The Development of HF Broadcast Antennas
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Array Designs for Long-Distance Wireless Power Transmission: State
INVITED PAPER Array Designs for Long-Distance Wireless Power Transmission: State-of-the-Art and Innovative Solutions A review of long-range WPT array techniques is provided with recent advances and future trends. Design techniques for transmitting antennas are developed for optimized array architectures, and synthesis issues of rectenna arrays are detailed with examples and discussions. By Andrea Massa, Member IEEE, Giacomo Oliveri, Member IEEE, Federico Viani, Member IEEE,andPaoloRocca,Member IEEE ABSTRACT | The concept of long-range wireless power trans- the state of the art for long-range wireless power transmis- mission (WPT) has been formulated shortly after the invention sion, highlighting the latest advances and innovative solutions of high power microwave amplifiers. The promise of WPT, as well as envisaging possible future trends of the research in energy transfer over large distances without the need to deploy this area. a wired electrical network, led to the development of landmark successful experiments, and provided the incentive for further KEYWORDS | Array antennas; solar power satellites; wireless research to increase the performances, efficiency, and robust- power transmission (WPT) ness of these technological solutions. In this framework, the key-role and challenges in designing transmitting and receiving antenna arrays able to guarantee high-efficiency power trans- I. INTRODUCTION fer and cost-effective deployment for the WPT system has been Long-range wireless power transmission (WPT) systems soon acknowledged. Nevertheless, owing to its intrinsic com- working in the radio-frequency (RF) range [1]–[5] are plexity, the design of WPT arrays is still an open research field currently gathering a considerable interest (Fig. -
Cetiie B Tia Nature Red Acted
Probabilistic Methods for Systems Engineering with Application to Nanosatellite Laser Communications by Emily B. Clements Submitted to the Department of Aeronautics and Astronautics in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY June 2018 Massachusetts Institute of Technology 2018. All rights reserved. Autholr Signature redacted (J Department of Aeronautics and Astronautics May 24,2018 Cetiie b tianature red acted Kerri L. Cahoy Associate Professor of Aeronautics and Astronautics red acted Thesis Supervisor Certified by ... Signatu re ........................ David 0. Caplan Senior Staff, MIT Lincoln Laboratory Certified by, S ignature redacted Jeffrey A. Mendenhall Lincoln Laboratory C ignature red acted Senior Staff, MIT Certified by. ................................... David W. Miller Jerome Hunsaker Professor of Aeronauticq and Astronautics Accepted by......... .................. Signature redacted MASSACHUSETTS INSTITUTE Hamsa Balakrishnan OF TECHNOLOGY Associate Professor of Aeronautics and Astronautics JUN 28 2018 Chair, Graduate Program Committee LIBRARIES ARCHIVES 2 Probabilistic Methods for Systems Engineering with Application to Nanosatellite Laser Communications by Emily B. Clements Submitted to the Department of Aeronautics and Astronautics on May 24, 2018, in partial fulfillment of the requirements for the degree of Doctor of Philosophy Abstract Risk-tolerant platforms such as nanosatellites may be able to accept moderate perfor- mance uncertainty -
High Gain Isotropic Rectenna Erika Vandelle, Phi Long Doan, Do Hanh Ngan Bui, T.-P
High gain isotropic rectenna Erika Vandelle, Phi Long Doan, Do Hanh Ngan Bui, T.-P. Vuong, Gustavo Ardila, Ke Wu, Simon Hemour To cite this version: Erika Vandelle, Phi Long Doan, Do Hanh Ngan Bui, T.-P. Vuong, Gustavo Ardila, et al.. High gain isotropic rectenna. 2017 IEEE Wireless Power Transfer Conference (WPTC), May 2017, Taipei, Taiwan. pp.54-57, 10.1109/WPT.2017.7953880. hal-01722690 HAL Id: hal-01722690 https://hal.archives-ouvertes.fr/hal-01722690 Submitted on 29 Aug 2018 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. High Gain Isotropic Rectenna E. Vandelle1, P. L. Doan1, D.H.N. Bui1, T.P. Vuong1, G. Ardila1, K. Wu2, S. Hemour3 1 Université Grenoble Alpes, CNRS, Grenoble INP*, IMEP–LAHC, Grenoble, France 2 Polytechnique Montréal, Poly-Grames, Montreal, Quebec, Canada 3 Université de Bordeaux, IMS Bordeaux, Bordeaux Aquitaine INP, Bordeaux, France *Institute of Engineering University of Grenoble Alpes {vandeler, buido, vuongt, ardilarg}@minatec.inpg.fr [email protected] [email protected] [email protected] Abstract— This paper introduces an original strategy to step up the capacity of ambient RF energy harvesters. -
