A long-range wireless power transfer system 100 is disclosed. The system 100 comprises at least a transmitting antenna 110 that is configured to receive electric power from a power source as an input, convert the input electric power into electromagnetic energy, and radiate the electromagnetic energy into free space as a directional beam that is a collimated or substantially collimated beam. The rectifying antenna 130 is positioned or configured to be positioned at a distance from the transmitting antenna 110. The rectifying antenna 130 is configured to receive the directional beam and convert the electromagnetic energy into electricity. In certain embodiments, the system 100 utilise one or more phase correcting devices 120, 122 to maintain the directional beam as the collimated beam and to increase a range to which the directional beam is maintained as the collimated or substantially collimated beam.

A long-range wireless power transfer system 100 is disclosed. The system 100 comprises at least a transmitting antenna 110 that is configured to receive electric power from a power source as an input, convert the input electric power into electromagnetic energy, and radiate the electromagnetic energy into free space as a directional beam that is a collimated or substantially collimated beam. The rectifying antenna 130 is positioned or configured to be positioned at a distance from the transmitting antenna 110. The rectifying antenna 130 is configured to receive the directional beam and convert the electromagnetic energy into electricity. In certain embodiments, the system 100 utilise one or more phase correcting devices 120, 122 to maintain the directional beam as the collimated beam and to increase a range to which the directional beam is maintained as the collimated or substantially collimated beam.

An attenuator is configured to attenuate and phase-shift a radiofrequency signal according to a control signal, having a plurality of first attenuation cells (A.sub.1, A.sub.N−1), configured to attenuate said radiofrequency signal by a predetermined value and activated according to a particular bit of the control signal, and implementing a combinatorial logic on the bits of the control signal that are used to control the first attenuation cells, and at least one second attenuation cell (B.sub.1, B.sub.M) configured to attenuate said radiofrequency signal by a predetermined value and activated according to a particular output implementing the combinatorial logic. A control node is also provided for an array antenna having such an attenuator, and an array antenna having an array of such control node and a satellite.

According to one embodiment, a power divider includes a first transmission line, a first input transmission line, a second input transmission line, and the plurality of output transmission lines. The first transmission line has a closed structure. The first input transmission line and the second input transmission line are connected to the first transmission line at locations away from each other along the first transmission line by approximately a quarter of a length of the first transmission line. The plurality of output transmission lines are connected to the first transmission line at locations dividing the length of the first transmission line substantially evenly.

According to one embodiment, a power divider includes a first transmission line, a first input transmission line, a second input transmission line, and the plurality of output transmission lines. The first transmission line has a closed structure. The first input transmission line and the second input transmission line are connected to the first transmission line at locations away from each other along the first transmission line by approximately a quarter of a length of the first transmission line. The plurality of output transmission lines are connected to the first transmission line at locations dividing the length of the first transmission line substantially evenly.

Technologies directed to a slot antenna as a calibration antenna for a phased array antenna are described. The antenna structure includes a ground plane, a first antenna element, and a second antenna element. The first antenna element and the second antenna element are located in a first plane that is separated from the ground plane by a first distance. The second antenna element is separated from the first antenna element by a second distance. Conductive material is located in the first plane the first antenna element and the second antenna element. A portion of the conductive material adjacent to the first antenna element includes a slot antenna. A radio frequency feed point is located at the slot antenna. The conductive material electrically isolates the first antenna element and the second antenna element and radiates electromagnetic energy as a slot antenna.

A disclosed method for secured multi-payload antennas operators operations comprises generating, by an antenna operations center (AOC), AOC commands using an antenna location pointing request for each of at least one antenna associated with each of at least one customer. The method further comprises transmitting, by a satellite operation center (SOC), the AOC commands and SOC commands to a vehicle via a ground antenna, where the SOC commands are related to at least one antenna associated with a host. Also, the method comprises generating customer antenna gimballing commands by using the AOC commands, and generating host antenna gimballing commands by using the SOC commands. Further, the method comprises gimballing respectively each of the antenna(s) associated with each of the customer(s) by using the customer antenna gimballing commands, and gimballing respectively each of the antenna(s) associated with the host by using the host antenna gimballing commands.

An antenna assembly, a terminal device having the antenna assembly, and a method for improving a radiation performance of an antenna are provided. The terminal device includes an antenna assembly, and a controller. The antenna assembly comprises an antenna, a first adjusting unit, a second adjusting unit, and an antenna switch; the controller is configured to control, based on a current working power of the antenna, the antenna switch to select one of the first adjusting unit and the second adjusting unit to be in an enabled state, so that a radiation direction of the antenna can be adjusted by the selected adjusting unit to a radiation direction formed based on the selected adjusting unit.

An antenna assembly, a terminal device having the antenna assembly, and a method for improving a radiation performance of an antenna are provided. The terminal device includes an antenna assembly, and a controller. The antenna assembly comprises an antenna, a first adjusting unit, a second adjusting unit, and an antenna switch; the controller is configured to control, based on a current working power of the antenna, the antenna switch to select one of the first adjusting unit and the second adjusting unit to be in an enabled state, so that a radiation direction of the antenna can be adjusted by the selected adjusting unit to a radiation direction formed based on the selected adjusting unit.

An antenna assembly includes a plurality of antenna elements, a microstrip feed network that is configured to supply power to the plurality of antenna elements, and one or more resistors disposed within the microstrip feed network proximate to one or more of the plurality of antenna elements. The resistors are configured to control sidelobes of the antenna assembly.