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.

 H01Q
AERIALS (microwave radiators for near-field therapeutic treatment A61N 5/04; apparatus for testing aerials or for measuring aerial characteristics G01R; waveguides H01P; radiators or aerials for microwave heating H05B 6/72)
 H01Q

Note(s)

  1. In addition to the primary active radiating elements, this sub-class includes (a) secondary devices for absorbing or for modifying the direction or polarisation of waves radiated from aerials, and (b) combinations with auxiliary devices such as earthing switches, lead-in devices, and lightning protectors.
  2. Devices of the waveguide type, such as resonators or lines, not designed as radiating elements are classified in sub-class H01P.
  3. This sub-class covers both transmitting and receiving aerials, and the use of terminology such as "active radiating element" is to be understood as covering corresponding parts of a receiving aerial. [3]
 H01Q 1/00
Details of, or arrangements associated with, aerials (arrangements for varying orientation of directional pattern H01Q 3/00)
 H01Q 1/00

Note(s)

This group includes only (a) structural details or features of aerials not dependent on electric operation, and (b) structural details or features applicable to more than one type of aerial or aerial element. Structural details or features described with reference to, or clearly applicable only to, aerials or aerial elements of a particular type are classified in the group appropriate to that type.

 H01Q 1/02
·  Arrangements for de-icing; Arrangements for drying-out
 H01Q 1/04
·  Adaptation for subterranean or subaqueous use
 H01Q 1/06
·  Means for the lighting or illuminating of aerials, e.g. for purpose of warning
 H01Q 1/08
·  Means for collapsing aerials or parts thereof (collapsible loop aerials H01Q 7/02; collapsible H-aerials or Yagi aerials H01Q 19/04)
 H01Q 1/10
·  ·  Telescopic elements
 H01Q 1/12
·  Supports; Mounting means (supporting conductors in general H02G 7/00)
 H01Q 1/14
·  ·  for wire or other non-rigid radiating elements
 H01Q 1/16
·  ·  ·  Strainers, spreaders, or spacers
 H01Q 1/18
·  ·  Means for stabilising aerials on an unstable platform
 H01Q 1/20
·  ·  Resilient mountings
 H01Q 1/22
·  ·  by structural association with other equipment or articles
 H01Q 1/24
·  ·  ·  with receiving set
 H01Q 1/26
·  ·  ·  with electric discharge tube
 H01Q 1/27
·  Adaptation for use in or on movable bodies (H01Q 1/08, H01Q 1/12, H01Q 1/18 take precedence)  [3]
 H01Q 1/28
·  ·  Adaptation for use in or on aircraft, missiles, satellites, or balloons
 H01Q 1/30
·  ·  ·  Means for trailing aerials
 H01Q 1/32
·  ·  Adaptation for use in or on road or rail vehicles (telescopic elements H01Q 1/10; resilient mountings for aerials H01Q 1/20)
 H01Q 1/34
·  ·  Adaptation for use in or on ships, submarines, buoys, or torpedoes (for subaqueous use H01Q 1/04; retractable loop aerials H01Q 7/02)
 H01Q 1/36
·  Structural form of radiating elements, e.g. cone, spiral, umbrella (H01Q 1/08, H01Q 1/14 take precedence)
 H01Q 1/38
·  ·  formed by a conductive layer on an insulating support (conductors in general H01B 5/14)
 H01Q 1/40
·  Radiating elements coated with, or embedded in, protective material
 H01Q 1/42
·  Housings not intimately mechanically associated with radiating elements, e.g. radome
 H01Q 1/44
·  Using equipment having another main function to serve additionally as an aerial (H01Q 1/28-H01Q 1/34 take precedence)
 H01Q 1/46
·  ·  electric supply lines or communication lines
 H01Q 1/48
·  Earthing means; Earth screens; Counterpoises (earthing pins H01R 4/66)
 H01Q 1/50
