Sparks31 has a brief article up on Covert and Hidden Antennas.
Whether you are setting up a field radio station for communications or a monitoring post for SIGINT operation, the antenna is the linchpin of your setup. The best radio in the world is useless without a decent antenna.
Let’s take a look at a common antenna design, one I’ve used with much success over the years:
This is a discone antenna. I have one at my eastern QTH. For a first antenna it’s not bad. It makes an adequate wideband receive and transmit antenna for the VHF and UHF bands. It’s a unity gain antenna, but its advantage is that you can get on the air with multiple VHF and UHF bands with a single antenna. For permissive urban and suburban environments it’s a good choice.
However, it sticks out like a cow in church. Anyone with a modicum of RF knowledge will know what you’re doing when they see one on your roof. Not a problem in permissive environments like the U.S. today, unless you live in place that has a H.O.A. which restricts antennas, or for whatever reason(s) you want to keep your RF activity under wraps.
Antennas are one of those things that you can easily roll your own out of whatever stuff you have lying around your workshop, homestead, or wherever.