Discone antenna
The discone antenna (made up of 'disc' and 'cone') is a broadband omnidirectional antenna .
A discone antenna is coupled asymmetrically via a coaxial cable. In the basic diagram, the coaxial cable is arranged centrally and feeds in in the middle of the upper disc. This antenna design offers a frequency-independent impedance that only depends on the angle Θ of the cone. In the technical implementation, however, the maximum dimensions of the cone and disk limit the limit frequencies.
The radiation angle is very flat, the polarization runs in the vertical direction. The antenna gain of discone antennas is 3 dBi to 4 dBi.
Use and use
Due to their broadband nature, discone antennas are well suited for radio monitoring tasks and simultaneous use on several frequency bands, e.g. B. 2-m - / 70-cm - / 23-cm - amateur radio bands . For example, the discone broadband station antenna AH-8000 from ICOM offers a usable frequency range from 100 MHz to 3300 MHz.
literature
- Gerd Klawitter: Antenna advisor receiving antennas for all wave ranges. 6th edition, Verlag für Technik und Handwerk, Baden-Baden 2005, ISBN 3-88180-613-X