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. -
Monitoring Times 2000 INDEX
Monitoring Times 1994 INDEX FEATURES: Air Show: Triumph to Tragedy Season Aug JUNE Duopolies and DXing Broadcast: Atlantic City Aero Monitoring May JULY TROPO Brings in TV & FM A Journey to Morocco May Dayton's Aviation Extravaganza DX Bolivia: Radio Under the Gun June June AUG Low Power TV Stations Broadcasting Battlefield, Colombia Flight Test Communications Jan SEP WOW, Omaha Dec Gathering Comm Intelligence OCT Winterizing Chile: Land of Crazy Geography June NOV Notch filters for good DX April Military Low Band Sep DEC Shopping for DX Receiver Deutsche Welle Aug Monitoring Space Shuttle Comms European DX Council Meeting Mar ANTENNA TOPICS Aug Monitoring the Prez July JAN The Earth’s Effects on First Year Radio Listener May Radio Shows its True Colors Aug Antenna Performance Flavoradio - good emergency radio Nov Scanning the Big Railroads April FEB The Half-Rhombic FM SubCarriers Sep Scanning Garden State Pkwy,NJ MAR Radio Noise—Debunking KNLS Celebrates 10 Years Dec Feb AntennaResonance and Making No Satellite or Cable Needed July Scanner Strategies Feb the Real McCoy Radio Canada International April Scanner Tips & Techniques Dec APRIL More Effects of the Earth on Radio Democracy Sep Spy Catchers: The FBI Jan Antenna Radio France Int'l/ALLISS Ant Topgun - Navy's Fighter School Performance Nov Mar MAY The T2FD Antenna Radio Gambia May Tuning In to a US Customs Chase JUNE Antenna Baluns Radio Nacional do Brasil Feb Nov JULY The VHF/UHF Beam Radio UNTAC - Cambodia Oct Video Scanning Aug Traveler's Beam Restructuring the VOA Sep Waiting -
Arrays: the Two-Element Array
LECTURE 13: LINEAR ARRAY THEORY - PART I (Linear arrays: the two-element array. N-element array with uniform amplitude and spacing. Broad-side array. End-fire array. Phased array.) 1. Introduction Usually the radiation patterns of single-element antennas are relatively wide, i.e., they have relatively low directivity. In long distance communications, antennas with high directivity are often required. Such antennas are possible to construct by enlarging the dimensions of the radiating aperture (size much larger than ). This approach, however, may lead to the appearance of multiple side lobes. Besides, the antenna is usually large and difficult to fabricate. Another way to increase the electrical size of an antenna is to construct it as an assembly of radiating elements in a proper electrical and geometrical configuration – antenna array. Usually, the array elements are identical. This is not necessary but it is practical and simpler for design and fabrication. The individual elements may be of any type (wire dipoles, loops, apertures, etc.) The total field of an array is a vector superposition of the fields radiated by the individual elements. To provide very directive pattern, it is necessary that the partial fields (generated by the individual elements) interfere constructively in the desired direction and interfere destructively in the remaining space. There are six factors that impact the overall antenna pattern: a) the shape of the array (linear, circular, spherical, rectangular, etc.), b) the size of the array, c) the relative placement of the elements, d) the excitation amplitude of the individual elements, e) the excitation phase of each element, f) the individual pattern of each element. -
High Frequency (HF)
Calhoun: The NPS Institutional Archive Theses and Dissertations Thesis Collection 1990-06 High Frequency (HF) radio signal amplitude characteristics, HF receiver site performance criteria, and expanding the dynamic range of HF digital new energy receivers by strong signal elimination Lott, Gus K., Jr. Monterey, California: Naval Postgraduate School http://hdl.handle.net/10945/34806 NPS62-90-006 NAVAL POSTGRADUATE SCHOOL Monterey, ,California DISSERTATION HIGH FREQUENCY (HF) RADIO SIGNAL AMPLITUDE CHARACTERISTICS, HF RECEIVER SITE PERFORMANCE CRITERIA, and EXPANDING THE DYNAMIC RANGE OF HF DIGITAL NEW ENERGY RECEIVERS BY STRONG SIGNAL ELIMINATION by Gus K. lott, Jr. June 1990 Dissertation Supervisor: Stephen Jauregui !)1!tmlmtmOlt tlMm!rJ to tJ.s. eave"ilIE'il Jlcg6iielw olil, 10 piolecl ailicallecl",olog't dU'ie 18S8. Btl,s, refttteste fer litis dOCdiii6i,1 i'lust be ,ele"ed to Sapeihil6iiddiil, 80de «Me, "aial Postg;aduulG Sclleel, MOli'CIG" S,e, 98918 &988 SF 8o'iUiid'ids" PM::; 'zt6lI44,Spawd"d t4aoal \\'&u 'al a a,Sloi,1S eai"i,al'~. 'Nsslal.;gtePl. Be 29S&B &198 .isthe 9aleMBe leclu,sicaf ,.,FO'iciaKe" 6alite., ea,.idiO'. Statio", AlexB •• d.is, VA. !!!eN 8'4!. ,;M.41148 'fl'is dUcO,.Mill W'ilai.,s aliilical data wlrose expo,l is idst,icted by tli6 Arlil! Eurse" SSPItial "at FRIis ee, 1:I.9.e. gec. ii'S1 sl. seq.) 01 tlls Exr;01l ftle!lIi"isllatioli Act 0' 19i'9, as 1tI'I'I0"e!ee!, "Filill ell, W.S.€'I ,0,,,,, 1i!4Q1, III: IIlIiI. 'o'iolatioils of ltrese expo,lla;;s ale subject to 960616 an.iudl pSiiaities. -
