AWS Microwave Antenna System Relocation Kit
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Fig. 1 System Block Diagram
SSC13-II-2 300 Mbps Downlink Communications from 50kg Class Small Satellites Hirobumi Saito Japan Aerospace Exploration Agency (JAXA), Institute of Space and Astronautical Science (ISAS) Naohiko Iwakiri , Atsushi Tomiki, Takahide Mizuno, Hiromi Watanabe, Tomoya Fukami, Osamu Shigeta, Hitoshi Nunomura, Yasuaki Kanda , Kaname Kojima, Takahiro Shinke, and Toshiki Kumazawa Contents 1. Purpose : 320Mbps down link for small sat 2. Onboard segment: high effiency transmitter. small antenna 3. Ground segment : 3.8m S/X band antenna powerful receiver 4. Total simulation : SPW software + link calculation 5. EM test finished. FM maunfacturing now. 6. On-orbit demonstration : 2014 with 50kg sat. Limits of Small Satellites for Earth Observations • Mass Limit(<100kg), Power Limit (<100W) ー Telescope Resolution (5m vs. 0.5m) ー Down link Speed (10Mbps vs. 800Mbps) ・ What is the Bottleneck of Down Link Speed ? - Power ! Down link bit rate VS. satellite mass for low earth orbit. 1.0E+12 ) 1T bps TerraSAR-X Hodoyoshi #4 ( (2014) WorldView1 1.0E+09 EROS-B Formosat2 GeoEye-1 1G Orbview3Kompsat2 ALOS Orbview4 JERS1 EOS-PM1 Ikonos2 Radarsat1 TopSat QuickBird2 ERSEnvisat1 Lewis Landsat ADEOS Spot RazakSat-1 UK-DMC2 MOS 1B MOS 1A Terra IRS-1A,1B,1C UK-DMC1 EROS-A AS1000 AlSat Orbview2 TRMM 1.0E+06 データ伝送速度 1M EarlyBird MicroLabSat Cute-1.7 PRISM TOMS-EP Cute-I Down Link Bit Rate(bps) Link Down Bit 観測衛星の 1.0E+031K 1 10 100 1000 10000 Satellite衛星質量 Mass(kg) (kg) High Speed Down Link for Small Sat • Purpose of This Research: High-speed Down Link System with Low Power Consumption ―Goal 50kg Sat @600km orbit DC power <20W, 320Mbps Small Ground Antenna < 4m System block diagram of high-data-rate downlink. -
Development of Earth Station Receiving Antenna and Digital Filter Design Analysis for C-Band VSAT
INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH VOLUME 3, ISSUE 6, JUNE 2014 ISSN 2277-8616 Development of Earth Station Receiving Antenna and Digital Filter Design Analysis for C-Band VSAT Su Mon Aye, Zaw Min Naing, Chaw Myat New, Hla Myo Tun Abstract: This paper describes the performance improvement of C-band VSAT receiving antenna. In this work, the gain and efficiency of C-band VSAT have been evaluated and then the reflector design is developed with the help of ICARA and MATLAB environment. The proposed design meets the good result of antenna gain and efficiency. The typical gain of prime focus parabolic reflector antenna is 30 dB to 40dB. And the efficiency is 60% to 80% with the good antenna design. By comparing with the typical values, the proposed C-band VSAT antenna design is well optimized with gain of 38dB and efficiency of 78%. In this paper, the better design with compromise gain performance of VSAT receiving parabolic antenna using ICARA software tool and the calculation of C-band downlink path loss is also described. The particular prime focus parabolic reflector antenna is applied for this application and gain of antenna, radiation pattern with far field, near field and the optimized antenna efficiency is also developed. The objective of this paper is to design the downlink receiving antenna of VSAT satellite ground segment with excellent gain and overall antenna efficiency. The filter design analysis is base on Kaiser window method and the simulation results are also presented in this paper. Index Terms: prime focus parabolic reflector antenna, satellite, efficiency, gain, path loss, VSAT. -
A Review Paper on Microwave Transmission Using Reflector Antennas
International Journal of Scientific & Engineering Research Volume 8, Issue 10, October-2017 ISSN 2229-5518 251 A Review Paper on Microwave Transmission using Reflector Antennas Sandeep Kumar Singh [1],Sumi Kumari[2] Sr. Lecturer, Dept. of ECE, JBIT, Dehradun [1], Asst. Professor, Dept. of ECE, VGIET, Jaipur[2] [email protected][1] [email protected][2] Abstract: The conventional optimization problem of the beamed microwave energy transmission system is considered. The criterion of maximum efficiency of power intercept is parabolic function of distribution on the transmitting antenna. It is shown that under such a condition of amplitude distribution becomes more uniform than as the unconditional optimization. In