Apparatuses for mounting an antenna assembly
Methods, systems, and devices are described for mounting an antenna assembly to a vehicle, whereby rotational degrees of freedom between the antenna assembly and the vehicle are constrained. For example, an antenna mount may employ an intermediate structure between the antenna assembly and the vehicle. In various examples, the intermediate structure may be coupled with one of the vehicle or the antenna assembly by a linear coupling, and the intermediate structure may be coupled with the other of the vehicle or the antenna assembly by a planar coupling. The antenna assembly may be coupled with the vehicle by a compliant coupling that provides a centering force between the antenna assembly and the vehicle. According to various examples, rotational movement between the antenna assembly and the vehicle may be suppressed, and vibration from the vehicle to the antenna assembly may be attenuated.
1. An apparatus, comprising:
an antenna assembly comprising an alignment control system configured to position a direction of highest signal gain of the antenna assembly according to an elevation angle relative to a reference plane of the antenna assembly and an azimuth angle about an axis perpendicular to the reference plane; and
an antenna mount coupled with the antenna assembly, the antenna mount comprising:
a planar coupling configured to:
permit translations between the alignment control system and a mounting structure of the antenna mount along a plurality of directions parallel to the reference plane; and
prevent rotations between the alignment control system and the mounting structure of the antenna mount about a plurality of axes that are parallel to the reference plane; and
a linear coupling configured to:
permit translations between the alignment control system and the mounting structure of the antenna mount along a direction perpendicular to the reference plane; and
prevent rotations between the alignment control system and the mounting structure of the antenna mount about the plurality of axes that are parallel to the reference plane.
2. The apparatus of claim 1 , wherein the antenna mount is configured to:
provide a centering force between the antenna assembly and the mounting structure of the antenna mount based at least in part on the translations between the antenna assembly and the mounting structure of the antenna mount along the plurality of directions parallel to the reference plane and the translations between the antenna assembly and the mounting structure of the antenna mount along the direction perpendicular to the reference plane.
3. The apparatus of claim 2 , wherein the antenna mount is configured to:
provide the centering force between the antenna assembly and the mounting structure of the antenna mount based at least in part on rotations between the antenna assembly and the mounting structure of the antenna mount about axes that are perpendicular to the reference plane.
4. The apparatus of claim 2 , wherein the antenna mount is configured to:
provide the centering force in accordance with a first stiffness parallel to the reference plane, and a second stiffness, different than the first stiffness, along the direction perpendicular to the reference plane.
5. The apparatus of claim 1 , wherein the antenna mount is configured to:
provide a damping force or a friction force between the antenna assembly and the mounting structure of the antenna mount based at least in part on the translations between the antenna assembly and the mounting structure of the antenna mount along the plurality of directions parallel to the reference plane and the translations between the antenna assembly and the mounting structure of the antenna mount along the direction perpendicular to the reference plane.
6. The apparatus of claim 5 , wherein the antenna mount is configured to:
provide the damping force or the friction force between the antenna assembly and the mounting structure of the antenna mount based at least in part on rotations between the antenna assembly and the mounting structure of the antenna mount about axes that are perpendicular to the reference plane.
7. The apparatus of claim 2 , wherein the antenna mount is configured to support a first natural frequency between the antenna assembly and the mounting structure of the antenna mount along the plurality of directions parallel to the reference plane and a second natural frequency between the antenna assembly and the mounting structure of the antenna mount, different than the first natural frequency, along the direction perpendicular to the reference plane.
8. The apparatus of claim 1 , wherein the antenna mount is further configured to:
prevent rotations between the alignment control system and the mounting structure of the antenna mount about axes that are perpendicular to the reference plane.
9. An apparatus, comprising:
an antenna assembly comprising an alignment control system configured to position a direction of highest signal gain of the antenna assembly according to an elevation angle relative to a reference plane of the antenna assembly and an azimuth angle about an axis perpendicular to the reference plane; and
an antenna mount coupled with the antenna assembly, the antenna mount configured to:
permit translations between the antenna assembly and a first structure of the antenna mount along directions parallel to the reference plane;
permit translations between the antenna assembly and the first structure of the antenna mount along a direction perpendicular to the reference plane;
prevent rotations between the antenna assembly and the first structure of the antenna mount about axes that are parallel to the reference plane;
prevent translations between the antenna assembly and a second structure of the antenna mount along the direction perpendicular to the reference plane;
permit translations between the antenna assembly and the second structure of the antenna mount along the directions parallel to the reference plane;
permit translations between the second structure of the antenna mount and the first structure of the antenna mount along the direction perpendicular to the reference plane; and
prevent translations between the second structure of the antenna mount and the first structure of the antenna mount along the directions parallel to the reference plane.
