0
\$\begingroup\$

In a phased array system, what will have to change in a receiver's architecture if it needs to work for both linear and circular polarization?

I saw in one article it is said "Supports automatic circular polarization control by embedding 0o/90o phase controllable phase shifters" source:(http://www.satixfy.com/beat/)

Can anyone please explain me why they used the phase shifter?

\$\endgroup\$
0
\$\begingroup\$

Nothing systematic. The array elements need to be able to pick up the circular polarization, but the antenna gain comes from the phase difference, which doesn't care about polarization.

\$\endgroup\$
  • 2
    \$\begingroup\$ I am sorry but I could not get the idea why they needed the phase shifter and mentioned it that it is for circular polarization, Can u please elaborate a little, may be it is a basic concept but i am really struggling to grasp it \$\endgroup\$ – Rumman Ahmed Feb 28 '19 at 22:48
  • \$\begingroup\$ The phase shifting is for the two linear polarizations of the individual antennas. You can use two cross-polarized linear antennas with the same phase center, and link them with a phase shift and get a circularly polarized antenna. That applies to the individual antennas, but has nothing to do with the fact you might be using these antennas in an array. \$\endgroup\$ – Marcus Müller Mar 1 '19 at 7:26

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.