What is a parabolic antenna used for?
Parabolic antennas are used as high-gain antennas for point-to-point communications, in applications such as microwave relay links that carry telephone and television signals between nearby cities, wireless WAN/LAN links for data communications, satellite communications and spacecraft communication antennas.
What is the gain of a parabolic antenna?
In fact the parabolic reflector antenna gain can be as high as 30 to 40 dB. These figures of gain are not easy to achieve using other forms of antenna.
What are the two main parts of a parabolic antenna?
There are two main elements to any parabolic reflector antenna:
- Radiating system: The radiating element within the parabolic reflector antenna can take a variety of forms. In some antennas it may be a simple dipole, in others a horn.
- Reflector: The reflector is the distinctive part of the parabolic reflector antenna.
How far can a parabolic antenna reach?
This antenna features high gain, long coverage, light weight, compact structure and excellent wind-resistance. It is used for outdoor and the range is up to 56 km(34.8 miles) .
Is parabolic antenna better?
Parabolic antennas are the best choice when you need a lot of gain. The gain of the antenna actually increases with the frequency. This is why most parabolic dish antennas are used for 1 GHz or higher signals such as microwave data links, though they can be used for frequencies as low as 100 MHz.
Which is the best description of a parabolic antenna?
A parabolic antenna is an antenna that uses a parabolic reflector, a curved surface with the cross-sectional shape of a parabola, to direct the radio waves. The most common form is shaped like a dish and is popularly called a dish antenna or parabolic dish. The main advantage of a parabolic antenna is…
When was the first parabolic reflector antenna made?
German physicist Heinrich Hertz constructed the world’s first parabolic reflector antenna in 1888. The antenna was a cylindrical parabolic reflector made of zinc sheet metal supported by a wooden frame, and had a spark-gap excited 26 cm dipole as a feed antenna along the focal line.
When did Heinrich Hertz invent the parabolic antenna?
The parabolic antenna was invented by German physicist Heinrich Hertz during his discovery of radio waves in 1887.