If you are not familiar with this type of antenna, don't feel bad. It is not one of your more popular HF or even VHF radiators It is widely used as a base antenna for emergency services (police fire, ambulance). It's primary claim to fame is it's very broadband performance. A discone designed to cover 144 mhz can work equally well up through 1296 mhz. Feedpoint impedance is 50 ohms unbalanced. Ideal for 50 ohm coax or hardline. It is vertically polarized, omnidirectional, and can best be compared to an extremely broadband ground plane antenna. Not much good for UHF DXing, but it makes a dynamite scanner antenna
