Microwave relay dish and a view of the landscape on Milešovka hill (837 m), České středohoří, Czech Republic. Microwave relay links like this relay telephone calls and television signals between nearby cities.    This type of <a href="https://en.wikipedia.org/wiki/parabolic_antenna" class="extiw" title="wikipedia:parabolic antenna">parabolic antenna</a> is called a "shrouded dish".  The cylindrical metal shroud attached to the rim of the dish shields it from interference from microwaves coming from other directions, allowing nearby dishes to use the same microwave frequencies.
<a href="//commons.wikimedia.org/wiki/User:Juan_de_Vojn%C3%ADkov" class="mw-redirect" title="User:Juan de Vojníkov">Juan de Vojníkov</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>