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To allow the feed to be placed at a convenient point
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∙ 14y ago
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Is parasitic elements are used in yagi-uda antenna?
Yes - reflector element and directional elements.
Why negative feed back used in oscillator?
A positive
Why is used the balancing line in boiler feed pump and its direction of flow?
In boiler feed pumps usually the discharge pressure is 20 to 30 times tie suction Pressure so to protect the pump balancing line is given from discharge to suction.
Are Passive reflectors used in both Active and passive Satellite system?
Yes. The most common antenna for satellite systems is the 'Dish'.The dish is a parabolic , passive, reflector.It merely reflects and concentrates the signal to the LNB receiver.Transmission also works this way, bouncing the signal off the dish, to concentrate it in one direction, in a narrow beam.
What is pressure shaft?
Pressure Shaft is enclosed pipe/channel used to deliver/feed water to hydraulic turbines in respect of hydro power plant.
What are the material is used manufacturing Parabolic reflector antenna?
A parabolic reflector antenna is made of fiberglass or metal (usually aluminum).
What type of reflector is a satellite dish?
A satellite uses a Parabolic reflector,What are the mirrors used for? A parabolic reflector (or dish or mirror) is a reflective device used to collect or project energy such as light, sound, or radio waves. Its shape is that of a circular paraboloid, that is, the surface generated by a parabola revolving around its axis. The parabolic reflector transforms an incoming plane wave traveling along the axis into a spherical wave converging toward the focus. Conversely, a spherical wave generated by a point source placed in the focus is transformed into a plane wave propagating as a collimated beam along the axis
What two types antenna used for terrestrial microwave communication?
Virtually all terrestrial microwave communication is point-to-point, using parabolic reflector antennas. A small percentage uses yagi, helical, corner reflector, or flat-plate reflector antennas. Essentially no "omnidirectional" antennas are used in microwave.
Why you are using parabolic shape for radio telescope?
A parabolic shape is used for all reflecting collectors ... visible light telescope, radio telescope, satellite receiver, etc. A parabolic reflector directs all parallel incoming rays toward one point, called the 'focus' of the parabola.
What is a reflector that uses more than one secondary mirror is called?
Reflector telescopes are cheaper to make than refractors of the same size than passing through it, only one side of the reflector telescope's Often a secondary mirror is used to redirect the light into a more convenient viewing spot.
Why the parabola used in satellite dish?
Parallel rays, such as those from a very distance source, are focussed by a parabolic reflector so that they all meet at the focus of the parabola. This results in a stronger signal.
Why a parabolic or concave polished reflector is used in an electric heater?
Electric Heaters contain a heating element that reaches a high temperature. The element is usually packaged inside a glass envelope resembling a light bulb and with a parabolic reflector to direct the energy output away from the body of the heater. The element emits infrared radiationthat travels through air or space until it hits an absorbing surface(parabolic reflector), where it is partially converted to heat and partially reflected. This heat directly warms people and objects in the room, rather than warming the air.
Which type antenna used for radar communication?
Radar and communications are two different applications of radio waves. For radar, directional antennas are used, and the normal antenna for a ship installation would be a parabolic reflector with a rectangular aperture about 5 times wider than its height. This gives a narrow beam in the horizontal direction, and pulses are sent out and detected after being reflected by the target.
What are the lenses called in a reflector telescope?
The lenses used in reflector telescope is the concave lens.
What does 'parabolic' mean in mathematics?
Parabolic means that which is expressed by a parable. This word can also be used to describe something that resembles or is part of a parabola or paraboloid. Parabolic has the same meaning as parabolical.
Is lead an excellent reflector of heat?
yes lead (Pb) is an excellent reflector of heat and is used widely
What type of antenna is used for satellite communication?
parabolic