·  Structural association of aerials with earthing switches, lead-in devices, or lightning protectors (lead-in devices H01B; lightning protectors, switches H01H)
 H01Q 1/52
·  Means for reducing coupling between aerials; Means for reducing coupling between an aerial and another structure (absorbing means H01Q 17/00)
 H01Q 3/00
Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an aerial or aerial system
 H01Q 3/01
·  varying the shape of the aerial or aerial system  [3]
 H01Q 3/02
·  using mechanical movement of aerial or aerial system as a whole
 H01Q 3/04
·  ·  for varying one co-ordinate of the orientation
 H01Q 3/06
·  ·  ·  over a restricted angle
 H01Q 3/08
·  ·  for varying two co-ordinates of the orientation
 H01Q 3/10
·  ·  ·  to produce a conical or spiral scan
 H01Q 3/12
·  using mechanical relative movement between primary active elements and secondary devices of aerials or aerial systems
 H01Q 3/14
·  ·  for varying the relative position of primary active element and a refracting or diffracting device
 H01Q 3/16
·  ·  for varying relative position of primary active element and a reflecting device
 H01Q 3/18
·  ·  ·  wherein the primary active element is movable and the reflecting device is fixed
 H01Q 3/20
·  ·  ·  wherein the primary active element is fixed and the reflecting device is movable
 H01Q 3/22
·  varying the orientation in accordance with variation of frequency of radiated wave
 H01Q 3/24
·  varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
 H01Q 3/26
·  varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture (H01Q 3/22, H01Q 3/24 take precedence)
 H01Q 3/28
·  ·  varying the amplitude  [3]
 H01Q 3/30
·  ·  varying the phase  [3]
 H01Q 3/32
·  ·  ·  by mechanical means  [3]
 H01Q 3/34
·  ·  ·  by electrical means (active lenses or reflecting arrays H01Q 3/46)  [3]
 H01Q 3/36
·  ·  ·  ·  with variable phase-shifters  [3]
 H01Q 3/38
·  ·  ·  ·  ·  the phase-shifters being digital  [3]
 H01Q 3/40
·  ·  ·  ·  with phasing matrix  [3]
 H01Q 3/42
·  ·  ·  ·  using frequency-mixing  [3]
 H01Q 3/44
·  varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element  [3]
 H01Q 3/46
·  ·  Active lenses or reflecting arrays  [3]
 H01Q 5/00
Arrangements for simultaneous operation of aerials on two or more different wavebands (length of elements adjustable H01Q 9/14; combinations of separate active aerial units operating in different wavebands and connected to a common feeder system H01Q 21/30)
 H01Q 5/01
·  Resonant aerials  [3]
 H01Q 5/02
·  ·  for operation of centre-fed aerials which comprise a single, or two or more collinear, substantially straight elongated active elements
 H01Q 7/00
Loop aerials with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
 H01Q 7/02
·  Collapsible aerials; Retractable aerials
 H01Q 7/04
·  Screened aerials (H01Q 7/02, H01Q 7/06 take precedence)
 H01Q 7/06
·  with core of ferromagnetic material (H01Q 7/02 takes precedence)
 H01Q 7/08
·  ·  Ferrite rod or like elongated core
 H01Q 9/00
Electrically-short aerials having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements (loop aerials H01Q 7/00; waveguide horns or mouths H01Q 13/00; slot aerials H01Q 13/00; combinations of active elements with secondary devices to give desired directional characteristic H01Q 19/00; combinations of two or more active elements H01Q 21/00)
 H01Q 9/02
·  Non-resonant aerials
 H01Q 9/04
·  Resonant aerials
 H01Q 9/06
·  ·  Details
 H01Q 9/08
·  ·  ·  Junction boxes specially adapted for supporting adjacent ends of collinear rigid elements
 H01Q 9/10
·  ·  ·  Junction boxes specially adapted for supporting adjacent ends of divergent elements
 H01Q 9/12
