Monitoring Times 2000 INDEX
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A Weather Vane Antenna for 2 Meters VHF Incognito! Here’S a 2 Meter Antenna Figure 1—The Completed Weather Vane Your Neighbors Won’T Recognize
John Portune, W6NBC, and Fred Adams, WD6ACJ A Weather Vane Antenna for 2 Meters VHF incognito! Here’s a 2 meter antenna Figure 1—The completed weather vane your neighbors won’t recognize. antenna. Can you find the loop? eeping a homeowners’ association happy isn’t easy. criminate than a dipole or J-pole. [While horizontal loops do bet- Many hams burdened with CC&Rs often live with ter in noisy situations because that local noise tends to be mainly Kbadly compromised antennas. Why not combine a com- E-field oriented, the perceived SNR improvement of a narrow- pact magnetic loop with a functional weather vane and put band antenna is principally due to the reduction in out-of-band high-performance right out in full view? A neighbor even asked signals that cause IMD, rather than any reduction of the receiver me where I got mine, so she could get one, too. noise floor.—Ed.] They also tend to work better close to the ground Compact loops, often called magnetic loops, have been or near other objects. around for years. They’re tiny open-ended ring radiators, al- 1 ways less than roughly /10th wavelength in diameter. Recently Construction we’ve seen them mostly on HF where their small size is of All materials (Figures 3A and 3B) are common hardware store great appeal. But they work very well on other bands too; here items. I recommend a tubing cutter for cutting the pipe, copper on 2 meters. Remarkably, this VHF ver- and PVC. Also, a different brand of copper sion achieves an efficiency of 93%, yet fittings may require slight adjustments to radiates as if it were a full-sized dipole the cutting dimensions shown. -
FCC Encyclopedia / Why AM Radio Stations Must Reduce Power, Change Operations, Or Cease
Why AM Radio Stations Must Reduce Power, Change Operations, or Cease Broadcasting at Night | FCC.gov Federal Communications Commission The FCC Our Work Tools & Data Business & Licensing Bureaus & Offices Search Take Action Comment, Complain, Discuss Transition FCC.gov Home / The FCC / FCC Encyclopedia / Why AM Radio Stations Must Reduce Power, Change Operations, or Cease... FCC Encyclopedia Print Email FCC Highlights Why AM Radio Stations Must Reduce Power, Change Operations, or Cease Broadcasting at Night FY 2013 Regulatory Fees Most AM radio stations are required by the FCC's rules to reduce their power or cease operating at night in order to avoid interference to other AM stations. FCC rules governing the daytime and nighttime operation of AM radio stations are a consequence of the laws of physics. Because of the way in which the relatively long wavelengths (see FY 2013 Regulatory Fees are due by Footnote 1) of AM radio signals interact with the ionized layers of the ionosphere miles 11:59 p.m. Eastern Time, Sept. 20 above the earth's surface, the propagation of AM radio waves changes drastically from 2013. daytime to nighttime. This change in AM radio propagation occurs at sunset due to 20, 2013 radical shifts in the ionospheric layers, which persist throughout the night. During on September daytime hours when ionospheric reflection does not occur to any great degree,archived AM signals 11-17483 Quick Links travel principally by conduction over the surface of the earth.No. This is known as Inc. "groundwave" propagation. Useful daytime AM service is generally limited to a radius of v. -
Micro-Broadcasting: License-Free Campus Radio in This Issue: • Carey Junior High School ARC • WEFAX Reception on an Ipad • MT Reviews: MFJ Mini-Frequency Counter
www.monitoringtimes.com Scanning - Shortwave - Ham Radio - Equipment Internet Streaming - Computers - Antique Radio ® Volume 30, No. 9 September 2011 U.S. $6.95 Can. $6.95 Printed in the United States A Publication of Grove Enterprises Micro-Broadcasting: License-Free Campus Radio In this issue: • Carey Junior High School ARC • WEFAX Reception on an iPad • MT Reviews: MFJ Mini-Frequency Counter CONTENTS Vol. 30 No. 9 September 2011 CQ DX from KC7OEK .................................................... 12 www.monitoringtimes.com By Nick Casner K7CAS, Cole Smith KF7FXW and Rayann Brown KF7KEZ Scanning - Shortwave - Ham Radio - Equipment Internet Streaming - Computers - Antique Radio Eighteen years ago Paul Crips KI7TS and Bob Mathews K7FDL wrote a grant ® Volume 30, No. 9 September 2011 U.S. $6.95 through the Wyoming Department of Education that resulted in the establishment Can. $6.95 Printed in the United States A Publication of Grove Enterprises of an amateur radio club station at Carey Junior High School in Cheyenne, Wyoming, known on the air as KC7OEK. Since then some 5,000 students have been introduced to amateur radio; nearly 40 students have been licensed, and last year there were 24 students in the club, seven of whom were ready to test for their own amateur radio licenses. In this article, Carey Junior High School students Nick, Cole and Rayann, all three of whom have received their licenses, relate their experiences with amateur radio both on and off the air. While older hams many times their ages are discouraged Micro-Broadcasting: about the direction of the hobby, these students let us all know that the future of License-Free Campus Radio amateur radio is already in good hands. -
High Frequency Communications – an Introductory Overview
High Frequency Communications – An Introductory Overview - Who, What, and Why? 13 August, 2012 Abstract: Over the past 60+ years the use and interest in the High Frequency (HF -> covers 1.8 – 30 MHz) band as a means to provide reliable global communications has come and gone based on the wide availability of the Internet, SATCOM communications, as well as various physical factors that impact HF propagation. As such, many people have forgotten that the HF band can be used to support point to point or even networked connectivity over 10’s to 1000’s of miles using a minimal set of infrastructure. This presentation provides a brief overview of HF, HF Communications, introduces its primary capabilities and potential applications, discusses tools which can be used to predict HF system performance, discusses key challenges when implementing HF systems, introduces Automatic Link Establishment (ALE) as a means of automating many HF systems, and lastly, where HF standards and capabilities are headed. Course Level: Entry Level with some medium complexity topics Agenda • HF Communications – Quick Summary • How does HF Propagation work? • HF - Who uses it? • HF Comms Standards – ALE and Others • HF Equipment - Who Makes it? • HF Comms System Design Considerations – General HF Radio System Block Diagram – HF Noise and Link Budgets – HF Propagation Prediction Tools – HF Antennas • Communications and Other Problems with HF Solutions • Summary and Conclusion • I‟d like to learn more = “Critical Point” 15-Aug-12 I Love HF, just about On the other hand… anybody can operate it! ? ? ? ? 15-Aug-12 HF Communications – Quick pretest • How does HF Communications work? a. -
American Forces Network Radio Programming Decisions (D-2006-117)
September 27, 2006 Information Technology Management American Forces Network Radio Programming Decisions (D-2006-117) Department of Defense Office of Inspector General Quality Integrity Accountability Additional Copies To obtain additional copies of this report, visit the Web site of the Department of Defense Inspector General at http://www.dodig.mil/audit/reports or contact the Secondary Reports Distribution Unit at (703) 604-8937 (DSN 664-8937) or fax (703) 604-8932. Suggestions for Future Audits To suggest ideas for or to request future audits, contact the Office of the Deputy Inspector General for Auditing at (703) 604-8940 (DSN 664-8940) or fax (703) 604-8932. Ideas and requests can also be mailed to: ODIG-AUD (ATTN: Audit Suggestions) Department of Defense Inspector General 400 Army Navy Drive (Room 801) Arlington, VA 22202-4704 Acronyms AFIS American Forces Information Service AFN American Forces Network AFRTS American Forces Radio and Television Service AFN-BC American Forces Network - Broadcast Center ASD(PA) Assistant Secretary of Defense (Public Affairs) OIG Office of Inspector General Department of Defense Office of Inspector General Report No. D-2006-117 September 27, 2006 (Project No. D2006-D000FI-0103.000) American Forces Network Radio Programming Decisions Executive Summary Who Should Read This Report and Why? This report will be of interest to DoD personnel responsible for the selection and distribution of talk-radio programming to overseas U.S. Forces and their family members and military personnel serving onboard ships. The report discusses the controls and processes needed for establishing a diverse inventory of talk-radio programming on American Forces Network Radio. -
