EP2403058B1 - Fixing adapter for a directional antenna - Google Patents

Description

Technical area

The invention relates to a mounting adapter device for a directional radio antenna, comprising a support rod for attaching a handrail attachment of the directional radio antenna and a cross member for fixing the support rod to a support rod.

State of the art

Directional radio allows wireless transmission of information between two stationary sites. For this purpose, mostly radio waves with carrier frequencies in the microwave range between 1 and 40 GHz are used. In mobile networks radio relay is very often used to connect the individual mobile radio base stations to higher-level units. Benefits of using radio relay over leased or newly installed fixed lines are in particular lower operating costs, a faster and less expensive structure and direct access to the hardware for a mobile operator.

In directional radio directional antennas are used with high directivity. In the microwave wave range, a quasi-optical view between a transmitting station and a receiving station is necessary. The directional antennas are therefore mounted in elevated locations, such as radio towers or houses, to bridge long distances. Usually, parabolic or shell antennas with high directivity are used. With the help of two directional antennas, a radio-based point-to-point connection between two remote locations is realized in this way.

Directional radio antennas of the above type are known to be attached to a mast or handrail with a central attachment to the back of a paraboloidal reflector. Due to their exposed position on the mast, the directional radio antenna and the central attachment are exposed to considerable mechanical stress. These mechanical stresses are caused, for example, by storms, ice, snow and other precipitation.

The publication CA 2070929 A describes a holder for a parabolic antenna. The parabolic antenna is attached to a mast via a central support arranged on the rear side. In addition, two telescopic struts are provided, each with one end at the edge of central bracket and attached to the other end of the mast. Both struts can be adjusted in length and thus allow alignment of the parabolic antenna. A strut has a fixing device for fixing the length of the strut. The fixation device comprises an electromagnet that allows a change in the length of the strut on actuation. By the struts, the parabolic antenna is additionally stabilized.

A disadvantage of the on-site installation of directional antennas is that the specifications of the directional antenna manufacturers for assembly due to new product lines or experience from the assembly change so that other attachment points for the installation of microwave antennas at assembly sites are required. Such attachment points can then not be available on site and would have to be created later. This is often associated with significant costs. For larger directional antennas, one or more additional stabilizer struts may be provided by the manufacturer. However, then adjust the above-mentioned on-site disadvantages.

The DE 41 40 841 describes a microwave directional antenna with an arranged on the back, annular stiffening profile. Three mounting elements are attached to the stiffening profile. In the upper support member engages a mounting rod, which is attached at the other end with a clamp to a pipe mast. The two lower brackets are connected by a rod. To each of these lower brackets, a rod is attached in each case, which is connected to the clamp for the mounting rod on the tubular mast. In addition, another rod between a lower bracket and a second clamp on the tubular mast is arranged. The tubular mast can be attached via cross members to a support.

In the EP 0 814 538 A1 a fixture for a directional radio antenna is shown in which a plurality of rods for attaching the directional radio antenna are attached to a support tube on a rear reinforcing ring. The carrying tube is attached to a mast with crossbeams. One pole each connects an upper attachment to the reinforcing ring with an upper clamp on the support tube, a lower clamp on the support tube and a clamp on the mast. A lower attachment to the reinforcement ring is connected via another rod to the lower clamp on the support tube.

The catalog " Microwave Antenna Application Guide - Strucutral Support Products ", January 1, 2010, XP550010711 , the company CommScope represents various fixtures for directional antennas, in which the directional antenna antenna includes a handrail attachment and additionally one or two attached to the directional antenna stabilization struts. Describe will include attachment of a directional antenna to a support tube, which in turn is attached to a mast.

Disclosure of the invention

The object of the invention is therefore to avoid disadvantages of the prior art and to provide an attachment for a directional antenna, which includes lower construction costs.

The features of the invention are defined in claim 1. Optional features are listed in the subclaims.

According to the invention the object is in a mounting adapter device of the type mentioned for a directional radio antenna achieved in that the Befestigungsadaptervorrichtung has a first strut mount for attaching a first stabilizing strut of the directional radio antenna, wherein the first strut mount via a first support strut is rigidly connected to the support rod and a second support strut rigidly connected to the support rod.

When assembled, the first and second support struts together with the cross member form a triangle in the corners of the support rod, the support rod or a mast and the strut mount for the stabilization strut lie. The fixation of the stabilizing strut can be done by a direct connection to a support strut or via the fixation with another support strut. Such a construction keeps the strut mount and thus the stabilizing strut very stable.

