ONE-PART ANTENNA CORE

Abstract

A 3D antenna including three coil windings arranged substantially orthogonal to one another and made from electrically conductive wire and ferromagnetic antenna core with coil regions for receiving the coil windings. Winding-on points for starting to wind the wire onto the antenna core are formed as a single part with the antenna core.

Claims

1. A 3D antenna having three essentially mutually orthogonally arranged coil windings of electrically conductive wire and a ferromagnetic antenna core with coil regions for accommodating the coil windings, wherein winding-on points for winding on the wire onto the antenna core are formed in one piece with the antenna core.

2. The 3D antenna as claimed in claim 1, wherein the antenna core is in the form of a one-piece hollow core.

3. The 3D antenna as claimed claim 1, wherein the coil windings are parts of antenna windings which have wire bindings and at least one transition winding for connecting the coil winding to one of the wire bindings.

4. The 3D antenna as claimed in claim 1 wherein the winding-on points are stud-shaped with a U-shaped cross-section.

5. The 3D antenna as claimed in claim 1 wherein the antenna core has at least one production-supporting geometry including a stud, a groove, a notch and/or a recess.

6. The 3D antenna as claimed in claim 1, wherein the antenna core has a centering aid including a centering groove arranged diagonally and/or on an underside of the antenna core.

7. The 3D antenna as claimed in claim 1, wherein at least one transition winding of the wire runs partially under one of the coil windings.

8. The 3D antenna as claimed in claim 1, wherein the antenna core has a guide region for guiding the wire to one of the coil regions and under one of the coil windings on the antenna core side.

9. The 3D antenna as claimed in claim 8, wherein the guide region has at least two guide sections.

10. The 3D antenna as claimed in claim 1, wherein protrusions, including core feet, bound the coil regions in at least one direction.

11. The 3D antenna as claimed in claim 1, wherein at least one of the coil regions is formed in the manner of a coil channel.

12. The 3D antenna as claimed in claim 1, wherein the antenna core is made of sintered ferrite.

13. The 3D antenna as claimed in claim 1, wherein at least one wire binding is metallizedon the underside of the antenna core.

14. A method for producing a 3D antenna having three essentially mutually orthogonally arranged coil windings of electrically conductive wire and a ferromagnetic antenna core with coil regions for accommodating the coil windings wherein the wire is wound onto winding-on points formed in one piece with the antenna core.

15. The method as claimed in claim 14, wherein a winding device engages in a notch at a corner of the antenna core during winding of at least one antenna winding.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Further details and advantages of a 3D antenna according to an embodiment and a method for producing such a 3D antenna will be explained below by way of example on the basis of the exemplary embodiments schematically presented in the figures. In the figures:

[0067] FIG. 1a shows a view of a first embodiment of an antenna core of a 3D antenna;

[0068] FIG. 1b shows another view of a first embodiment of an antenna core of a 3D antenna;

[0069] FIG. 1c shows another view of a first embodiment of an antenna core of a 3D antenna;

[0070] FIG. 1d shows another view of a first embodiment of an antenna core of a 3D antenna;

[0071] FIG. 1e shows another view of a first embodiment of an antenna core of a 3D antenna;

[0072] FIG. 2 shows a perspective view of the antenna core in the region of a notch;

[0073] FIG. 3 shows a perspective view from diagonally below to the antenna core according to FIGS. 1a-1e;

[0074] FIG. 4 shows a perspective view from diagonally above to the antenna core according to FIGS. 1a-1e;

[0075] FIG. 5a shows a view of a 3D antenna with an antenna core according to a second embodiment;

[0076] FIG. 5b shows another view of a 3D antenna with an antenna core according to a second embodiment;

[0077] FIG. 5c shows another view of a 3D antenna with an antenna core according to a second embodiment;

[0078] FIG. 5d shows another view of a 3D antenna with an antenna core according to a second embodiment;

[0079] FIG. 5e shows another view of a 3D antenna with an antenna core according to a second embodiment;

[0080] FIG. 6 shows a perspective view from diagonally below to the antenna core according to FIGS. 5a-5e;

[0081] FIG. 7 shows a perspective section of the 3D antenna according to FIGS. 5a-5e in the region of a notch with a hidden coil winding;

[0082] FIG. 8a shows a view of the 3D antenna according to FIGS. 5a-5e in the region of the notch with a partial coil winding;

[0083] FIG. 8b shows another view of the 3D antenna according to FIGS. 5a-5e in the region of the notch with a partial coil winding;

[0084] FIG. 9 shows a perspective view of the 3D antenna according to FIGS. 5a-5e in the region of winding-on points; and

[0085] FIG. 10 shows a perspective view of the winding-on points according to FIG. 9 from a perspective from diagonally below.

