, many radios and voice encryption devices are still backwards compatible with the KY-57, that is also known as the TSEC/KY-57. The Siemens airborne version of the KY-57 is called the KY-58. Philips The KY-57 uses the NSA-developed Type-1 KY-57 voice encryption unit Nema SAVILLE cryptographic algorithm. When used in combination with a radio transceiver, such as the Racal SINCGARS non-ICOM RT-1439/VRC, the KY-57 STK allows signal fades or losses for up to 12 seconds without losing synchronization. Transvertex The KY-57 was eventually superceeded by the KY- Gretag 99 that offered newer - more advanced - Telsy cryptographic algorithms, but that was still backwards compatible with the KY-57. Later Tadiran SINCGARS ICOM radios, such as the RT-1523, had built-in KY-57 (VINSON) compatibility. USA USSR Both voice and data can be encrypted with the KY-57. Voice data is digitized using Continuous Variable Slope Delta modulation (CVSD), similar to other voice crypto systems of the same era, such as the UK Philips Spendex-10 , the Spendex 50 and the Telsy TS-500. -
Spring 2006 Bulletin 85
Advertisements Diary Dates Please refer to VLV when responding to advertisements. VLV Ltd cannot accept any liability or complaint in regard to the following offers. The charge for classified advertisements is 30p per word, 20p for Wednesday 26 April members. Please send typed copy with a cheque made payable to VLV Ltd. For display space please VLV Spring Conference contact Linda Forbes on 01474 352835. The Royal Society, London SW1 10.30am – 5.00pm The Radio Listener's Guide 2006 The Television Viewer's Guide 2006 Wednesday 26 April Presentation of VLV’s Awards G 160 pages G 160 pages for Excellence In Broadcasting G Frequencies for all BBC and commercial radio G Digital TV details of what you need to pick up Sky, The Royal Society, London SW1 stations, plus DAB digital transmitter details. Freeview or cable 1.45pm – 2.30pm G Radio Reviews Independent reviews of over G Transmitter sites for all analogue and digital Thursday, 11 May 130 radios including DAB digital radios. television transmitters. An Evening with Joan Bakewell G News from both BBC and commercial radio stations. G Equipment advice covering TV sets, VCRs, DVD One Whitehall Place, players and recorders, Sky and Freeview. G Digital Radio (DAB) The latest news and information. London SW1 G Freeview set-top box guide. 6.30pm – 8.20pm G Sky and Freeview radio information and G channel lists. Channel lists for Sky and Thursday, 18 May Freeview. VLV Evening Seminar with Mark G Advice showing how to get the G Thompson, BBC Director General best from your radio. -
Using High Frequency Propagation to Calculate Basic Maximum Usable Frequency
Using High Frequency Propagation to Calculate Basic Maximum Usable Frequency Israa Abdualqassim Mohammed Ali* * University of Baghdad, College of Science, Baghdad, Iraq Received: XX 20XX / Accepted: XX 20XX / Published online: ABSTRACT A comparison between observed (obs.) digital ionospheric sounding data and predicted (pre.) using International Reference Ionosphere (IRI) model for critical frequency (foF2) and Basic Maximum Usable Frequency (BMUF) of ionospheric F2-Layer has been made. A mid-latitude region selected for this research work by using data from station Wakkanai (45.38o N, 141.66o E). This study included 12 monthly median data from year (2001, R12=111) selected for high Sunspot number (SSN) and years for low SSN (2004, R12=44) and (2005, R12=29). Frequency parameters foF2 reveals that there is a good correlation between observed and predicted except for January of years 2001 and 2004, and BMUF revealed that there is a good correlation between observed and predicted for years of low SSN and all months except in month 1, 9 and 12 of year 2004, for year 2001 of high SSN there is a bad correlation. A correction factor as a function of time used from fitting technique to correct the predicted value with observed value of BMUF for year 2001. Keywords: Ionosphere; foF2; M3000F2; BMUF Author Correspondence, e-mail: [email protected] 1. INTRODUCTION The maximum usable frequency (MUF) is important ionospheric parameter for radio users because of its role in radio frequency management and for providing a good communication 1 link between two locations (Athieno et al., 2015; Suparta et al., 2018). -
8200.1D United States Standard Flight Inspection Manual
DEPARTMENT OF THE ARMY TECHNICAL MANUAL TM 95-225 DEPARTMENT OF THE NAVY MANUAL NAVAIR 16-1-520 DEPARTMENT OF THE AIR FORCE MANUAL AFMAN 11-225 FEDERAL AVIATION ADMINISTRATION ORDER 8200.1D UNITED STATES STANDARD FLIGHT INSPECTION MANUAL April 2015 DEPARTMENTS OF THE ARMY, THE NAVY, AND THE AIR FORCE AND THE FEDERAL AVIATION ADMINISTRATION DISTRIBUTION: Electronic Initiated By: AJW-331 RECORD OF CHANGES DIRECTIVE NO. 8200.1D CHANGE SUPPLEMENTS OPTIONAL CHANGE SUPPLEMENTS OPTIONAL TO TO BASIC BASIC The material contained herein was formerly issued as the United States Standard Flight Inspection Manual, dated December 1956. The second edition incorporated the technical material contained in the United States Standard Flight Inspection Manual and revisions thereto and was issued as the United States Standard Facilities Flight Check Manual, dated December 1960. The third edition superseded the second edition of the United States Standard Facilities Flight Check Manual; Department of Army Technical Manual TM-11-2557-25; Department of Navy Manual NAVWEP 16-1-520; Department of the Air Force Manual AFM 55-6; United States Coast Guard Manual CG-317. FAA Order 8200.1A was a revision of the third edition of the United States Standard Flight Inspection Manual, FAA OA P 8200.1; Department of the Army Technical Manual TM 95-225; Department of the Navy Manual NAVAIR 16-1-520; Department of the Air Force Manual AFMAN 11-225; United States Coast Guard Manual CG-317. FAA Order 8200.1B, dated January 2, 2003, was a revision of FAA Order 8200.1A. FAA Order 8200.1C, dated October 1, 2005, was a revision of FAA Order 8200.1B.