With this mounting adapter and such an arrangement of support struts, it is possible to mount directional antennas so that the forces and torques acting on the antenna are discharged statically effectively.

Compared to the prior art, no additional mast or other additional support tube for attaching the stabilizing strut is needed. Thus, the attachment of the directional antenna can be realized very space-saving on a single support bar. Furthermore, the mounting adapter device according to the invention in all conventional directional radio antennas with a central support for a support rod and at least one additional strut attachment for a stabilizing strut without conversion measures can be used immediately.

Further embodiments and advantageous embodiments of the invention are specified in the dependent claims and the figures with the associated description.

A further advantageous embodiment of the fastening adapter device comprises a third support strut for attaching a second stabilizing strut of the directional radio antenna to the support rod and a fourth support strut for attaching the second stabilizing strut to the support rod.

In this way, a second triangle is formed by the cross member, the third support strut and the fourth support strut, in the corners of which the second strut mount for the second stabilization strut, the support rod and the Carrying pole or a mast are located. As a result, the function of the fastening adapter device is improved, statically dissipating acting forces or torques optimally. The directional radio antenna is thus reliably held at three points.

In an advantageous embodiment of the fastening adapter device, the first strut mount of the second strut mount with respect to the symmetry axis of the directional radio antenna is substantially opposite in the assembled state.

This ensures that the support struts of the mounting adapter device can be optimally arranged between the two strut brackets to keep the directional antenna stable. With such an arrangement of support struts, it is possible to mount directional antennas in such a way that the forces acting on the antenna are dissipated statically effectively without damage occurring under normal circumstances.

For clarification, it is explained that antennas are not perfectly rotationally symmetric to a rotation axis. To simplify the description, an axis perpendicular to the center of the directional radio antenna is referred to as the axis of symmetry.

An advantageous embodiment of the invention provides that the support strut is angled iron.

Support struts of holding devices or fastening devices allow different selection possibilities on the part of the material selection and shape. In the process, some criteria have to be taken into account statically in order to absorb and deduce the resulting compressive and tensile forces without damage. Due to the wedge-shaped design of the support struts, the resulting forces are optimally dissipated. But it is also an alternative embodiment of the support strut as a square tube or as a flat iron possible. With regard to the material of the fastening adapter device, both steel and carbon fiber material can be used. Carbon fiber would be used in such cases to reduce the weight of the mounting adapter device due to static boundary conditions.

An advantageous embodiment of the mounting adapter device provides that in the mounted state, the support rod and the support rod are fixed to each other via at least one cross member, wherein the cross member is not arranged parallel to the axis of symmetry of the directional radio antenna.

With this arrangement it is achieved that the mounting adapter device ensures a stable attachment of the directional antenna. The support rod and the support rod are fixed together via a designed as a square tube cross member so that acting compressive, tensile and shear forces can be derived. Furthermore, the derivative of the acting torques is optimized by an arrangement of the cross member at an angle of at least 20 ° to the perpendicular of the circular surface of the second reinforcing ring.

A further advantageous embodiment of the fastening adapter device provides that the first and second support strut and the cross member are arranged triangular in the mounted state.

In this way, a triangle is formed by the cross member, the first support strut and the second support strut, in the corners of the first strut mount for the first stabilizing strut, the support rod and the support rod or a mast are. As a result, the function of the fastening adapter device is improved to dissipate acting forces or torques static.

In an advantageous embodiment of the fastening adapter device, the first support strut and the third support strut are respectively connected to fastening means at different positions with respect to the longitudinal axis of the support rod and / or the second support strut and the fourth support strut are respectively fastened at different positions relative to the longitudinal axis of the support rod connected to this.

By this measure, the first and second support struts are not in the same plane as the third and fourth support struts. Vibration, twisting and bending of the inventive fastening adapter device are more effectively suppressed.

The above-mentioned and other advantages, features and expedient developments of the invention will become apparent from the embodiment, which will be described below with reference to the figures.

Brief description of the drawings

Fig. 1

shows a schematic schematic diagram of a plan view of an embodiment of a mounting adapter device according to the invention for a directional radio antenna.

