Kreco Discone

Low SWR Over 8 to 1 Range

Disk and Cone are Fabricated of 12
Radials

Must specify UHF or Type N Female connector.

Frequency Range
D-100A 1" 12 lbs. 100 to 800 MHz
D-150A 1"  4 lbs. 150 to 1200 MHz
D-300A 1"  4 lbs. 300 to 2400 MHz 

Source:

http://www.krecoantennas.com/broadband.htm