| 1/00 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) |
| 1/02 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) Bends; Corners; Twists |
| 1/04 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) Fixed joints |
| 1/06 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) Movable joints, e.g. rotating joints |
| 1/08 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) Dielectric windows |
| 1/10 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) for switching or interrupting |
| 1/11 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) for switching or interrupting by ferromagnetic devices |
| 1/12 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) for switching or interrupting by mechanical chopper |
| 1/14 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) for switching or interrupting by electric discharge devices (discharge devices H01J 17/64) |
| 1/15 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) for switching or interrupting by semiconductor devices |
| 1/16 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) for mode selection, e.g. mode suppression or mode promotion; for mode conversion |
| 1/161 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) for mode selection, e.g. mode suppression or mode promotion; for mode conversion sustaining two independent orthogonal modes, e.g. orthomode transducer |
| 1/162 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) for mode selection, e.g. mode suppression or mode promotion; for mode conversion absorbing spurious or unwanted modes of propagation |
| 1/163 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) for mode selection, e.g. mode suppression or mode promotion; for mode conversion specifically adapted for selection or promotion of the TE01 circular-electric mode |
| 1/165 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) for rotating the plane of polarisation |
| 1/17 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation |
| 1/175 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) for rotating the plane of polarisation using Faraday rotators |
| 1/18 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) Phase-shifters (H01P 1/165 takes precedence) |
| 1/185 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) Phase-shifters (H01P 1/165 takes precedence) using a diode or a gas filled discharge tube |
| 1/19 | Auxiliary devices (coupling devices of the waveguide type H01P 5/00) Phase-shifters (H01P 1/165 takes precedence) using a ferromagnetic device |