Concept Definition Study, Exhibit C
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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. -
Enhancing the Coverage Area of a WI-FI Access Point Using Cantenna
ISSN 2394-3777 (Print) ISSN 2394-3785 (Online) Available online at www.ijartet.com International Journal of Advanced Research Trends in Engineering and Technology (IJARTET) Vol. 2, Issue 4, April 2015 Enhancing the Coverage Area of a WI-FI Access Point Using Cantenna B.Anandhaprabakaran#1, S.Shanmugam*2,J.Sridhar*3S.Ajaykumar#4 #2-4student #1Assistant Professor, Sri Ramakrishna Engineering College, Coimbatore, Tamilnadu, India Abstract: “The next decade will be the Wireless Era.” – Intel Executive Sean Maloney and other executives framed. Today’s network especially LAN has drastically changed. People expect that they should not be bound to the network. In this scenario, Wireless (WLAN) offers tangible benefits over traditional wired networking. Wi-Fi (Wireless Fidelity) is a generic term that refers to the IEEE 802.11 communications standard for Wireless Local Area Networks (WLANs). Wi-Fi works on three modes namely Ad hoc, Infrastructure and Extended modes. Ad hoc network is P2P mode. Ad hoc does not use any intermediary device such as Access Point. Infra Structure and Extended modes use Access Point as interface between wireless clients. The wireless network is formed by connecting all the wireless clients to the AP. Single access point can support up to 30 users and can function within a range of 100 – 150 feet indoors and up to 300 feet outdoors. The coverage area depends upon the location where the AP is being placed. The AP has the traditional Omni directional antenna The aim of this project is to increase the coverage area of an AP by replacing the traditional Omni directional antenna with Bi-quad antenna with parabolic reflector. -
Rectenna Design of GSM Frequency Band 900 Mhz for Electromagnetic Energy Harvesting
Journal of Communications Vol. 14, No. 4, April 2019 Rectenna Design of GSM Frequency Band 900 MHz for Electromagnetic Energy Harvesting Aisah1, Rudy Yuwono2, and Fabian Adna Suryanto2 1Department of Electrical Engineering Polinema, Jl Sukarno Hatta 9, Malang 2 Department of Electrical Engineering, University of Brawijaya, Jl MT Haryono 167, Malang, Indonesia Email: {aisahzahra, fabianadna}@gmail.com; [email protected] Abstract—Rectenna can be used as electromagnetic energy voltage source (DC). The used rectifier is a full wave harvesting. The principle of this electromagnetic energy rectifier with four diodes. harvesting can be applied at 900 MHz GSM frequency band. To create a rectenna that can work on 900 MHz frequency band, it C. Antenna is necessary to design a rectifier circuit that can work at that Antenna is defined by Webster’s dictionary as "a frequency band and to use a 900 MHz GSM antenna. metallic device for radiating or receiving radio waves". Index Terms—Rectenna, energy harvesting, GSM Meanwhile, according to IEEE, the antenna is defined as "a means for radiating or receiving radio waves". In this paper, antenna is defined as a device that processes the transfer of signals into electromagnetic I. INTRODUCTION waves through free space and can be received by other Electromagnetic waves is not fully utilized by GSM antennas and vice versa. Transmission line of antenna Mobile Station devices so there is widespread dispersion can be either a coaxial or waveguide that is used to of electromagnetic waves. These excess electromagnetic transport electromagnetic energy from a transmitting waves can be used as energy sources. -
MFJ 2004 Ham Buyers Guide
