The described features generally relate to adjusting a native antenna pattern of a satellite to adapt communications via the satellite. For example, a communications satellite may include an antenna having a feed array assembly, a reflector, and a linear actuator coupled between the feed array assembly and the reflector. The feed array assembly may have a plurality of feeds for communicating signals associated with a communications service, and the reflector may be configured to reflect the signals transmitted between the feed array assembly and one or more target devices. The linear actuator may have an adjustable length, or otherwise provide an adjustable position between the feed array assembly and the reflector. By adjusting the position of the feed array assembly relative to the reflector, the communications satellite may provide a communications service according to a plurality of native antenna patterns.

The described features generally relate to adjusting a native antenna pattern of a satellite to adapt communications via the satellite. For example, a communications satellite may include an antenna having a feed array assembly, a reflector, and a linear actuator coupled between the feed array assembly and the reflector. The feed array assembly may have a plurality of feeds for communicating signals associated with a communications service, and the reflector may be configured to reflect the signals transmitted between the feed array assembly and one or more target devices. The linear actuator may have an adjustable length, or otherwise provide an adjustable position between the feed array assembly and the reflector. By adjusting the position of the feed array assembly relative to the reflector, the communications satellite may provide a communications service according to a plurality of native antenna patterns.

According to an aspect, there is provided an antenna arrangement. Said antenna arrangement comprises two or more feed antennas adapted to transmit and receive radio signals. The two or more feed antennas comprise at least a first feed antenna adapted to operate in a first frequency band and a second feed antenna adapted to operate in a second frequency band, where the first and second frequency bands being discontiguous with each other. Moreover, the antenna arrangement comprises an antenna radome arranged around the two or more feed antennas. Said antenna radome comprises a metallic section implementing an antenna reflector for the two or more feed antennas and a nonmetallic section penetrable by radio waves.

According to an aspect, there is provided an antenna arrangement. Said antenna arrangement comprises two or more feed antennas adapted to transmit and receive radio signals. The two or more feed antennas comprise at least a first feed antenna adapted to operate in a first frequency band and a second feed antenna adapted to operate in a second frequency band, where the first and second frequency bands being discontiguous with each other. Moreover, the antenna arrangement comprises an antenna radome arranged around the two or more feed antennas. Said antenna radome comprises a metallic section implementing an antenna reflector for the two or more feed antennas and a nonmetallic section penetrable by radio waves.

A radio frequency antenna array uses lenses and RF elements, to provide ground-based and sky-based coverage for multiple object communication and tracking. The antenna array can include two spherical lenses, where each spherical lens has at least two associated RF elements. Each of the RF elements associated with a given lens produces an output beam with an output area. Each lens also includes a sub-controller configured to combine the output beams produced by the RF elements. The antenna includes a control mechanism configured to enable a user to move the RF elements along their respective tracks, and automatically combine, or modify the phase of, the output beams from the RF elements based on the relative positions between the RF elements. The combined beams track independent targets, such as satellites, across an area.

A radio frequency antenna array uses lenses and RF elements, to provide ground-based and sky-based coverage for multiple object communication and tracking. The antenna array can include two spherical lenses, where each spherical lens has at least two associated RF elements. Each of the RF elements associated with a given lens produces an output beam with an output area. Each lens also includes a sub-controller configured to combine the output beams produced by the RF elements. The antenna includes a control mechanism configured to enable a user to move the RF elements along their respective tracks, and automatically combine, or modify the phase of, the output beams from the RF elements based on the relative positions between the RF elements. The combined beams track independent targets, such as satellites, across an area.

In a transmitting-side control apparatus (30), a transmission control unit (32) controls a radiator (11) to transmit an OAM known signal formed by one common OAM transmission mode at each of transmitting-side relative position candidates. An acquisition unit (33) acquires a feedback signal including information about a use transmitting-side relative position based on a reception strength of the OAM known signal transmitted under the control of the transmission control unit (32). An adjustment unit (34) adjusts a relative position between the radiator (11) and a focal point of a reflecting mirror (12) to the use transmitting-side relative position indicated by the information included in the feedback signal.

In a transmitting-side control apparatus (30), a transmission control unit (32) controls a radiator (11) to transmit an OAM known signal formed by one common OAM transmission mode at each of transmitting-side relative position candidates. An acquisition unit (33) acquires a feedback signal including information about a use transmitting-side relative position based on a reception strength of the OAM known signal transmitted under the control of the transmission control unit (32). An adjustment unit (34) adjusts a relative position between the radiator (11) and a focal point of a reflecting mirror (12) to the use transmitting-side relative position indicated by the information included in the feedback signal.

A radio frequency antenna array uses lenses and RF elements, to provide ground-based coverage for cellular communication. The antenna array can include two spherical lenses, where each spherical lens has at least two associated RF elements. Each of the RF elements associated with a given lens produces an output beam with an output area. Each lens is positioned with the other lenses in a staggered arrangement. The antenna includes a control mechanism configured to enable a user to move the RF elements along their respective tracks, and automatically phase compensate the output beams produced by the RF elements based on the relative distance between the RF elements.

A radio frequency antenna array uses lenses and RF elements, to provide ground-based coverage for cellular communication. The antenna array can include two spherical lenses, where each spherical lens has at least two associated RF elements. Each of the RF elements associated with a given lens produces an output beam with an output area. Each lens is positioned with the other lenses in a staggered arrangement. The antenna includes a control mechanism configured to enable a user to move the RF elements along their respective tracks, and automatically phase compensate the output beams produced by the RF elements based on the relative distance between the RF elements.