Improvement of Spurious Noises Generated from Magnetrons Driven by DC Power Supply after Turning off Filament Current(Special Issue on Microwave and Millimeter Wave Technology)
スポンサーリンク
概要
- 論文の詳細を見る
Microwave Power Transmission (MPT) technology is one of the most essential parts for Solar Power Station/Satellite (SPS). We study on application of magnetrons as DC-RF converters for the MPT transmitting system. Magnetrons cost much cheaper, have much higher DC-RF efficiency over 70% and much lighter system weight per 1 watt RF output than semiconductor amplifiers although they have wider band-width of the fundamental frequency and spurious noises in various frequencies. Spurious noises are radiated from the transmitting system and interfere in the other communication systems both in space and on the Earth. The objective of this study is the improvement of the spurious noises generated from magnetrons. Experimentally, magnetrons driven by DC stabilized power supply had not only narrower bandwidth of the fundamental frequency but also lower spurious noise levels when filament current is turned off than when it is turned on. Some spurious noises are probably caused by the intermodulation between the low frequency spurious noises, which frequency is below 1 GHz, and the fundamental or the harmonics. We also verified that the harmonics levels of the measured magnetron in our measurement system were below - 70dBc, which are comparable to or better than those of some semiconductor amplifiers, and that the harmonics were not improved greatly when the filament current was turned off because the source of the harmonics is the distortion of the fundamental.
- 社団法人電子情報通信学会の論文
- 2003-08-01
著者
-
MATSUMOTO Hiroshi
Radio Science Center for Space and Atmosphere, Kyoto University
-
SHINOHARA Naoki
Radio Science Center of Space and Atmosphere, Kyoto University
-
Mitani Tomohiko
Laboratory Of Applied Radio Engineering For Humanosphere Rish Kyoto University
-
Shinohara Naoki
Laboratory Of Applied Radio Engineering For Humanosphere Rish Kyoto University
-
Shinohara N
Kyoto Univ. Uji‐shi Jpn
-
Shinohara Naoki
Radio Science Center Of Space And Atmosphere Kyoto University
-
Shinohara Naoki
Radio Atmospheric Science Center Kyoto University
-
Matsumoto H
Department Of Electronics And Bioinformatics Science And Technology Meiji University
-
MITANI Tomohiko
Radio Science Center for Space and Atmosphere, Kyoto University
-
HASHIMOTO Kozo
Radio Science Center for Space and Atmosphere, Kyoto University
-
Hashimoto Koichi
Research Institute For Sustainable Humanosphere Kyoto University
-
Matsumoto Hiroshi
Radio Atmospheric Science Center Kyoto University
関連論文
- Propagation Characteristics of ELF / VLF Electromagnetic Waves in the Martian Ionosphere and the Possibility for Detection of Martian Atmospherics by NOZOMI Observations
- Preparation of Platinum Palladium Monoxide Pt_Pd_xO Thin Films
- On a Possibility to Decrease Magnetic Intensity in Microwave/DC Cyclotron Wave Converter(Microwaves, Millimeter-Waves)
- A New Microwave Input Amplifier with High Self-Protection and Rapid Recovery
- Analysis of DC Electric Fields Observed by SS-520-2 Sounding Rocket in the Polar Region, Vol.J86-B,No.2, pp.236-244
- Identification Tests of Aristolochic Acid in Crude Drugs by Reversed-Phase TLC/Scanning Densitometry
- Analysis of Crude Drugs Using Reversed-Phase TLC/Scanning Densitometry (I) : Identification of Saiko, Akamegasiwa and Sanshuyu
- Detection of Thyroxine in Dietary Supplements Using an Enzyme-Linked Immunosorbent Assay
- Identification of Oil-Soluble Coal Tar Dyes in Cosmetics Using Reversed-Phase TLC/Scanning Densitometry
- A Driving Test of a Small DC Motor with Rectenna Array
- Preparation and Optical Properties of Zirconium-Titanium-Oxide Thin Films by Reactive Sputtering