QSTCatP01.qxd 10/16/2003 10:03 AM Page 1 MFJ 2004 Ham Buyers Guide See inside for these New MFJ Products! 300W Automatic Tuner Tiny Travel Tuner DC Multi-Outlet Strips Ultra-fast, 2000 memories, antenna Fits in the palm of your hand! 150 has both 5-way binding posts switch, 4:1 balun, Cross-Needle and Watts, 80-10 Meters, Bypass Switch and Digital SWR/Wattmeter, 1.8-30 MHz Anderson PowerPole® connectors MFJ-902 $7995 $ 95 MFJ-1129 $ 95 109 MFJ-993 259 Four New models -- balun, Four new high current 150, 300, 600 Watt models. SWR/Wattmeter . DC multi-outlet strips . See Back Cover See Page 6 See Page 16 Balanced Line Dummy Load Manual Mic/Radio Switch Antenna Tuner SWR/Wattmeter Screwdriver Switch any 2 mics 1.5kW, to any 2 rigs Superb Antenna peak reading Covers 40-2 Meters balance, switchable 1.8-54 MHz, to external MFJ-1662 $ 95 $ 95 300 Watts antenna 129 MFJ-1263 99 $ 95 $ 95 MFJ-974H 189 MFJ-267 149 Four new models . Three new models . See Page 7 See Page 9 See Page 42 See Page 21 10 foot Antenna 160-6 Meter 1.5 kW 4:1 Glazed 4 Foot Telescopic Tripod Doublet current balun ceramic Ground Whip 40-inch Antenna /insulator insulator Rod MFJ-1954 between legs Copper bonded steel MFJ- $ 95 MFJ-1918 MFJ-919 MFJ-16C01 MFJ-1934 19 1777 $ 95 $ 95 $ 95 59 $ 95 3 lengths . 39 49 69c 4 See Page 42 See Page 42 See Page 43 See Page 43 See Page 43 See Page 7 Mobile Discone Atomic Atomic Wireless Speaker/Mic Antennas Antenna 24/12 Clock 24/12 Watch Weather for Yaesu VX-7R MFJ-1456, $14995 25-1300 Station MHz 40/20/15/10/6/2M MFJ- MFJ- MFJ-295R $ 95 $ 95 MFJ-1868 132RC 186RC MFJ-192 MFJ-1438, 99 $ 95 19 10/6/2M/440 MHz $5995 $1495 $2995 59 See Page 41, 39 See Page 40 See Page 29 See Page 30 See Page 30 See Page 35 Ameritron Ameritron Ameritron Hy-Gain Screwdriver Digital Screwdriver flat Mobile 80-10 M Vertical Antenna Antenna Controller SWR/Wattmeter The Classic is Back! 5 1.2 kW, Pittman Super bright high- Just 1 /8” thick, AV-18AVQII Commercial Gear Motor intensity LEDs flat mounts on $ 95 dashboard 229 SDA-100 SDC-100 MK-80, $79.95. -
Design of a Fractal Slot Antenna for Rectenna System and Comparison of Simulated Parameters for Different Dimensions
CPUH-Research Journal: 2015, 1(2), 43-48 ISSN (Online): 2455-6076 http://www.cpuh.in/academics/academic_journals.php Design of a Fractal Slot Antenna for Rectenna System and Comparison of Simulated Parameters for Different Dimensions Nitika Sharma 1*, B. S. Dhaliwal2 and Simranjit Kaur3 1, 2 & 3Department of Electronics and Communication Engineering, G. N. D. E. College, Ludhiana, India * Correspondance E-mail: [email protected] ABSTRACT: In the modern era we required a compact system having a high gain, efficiency and broad band- width. For rectenna (antenna + rectifier) system we need such an antenna which can receive more radio frequen- cies from the surroundings and gives to rectifier which works on one or more frequency band or multiband oper- ation. For fulfill these requirements we proposed a fractal slot antenna which gives multiband operation on 2.45 GHz. In this paper, we compare the simulation parameters on the basis of dimensions. Keywords: Rectenna; Multiband; Efficiency; Fractal Slot antenna and Gain. INTRODUCTION: Modern wireless applications antennas used as rectennas, microstrip patch antennas have challenged antenna designers with demands for are gaining popularity due to their low profile, light low-cost and compact antennas along with a simple weight, low production cost, simplicity, and low cost radiating element, signal-feeding configuration, good to manufacture using modern printed-circuit technol- performance, and easy fabrication. In the modern era, ogy [4]. the large reduction in power consumption achieved in Another reason for the wide use of patch antennas is electronics, along with the numbers of mobiles and their versatility in terms of resonant frequency, polari- other autonomous devices is continuously increasing zation, and impedance when a particular patch shape the attractiveness of low-power energy-harvesting [5] and mode are chosen . -
Millimeter-Wave Wireless Power Transfer Technology for Space
