Street pole, street lighting pole, lamp and method of manufacturing the same

Abstract

A street pole, comprising an antenna section having an antenna mounted coaxially around the pole. The antenna section has a length L and comprises at least one of the following features: - a suspension with an O-ring, wherein each O-ring is mounted at a distance Dr of 0.5*(1-½√2)*L from a respective end of the antenna; - a fixed suspension at the bottom; - a reduced outer diameter of the pole at at least one end of the antenna (i.e. the top and / or bottom end); and - one of i) an extruded cable sleeve with openings on its circumference over its entire length for easy assembly and spring mounting of the cable sleeve around the pole, and ii) a slotted pole with grooves of a specific shape for collecting residual particles at a preferred location.

Description

Technical Field

[0001] The invention relates to a mast or street pole comprising an antenna portion, a mast or street lighting pole with an integrated antenna, a luminaire and methods of manufacturing these. Background Art

[0002] More particularly, the invention relates to street lighting poles that have been modified to include telecommunication equipment (radio, antenna, cables) so that the street lighting pole also acquires wireless telecommunication functionality. Even more specifically, the field of the invention is about street lighting poles where the equipment is integrated within the outer surface of the pole with the purpose of shielding it from public view. This is known as a telecommunication smart pole.

[0003] The current state of the art of telecom smart poles includes a range of poles of different heights. These poles are available in different colours and can be fitted with different luminaires, with the aim of providing a family of smart poles that can be located at different locations in a public space and therefore have the widest market acceptance.

[0004] Since the smart street pole is arranged outdoors, it must be treated (i.e. provided with a protective coating) so that it can better withstand the ambient atmospheric conditions outdoors. This requires a coating process, which usually results in a blockage of the grooves in which the cables are to be accommodated. In addition, the smart pole street luminaire is provided with a 4G / 5G radio antenna as a cover fitted around the pole. A guiding cable sleeve is provided between the antenna and the pole. When loads (e.g. lifting or wind) cause the street pole to bend, this involves the problem of an increased risk of premature failure of the antenna system. Summary of the invention

[0005] The object of the present invention is to counteract the above mentioned problems. To this end, a street pole is provided as described in claim 1. In particular, in order to create a desired gap or bending space between a tubular antenna having a length L and the street pole on which the tubular antenna is mounted, at least one of the following mounting tolerance means is proposed as antenna mounting tolerance feature:

[0006] 1. ½√2 suspension with O-rings, where each O-ring is mounted at a distance Dr of 0.5*(1-½√2)*L±10% from the corresponding end of the antenna;

[0007] 2. A fixed suspension at the bottom and a flexible "suspension" at the top;

[0008] 3. Creating a bending space by a reduced outer diameter of the rod at the top and / or bottom end of the antenna;

[0009] 4. Extruded cable sleeve with openings on the circumference over its entire length to facilitate assembly and fit the cable sleeve around the rod spring, also providing more clearance;

[0010] 5. Concept of integrated improvement combining solutions 1-4.

[0011] Depending on the chosen configuration for obtaining the gap, specific gap ranges are preferred, namely:

[0012] - A gap range from 0.2 mm to 8 mm can be used for all solutions, e.g. when extruded cable sleeves are integrated in the rod;

[0013] - A gap range from 2 mm to 5.5 mm may be suitable for a limited set of solutions, such as when the sleeve is extruded with an axially extending opening circumferentially over the entire length of the sleeve;

[0014] - When an O-ring is used to mount the antenna, a gap range from 3 mm to 4.5 mm is preferably applicable.

[0015] These solutions will be discussed in more detail in the detailed description of the preferred embodiments. However, it is noted that each solution is generally applicable to various types of street pole embodiments, either alone or in any combination, i.e. not necessarily in combination with all other features of the illustrated embodiments. Furthermore, the street lighting pole may also be a simple pole without lighting functionality, i.e. just a simple street pole.

[0016] Within this concept, a number of modular components can be distinguished, which can be listed and explained below.