O, Nitoring a Publication of Game Enee + Rises
Vol. 15, No. 8 August 1996 Your Personal Communications Source ) . o, nitoring A Publication of Game Enee + rises, ing ómß Thl o hone I We Eher 08 MT Reviews Drake SW -1 Air Force Goes to Zulu Plan o 33932 74654 s z Giant List of Fast Food Freqs www.americanradiohistory.com The offers All Mode Communications Decoding. 46L72. 11Hz UCH: 103.5 Hz CTCSS Mode 461.725 MHz )C,:. E4i' DCS Mode 461 . ''ç, MHz Nearfield Receiver _ High Speed FM Communications )TMF: 8003279912 sweeps range of 30MHz to 2GHz in less than one DTMF Mode second Two line character LCD displays Frequency and either. Additional Display Modes: All Mode Decoding (CTCSS, DCS, DTMF), LTR-Trunk- Latitude/Longitude Mode ing. Relative Signal Strength, Latitude and Longitude, or Signal Strength Mode FM Deviation with automatic backlight Deviation Mode NMEA -0183 GPS Interface provides tagging data with LTR -Trunking Mode location for mapping applications* CI -v compliant Serial Data Interface with both TTL and RS232C levels Frequency Recording Memory Register logs 500 frequencies with Time, Date, Latitude, and Longitude information Real -Time Clock/Calander with battery back -up Frequency Lock Out, Manual Skip, and Auto or Manual Ho capability Tape Control Output with Tape Recorder Pause control relay and DTMF Encoder for audio data recording INNOVATIVE PRODUCT Rotary Encoder for easy selection of menus for setup Internal Speaker, Audio earphone/headphone jack FOR A MODERN Miniature 8 -pin DIN Serial Interface port for PC connection PLANET Relative ten segment Signal Strength Bargraph Mode Numerical Deviation Mode with 1 -10kHz and 10- 100kHz ranges - - ODUCTORY PRICE Includes Built -in Rapid Charge NiCad Batteries with 8 hour.dischargë: time and a Universal Power Supply *Software for mapping applications is planned by third party Software Design Companies. -
GARRISONS EXTRAS Inside This Issue
November 10, 2017 Published by U.S. Army IMCOM for those serving in the Republic of Korea Volume 18, lssue 2 Read the latest news from the Army in Korea online at: www.Army.mil The President of the United States, Donald J. Trump speaks with Army Sgt. Jerrell Knight during lunch at Camp Humphreys Nov. 7 as part of a 12-day tour of Southeast Asia. Trump then received a theater briefing from Gen. Vincent K. Brooks, Commander U.S. Forces Korea at Eighth Army Headquarters. — Department of Defense photo by Staff Sgt. Marcus Fichtl, Defense Media Activity, courtesy of Stars and Stripes Trump visits Camp Humphreys The President of the United States, Donald J. Trump and the President of the Republic of Korea, Moon Jae In, dine with United States Forces Korea service members, Korean Augmentees to the United States Army and Republic of Korea Forces at the Provider Grill, Camp Humphreys Nov. 7 as part of Trump’s 12-day tour of Southeast Asia. Following lunch Gen. Vincent K. Brooks, commander of USFK gave Trump a theater briefing at the Eighth Army headquarters. Trump will continue his tour where he will participate in a series of bilateral, multilateral and cultural engagements demonstrating continued commitment to the alliances and partnerships of the United States in the region. — U.S. Army photo by Bob McElroy, USAG Humphreys Public Affairs Inside this Issue: GARRISONS EXTRAS Man on the street Page 08 USAG RED Cloud/Casey Page 04 Air Assault Page 06 Fire prevention Page 10 USAG Yongsan Page 10 Combined Federal Campaign Page 14 Tobacco cessation Page 18 USAG Humphreys Page 18 DMZ tours Page 16 MP NCO of the year Page 26 USAG Daegu Page 24 Military Spouse of the Year Page 30 Page 2 MORNING CALM www.army.mil The Sgt. -
Radiation Performance of Log Periodic Koch Fractal Antenna Array with Different Materials and Thickness
