Control device for receiving and / or processing radio signals in a vehicle

Abstract

The invention relates to a control device (100) for receiving and / or processing radio signals in a vehicle. The control device (100) comprises a housing (101) in which a slot antenna (103) is integrated.

Description

TECHNICAL FIELD

[0001] The invention relates to a control device for receiving and / or processing radio signals in a vehicle. BACKGROUND

[0002] Nowadays, vehicles are usually provided to communicate with communication networks, traffic infrastructure agencies and / or other vehicles by means of radio waves, for example via a mobile radio network or a WLAN (short for Wireless Local Area Network). V2X communication is becoming increasingly important. V2X communication is also referred to as Vehicle-to-Everything Communication, Car2X communication or Car-to-X communication and enables an exchange of information and data between V2X communication participants. The participants of V2X communication are mainly traffic participants and traffic infrastructure agencies. The communication between the participants of V2X communication takes place by means of radio signals which are exchanged between the participants, for example via ITS-G5 / DSRC (short for Dedicated Short Range Communication) or in a mobile radio network, for example via a PC5 or Uu interface.

[0003] In order to be able to communicate by means of radio waves, vehicles require corresponding transmitting units, receiving units and / or combined transmitting and receiving units which have an antenna for transmitting and / or receiving radio signals. SUMMARY

[0004] The invention is based on the object of providing a device for transmitting and / or receiving radio signals in a vehicle which is improved, in particular in terms of structural space.

[0005] This object is achieved according to the invention by a control device having the features of claim 1.

[0006] Advantageous embodiments of the invention are the subject matter of the dependent claims.

[0007] A control device for receiving and / or processing radio signals in a vehicle according to the invention comprises a housing in which a slot antenna is integrated.

[0008] A slot antenna is a recess in a metal surface which functions as an antenna. Integrating a slot antenna into the housing of a control device which is provided for receiving and / or processing radio signals enables a space-saving and low-cost implementation of the control device and the antenna for the control device, since the control device and the antenna are not implemented as separate components.

[0009] In one embodiment of the control device according to the application, the housing has a metal surface, and the slot antenna has a feed point and a first recess in the metal surface, which extends to both sides of the feed point.

[0010] In this embodiment of the control device according to the application, the slot antenna is implemented using the surface of the housing.

[0011] In another embodiment of the control device according to the application, the metal surface is a surface of a housing wall of the housing made of metal. Here, the first recess in the housing wall has a plastic covering, for example.

[0012] In this embodiment of the control device according to the application, the slot antenna is implemented using the housing wall made of metal of the housing. By means of the plastic covering of the first recess, the interior of the housing can be protected from the intrusion of dirt, gas and / or liquid, which could otherwise intrude into the interior of the housing through the first recess.

[0013] In another embodiment of the control device according to the application, the metal surface is a metalization of a housing wall made of plastic.

[0014] In this embodiment of the control device according to the application, the slot antenna has a recess in the metalization of the housing wall made of plastic, so that the interior of the housing is protected from the intrusion of dirt, gas and / or liquid by means of the housing wall.

[0015] In another embodiment of the control device according to the application, the first recess extends asymmetrically to both sides of the feed point.

[0016] By means of the asymmetric implementation of the first recess, the frequency range of the slot antenna can be influenced.

[0017] In another embodiment of the control device according to the application, the housing has two housing parts, and the slot antenna is or comprises a separation slot between the housing parts.

[0018] In this embodiment of the control device according to the application, the slot antenna is implemented using the separation slot between the two housing parts.

[0019] In another embodiment of the control device according to the application, the edge of the first recess is polygonal. Alternatively, the edge of the first recess has at least one curved region.

[0020] These embodiments of the control device according to the application enable, inter alia, a space-saving implementation of the slot antenna, wherein the first recess has a meandering, folded or undulating course.

[0021] In a further embodiment of the control device according to the application, the first recess has at least one recess section which widens with increasing distance from the feed point.

[0022] In these embodiments of the control device according to the application, the first recess has at least one "flat" area. Thereby, the frequency spectrum of the slot antenna, which is embodied in a slit-like manner compared to the first recess, is enlarged, that is to say, the slot antenna is embodied in a wider-band manner.

