Optimizing the antenna system of a microwave space power station

implications for the selection of operating power, frequency, and antenna size

Publisher: National Aeronautics and Space Administration, Publisher: For sale by the National Technical Information Service in [Washington, D.C.], [Springfield, Va

Written in English
Published: Downloads: 352
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Subjects:

  • Space vehicles -- Auxiliary power supply.,
  • Antenna design.,
  • Microwave transmission.,
  • Optimization.,
  • Power transmission.

Edition Notes

StatementRobert M. Manning.
SeriesNASA technical memorandum -- 100184
ContributionsUnited States. National Aeronautics and Space Administration.
The Physical Object
FormatMicroform
Pagination7 p.
ID Numbers
Open LibraryOL17115213M

Recent Wireless Power Transfer Technologies via Radio Waves - Ebook written by Naoki Shinohara. Read this book using Google Play Books app on your PC, android, iOS devices. Download for offline reading, highlight, bookmark or take notes while you read Recent Wireless Power Transfer Technologies via Radio Waves. Solar radiation is collected and converted to microwave energy by means maintained in outer space on a satellite system. The microwave energy is then transmitted to earth and converted to electrical power for distribution. USA - Method and apparatus for converting solar radiation to electrical power - Google Patents. A laser pilot beam guides the microwave power transmission to a rectenna In , science fiction writer Isaac Asimov published the science fiction short story " Reason ", in which a space station transmits energy collected from the Sun to various planets using microwave beams. Transmitting antenna system of space solar power station, ZL, ; An integrated design method for radiation and scattering performance of array antenna based on mounting height, ZL,; A electrode layout method for electrostatically formed film antenna, ZL,

This book provides a comprehensive examination of the history of the concept of solar power from space, the various designs proposed over the years and studies conducted of them, and an in-depth presentation of the technology and economic rationale for the SPS-ALPHA s:   The Handbook of Microwave and Optical Components is the most complete treatment available of both microwave and optical engineering principles, and is an excellent compendium for engineers who work in microwave and optical design, as well as engineers in other disciplines who need to understand the capabilities and limitations of microwave and optical systems. V. A. Vanke, A. A. Zaporozhets and A. V. Rachnikov, "Antenna synthesis for the SPS microwave transmission system," in SPS 91 - Power From Space, , pp. K. Itoh and Y. Ogawa, "An inland rectenna using reflector and circular microstrip antennas," in SPS 91 - Power From Space. A lightweight, efficient, microwave power transmitting antenna is disclosed, suitable for use in a space borne transmitter for beaming solar generated electrical power down to earth based receiving antennas. The space borne antenna structure is formed by modules that are structurally integrated into a multimodule antenna array.

An antenna or array that has multiple antenna elements to radiate or collect signals from different sectors in a cell. Smart, adaptive or intelligent antenna systems consist of a multi-sector antenna array with an integral signal processing capability to optimize the radiation pattern or . (Invited) Blagovest Shishkov, Naoki Shinohara, Hiroshi Matsumoto, Kozo Hashimoto, and Tomohiko Mitani, “On the Optimization of Side-Lobes in Large Antenna Arrays for Microwave Power Transmission ”, 2 nd International Symposium on Radio System and Space Plasma , Blugaria, , Proceedings pp 9. Microwave transhorizon systems—Design of beyond-the-horizon communication systems, properties of scattering and diffraction modes, multipath statistical relations, long-term and short-term field strength variations, quality of service, optimization of antenna alignment, and experimental analysis of various diversity and combining methods. An antenna is a device to transmit and/or receive electromagnetic waves. Electromagnetic waves are often referred to as radio waves. Most antennas are resonant devices, which operate efficiently over a relatively narrow frequency band. An antenna must be tuned (matched) to the same frequency band as the radio system to which it is connected.

Optimizing the antenna system of a microwave space power station Download PDF EPUB FB2

Get this from a library. Optimizing the antenna system of a microwave space power station: implications for the selection of operating power, frequency, and antenna size.

