HK1065169B - Antenna for a receiver and/or transmitter, especially a roof antenna for motor vehicles - Google Patents

Description

Antenna of a receiving and/or transmitting device, in particular a roof antenna of a motor vehicle

Technical Field

The invention relates to an antenna of a receiving and/or transmitting device, in particular a roof antenna of a motor vehicle.

Background

A receiving device, in particular a radio receiver installed in a motor vehicle, is known, for example, from DE 19737395 a 1. The receiving device comprises a receiving part with at least one connection by means of which it can be connected to other components. A rod antenna can be inserted above the receiving section.

DE 29821723U 1, for example, also proposes an antenna for a motor vehicle. The antenna comprises an antenna mount which is formed by a housing-like or hood-like protective cover and a base plate which is mounted on the vehicle roof. Various electrical devices are housed in the interior cavity between the cover and the base plate. Wherein a wire 12 leads to a radiating device extending outwardly from the antenna mount. For this purpose, a so-called composite radiator is used, which is provided at its lower end with a continuous section of a thread, so that the threaded radiator can be screwed into and out of a threaded sleeve on a seat.

Some other means may also be placed in the antenna mount in order to finally receive different frequency ranges through one or more high frequency wires. I.e. antennas of this kind are suitable, for example, for the mobile radio range of different networks (e.g. D-networks or E-networks, but also for the frequency range of modern Universal Mobile Telecommunications Systems (UMTS) of approximately 1900 mhz to 2170 mhz). In addition, if necessary, Global Positioning System (GPS) signals and/or ultrashort wave programs can also be received and processed.

The antennas available on the market to date are in principle reliable, despite different switching principles.

However, with the last-mentioned type of antenna, there is the problem that it has a so-called "composite radiator" and is not suitable for use in the DoCoMo band, the Advanced Mobile Phone Service (AMPS) band and/or the normal mobile radio range of the Global System for Mobile (GSM)1800 and/or 900 bands, i.e. the 1710 to 1990 mhz range, nor in the universal mobile telecommunications system standard. That is, an antenna applicable to the above entire range includes the following meanings: in the case of transmission of high frequencies, the radiators and radiator elements for this high-frequency range have to be designed small, i.e. short, also for the antenna bow. This has the consequence that the entire antenna, including the existing radiators, has to be modified. This is contrary to the so-called equivalent solutions, since for different purposes of use, for example, one type of radiator should be used.

US 6191747B 1 proposes a dual band antenna. It relates to a multiband antenna using coil phase shifting to form a monopole gain radiator.

WO 0171847 a1 proposes a dual band automotive antenna having an antenna mount whose connecting wires are connected to radiating means via an intermediate wire.

Disclosure of Invention

It is therefore an object of the present invention to provide an improved multiband antenna arrangement, starting from the above-mentioned prior art.

According to the invention, this object is achieved by an antenna for a receiving and/or transmitting device of a motor vehicle, which has the following features:

-with an antenna mount;

-with a connection line arranged in the antenna mount for electrical connection to a radiating device;

the radiation device comprises at least one first radiator;

the radiating means preferably comprise, in addition to the radiating means, further radiating means connected to the radiating means by a latching coil, the latching coil being open at low frequencies and the first and second radiating means operating as a common radiating means, and the latching coil being latched at high frequencies; wherein the content of the first and second substances,

the connection line to the radiating means and/or the radiating means itself is provided with an electrically conductive extension;

the extension is arranged in the antenna mount or in a housing belonging to the antenna mount;

the extension is designed as a branch with respect to the wiring comprising the connection line and the radiating means.

In a preferred embodiment, the extension is arranged in the antenna mount, preferably in an antenna mount housing,

wherein the first radiator, the connecting line function as a common radiating means when the locking coil is locked for high frequency operation, and the conductive extension is designed to allow the antenna as a whole to be correctly tuned in the desired high frequency range.

According to a further preferred embodiment, the extension is a directly branching extension of the electrical connection line, wherein the electrical connection line extends beyond a connection, fastening and/or contact point, and the connection, fastening and/or contact point represents an electrical connection to the first radiating arrangement or to a bridging section leading to the first radiating arrangement.

According to a further preferred embodiment, the extension is a separate element and/or, in the case of an inflection point, is designed as an extension, preferably arcuate, to the connecting line.

