Antenna arrangement for a vehicle

Abstract

The invention relates to an antenna arrangement (A) for a vehicle comprising a broadband antenna (1), a bracket (2) for mounting the broadband antenna (1), and a reflector (3). According to the invention, the bracket (2) is additionally designed to - to attach the reflector (3) to the antenna impedance depending on this impedance and - to position the reflector (3) at a predetermined angle relative to the broadband antenna (1).

Description

[0001] The invention relates to an antenna arrangement for a vehicle with a broadband antenna, a holder for attaching the broadband antenna and a reflector.

[0002] A broadband patch antenna is known from WO 2006 / 000116. The broadband patch antenna comprises a flat, rectangular-edged patch plate arranged at a predetermined first height above and parallel to the flat base of an electrically conductive reflector. Furthermore, the broadband patch antenna comprises a device for feeding an RF signal into the patch plate. The device comprises a conductor that extends vertically and insulated through the base of the reflector and terminates at a feed point on the patch plate. The conductor of the device is formed between the base of the reflector and the patch plate as the inner conductor of a coaxial conductor arrangement.

[0003] The invention is based on the object of providing a novel antenna arrangement for a vehicle.

[0004] The object is achieved according to the invention by an antenna arrangement which has the features specified in claim 1.

[0005] Advantageous embodiments of the invention are the subject of the subclaims.

[0006] An antenna arrangement for a vehicle comprises a broadband antenna, a mount for attaching the broadband antenna, and a reflector. According to the invention, the mount is additionally configured to attach the reflector to the antenna depending on the antenna's impedance and to position the reflector at a predeterminable angle relative to the broadband antenna.

[0007] Such an antenna arrangement makes it possible, in particular by appropriately aligning the reflector attached to the holder, to individually adapt the performance of the broadband antenna to requirements, in particular with regard to radio communication services that can be carried out using the broadband antenna.

[0008] Embodiments of the invention are explained in more detail below with reference to drawings.

[0009] Showing: Fig. 1 schematically shows a perspective view of an antenna arrangement and Fig. 2 schematically shows a perspective view of the antenna arrangement with a differently positioned reflector.

[0010] Corresponding parts are provided with the same reference numerals in all figures.

[0011] Fig. 1 shows a perspective view of an antenna arrangement A for a vehicle with a broadband antenna 1, a holder 2 and a reflector 3.

[0012] Fig. Figure 2 shows a perspective view of the antenna arrangement A with the broadband antenna 1, the holder 2 and the reflector 3, which is arranged in relation to Fig. 1 is positioned differently.

[0013] It is generally known that an antenna, including a broadband antenna 1, must be securely mounted at specified positions for various radio communication services. This requires a mounting concept specific to the available installation space to keep the antenna secure. Such a mount 2 is typically made of a relatively low-loss dielectric material to largely prevent any impact on the performance of the attached antenna.

[0014] The antenna arrangement A is described below, the holder 2 of which is designed to attach both the broadband antenna 1 and the reflector 3.

[0015] The broadband antenna 1 has a plate shape and an antenna structure. A strut 2.1 is arranged in each corner region E of the broadband antenna 1. The struts 2.1 protrude perpendicularly in one and the same direction from the broadband antenna 1. The struts 2.1 form the mount 2. Using the struts 2.1, the broadband antenna 1 can be mounted in a predetermined position for transmitting and receiving signals.

[0016] The struts 2.1 have a number of fastening elements, not shown in detail, in particular in the form of locking elements, which correspond to further locking elements of the reflector 3, so that by means of the locking elements and the further locking elements a locking connection can be established between the holder 2 and the reflector 3.

[0017] According to the Fig. 1 and Fig. In the embodiments shown in Figure 2, the reflector 3 has essentially the same shape as the broadband antenna 1. This means that, in particular, a surface area of ​​the reflector 3 corresponds to a surface area of ​​the broadband antenna 1. The size of the reflector 3 is adapted to the dimensions of the mount 2, although the reflector 3 can also have any other shape, with the reflector 3 being able to project beyond the broadband antenna 1, for example, in sections. In particular, the shape of the reflector 3 is adapted to the installation space available for the mount and the antenna arrangement A.

[0018] The minimum area of ​​reflector 3 is more than half a wavelength of broadband antenna 1 in both directions, so that a significant reflection factor can be achieved. The conductivity of reflector 3 is more than 1*10exp 6Siemens / m, whereby such conductivity can be achieved sufficiently well using commercially available metals. For example, a comparatively thin metal plate and / or a wire construction and / or a flat metallization of a corresponding plastic surface is or will be used as reflector 3 of the antenna arrangement A.

[0019] In an antenna structure, for example, a broadband monopole structure or an antenna structure of a dipole or spiral antenna, no reflector 3 is provided. As a result, such antenna structures are simpler in design, require less space, and are usually more cost-effective.

[0020] If necessary, it is possible to attach the reflector 3 to the holder 2 and thus integrate it into the antenna arrangement A in order to optimize the performance of the antenna, in particular the broadband antenna 1, and in particular to influence a directional characteristic. In particular, the reflector 3 can be attached to the holder 2 at various distances and orientations relative to the broadband antenna 1, taking into account an antenna impedance. One effect can be a targeted, adjustable radiation direction of high-frequency energy. Thus, a standard reflector at a distance of a quarter of the wavelength can amplify the energy radiated by the broadband antenna 1 in a specific, predeterminable direction, as shown in Fig. 1 is shown.

[0021] With a suitable arrangement of the reflector 3, for example an inclination, as in Fig.2, the directional characteristic can be adjusted and thus certain areas of the room can be optimally supplied with signals transmitted by the broadband antenna 1.

[0022] Furthermore, by means of the reflector 3 it is also possible to reduce negative influences, in particular based on components on the rear side of the antenna arrangement A, such as cable harnesses, control units and / or body shell metal structures of a vehicle.

[0023] By arranging the reflector 3 on the mount 2 of the broadband antenna 1, the performance of the broadband antenna 1, particularly with regard to its radiation characteristics, can be increased by adjusting the size, shape, and orientation of the reflector 3. In particular, it is possible to optimally align a main lobe of the broadband antenna 1 using the reflector 3. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] WO 2006 / 000116

[0002]

Claims

[1] Antenna arrangement (A) for a vehicle with a broadband antenna (1), a holder (2) for attaching the broadband antenna (2) and a reflector (3), characterized by that the holder (2) is additionally designed, - to attach the reflector (3) to the antenna depending on its impedance and - to position the reflector (3) at a predeterminable angle relative to the broadband antenna (1). [2] Antenna arrangement (A) according to claim 1, characterized by that the holder (2) for fastening and positioning the reflector (3) has locking elements which correspond to further locking elements arranged on the reflector (3) for producing a positive and / or non-positive locking connection. [3] Antenna arrangement (A) according to claim 1 or 2, characterized bythat the reflector (3) is plate-shaped, wherein a minimum area of ​​the reflector (3) is more than half a wavelength of the broadband antenna (1) in both directions. [4] Antenna arrangement (A) according to one of the preceding claims, characterized by that a conductivity of the reflector (3) more than 1*10exp 6 Siemens / m.

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