this case, we can substantially increase the power radiated by the transmitting antenna losing the power intercept no more than 2%. Keywords: Parabolic Reflector Antenna, Radio Relay, Antenna Gain, Cassegrain Feed. I.INTRODUCTION limited to line of sight propagation; they cannot pass around hills or mountains as lower frequency radio waves can. Microwave radiation is generally defined as that electromagnetic radiation having wavelengths between radio waves and infrared III.ANTENNA radiation. Microwave radiation can be forced to travel in specially designed waveguides. Microwave radiation can be transmitted An antenna (or aerial) is an electrical device which converts through space or through the atmosphere in a microwave beam electric currents into radio waves, and vice versa. It is usually used from a microwave antenna and the microwave energy can be with a radio transmitter or radio receiver. In transmission, a radio collected with a microwave antenna. Microwave antennas are used transmitter applies an oscillating radio frequency electric current to for transmitting and receiving microwave radiation. -
Antenna Selection Guide by Richard Wallace
Application Note AN058 Antenna Selection Guide By Richard Wallace Keywords • Antenna Selection • 433 MHz (387 – 510 MHz) Antenna • Anechoic Chamber • 868 MHz (779 – 960 MHz) Antenna • Antenna Parameters • 915 MHz (779 – 960 MHz) Antenna • 169 MHz (136 – 240 MHz) Antenna • 2.4 GHz Antenna • 315 MHz (273 – 348 MHz) Antenna • CC-Antenna-DK 1 Introduction This application note describes important In addition different antenna types are parameters to consider when deciding presented, with their pros and cons. All of what kind of antenna to use in a short the antenna reference designs available range device application. on www.ti.com/lpw are presented including the Antenna Development Kit Important antenna parameters, different [29]. antenna types, design aspects and techniques for characterizing antennas are The last section in this document contains presented. Radiation pattern, gain, references to additional antenna impedance matching, bandwidth, size and resources such as literature, applicable cost are some of the parameters EM simulation tools and a list of antenna discussed in this document. manufacturer and consultants. Antenna theory and practical Correct choice of antenna will improve measurement are also covered. system performance and reduce the cost. Figure 1. Texas Instruments Antenna Development Kit (CC-Antenna-DK) SWRA161B Page 1 of 44 Application Note AN058 Table of Contents KEYWORDS 1 1 INTRODUCTION 1 2 ABBREVIATIONS 3 3 BRIEF ANTENNA THEORY 4 3.1 DIPOLE (Λ/2) ANTENNAS 4 3.2 MONOPOLE (Λ/4) ANTENNAS 5 3.3 WAVELENGTH CALCULATIONS -
Compact Integrated Antennas Designs and Applications for the Mc1321x, Mc1322x, and Mc1323x
Freescale Semiconductor Document Number: AN2731 Application Note Rev. 2, 12/2012 Compact Integrated Antennas Designs and Applications for the MC1321x, MC1322x, and MC1323x 1 Introduction Contents 1 Introduction . 1 With the introduction of many applications into the 2 Antenna Terms . 2 2.4 GHz band for commercial and consumer use, 3 Basic Antenna Theory . 3 Antenna design has become a stumbling point for many 4 Impedance Matching . 5 customers. Moving energy across a substrate by use of an 5 Antennas . 8 RF signal is very different than moving a low frequency 6 Miniaturization Trade-offs . 11 voltage across the same substrate. Therefore, designers 7 Potential Issues . 12 who lack RF expertise can avoid pitfalls by simply 8 Recommended Antenna Designs . 13 following “good” RF practices when doing a board 9 Design Examples . 14 layout for 802.15.4 applications. The design and layout of antennas is an extension of that practice. This application note will provide some of that basic insight on board layout and antenna design to improve our customers’ first pass success. Antenna design is a function of frequency, application, board area, range, and costs. Whether your application requires the absolute minimum costs or minimization of board area or maximum range, it is important to understand the critical parameters so that the proper trade-offs can be chosen. Some of the parameters necessary in selecting the correct antenna are: antenna © Freescale Semiconductor, Inc., 2005, 2006, 2012. All rights reserved. tuning, matching, gain/loss, and required radiation pattern. This note is not an exhaustive inquiry into antenna design. It is instead, focused toward helping our customers understand enough board layout and antenna basics to aid in selecting the correct antenna type for their application as well as avoiding the typical layout mistakes that cause performance issues that lead to delays. -