- Evaluation of Hafnium-Titanium-Oxide Thin Films Prepared by Reactive Sputtering
- Atomic Composition and Structural Properties of Blue Emitting BaAl_2S_4:Eu Electroluminescent Thin Films
- Blue-Emitting BaAl_2S_4:Eu Thin-Film Electroiluminescent Devices Prepared by Two Targets pulse Electron Beam Evaporation(Special Issue on Electronic Displays)
- High-Luminance Blue-Emitting BaAl_2S_4:Eu Thin-Film Electroluminescent Devices
- Isosceles-Trapezoidal-Distribution Edge Tapered Array Antenna with Unequal Element Spacing for Solar Power Satellite
- New Stochastic Algorithm for Optimization of Both Side Lobes and Grating Lobes in Large Antenna Arrays for MPT
- Fundamental study on localized heating in hyperthermia using phase control of long-wavelength microwaves (特集 電気関係学会関西支部連合大会)
- Study of Isosceles Trapezoidal Edge Tapered Phased Array Antenna for Solar Power Station/Satellite(Antennas and Propagation)
- Electrostatic quasi-monochromatic waves in the downstream region of the Earth's bow shock based on Geotail observations
- Improvement of Spurious Noises Generated from Magnetrons Driven by DC Power Supply after Turning off Filament Current(Special Issue on Microwave and Millimeter Wave Technology)
- Solar Power Station/Satellite (SPS) with Phase Controlled Magnetrons(Special Issue on Microwave and Millimeter Wave Technology)
- Down-Sizing of Rectification Circuit for the Microwave PowerTransmission (IEICE Trans., Vol. J86-B, No.5 in Japanese)
- Experimental Study on Oscillation Characteristics of Magnetron after Turning off Filament Current
- Microwave Energy Transmission Experiments and Study of Rectenna
- Computer experiments for interactions of inhomogeneous plasma and HF electromagnetic waves on ionospheric heating experiments (extended abstract)
- Analysis of Wave Normal and Poynting Vectors of the Chorus Emissions Observed by GEOTAIL
- Magnetic Radiations from Harness Wires of Spacecraft
- Magnetic Radiations from Harness Wires of Spacecraft
- Inhibition of Iron/Ascorbate-Induced Lipid Peroxidation by an N-Terminal Peptide of Bovine Lactoferrin and Its Acylated Derivatives
- Cyclotron Wave Converter of Microwaves into DC
- Influence of density irregularities on high-frequency wave propagation:Computer experiments of stimulated emissions
- Computer Experiments on a Three-Wave Coupling in Association with Microwave Power Transmission in Space Plasma(Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
- Enhancement of Hematopoietic Response of Mice by Intraperitoneal Administration of a β-Glucan, SSG, Obtained from Sclerotinia sclerotiorum
- Optimization of uniformly excited phased array and spread spectrum pilot signal for microwave power transmission(RECENT RESEARCH ACTIVITIES)
- Study on Wireless Power Distribution System for Buildings(RECENT RESEARCH ACTIVITIES)
- A fundamental study of a microwave pretreatment system for wood biomass conversion(RECENT RESEARCH ACTIVITIES)
- A self-steering array and its application to phase synchronization of transmitter units and Solar Power Satellite(RECENT RESEARCH ACTIVITIES)
- Plasma wave investigation in Mercury magnetosphere(RECENT RESEARCH ACTIVITIES)
- Plasma wave investigation in Mercury magnetosphere(RECENT RESEARCH ACTIVITIES)
- Search for Jovian Hectometric and Kilometric Radiation by GEOTAIL Spacecraft during the Impact of Comet Shoemaker-Levy9
- The Effects of a Highly Branched β-1,3-Glucan, SSG, Obtained from Sclerotinia sclerotiorum IFO 9395 on the Growth of Syngeneic Tumors in Mice
- Correlations of AKR index with Kp and Dst indices
- Analysis of Crude Drugs Using Reversed-Phase TLC/Scanning Densitometry (I) : Identification of Saiko, Akamegasiwa and Sanshuyu
- Investigation of plasma density disturbances caused by spacecraft-plasma interactions at 4 Rs
- Tethered solar power satellite