[0023] In a further embodiment of the control device according to the application, the slot antenna has at least one parasitic element.

[0024] The parasitic element of an antenna is a passive element of the antenna which is excited by electromagnetic coupling of the electromagnetic field generated by other elements of the antenna. The parasitic element itself generates an electromagnetic field which superimposes the electromagnetic field of the other elements of the antenna. For example, the directional characteristics and the frequency spectrum of the electromagnetic radiation transmitted and / or received by the antenna can be influenced by the appropriate shape and arrangement of the parasitic element.

[0025] In a further embodiment of the control device according to the application, each parasitic element is configured as a second recess in the metal surface which is spaced apart from the first recess. For example, the edge of the second recess is polygonal.

[0026] In this embodiment of the control device according to the application, the metal surface of the housing is also used to realize the parasitic element of the slot antenna.

[0027] In a further embodiment of the control device according to the application, the housing has two housing parts, and the at least one parasitic element is or comprises a separation slit between the housing parts.

[0028] In this embodiment of the control device according to the application, the separation slit between the two housing parts of the housing is used to configure the parasitic element.

[0029] In a further embodiment of the control device according to the application, the parasitic element is arranged asymmetrically with respect to the feed point of the slot antenna.

[0030] For example, it is thereby possible to influence the directional characteristics and / or the frequency spectrum of the slot antenna. BRIEF DESCRIPTION OF DRAWINGS

[0031] Embodiments of the application will be explained in more detail below with reference to the drawings. Therein:

[0032] Figure 1 A first embodiment of the control device according to the application is shown;

[0033] Figure 2 A second embodiment of the control device according to the application is shown;

[0034] Figure 3 A third embodiment of a control device according to the present application is shown;

[0035] Figure 4 A fourth embodiment of a control device according to the present application is shown;

[0036] Figure 5 A fifth embodiment of a control device according to the present application is shown;

[0037] Figure 6 A sixth embodiment of a control device according to the present application is shown;

[0038] Figure 7 A seventh embodiment of a control device according to the present application is shown.

[0039] In the figures, mutually corresponding parts have partially the same reference numerals. DETAILED DESCRIPTION

[0040] Figure 1 A first embodiment of a control device 100 according to the present application is shown. The control device 100 is provided for receiving and / or processing radio signals in a vehicle.

[0041] The control device 100 has a housing 101 in which a slot antenna 103 is integrated. The housing 101 has a metal surface 105 and the slot antenna 103 has a feed point 107 and a first recess 109 in the metal surface 105, wherein the first recess 109 extends to both sides of the feed point 107.

[0042] The first recess 109 stretches parallel to a first straight line 110, wherein the extension of the first recess 109 parallel to the first straight line 110 is significantly greater than the extension of the first recess 109 parallel to a second straight line 111 parallel to the first straight line 110. Furthermore, the first recess 109 is rectangular, that is to say, the edges 112 of the first recess 109 are rectangular. Two mutually parallel edges of the rectangle are significantly longer than the other two mutually parallel edges of the rectangle and stretch parallel to the first straight line 110.

[0043] The feed point 107 of the slot antenna 103 is arranged in the center of the first recess 109, such that the first recess 109 extends symmetrically to both sides of the feed point 107 of the slot antenna 103.

[0044] The slot antenna 103 also has a parasitic element 113. The parasitic element 113 is formed by a second recess 115 in the metal surface 105 separate from the first recess 109.

[0045] The second recess 115 extends parallel to the first straight line 110 at a distance from the first recess 109, wherein the extension of the second recess 115 parallel to the first straight line 110 is substantially greater than the extension of the second recess 115 parallel to the second straight line 111. The second recess 115 is also rectangular, that is to say, the edges 117 of the second recess 115 are rectangular. Two mutually parallel edges of the rectangle are substantially longer than the other two mutually parallel edges of the rectangle and extend parallel to the first straight line 110. Here, the longer edges of the rectangle are longer than the longer edges of the rectangle formed by the first recess 109. For example, the longer edges of the rectangle formed by the second recess 115 are more than twice as long as the longer edges of the rectangle formed by the first recess 109.