·  ·  ·  ·  adapted for adjustment of angle between elements
 H01Q 9/14
·  ·  ·  Length of element or elements adjustable (telescopic elements H01Q 1/10)
 H01Q 9/16
·  ·  with feed intermediate between the extremities of the aerial, e.g. centre-fed dipole (H01Q 9/44 takes precedence)
 H01Q 9/18
·  ·  ·  Vertical disposition of the aerial
 H01Q 9/20
·  ·  ·  Two collinear substantially straight active elements; Substantially straight single active elements (H01Q 9/28 takes precedence)
 H01Q 9/22
·  ·  ·  ·  Rigid rod or equivalent tubular element or elements
 H01Q 9/24
·  ·  ·  ·  Shunt feed arrangements to single active elements, e.g. for delta matching
 H01Q 9/26
·  ·  ·  with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength (resonant loop aerials H01Q 7/00)
 H01Q 9/27
·  ·  ·  ·  Spiral aerials  [3]
 H01Q 9/28
·  ·  ·  Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines (biconical horns H01Q 13/04)
 H01Q 9/30
·  ·  with feed to end of elongated active element, e.g. unipole (H01Q 9/44 takes precedence)
 H01Q 9/32
·  ·  ·  Vertical arrangement of element (H01Q 9/40 takes precedence)
 H01Q 9/34
·  ·  ·  ·  Mast, tower, or like self-supporting or stay-supported aerial
 H01Q 9/36
·  ·  ·  ·  with top loading
 H01Q 9/38
·  ·  ·  ·  with counterpoise (with counterpoise comprising elongated elements coplanar with the active element H01Q 9/44)
 H01Q 9/40
·  ·  ·  Element having extended radiating surface
 H01Q 9/42
·  ·  ·  with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
 H01Q 9/43
·  ·  ·  ·  Scimitar aerials  [3]
 H01Q 9/44
·  ·  with plurality of divergent straight elements, e.g. V-dipole, X-aerial; with plurality of elements having mutually inclined substantially straight portions (turnstile aerials H01Q 21/26)
 H01Q 9/46
·  ·  ·  with rigid elements diverging from single point
 H01Q 11/00
Electrically-long aerials having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements (leaky-waveguide aerials, slot aerials H01Q 13/00; combinations of active elements with secondary devices to give desired directional characteristic H01Q 19/00; aerial arrays or systems H01Q 21/00)
 H01Q 11/02
·  Non-resonant aerials, e.g. travelling-wave aerial
 H01Q 11/04
·  ·  with parts bent, folded, shaped, screened, or electrically loaded to obtain desired phase relation of radiation from selected sections of the aerial (rhombic aerials, V-aerials H01Q 11/06)
 H01Q 11/06
·  ·  Rhombic aerials; V-aerials
 H01Q 11/08
·  ·  Helical aerials
 H01Q 11/10
·  ·  Log-periodic aerials (H01Q 11/08 takes precedence)
 H01Q 11/12
·  Resonant aerials
 H01Q 11/14
·  ·  with parts bent, folded, shaped, or screened, or with phasing impedances, to obtain desired phase relation of radiation from selected sections of the aerial or to obtain desired polarisation effects
 H01Q 11/16
·  ·  ·  in which the selected sections are collinear
 H01Q 11/18
·  ·  ·  in which the selected sections are parallelly spaced
 H01Q 11/20
·  ·  V-aerials
 H01Q 13/00
Waveguide horns or mouths; Slot aerials; Leaky-waveguide aerials; Equivalent structures causing radiation along the transmission path of a guided wave (multimode aerials H01Q 25/04)
 H01Q 13/02
·  Waveguide horns
 H01Q 13/04
·  ·  Biconical horns (biconical dipoles comprising two conical surfaces having collinear axes and adjacent apices and fed by a two-conductor transmission line H01Q 9/28)
 H01Q 13/06
·  Waveguide mouths (horns H01Q 13/02)
 H01Q 13/08
·  Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
 H01Q 13/10
·  Resonant slot aerials
 H01Q 13/12
·  ·  Longitudinally slotted cylinder aerials; Equivalent structures
 H01Q 13/14
·  ·  ·  Skeleton cylinder aerials