10. The apparatus of claim 9 , wherein the antenna mount is configured to:
provide a preload force between the antenna assembly and the second structure of the antenna mount along the direction perpendicular to the reference plane.
11. The apparatus of claim 10 , wherein the antenna mount is configured to:
provide a sliding contact or a rolling contact between the antenna assembly and the second structure of the antenna mount that is based at least in part on the preload force between the antenna assembly and the second structure of the antenna mount along the direction perpendicular to the reference plane.
12. The apparatus of claim 9 , wherein the antenna mount is configured to:
prevent rotations between the antenna assembly and the second structure of the antenna mount about the axes that are parallel to the reference plane; and
prevent rotations between the second structure of the antenna mount and the first structure of the antenna mount about the axes that are parallel to the reference plane.
13. The apparatus of claim 9 , wherein the antenna mount is configured to:
prevent rotations between the antenna assembly and the second structure of the antenna mount about axes that are perpendicular to the reference plane.
14. The apparatus of claim 9 , wherein the antenna mount is configured to:
prevent rotations between the second structure of the antenna mount and the first structure of the antenna mount about axes that are perpendicular to the reference plane.
15. An apparatus, comprising:
an antenna assembly comprising an alignment control system configured to position a direction of highest signal gain of the antenna assembly according to an elevation angle relative to a reference plane of the antenna assembly and an azimuth angle about an axis perpendicular to the reference plane; and
an antenna mount coupled with the antenna assembly, the antenna mount configured to:
permit translations between the antenna assembly and a first structure of the antenna mount along directions parallel to the reference plane;
permit translations between the antenna assembly and the first structure of the antenna mount along a direction perpendicular to the reference plane;
prevent rotations between the antenna assembly and the first structure of the antenna mount about axes that are parallel to the reference plane;
permit translations between the antenna assembly and a second structure of the antenna mount along the direction perpendicular to the reference plane;
prevent translations between the antenna assembly and the second structure of the antenna mount along the directions parallel to the reference plane;
prevent translations between the second structure of the antenna mount and the first structure of the antenna mount along the direction perpendicular to the reference plane; and
permit translations between the second structure of the antenna mount and the first structure of the antenna mount along the directions parallel to the reference plane.
16. The apparatus of claim 15 , wherein the antenna mount is configured to:
provide a preload force between the second structure of the antenna mount and the first structure of the antenna mount along the direction perpendicular to the reference plane.
17. The apparatus of claim 16 , wherein the antenna mount is configured to:
provide a sliding contact or a rolling contact between the second structure of the antenna mount and the first structure of the antenna mount that is based at least in part on the preload force between the second structure of the antenna mount and the first structure of the antenna mount along the direction perpendicular to the reference plane.
18. The apparatus of claim 15 , wherein the antenna mount is configured to:
prevent rotations between the antenna assembly and the second structure of the antenna mount about the axes that are parallel to the reference plane; and
prevent rotations between the second structure of the antenna mount and the first structure of the antenna mount about the axes that are parallel to the reference plane.
19. The apparatus of claim 15 , wherein the antenna mount is configured to:
prevent rotations between the antenna assembly and the second structure of the antenna mount about the axis perpendicular to the reference plane.
20. The apparatus of claim 15 , wherein the antenna mount is configured to:
prevent rotations between the second structure of the antenna mount and the first structure of the antenna mount about the axis perpendicular to the reference plane.
21. The apparatus of claim 1 , wherein the planar coupling comprises:
a first linear bearing aligned along a first direction parallel to the reference plane; and
a second linear bearing aligned along a second direction parallel to the reference plane that is different than the first direction.
22. The apparatus of claim 1 , wherein the planar coupling comprises one or more contact points provided with a compressive preload and providing a sliding contact or a rolling contact.
23. The apparatus of claim 22 , wherein the planar coupling is configured such that, under extreme vibrations or extreme loading, the compressive preload is relieved and the one or more contact points temporarily lose contact.