DIFF Subgroup
H01Q 15/23 Combinations of reflecting surfaces with refracting or diffracting devices
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices > Combinations of reflecting surfaces with refracting or diffracting devices
CPC:
Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices (variable for purpose of altering directivity H01Q3/00; arrangements of such devices for guiding waves H01P3/20; variable for purpose of modulation H03C7/02) > Combinations of reflecting surfaces with refracting or diffracting devices
No child classifications to compare. This is a leaf node in both IPC and CPC.