Antenna Articles Collection of Short Articles Relating to All Manners of Antennas
Antenna Tips page 1 of 31 Source : http://www.funet.fi/pub/dx/text/antennas/antinfo.txt Antenna Articles Collection of short articles relating to all manners of antennas. These articles are the hard work of Wayne Sarosi KB4YLY (995 Alabama Street, Titusville, FL 32796) SUBJECT: Circular Polarized Antenna There has been a request for a series on 'CP' antennas. The term 'CP' eluded me at first as I was not familar with the abriviated designator for circular polarization. At work, we just use the entire words. I'm going to begin this ten part series with the basics. After researching CP designs with a few engineers and fellow hams, I found that they knew very little about the subject. I also found I didn't know quite as much as I thought I did about circular polarization. So starting at the begining will help all out. First, let's discuss the circular polarized wave. There seems to be conflicting standards used by the world of physics and the IEEE. I found this to be true in four reference manuals including the ARRL Antenna Handbook. At least it's stated right up front but biased according to which text you read. We will follow the IEEE/ARRL standard in the following series for obvious reasons. There are two types of circular polarization; right and left. All of us agree up to this point. According to the ARRL Antenna Handbook, the following statement: 'Polarization Sense is a critical factor, especially in EME work or if the satellite uses a circular polarized antenna. -
Design and Construction of a Cost-Effective Parabolic Satellite Dish Using Available Local Materials
International Journal of Advanced Materials Research Vol. 5, No. 3, 2019, pp. 46-52 http://www.aiscience.org/journal/ijamr ISSN: 2381-6805 (Print); ISSN: 2381-6813 (Online) Design and Construction of a Cost-effective Parabolic Satellite Dish Using Available Local Materials Gbadamosi Ramoni Adewale * Faculty of Science, National Open University of Nigeria, Akure, Nigeria Abstract Communication through satellite is very important at this information age. It can provide complete global coverage. It can be used to send and receive information in remote area where other technology may fail. Communication signals are sent in form of electromagnetic signal which are intercepted by the parabolic dish. The offered high-efficiency and high-gain by the parabolic dish makes it appropriate for direct broadcast satellite reception. However, parabolic dish procurement in developing countries is very expensive. This makes it to be unaffordable to majority of the masses. This paper focuses on design and construction of cheap parabolic satellite dish using local readily available materials. An indigenous technology is exploited to achieve the goal of this work. The paper describes from the scratch, how to design and construct a parabolic dish that can be used to intercept electromagnetic signals from the satellite stationed in the space. The proposed design approach offers a number of advantages such as cost-effectiveness and high simplicity. These are due to the fact that; it can be effectively developed with the easily available materials. Besides, it development demands neither special/long time training nor skill. Thus, both technical and non-technical personnel with minimal training can construct it either for commercial and/or personal use. -
AB Antenna Family.Qxp