[0046] The distance of one end of the second recess 115 from the second straight line 111 is at least approximately the same as the distance of one end of the first recess 109 from the second straight line 111. The two recesses 109, 115 extend in the same direction from these ends.

[0047] Figure 2 A second embodiment of a control device 100 according to the application is shown. The control device 100 is provided for receiving and / or processing radio signals in a vehicle.

[0048] The control device 100 has a housing 101 in which a slot antenna 103 is integrated. The housing 101 has a metal surface 105 and the slot antenna 103 has a feed point 107 and a first recess 109 in the metal surface 105, wherein the first recess 109 extends to both sides of the feed point 107.

[0049] The first recess 109 comprises a first recess section 201 extending parallel to a first straight line 110, a second recess section 202 extending parallel to a second straight line 111 orthogonal to the first straight line 110, and a third recess section 203 extending parallel to the first straight line 110. The first recess section 201 is connected to a first end of the second recess section 202 and the third recess section 203 is connected to a further end of the second recess section 202, wherein the first recess section 201 and the third recess section 203 extend to different edges of the second recess section 202 from one another. The second recess section 202 thus connects the first recess section 201 and the third recess section 203 to one another and at a right angle thereto. The feed point 107 of the slot antenna 103 is arranged substantially in the center of the third recess section 203.

[0050] The edge 112 of the first recess 109 is octagonal. Two sides of the octagon are edge sections of the first recess section 201 parallel to the first straight line 110. Two other sides of the octagon are edge sections of the second recess section 202 parallel to the second straight line 111. Two other sides of the octagon are edge sections of the third recess section 203 parallel to the first straight line 110. Two other sides of the octagon are edge sections of the first recess section 201 or the third recess section 203 parallel to the second straight line 111. The extension of the first recess section 201 and the third recess section 203 parallel to the first straight line 110 is significantly greater than the extension of the first recess section 201 and the third recess section 203 parallel to the second straight line 111. The extension of the second recess section 202 parallel to the second straight line 111 is significantly greater than the extension of the second recess section 202 parallel to the first straight line 110.

[0051] In contrast to the embodiment shown in Fig. 1, the first recess 109 is "bent" so that its extension parallel to the first straight line 110 can be reduced. Figure 1

[0052] The slot antenna 103 further has a parasitic element 113. The parasitic element 113 is formed by a second recess 115 in the metal surface 105 separate from the first recess 109.

[0053] The second recess 115 comprises a fourth recess section 204 running parallel to the first straight line 110 and a fifth recess section 205 and a sixth recess section 206 running parallel to the second straight line 111, respectively. The fifth recess section 205 is connected to one end of the fourth recess section 204 and the sixth recess section 206 is connected to the other end of the fourth recess section 204, wherein the fifth recess section 205 and the sixth recess section 206 extend to the same side of the fourth recess section 204 facing the first recess 109.

[0054] The edge 117 of the second recess 115 is octagonal. Two sides of the octagon are edge sections of the fourth recess section 204 parallel to the first straight line 110. Two other sides of the octagon are edge sections of the fifth recess section 205 parallel to the second straight line 111. Two other sides of the octagon are edge sections of the sixth recess section 206 parallel to the second straight line 111. Two other sides of the octagon are edge sections of the fifth recess section 205 or the sixth recess section 206 parallel to the first straight line 110. The extension of the fourth recess section 204 parallel to the first straight line 110 is significantly greater than the extension of the fourth recess section 204 parallel to the second straight line 111. Furthermore, the extension of the fourth recess section 204 parallel to the first straight line 110 is greater than the extension of the first recess 109 parallel to the first straight line 110.

[0055] Figure 3 ​A third embodiment of a control device 100 according to the present application is shown. The control device 100 is arranged for receiving and / or processing radio signals in a vehicle.

[0056] The control device 100 has a housing 101 in which a slot antenna 103 is integrated. The housing 101 has a metal surface 105 and the slot antenna 103 has a feed point 107 and a first recess 109 in the metal surface 105, wherein the first recess 109 extends to both sides of the feed point 107.

