IPC Definitions - January 01, 2012
H01P - Definition
This subclass covers:
Passive devices which have electrical dimensions comparable with the working wavelength, and which operate at frequencies up to but not including optical frequencies, e.g. microwave, and their manufacture.
Auxiliary devices of waveguide type such as filters, phase shifters, non-reciprocal devices, polarisation rotators.
Tubular waveguides and transmission lines such as strip lines, microstrips, coaxial lines, dielectric waveguides.
Devices for coupling between waveguides, transmission lines or waveguide type devices.
Resonators of the waveguide type.
Delay lines of the waveguide type.
Apparatus or processes specially adapted for manufacturing waveguides, transmission lines, or waveguide type devices.
Relationship between large subject matter areas
Waveguides and waveguide type devices are commonly associated with antennas and aerials, these are classified in H01Q.
H01P is concerned with individual circuit components, or basic combinations of them. More complicated networks with lumped impedance elements are classified in H03H.
References relevant to classification in this subclass
This subclass does not cover:
Devices operating at optical frequencies | G02B |
Attention is drawn to the following places, which may be of interest for search:
Networks comprising lumped impedance elements | H03H |
Coaxial cables | H01B 11/18 |
Line connectors | H01R |
Cable fittings | H02G 15/00 |
Quasi-optical devices | H01Q 15/00 |
Aerials | H01Q |
Transit-time tubes | H01J 23/00 |
In this subclass, the following terms or expressions are used with the meaning indicated:
Auxiliary devices | Devices which perform an operation other than the mere simple transmission of energy. |
Waveguide type | As applied to transmission lines, this term includes only high-frequency coaxial cables or Lecher lines, and as applied to resonators, delay lines, or other devices, this term includes all devices having distributed inductance and capacitance. |
In patent documents the following abbreviations are often used:
Non-reciprocal devices | Components such as circulators or isolators, using the propagation properties of ferrites. |