Abstract: An antenna comprises a main reflector, a waveguide, wherein at least part of the waveguide protrudes towards a region external to the antenna, wherein the antenna is operative to transmit electromagnetic radiations between the waveguide and the main reflector, a mechanism which enables displacement of at least part of the waveguide with respect to the main reflector, and an actuator operative to displace the at least part of the waveguide.

Abstract: A diplexer for an antenna comprises a first waveguide operative in a first frequency range, a second waveguide operative in a second higher frequency range, a third waveguide operative in the first frequency range, a transmission device comprising at least three electric conductors, in which at least one of (i) or (ii) is met: (i) the transmission device is operative to receive electromagnetic radiations with at least one type of polarization and in the first frequency range from the third waveguide and to transmit electromagnetic radiations with said type of polarization and in the first frequency range to the first waveguide; (ii) the transmission device is operative to receive electromagnetic radiations with at least one type of polarization and in the first frequency range from the first waveguide and to transmit electromagnetic radiations with said type of polarization and in the first frequency range to the third waveguide.

Abstract: A feed for a dual-band antenna, comprising: a first waveguide for low frequency electromagnetic radiations, a second dielectric waveguide for high frequency electromagnetic radiations, an end connected to a low band port configured to pass said low frequency electromagnetic radiations, and a high band port configured to pass said high frequency electromagnetic radiations, wherein the first waveguide comprises a first longitudinal section and a second longitudinal section, wherein a minimal distance between an internal surface of walls of the first section and an external surface of walls of the second dielectric waveguide is D11 along a lateral direction orthogonal to the longitudinal direction, and wherein a maximal distance between an internal surface of at least one first wall of the second section and an external surface of a wall of the second dielectric waveguide facing said first wall is D12 along said lateral direction, wherein D12<D11.

Abstract: A feed for a dual-band antenna, comprising: a first waveguide for low frequency electromagnetic radiations, a second dielectric waveguide for high frequency electromagnetic radiations, an end connected to a low band port configured to pass said low frequency electromagnetic radiations, and a high band port configured to pass said high frequency electromagnetic radiations, wherein the first waveguide comprises a first longitudinal section and a second longitudinal section, wherein a minimal distance between an internal surface of walls of the first section and an external surface of walls of the second dielectric waveguide is D11 along a lateral direction orthogonal to the longitudinal direction, and wherein a maximal distance between an internal surface of at least one first wall of the second section and an external surface of a wall of the second dielectric waveguide facing said first wall is D12 along said lateral direction, wherein D12<D11.

Abstract: An antenna array configuration is provided with h-plane splitters between ends of a feeding network and radiating elements e.g. horns, thereby to reduce the distance between the centers of the horns to less than one wavelength which results in a better side lobe level. A method of manufacturing upper and lower plates together constituting an antenna is also provided, typically making each plate in a single operation, by dividing the feeding network's waveguides at the center where there are no cross currents so as not to disturb propagation in the feeding network. The radiating elements, h-plane splitters and upper half of the feeding network may be fabricated in one plate without undercuts hence simplifying manufacture of the plate which may for example be formed using a simple molding machine or a 3 axis-CNC machine.

Abstract: An antenna array configuration is provided with h-plane splitters between ends of a feeding network and radiating elements e.g. horns, thereby to reduce the distance between the centers of the horns to less than one wavelength which results in a better side lobe level. A method of manufacturing upper and lower plates together constituting an antenna is also provided, typically making each plate in a single operation, by dividing the feeding network's waveguides at the centre where there are no cross currents so as not to disturb propagation in the feeding network. The radiating elements, h-plane splitters and upper half of the feeding network may be fabricated in one plate without undercuts hence simplifying manufacture of the plate which may for example be formed using a simple molding machine or a 3 axis-CNC machine.

Abstract: An antenna array configuration is provided with h-plane splitters between ends of a feeding network and radiating elements e.g. horns, thereby to reduce the distance between the centers of the horns to less than one wavelength which results in a better side lobe level. A method of manufacturing upper and lower plates together constituting an antenna is also provided, typically making each plate in a single operation, by dividing the feeding network's waveguides at the centre where there are no cross currents so as not to disturb propagation in the feeding network. The radiating elements, h-plane splitters and upper half of the feeding network may be fabricated in one plate without undercuts hence simplifying manufacture of the plate which may for example be formed using a simple molding machine or a 3 axis-CNC machine.

Abstract: An antenna array configuration is provided with h-plane splitters between ends of a feeding network and radiating elements e.g. horns, thereby to reduce the distance between the centers of the horns to less than one wavelength which results in a better side lobe level. A method of manufacturing upper and lower plates together constituting an antenna is also provided, typically making each plate in a single operation, by dividing the feeding network's waveguides at the centre where there are no cross currents so as not to disturb propagation in the feeding network. The radiating elements, h-plane splitters and upper half of the feeding network may be fabricated in one plate without undercuts hence simplifying manufacture of the plate which may for example be formed using a simple molding machine or a 3 axis-CNC machine.