[0057] The first recess 109 comprises a first recess section 301, a second recess section 302 and a third recess section 303, which are each stretched parallel to a first straight line 110, and a fourth recess section 304 and a fifth recess section 305, which are each stretched parallel to a second straight line 111, which is orthogonal to the first straight line 110. The fourth recess section 304 is connected to one end of the first recess section 301 and the fifth recess section 305 is connected to the other end of the first recess section 301, wherein the fourth recess section 304 and the fifth recess section 305 extend to the same side of the first recess section 301. The second recess section 302 is connected to the fourth recess section 304 and extends towards the fifth recess section 305. The third recess section 303 is connected to the fifth recess section 305 and extends towards the fourth recess section 304. The second recess section 302 and the third recess section 303 are spaced apart from each other. The feed point 107 of the slot antenna 103 is arranged substantially in the center of the second recess section 302.

[0058] An edge 112 of the first recess 109 is decagon-shaped. Every two edges of the decagon are edge sections of the first recess section 301, the second recess section 302 or the third recess section 303, which are parallel to the first straight line 110. Every other two edges of the decagon are edge sections of the fourth recess section 304 or the fifth recess section 305, which are parallel to the second straight line 111. The other two edges of the decagon are edge sections of the second recess section 302 or the third recess section 303, which are parallel to the second straight line 111.

[0059] The extension of the first recess section 301, the second recess section 302 and the third recess section 303 parallel to the first straight line 110 is substantially greater than the extension of the first recess section 301, the second recess section 302 and the third recess section 303 parallel to the second straight line 111. The extension of the fourth recess section 304 and the fifth recess section 305 parallel to the second straight line 111 is substantially greater than the extension of the fourth recess section 304 and the fifth recess section 305 parallel to the first straight line 110.

[0060] WithFigure 1 The first recess 109 is "folded" in comparison with the embodiments shown, so that its extension parallel to the first straight line 110 can be reduced.

[0061] The slot antenna 103 also has a parasitic element 113. The parasitic element 113 is formed by a second recess 115 in the metal surface 105 separate from the first recess 109.

[0062] The second recess 115 extends parallel to the first straight line 110 at a distance from the first recess 109, wherein the extension of the second recess 115 parallel to the first straight line 110 is significantly greater than the extension of the second recess 115 parallel to the second straight line 111. The second recess 115 is configured as a rectangle, that is to say, the edges 117 of the second recess 115 are rectangular. Two mutually parallel edges of the rectangle are significantly longer than the other two mutually parallel edges of the rectangle and extend parallel to the first straight line 110. Here, the extension of the second recess 115 parallel to the first straight line 110 is greater than the extension of the first recess 109 parallel to the first straight line 110, for example, more than twice as great.

[0063] Figure 4 A fourth embodiment of a control device 100 according to the application is shown. The control device 100 is provided for receiving and / or processing radio signals in a vehicle.

[0064] The control device 100 has a housing 101 in which a slot antenna 103 is integrated. The housing 101 has a metal surface 105, and the slot antenna 103 has a feed point 107 and a first recess 109 in the metal surface 105, wherein the first recess 109 extends to both sides of the feed point 107.

[0065] The first recess 109 comprises a first recess section 401, a second recess section 402 and a third recess section 403. In contrast to the embodiments described with reference to Figures 1 to 3 In contrast to the embodiments described, the second recess section 402 and the third recess section 403 are not configured as slots, but as planes. The first recess section 401 is arranged between the second recess section 402 and the third recess section 403 and connects the second recess section 402 and the third recess section 403 to one another. The feed point 107 of the slot antenna 103 is arranged in the center of the first recess section 401. The first recess 109 is symmetrical under an axis mirror through the feed point 107. The second recess section 402 and the third recess section 403 expand with increasing distance from the feed point 107, that is to say, the extension of the second recess section 402 and the third recess section 403 parallel to the second straight line 111 increases with increasing distance from the feed point 107.

[0066] The edge 112 of the first recess 109 is hexagonal. A first side of the hexagon runs parallel to the first straight line 110 which runs parallel to the second straight line 111 and forms an edge section of all three recess sections 401, 402, 403. Two second sides of the hexagon are edge sections of each of the recess sections 402, 403 which run parallel to the second straight line 111 and each connect to one end of the first side. A third side of the hexagon is an edge section of the first recess section 401 which runs parallel to the first straight line 110 and is significantly shorter than the first side of the hexagon. Two fourth sides of the hexagon each connect one end of the second side of the hexagon and one end of the third side and each form an edge section of one of the recess sections 402, 403.

