# What is cross polarization in satellite communication?

## What is cross polarization in satellite communication?

Cross polarization discrimination (XPD) indicates the isolation between the two communication channel with orthogonal polarization (Barclay, 2003) and may be used to measure the effect of depolarisation interference.

What is cross pol and Co pol?

Co-polar means when the polarization of both the transmitting (test antenna) and receiving antenna (reference horn antenna) is the same and cross polarization means when the polarization of both the antennas are different.

### What is cpi test vsat?

The satellite operator will normally require you to rotate the RF feed horn to achieve at least 30dB of isolation during the commissioning process, this test is called CPI (Cross Polarisation Isolation). The satellite operator will be looking at both pols on a spectrum analyser and measuring the max isolation.

What is cross pole isolation?

Cross polar isolation strictly refers to the amount of power coupled between two orthogonally polarised ports of a dual polarised antenna. Cross polar discrimination (XPD) is a measure of how polar an antenna element is and instead used measure the rejection of an orthogonally polarised transmission.

## What is the meaning of cross polarization in antenna theory?

Cross Polarization. Antenna Theory Home. Cross polarization (sometimes written X-pol, in antenna slang) is the polarization orthogonal to the polarization being discussed. For instance, if the fields from an antenna are meant to be horizontally polarized, the cross-polarization in this case is vertical polarization.

How big of a satellite pole do I Need?

The 4ft x 2in satellite pole is suitable for dishes up to 1m. The other satellite poles are only suitable for dishes up to 60cm, particularly in exposed locations. Any of our satellite poles are suitable for any aerial (or aerials) under any conditions.

### What is the polarization of a vertical satellite dish?

Horizontal and Vertical Satellite Dish Polarization. Cross-Pol or XPOL is when the transmit and receive RF signals are separated by 90 degrees. So, when the transmit is vertical the receive will be horizontal and vice versa.

What’s the point of pointing an antenna on a satellite?

And, it creates the least possible interference for other users on the satellite (cross-pol). Note: The most important thing to remember is that a properly pointed antenna doesn’t waste bandwidth or interfere with your own or others’ transmissions.