H04B TRANSMISSION
Introduced: September 1968
Last revised: January 1985
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TRANSMISSION
Description
H04B covers the technical systems and methods for transmitting signals, data, and information through various communication media and channels. This subclass encompasses transmission techniques across multiple frequency ranges, including radio transmission, wire-based transmission, optical transmission, and hybrid systems. It includes aspects such as signal modulation, amplification, filtering, impedance matching, and transmission line design, as well as technologies for managing bandwidth, noise, and signal quality. Adjacent classes address reception techniques (H04B15), specific communication protocols and applications (H04L-H04W), and individual component design.
Related Keywords
10 direct subcodes
Child Classifications
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- H04B 1/00 Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission
- H04B 10/00 Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B 11/00 Transmission systems employing ultrasonic, sonic or infrasonic waves
- H04B 13/00 Transmission systems characterised by the medium used for transmission, not provided for in groups
- H04B 14/00 Transmission systems not characterised by the medium used for transmission
- H04B 15/00 Suppression or limitation of noise or interference
- H04B 17/00 Monitoring; Testing
- H04B 3/00 Line transmission systems
- H04B 5/00 Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B 7/00 Radio transmission systems, i.e. using radiation field