DETAILED DESCRIPTION

[0086] 3D antennas 100 are used for receiving and/or transmitting electromagnetic signals in various devices, in particular in the mobile radio range. For this purpose, such 3D antennas 100 have three essentially mutually orthogonally arranged coil windings 101.2, 102.2, 103.2 of electrically conductive wire 111, 112, 113, which are wound around a ferromagnetic antenna core 1.

[0087] In FIG. 1 to FIG. 4, a first embodiment of an antenna core 1 for such a 3D antenna 100 is shown. In order to be able to better recognize the individual features of the antenna core 1, no antenna windings 101, 102, 103 are initially shown in these figures.

[0088] FIG. 1 shows the essentially cube-shaped antenna core 1 from different perspectives along the x-axis X, y-axis Y and z-axis Z of the antenna core 1. FIG. 1a shows a view of an outer side 1.3 of the antenna core 1 along the y-axis Y. Compared to FIG. 1a, FIG. 1b is rotated by 90° around the x-axis X and shows the topside 1.1 of the antenna core 1. Compared to FIG. 1a, the antenna core 1 in FIG. 1c is rotated by 90° around the z-axis Z, so that it shows the outer side 1.3 of the antenna core 1 along the z-axis Z. Starting from FIG. 1c, the antenna core 1 for the view according to FIG. 1d is again rotated by 90° around the z-axis Z, so that in this the outer side 1.3 of the antenna core 1 opposite to FIG. 1a along the y-axis Y is shown. Starting from the representation in FIG. 1c, the antenna core 1 in the view according to FIG. 1e is rotated by 90° around the y-axis Y, so that in FIG. 1e the underside 1.2 of the antenna core 1 is shown.

[0089] In the underside edge region of the outer sides 1.3, the antenna core 1 has winding-on points 11, onto which the wires 111, 112, 113 of which the coil windings 101.2, 102.2, 103.2 consist can be wound for fastening. The winding-on points 11 are formed in one piece with the antenna core 1. The use of additional supporting bodies, frames or circuit boards for fastening the wire 111, 112, 113 can thus be dispensed with. The winding-on points 11 are stud-shaped, wherein they protrude along one of the axes X, Y from the outer sides 1.3 of the antenna core 1.

[0090] The winding-on points 11 of the antenna core 1 are formed by two winding-on point types 11a, 11b of slightly different geometry. A first winding-on point type 11a tapers along the direction away from the antenna core 1 along a longitudinal axis LA1 of the winding-on point 11, as can be seen in particular in FIG. 1b. This winding-on point type 11a has a fold 11.3 running to its end region and closing it towards the outside of the antenna core. This winding-on point type 11a is particularly suitable for winding on the region of the wire 111, 112.1, 113.1 adjoining the starting end of the wire 111, 112, 113.

[0091] The second winding-on point type 11b, on the other hand, widens along a longitudinal axis LA2 of the winding-on point 11 away from the antenna core 1, as can also be seen in FIG. 1b. With this type of winding-on point 11b, it is not necessary to provide for a fold 11.3, but this winding-on point type 11b may also have such a fold 11.3.

[0092] The winding-on points 11 are distributed along the circumference of the antenna core 1 and arranged in a common plane in the manner of a trunnion. In order to enable particularly simple winding on of the wire 111, 112, 113 at the winding-on points 11, the winding-on points 11 along the x-axis X or the y-axis Y to the outside of the antenna are the outermost parts of the antenna core 1. For this purpose, the winding-on points 11 are arranged on core feet 10. The core feet 10 in the form of protrusions are arranged at the corners of the underside 1.2 of the antenna core 1 and form both protrusions of the underside 1.2 and the respective outer sides of the antenna core 1 adjacent to these corners 1.3.

[0093] In order to receive the wire 111, 112, 113 during winding on, the winding-on points 11 have circumferential grooves 11.2 running along their circumference. In the case of winding-on point type 11a, this circumferential groove 11.2 is bounded on one side by the fold 11.3 and on the other side by the core foot 10. This results in an essentially rectangular circumferential groove 11.2.

[0094] With the winding-on point type 11b, the circumferential groove 11.2 is also bounded on one side by the core foot 10. The remaining boundary of the circumferential groove 11.2 results from the outwardly widening shape of the winding-on point 11. In this way, a circumferential groove 11.2 with an essentially triangular cross-section is achieved.

