Kepler’s Laws in Satellite Communication
Kepler’s Laws of planetary motion Kepler’s laws apply quite generally to any two bodies in space that interact through gravitation. The more massive of the two bodies is referred to…
Gate Turn Off Thyristor (GTO) | switching performance
Gate Turn Off (G.T.O.) Thyristor Gate Turn Off (G.T.O.) Thyristor: A gate turn-off thyristor, a pnpn device, can be turned on like an ordinary thyristor by a pulse of positive…
Servomotor : AC Servomotor, DC Servomotor
Servomotor Servomotor: The servomotors are used to convert an electrical signal (control voltage) applied to them into an angular displacement of the shaft. They are normally coupled to the controlled…
Erbium-Doped Fiber Amplifiers (EDFAs)
Erbium-Doped Fiber Amplifiers (EDFAs) Erbium-doped fiber amplifiers (EDFAs) make use of rare-earth elements such as erbium (Er3+) as amplification medium. It is doped into the fiber core during the manufacturing…
Raman fiber amplifier (RFA)
Raman fiber amplifier (RFA) A Raman fiber amplifier (RFA) is based on an intrinsic non-linearity present in the form of a stimulated Raman scattering (SRS) mechanism. When a high-power optical…
Semiconductor Optical Amplifiers (SOA)
Semiconductor Optical Amplifiers (SOA) A semiconductor optical amplifier (SOA), also known as a laser amplifier, is an active medium of a semiconductor laser. In other words, an SOA is a…
Insulated Gate Bipolar Transistor (IGBT)
Insulated Gate Bipolar Transistor (IGBT) There are numerous types of power semiconductor switches and among these switches, the insulated gate bipolar transistor (1GBT), which combines some of the features of…
Optical Amplifier | Power Amplifier, In-line, Pre-amplifier
Optical Amplifier Optical Amplifier: An optical amplifier is a widely used device in optical fiber communications for the purpose of amplification the optical signal generated by an optical transmitter. The…
Fiber Fabrication Methods or Techniques
Fiber Fabrication Methods Fiber Fabrication Methods or Techniques: Fabrication of all-glass fibers is a two-stage process. The first stage consists of producing a pure glass and converting it into a…
Diversity Techniques in Wireless Communication
Diversity Techniques Diversity is a good technique applied in mobile communication receiver circuits where there are multipath environments. The diversity techniques use the nature of the propagation path characteristics for…