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Free Mobile S.A.S. is a French telecommunications company, subsidiary of Free S.A.S. that provides wireless Internet to consumers in France. It was the fourth mobile network operator to obtain a metropolitan French 3G license in 2009. It also obtained a 4G license in 2011. Free Mobile provides wireless services to 15.217 million subscribers as ...
Free-space optical communication ( FSO) is an optical communication technology that uses light propagating in free space to wirelessly transmit data for telecommunications or computer networking. "Free space" means air, outer space, vacuum, or something similar. This contrasts with using solids such as optical fiber cable .
μ 0 ≈ 12.566 × 10 −7 H/m is the magnetic constant, also known as the permeability of free space, ε 0 ≈ 8.854 × 10 −12 F/m is the electric constant, also known as the permittivity of free space, c is the speed of light in free space, [9] [10] The reciprocal of Z 0 is sometimes referred to as the admittance of free space and ...
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Free-space path loss. In telecommunication, the free-space path loss ( FSPL) (also known as free-space loss, FSL) is the attenuation of radio energy between the feedpoints of two antennas that results from the combination of the receiving antenna's capture area plus the obstacle-free, line-of-sight (LoS) path through free space (usually air). [ 1]
The vacuum magnetic permeability (variously vacuum permeability, permeability of free space, permeability of vacuum, magnetic constant) is the magnetic permeability in a classical vacuum. It is a physical constant, conventionally written as μ0 (pronounced "mu nought" or "mu zero"). It quantifies the strength of the magnetic field induced by an ...
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Mobile networks. France currently has 4 mobile networks, Orange, SFR, Bouygues Telecom and Free all of which are licensed for UMTS. All except Free are also licensed for GSM. In 2016 Q3, Orange had 28.966 million mobile phone customers, SFR had 14.577 million, Bouygues had 12.660 million, Free Mobile had 12.385 million, and the MVNOs had 7.281 ...