DIFF Subgroup
H01Q 9/18 Vertical disposition of the antenna
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
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 > Vertical disposition of the antenna
CPC:
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 (H01Q9/44 takes precedence) > Vertical disposition of the antenna
No child classifications to compare. This is a leaf node in both IPC and CPC.