Design and Analysis of Microstrip Patch Antenna Arrays
Design and Analysis of Microstrip Patch Antenna Arrays Ahmed Fatthi Alsager This thesis comprises 30 ECTS credits and is a compulsory part in the Master of Science with a Major in Electrical Engineering– Communication and Signal processing. Thesis No. 1/2011 Design and Analysis of Microstrip Patch Antenna Arrays Ahmed Fatthi Alsager, [email protected] Master thesis Subject Category: Electrical Engineering– Communication and Signal processing University College of Borås School of Engineering SE‐501 90 BORÅS Telephone +46 033 435 4640 Examiner: Samir Al‐mulla, Samir.al‐[email protected] Supervisor: Samir Al‐mulla Supervisor, address: University College of Borås SE‐501 90 BORÅS Date: 2011 January Keywords: Antenna, Microstrip Antenna, Array 2 To My Parents 3 ACKNOWLEGEMENTS I would like to express my sincere gratitude to the School of Engineering in the University of Borås for the effective contribution in carrying out this thesis. My deepest appreciation is due to my teacher and supervisor Dr. Samir Al-Mulla. I would like also to thank Mr. Tomas Södergren for the assistance and support he offered to me. I would like to mention the significant help I have got from: Holders Technology Cogra Pro AB Technical Research Institute of Sweden SP I am very grateful to them for supplying the materials, manufacturing the antennas, and testing them. My heartiest thanks and deepest appreciation is due to my parents, my wife, and my brothers and sisters for standing beside me, encouraging and supporting me all the time I have been working on this thesis. Thanks to all those who assisted me in all terms and helped me to bring out this work. -
Design of a Novel Flat Array Antenna for Radio Communications
MEE10:121 Design of a Novel Flat Array Antenna for Radio Communications Tahir Mehmood Yu Yun This thesis is presented as part of degree of Master of Science in Electrical Engineering Blekinge Institute of Technology Blekinge Institute of Technology School of Electrical Engineering Radio Communication Group. External Supervisor: Jun Cao, Blekinge Antenna Technology Sweden AB. Internal Supervisor: Prof. Dr. Hans-Jürgen Zepernick Examiner: Prof. Dr. Hans-Jürgen Zepernick ABSTRACT In mobile microwave communication, reflector antennas have widely been used for very long time. Flat array antennas which have very rigid structure are being used in satellite communication, radar and airborne applications. These antennas are relatively smart in size and have more rigid structure than reflector antennas. The 32×32 elements vertical polarized slotted waveguide flat array antenna is presented in this thesis, The sub-array and feed waveguide network are set up and simulated by 3D-Electromagnetic Software HFSS. This array can have over 4.3% reflection and radiation bandwidth, low side lobe and back lobe. So it has potential application value in radio communication. 0 ACKNOWLEDGMENTS All praises to ALLAH, the cherisher and the sustainer of the universe, the most gracious and the most merciful, who bestowed us with health and abilities to complete this project successfully. This project means to us far more than a Master degree requirement as our knowledge was significantly enhanced during the course of its research and implementation. We are especially thankful to the Faculty and Staff of School of Engineering at the Blekinge Institute of Technology (BTH) Karlskrona, Sweden, who have always been a source of motivation for us and supported us tremendously during this research. -
Review of Recent Phased Arrays for Millimeter-Wave Wireless Communication
sensors Review Review of Recent Phased Arrays for Millimeter-Wave Wireless Communication Aqeel Hussain Naqvi and Sungjoon Lim * School of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 221, Heukseok-Dong, Dongjak-Gu, Seoul 156-756, Korea; [email protected] * Correspondence: [email protected]; Tel.: +82-2-820-5827; Fax: +82-2-812-7431 Received: 27 July 2018; Accepted: 18 September 2018; Published: 21 September 2018 Abstract: Owing to the rapid growth in wireless data traffic, millimeter-wave (mm-wave) communications have shown tremendous promise and are considered an attractive technique in fifth-generation (5G) wireless communication systems. However, to design robust communication systems, it is important to understand the channel dynamics with respect to space and time at these