Whats the main disadvantage of crosspolarization?

[markus]

Crosspolarization

Hello!

I'm wondering what's the main disadvantage of crosspolarization? Will it cause lose in transmitted or recieved power and how does this depend on crosspolarization?

Thanks for advance,
Markus

 

[flatulent]

Re: Crosspolarization

This condition will reduce the signal received by about 20 dB in most cases. This effect is used to advantage in some systems. For instance in point to point microwave links there can be two completely independent signals on each of the polarizations. This will double the transmission capability.

 

[sergio mariotti]

Re: Crosspolarization

From the communication pont of view, the answer of flatulent is exaustive.
But from antenna theory point of view, To obtain nearly perfect pencil lobe, a very low xpol. is a must.
As the Co.pol is got dirty by Xpol, as the main beam became deformed.

 

[ning0703]

Crosspolarization

it will affect the mainradiation and make energy loss

 

[toonafishy]

Re: Crosspolarization

It is used successfully in satellite communications. You have two signals at the same frequency, one is right hand circular polarized and the other is left hand circular polarized. The receiver antenna is able to seperate the two signals with about 25 dB of isolation.