[Robert Michael Manning; United States. National Aeronautics and Space Administration.]. The power radiated by an antenna is I 2 R Watts where I 2 is r.m.s antenna current and R, is a fictitious resistance termed the radiation resistance which is a resistance which if it carries the same terminal current as the antenna on transmission will dissipate the same amount of power as the one radiated.

The power radiated by an antenna into Author: Paul Osaretin Otasowie. Microwave wireless power transmission (MWPT) is a new-style transmission mode, which has wide application on Space Solar Power Station (SSPS), Payload Spacecraft Module, high power.

Problems of antenna pointing for a space solar power station for energy transmission by using microwave beam are considered. Interference between attitude control system of station and antenna pointing system is investigated.

The influence of design data, including structure flexibility on antenna dynamics is studied. A SPS (Solar Power Station / Optimizing the antenna system of a microwave space power station book is a gigantic satellite designed as an electric power plant and transmits the electricity via microwave to a receiving site on the Earth by using phased array antennas.

We study on a microwave beam controlling method of the phased array antenna to achieve the efficient power transmission. In this paper, we describe a PAC (Position and Angle Correction.

The authors present and investigate a current technology design point for beamed microwave commercial space power. The design point requires that 25 kW be delivered to the user load with 30 percent overall system efficiency.

The key elements of the design are: an efficient rectenna at the user end; a high gain, low beam width, efficient antenna at the central space power station end; and a.

The Space Solar Power Station (SSPS) [8,9] is a huge energy system that collects and converts solar energy into electricity in space and then wirelessly transmits it to the Earth [   The concept of Solar Power Satellites (SPS) was invented by Glaser in SPS converts solar energy into microwaves and transmit it to a receiving antenna on Earth for conversion to electric power.

The key technology needed to enable the future feasibility of SPS is Microwave Power Author: Amit Sachan, Preeti Sachan. transmitting antenna), or inflowing (received) to the antenna (in the case of receiving antenna) as a function of direction angles from the antenna • Antenna radiation pattern (antenna pattern): – is defined for large distances from the antenna, where the spatial (angular) distribution of the radiated power does not depend on the.

Specifications Possible power generation of 5 to 10 gigawatts “If the largest conceivable space power station were built and operated 24 hours a day all year round, it could produce the equivalent output of ten 1 million kilowatt-class nuclear power stations.” Collector area must be between 50 (19 sq miles) and square kilometers (57 sq.

system has a system gain that depends on the design of the radio and the modulation used. The gains from the antenna at each end are added to this gain. Larger antennas provide higher gain. The free-space loss of the radio signal as it travels over the air is then subtracted from the system: the longer the link the higher the loss.

The DC-DC (or AC-DC) efficiency is the key parameter of a MPT system, which is contributed by several factors. The transmitter includes two factors: the efficiency of the microwave generator from DC to mw (microwave) η g and the transmitting antenna efficiency η microwave propagation efficiency is indicated as η p, in which the attenuation in the atmosphere should be considered.

Space solar power satellite (SSPS) is a tremendous energy system that collects and converts solar power to electric power in space, and then transmits the electric power to earth it was proposed by Dr. Peter Glaser init started to attract attention worldwide, and various concepts were proposed in the United States, Japan, Europe, and China.

Antenna Downtilt and Coverage Calculator Pasternack The Antenna Downtilt and Coverage Calculator (aka Antenna Tilt Angle Calculator) is used to determine the approximate downward angle, measured in degrees, which the transmitting antenna is to be positioned for optimal signal strength and coverage.

It also provides, given a beamwidth, the inner and outer radii of beam's. In wireless communication systems, signals are radiated in space as an electromagnetic wave by using a receiving transmitting antenna and a fraction of this radiated power is intercepted by using a receiving antenna.

An antenna is a device used for radiating or receiver radio waves. An antenna can also be. Depiction of a possible space solar power system. Image courtesy of the National Space Society blog. The solar arrays attached to a typical satellite generating GW in space and an average of 1GW on Earth would measure about 5 to 6 square kilometers and use a transmitting antenna array with a diameter of about 1 km.

This type of kilometer scale station has to be assembled in orbit due to launch capacity restrictions. Modularized design was also used to simplify the complex assembly mission and launchthe SSPS was modularly disassembled into four primary structural components: main structure modules, solar arrays modules, sub truss modules and microwave-transmitting antenna.