[0095] The winding-on points 11 which point to the outside of the antenna core have an essentially U-shaped cross-section along the circumferential groove 11.2 and transversely to their longitudinal axes LA1, LA2. With its U-shaped cross-section, the winding-on point 11 surrounds a slot-shaped winding-on recess 11.1. The wire 111, 112, 113 wound on the winding-on point 11 is pressed into this winding-on recess 11.1. In this way, the winding-on recess 11.1 acts as a trap for the wire 111, 112, 113. This results in a more secure attachment of the wire 111, 112, 113 to the antenna core 1.

[0096] In addition to the core feet 10, the antenna core 1 also has further protrusions in the manner of edge posts 3 along the edges 1.5 of adj acent outer sides 1.3 of the antenna core 1. These edge posts 3 run along the edges of the antenna core 1 running parallel to the z-axis Z. The edge posts 3 serve to stabilize the antenna core 1, which is in the form of a hollow core.

[0097] In the direction of the underside 1.2, the edge posts 3 merge into the core feet 10. Based on the edge posts 3, the core feet 10 have larger dimensions, so that the core feet 10 represent a protrusion relative to the edge posts 3.

[0098] As can also be seen in FIGS. 3 and 4, the antenna core 1 is in the form of a hollow core with open surfaces at the topside 1.1 and on the underside 1.2. To stabilize the antenna core 1, it has a stabilization floor 2 arranged between the topside 1.1 and the underside 1.2, which runs parallel to the topside 1.1 and the underside 1.2. This stabilizing floor 2 is arranged in the middle of the antenna core 1, i.e. at half the distance between topside 1.1 and underside 1.2. The stabilizing bottom 2 contributes to the stiffness of the outer sides 1.3 of the antenna core 1 against deformations directed towards the inside of the antenna core.

[0099] FIG. 1b and FIG. 1e allow a view of the interior of the antenna core 1 through the open topside 1.1 and underside 1.2, respectively. Between the outer sides 1.3 and the inner sides 1.4, the antenna core 1 has a minimum wall thickness S in the range of 1 to 3 mm, in particular of 1.5 mm. To stabilize the antenna core 1 in areas in which, for example, there are recesses or notches 6 on the outer side 1.3, the inner side 1.4 has an inner protrusion 8 directed towards the inside of the antenna core. With this inner protrusion 8 in the form of a displacement towards to the inside of the antenna core, a minimum wall thickness S is ensured or maintained.

[0100] In addition to the core feet 10 and the edge posts 3, the antenna core 1 has several coil regions 4, 5, 9. The coil windings 101.2, 102.2, 103.2 are wound on these coil regions 4, 5, 9 and are thus accommodated by the coil regions 4, 5, 9.

[0101] The coil region 9 running along the z-axis Z is bounded on one side towards the underside 1.2 by the core feet 10. Towards the topside 1.1, the coil region 9 runs from the core feet 10 to a guide region 7, which is described in more detail below.

[0102] The other two coil regions 4, 5 are formed in the manner of coil channels. These coil channel-like coil regions 4, 5 are composed of several channel recesses 4.1, 4.2, 4.3, 5.1, 5.2, 5.3. These channel recesses 4.1, 4.2, 4.3, 5.1, 5.2, 5.3 are lower lying regions of the topside 1.1, the underside 1.2 and/or the outer sides 1.3 of the antenna core 1. These channel recesses 4.1, 4.2, 4.3, 5.1, 5.2, 5.3 are bounded on their sides and thus form a channel along which the wire 111, 112, 113 can be guided during winding of the coil windings 101.2, 102.2.

[0103] The channel recesses 4.3, 5.3 running along the z-axis Z of the antenna core 1 are formed between the edge posts 3 and the core feet 10, which bound the channel recesses 4.2 and 5.2 along the x-axis X and the y-axis Y, respectively. The antenna core 1, which is in the form of a hollow core, has a minimum wall thickness S in the range of 1 to 3 mm in these channel recesses 4.3, 5.3.

[0104] There are respective further channel recesses 4.2, 5.2 on the underside 1.2 of the antenna core 1 between each two adjacent channel feet 10. In these channel recesses 4.2, 5.2, the coil winding 101.2, 102.2 can be guided along the underside 1.2 of the antenna core 1.

[0105] Corresponding channel recesses 4.1, 5.1 can also be found on the topside 1.1 of the antenna core 1. These channel recesses 4.1, 5.1 extend between two adjacent edge posts 3. The coil winding 101.2 or 102.2 can be guided along the topside 1.1 of the antenna core 1 by two mutually aligned channel recesses 4.1 or 5.1.