[0017] • Base: This module is used to locate telecommunication equipment that generates and receives radio frequency radio signals. Also, auxiliary equipment such as circuit breakers, power distribution and fiber management can be located at the base;

[0018] •Intermediate rod: This is the steel transition piece which can be ordered in different lengths to allow for a range of rod heights;

[0019] • Antenna part: The antenna part is the structural element of the pole and can carry the mechanical loads of the components mounted on it (e.g. lamps, spigots, arms) taking into account the direction of gravity;

[0020] • (Invisible) Antenna Cables: These are run through the mid-pole to connect the radio to the antenna, and will be different lengths for different mid-pole sizes;

[0021] •Luminaires with optional mounting arms: Poles can be combined with pole top luminaires and side mounts.

[0022] The current invention(s) overcome the problems occurring in the antenna section.

[0023] However, before mounting the antenna around the pole, the pole first has to be prepared for a long service life, i.e. it should be made more resistant to the corrosive atmosphere to which it is exposed during its service life. However, the manufacture of the inventive concept has its own manufacturability problems. For strength and rigidity, the antenna pole is made of high-grade steel, which in turn needs to be protectively coated (e.g. electroplated or dip-coated) to prevent it from corroding in the intended outdoor application environment. This coating process is not without its own problems. Therefore, the first part of the present invention is concerned with overcoming the disadvantages of the coating process for antenna poles having machined grooves on their periphery. For poles of this size, a relatively very cost-effective coating process is hot-dip coating, for example in a liquid bath of hot chrome or a much cheaper Zn-Fe alloy. This deposit is a thick layer of chromium or zinc-iron alloy on the steel surface. This is not a particularly well controlled process compared to the electroplating used in the automotive industry, where the surface finish of the substrate (steel sheet) is better and a thin layer is desired for further treatment with paint.

[0024] In the case of hot dip coating of antenna rods (especially a part of this size), residual particles will lodge in the grooves of the modified antenna rod, affecting the fit of the cable in the grooves not only in cross section but also over the length. Increasing the depth and width of the grooves and reducing the outer diameter of the antenna rod to account for the "residue" is undesirable because it defeats the purpose of the first part of the invention to increase the stiffness of the antenna rod. The main invention to overcome the coating residue problem is to create pockets and / or smaller axial grooves in the bottom of the axial main groove. Any residue caused by the hot dip coating process will now flow into these deeper lay-up pockets and / or grooves, and this limits the impact on the final size of the main groove.

[0025] Embodiments of the invention are provided that include machining, extrusion, V-grooving of pockets and / or grooves in the antenna tube, each with their practical manufacturing options.

[0026] The concept of the present invention - also called the Smart Fusion Pole concept - is unique in the way how the antenna is integrated into the whole system. The antenna is arranged around a hollow cylinder that slides over a support shaft (antenna pole) and is suspended to the pole, for example, by means of O-rings, wherein the O-rings are each mounted at a distance Dr of 0.5*(1-½√2)*L from the respective end of the antenna. Said distance Dr is not limited to its exact value of 0.5*(1-½√2)*L, but includes a small tolerance of + or -10% in said distance Dr. The advantage of this particular concept is that the antenna can work omnidirectionally without any mechanical part blocking a part of the signal. The antenna cable is laid between the antenna (located on the outer circumference of the cylinder) and the antenna pole (support shaft in the form of a hollow tube). The disadvantage of this concept is that stress is exerted on the delicate antenna equipment in case the antenna pole bends due to wind loads (there must be a light fixture on top of the Smart Fusion Pole to catch the wind).

[0027] Therefore, the second part of the present invention aims to overcome excessive bending within the size constraints of the overall slender concept of the smart fusion pole. In order to improve stiffness and bending resistance, a harder tube, a larger outer diameter and a larger wall thickness can be selected for the street pole (or at least the antenna part). As mentioned above, the cables are laid between the inside of the cylindrical antenna and the outer surface of the antenna pole. Increasing the outer diameter of the antenna pole is limited by the space that needs to be left for the cables. In order to maximize the outer diameter of the antenna pole and leave the maximum amount of material in the wall thickness, grooves are introduced in the outer surface of the antenna pole to accommodate the cables.

[0028] Various shapes of grooves are provided, each with its respective approach and advantages in dealing with the Zn residue problem. However, in general, the groove design that leaves the largest cross-sectional area (material) provides the best rigidity of the pole. Further, each cable does not necessarily have its own groove, alternatively / additionally, more cables are accommodated in a single groove, but the issue of symmetry with respect to the correct operation of the antenna is also an aspect to be considered, the higher the symmetry (e.g. uniform distribution of the antenna cables over the circumference of the pole), the better the pole should be able to resist bending in all directions as a default. When wind loads due to the luminaire design are also taken into account, some optimization may be done there. However, there may also be clustered groups of grooves, for example 4 clusters with 3 grooves.

