free-space antenna

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• Free-space path loss — In telecommunication, free space path loss (FSPL) is the loss in signal strength of an electromagnetic wave that would result from a line of sight path through free space, with no obstacles nearby to cause reflection or diffraction. It does not… …   Wikipedia

• Free-Space Optics — Ein 8 Strahl FSO Gerät, das über etwa 2 km eine Datenrate von 1 Gb/s erreicht. Die große Linse in der Mitte ist der Empfänger, die kleineren außen herum die Sender. Bei Optischem Richtfunk, englisch: Free Space Optics (FSO), auch Optische… …   Deutsch Wikipedia

• Free Space Optics — Ein 8 Strahl FSO Gerät, das über etwa 2 km eine Datenrate von 1 Gb/s erreicht. Die große Linse in der Mitte ist der Empfänger, die kleineren außen herum die Sender. Bei Optischem Richtfunk, englisch: Free Space Optics (FSO), auch Optische… …   Deutsch Wikipedia

• Laser Interferometer Space Antenna — For other uses of this acronym, see LISA (disambiguation). Laser Interferometer Space Antenna Artist s conception of LISA spacecraft Operator ESA, NASA Satellite of Sun The Laser Interfe …   Wikipedia

• Antenna measurement — techniques refers to the testing of antennas to ensure that the antenna meets specifications or simply to characterize it. Typical parameters of antennas are gain, radiation pattern, beamwidth, polarization, and impedance.The antenna pattern is… …   Wikipedia

• Antenna (radio) — Whip antenna on car …   Wikipedia

• Antenna factor — In telecommunications, the antenna factor AF (unit: 1/m) is defined as the ratio of the incident electromagnetic field strength E (units: V/m or µV/m) to the voltage V (units: V or µV) on the line connection of an antenna:: AF = frac EVIf all… …   Wikipedia

• Metamaterial antenna — This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the Z element inside the square that acts as a metamaterial, greatly… …   Wikipedia

• Free drift — mode refers to a state of motion engaged by an object in orbit, whereby constant attitude is not maintained. When attitude is not maintained, the object is said to be in free drift, thereby relying on its own inertia to avoid attitude drift.This… …   Wikipedia

• space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… …   Universalium

• Space-based solar power — Left: Part of the solar energy is lost on its way through the atmosphere by the effects of reflection and absorption. Right: Space based solar power systems convert sunlight to microwaves outside the atmosphere, avoiding these losses, and the… …   Wikipedia