Fig. 2

shows a schematic diagram of a rear view of the embodiment of a fastening adapter device according to the invention Fig. 1 ,

Preferred embodiment

In Fig. 1 10 denotes a microwave microwave antenna. The directional radio antenna 10 is drum-shaped and has a paraboloidal reflector 12 on the back 14 of the directional antenna 10. The directional antenna 10 further includes a side wall 16 for reinforcing a directivity of the directional radio antenna 10 and a radio-permeable front surface 18. The paraboloidal reflector 12 forms together with the Side wall 16 and the front surface 18 a housing for a in Fig. 1 not shown transmitting and receiving unit. In this way, the transmitting and receiving unit is protected against the effects of weather. Alternatively, a use of a shell-shaped directional antenna or a flat antenna is possible.

The directional antenna 10 has on the back 14 via a holder 20 for attachment to a support rod, such as a support tube, a mast or other rod. For this purpose, the reflector 12 comprises at its rear side 14 a first reinforcing ring 21 and a smaller diameter in its second reinforcing ring 22. At this reinforcing ring 22 carriers 24 are arranged for a handrail mounting 26.

Furthermore, the directional radio antenna includes a first strut attachment 28 on the edge of the back 14 for a first stabilizing strut 30. The back 14 is provided in the region of the strut attachment 28 with a first reinforcing ring 21 to ensure a reliable attachment of the stabilizing strut 30. The first reinforcing ring 21 distributes forces occurring at the strut attachment via the attachment point 28 to the stabilizing strut 30. A second strut attachment 34 for a second stabilizing strut 36 is provided on the second reinforcing ring 22 of the mount 20.

With a mounting adapter device 38, the directional antenna 10 is attached to a support rod 40. For example, the support bar 40 may be a mast or a support tube attached to a building. The shape of the support rod 40 can be round, square, or executed in other embodiments. The mounting adapter device 38 includes a support bar 42 that is fixedly connected to the handrail mounting 26 to the directional radio antenna 10. The support rod 42 is connected via two cross members 44 (see also Fig. 2 ) attached parallel to the support rod 40 at this. For fixing the cross member 44 on the support rod 40, for example, clamps or jaws can be used. Alternatively, a support bar with only one cross member or more than two cross beams is possible.

For greater stability, the fastening adapter device 38 has a first attachment point 52 for holding the first stabilizing strut 30. The stabilizing strut 30 is attached via a sliding support 46 at this attachment point 52. Thus, the first stabilizing strut 30 is retained at one end by the first strut mount 28 and near the opposite end from the first strut mount 46. The first strut mount 46 is rigidly connected to the support rod 42 via a first support strut 48 and rigidly to the support rod 40 via a second support strut 50 connected. For this purpose, corresponding fastening means 52, 54 and 56 on the first strut holder 46, the second support strut 50, the support rod 42 and the support rod 40 are provided. The first support strut 48, the second support strut 50 and the cross member 44 form a triangle in the mounted state for fixing the first strut mount 46 and thus the first stabilizing strut 30 with respect to the support rod 40 and the support rod 42nd

With a second strut mount 58, the second stabilizing strut 36 mounted on the second strut mount 34 is held. The second strut mount 58 is rigidly connected to the support rod 42 via a third support strut 60 and rigidly connected to the support rod 40 via a fourth support strut 62. For this purpose, corresponding fastening means 52, 54, 56 are used on the third and fourth support struts 60, 62, the support rod 42 and the support rod 40. The third support strut 60, the fourth support strut 62 and the cross members 44 in turn form a triangle with which the second strut mount 58 and thus the second stabilizing strut 36 are fixed relative to the support bar 40 and the support bar 42.

The Befestigungsadaptervorrichtung 38 achieves a very rigid and resistant attachment of the directional radio antenna 10 to the support rod 40. In this case, the Befestigungsadaptervorrichtung 38 occupies little space and in particular requires no additional support rod or mast for attachment of the stabilizing struts 30, 36th

Further, the directional antenna 10 is adjusted via an alignment device 64 at the second strut mount 58. After a loosening of the first strut holder 46 with respect to the first stabilizing strut 30, the aligning device 64 allows a fast and uncomplicated alignment of the directional radio antenna 10. In this case, the distance between the second strut attachment 34 on the directional antenna 10 and the second strut mount 58 is adjusted by the alignment device 64. After alignment, the strut brackets 46, 58 are tightened again. They then hold the first and second stabilizing struts 30, 36 securely in the aligned one Position. Alternatively, an alignment device may also be provided on the first strut mount 46 or on both strut mountings 46, 58.