frequencies. Millimeter-wave signals are highly susceptible to blocking, and they have communication limitations owing to their poor signal attenuation compared with microwave signals. Therefore, by employing highly directional antennas, co-channel interference to or from other systems can be alleviated using line-of-sight (LOS) propagation. Because of the ability to shape, switch, or scan the propagating beam, phased arrays play an important role in advanced wireless communication systems. Beam-switching, beam-scanning, and multibeam arrays can be realized at mm-wave frequencies using analog or digital system architectures. This review article presents state-of-the-art phased arrays for mm-wave mobile terminals (MSs) and base stations (BSs), with an emphasis on beamforming arrays. We also discuss challenges and strategies used to address unfavorable path loss and blockage issues related to mm-wave applications, which sets future directions. -
An Update on the CCSDS Optical Communications Working Group Interoperability Standards
An Update on the CCSDS Optical Communications Working Group Interoperability Standards Bernard L. Edwards Robert Daddato NASA Goddard Space Flight Center European Space Agency Greenbelt, MD 20771 USA Darmstadt, Germany Klaus-Juergen Schulz Randall Alliss European Space Agency Northrop Grumman Corporation Darmstadt, Germany McLean, VA 22102 USA Jon Hamkins Dirk Giggenbach NASA Jet Propulsion Laboratory DLR Pasadena, CA 91109 USA Oberpfaffenhofen, Germany Bryan Robinson Lena Braatz MIT Lincoln Laboratory Booz Allen Hamilton, Inc. Lexington, MA 02420 USA McLean, VA 22102 USA Abstract – International space agencies around the one space agency’s spacecraft could be served by world are working together in the Interagency another space agency’s ground antennas. Operation Advisory Group (IOAG) and the Consultative Committee for Space Data Systems The overall development of international space (CCSDS) to develop interoperability standards for optical communications. The standards support communication standards for cross support is optical communication systems for both Near Earth coordinated by the Interagency Operations and Deep Space robotic and human-rated spacecraft. Advisory Group (IOAG) [1]. The IOAG is an The standards generally address both free space links organization made up of international space between spacecraft and free space links between agencies that provides a forum for identifying spacecraft and ground. This paper will overview the common needs and coordinating space history and structure of the CCSDS Optical communications policy, high-level procedures, Communications Working Group and provide an technical interfaces, and other matters related to update on the set of optical communications interoperability and space communications. The standards being developed. The paper will address the ongoing work on High Photon Efficiency IOAG considers the future requirements and trends communications, High Data Rate communications, in spacecraft communications needs and assigns and Optical On/Off Keying communications. -
Wire Antennas for Ham Radio
Wire Antennas for Ham Radio Iulian Rosu YO3DAC / VA3IUL http://www.qsl.net/va3iul 01 - Tee Antenna 02 - Half-Lamda Tee Antenna 03 - Twin-Led Marconi Antenna 04 - Swallow-Tail Antenna 05 - Random Length Radiator Wire Antenna 06 - Windom Antenna 07 - Windom Antenna - Feed with coax cable 08 - Quarter Wavelength Vertical Antenna 09 - Folded Marconi Tee Antenna 10 - Zeppelin Antenna 11 - EWE Antenna 12 - Dipole Antenna - Balun 13 - Multiband Dipole Antenna 14 - Inverted-Vee Antenna 15 - Sloping Dipole Antenna 16 - Vertical Dipole 17 - Delta Fed Dipole Antenna 18 - Bow-Tie Dipole Antenna 19 - Bow-Tie Folded Dipole Antenna for RX 20 - Multiband Tuned Doublet Antenna 21 - G5RV Antenna 22 - Wideband Dipole Antenna 23 - Wideband Dipole for Receiving 24 - Tilted Folded Dipole Antenna 25 - Right Angle Marconi Antenna 26 - Linearly Loaded Tee Antenna 27 - Reduced Size Dipole Antenna 28 - Doublet Dipole Antenna 29 - Delta Loop Antenna 30 - Half Delta Loop Antenna 31 - Collinear Franklin Antenna 32 - Four Element Broadside Antenna 33 - The Lazy-H Array Antenna 34 - Sterba Curtain Array Antenna 35 - T-L DX Antenna 36 - 1.9 MHz Full-wave Loop Antenna 37 - Multi-Band Portable Antenna 38 - Off-center-fed Full-wave Doublet Antenna 39 - Terminated Sloper Antenna 40 - Double Extended Zepp Antenna 41 - TCFTFD Dipole Antenna 42 - Vee-Sloper Antenna 43 - Rhombic Inverted-Vee Antenna 44 - Counterpoise Longwire 45 - Bisquare Loop Antenna 46 - Piggyback Antenna for 10m 47 - Vertical Sleeve Antenna for 10m 48 - Double Windom Antenna 49 - Double Windom for 9 Bands