[0106] The channel recesses 4.1, 4.2, 4.3 and the channel recesses 5.1, 5.2, 5.3 together form a coil region 4 and 5 respectively, which extends circumferentially around the antenna core 1. The coil regions 4 and 5 run essentially orthogonally to each other, so that the coil windings 101.2, 102.2 are also essentially orthogonally oriented relative to each other.

[0107] The orthogonal coil windings 101.2, 102.2 intersect when passing through the two coil regions 4, 5 on the topside 1.1 and the underside 1.2 of the antenna core 1. However, a reciprocal penetration of the coil windings 101.2 and 102.2 is not desired in terms of fabrication or for later operation. For this reason, the coil regions 4, 5 are designed in such a way that they lead the coil windings 101.2, 102.2 along the topside 1.1 and the underside 1.2 with an axial offset to each other along the z-axis Z. As can be seen in particular in FIGS. 1a, 1c and 1d, the channel recesses 5.1 and 5.2 are made less deep for this purpose than the channel recesses 4.1 and 4.2. In this way, the coil winding 101.2, which is the first of the coil windings 101.2, 102.2, 103.2 wound around the antenna core 1, is guided along the channel recesses 4.1 and 4.2 closer to the center of the antenna core 1. The coil winding 102.2 guided in the channel recesses 5.1, 5.2, which is wound only after the coil winding 101.2 and the antenna core 1, is wound in this way along the z-axis Z seen above the coil winding 101.2. Due to the shallower channel recesses 5.1 and 5.2 compared to the channel recesses 4.1 and 4.2, the coil winding 102.2 is nevertheless supported by the channel recesses 5.1 and 5.2 of the antenna core 1, so that the coil winding 102.2 does not exert any force on the coil winding 101.2 which is located below it on the antenna core side along the z-axis Z. The difference in the depth of the channel recesses 5.1, 5.2 relative to the channel recesses 4.1 and 4.2 is in the range of the diameter of the wire 111 used, so that despite this difference of the coil regions 4, 5, the coil windings 101.2 and 102.2 can be substantially the same.

[0108] In order to protect or safeguard the wire 111, 112, 113 against damage when winding on the antenna core 1, the edges 1. Of the antenna core 1 are deburred. In particular in the coil regions 4, 5, 9, in which the wire 111, 112, 113 of the coil windings 101.2, 102.2, 103.2 is wound over edges 1.5, this deburring can be seen in the figures as a chamfer or a rounding of the edges 1.5.

[0109] In addition to the geometries already described, the antenna core 1 has other production-supporting geometries, which can be seen in particular in FIGS. 1d, 1e to FIG. 4. These production-supporting geometries serve to improve automation in the production of the 3D antenna 100 and at the same time allow higher precision in its production.

[0110] On the underside 1.2 of the antenna core 1 there are again three centering grooves 15. These are arranged on the underside 1.2 of the core feet 10 and run from the corners of the underside 1.2 inwards towards the middle of the underside 1.2. Two centering grooves 15 arranged at diagonally opposite corners of the underside 1.2 are formed to be aligned with each other so that together they form a diagonal groove.

[0111] Since there is no material of the antenna core 1 in the region between the core feet 10 due to the design of the antenna core 1 as a hollow core with an open underside 1.2, this diagonal centering groove 15 can only be formed section-by-section as a diagonal groove.

[0112] The centering grooves 15 are designed in such a way that they can be held as a centering aid by a centering means of a winding device when winding the wire 111, 112, 113. It may be provided that not all centering grooves 15 are used as a centering aid at the same time. For example, a respective centering groove 15 can interact with a corresponding centering means for centering the antenna core 1 during the winding of a single wire 111, 112, 113. In this way, a centering groove 15 can be used for centering during winding of one of the total of at least three coil windings 101.2, 102.2, 103.2. In particular, for winding the wire 113, the centering grooves 215 can hold the coil core 7 at a position in the plane of the x-axis X and y-axis Y. The antenna core 1 can be repositioned after winding each of the coil windings 101.2, 102.2, 103.2 in the winding device, wherein then a different centering groove 15 is used to center the antenna core 1 and interacts with the centering means.

[0113] Several receiving grooves 12, each of which can accommodate a starting end of a wire 111.1, 112.1, 113.1, are provided on the underside 1.2 of the antenna core 1. The receiving grooves 12 are implemented underneath the core feet 10. Each of these receiving grooves 12 is associated with a winding-on point 11. The receiving groove 12 is oriented in such a way that the wire 111, 112, 113, whose starting end 111.1, 112.1, 113.1 is received by the receiving groove 12, is guided towards the winding-on point 11 associated with it. The receiving groove 12 is essentially arranged at an angle to a centering groove 15 which is arranged near it.

