Radio‐Frequency Spectrum of Metastable N2(A 3Σu+). I. Magnetic Hyperfine and Electric Quadrupole Constants

1970 ◽  
Vol 53 (6) ◽  
pp. 2290-2303 ◽  
Author(s):  
R. S. Freund ◽  
T. A. Miller ◽  
D. De Santis ◽  
A. Lurio
Keyword(s):  
Radio Frequency ◽  
Frequency Spectrum ◽  
Electric Quadrupole ◽  
Magnetic Hyperfine ◽  
Radio Frequency Spectrum

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).

Photonic-chip-based radio-frequency spectrum analyser with terahertz bandwidth

2009 ◽  
Vol 3 (3) ◽  
pp. 139-143 ◽  
Author(s):  
Mark Pelusi ◽  
Feng Luan ◽  
Trung D. Vo ◽  
Michael R. E. Lamont ◽  
Steven J. Madden ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Frequency Spectrum ◽  
Spectrum Analyser ◽  
Radio Frequency Spectrum
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