• All sections
• H - Electricity
• H01Q - Antennas, i.e. radio aerials
• H01Q 3/28 - 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 elementsArrangements 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 distribution of energy across a radiating aperture varying the amplitude

Patent holdings for IPC class H01Q 3/28

Total number of patents in this class: 370

10-year publication summary

Principal owners for this class