[0114] Guide grooves 13 are also arranged on the underside 1.2 of the antenna core 1 and are each associated with a winding-on point 11. The guide grooves 13 are implemented underneath the core feet 10. These winding-on points 11 associated with the guide groove 13 are those winding-on points 11 with which a receiving groove 12 is also associated. Half of the winding-on points 11 are thus associated with both a guide groove 13 and a receiving groove 12. By means of the guide groove 13, a wire 111, 112, 113 coming from the winding-on point 11 can be guided over the starting end of the wire 111.1, 112.1, 113.1 located in the receiving groove 12 to fix it. Furthermore, the wire 111, 112, 113 in the guide groove 13 is guided from the winding-on point 11 towards the coil region 4, 5, 9. Slipping of the wire 111, 112, 113 on the underside 1.2 of the antenna core 1 is thus avoided.

[0115] The winding-on points 11, with which neither a guide groove 13 nor a receiving groove 12 is associated, is associated with a guide groove 14 on the underside 1.2 of the antenna core 1. The guide grooves 14 are implemented underneath the core feet 10. These guide grooves 14 are used to guide the wire 111, 112, 113 away from the coil region 4, 5, 9 to the respective winding-on point 11.

[0116] The guide grooves 14 are associated in the exemplary embodiment shown with the winding-on points 11 of the winding-on point type 11b, while the guide grooves 13 and the receiving grooves 12 are associated with the winding-on points 11 of the winding-on point type 11a.

[0117] The antenna core 1 has a notch 6 at a corner of one of the edge posts 3. This notch 6 is used for engagement by a winding device in order to be able to guide the coil winding 103.2 running parallel to the z-axis Z as close as possible along the surface of the coil region 9 during winding. The notch 6 essentially includes or consists of two surfaces 6.1, 6.2 arranged at an angle to each other. The surface 6.1 runs along the z-axis Z of the antenna core 1 from the topside 1.1 towards the underside 1.2 and inclined to the outside of the antenna core. In this way, the notch 6 in the upper region of the antenna core 1 is deeper than further towards the underside 1.2. The second side 6.2 of the notch 6 is additionally twisted around the z-axis Z relative to the first side 6.1. The second surface 6.2 is shorter along the z-axis Z than the first surface 6.1, so that the notch 6 tapers along the z-axis Z towards the underside 1.2.

[0118] In an end region of the notch 6 bearing towards the underside 1.2, a guide region 7 is provided, which can be seen in particular in FIG. 2 to FIG. 4. This guide region 7 is divided into several guide sections 7.1, 7.2, 7.3 and is essentially L-shaped or hook-shaped. The guide region 7 serves to guide the wire 113 from the winding-on point 11 to the upper end of the coil region 9, which is bounded by the guide section 7.2 along the z-axis Z towards the topside 1.1. The guide sections 7.1, 7.2 of the guide region 7 have an inclination directed towards the inside of the antenna core. Apart from this inclination directed towards the inside of the antenna core, the first guide section 7.1 essentially runs along the z-axis Z with a small angular offset in the range less than 10°. The second guide section 7.2 essentially runs in an x-y plane parallel to the x-axis X and the y-axis Y. In this x-y plane, the second guide section 7.2 is inclined towards the inside of the antenna core.

[0119] To deburr the edge between the guide sections 7.1, 7.2, the guide region 7 has a third, short guide section 7.3. This guide section 7.3 is essentially in the form of a type of chamfer. In the region of this guide section 7.3, the guide region 7 additionally has a nose 7.4, which protects a wire 113 guided along the guide section 7.3 against slipping.

[0120] Before winding the coil winding 103.2 around the coil region 9, the wire 113 is guided along the guide region 7 from the winding-on point 11 to the coil region 9. In order to guide the wire 113 along the guide region 7, a winding device engages in the notch 6, at the lower end of which the guide region 7 adjoins.

[0121] FIGS. 5a to 5e show a 3D antenna 100 with an antenna core 1 of a further embodiment, which, unless otherwise described below, has the same design and functional features as the first embodiment. The respective perspectives of FIGS. 5a to 5e as well as the orientations of the axes X, Y, Z of the 3D antenna 100 correspond to those perspectives and orientations of the axes X, Y, Z as they have already been described above for the antenna core 1 in FIG. 1.

