question about patch antenna

Dual-polarization mode can be generated by a single patch which is acted as polarization diversity antennas.
while designing circular polarization diversity antenna, can it also employing one single patch to received RHCP and LHCP waves respectively with good isolation?

Is there some other type of design (except patch antenna) that can integral one RHCP and one LHCP antenna into a single compact element just like dual-polarization antenna?

thanks a lot