Pi Zero W 1.1 - What kind of component is this? What does it do?

Question

Unfortunately a component (see image, component is encircled in red) is broken/missing on my Pi Zero W 1.1.

So far everything still seems to work, but anyway:

• Do you know what kind of component this is (to be able to replace it)?

• Do you know what it does (to decide, if it needs replacing)?

Update: Here is a high-resolution image of the relevant part (a capacitor belonging to the antenna):

Thanks in advance

Answer 1

This is a capacitor. It is required for the WiFi/Bluetooth antenna to work reliably.
It might still work without one of those but in general you should experience a degraded range and/or performance.