 H01Q 13/16
·  ·  Folded slot aerials
 H01Q 13/18
·  ·  the slot being backed by, or formed in boundary wall of, a resonant cavity (longitudinally slotted cylinder H01Q 13/12)
 H01Q 13/20
·  Non-resonant leaky-waveguide or transmission-line aerials; Equivalent structures causing radiation along the transmission path of a guided wave
 H01Q 13/22
·  ·  Longitudinal slot in boundary wall of waveguide or transmission line
 H01Q 13/24
·  ·  constituted by a dielectric or ferromagnetic rod or pipe (H01Q 13/28 takes precedence)
 H01Q 13/26
·  ·  Surface waveguide constituted by a single conductor, e.g. strip conductor
 H01Q 13/28
·  ·  comprising elements constituting electric discontinuities and spaced in direction of wave propagation, e.g. dielectric elements, conductive elements forming artificial dielectric (Yagi aerials H01Q 19/30)
 H01Q 15/00
Devices for reflection, refraction, diffraction, or polarisation of waves radiated from an aerial, e.g. quasi-optical devices (variable for purpose of altering directivity H01Q 3/00; arrangements of such devices for guiding waves H01P 3/20; variable for purpose of modulation H03C 7/02)
 H01Q 15/02
·  Refracting or diffracting devices, e.g. lens, prism
 H01Q 15/04
·  ·  comprising wave-guiding channel or channels bounded by effective conductive surfaces substantially perpendicular to the electric vector of the wave, e.g. parallel-plate waveguide lens
 H01Q 15/06
·  ·  comprising plurality of wave-guiding channels of different length
 H01Q 15/08
·  ·  formed of solid dielectric material
 H01Q 15/10
·  ·  comprising three-dimensional array of impedance discontinuities, e.g. holes in conductive surfaces or conductive discs forming artificial dielectric (leaky-waveguide aerials H01Q 13/28)
 H01Q 15/12
·  ·  functioning also as polarisation filter
 H01Q 15/14
·  Reflecting surfaces; Equivalent structures
 H01Q 15/16
·  ·  curved in two dimensions, e.g. paraboloidal
 H01Q 15/18
·  ·  comprising plurality of mutually inclined plane surfaces, e.g. corner reflector
 H01Q 15/20
·  ·  ·  Collapsible reflectors
 H01Q 15/22
·  ·  functioning also as polarisation filter
 H01Q 15/23
·  Combinations of reflecting surfaces with refracting or diffracting devices  [3]
 H01Q 15/24
·  Polarising devices; Polarisation filters (devices functioning simultaneously both as polarisation filters and as refracting or diffracting devices or as reflectors H01Q 15/12, H01Q 15/22)
 H01Q 17/00
Devices for absorbing waves radiated from an aerial; Combinations of such devices with active aerial elements or systems
 H01Q 19/00
Combinations of primary active aerial elements and units with secondary devices, e.g. with quasi-optical devices, for giving the aerial a desired directional characteristic
 H01Q 19/02
·  Details
 H01Q 19/04
·  ·  Means for collapsing H-aerials or Yagi aerials
 H01Q 19/06
·  using refracting or diffracting devices, e.g. lens
 H01Q 19/08
·  ·  for modifying the radiation pattern of a radiating horn in which it is located
 H01Q 19/09
·  ·  wherein the primary active element is coated with or embedded in a dielectric or magnetic material (protective material H01Q 1/40; with variable characteristics H01Q 3/44)  [3]
 H01Q 19/10
·  using reflecting surfaces
 H01Q 19/12
·  ·  wherein the surfaces are concave (H01Q 19/18 takes precedence)
 H01Q 19/13
·  ·  ·  the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination (H01Q 19/15 takes precedence)  [3]
 H01Q 19/14
( transferred to H01Q 19/13, H01Q 19/15, H01Q 19/17 )
 H01Q 19/15
·  ·  ·  the primary radiating source being a line source, e.g. leaky waveguide aerials  [3]
 H01Q 19/16
