Table of Contents
- 1 How does a parabolic reflector antenna work?
- 2 What are the main characteristics of a parabolic reflector that make it highly suitable for use as an antenna reflector?
- 3 Which feed is used in parabolic reflector antenna?
- 4 How do I choose a parabolic antenna?
- 5 What is offset feeding parabolic reflector antenna?
How does a parabolic reflector antenna work?
If a Parabolic Reflector antenna is used for transmitting a signal, the signal from the feed, comes out of a dipole or a horn antenna, to focus the wave on to the parabola. The same antenna is used as a receiver. When the electromagnetic wave hits the shape of the parabola, the wave gets reflected onto the feed point.
What are the main characteristics of a parabolic reflector that make it highly suitable for use as an antenna reflector?
Some of the major advantages of the parabolic reflector antenna include the following:
- High gain: Parabolic reflector antennas are able to provide very high levels of gain.
- High directivity: As with the gain, so too the parabolic reflector or dish antenna is able to provide high levels of directivity.
What are reflector antennas used for?
Reflector antenna. An antenna consisting of one or more reflecting surfaces and a feed system for transmitting and/or receiving electromagnetic waves.
Which feed is used in parabolic reflector antenna?
A variety of different feed techniques can be used with parabolic reflector antennas including: focal feed, Cassegrain, Gregorian, offset feed. It is possible to use one of a variety of different feed arrangements when using a parabolic reflector antenna.
How do I choose a parabolic antenna?
These factors include the following:
- Diameter of reflecting surface The larger the diameter of the reflecting surface of the antenna the higher the parabolic reflector gain will be.
- Operational wavelength: The parabolic reflector antenna gain is dependent upon the reflector size in terms of wavelengths.
What are the advantages of loop antenna?
Benefits or advantages of Loop Antenna ➨It is light in weight. ➨It is simple and compact in structure. ➨It is economical. ➨It is suitable for portable applications such as direction finding etc.
What is offset feeding parabolic reflector antenna?
An offset dish antenna or off-axis dish antenna is a type of parabolic antenna. In technical terms this reduces the aperture efficiency of the antenna, reducing its gain. In the offset design, the feed is positioned outside the area of the beam, usually below it on a boom sticking out from the bottom edge of the dish.