[0067] The slot antenna 103 also has a parasitic element 113. The parasitic element 113 is formed by a second recess 115 in the metal surface 105 which is separate from the first recess 109.

[0068] The second recess 115 runs parallel to the first straight line 110 at a distance from the first recess 109, wherein the extent of the second recess 115 parallel to the first straight line 110 is significantly greater than the extent of the second recess 115 parallel to the second straight line 111. The second recess 115 is configured as a rectangle, that is to say, the edge 117 of the second recess 115 is rectangular. Two mutually parallel sides of the rectangle are significantly longer than the other two mutually parallel sides of the rectangle and run parallel to the first straight line 110. Here, the extent of the second recess 115 parallel to the first straight line 110 is greater than the extent of the first recess 109 parallel to the first straight line 110, for example, more than twice as great.

[0069] Figure 5 A fifth embodiment of a control device 100 according to the application is shown. The control device 100 is provided for receiving and / or processing radio signals in a vehicle.

[0070] The control device 100 has a housing 101 in which the slot antenna 103 is integrated. The housing 101 has a metal surface 105 and the slot antenna 103 has a feed point 107 and a first recess 109 in the metal surface 105, wherein the first recess 109 extends to both sides of the feed point 107.

[0071] The first recess 109 is configured similarly to the first recess 109 described with reference to the first embodiment. Figure 4The first recess 109 of the embodiment of the control device 100. Again, the first recess 109 comprises a first recess section 501, a second recess section 502 and a third recess section 503, wherein the second recess section 502 and the third recess section 503 are configured as planes. The first recess section 501 is arranged between the second recess section 502 and the third recess section 503 and connects the second recess section 502 and the third recess section 503 to each other. The feed point 107 of the slot antenna 103 is arranged in the center of the first recess section 501. The second recess section 502 and the third recess section 503 also expand with increasing distance from the feed point 107. However, in contrast to the reference Figure 4 In contrast to the first recess 109 of the embodiment of the control device 100, the second recess section 502 and the third recess section 503 are configured asymmetrically to each other.

[0072] The edge 112 of the first recess 109 is octagonal. Each of the two first edges of the octagon is an edge section of the second recess section 502 or the third recess section 503 parallel to the second straight line 111. Two second edges of the octagon are edge sections of the first recess section 501 parallel to the first straight line 110 orthogonal to the second straight line 111. Four third edges of the octagon each connect one end of a first edge and one end of a third edge of the octagon and each form an edge section of one of the recess sections 502, 503.

[0073] The slot antenna 103 also has a parasitic element 113. The parasitic element 113 is formed by a second recess 115 in the metal surface 105 separate from the first recess 109.

[0074] The second recess 115 comprises a fourth recess section 504 extending parallel to the first straight line 110 and a fifth recess section 505 parallel to the second straight line 111 and connected to one end of the fourth recess section 504. The extension of the fourth recess section 504 parallel to the first straight line 110 is significantly greater than the extension of the fourth recess section 504 parallel to the second straight line 111 and greater than the extension of the first recess 109 parallel to the first straight line 110. The extension of the fifth recess section 505 parallel to the second straight line 111 is significantly greater than the extension of the fifth recess section 505 parallel to the first straight line 110 and greater than the extension of the first recess 109 parallel to the second straight line 111. Here, the first recess 109 is surrounded on both sides by the second recess 115.

[0075] The edge 117 of the second recess 115 is hexagonal. Two sides of the hexagon are edge sections of the fourth recess section 504 which are parallel to the first straight line 110. Two other sides of the hexagon are edge sections of the fifth recess section 505 which are parallel to the second straight line 111. Another side of the hexagon is an edge section of the fourth recess section 504 which is parallel to the second straight line 111. Another side of the hexagon is an edge section of the fifth recess section 505 which is parallel to the first straight line 110.