Millimeter-Wave Wireless Power Transfer Technology for Space Applications Goutam Chattopadhyay, Harish Manohara, Mohammad Mojarradi, Tuan Vo, Hadi Mojarradi, Sam Bae, Neville Marzwell California Institute of Technology, USA Introduction Technologies enabling the development of compact systems for wireless transfer of power through radio frequency waves (RF) continue to be important for future space based systems. For example, for lunar surface operation, wireless power transfer technology enables rapid on-demand transmission of power to loads (robotic systems, habitats, and others) and eliminates the need for establishing a traditional power grid. A typical wireless power receiver consists of an array of rectenna elements. Each rectenna element consists of an antenna together with a high speed diode and a storage capacitor configured in a highly tuned narrowband circuit for this purpose. The conversion of the microwave energy into DC in this fashion is almost instantaneous. Using a high power rectenna array in concert with a fast charging high performance battery can enable charging of the battery at very short time with a large power burst and discharge of it at a lower rate for an extended operation time for remote electronic assets. Two main factors that determine the physical size of a rectenna based microwave power conversion system are the frequency of the RF transmission and power capacity. At higher frequencies, the size of the antenna elements in the array is small resulting in a smaller form factor for the system. The smaller form factor of the higher frequency wireless power receiver makes them more attractive for space systems; however, higher frequency systems have to deal with (i) availability of high frequency power conversion components, (ii) higher atmospheric loss, and (iii) overall efficiency in antenna arrays and the power conversion network. -
Planning, Designing and Building Large Scale Wi-Fi Network at Campus
International Journal of Advanced Research in Electronics and Communication Engineering (IJARECE) Volume 4, Issue 3, March 2015 Planning, Designing and Building Large Scale Wi-Fi Network at Campus Mrs P. Sasirekha M.E., Ms P. Divya, Ms K. Meera, Ms M. Sathya Department of Electronics and Communication Engineering S.A.Engineering College, Chennai, India. Abstract - With the increase in use of internet access, Wi- important phenomenon, there is need to set up a Fi becomes one of the most important gadgets to employ repeater, which produces high performance. Repeater it. In the world of communication and networking, is a device that receives a digital signal on an wireless technology plays a vital role and is one of the electromagnetic or optical transmission medium and main areas in the research. These wireless technologies regenerates the signal along the next medium. In are based on Wireless Local Area Networks (WLAN) standards which would provide offering benefits over remote areas or in some places there may found many traditional wired LAN networking. Wi-Fi is a generic obstacles, where the signal strength is poor or term of IEEE 802.11n for wireless Local Area Networks unreachable. In some cases repeater is used to boost (WLANs). Even though, it provide benefits over Local the signal strength or in other words, they repeat the, Area Networks the Wi-Fi users are not completely so the preferred computer gets greater coverage area. satisfied with signal strength provided by the Wi-Fi cards, Wireless signals are prone to loss of data frequently. routers (or) access points. In addition to Wi-Fi cards, The reception of signal strength depends upon the there are several types of Wi-Fi antennas which give topography of the place, where we stay will be a declining signal strength. -
Design of a Five-Band Dual-Port Rectenna for RF Energy Harvesting
