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
Introduced: September 1968
Last revised: January 2006
Full Title
Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system > 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
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ANTENNAS, i.e. RADIO AERIALS
Scope Notes
Glossary: Beam forming controlling the direction of a radiated beam (or, correspondingly at a receiving antenna, the direction of greatest sensitivity) by weighting and summing the signals at several elements Weighting controlling the phase and amplitude of the signals at the active radiating elements; changing the weighting of one element relative to the others changes the direction and the beam-width or beam-form of the radiation pattern Analogue beam forming (RF beam forming) in analogue beam forming, modification of the amplitude or phase of the signals at elements takes place in the lines or components carrying the signals, i.e. in the RF domain Digital beam forming in digital beam forming control of the amplitude or phase of the signals takes place inside a beam forming computer processor. In a receiver equipped with a digital beam forming array, the signals received from each element are digitized and processed to give a desired directional response. Similarly, at a transmitter, signals for each array element may be processed to produce a desired beam-form. | Limiting references: Arrangements for varying the orientation in accordance with variation of frequency of radiated wave Arrangements for varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
2 direct subcodes
Child Classifications
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