|  | H |
SECTION H — ELECTRICITY

|  | H01 |
BASIC ELECTRIC ELEMENTS

|  | H01 |
Note(s) Processes involving only a single technical art, e.g. drying, coating, for which provision exists elsewhere are classified in the relevant class for that art.

|  | H01P |
WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (aerials Fulltext... Hierarchy... Expanded...H01Q; networks comprising distributed impedances together with lumped impedance elements Fulltext... Hierarchy... Expanded...H03H)

|  | H01P |
Note(s) In this sub-class, the term "waveguide type" as applied to transmission lines includes only high-frequency coaxial cables or Lecher lines, and as applied to resonators, delay lines, or other devices includes all devices having distributed inductance and capacitance.

|  | H01P 1/00 |
Auxiliary devices (coupling devices of the waveguide type Fulltext... Hierarchy... Expanded...H01P 5/00)

|  | H01P 1/02 |
· | Bends; Corners; Twists

|  | H01P 1/04 |
· | Fixed joints

|  | H01P 1/06 |
· | Movable joints, e.g. rotating joints

|  | H01P 1/08 |
· | Dielectric windows

|  | H01P 1/10 |
· | for switching or interrupting

|  | H01P 1/12 |
· · | by mechanical chopper

|  | H01P 1/14 |
· · | by electric discharge devices (discharge devices Fulltext... Hierarchy... Expanded...H01J 17/64)

|  | H01P 1/15 |
· · | by semiconductor devices [2]

|  | H01P 1/16 |
· | for mode selection, e.g. mode suppression promotion; for mode conversion (Fulltext... Hierarchy... Expanded...H01P 3/13 takes precedence; linking dissimilar lines or devices Fulltext... Hierarchy... Expanded...H01P 5/08)

|  | H01P 1/165 |
· | for rotating the plane of polarisation (Fulltext... Hierarchy... Expanded...H01P 1/32 takes precedence) [2]

|  | H01P 1/17 |
· · | for producing a continuously rotating polarisation, e.g. circular polarisation [2]

|  | H01P 1/18 |
· | Phase-shifters (Fulltext... Hierarchy... Expanded...H01P 1/165 takes precedence)

|  | H01P 1/20 |
· | Frequency-selective devices, e.g. filters (resonators Fulltext... Hierarchy... Expanded...H01P 7/00)

|  | H01P 1/22 |
· | Attenuating devices (Fulltext... Hierarchy... Expanded...H01P 1/32 takes precedence; dissipative terminating devices Fulltext... Hierarchy... Expanded...H01P 1/26)

|  | H01P 1/24 |
· | Terminating devices

|  | H01P 1/26 |
· · | Dissipative terminations

|  | H01P 1/28 |
· · | Short-circuiting plungers

|  | H01P 1/30 |
· | for compensation of, or protection against, temperature or moisture effects

|  | H01P 1/32 |
· | Non-reciprocal transmission devices

|  | H01P 1/34 |
· · | using Faraday-effect [2]

|  | H01P 1/36 |
· · · | Isolators [2]

|  | H01P 1/38 |
· · · | Circulators [2]

|  | H01P 1/40 |
· · · | Phase-shifters [2]

|  | H01P 3/00 |
Waveguides; Transmission lines of the waveguide type

|  | H01P 3/02 |
· | with two longitudinal conductors

|  | H01P 3/04 |
· · | Lines formed as Lecher wire pairs

|  | H01P 3/06 |
· · | Coaxial lines (not suitable for handling frequencies considerably beyond the audio range Fulltext... Hierarchy... Expanded...H01B 11/18)

|  | H01P 3/08 |
· · | Microstrips; Strip lines

|  | H01P 3/10 |
· | Wire waveguides, i.e. with a single solid longitudinal conductor

|  | H01P 3/12 |
· | Hollow waveguides (Fulltext... Hierarchy... Expanded...H01P 3/20 takes precedence)

|  | H01P 3/13 |
· · | specially adapted for transmission of the TE01 circular-electric mode [2]

|  | H01P 3/14 |
· · | Flexible

|  | H01P 3/16 |
· | Dielectric waveguides, i.e. without a longitudinal conductor

|  | H01P 3/18 |
· | built-up from several layers to increase operating surface, i.e. alternately conductive and dielectric layers

|  | H01P 3/20 |
· | Quasi-optical arrangements for guiding a wave, e.g. focusing by dielectric lenses (quasi-optical devices per se Fulltext... Hierarchy... Expanded...H01Q 15/00)

|  | H01P 5/00 |
Coupling devices of the waveguide type (non-reciprocal devices Fulltext... Hierarchy... Expanded...H01P 1/32; for introducing or removing wave energy to or from the discharge in transit-time tubes Fulltext... Hierarchy... Expanded...H01J 23/32)

|  | H01P 5/02 |
· | with invariable factor of coupling

|  | H01P 5/04 |
· | with variable factor of coupling

|  | H01P 5/08 |
· | for linking dissimilar lines or devices

|  | H01P 5/10 |
· · | for linking symmetric with asymmetric lines or devices

|  | H01P 5/12 |
· | Junctions of more than two guides, e.g. T- junctions

|  | H01P 5/14 |
( transferred to Fulltext... Hierarchy... Expanded...H01P 5/18 )

|  | H01P 5/16 |
· · | of the hybrid type [2]

|  | H01P 5/18 |
· · · | Directional couplers [2]

|  | H01P 5/20 |
· · · | Magic-T junctions [2]

|  | H01P 5/22 |
· · · | Ring hybrid junctions [2]

|  | H01P 7/00 |
Resonators of the waveguide type (structurally associated with transit-time tubes and interacting with the discharge therein Fulltext... Hierarchy... Expanded...H01J 23/18)

|  | H01P 7/02 |
· | Lecher resonators

|  | H01P 7/04 |
· | Coaxial resonators

|  | H01P 7/06 |
· | Cavity resonators

|  | H01P 9/00 |
Delay lines of the waveguide type (structurally associated with transit-time tubes and interacting with the discharge therein Fulltext... Hierarchy... Expanded...H01J 23/24)

|  | H01P 9/02 |
· | Helical lines

|  | H01P 9/04 |
· | Interdigital lines

|  | H01P 11/00 |
Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type (manufacture of coaxial cables Fulltext... Hierarchy... Expanded...H01B 13/00)