[0122] Unlike the antenna core 1 shown in FIG. 1, the antenna core 1 in FIG. 5 is wound with electrically conductive wire 111, 112, 113, so that an entire 3D antenna 100 is represented here. The coil windings 101.2, 102.2, 103.2 each form a part of an antenna winding 101, 102, 103, each of which has a wire binding 101.1, 102.1, 103.1 in its start and end regions. In addition, transition windings 101.3, 102.3, 103.3 belong to the antenna windings 101, 102, 103 for connecting the coil windings 101.2, 102.2, 103.2 to one of the wire bindings 101.1, 102.1, 103.1.

[0123] During the production of the 3D antenna 100, a first wire 111 is first wound onto one of the winding-on points 11, the wire 111 with a transition winding 101.3 is guided to the coil region 4, the coil winding 101.2 is wound, the wire 111 with a further transition winding 101.3 is guided to a second winding-on point 11 and then a second wire binding 101.1 is wound on at the second winding-on point 11. Subsequently, analogously, winding on of the second wire 112 at a winding-on point 11 is carried out by making a first wire binding 102.1 of this antenna winding 102, before the coil winding 102 is then also wound and the wire 112 is wound onto another winding-on point 11. Likewise, the winding on of the third wire 113 at a winding-on point 11 is carried out with a wire binding 103.1, then winding of the coil winding 103.2 is carried out and final winding of the wire 113 is carried out at another winding-on point 11 with a wire binding 101.1.

[0124] For producing these antenna windings 101, 102, 103 the antenna core 1 also has centering grooves 15 on its underside 1.2. These centering grooves 15 are oriented in pairs along the diagonals of the underside 1.2 and aligned with each other, so that each centering groove pair forms an interrupted, section-by-section diagonal groove. The two pairs, each forming a diagonal centering groove 15, are essentially arranged perpendicular to each other, so that as a whole they form a crossed groove for centering the antenna core 1.

[0125] The centering grooves 15, as shown in FIG. 5e, are not covered by the wire 111, 112, 113 of one of the antenna windings 101, 102, 103. Therefore, the centering grooves 15 can center the antenna core 1 not only during the production of the antenna windings 101, 102, 103, but can also be used to center the entire 3D antenna 100 during the installation thereof. For this purpose, the centering grooves 15 can engage with appropriate centering means, for example protrusions of a circuit board on which the 3D antenna 100 is to be installed.

[0126] FIG. 5c shows one of the transition windings 103.3 of the antenna winding 103, which extends diagonally from the coil winding 103.2 over one of the outer sides 1.3 of the antenna core 1 towards the wire binding 103.1 wound around a winding-on point 11. The antenna winding 103 has a further transition winding 103.3, which however is largely covered by the coil winding 103.2 in FIG. 5d. This second transition winding 103.3 will be explained in more detail below in connection with FIG. 7 and FIG. 8.

[0127] FIG. 5e shows the corresponding starting ends of wires 111.1, 112.1, 113.1 accommodated in the receiving grooves 12, as well as the wires 111, 112, 113 of the transition windings 101.3, 102.3, 103.3 in the guide grooves 13 and 14. The receiving grooves 12 and the guide grooves 13 and 14 are formed analogously to those shown in FIG. 1.

[0128] FIG. 6 shows the guidance of the wires 111, 112, 113 on the underside 1.2 of the antenna core 1 and thus the underside 1.2 of the 3D antenna 100 in more detail. As can be seen, the starting end of the wire 111.1, 112.1, 113.1 is accommodated in the receiving groove 12. The wire 111, 112, 113 is guided from there towards the winding-on point 11 and is wound around its circumferential groove 11.2 in order to produce the wire binding 101.1, 102.1, 103.1 of the antenna winding 101, 102, 103 in this way. The wire 111, 112, 113 coming from the winding-on point 11 then forms a transition winding 101.3, 102.3, 103.3. This transition winding 101.3, 102.3, 103.3 is wound over the starting end of the wire 111.1, 112.1, 113.1 accommodated in the receiving groove 12 and guided through a guide groove 13 towards the coil region 4, 5, 9. Due to this wire guidance of the transition winding 101.3, 102.3, 103.3, the starting end of the wire 111.1, 112.1, 113.1 is reliably fixed in the receiving groove 12. Due to the wire binding 101.1, 102.1, 103.1 and the fixing of the starting end of the wire 111.1, 112.1, 113.1, the wire 111, 112, 113 is reliably attached to the antenna core 1.