Free space loss, ideal isotropic antenna •P t = signal power at transmitting antenna •P r = signal power at receiving antenna •λ = carrier wavelength •d = propagation distance between antennas •c = speed of light (≈ 3 x m/s) where d and λ are in the same units (e.g., meters) ()() 2 2 2 42 4 c d fd P P r t.

The Thought Process Inscience fiction writer Isaac Asimov published a science fiction short story “Reason”, in which a space station transmitted energy collected from the sun to various planets using microwave beams. Inthe Satellite Solar Power System (SSPS) concept was first brought into limelight.

InPeter Glaser. Space-based solar power essentially consists of three functional units: A. A Solar energy collector to convert the solar energy into DC (Direct current) electricity. A DC to Microwave converter. Large antenna array to beam the Microwave power to the ground. A means of receiving power on earth, for example via microwave antennas (Rectenna).

Interference between microwave stations and Earth stations 3. Interference between microwave stations and a geostationary satel-lite in orbit In the U.S., the 4 GHz band is shared with the receive portion of an Earth station and is used predominantly by AT&T and some other long-haul carriers although use of this band by terrestrial microwave has.

Electrical power at microwave frequencies produced by solar cells or similar devices on satellite stations in space is phase modulated prior to its being beamed to earth. At the receiving station on earth, the power in the beamed signal is recovered at the modulation frequency.

In the first embodiment, the microwave signal from the power originating device drives a circularly polarized antenna. “Microwave Satellite Telecommunications: characterization of the AlphaSat receiving system and GHz Radiometer“ Azimuth co-polar and cross-polar radiation patterns Zenith co-polar and cross-polar radiation patterns This antenna minimizes received power level variations, due to satellite apparent movement (2 dB for about ± 1 degree).

Consider an arbitrary antenna radiating power P(f,T,I) within the small solid angle d: as suggested in Figure Figure Antenna system exhibiting the principle of detailed balance The principle of detailed balance says that the power received within each d: matches the.

The microwave antennas described above are useful devices in radar, radio, and satellite communications and also in wireless communication systems.

Different microwave antennas have different uses. Each characteristic of the microwave antennas makes them suitable for specific situations and systems. It is important to familiarize yourself with. Shareable Link.

Use the link below to share a full-text version of this article with your friends and colleagues. Learn more. For a large-scale MPT system, the most important parameter is the beam capture efficiency (BCE), which is the ratio of the captured microwave power by the receiving antenna array to the transmitted power by the transmitting antenna array.

InDr. Brown performed an MPT experiment with a distance of m in the laboratory. Enter the terms you wish to search for. Search. Main navigation. Products. Product Finder; Markets. Military. The key microwave components in a WPT system are the transmitter, beam control and the receiving antenna called the transmitting antenna, microwave power tubes such as magnetrons and klystrons are used as RF power sources.

However, at frequencies below 10 GHz, high power solid state devices can also be used. Shortly before the outbreak of World War II, several RDF (radar) stations in a system known as Chain Home (or CH) were constructed along the South and East coasts of Britain, based on the successful model at was a relatively simple system.

The transmitting side comprised two ft (m)-tall steel towers strung with a series of antennas between them. An overview is given of the proposed course of development of a satellite solar power station (SSPS).

The technologies under consideration for solar energy conversion, power transmission to earth, and transportation of the system or system components to orbit are discussed. A preliminary design for an SSPS based on single-crystal silicon solar cell arrays has been evolved.shape the radiated power in space e.g.: it enhances the power in some wanted directions and suppresses the power in other directions.

Frequency bandwidth: "The range of frequencies within which the performance of the antenna, with respect to some characteristics, conforms to a specified standard".Final Report. Project Manager, Ronald L. Thomas, Power Systems Division, NASA Lewis Research Center, Cleveland, Ohio Abstract A feasibility study of a satellite solar power station (SSPS) was conducted to (1) explore how an SSPS could be "flown" and controlled in orbit; (2) determine the techniques needed to avoid radiOI.