Your sanity will not turn up in search results.. my apologies .
"Site is best expierienced on PC" ~PC Overlords
What is an Antenna ?
Simply put, an antenna is a device that converts electrical signals into electromagnetic waves on the transmitter end and then on the receiver end helps to receive and translate those electromagnetic waves back into electrical signals ,Antenna can be passive or active with the active containing some sort of amplification
​
​
​
Wire Antennas
One of the most commonly used antennas are wire antennas. They can be found in vehicles (automobiles), ships, aircrafts, buildings etc. Wire Antennas come in different shapes and sizes like straight wire (Dipole), Loop and Helix.
​
Short Dipole Antenna
Perhaps the simplest of all antennas is the Short Dipole Antenna. It is a special case of the Dipole antenna.
In its simplest form, it is basically an open circuit wire with the signal being fed at the centre. The term “short” in short dipole antenna doesn’t directly refer to its size but rather to the size of the wire relative to the wavelength of the signal.
For a typical Short Dipole Antenna, the length of the wire les less than the tenth of the wavelength of the frequency of operation.
​
Dipole Antenna
A Dipole Antenna is made up two conductors in the same axis and the length of the wire need to be small compared to the wavelength.
Loop Antenna
A Loop antenna is formed by a single or multiple turn of wire forming a loop. The radiation produced by loop antenna is comparable to a short dipole antenna.
​
Monopole Antenna
A special case of Dipole antenna is the monopole antenna i.e. it is half of the dipole antenna.
Aperture Antennas
A class of directional antennas, Aperture Antennas have an opening in the surface. Usually, aperture antenna consists of Dipole or Loop Antenna in a guiding structure with an opening to emit radio waves.
Slot Antenna
A type of aperture antenna which contains one or more slots cut on the surface of the waveguide. They are usually used in microwave frequencies and have an omnidirectional radiation pattern.
Horn Antenna
One of the most popular antennas is the Horn Antenna, which effects the transition between transmission line and wave propagating in free space. It acts as a natural extension to a waveguide.