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It can gather more light
Ferne Streich
Wiki User
∙ 12y agoA parabolic reflector or paraboloid allows the radio wave energy from a simple antenna to be concentrated into a narrow beam, in the same way as a car headlight works. This makes it seem more powerful in one direction, so it can travel further.
Wiki User
∙ 10y agoThe antennas focus the radio signal into a narrow beamthat can be aimed at the satellite (or from the satellite at the ground station) allowing lower power transmitters and receivers to be used with no loss of signal strength.
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What is a Marconi antenna?
The term "Marconi antenna" usually refers to a two part antenna consisting of a vertical portion and a "reflective" or "ground" portion. When constructed properly, it is very similar to a vertically oriented dipole, in that one element is "up" and the other "down". The reflective portion is not always a physical element, but often either natural earth ground (where the soil conductivity is sufficient) or ground "radials" - a set of wires along or just beneath the ground that act as the reflective portion. A Marconi antenna is an omni-directional (same transmit/receive in all directions) antenna that has good long distance characteristics on HF (high frequency) and MW (medium wave, or AM) frequencies. A Marconi is typically built with a 1/4 wavelength vertical element, and similar length radial(s). For example, the full wavelength for 7MHz is about 133ft. A 1/4 wavelength vertical element (and each radial) would therefore be about 33.5ft. Most AM broadcast stations use some variation of a Marconi antenna. Since an AM station at 1050 on an AM dial is equal to 1.050MHz and therefore a wavelength of over 990ft, a 1/4 wavelength vertical element would be almost 223ft for that station! The antenna was originally made using telescopic fiber glass tubes and then covered with a copper film to make them look electrically like a huge copper tube. The antenna was made by a company located in London called Bantex Antennas. This company shut down and the team of engineer was take over and built a new company called Renair Antennae Ltd, they carried manufacturing these antennas for some years. These antennas were ordered from Marconi to be mount overseas mainly. They were real big monsters!
A parabolic sound collecting dish science project?
this is a very good science project
What is a reflective curve?
a reflecting curve
How does the parabolic mirror work?
it reflects the sun rays with a mirror so that they are concentrated on a point or a line
What is called the self reflective observation of one's own sensations and feeling?
Introspection is the self-reflective observation of one's own sensations and feeling.
What is the advantage of parabolic reflective antennae?
parabolic reflector having highest directivity.
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 antenna is used for satellite communication?
parabolic
Why the parabolic antenna has parabola shape?
Parallel rays, such as those from a very distance source, are focussed by a parabolic antenna so that they all meet at the focus of the parabola. This results in a stronger signal.
Why might a parabolic reflector horn type microwave antenna be preferable to a parabolic dish type microwave antenna?
The reflector horn type antenna has greater "side lobe" rejection, directionality and sensitivity (efficiency) than a dish type.
Is there a platinum in parabolic disc antenna?
It would be a waste of precious metal if there was.
Why antena is in parabolic form?
A: For the same reason a heater is parabolic to reflect heat, For the antenna the opposite is true to focus the incoming waves
What is the difference between directed antenna and parabolic dish?
about 40 db about 40 db
What is a spherical dish antenna required for satellite tv reception?
The parabolic antenna is really not an antenna at all - but a collector/reflector, which catches and concentrates RF (radio frequency) into a tiny antenna mounted above the dish, pointed into the dish. Since satellites transmit at very high frequencies (microwave), the actual antenna can be shorter than one inch. To strenghen the signal and make aiming the antenna at the satellite easier, the parabolic reflector picks up a wider area of RF.
What are the common shapes for antenna reflectors?
A lot of parabolic reflectors are used in antennas, particularly with frequencies in the microwave region. There are a few other shapes, but they are infrequent choices for antenna designers.
Why we use patch antenna in communication?
because patch antenna are used in order to achieve higher gain small dimensions, light weight, slim size and easy manufacturing as compared with parabolic dish or other antenna's
How do dogs' ears shapes help them hear?
The shape acts like a parabolic antenna, focusing sound into the ear from a larger surface area. Simples.
