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O que (quem) é waveguide attenuator - definição

HOLLOW METAL PIPE USED TO CARRY RADIO WAVES

Waveguide antenna; Waveguide (electromagnetism); Hollow waveguide

Waveguide (optics)

STRUCTURE THAT GUIDES ELECTROMAGNETIC WAVES IN THE OPTICAL SPECTRUM

Dielectric waveguide; Optical waveguide; Optical guided waves; Slab-dielectric waveguide; Rib waveguide; Strip waveguide; Slab waveguide; Planar waveguide; Rectangular waveguide; Integrated optical waveguide; Dielectric slab waveguide; Optical waveguides

An optical waveguide is a physical structure that guides electromagnetic waves in the optical spectrum. Common types of optical waveguides include optical fiber waveguides, transparent dielectric waveguides made of plastic and glass, liquid light guides, and liquid waveguides.

https://en.wikipedia.org/wiki/Waveguide_(optics)

Impact attenuator

DEVICE INTENDED TO REDUCE THE DAMAGE

Crash attenuator; Fitch Barrier; Fitch Highway Barrier System; Fitch Inertial Systems; Crash cushion; Fitch barrier; Truck-Mounted Attenuator

An impact attenuator, also known as a crash cushion, crash attenuator, or cowboy cushion, is a device intended to reduce the damage to structures, vehicles, and motorists resulting from a motor vehicle collision. Impact attenuators are designed to absorb the colliding vehicle's kinetic energy.

https://en.wikipedia.org/wiki/Impact_attenuator

attenuator

WIKIMEDIA DISAMBIGUATION PAGE

Attenuator (disambiguation)

¦ noun a device which reduces the strength of a radio or audio signal.

Wikipédia

Waveguide (radio frequency)

In radio-frequency engineering and communications engineering, waveguide is a hollow metal pipe used to carry radio waves. This type of waveguide is used as a transmission line mostly at microwave frequencies, for such purposes as connecting microwave transmitters and receivers to their antennas, in equipment such as microwave ovens, radar sets, satellite communications, and microwave radio links.

The electromagnetic waves in a (metal-pipe) waveguide may be imagined as travelling down the guide in a zig-zag path, being repeatedly reflected between opposite walls of the guide. For the particular case of rectangular waveguide, it is possible to base an exact analysis on this view. Propagation in a dielectric waveguide may be viewed in the same way, with the waves confined to the dielectric by total internal reflection at its surface. Some structures, such as non-radiative dielectric waveguides and the Goubau line, use both metal walls and dielectric surfaces to confine the wave.

https://en.wikipedia.org/wiki/Waveguide (radio frequency)