IPC Classification

Class code (prefix) Descriptions Number of results
H01P 1/00 Auxiliary devices
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 Auxiliary devices for switching or interrupting
H01P 1/11 Auxiliary devices for switching or interrupting by ferromagnetic devices
H01P 1/12 Auxiliary devices for switching or interrupting by mechanical chopper
H01P 1/14 Auxiliary devices for switching or interrupting by electric discharge devices
H01P 1/15 Auxiliary devices for switching or interrupting by semiconductor devices
H01P 1/16 Auxiliary devices for mode conversion
H01P 1/17 Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation
H01P 1/18 Phase-shifters
H01P 1/19 Phase-shifters using a ferromagnetic device
H01P 1/20 Frequency-selective devices, e.g. filters
H01P 1/22 Attenuating devices
H01P 1/23 Attenuating devices using ferromagnetic material
H01P 1/24 Terminating devices
H01P 1/26 Dissipative terminations
H01P 1/28 Short-circuiting plungers
H01P 1/30 Auxiliary devices for compensation of, or protection against, temperature or moisture effects
H01P 1/32 Non-reciprocal transmission devices
H01P 1/36 Isolators
H01P 1/37 Field displacement isolators
H01P 1/38 Circulators
H01P 1/39 Hollow waveguide circulators
H01P 1/161 Auxiliary devices for mode conversion sustaining two independent orthogonal modes, e.g. orthomode transducer
H01P 1/162 Auxiliary devices for mode conversion absorbing spurious or unwanted modes of propagation
H01P 1/163 Auxiliary devices for mode conversion specifically adapted for selection or promotion of the TE01 circular-electric mode
H01P 1/165 Auxiliary devices for rotating the plane of polarisation
H01P 1/175 Auxiliary devices for rotating the plane of polarisation using Faraday rotators
H01P 1/185 Phase-shifters using a diode or a gas filled discharge tube
H01P 1/195 Phase-shifters using a ferromagnetic device having a toroidal shape
H01P 1/201 Filters for transverse electromagnetic waves
H01P 1/202 Coaxial filters
H01P 1/203 Strip line filters
H01P 1/205 Comb or interdigital filters; Cascaded coaxial cavities
H01P 1/207 Hollow waveguide filters
H01P 1/208 Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
H01P 1/209 Hollow waveguide filters comprising one or more branching arms or cavities wholly outside the main waveguide
H01P 1/211 Waffle-iron filters; Corrugated structures
H01P 1/212 Frequency-selective devices, e.g. filters suppressing or attenuating harmonic frequencies
H01P 1/213 Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
H01P 1/215 Frequency-selective devices, e.g. filters using ferromagnetic material
H01P 1/217 Frequency-selective devices, e.g. filters using ferromagnetic material the ferromagnetic material acting as a tuning element in resonators
H01P 1/218 Frequency-selective devices, e.g. filters using ferromagnetic material the ferromagnetic material acting as a frequency selective coupling element, e.g. YIG-filters
H01P 1/219 Evanescent mode filters
H01P 1/365 Resonance absorption isolators
H01P 1/375 Isolators using Faraday rotators
H01P 1/383 Junction circulators, e.g. Y-circulators
H01P 1/387 Strip line circulators
H01P 1/393 Circulators using Faraday rotators
H01P 1/397 Circulators using non-reciprocal phase shifters
H01P 3/00 Waveguides; Transmission lines of the waveguide type
H01P 3/02 Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
H01P 3/04 Lines formed as Lecher wire pairs
H01P 3/06 Coaxial lines
H01P 3/08 Microstrips; Strip lines
H01P 3/10 Wire waveguides, i.e. with a single solid longitudinal conductor
H01P 3/12 Hollow waveguides
H01P 3/13 Hollow waveguides specially adapted for transmission of the TE01 circular-electric mode
H01P 3/14 Hollow waveguides flexible
H01P 3/16 Dielectric waveguides, i.e. without a longitudinal conductor
H01P 3/18 Waveguides; Transmission lines of the waveguide type 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
H01P 3/123 Hollow waveguides with a complex or stepped cross-section, e.g. ridged or grooved waveguides
H01P 3/127 Hollow waveguides with a circular, elliptic, or parabolic cross-section
H01P 5/00 Coupling devices of the waveguide type
H01P 5/02 Coupling devices of the waveguide type with invariable factor of coupling
H01P 5/04 Coupling devices of the waveguide type with variable factor of coupling
H01P 5/08 Coupling devices of the waveguide type for linking lines or devices of different kinds
H01P 5/10 Coupling devices of the waveguide type for linking lines or devices of different kinds for coupling balanced with unbalanced lines or devices
H01P 5/12 Coupling devices having more than two ports
H01P 5/16 Conjugate devices, i.e. devices having at least one port decoupled from one other port
H01P 5/18 Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
H01P 5/19 Conjugate devices, i.e. devices having at least one port decoupled from one other port of the junction type
H01P 5/20 Magic-T junctions
H01P 5/22 Hybrid ring junctions
H01P 5/103 Hollow-waveguide/coaxial-line transitions
H01P 5/107 Hollow-waveguide/strip-line transitions
H01P 7/00 Resonators of the waveguide type
H01P 7/02 Lecher resonators
H01P 7/04 Coaxial resonators
H01P 7/06 Cavity resonators
H01P 7/08 Strip line resonators
H01P 7/10 Dielectric resonators
H01P 9/00 Delay lines of the waveguide type
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