摘要:
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.
摘要:
The present invention regards an antenna system (1;5) comprising a reflection system that comprises a reflector (11;52) having a rotational symmetry with respect to an axis of symmetry (12;54). Moreover, the antenna system (1;5) also comprises an electronically steerable planar radiating array (13;53) that is arranged in a focal region (14;55) of the reflection system, has a rotational symmetry with respect to the axis of symmetry (12;54) and is operable to radiate a primary radiofrequency beam oriented in a predefined direction of illumination with respect to the axis of symmetry (12;54) in such a way as to cause a specific region of the reflector (11;52) to be illuminated by said primary radiofrequency beam. Said specific region of the reflector (11;52) is designed, when illuminated by said primary radiofrequency beam, to generate by reflection a secondary radiofrequency beam oriented in at least one predefined direction of transmission with respect to the axis of symmetry (12;54).
摘要:
Embodiments of the present invention provide a dual-polarized antenna. The dual-polarized antenna in the present invention includes two orthogonally arranged dipole units and a metal reflector. Each dipole unit includes two radiation arms and a balun structure, a preset angle is formed between the radiation arm and the balun structure, the radiation arm is connected to one end of the balun structure, and the metal reflector has a hollow-out structure. The metal reflector is disposed below the radiation arms, and the other end of the balun structure of each of the two dipole units passes through the hollow-out structure and is unconnected to the metal reflector. According to the embodiments of the present invention, antenna structure design is simplified, manufacturing processes are decreased, and a PIM risk is avoided.
摘要:
Described embodiments provide a cupped antenna for transmitting and receiving radio signals. The cupped antenna includes a cup having a rear surface and one or more side surfaces. The rear surface and side surfaces define a cavity having a first radiating element of the cupped antenna disposed within it. The first radiating element is coupled to a first feed circuit. The one or more side surfaces have one or more indentations disposed therein. The one or more indentations are configured to reduce a size and weight of the cup. The one or more indentations also provide an opening within an aperture of the cupped antenna such that an additional antenna can be disposed within the opening.
摘要:
A single-cable protocol and associated methods and systems enable improved communication efficiency and/or reduced cost. Transmit information, receive information, telemetry information, and/or DC power may be multiplexed onto a single cable, eliminating the need for multiple cables between a satellite transceiver and a corresponding modem while reducing and/or eliminating spurious emissions. Additionally, telemetry features enable improved diagnostics and/or repair of communication systems, for example satellite communication systems.
摘要:
A tracking antenna system for use in a plurality of discrete radio frequency (RF) spectrums includes a stabilized antenna support configured to direct and maintain the antenna in alignment with a communications satellite; a reflector mounted on the stabilized antenna support, the reflector reflecting radio waves along a first RF path; a first feed for gathering radio waves within a first of the discrete RF spectrums traveling from the reflector; a sub-reflector movable between first and second positions, the first position outside the first RF path and the second position in the first RF path to redirect radio waves traveling from the reflector along the first RF path to a second RF path; a second feed for gathering radio waves within a second of the discrete RF spectrums redirected along the second RF path; and an actuator for moving the sub-reflector between the first and second positions.
摘要:
An antenna communication architecture (10) for simultaneous optimal tracking of multiple broadband satellite terminals (12) in support of in theatre (14) operations and rapid deployment applications, and methods in relation therewith. This communication architecture (10) is especially suitable for implementation as a hosted payload configuration on a host spacecraft (11).
摘要:
The parabolic antenna includes a first radiating element, a second radiating element and a parabolic dish. The operating frequency of the first radiating element is different from the operating frequency of the second radiating element. The first radiating element and the second radiating element are disposed in front of the parabolic dish. Under different circumstances, the first radiating element and the second radiating element may operate simultaneously or non-simultaneously.