Antenna type identification

[sadboi]

Does anyone know what this type of antenna (attached) is called? It is used for multiband GNSS. Thanks.

[miniant]

I think it's about a crossed dipole antenna

[sadboi]

Interesting, I didn't realise you could combine 2 dipoles perpendicularly like this. Thanks a lot!

[shadow.dark]

Is this a serious product or just made in China? Because based on the pictures，it doesn't look well built，like something crudely made. The input feed appears to be some sort of balun. But I still don't understand the purpose of those wide copper foils around the perimeter.
Crossed dipole antennas are generally used to receive circularly polarized waves, or linearly polarized waves of unknown direction. This is in line with the GNSS application scenario. The upward arching state may be to maximize the use of space inside the enclosure.

[ch_scr]

It seems to be fed by two coaxial cables. How they are combined is a different mystery. Maybe a transmission line quadrature hybrid?
This type might be called "crossed dipole" or "turnstile antenna". The L-shaped areas along the side of the dipole elements remain mysterious.
Maybe they optimize the radiation pattern or polarization (linear / other circular rejection?).