ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

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.

13 direct subcodes

Child Classifications

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H01Q 1/00 Details of, or arrangements associated with, antennas (arrangements for varying orientation of directional pattern H01Q3/00)
H01Q 11/00 Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements (leaky waveguides antennas or slot antennas H01Q13/00)
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 (variable for purpose of altering directivity H01Q3/00; arrangements of such devices for guiding waves H01P3/20; variable for purpose of modulation H03C7/02)
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 (arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system H01Q3/00)
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 (arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00)
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 (combinations of separate active antenna units operating in different wavebands and connected to a common feeder system H01Q21/30)
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