Computers, Materials & Continua Tech Science Press DOI:10.32604/cmc.2021.018292 Article Design of a Five-Band Dual-Port Rectenna for RF Energy Harvesting Surajo Muhammad1,*, Jun Jiat Tiang1, Sew Kin Wong1, Jamel Nebhen2 and Amjad Iqbal1 1Centre for Wireless Technology, Faculty of Engineering, Multimedia University, Cyberjaya, 63100, Malaysia 2College of Computer Science and Engineering, Prince Sattam Bin Abdulaziz University, Alkharj, 11942, Saudi Arabia *Corresponding Author: Surajo Muhammad. Email: [email protected] Received: 02 March 2021; Accepted: 04 April 2021 Abstract: This paper proposed the design of a dual-port rectifier with multi- frequency operations. The RF rectifier is achieved using a combination of L-section inductive impedance matching network (IMN) at Port-1 with a multiple stubs impedance transformer at Port-2. The fabricated prototype can harvest RF signal from GSM/900, GSM/1800, UMTS/2100, Wi-Fi/2.45 and LTE/2600 frequency bands at (0.94, 1.80, 2.10, 2.46, and 2.63 GHz), respectively. The rectifier occupies a small portion of a PCB board at 0.20 λg × 0.15 λg. The proposed circuit realized a measured peak RF-to-dc (radio frequency direct current) power conversion efficiency (PCE) of (21%, 22.76%, 25.33%, 21.57%, and 22.14%) for an input power of −20 dBm. The RF harvester attains a measured peak RF-to-dc PCE of 72.70% and an output dc voltage of 154 mV for an input power of 3 dBm at 2.46 GHz. Measurement of the proposed rectifier in the ambiance gives a peak dc output voltage of 376.1 mV from the five signal tones. -
Amplifiers, Sequencing, Phasing Lines, Noise Problems Tom Haddon, K5VH and New Modes of Operation
PROCEEDINGS of the 48th Conference of the July 24-27 Austin, Texas 2014 Published by: ® i Copyright © 2014 by The American Radio Relay League Copyright secured under the Pan-American Convention. International Copyright secured. All rights reserved. No part of this work may be reproduced in any form except by written permission of the publisher. All rights of translation reserved. Printed in USA. Quedan reservados todos los derechos. First Edition ii CENTRAL STATES VHF SOCIETY 48th Annual Conference, July 24 - 27, 2014 Austin, Texas http://www.csvhfs.org President: Steve Hicks, N5AC Fellow members and guests of the Central States VHF Society, Vice President: Dick Hanson, K5AND In 2004, a friend invited me to attend an amateur radio conference Website: much like this one, and that conference forever changed the way I Bob Hillard, WA6UFQ looked at amateur radio. I was really amazed at the number of people and the amount of technology that had come together in Antenna Range: Kent Britain, WA5VJB one place! Before the end of the conference, I had approached Marc Thorson, WB0TEM one of the vendors and boldly said that I wanted to get on 222- Rover/Dish Displays: 2304. Jim Froemke, K0MHC Facilities: As others have pointed out in the past, one of the real values of Lori Hicks attendance is getting to know other died-in-the-wool VHF’ers. Yes, Family Program: the Proceedings is a great resource tool, but it is hard to overstate Lori Hicks the value of the one on one time with the real pros at one of these Technical Program: conferences. -
Rectifying Antennas for Energy Harvesting from the Microwaves to Visible Light: a Review C.A
Rectifying antennas for energy harvesting from the microwaves to visible light: A review C.A. Reynaud, David Duché, Jean-Jacques Simon, Estéban Sanchez-Adaime, O. Margeat, Jörg Ackermann, Vikas Jangid, Chrystelle Lebouin, Damien Brunel, Frederic Dumur, et al. To cite this version: C.A. Reynaud, David Duché, Jean-Jacques Simon, Estéban Sanchez-Adaime, O. Margeat, et al.. Rectifying antennas for energy harvesting from the microwaves to visible light: A review. Progress in Quantum Electronics, Elsevier, 2020, 72, pp.100265. 10.1016/j.pquantelec.2020.100265. hal- 02895836 HAL Id: hal-02895836 https://hal.archives-ouvertes.fr/hal-02895836 Submitted on 10 Jul 2020 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. Rectifying antennas for energy harvesting from the microwaves to visible light: a review C.A. Reynauda,∗, D. Duchéa, J-J. Simona, E. Sanchez-Adaimea, O. Margeatb, J. Ackermanb, V. Jangidc, C. Lebouinc, D. Bruneld, F. Dumurd, G. Bergince, C.A. Nijhuisf, L. Escoubasa aAix Marseille Univ, Univ Toulon, CNRS, IM2NP UMR 7334, Marseille, France bAix-Marseille -
T.C. Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü
T.C. SÜLEYMAN DEMİREL ÜNİVERSİTESİ FEN BİLİMLERİ ENSTİTÜSÜ KABLOSUZ HABERLEŞME UYGULAMALARI İÇİN FREKANSI YENİDEN DÜZENLENEBİLİR MİKROŞERİT ANTEN TASARIMI İman Hafedh Yaseen Al HASNAWİ Danışman Doç. Dr. Mesud KAHRİMAN YÜKSEK LİSANS TEZİ ELEKTRONİK VE HABERLEŞME MÜHENDİSLİĞİ ANABİLİM DALI ISPARTA - 2018 © 2018 [İman Hafedh Yaseen Al HASNAWİ] İÇİNDEKİLER İÇİNDEKİLER ..................................................................................................................................... i ÖZET .................................................................................................................................................. iii ABSTRACT ........................................................................................................................................ iv TEŞEKKÜR ......................................................................................................................................... v ŞEKİLLER DİZİNİ ........................................................................................................................... vi ÇİZELGELER DİZİNİ ................................................................................................................... viii SİMGELER VE KISALTMALAR DİZİNİ .................................................................................... ix 1. GİRİŞ................................................................................................................................................ 1 1.1. Yeniden Yapılandırılabilir Anten Sınıflandırması -
Building the Largest Cantenna in Kansas: an Interdisciplinary Collaboration Between Engineering Technology Programs
AC 2008-820: BUILDING THE LARGEST CANTENNA IN KANSAS: AN INTERDISCIPLINARY COLLABORATION BETWEEN ENGINEERING TECHNOLOGY PROGRAMS Saeed Khan, Kansas State University-Salina SAEED KHAN is an Associate Professor with the Electronic and Computer Engineering Technology program at Kansas State University at Salina. Dr. Khan received his Ph.D. and M.S. degrees in Electrical Engineering from the University of Connecticut, in 1989 and 1994 respectively and his B.S. in Electrical Engineering from Bangladesh University of Engineering and Technology, Dhaka, Bangladesh in 1984. Khan, who joined KSU in 1998, teaches courses in telecommunications and digital systems. His research interests and areas of expertise include antennas and propagation, novel materials for microwave application, and electromagnetic scattering. Greory Spaulding, Kansas State University-Salina GREG SPAULDING in an Professor of mechanical engineering technology joined Kansas State University at Salina in 1996. Spaulding, a licensed professional engineer, also is the faculty adviser for the Mini Baja club, which simulates a real-world engineering design project. He received his bachelor's and master's degrees in mechanical engineering from Kansas State University. Spaulding holds a patent for a belt drive tensioning system and for an automatic dispensing system for prescriptions. Page 13.270.1 Page © American Society for Engineering Education, 2008 “Building the Largest Cantenna in Kansas: An Interdisciplinary Collaboration between Engineering Technology Programs” Abstract: This paper describes the design and development of a large 20 dBi (decibels isotropic) Wi-Fi antenna for a class project in the Communication Circuit Design course. This large antenna is based on smaller Wi-Fi antennas commonly referred to as cantennas (gain of about 10 dBi).