IPC 7 English version H01P !A-H01P 11/00

H01P-H01P01100

SECTION H – ELECTRICITY

H 01

BASIC ELECTRIC ELEMENTS

H 01 P

WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B; aerials H01Q; networks comprising lumped impedance elements H03H)

Note

In this subclass, the following expression is used with the meaning indicated:

–

"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.

Subclass Index

WAVEGUIDES, TRANSMISSION LINES

H01P 3/00

DEVICES OF THE WAVEGUIDE TYPE

Auxiliary devices; coupling devices; resonators; delay lines

H01P 1/00; H01P 5/00; H01P 7/00; H01P 9/00

MANUFACTURE

H01P 11/00

Auxiliary devices (coupling devices of the waveguide type H01P 5/00)

Bends; Corners; Twists

Fixed joints (line connectors H01R; cable fittings H02G 15/00)

Movable joints, e.g. rotating joints

Dielectric windows (coupling devices for transit-time tubes H01J 23/36)

for switching or interrupting

by ferromagnetic devices [3]

by mechanical chopper

by electric discharge devices (discharge devices H01J 17/64)

by semiconductor devices [2]

for mode selection, e.g. mode suppression or mode promotion; for mode conversion (linking dissimilar lines or devices H01P 5/08) [3]

161

sustaining two independent orthogonal modes, e.g. orthomode transducer [3]

162

absorbing spurious or unwanted modes of propagation [3]

163

specifically adapted for selection or promotion of the TE₀₁ circular-electric mode [3]

165

for rotating the plane of polarisation [2]

for producing a continuously rotating polarisation, e.g. circular polarisation [2]

175

using Faraday rotators [3]

Phase-shifters (H01P 1/165 takes precedence; coupling devices with variable coupling factor H01P 5/04) [2]

185

using a diode or a gas filled discharge tube [3]

using a ferromagnetic device [3]

195

having a toroidal shape [3]

Frequency-selective devices, e.g. filters (resonators H01P 7/00)

201

Filters for transverse electromagnetic waves (H01P 1/212, H01P 1/213, H01P 1/215, H01P 1/219 take precedence) [3]

202

Coaxial filters (cascaded coaxial cavities H01P 1/205) [3]

203

Strip line filters [3]

205

Comb or interdigital filters; Cascaded coaxial cavities (H01P 1/203 takes precedence) [3]

207

Hollow waveguide filters (H01P 1/212, H01P 1/213, H01P 1/215, H01P 1/219 take precedence) [3]

208

Cascaded cavities; Cascaded resonators inside a hollow waveguide structure (H01P 1/205 takes precedence) [3]

209

comprising one or more branching arms or cavities wholly outside the main waveguide [3]

211

Waffle-iron filters; Corrugated structures [3]

212

suppressing or attenuating harmonic frequencies (H01P 1/215 takes precedence) [3]

213

combining or separating two or more different frequencies (H01P 1/215 takes precedence) [3]

215

using ferromagnetic material [3]

217

the ferromagnetic material acting as a tuning element in resonators [3]

218

the ferromagnetic material acting as a frequency selective coupling element, e.g. YIG-filters [3]

219

Evanescent mode filters [3]

Attenuating devices (dissipative terminating devices H01P 1/26)

using ferromagnetic material [3]

Terminating devices

Dissipative terminations

Short-circuiting plungers (coupling devices with variable coupling factor H01P 5/04)

for compensation of, or protection against, temperature or moisture effects

Non-reciprocal transmission devices (H01P 1/02 to H01P 1/30 take precedence) [3]

Isolators [2,3]

365

Resonance absorption isolators [3]

Field displacement isolators [3]

375

using Faraday rotators [3]

Circulators [2,3]

383

Junction circulators, e.g. Y-circulators [3]

387

Strip line circulators [3]

Hollow waveguide circulators [3]

393

using Faraday rotators [3]

397

using non-reciprocal phase shifters (H01P 1/393 takes precedence) [3]

Waveguides; Transmission lines of the waveguide type

with two longitudinal conductors

Lines formed as Lecher wire pairs

Coaxial lines (not suitable for handling frequencies considerably beyond the audio range H01B 11/18)

Microstrips; Strip lines

Wire waveguides, i.e. with a single solid longitudinal conductor

Hollow waveguides (H01P 3/20 takes precedence)

123

with a complex or stepped cross-section, e.g. ridged or grooved waveguides (H01P 3/14 takes precedence) [3]

127

with a circular, elliptic, or parabolic cross-section [3]

specially adapted for transmission of the TE₀₁ circular-electric mode [2]

flexible

Dielectric waveguides, i.e. without a longitudinal conductor

built-up from several layers to increase operating surface, i.e. alternately conductive and dielectric layers

Quasi-optical arrangements for guiding a wave, e.g. focusing by dielectric lenses (quasi-optical devices in general H01Q 15/00)

Coupling devices of the waveguide type (non-reciprocal devices H01P 1/32; for introducing or removing wave energy to or from the discharge in transit-time tubes H01J 23/36)

with invariable factor of coupling (H01P 5/12 takes precedence) [3]

with variable factor of coupling

for linking dissimilar lines or devices (H01P 1/16, H01P 5/04 take precedence; linking lines of the same kind but with different dimensions H01P 5/02) [3]

for coupling balanced with unbalanced lines or devices

103

Hollow-waveguide/coaxial-line transitions [3]

107

Hollow-waveguide/strip-line transitions [3]

Coupling devices having more than two ports (H01P 5/04 takes precedence) [3]

Conjugate devices, i.e. devices having at least one port decoupled from one other port [2]

consisting of two coupled guides, e.g. directional couplers [2]

of the junction type [3]

Magic-T junctions [2,3]

Hybrid ring junctions [2,3]

Resonators of the waveguide type (structurally associated with transit-time tubes and interacting with the discharge therein H01J 23/18; microwave heating devices H05B 6/64)

Lecher resonators

Coaxial resonators

Cavity resonators

Strip line resonators [3]

Dielectric resonators [3]

Delay lines of the waveguide type (structurally associated with transit-time tubes and interacting with the discharge therein H01J 23/24)

Helical lines

Interdigital lines

11/

Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type (manufacture of coaxial cables H01B 13/00)