scholarly journals Four‐dimensional relativistic scattering of electromagnetic waves from an arbitrary collection of moving lossy dielectric spheres

2021 ◽  
Vol 15 (2) ◽  
pp. 180-191
Author(s):  
Hamed Radpour ◽  
Ali Pourziad ◽  
Kamal Sarabandi
Keyword(s):  
Electromagnetic Waves ◽  
Relativistic Scattering ◽  
Dielectric Spheres ◽  
Lossy Dielectric ◽  
Arbitrary Collection

The scattering properties of anisotropic dielectric spheres on electromagnetic waves

2003 ◽  
Vol 16 (1) ◽  
pp. 165-179 ◽  
Author(s):  
Hui Chen ◽  
Weiyi Zhang ◽  
Zhenlin Wang ◽  
Naiben Ming
Keyword(s):  
Electromagnetic Waves ◽  
Anisotropic Dielectric ◽  
Dielectric Spheres

Seti Space Missions

1997 ◽  
Vol 161 ◽  
pp. 761-776 ◽  
Author(s):  
Claudio Maccone
Keyword(s):  
Electromagnetic Waves ◽  
Space Missions ◽  
Gravitational Lens ◽  
The Sun ◽  
Space Antenna ◽  
Focal Distance ◽  
Large Space ◽  
The Earth ◽  
Space Antennas ◽  
New Space

AbstractSETI from space is currently envisaged in three ways: i) by large space antennas orbiting the Earth that could be used for both VLBI and SETI (VSOP and RadioAstron missions), ii) by a radiotelescope inside the Saha far side Moon crater and an Earth-link antenna on the Mare Smythii near side plain. Such SETIMOON mission would require no astronaut work since a Tether, deployed in Moon orbit until the two antennas landed softly, would also be the cable connecting them. Alternatively, a data relay satellite orbiting the Earth-Moon Lagrangian pointL2would avoid the Earthlink antenna, iii) by a large space antenna put at the foci of the Sun gravitational lens: 1) for electromagnetic waves, the minimal focal distance is 550 Astronomical Units (AU) or 14 times beyond Pluto. One could use the huge radio magnifications of sources aligned to the Sun and spacecraft; 2) for gravitational waves and neutrinos, the focus lies between 22.45 and 29.59 AU (Uranus and Neptune orbits), with a flight time of less than 30 years. Two new space missions, of SETI interest if ET’s use neutrinos for communications, are proposed.

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