Two nRF's on one antenna?

Hello,

I think about connecting two central devices (nRF's 52840) using one common antenna. One device will be only RX and will scan for a advertisements, second will manage multiple connected perypherials. Is it possible to both devices use only one external antenna? Do I have stop scanning, when the second device is going to communicate with peripherials? I don't want devices to collide with themselves.

Thank you.