Space systems � Spacecraft system level radio frequency (RF) performance test in compact range

2021 ◽  
Keyword(s):  
Radio Frequency ◽  
Performance Test ◽  
System Level ◽  
Space Systems ◽  
Compact Range ◽  
Rf Performance

Radio Frequency Support for Space Systems Based on Multi-Satellite Constellations Taking into Account the ITU-R Requirements and the WRC-19 Results

2021 ◽  
Vol 8 (4) ◽  
pp. 72-76
Author(s):  
А. А. Talanov ◽  
◽  
S. А. Fedotov ◽  
А. М. Stepanov ◽  
◽  
...  
Keyword(s):  
Radio Frequency ◽  
Frequency Spectrum ◽  
Communication Systems ◽  
Electromagnetic Compatibility ◽  
Satellite Communication ◽  
Space Systems ◽  
Satellite Constellations ◽  
Broadband Internet ◽  
State Commission ◽  
Radio Frequency Spectrum

Deployment of space systems based on multi-satellite constellations to provide broadband Internet access and communication services acutely raises the question of their radio frequency support including issues of electromagnetic compatibility (EMC) between competing space systems using multi-satellite constellations (StarLink, OneWeb, Kuiper, etc.), their EMC with traditional space systems (satellite communication systems that employ spacecraft in geostationary and non-geostationary orbits, space systems of other services), as well as regulatory issues of entering into service and staged deployment of space systems. The article formulates the problematic issues of radio frequency support of modern space systems taking into account the trends of satellite constellations deployment and proposes the solutions with consideration to international and national requirements in the regulation of radio frequency spectrum including the ITU requirements and the requirements of Russian State Commission for Radio Frequencies. The paper shows the ways to share the radio frequency spectrum to meet new requirements of the World Radiocommunication Conference 2019 (WRC-19).

RF performance test and current operations of LHRF and ICRF heating systems on JT-60

1987 ◽  
Author(s):  
T. Imai ◽  
T. Nagashima ◽  
H. Kimura ◽  
K. Uehara ◽  
K. Annoh ◽  
...  
Keyword(s):  
Performance Test ◽  
Heating Systems ◽  
Rf Performance ◽  
Icrf Heating

Acoustic Design of Large Reverberant Chambers

1990 ◽  
Vol 33 (5) ◽  
pp. 19-23
Author(s):  
Frank Slingerland
Keyword(s):  
Sound Field ◽  
Input Power ◽  
System Level ◽  
Space Systems ◽  
Power Requirement ◽  
Field Uniformity ◽  
Large Satellite ◽  
Noise Input ◽  
Acoustic Fatigue ◽  
Permit System

Acoustic testing of space systems and components is essential to the assurance of launch viability. Large acoustic test chambers that permit system-level testing are rapidly becoming the norm. The initial cost of such installations is typically 5 percent of that of a single large satellite. Their cost-effectiveness is easily demonstrated. This article provides design information on calculation of noise input power requirement; sound field uniformity; acoustic fatigue of chamber; noise breakout and soil vibration; and future trends in design.

Characterization of Electromagnetic Properties of MID Materials for High Frequency Applications up to 67 GHz

2014 ◽  
Vol 1038 ◽  
pp. 63-68 ◽  
Author(s):  
Quang Huy Dao ◽  
Aline Friedrich ◽  
Bernd Geck
Keyword(s):  
Radio Frequency ◽  
Material Properties ◽  
High Frequency ◽  
Coplanar Waveguide ◽  
Electromagnetic Properties ◽  
Research Project ◽  
Material Parameters ◽  
Important Material ◽  
Rf Performance

This paper presents results of the research project: "Characterization of the radio frequency (RF) properties of LDS-MID" where RF parameters of laser direct structureable (LDS) molded interconnect device (MID) materials were investigated. First of all the most important material parameters influencing the RF performance of a device are introduced. In the next section the broadband characterization of the metallization and material properties using a coplanar waveguide (CPW) is described. For a selected LDS material the conduction losses due to different metallization compositions are discussed in detail.

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