[0076] Figure 6 A sixth embodiment of a control device 100 according to the present application is shown. The control device 100 is provided for receiving and / or processing radio signals in a vehicle.

[0077] The control device 100 has a housing 101 in which a slot antenna 103 is integrated. The housing 101 has a metal surface 105 and the slot antenna 103 has a feed point 107 and a first recess 109 in the metal surface 105, wherein the first recess 109 extends to both sides of the feed point 107.

[0078] The first recess 109 is configured similar to the first recess 109 of the embodiments of the control device 100 described with reference to Figure 5 The first recess 109 comprises a first recess section 601, a second recess section 602 and a third recess section 603, wherein the second recess section 602 and the third recess section 603 are configured as planes. The first recess section 601 is arranged between and interconnects the second recess section 602 and the third recess section 603. The feed point 107 of the slot antenna 103 is arranged in the center of the first recess section 601. Only the relative extension of the second recess section 602 and the third recess section 603 parallel to the first straight line 110 differs from the respective relative extension of the second recess section 502 and the third recess section 503 of the embodiments of the control device 100 described with reference to Figure 5

[0079] The slot antenna 103 further has a parasitic element 113. The parasitic element 113 is formed by a second recess 115 in the metal surface 105 which is separate from the first recess 109.

[0080] In this embodiment of the control device 100, the second recess 115 extends parallel to the first straight line 110 meandering along and spaced apart from the first recess 109. The extension of the first recess 109 and the second recess 115 parallel to the first straight line 110 is at least approximately the same. The edge 117 of the second recess 115 is polygonal.

[0081] Figure 7 ​A seventh embodiment of a control device 100 according to the present application is shown. The control device 100 is provided for receiving and / or processing radio signals in a vehicle.

[0082] The control device 100 has a housing 101 in which a slot antenna 103 is integrated. The housing 101 has a metal surface 105 and the slot antenna 103 has a feed point 107 and a first recess 109 in the metal surface 105, wherein the first recess 109 extends to both sides of the feed point 107.

[0083] The first recess 109 comprises a first recess section 701 and a second recess section 702, which are each configured as a plane. The feed point 107 of the slot antenna 103 is arranged between the first recess section 701 and the second recess section 702. The first recess 109 is symmetrical under an axis mirror through a first straight line 110, which runs through the feed point 107, and a second straight line 111, which runs through the feed point 107 and is orthogonal to the first straight line 110. An edge 112 of the first recess 109 is configured curved. A region of the first recess 109 around the feed point 107 is configured concave, two regions of the first recess 109 connected to the concave region are configured convex. The shape of the first recess section 701 and the second recess section 702 can each be described as "bar-like".

[0084] The slot antenna 103 also has a parasitic element 113. The parasitic element 113 is formed by a second recess 115 in the metal surface 105 separate from the first recess 109.

[0085] The second recess 115 comprises a third recess section 703 running parallel to the first straight line 110 and a fourth recess section 704 connected to one end of the third recess section 703 parallel to the second straight line 111. The extension of the third recess section 703 parallel to the first straight line 110 is significantly greater than the extension of the third recess section 703 parallel to the second straight line 111 and greater than the extension of the first recess 109 parallel to the first straight line 110. The extension of the fourth recess section 704 parallel to the second straight line 111 is significantly greater than the extension of the fourth recess section 704 parallel to the first straight line 110 and greater than the extension of the first recess 109 parallel to the second straight line 111. Here, the first recess 109 is surrounded on both sides by the second recess 115.

[0086] The edge 117 of the second recess 115 is hexagonal. Two sides of the hexagon are edge sections of the third recess section 703 parallel to the first straight line 110. Two other sides of the hexagon are edge sections of the fourth recess section 704 parallel to the second straight line 111. Another side of the hexagon is an edge section of the third recess section 703 parallel to the second straight line 111. Another side of the hexagon is an edge section of the fourth recess section 704 parallel to the first straight line 110.