[0029] Generally, the specific features of the present invention can be briefly described as follows by the following examples:

[0030] Example 1:

[0031] A street pole including an antenna portion around which a coaxial antenna is to be mounted, the antenna portion having a length L and including at least one of the following features:

[0032] - ½√2 suspension with O-rings, where each O-ring is mounted at a distance Dr of 0.5*(1-½√2)*L±10% from the respective end of the antenna;

[0033] - fixed suspension at the bottom;

[0034] - a reduced outer diameter of the rod at at least one end (ie the top and / or bottom end) of the antenna portion; and

[0035] - One of the following:

[0036] - an extruded cable sleeve with openings on its circumference over its entire length to facilitate assembly and mounting of the cable sleeve around the rod spring, and

[0037] - Slotted rod with specifically shaped axial grooves for collecting residual particles at a preferred location.

[0038] Example 2:

[0039] The street pole according to Example 1 is configured as a street lighting pole, further comprising an antenna installed around the antenna portion, a lamp portion, an intermediate pole portion and a base portion, wherein the order of adjacent portions interconnected from the base to the top is: base portion, intermediate pole portion, antenna portion and lamp portion.

[0040] Example 3:

[0041] A light fixture comprising a street pole according to Example 2, further comprising a cable extending through at least a core opening in the antenna portion and electronic equipment in the intermediate pole portion and / or the base portion, and configured to drive a light source housed (or to be housed) in the light fixture portion.

[0042] Example 4:

[0043] A method for manufacturing an antenna mast comprises the following steps:

[0044] - providing an antenna mast portion having an axial antenna cable guiding groove on the outer surface of the antenna mast portion over the entire length of the antenna mast portion, the groove having at least one of the following features:

[0045] - a sub-groove at the bottom of the groove;

[0046] - rectangular cross-section of the groove;

[0047] - V-shaped cross section of the groove;

[0048] - a trapezoidal cross-section, widening or tapering inwards from the outer surface of the rod; and

[0049] - the depth of the groove is 1.05 to 2 times, preferably at least 1.2 to 1.5 times, the width of the groove;

[0050] -Coat the antenna mast with an anti-corrosion coating.

[0051] Example 5:

[0052] A method for manufacturing an antenna mast comprises the following steps:

[0053] - coating the antenna mast with an anti-corrosion coating,

[0054] - Providing a cable sleeve comprising a groove around the antenna mast part by means of a clamp fit.

[0055] Example 6:

[0056] A method for manufacturing an antenna portion, comprising the following steps:

[0057] - manufacturing the antenna mast according to example 4 or 5;

[0058] -Install the antenna cable in the groove;

[0059] -Provide antenna installation tolerance device;

[0060] - Install the antenna onto the antenna mast. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The invention will now be further explained with the aid of the accompanying schematic drawings, in which:

[0062] Figure 1 A first embodiment of a street pole according to the invention is shown;

[0063] Figure 2A -B shows various groove shapes to counteract the shortcomings of the rod coating process;

[0064] Figure 3A -C shows the principle problem of antenna cracking due to the bending of the rod;

[0065] Figure 4A - B shows a cross section of an embodiment of a pole with a mounted antenna;

[0066] Figure 5A - B shows a perspective view of the pole without the antenna installed and with the antenna installed, respectively; and

[0067] Fig. 6A -E shows various embodiments for counteracting the antenna cracking problem. DETAILED DESCRIPTION

[0068] Figure 1 A first embodiment of a street pole is shown, which can be arranged outdoors (e.g. along a road). The street pole comprises:

[0069] • Base: This module is used to locate telecommunication equipment that generates and receives radio frequency radio signals. Also, auxiliary equipment such as circuit breakers, power distribution and fiber management can be located in the base;

[0070] •Intermediate rod: This is the steel transition piece which can be ordered in different lengths to allow for a range of rod heights;

[0071] • Antenna section: The antenna section is the structural element of the pole and can carry the mechanical loads of the components mounted on it (lamp, plug, arm);

[0072] • (Invisible) Antenna Cables: These are run through the mid-pole to connect the radio to the antenna, and will be different lengths for different mid-pole sizes;

[0073] •Luminaires with optional mounting arms: Poles can be combined with pole top luminaires and side mounts.