WIRELESS PRODUCTS Airborne™ Antenna Product Family ACH2-AT-DP000 series ACH0-CD-DP000 series (other accessories) Airborne™ Antennas are designed for connection to 802.11 wireless devices operating in the 2.4GHz ISM band. These antennas fully support the entire line of Airborne™ wireless 802.11 products. This assortment of antennas is intended to provide OEMs with solutions that meet the demanding and diverse requirements for transportation, medical, warehouse logistics, POS, industrial, military and scientific applications. Applications The Airborne™ Antenna family offers antennas for embedded applications, fixed stations, mobile operation and client side devices, and for indoor and outdoor applications. The antennas feature RP-SMA, N-type and U.FL connectors that provide the designer with flexible ways to connect to Airborne wireless products. A wide range of antenna types and gain options enable an OEM to select the antenna that best matches their application requirements. The Recommended for AirborneTM 802.11 lower gain and smaller antennas, such as the “rubber duck” antennas, would fit applications embedded and system bridge products where the range is not required to exceed 200- 400m while the higher gain directional antennas Made for Embedded or External mounting, would be suitable for extended range that require greater than 800m reach. Embedded antennas Mobile or Fixed station, and Indoor and/or provide ranges from 50m up to 300m. Outdoor operation Specialty Antenna Embedded antenna options are intended for Select from Omni Directional, Highly applications where it is not desirable to use an Directional, or Corner Reflector external antenna, or where the enclosure or application does not allow for an external antenna. -
A Feasibility Study of Techniques for Interplanetary Microspacecraft Communications
SSC03-X-8 A Feasibility Study of Techniques for Interplanetary Microspacecraft Communications G. James Wells Dr. Robert E. Zee PhD Candidate Manager, Space Flight Laboratory [email protected] [email protected] (416) 667-7731 (416) 667-7864 Space Flight Laboratory University of Toronto Institute For Aerospace Studies 4925 Dufferin Street, Toronto, Ontario, Canada, M3H 5T6 Abstract. The increasing capabilities and low cost of microsatellites makes them ideal tools for new and advanced space science missions, including their possible use as interplanetary exploration probes. There are many issues that have to be resolved when it comes to employing microspacecraft on such missions. One problem is how to maintain a reliable communications link with the microspacecraft over long, interplanetary distances. Solutions to this problem include either improving the spacecraft transceiver/antenna, using a very large antenna on the ground, or using an array of small antennas on the ground. When looking at the feasibility and costs of these alternatives, it is shown that an array seems to be an ideal solution to the problem. By using several digital signal processing techniques, it should be possible to array a group of commercial-grade amateur ground stations together to synthesize a large-aperture antenna capable of communicating over interplanetary distances while keeping the costs low enough to be sustained by a microspace program. Future hardware experiments will be performed to confirm. Introduction a reasonably wide-bandwidth data link between the ground and a microsatellite at a very high altitude. The increasing capabilities and low cost of Most microsatellites in LEO can maintain a downlink micorsatellite missions make them attractive for data rate of no more than 128 kbps. -
Performance Analysis of MIMO Spatial Multiplexing Using Different Antenna Configurations and Modulation Technique in Rician Channel Hardeep Singh, Lavish Kansal
International Journal of Scientific & Engineering Research, Volume 5, Issue 6, June-2014 34 ISSN 2229-5518 Performance Analysis of MIMO Spatial Multiplexing using different Antenna Configurations and Modulation Technique in Rician Channel Hardeep Singh, Lavish Kansal Abstract— MIMO systems which employs multiple antennas at the transmitter as well as at the receiver side is the key technique to be employed in next generation wireless communication systems. MIMO systems provide various benefits such as Spatial Diversity, Spatial Multiplexing to improve the system performance. In this paper the MIMO SM system is analysed for different antenna configurations (2×2, 3×3, 4×4) in Rician channel. The performance of the MIMO SM system is investigated for higher order modulation schemes (M-PSK, M-QAM) and Zero Forcing equalizer is employed at the receiving side. The simulation results points that if antenna configurations are shifted from 2×2 to 3×3 configuration, an improvement of 0 to 2.9 db in SNR is being noted and an improvement of 0 to 2.9 db is visualized