[0129] In order to be able to establish an electrically conductive connection of the wire 111, 112, 113 and thus the coil windings 101.2, 102.2, 103.2 to a circuit in which the 3D antenna 100 is installed when installing the 3D antenna 100, the wire 111, 112, 113 can be metallized in particular in the antenna underside region of the wire bindings 101.1, 102.1, 103.1. This is not shown in the figures shown for reasons of better visibility of the wire guidance. In addition to the wire bindings 101.1, 102.1, 103.1, the starting ends of the wires 111.1, 112.1, 113.1 as well as the regions of the transition windings 101.3, 102.3, 103.3 located on the underside 1.2 can also be metallized.

[0130] The wire guidance in the region of the winding-on points 11, around which the wire bindings 101.1, 102.1, 103.1, which complete the antenna winding 101, 102, 103 production, are wound only after the completion of the coil windings 101.2, 102.2, 103.2, differs slightly from the wire guidance in the region of the winding-on point 11 associated with a receiving groove 12 for the starting end of the wire 111.1, 112.1, 113.1. Such a wire binding 101.1 produced to complete the antenna winding 101 is shown in the rear region of the 3D antenna 100 shown in perspective in FIG. 6. There, the wire guidance of the wire 111 of the transition winding 101.3 on the underside 1.2 takes place only in the guide groove 14 towards the wire binding 101.1. The wire end 111.2 is not received there in a receiving groove 12, but, as cannot be seen in FIG. 6, is received by the winding-on recess 11.1 of the winding-on point 11.

[0131] While the transition windings 101.3, 102.3 of the antenna windings 101, 102 running along the x-axis X or y-axis Y are comparatively short, the antenna winding 103 has a comparatively longer transition winding 103.3 from the wire binding 103.1 at the winding-on point 11 associated with the receiving groove 11 to the coil winding 103.2 wound around the coil region 9. This transition winding 103.3 runs partially under the coil winding 103.2 of the same antenna winding 103. This is shown in more detail in FIG. 7.

[0132] FIG. 7 does not show the coil winding 103.2 around the coil region 9. This corresponds to a state during the production of the 3D antenna 100 in which the two antenna windings 101 and 102 have already been completely wound on the antenna core 1, but of the antenna winding 103 initially only the wire binding 103.1 has been wound around the winding-on point 11 and the transition winding 103.3 from this first wire binding 103.1 to the coil region 9 has been completed.

[0133] As can be seen, the wire 113 in the transition winding 103.3 is initially guided away from the underside 1.2 essentially parallel to the z-axis Z of the 3D antenna 100. The wire 113 of the transition winding 103.3 is guided via the guide region 7 to the coil region 9 of the antenna core 1. The wire 113 rest against the nose 7.4, which holds it in position. Due to the course of the guide section 7.1 already described above pointing towards the inside of the antenna core and the course of the guide section 7.2 leading out again, the wire 113 of the transition winding 103.3 is guided over the guide region 7 essentially in the manner of an arc along a curvature of the surface of the antenna core 1. This guidance makes it possible for the coil winding 103.2 to be wound over the coil region 9 and over the transition winding 103.3 guided through the guide region 7. The transition winding 103.3 is additionally secured by the coil winding 103.2 in this way during the production of the 3D antenna 100, so that it cannot detach, which could otherwise lead to unwinding of the antenna winding 103.

[0134] In FIG. 8a and FIG. 8b, this guidance of the wire 113 over the guide region 7 is shown from different perspectives. In particular in FIG. 8a, the guidance of the wire 113 of the transition winding 103.3 in the manner of an arc inside the antenna can be clearly seen. FIG. 8 also shows the coil winding 103.2, which additionally fixes the transition winding 103.3, in a not finally completed state.

[0135] FIG. 8 also shows the notch 6 with the two surfaces 6.1 and 6.2, which allows engagement by a winding device for guiding the wire 113 of the transition winding 103.3 over the guide region 7. In the region of the notch 6, the inner side 1.4 of the antenna core 1 has an inner protrusion 8, which serves the additional stabilization of the antenna core 1 in the region of the notch 6. Since material of the antenna core 1 for making the notch 6 is removed or is not present from the beginning, there would be a decrease of the wall thickness S of the antenna core 1 in the region of this notch 6. This is compensated by the additional antenna core material of the inner protrusion 8.

[0136] FIG. 9 and FIG. 10 again show winding-on points 11 of the 3D antenna 100. These winding-on points 11 are those winding-on points 11 around which the wire bindings 101.1, 102.1, 103.1 terminating the antenna windings 101, 102, 103 are wound with the corresponding wire ends 111.2, 112.2, 113.2. The wire guidance of the wires 111, 112, 113 corresponds to the wire guidance of the corresponding wire binding 101.1 already described in connection with FIG. 6.