[0074] In more detail, Figure 1 A partially exploded elongated structure 1 is schematically depicted, comprising a mast 3 having at least one wall 5 around a hollow core 7 as a tubular body or intermediate pole portion 9 extending along a length axis 11. A base mast section / portion 13 of the wall of the tubular body is connected to a first mast section or antenna portion 23 on which an antenna is mounted. The antenna portion is further releasably connected to a second mast section or lamp portion 25. The tubular body in the figure is in the shape of a cylinder, but may alternatively be a hexagonal column or an irregular octagonal column, or an axially extending incomplete circumferential portion thereof, such as a semicircular portion. The elongated structure is embodied as a modular street light pole 200, and further a lamp housing 27 is mounted on the second mast section. There is a first vent 29 at the foot 17 of the street light pole, and a second vent 31 is provided in the base mast section 13, just below the first mast section. In the base mast section, electrical equipment 35 is provided, such as a radio device 37 or a lamp driver, for example to facilitate the function of an antenna arranged in the first mast section or to drive a lamp arranged in a lamp fixture part.

[0075] Figure 2A-B shows a solution to overcome the disadvantages of the Zn-Fe coating process for an antenna rod, namely a rod having a machined axial groove of a specific shape on its periphery close to the standard groove. For rods of this size, the most cost-effective galvanizing process is hot-dip galvanizing. By this immersion, a thick layer of zinc-iron alloy is deposited on the surface of the steel. This is not a particularly well controlled process compared to electroplating used in the automotive industry, where the surface finish of the substrate (steel sheet) is better and a thin layer is desired for further treatment with paint. In the case of hot-dip galvanized antenna rods (especially parts of this size), residual particles of Zn oxide and / or Zn-Fe oxide will stay in the groove of the modified antenna rod, affecting the fit of the cable in the groove not only in cross-section but also over the length. Increasing the depth and width of the groove and reducing the outer diameter of the antenna rod to account for the "residue" is undesirable because it goes against the intention of the first part of the invention to increase the rigidity of the antenna rod. The main feature of the present invention to overcome the problem of galvanizing residue is to create a pocket and / or smaller groove at the bottom of the main groove. Any residue due to the hot dip galvanizing process will now flow into these deeper laying pockets and / or grooves and this limits the impact on the final dimensions of the main groove. Figure 2A Other shapes of grooves may also offset the Zn residue accumulated in the grooves, or better confine the cables in the grooves and maximize the outer surface of the rod, which is beneficial to improve the bending strength (or rigidity) of the rod to reduce the bending (degree) of the rod. The groove 201 has at least one of the following features:

[0076] - a corresponding axial sub-groove 203 at the bottom of each axial groove;

[0077] - rectangular cross section 205 of the groove;

[0078] - V-shaped cross section of the groove;

[0079] a trapezoidal cross-section, the walls of which widen 209 or taper 211 inwardly from the outer surface 213 of the rod 215, for example, as indicated, each tapering wall 209, 211 makes an angle of 30° with the radial direction; and

[0080] The depth of the groove is 1.05 to 2 times, preferably at least 1.2 to 1.5 times, the width of the groove.

[0081] Figure 3AThe principle of the problem occurring with an antenna 301 is shown, which is fixed to a rod 303 only at the bottom end 309 by means of a fixing device 311 and is mounted around the rod 303 with a snug fit having only a small tolerance or clearance. When a load (e.g. lift or wind) causes the pipe to bend so as to exceed the fit clearance, the antenna or antenna cable will crack, causing the antenna system to fail, as the rod may exert excessive forces on the antenna due to its bending in the middle 313 of the antenna and / or contacting the antenna at one of the ends 307, 309. Figure 3B In -C, this problem is counteracted by suspending the antenna of length L by clamping it on a rubber O-ring 305 clamped around the rod 303, thus enabling a larger spacing S and in combination a favorable bending point at the O-ring. The distance between the O-rings is ½√2*L, and each O-ring is mounted at a distance D from the respective end 307, 309 of the antenna. r Preferably, each Dr is 0.5*(1-½√2)*L. However, when the distance D between the O-rings is maintained at ½√2*L, the corresponding Drs may be different from each other.

