Positioning system for antenna and antenna system
A technology of positioning system and antenna system, applied in directions such as antennas, independent non-interacting antenna combinations, antennas suitable for movable objects, etc. Compact structure, light weight advantage, effect of simplified structure
Active Publication Date: 2020-09-25
LISA DRAXLMAIER GMBH
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Problems solved by technology
[0004] When operating a wireless communication system with linearly polarized electromagnetic waves, a dual-axis system has the problem that when the antenna rotates, the plane of polarization usually rotates so that the plane of polarization of the target antenna is aligned with the poles of the antenna on the positioning system. The planes are no longer consistent
In this case, the acceptable data rate is significantly reduced
[0015] In addition, the reduction of the power spectral density of the transmitted signal and the interference from adjacent satellites in the received signal both lead to the inability of the low-profile antenna on the dual-axis positioning system to operate near the equator of the FSS, or a significant loss of performance when operating
Method used
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[0079] image 3 A front view of the antenna aperture 1 is shown at an elevation angle of 0°, and is typically limited due to the range of motion of the radome 18 . Figure 4 It is shown how the angular range of rotation around the second axis can be limited by a mechanical limitation such as a stopper 21 so that the antenna aperture 1 does not leave this range of motion.
[0080] Figure 5 to Figure 8 Different alignment scenarios are shown, illustrating that the motion of the orientation system can be achieved within a very small range of motion. Figure 5 The alignment of the apertures in shows, for example, a situation where the antenna is located at the equator, but the longitude of the antenna location is different from that of the target satellite. In this case, using a biaxial positioner, the antenna aperture is aligned not with its major axis but with its minor axis parallel to the equator. However, the main beam of the antenna is very wide, and there are usually mu...
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A positioning system may include a bracket, a mounting, and a positioner platform. The positioning system may further include an antenna aperture having two opposing sides each attached to the bracket via respective first pivot bearings arranged along a first axis. The antenna aperture may be configured to rotate about the first axis. A second pivot bearing may attach the bracket to the mounting, and may be arranged along a second axis. The bracket may be configured to rotate about the second axis. A third pivot bearing may attach the mounting to the positioner platform, and may be arranged along a third axis. The mounting may be configured to rotate about the third axis.
Description
technical field [0001] The invention relates to a positioning system for antennas and an antenna system, in particular for use in vehicles, such as aircraft. The low-profile flat-panel antennas required for aircraft-satellite communication are subject to particularly narrow requirements regarding the space in which the antenna aperture is positioned towards the satellite. Background technique [0002] A positioning system for an antenna on a mobile carrier, for example a vehicle, an aircraft or a ship, has the task that during the spatial movement of the mobile carrier, the antenna is always optimally aligned with a target, typically a target antenna, for example located on a satellite target antenna. In many cases, permanent radio communication must be maintained reliably even when the carrier is moving rapidly. [0003] In order to solve the above-mentioned task, so-called dual-axis positioning systems are used in many applications, cf. JP H06-252625 A, by means of which...
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IPC IPC(8): H01Q1/12H01Q3/08
CPCH01Q1/125H01Q3/08H01Q1/28H01Q21/28
Inventor 约尔格·欧朋兰德
Owner LISA DRAXLMAIER GMBH