Inside Wireless: Antenna Polarization

In this episode you will learn about antenna polarization - what it is, how it works, why is it important, and what polarization is typical for WISP antennas.

One the important parameters of antennas is polarization. It is a natural property of any antenna. Polarization says in which plane the the fields of the transmitted signal are changing. Polarization is decided by the antenna designer that determines the EM fields orientation.

Most commonly, antennas have linear polarization, that means that the fields of the transmitted signal are changing in a line. Vast majority of antennas for WISP networks are linearly polarized.

Horizontal and Vertical polarizations are typical linear polarizations. Some antennas have slant or dual slant polarization. This means the fields are changing in plane rotated most commonly by 45 degrees compared to H or V polarization.

To achieve the best results antenna polarization must match. Horizontally polarized antenna communicates perfectly with equally polarized antenna on the other end of the link. As the rotation angle between antennas increases, the level of received signal decreases because of the physics of EM waves. This is why orthogonal polarization provides the isolation and creates additional communication channel.

In the real world, isolation between H and V polarizations is not perfect. Antennas with two polarizations have a parameter called cross-polarization isolation which tell us how well the H polarized antenna system and V polarized antenna system are separated. The bigger the isolation the better!

0:00 Intro
0:22 H, V, Slant polarization
0:48 Polarization in practice

#RFelements #InsideWireless #AntennaPolarization #HorizontalPolarization #VerticalPolarization #Antennas #AntennaTheory #WISP #SaveSpectrum #RejectNoise #growsmart #UbiquitiNetworks #CambiumNetworks #MimosaNetworks #Mikrotik

[Rfelements]

Any topic you're interested in and didn't find it among our videos? Let us know in the comments

[randyvogel]

THANK YOU SO MUCH FOR THIS VIDEO! I was having a hard time understanding this concept but your explanation was perfect! I love the format and short run times you guys use. Keep up the good work!

[zanastumasonis]

clear and straight to the point.. thanks!!!

[adamwhite]

With an indoor aerial (flat panel). Will that need to be turned on it’s side if it’s a vertically polarised transmitter?

[hasibuddin]

Sir if the video will in range of 8-10 minute range..it wuld be more informative and helpful..thakn u😊😊😊

[ZenoDiac]

I love these. Short and sweet, thanks

[kitekiev]

wiki say "conical horn = circle polarization" Do you really provide dual linear X-polarization in your conical-horn antennas?

[leonardduzon]

is Dual polarized antenna has great advantage to the one polarized antenna?

[aldoruiz]

Muy buena información, gracias por compartir

[hopolo]

0:47 hah mispronunciation of "linearly" said as "linner-early".

[megamachine]

these videos are really great, but i feel like it goes way too fast. i need time to sink in what im seeing before you move on

[TriPham-xdwk]

The problem with antenae designed was the jamming make it nolonger the Western domination because sound, noise, vibration make it extremely difficult to keep signal integrity and so architecture of new type of antenna was about passive and active depending on the need. Passive antenae tend to be extreme efficient because no one can detect it's location for all it does is use the electricity power grid and create EMF refector mirrors that can encode ambient sunlight and or dominant signal then amplify it be EMF and so there is no transmission detect until they are active mode

[gireeshkumarkancharla]

The intro music remainds me the MASTER (Vijay's movie)