( transferred to H01Q 19/13, H01Q 19/15, H01Q 19/17 )
 H01Q 19/17
·  ·  ·  the primary radiating source comprising two or more radiating elements (H01Q 19/15, H01Q 25/00 take precedence)  [3]
 H01Q 19/18
·  ·  having two or more spaced reflecting surfaces (producing pencil beam by two cylindrical reflectors with their focal lines orthogonally disposed H01Q 19/20)
 H01Q 19/185
·  ·  ·  wherein the surfaces are plane  [3]
 H01Q 19/19
·  ·  ·  comprising one main concave reflecting surface associated with an auxiliary reflecting surface  [3]
 H01Q 19/195
·  ·  ·  ·  wherein a reflecting surface acts also as a polarisation filter or a polarising device  [3]
 H01Q 19/20
·  Producing pencil beam by two cylindrical focusing devices with their focal lines orthogonally disposed
 H01Q 19/22
·  using a secondary device in the form of a single substantially straight conductive element
 H01Q 19/24
·  ·  the primary active element being centre-fed and substantially straight, e.g. H-aerial
 H01Q 19/26
·  ·  the primary active element being end-fed and elongated
 H01Q 19/28
·  using a secondary device in the form of two or more substantially straight conductive elements (log-periodic aerials H01Q 11/10; constituting a reflecting surface H01Q 19/10)
 H01Q 19/30
·  ·  the primary active element being centre-fed and substantially straight, e.g. Yagi aerial
 H01Q 19/32
·  ·  the primary active element being end-fed and elongated
 H01Q 21/00
Aerial arrays or systems (producing a beam the orientation or the shape of the directional pattern of which can be changed or varied H01Q 3/00; electrically-long aerials H01Q 11/00)
 H01Q 21/06
·  Arrays of individually energised aerial units similarly polarised and spaced apart
 H01Q 21/08
·  ·  the units being spaced along, or adjacent to, a rectilinear path
 H01Q 21/10
·  ·  ·  Collinear arrangements of substantially straight elongated conductive units
 H01Q 21/12
·  ·  ·  Parallel arrangements of substantially straight elongated conductive units (travelling-wave aerials comprising transmission line loaded with transverse elements, e.g. "fishbone" aerial, H01Q 11/04)
 H01Q 21/14
·  ·  ·  ·  Adcock aerials
 H01Q 21/16
·  ·  ·  ·  ·  U-type
 H01Q 21/18
·  ·  ·  ·  ·  H-type
 H01Q 21/20
·  ·  the units being spaced along, or adjacent to, a curvilinear path
 H01Q 21/22
·  ·  Aerial units of the array energised non-uniformly in amplitude or phase, e.g. tapered array, binomial array
 H01Q 21/24
·  Combinations of aerial units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
 H01Q 21/26
·  ·  Turnstile or like aerials comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
 H01Q 21/28
·  Combinations of substantially independent non-interacting aerial units or systems
 H01Q 21/29
·  Combinations of different interacting aerial units for giving a desired directional characteristic (H01Q 25/00 takes precedence)  [3]
 H01Q 21/30
·  Combinations of separate aerial units operating in different wavebands and connected to a common feeder system
 H01Q 23/00
Aerials with active circuits or circuit elements integrated within them or attached to them  [3]
 H01Q 23/00

Note(s)

Group H01Q 23/00 includes only such combinations in which the type of aerial or aerial element is immaterial. Combinations with a particular type of aerial are classified in the group appropriate to that type. [3]

 H01Q 25/00
Aerials or aerial systems providing at least two radiating patterns (arrangements for changing or varying the orientation or the shape of the directional pattern H01Q 3/00)  [3]
 H01Q 25/02
·  providing sum and difference patterns (multimode aerials H01Q 25/04)  [3]
 H01Q 25/04
·  multimode aerials  [3]