Contents
What are the two types of antenna?
Antenna Theory – Types of Antennas
| Type of antenna | Examples |
|---|---|
| Wire Antennas | Dipole antenna, Monopole antenna, Helix antenna, Loop antenna |
| Aperture Antennas | Waveguide (opening), Horn antenna |
| Reflector Antennas | Parabolic reflectors, Corner reflectors |
| Lens Antennas | Convex-plane, Concave-plane, Convex-convex, Concaveconcave lenses |
What are different categories of antenna?
Let us now briefly see about few of these different types of antennas.
- Wire Antennas. One of the most commonly used antennas are wire antennas.
- Short Dipole Antenna. Perhaps the simplest of all antennas is the Short Dipole Antenna.
- Dipole Antenna.
- Loop Antenna.
- Monopole Antenna.
- Aperture Antennas.
- Slot Antenna.
- Horn Antenna.
Why is it called antenna?
The Latin word antenna meant “sail yard,” which is the long spar that supports and spreads the sail on a sailing vessel. In a Latin translation of Aristotle’s work made during the Renaissance, the word antennae was used for Greek keraiai. In English we still use antennae for insects’ feelers.
Are there different types of antennas for different devices?
The shape, size and type of antenna might be different but there is an antenna involved none the less. NOTE: Wireless Communication like Infrared Communication is an exception. For example, consider the two of the most important devices in our life: A Mobile Phone and a Television (or simply T.V.).
What’s the difference between an antenna and a cable?
Wireless communication is the only feasible option and Antennas are the gateway for that. There are many situations or applications where cables are preferred over wireless communication with antennas (like high speed ethernet or the connection between gaming console and the T.V., for example).
How are half wave antennas different from dipole antennas?
The radiation pattern above the grounded plane will be same as the half wave dipole antenna, however, the total power radiated is half that of a dipole; the field gets radiated only in the upper hemisphere region. The directivity of these antennas become double compared to the dipole antennas.
Which is an example of a directional antenna?
Directional antennas are usually mounted on walls and have their radiation patterns focused in a certain direction. This is similar to the earlier example of a flashlight (see the section “Common Antenna Types”). The goal is to provide coverage for areas such as long hallways, a warehouse, or anywhere you need a more directed signal.