Fig. 2 shows a schematic diagram of a rear view of the embodiment according to Fig. 1 , The same components have the same reference numerals. In Fig. 2 is clearly the support rod 42 with the two cross members 44 recognize. With the cross members 44, the support rod 42 to the support rod 40, such as a mast, attached. In this case, the support rod 42 is aligned parallel to the support rod 40. Furthermore, in Fig. 2 the first reinforcing ring 21 of the reflector 12 for the first strut attachment 28 to recognize. For attachment of the reinforcing ring 21 existing fasteners, such as screws, threaded rods or bolts of the directional antenna 10 may be used.

The first, second, third and fourth support struts 48, 50, 60, 62 are arranged in this embodiment in parallel planes to each other and perpendicular to the support rod 40 and the support rod 42. In this case, the first and second support struts 48, 50 after Fig. 2 below the third and the fourth support strut 60, 62 attached to the support rod 40 or the support rod 42. The two spanned by the support struts 48, 50, 60, 62 triangles are therefore not in a plane. As a result, the fastening adapter device 38 is designed to be very stable against vibrations or twisting. Alternatively, one or more of the support struts 48, 50, 60, 62 may be secured to the support bar 40 or the support bar 42 at a different angle to the support bar 40 than the other support struts 48, 50, 60, 62.

The Befestigungsadaptervorrichtung 38 can be used quickly and without costly conversion measures in all standard directional radio antennas with a support for a rod-shaped support and at least one additional strut attachment and allows the triangular arrangement of the support struts a very stable and reliable attachment of directional antennas on a mast or other support rod ,

LIST OF REFERENCE NUMBERS

10

directional antenna

12

paraboloidal reflector

14

Reflector back

16

Side wall

18

front surface

20

Rod fixing

21

first reinforcing ring

22

second reinforcement ring

24

carrier

26

pole mount

28

first strut attachment

30

first stabilizing strut

34

second strut attachment

36

second stabilizing strut

38

Mounting adapter device

40

carrying bar

42

Handrail

44

crossbeam

46

first strut mount

48

first support strut

50

second support strut

52

Fastener with strut mount

54

Fastener at handrail

56

Fasteners for carrying rod

58

second strut mount

60

third support strut

62

fourth support strut

64

alignment device

Claims (7)

1. A fixing adapter device (38) for a directional antenna (10), comprising a holding rod (42) for fixing a holding rod fastening (20) of the directional antenna (10), a cross beam (44) for fixing the holding rod (42) on a support bar (40), a first (48) and a second (50) supporting struts as well as a first strut bracket (46) for fastening a first stabilising strut (30) of the directional antenna (10), wherein the first strut bracket (46) is rigidly connected to the holding rod (42) via the first supporting strut (48) and wherein the first strut bracket (46) is furthermore adapted to be connected to the support bar (40) via the second supporting strut (50).
2. A fixing adapter device (38) for a directional antenna (10) according to claim 1, characterized in that a second strut bracket for fastening a second stabilising strut (36) of the directional antenna (10) as well as a third (60) and a fourth (62) supporting struts are provided, wherein the second strut bracket is rigidly connected via the supporting strut (60) to the holding rod (42) and wherein the second strut bracket (58) is furthermore adapted to be connected to the support bar (40) via the fourth supporting strut (62).
3. A fixing adapter device (38) for a directional antenna (10) according to claim 2, characterized in that the first strut bracket (46) is essentially arranged opposite the second strut bracket (58) with respect to the longitudinal axis of the holding rod (42).
4. A fixing adapter device (38) for a directional antenna (10) according to any of the preceding claims, characterized in that at least one supporting strut (48, 50, 60, 62) is shaped like an angle iron.
5. A fixing adapter device (38) for a directional antenna (10) according to any of the preceding claims, characterized in that the longitudinal axis of the cross beam (44) is not arranged in a perpendicular manner with respect to the rear side of the directional antenna (10).
6. A fixing adapter device (38) for a directional antenna (10) according to any of the preceding claims, characterized in that the first and the second supporting struts (48, 50) and the cross beam are arranged in a triangular form.
7. A fixing adapter device (38) for a directional antenna (10) according to any of the claims 2 to 6, characterized in that the first supporting strut (48) and the third supporting strut (60) are each connected to the holding rod (42) at different positions with respect to the longitudinal axis of the holding rod (42) by means of a respective fastening means (54) and/or the second supporting strut (50) and the fourth supporting strut (62) are each connected to the support bar (40) at different positions with respect to the longitudinal axis of the support bar (40) by means of a respective fastening means (56).

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