if antenna configurations are changed from 3×3 to 4×4 configuration. Index Terms— Multiple Input Multiple Output (MIMO), Zero Forcing (ZF), Spatial Multiplexing (SM), M-ary Phase Shift Keying (M-PSK) M-ary Quadrature Amplitude Modulation (M-QAM), Bit Error Rate (BER), Signal to Noise Ratio (SNR). —————————— —————————— 1 INTRODUCTION IMO (Multiple Input Multiple Output) systems employ higher extend, but the benefits of beamforming technique are multiple antennas at both the ends of a communication limited in such environments. Mlink. The MIMO systems provide various applications In order to obtain channel state information at receiving side, such as beamforming (increasing the average SNR at receiver the pilot bits are sent along with the transmitted sequence to side), Spatial Diversity (to achieve good BER at low SNR), Spa- estimate the channel state. -
Microwave Antennas Ks-5708 List 1 Perforated Parabolic Antenna Description
402-431-100 PRACTICES SECTION BELL SYSTEM Issue 1, July, 1947 Plont Series AT&TCo Standard MICROWAVE ANTENNAS KS-5708 LIST 1 PERFORATED PARABOLIC ANTENNA DESCRIPTION CONTENTS PAGE 2. CIRCUIT DESCRIPTION CAl 57" Parabolic Reflector Antenna 1. GENERAL . 2.01 The layout of this antenna is shown in 2. CIRCUIT DESCRIPTION Figure 1, page 4. It has a wave guide feed at the focal point of the parabolic reflector and CAl 57" Parabolic Reflector Antenna sprays the electromagnetic energy at it in the form of spherical waves. The waves in turn are 3. EQUIPMENT FEATURES . reflected outward as essentially plane waves as a result of the contour. The narrowness of beam CAl 57" Parabolic Reflector Antenna depends upon the diameter of the reflector, which in this case is 57 inches. This develops a 4. TRANSMISSION CHARACTERISTICS . 2 beam width of about 3.5 degrees between 3 db points as shown in the directivity pattern in CAl 57" Parabolic Reflector Antenna 2 Figure 2, page 5. The gain of the antenna at 4100 me is 31 db over a half-wave dipole; the 5. PHOTOGRAPH AND FIGURES 2 gain vs. frequency characteristic is shown in Figure 3, page 6. The back-to-hack pickup by a like antenna is about 75 db down. _'"_]. GENERAL 1.01 This section pertains to the 57" parabolic 3. EQUIPMENT FEATURES (KS-5708). Circuit and reflector antenna CAl 57" Parabolic Reflector Antenna equipment data are included, as well as trans mission characteristics. Related photographs 3.01 The parabolic dish is a perforated alumi- and drawings are also included. -
Analysis of Dual-Channel Broadcast Antennas
Analysis of Dual-Channel Broadcast Antennas Myron D. Fanton, PE Electronics Research, Inc. Abstract—The design concept is discussed for slotted UHF antennas to be located on the side of the tower, then the coverage needs of that allows the combining of a high power NTSC channel with an the station must be reviewed prior to making a decision on the adjacent DTV channel assignment using a single transmission line antenna type. Slotted antenna designs have been used and antenna. extensively for directional side mounted antennas and for extremely high power (200 kW NTSC) side mounted omni- Index Terms—Antenna Array, Slot Antennas, Antenna Bandwidth. directional antennas. I. INTRODUCTION 1.10 or UHF channels in the United States, slotted antenna 1.09 designs are typically used [1]. A primary factor in their use F 1.08 has been the ability to make the support structure of the antenna an integral part of the transmitting components. Because the 1.07 frequencies assigned to UHF allow the use of relatively small 1.06 antenna elements, the removal of part of the pipe wall to create 1.05 slots was possible with only a minimal impact an its structural VSWR integrity. This resulted in an antenna with low wind-load 1.04 characteristics and was relatively economical to fabricate. 1.03 As television markets expanded, demographics changed 1.02 and competitive pressures fostered the need for UHF stations to increase their coverage. This required higher effective radiated 1.01 1.00 powers (ERP). And as higher power transmitters came to 572 574 576 578 580 582 584 market, other benefits unique to the slotted antenna design Frequency (MHz) became evident: exceptional reliability even at extremely high Figure 1: Dual Channel Antenna VSWR input power levels and more precise control over the shaping of the elevation pattern.