A system for providing air traffic control within a geographic sector to which a communication frequency in the VHF or UHF range is assigned comprises at least one satellite (configured for a communication with an aircraft in the geographic sector using an analog modulated RFF signal at the communication frequency. The system is configured in such a way that at each time, only one satellite is actively transmitting on the communication frequency assigned to the geographic sector.

According to one or more embodiments, a wireless tag reader includes a first shield member, a second shield member, an antenna, and a reader. The first and second shield members face each other across a reading area through which a wireless tag can pass. Each of the first and second shield members has a reflective surface that reflects a radio wave incident thereon toward the reading area. The antenna is between the reading area and the reflective surface of one of the first and second shield members. The antenna radiates and receives radio waves to communicate with the wireless tag. The reader reads data stored in the wireless tag based on radio waves received from the wireless tag by the antenna.

A satellite-communications gateway includes a hub and an antenna configured for satellite communications. The antenna is mounted to the hub and supported by the hub. The antenna includes a plurality of panels forming a parabolic dish. The panels are carbon fiber-reinforce polymer. The parabolic dish has a diameter in a range of 9 to 13 meters.

A satellite-communications gateway includes a hub and an antenna configured for satellite communications. The antenna is mounted to the hub and supported by the hub. The antenna includes a plurality of panels forming a parabolic dish. The panels are carbon fiber-reinforce polymer. The parabolic dish has a diameter in a range of 9 to 13 meters.

An antenna assembly tunable from remote comprising a main reflector a sub-reflector associated with the main reflector, and a feed adapted receive transmission illuminating the main reflector via the sub-reflector, or to transmit transmission to the main reflector via the sub-reflector. The sub-reflector comprising a plurality of actuators disposed over and attached to its outer face. Each of the actuators is adapted to locally deform the surface of the sub-reflector adjacent to that actuator in response to a change in the actuator position.

An antenna assembly tunable from remote comprising a main reflector a sub-reflector associated with the main reflector, and a feed adapted receive transmission illuminating the main reflector via the sub-reflector, or to transmit transmission to the main reflector via the sub-reflector. The sub-reflector comprising a plurality of actuators disposed over and attached to its outer face. Each of the actuators is adapted to locally deform the surface of the sub-reflector adjacent to that actuator in response to a change in the actuator position.

In one embodiment, an antenna assembly includes a reflector antenna whose aperture is covered by a radome. The radome has a principle plane corresponding to the azimuth axis of the antenna. The radome has a bulk material and a pair of absorbers made of a radio-frequency (RF)-absorbent material different from the bulk material. The pair of absorbers are arranged symmetrically along the principle plane and about the center of the radome. The pair of absorbers are located near the perimeter of the radome and are at least partially embedded in the bulk material. The pair of absorbers cover from 4%-8% of the total aperture area of the antenna.

This invention concerns a multibeam antenna with adjustable pointing, comprising a single reflection arrangement and a plurality of radiating sources arranged opposite the reflection arrangement and suited to emit and/or receive radiofrequency (RF) signals, the reflection arrangement defining a centre, a focal plane, and a focal point located on the focal plane. The antenna is characterised in that at least one of the radiating sources (‘mobile source’) is movable substantially independently of the or each other radiating source on a scanning surface to adjust the pointing of the antenna, wherein the scanning surface coincides with the focal plane or is tangential to it at the focal point.

A signal enhancer has a framework, a concave reflector having an axis of reflection, joined to the framework in a manner that direction of the axis of the reflector may be varied, and a support a cellular telephone joined to the axis in a manner that a cellular telephone may be placed and held in the support at different distances from the reflector along the axis of the reflector.

A signal enhancer has a framework, a concave reflector having an axis of reflection, joined to the framework in a manner that direction of the axis of the reflector may be varied, and a support a cellular telephone joined to the axis in a manner that a cellular telephone may be placed and held in the support at different distances from the reflector along the axis of the reflector.