If you have a rooftop antenna, it probably has steel, aluminum, and plastic. Your indoor antenna might have all three, too. Why are there so many different materials used in antenna manufacture, and which is the one you just can’t live without?
Spoiler alert: aluminum.
I could tease you and make you get all the way to the bottom of the article, but I won’t. Aluminum is the key material in most antennas. Why? It’s a great combination of the factors you need for an antenna. I went into deep detail in this article, but here’s the short version It is more conductive than steel, more corrosion-resistant than copper, and cheaper than gold. Look at this list of the most conductive metals:
Silver
Copper
Annealed copper
Gold
Aluminium...