Journal of Scientific & Industrial Research Vol. 77, May 2018, pp. 276-281 Radiation Performance of Log Periodic Koch Fractal Antenna Array with Different Materials and Thickness V Dhana Raj1*, A Mallikarjuna Prasad2 and G M V Prasad3 *1,2Department of Electronics and Communication Enggineering, JNTUK, Kakinada, A. P, India 3Department of Electronics and Communication Enggineering, BVCITS, Amalapuram, A. P, India Received 13 February 2017; revised 19 September 2017; accepted 22 January 2018 A frequency independent Printed Log Periodic Dipole antenna (PLPDA) with and without fractals for different materials and thickness is proposed for UWB applications. The impedance bandwidth of PLPD without fractal for FR4 of 4.71GHz to 9.99GHz. Similarly, for the RT/Duroid, the impedance bandwidth of 3.09GHz to 12.13GHz with VSWR less than two is achieved. The radiation patterns for different combinations are also observed to be an end-fire radiation pattern. In this paper, the first iteration is proposed, the parametric and performance observations are also made for different thickness (63mil, 62mil, and 31mil) of the dielectric substrate. Antennas are fabricated, and its performance is authenticated using vector network analyzer (E5071C) to carry out return loss and VSWR measurements. The obtained results are insensible agreement with the theoretical results. Keywords: UWB Ultra Wide Band , S-parameter, VSWR Voltage Standing Wave Ratio, FR4, RT/Duroid, Koch fractal Introduction fractal concepts in log periodic antennas to realize An antenna is often explicated as a transformation communication, reported in earlier literature6. structure between the free space and a guiding device. In 1950, Isbell et al. have first introduced the log PLPDA design considerations periodic antenna and depicted various curves relating In the proposed PLPDA, 10 elements were σ, τ and antenna gain for the LPDA antenna design1. -
Minority Commercial Radio Broadcasters Sandoval MMTC 2009 Final Report
1 Minority Commercial Radio Ownership in 2009: FCC Licensing and Consolidation Policies, Entry Windows, and the Nexus Between Ownership, Diversity and Service in the Public Interest By CATHERINE J.K. SANDOVAL Assistant Professor Santa Clara University School of Law November 2009 Study Conducted through a Research Partnership between The Minority Media and Telecommunications Council, David Honig, Executive Director; Catherine J.K. Sandoval, Assistant Professor, Santa Clara University School of Law; Allen S. Hammond, IV, Professor, Santa Clara University School of Law Supported by Funding from the Social Sciences Research Council, Necessary Knowledge for a Democratic Public Sphere 2 Minority Commercial Radio Ownership in 2009: FCC Licensing and Consolidation Policies, Entry Windows, and the Nexus Between Ownership, Diversity and Service in the Public Interest CATHERINE J.K. SANDOVAL1 I. Introduction: Minority Commercial Radio Ownership and the Public Interest This study examines more than 11,000 records from the Federal Communications Commission’s (FCC) Consolidated Database System (CDBS) and Internet sources on radio ownership and program formats in mid-2009 to analyze the effect of FCC licensing and multiple ownership policies on minority ownership of commercial radio stations, program diversification, and service to the American public.2 This analysis is timely and important as the FCC prepares for its quadrennial review of broadcasting rules in 2010, mandated by the Telecommunications Act of 1996 (§202(h)). Analyzing media ownership is critical because "[i]t is upon ownership that public policy places primarily reliance with respect to diversification of content, and that has proven to be significantly influential with respect to editorial comment and the presentation of news" (TV9, 1994, p. -
An Electrically Small Multi-Port Loop Antenna for Direction of Arrival Estimation
c 2014 Robert A. Scott AN ELECTRICALLY SMALL MULTI-PORT LOOP ANTENNA FOR DIRECTION OF ARRIVAL ESTIMATION BY ROBERT A. SCOTT THESIS Submitted in partial fulfillment of the requirements for the degree of Master of Science in Electrical and Computer Engineering in the Graduate College of the University of Illinois at Urbana-Champaign, 2014 Urbana, Illinois Adviser: Professor Jennifer T. Bernhard ABSTRACT Direction of arrival (DoA) estimation or direction finding (DF) requires mul- tiple sensors to determine the direction from which an incoming signal orig- inates. These antennas are often loops or dipoles oriented in a manner such as to obtain as much information about the incoming signal as possible. For direction finding at frequencies with larger wavelengths, the size of the array can become quite large. In order to reduce the size of the array, electri- cally small elements may be used. Furthermore, a reduction in the number of necessary elements can help to accomplish the goal of miniaturization. The proposed antenna uses both of these methods, a reduction in size and a reduction in the necessary number of elements. A multi-port loop antenna is capable of operating in two distinct, orthogo- nal modes { a loop mode and a dipole mode. The mode in which the antenna operates depends on the phase of the signal at each port. Because each el- ement effectively serves as two distinct sensors, the number of elements in an DoA array is reduced by a factor of two. This thesis demonstrates that an array of these antennas accomplishes azimuthal DoA estimation with 18 degree maximum error and an average error of 4.3 degrees. -
Analysis of Nonlinear Fractal Optical Antenna Arrays — a Conceptual Approach
Progress In Electromagnetics Research B, Vol. 56, 289{308, 2013 ANALYSIS OF NONLINEAR FRACTAL OPTICAL ANTENNA ARRAYS | A CONCEPTUAL APPROACH Mounissamy Levy1, 2, *, Dhamodharan Sriram Kumar1, and Anh Dinh2 1National Institute of Technology, Tiruchirappalli 620015, India 2University of Saskatchewan, Saskatoon, SK S7N 5A9, Canada Abstract|Fractal antennas have undergone dramatic changes since they were ¯rst considered for wireless systems. Numerous advancements are developed both in the area of fractal shaped elements and fractal antenna array technology for fractal electrodynamics. This paper makes an attempt of applying the concept of fractal antenna array technology in the RF regime to optical antenna array technology in the optical regime using nonlinear array concepts. The paper further discusses on the enhancement of nonlinear array characteristics of fractal optical antenna arrays using nonlinearities in coupled antennas and arrays in a conceptual manner. 1. INTRODUCTION Nonlinear Antennas were extremely complicated in analysis, design and expensive [1]. In the 1980's and 1990's, however, came the development of antenna and antenna array concepts for commercial systems, and increases in digital signal processing complexity that pushed single antenna wireless systems close to their theoretical (Shannon) capacity. Nonlinear antennas are now seen as one of the key concept to further, many-fold, increase in both the link capacity, through pattern tailoring, spatial multiplexing, and system capacity, through interference suppression and beam forming, as well as increasing coverage and robustness for antenna designs. Furthermore, decreases in integrated circuit cost and antenna advancements have made these antennas attractive in terms of both cost and implementation even on small devices. Therefore an exponential growth have been seen in nonlinear antenna research, the inclusion Received 26 September 2013, Accepted 6 November 2013, Scheduled 8 November 2013 * Corresponding author: Mounissamy Levy (levy [email protected]). -
Dawnco Low-Cost Upgrades Improve Reception DW – Discrete Wide 10
SES SES SES SES SES SES SES SES SES Intelsat SES SES SES SES Americom Americom Americom Americom Intelsat Intelsat Intelsat Intelsat Intelsat Americom Americom Americom Americom Intelsat Intelsat Americom Intelsat Galaxy 13/ Intelsat Americom Intelsat Americom Americom Americom AMC-6 Horizons-2 AMC-5 AMC-9 AMC-3 Galaxy 28 Galaxy 17 Galaxy 3C Galaxy 19 Galaxy 16 AMC-2 AMC-4 AMC-1 AMC-18 Galaxy 23 Galaxy 18 AMC-21 Galaxy 14 Horizons-1 Galaxy 27 AMC-11 Galaxy 15 AMC-10 AMC-7 AMC-8 72° WL 74.05° WL 78.95° WL 83° WL 87° WL 89° WL 91° WL 95.05° WL 97° WL 99° WL 100.95° WL 101° WL 103° WL 104.95° WL 121° WL 123° WL 124.9° WL 125° WL 127° WL 129° WL 131° WL 133° WL 135° WL 137° WL 139° WL C-band video satellites C-/Ku-band video satellites Ku-band video satellites SES Americom AMC-18 Intelsat Galaxy 23 SES Americom AMC-10 SES Americom AMC-6 SES Americom AMC-1 Intelsat Galaxy 28 Intelsat Galaxy 3C Intelsat Galaxy 16 SES Americom AMC-5 SES Americom AMC-21 Horizons-2 • 104.95° WL • 121° WL • 135° WL • 72° WL • 103* WL • 89° WL • 95.05° WL • 99° WL • 78.95° WL • 124.9° WL • 74.05° WL • Projected EOL: January 2022 • Projected EOL: August 2018 • Projected EOL: February 2019 • Projected EOL: December 2015 • Projected EOL: September 2011 • Projected EOL: June 2020 • Projected EOL: September 2020 • Projected EOL: August 2021 • Projected EOL: November 2010 • Projected EOL: October 2023 • Projected EOL: February 2023 • C-band – SSPA power: 20 watts • C-band – LTWTA power: 37 watts @ 36 MHz • C-band – SSPA power: 20 watts • C-band – SSPA power: 20 watts