IPC Subgroup
H01Q 9/27 Spiral antennas
Introduced: January 1980
Last revised: January 2006
Full Title
Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements > Resonant antennas > with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole > with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength > Spiral antennas
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ANTENNAS, i.e. RADIO AERIALS