What Is an Antenna? How does an Antenna work? What types of Antennas exist? In this video, you'll find Antenna theory explained the easiest way possible. A wireless link cannot work without antennas. Everywhere you look, antennas are ubiquitous whether you are aware of it or not.
Antenna is an interface between an RF wave travelling inside a cable and flying through the air - it literally transforms the RF signal from physical medium to air-born. Antenna receives and transmits the electromagnetic waves equally, in other words it is reciprocal.
The most basic antenna type is a wire dipole, which is a resonant antenna. Resonance is a physical phenomenon that occurs when the dipole length is equal to half of the signal wavelength. When it is at resonance, it radiates the signal into free space.
More on resonant antennas: [ Ссылка ]
Aperture antennas are more intuitive to understand - they radiate the EM wave through an opening. For example, horn antenna is an aperture antenna - the wave travelling in the waveguide is radiated through the correct size and shape of a horn antenna, which can be seen as gradual widening of a waveguide mouth.
Visit [ Ссылка ] to find out more about RF elements Antennas technology and how it saves RF spectrum.
0:00 intro
0:24 EM waves properties
0:50 How resonant antenna works
1:22 How aperture antenna works
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Inside Wireless: What Is An Antenna
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