[0087] In all embodiments of the control device 100 described with reference to Figures 1 to 7 In all embodiments of the control device 100 described with reference to

[0088] In all embodiments of the control device 100 described with reference to Figures 1 to 7 In all embodiments of the control device 100 described with reference to

[0089] In all embodiments of the control device 100 described with reference to Figures 1 to 7 In all embodiments of the control device 100 described with reference to

[0090] The size of the first recess 109 is designed with respect to the wavelength of radio waves for which the slot antenna 103 is arranged to receive and / or transmit. For example, in the embodiments of the control device 100 described with reference to Figure 1 and Figures 4 to 7 the first recess 109 is approximately half a wavelength of the radio waves to be transmitted or received by the slot antenna 103. In the embodiments of the control device 100 described with reference to Figure 2 and Figure 3 the length of the path following the course of the first recess 109 is, for example, approximately half a wavelength of the radio waves to be transmitted or received by the slot antenna 103.

[0091] As a result of the planar implementation of the first recess 109 in the embodiments of the control device 100 described with reference to Figures 4 to 7 in these embodiments, the frequency spectrum of the slot antenna 103 is greater than the frequency spectrum of a corresponding (i.e. similarly dimensioned) slot antenna 103 of the embodiments described with reference to Figures 1 to 3 that is, in the embodiments described with reference to Figures 4 to 7 the slot antenna 103 is respectively more broadband than the corresponding embodiments described with reference to Figures 1 to 3

[0092] List of reference signs

[0093] 100 control device

[0094] 101 housing

[0095] 103 slot antenna

[0096] 105 metal surface

[0097] 107 feed point

[0098] 109 first recess

[0099] 110 first straight line

[0100] 111 second straight line

[0101] 112 edge of the first recess

[0102] 113 parasitic element

[0103] 115 second recess

[0104] 117 edge of the second recess

[0105] 201 to 206 recess sections

[0106] 301 to 305 recess sections

[0107] 401 to 403 recess sections​

[0108] 501 to 505 recess segments

[0109] 601 to 603 recess segments

[0110] 701 to 704 recess segments

Claims

1. Control device (100) for receiving and / or processing radio signals in a vehicle, the control device (100) comprising a housing (101), in which a slot antenna (103) is integrated.

2. The control device (100) according to claim 1, wherein The housing (101) has a metal surface (105) and the slot antenna (103) has a feed point (107) and a first recess (109) in the metal surface (105), which first recess (109) extends to both sides of the feed point (107).

3. The control device (100) according to claim 2, wherein The metal surface (105) is a surface of a housing wall of the housing (101) made of metal.

4. The control device (100) according to claim 3, wherein The first recess (109) in the housing wall has a plastic covering.

5. The control device (100) according to claim 2, wherein The metal surface (105) is a metallization of a housing wall made of plastic.

6. Control device (100) according to one of claims 2 to 5, wherein the first recess (109) extends asymmetrically to both sides of the feed point (107).

7. The control device (100) according to claim 1, wherein The housing (101) has two housing parts and the slot antenna (103) is or comprises a separation slot between the housing parts.

8. The control device (100) according to any one of claims 2 to 5, wherein An edge (112) of the first recess (109) is polygonal.

9. The control device (100) according to any one of claims 2 to 5, wherein An edge (112) of the first recess (109) has at least one curved region.

10. The control device (100) according to any one of claims 2 to 5, wherein The first recess (109) has at least one recess section (402, 403, 502, 503, 602, 603, 701, 702) which expands with increasing distance from the feed point (107).

11. The control device (100) according to any one of claims 1 to 5, wherein The slot antenna (103) has at least one parasitic element (113).

12. The control device (100) according to any one of claims 2 to 5, wherein The slot antenna (103) has at least one parasitic element (113) and each parasitic element (113) is constituted as a second recess (115) in the metal surface (105) spaced apart from the first recess (109).

13. The control device (100) according to claim 12, wherein An edge (117) of the second recess (115) is polygonal.

14. The control device (100) according to claim 11, wherein The housing (101) has two housing parts and at least one parasitic element (113) is or comprises a separation slot between the housing parts.

15. The control device (100) according to claim 11, wherein The at least one parasitic element (113) is arranged asymmetrically with respect to the feed point (107) of the slot antenna (103). The at least one parasitic element (113) is arranged asymmetrically with respect to the feed point (107) of the slot antenna (103).

Images