A multi-frequency array antenna, includes a reflective metal plate, a low-frequency radiation column element which is arranged on the reflective metal plate and operating in a first frequency band range, and a high-frequency radiation column element operating in a second frequency band range. The low-frequency radiation column element comprises several low-frequency radiation units arranged at an equal first distance in the axial direction of a first reference axis. The high-frequency radiation column element comprises several high-frequency radiation units arranged at an equal second distance in the axial direction of the first reference axis. The first distance is 2.5 times the second distance. At least one of the low-frequency radiation units is nested with one high-frequency radiation unit locationally corresponding thereto, and at least one of the low-frequency radiation units is axially located between two adjacent high-frequency radiation units close to the low-frequency radiation unit.

A multi-frequency array antenna, includes a reflective metal plate, a low-frequency radiation column element which is arranged on the reflective metal plate and operating in a first frequency band range, and a high-frequency radiation column element operating in a second frequency band range. The low-frequency radiation column element comprises several low-frequency radiation units arranged at an equal first distance in the axial direction of a first reference axis. The high-frequency radiation column element comprises several high-frequency radiation units arranged at an equal second distance in the axial direction of the first reference axis. The first distance is 2.5 times the second distance. At least one of the low-frequency radiation units is nested with one high-frequency radiation unit locationally corresponding thereto, and at least one of the low-frequency radiation units is axially located between two adjacent high-frequency radiation units close to the low-frequency radiation unit.

A radio frequency antenna array uses lenses and RF elements, to provide ground-based coverage for cellular communication. The antenna array can include a spherical lens, 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. 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 a spherical lens, 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. 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.

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 method and apparatus are provided for generating a thermal image of a target. The method comprises: at one or more electro-magnetic transducers, receiving long wave infra-red (LWIR) radiation emitted from the target; illuminating the electro-magnetic transducers with radiation being transmitted wavelengths that belong to Near Infra-Red (NIR) band and/or that belong to the visible (VIS) band; converting at least part of the radiation received as LWIR radiation to energy at the NIR band and/or at the VIS band; and generating a thermal image based on the energy retrieved after converting at least part of the LWIR radiation received, to energy at the NIR band and/or at the VIS band, and wherein receiving the LWIR radiation and illuminating the electro-magnetic transducers, are carried out simultaneously.

A reflector for a multi-radiator antenna which comprises electrically conducting reflector parts and one or more connector device. At least two reflector parts are each provided with at least one connecting portion. At least one connector device is adapted to provide an electrical interconnection between at least two of the reflector parts. At least one connector device comprises a metallic film and one or more holding elements. The metallic film is adapted to be arranged in abutment with connecting portions of the at least two of the reflector parts to achieve the electrical interconnection. At least one of the holding elements has at least one holding portion adapted to connect to a connecting portion of a reflector part with said metallic film sandwiched therebetween. The electrical interconnection is indirect by means of a dielectric coating or layer arranged on the metallic film and/or on the connecting portions, or by means of a dielectric film arranged between the metallic film and the connecting portions.

A mobile radio antenna for connection to at least one mobile base station. The mobile radio antenna comprises a plurality of radiating elements and an antenna array module, which comprises at least a first housing module. The first housing module comprises a first receiving space and a second receiving space, which are separated from each other by at least one partition. A first phase shifter arrangement is situated in the first receiving space. A first duplex filter assembly is situated in the second receiving space. The at least one partition comprises a first opening, wherein a common terminal of the first duplex filter assembly is electrically or electromagnetically connected to a common terminal of the first phase shifter arrangement through the first opening. Furthermore, an antenna-side terminal of the first phase shifter arrangement is electrically connected directly or indirectly to a first terminal of at least one radiating element.

A mobile radio antenna for connection to at least one mobile base station. The mobile radio antenna comprises a plurality of radiating elements and an antenna array module, which comprises at least a first housing module. The first housing module comprises a first receiving space and a second receiving space, which are separated from each other by at least one partition. A first phase shifter arrangement is situated in the first receiving space. A first duplex filter assembly is situated in the second receiving space. The at least one partition comprises a first opening, wherein a common terminal of the first duplex filter assembly is electrically or electromagnetically connected to a common terminal of the first phase shifter arrangement through the first opening. Furthermore, an antenna-side terminal of the first phase shifter arrangement is electrically connected directly or indirectly to a first terminal of at least one radiating element.