H01Q ANTENNAS, i.e. RADIO AERIALS
Introduced: September 1968
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ANTENNAS, i.e. RADIO AERIALS
Description
This classification covers the design, construction, and operation of antennas used for transmitting and receiving electromagnetic radiation in radio frequency applications. It includes various antenna types such as dipole, parabolic, helical, microstrip, phased array, and horn antennas, as well as antenna arrays and feed systems. The class encompasses both the physical antenna structures and their electrical characteristics, including impedance matching, radiation patterns, and directivity optimization. Related aspects of antenna installation, tuning mechanisms, and associated transmission line components are also included within this scope.
Scope Notes
Limiting references: Waveguides Radiators or antennas for microwave heating | Application references: Cell structures using beam steering Communication route or path selection based on characteristics of available wireless antennas Beacons or beacon systems using radio waves Direction-finders using radio waves Circuits or components for simulating antennas, e.g. dummy antenna
Related Keywords
13 direct subcodes
Child Classifications
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- H01Q 1/00 Details of, or arrangements associated with, antennas
- H01Q 11/00 Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q 13/00 Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q 15/00 Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q 17/00 Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q 19/00 Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q 21/00 Antenna arrays or systems
- H01Q 23/00 Antennas with active circuits or circuit elements integrated within them or attached to them
- H01Q 25/00 Antennas or antenna systems providing at least two radiating patterns
- H01Q 3/00 Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q 5/00 Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q 7/00 Loop antennas 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 9/00 Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements