Reflecting surfaces; Equivalent structures

Introduced: September 1968

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 > Reflecting surfaces; Equivalent structures

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) > Reflecting surfaces; Equivalent structures

CPC subdivides this area 2x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

Child Classifications

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H01Q 15/141 +1 CPC CPC only CPC only
H01Q 15/145 CPC only CPC only
H01Q 15/147 CPC only CPC only
H01Q 15/148 CPC only CPC only
H01Q 15/16 curved in two dimensions [2D], e.g. paraboloidal +3 CPC IPC+CPC Available in IPC and CPC
H01Q 15/18 comprising plurality of mutually inclined plane surfaces, e.g. corner reflector IPC+CPC Available in IPC and CPC
H01Q 15/22 functioning also as polarisation filter IPC+CPC Available in IPC and CPC