[0137] FIG. 10 shows once again the guidance of the wire 111 in the region of the transition winding 101.3 coming from the coil winding 101.2 to the wire binding 101.1. The wire 111 of the transition winding 101.3 initially coming from the coil winding 101.2 is guided essentially along the z-axis Z towards the underside 1.2. There, the transition winding 101.3 is guided via the guide groove 14 introduced in the core foot 10 to the winding-on point 11. The wire 111 is wound around the winding-on point 11 in the circumferential groove 11.2 thereof, so that the wire binding 101.1 is guided.

[0138] As shown in FIG. 9 and already in FIG. 8a, in the wire bindings 101.1, 101.2, 101.3 that terminate the antenna windings 101, 102, 103, the respective wire end 111.2, 112.2, 113.2 is received by the winding-on recess 11.1 of the winding-on point 11. For this purpose, the wire end 111.2, 112.2, 113.2 is bent into the slot-shaped winding-on recesses 11.1 formed by the U-shaped winding-on points 11.

[0139] As can be seen, the wire bindings 101.1, 102.1, 103.1 are formed in the manner of open wire bindings. The wire 111, 112, 113 is first wound around the winding-on point 11 in the circumferential groove 11.2 to produce them. Subsequently, the individual wire loops of the wire binding 101.1, 102.1, 103.1 resulting from this are severed so that wire openings 111.3, 112.3, 113.3 result in the region of the wire binding 101.1, 102.1, 103.1. Because of these wire openings 111.3, 112.3, 113.3, stray inductances of the wire binding 101.1, 102.1, 103.1, which affect the quality of the 3D antenna 100 negatively, are avoided, since the conductor loop-like wire loops are interrupted. In particular, when using a thin wire 111, 112, 113, i.e. with a wire diameter of less than 300 .Math.m, the wire bindings 101.1, 102.1, 103.1 are metallized before the severing in the region of the wire openings 111.3, 112.3, 113.3 to be produced, so that the individual wire loops of the wire bindings 101.1, 102.1, 103.1 stabilize each other during the severing.

[0140] The wire openings 111.3, 112.3, 113.3 are pressed into the winding-on recess 11.1 of the winding-on point 11. An engagement stabilizing the wire openings 111.3, 112.3, 113.3 is produced in this way. The severing of the wire 111, 112, 113 of the wire bindings 101.1, 102.1, 103.1 can be carried out in a combined work step together with the pressing of the wire openings 111.3, 112.3, 113.3 into the winding-on recesses 11.1. For this purpose, a plunger-shaped separating tool in the form of a punch can be inserted into the winding-on recess 11.1, so that this, together with the winding-on recess 11.1 acting in the manner of a die, separates the wire 111, 112, 113 of the wire bindings 101.1, 102.1, 103.1 accordingly and shapes it at the same time.

[0141] With the 3D antenna 100 described above and with the help of the described method, a 3D antenna.

TABLE-US-00001 Reference characters 1 Antenna core 1.1 Topside 1.2 Underside 1.3 Outer side 1.4 Inner side 1.5 Edge 2 Stabilizing floor 3 Edge post 4 Coil region 4.1 Channel recess 4.2 Channel recess 4.3 Channel recess 5 Coil region 5.1 Channel recess 5.2 Channel recess 5.3 Channel recess 6 Notch 6.1 Surface 6.2 Surface 7 Guide region 7.1 Guide section 7.2 Guide section 7.3 Guide section 7.4 Nose 8 Inner protrusion 9 Coil region 10 Core foot 11 Winding-on point 11a, b Types of winding-on point 11.1 Winding-on recess 11.2 Circumferential groove 11.3 Fold 12 Receiving groove 13 Guide groove 14 Guide groove 15 Centering groove 100 3D Antenna 101 Antenna winding 101.1 Wire binding 101,2 Coil winding 101.3 Transition winding 102 Antenna winding 102.1 Wire binding 102.2 Coil winding 102.3 Transition winding 103 Antenna winding 103.1 Wire binding 103.2 Coil binding 103.3 Transition winding 111 Wire 111.1 Starting end of a wire 11.2 Wire end 11.3 Wire opening 112 Wire 112.1 Starting end of a wire 112.2 Wire end 112.3 Wire opening 113 Wire 113.1 Starting end of a wire 113.2 Wire end 113.3 Wire opening LA1 Longitudinal axis LA2 Longitudinal axis X x-axis Y y-axis Z z-axis

[0142] Having described the invention in detail and by reference to the various embodiments, it should be understood that modifications and variations thereof are possible without departing from the scope of the claims of the present application.