Q: Did you hear about the two antennas who got married?
A: The wedding was awful but the reception was great!
If you have good reception it means that you can hear the radio really well, or see the TV really well. Radio waves are also used to send voice and texts to cell towers, so good reception is important for cell phones too.
Another meaning of reception is the the party after a wedding.
This joke is funny because it plays with the meaning of the word reception: the party after a wedding or the way an antenna captures waves. Of course the wedding reception of of two antennas would be great!
If you want to try making a radio with an antenna, take a look at this video: