One of my newest Elmerees is now intensely interested in antenna making. He’s making a series of J-poles and dipoles and who knows what else. On Saturday, down at the museum, we got into a discussion about the different types of materials he could use to build antennas. I repeated to him the old chestnut, “The larger the diameter of the material uses to make the antenna, the wider the bandwidth will be.”
Now, I’m not sure exactly where this bit of advice comes from and what the theory is behind it. Can anyone point me towards a discussion of why this is so?
After having said all this, I got an e-mail from my Elmeree this afternoon. He asked, “So, which is better for a vertical antenna, a solid rod or a tube?”
My answer, “Whichever material you have on hand or whichever is cheaper.”