[0082] Figure 4A -B shows a cross-sectional view of a steel pipe as a rod 401 of the antenna part, respectively in the length direction ( Figure 4A ) and along DD in a direction transverse to the length direction ( Figure 4B ) where the antenna 403 is mounted around the pole. The antenna is shielded by an aesthetically pleasing barrier 405 to allow the antenna to fit unobtrusively onto the street pole light fixture.

[0083] Figure 5A -B shows a perspective view of a steel pipe as the rod 501 of the antenna part. Figure 5A There are no antennas mounted around the pole and in Figure 5B There is an antenna 503 mounted around a pole. The pole has an outer diameter 505 of 3.5 inches, a minimum wall thickness 507 at the groove 509 of 11.8 mm or 0.46 inches, and a wall thickness 511 of 19.050 mm or ¾ inches. It further has a central hole 513 through which a cable extends (cable not shown) for accommodating a light source (not shown) in a light fixture housing mounted at the top of the street pole. The pole is provided with an axial groove for accommodating the antenna cable 515. Further, a fixed suspension 517 is provided at the lower end or bottom end portion 519 of the pole (when the pole is arranged in an upright position along or on the street) for supporting / carrying the antenna when mounted around the pole, a rubber O-ring 521 is provided around the pole to provide spacing between the pole and the antenna to enable the pole to undergo some bending, and a bending space 523 is created by the reduced outer diameter of the pole at the top end 525 of the antenna.

[0084] Fig. 6AA first solution to the problem of how to counteract the rod bending is shown. Fig. 6A In FIG. 6 , this is achieved by suspending an antenna 601 having a length L by clamping it onto rubber O-rings 603 clamped around a rod 605. The distance D between the O-rings is ½√2*L, and the O-rings are each mounted at a distance Dr of 0.5*(1-½√2)*L from the respective bottom end 607 and top end 609 of the antenna.

[0085] Figure 6B A detailed view of the fixing suspension 611 to the pole 605 is shown, having a clamped, not completely closed first ring 613 with a bolt arrangement 615 which can be twisted to change the size of the first ring and thus clamp the suspension to the pole with claws 617 gripping the outer surface 625 of the pole. Connected to the first ring via a bridge 619 and carried by the first ring is a second ring 621 on which an antenna (not shown) is mounted and supported.

[0086] Figure 6C A detailed view of the curved space created by the indentation 623 in the outer surface 625 of the rod 605 is shown, resulting in a reduction in the outer diameter of the rod at the location of the bottom end 607 of the antenna 601, i.e., at the side of the antenna supported by the fixed suspension 611. Similarly, and additionally or alternatively, such an indentation in the outer surface of the rod may be provided at the top end location of the antenna 601.

[0087] Fig.6D A cross-sectional view of an extruded cable sleeve 627 having an axially extending opening 629 on the circumference is shown, providing more clearance between the antenna and the rod for ease of assembly and spring mounting the cable sleeve around the outer surface 625 of the rod 605 at the outer surface 625 of the rod 605. The spring mounted cable sleeve provides some flexibility to the antenna, thereby enabling it to handle the forces applied by the bending rod. Note that in this case, the rod itself does not have a groove, but rather a separate sleeve 627 is provided around the rod, which has a groove 631 for accommodating the antenna cable 633.

[0088] Fig. 6E A perspective view of an extruded cable sleeve 627 is shown having an axially extending opening 629 on its circumference extending over the entire length Ls of the cable sleeve, which is generally the same as the length L of the antenna (not shown) to facilitate assembly and spring mounting of the cable sleeve around the outer surface 625 of the rod 605. The antenna cable 633 is received in a groove (not shown) in the cable sleeve. In order to mount the antenna around the rod with the desired tolerance / spacing between the antenna and the rod and the antenna cable sleeve, the following features are provided:

[0089] - Rubber (or alternatively silicone or ductile metal) O-rings 603 are arranged around the sleeve, at a distance of ½√2*L from each other (L being the length of the antenna);

[0090] - a fixed suspension 611 at the bottom of the antenna (not shown) and a flexible "suspension" at the top of the antenna (not shown); and

[0091] - The bending space is created by a reduced outer diameter of the rod at the top and / or bottom end of the antenna (not shown).

[0092] It should be noted that the above embodiments illustrate rather than limit the present invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the spirit of the present invention. In the claims, any reference numerals placed between brackets shall not be construed as limiting the claims. The use of the verb "comprise" and its variations does not exclude the presence of elements or steps other than those stated in the claims. Unless the context clearly requires otherwise, throughout the specification and claims, the words "comprise", "include", etc. should be interpreted as inclusive, rather than exclusive or exhaustive; that is, as "including but not limited to". The article "one" or "an" in front of an element does not exclude the presence of multiple such elements. The present invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a device claim enumerating several means, several of these means may be embodied by one and the same hardware item. The mere fact that certain measures are listed in mutually different dependent claims does not indicate that a combination of these measures cannot be used advantageously.

[0093] The invention further applies to devices comprising one or more of the characterizing features described in the specification and / or shown in the drawings. The various aspects discussed in this patent may be combined to provide additional advantages. Further, it will be appreciated by those skilled in the art that embodiments may be combined, and more than two embodiments may also be combined. In addition, some features may form the basis of one or more divisional applications.

Claims

1. A street pole comprising an antenna portion having a length L and including antenna mounting tolerance features to enable a coaxial antenna to be mounted around the pole with at least a local gap in the range of 0.2 to 8 mm to provide bending space for the pole, in, The antenna portion includes at least one of the following antenna installation tolerance features for obtaining the bending space: - a suspension with O-rings, wherein each of the O-rings is mounted at a distance Dr of 0.5*(1-1 / 2√2)*L±10% from the respective end of the antenna; - a reduced outer diameter of the rod at the bottom and top ends of the antenna part; as well as - One of an extruded cable sleeve having openings on its circumference over its entire length for ease of assembly and elastic mounting of the cable sleeve around the rod and a slotted rod having an axial groove having features for collecting residual particles.

2. A street pole according to claim 1, wherein: The axial groove has at least one of the following features: - an axial sub-groove at the bottom of said groove; - a rectangular cross-section of the groove; - a V-shaped cross section of the groove; - a trapezoidal cross-section, widening or tapering inwards from the outer surface of the rod; and - The depth of the groove is 1.05 to 2 times the width of the groove.

3. A street pole according to claim 2, wherein: The depth of the groove is at least 1.2 to 1.5 times the width of the groove.

4. A street pole according to claim 1 or 2, wherein: The rod is a slotted rod having an axial groove and wherein the rod is provided with a protective coating of zinc-iron alloy or chromium via a hot dip coating process.

5. A street pole according to claim 1 or 2, wherein: The reduced outer diameter of the rod is an indentation in the outer surface of the rod, the indentation being arranged at the location of the bottom end and / or the top end of the antenna.

6. A street pole as claimed in claim 5, wherein: The bottom end and / or the top end of the antenna at least includes the top end of the antenna part.

7. The street pole according to claim 1 or 2, configured as a street lighting pole, further comprising an antenna, a lamp portion, an intermediate pole portion and a base portion mounted around the antenna portion, wherein: The order of adjacent parts connected to each other from the base to the top is: base part, middle rod part, antenna part and lamp part.

8. A street pole according to claim 1 or 2, wherein: The local gap is in the range of 2 to 5.5 mm.

9. A street pole as claimed in claim 8, wherein: The local gap is in the range of 3 to 4.5 mm.

10. A luminaire comprising a street pole according to claim 7, further comprising a cable extending at least through a core opening in the antenna portion and electronic equipment in the intermediate pole portion and / or the base portion, and configured to drive a light source housed or (to be) housed in the luminaire portion.

11. A method for manufacturing an antenna mast, comprising the following steps: - providing an antenna mast portion having an axial antenna cable guiding groove on the outer surface of the antenna mast portion over the entire length of the antenna mast portion, the groove having at least one of the following features for collecting residual particles: - an axial sub-groove at the bottom of said groove; - a rectangular cross-section of the groove; - a V-shaped cross section of the groove; - a trapezoidal cross-section, widening or tapering inwards from the outer surface of the rod; and - the depth of the groove is 1.05 to 2 times the width of the groove; - coating the antenna mast portion with an anti-corrosion coating. 12 . The method of claim 11 , wherein the depth of the groove is at least 1.2 to 1.5 times the width of the groove.

13. A method for manufacturing an antenna portion, comprising the steps of: - manufacturing the antenna mast according to claim 11 or 12; -Install the antenna cable in the groove; -Provide antenna installation tolerance device; - Mounting the antenna on the antenna mast.

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