摘要:
An online adjusting method and system for an angle of a base station antenna are provided in the embodiments of the present invention. The system includes a measuring unit, a processing unit, and an adjusting unit. The measuring unit is disposed on the base station antenna, and configured to measure the angle of the base station antenna to obtain angle information, and transmit the angle information to the processing unit through a first communication interface. The processing unit is disposed in a base station control system, and configured to compare the angle information measured by the measuring unit with saved angle information to generate angle adjustment data, and transmit the angle adjustment data to the adjusting unit through a second communication interface. The adjustment unit is disposed on the base station antenna, and configured to adjust the angle of the base station antenna according to the angle adjustment data generated by the processing unit. Through the method and system provided in the embodiments of the present invention, the measurement and adjustment manners of the azimuth angle and the pitching angle of the base station antenna are changed, which greatly enhances the security and efficiency of the measurement of the angle of the base station antenna.
摘要:
A reflector (8) for a reflector antenna is provided for producing a far field pattern with near-zero field strength at a predetermined position, the reflector having a surface comprising a stepped profile for generating the near-zero field strength. The stepped profile may comprise a radial step. The location of the near-zero field strength can be steered by moving the reflector only or by adjusting the amplitude and phase of an additional beam, produced by a further radiator (16), that covers substantially the same region as the main beam reflected by the reflector.
摘要:
Transducer assembly, in particular for a ship mast, including: a base (19), one or several transducers (21,22,23,24) adapted for emitting and/or receiving electromagnetic waves to/from a distant unit, a barrier forming element (4) masking emissions and/or receptions of electromagnetic waves in a relative azimuth angle of masking, a mobile support (3;30) which bears the transducer (21,22,23,24) and which is movably mounted relative to the base along a generally circular path of movement around the mast, an actuating system for moving said mobile support (3;30) along said path of movement.
摘要:
A shared beamformer flexibly allocates beams among clusters of beams produced by phased array antenna apertures that are deployed on a satellite (or other type of platform). By sharing the beamformer among the beam clusters, if one beam cluster is not providing useful coverage, the beams may be reallocated to one or more other beam clusters that are providing useful coverage. To share the beamformer among the beam clusters, a selector network is used to select which particular beam cluster (or clusters) is used for producing one or more narrow beams that are constrained to the coverage area of the beam cluster (or clusters).
摘要:
An antenna has a 90-degree polarization separation between at least two antenna elements regardless of how a user adjusts the antenna, and yet enables the user to adjust the antenna for the best signal reception. The antenna has a pivotally adjustable structure that is configured to maintain the antenna elements at substantially a right angle with respect to each other, including a universal joint that enables the antenna to be rotated in mutually orthogonal planes. The user in one step can adjust the antenna for the best reception and simultaneously maintain optimum polarization separation between the main and the diversity antenna elements.
摘要:
A self-correcting mobile antenna control system and method. A method is provided for controlling the direction of an antenna mounted on a vehicle. The method includes determining a position decision based on a direction change signal output from a direction sensor, determining an energy decision based on a signal strength indicator, combining the position decision and the energy decision to produce an antenna control signal, and adjusting the antenna's direction based on the antenna control signal. The system also operates to periodically calibrate itself to offset any sensor errors so that intensive calibration procedures can be avoided.