According to another preferred solution, the extension is located on the same side as the connecting line with respect to the first radiating arrangement.

According to another preferred embodiment, the extension is arcuate and its free end is increasingly parallel to the axial extension of the first radiating means with a certain lateral offset.

According to a further preferred embodiment, the extension and the supply line are arranged opposite the radiation device.

According to another preferred embodiment, the extension is a planar element, preferably in the form of a disc or disk.

According to another preferred embodiment, the extension is an extension relative to the first radiating arrangement, which extension extends beyond the connecting, fixing and/or contact point in the direction of the base plate of the antenna mount.

According to another preferred embodiment, the extension is in the form of a wire, a rod or a plate.

According to another preferred embodiment, the extension is shorter and wider than the wire, rod or plate-shaped extension.

According to another preferred embodiment, the connecting line is formed in an arcuate shape.

According to a further preferred embodiment, the extension and the connecting line form a common bow.

It is entirely surprising that a very reliable antenna for a motor vehicle can now be used, for example, also in the universal mobile telecommunications system standard, i.e. generally in the much higher frequency bands, without reducing the overall height or the overall dimensions. This is achieved by providing an extension to the feed line of a radiator leading to a higher frequency range or to the antenna bow of a radiator leading to a higher frequency range. The extension can be varied in such a way that the supply line extends beyond a connection point or contact point of the radiator electrically contacting the supply line and preferably ends freely. If the feed line is formed by a conducting bow, this conducting bow can extend beyond the contact point with the first radiator, which contact point is used here at the same time as a connection point or even a fastening point for the radiator. However, this extension does not have to be a continuous extension of the conductor or the pantograph, but can also be in the form of a lead-back conductor section. It can also be an extension which extends beyond the connection point between the supply line or the pantograph and the electric radiator for the high-frequency range and which can optionally end in a region of the vehicle roof which is not far away.

The extension is, for example, designed as a plate or is also suitable and is preferably arranged at the connection point between the supply line or the supply bow and the radiator for the high-frequency range.

However, in the usual way, not only a radiator for the high-frequency range, preferably in the form of a screw, is used, but rather a coil and a further radiating element connected thereto are used on the extension of the radiator.

In this case, care must be taken that: in the low frequency range, i.e. in the long, medium, short and ultrashort wave ranges, the entire radiating device includes the antenna bow acting as a radiator; in the DoCoMo band, advanced radio service (AMPS) and global 900 band (corresponding to 810 to 960 mhz), the lower part of the antenna bow and the radiating device, i.e. the lower part of the radiator bolt, which is usually designed for this purpose, together with a part of the coil, function as a radiator. But if the frequency continues to increase, i.e. for example in the 1800 or 1900 band of global conduction (corresponding to 1710 mhz to 1990 mhz), only the antenna bow and the lower antenna bolt function as a radiator. In the universal mobile telecommunications system band (1900 to 2170 mhz), only the antenna bow and its extension act as a radiator.

Drawings

The invention is described below with reference to some embodiments of the accompanying drawings. These figures respectively show:

FIG. 1 is a schematic side view of a first embodiment of the present invention;

FIG. 2 is a schematic top view of the elongated bow of the embodiment of FIG. 1;

fig. 3 is a plan view corresponding to fig. 2, but with the bow extension designed to be shorter and wider.

FIG. 4 is a modified embodiment of FIGS. 1 and 2;

FIG. 5 is a side view of another alternate embodiment;

fig. 6 is yet another alternative embodiment.

Detailed Description

Fig. 1 shows a schematic side view of a profile cross section of a body panel 1 of a motor vehicle, in particular in the region close to the roof of the rear window, in which a corresponding antenna is to be installed.

The transmitting and/or receiving device of fig. 1 comprises an antenna mount 3 formed as a housing 5.

The housing 5 comprises a preferably hood-shaped protective cover 5a and a base plate 5b, which is fastened by suitable means, for example by means of an adhesive layer, an insulating material or the like.

Furthermore, the body steel plate 1 is usually provided with at least one opening 9, through which electrical connections to an antenna, coaxial cables, etc. can be routed from the inside of the vehicle. For this purpose, the base plate of the antenna housing is correspondingly mounted on the vehicle roof, in which case it is usually (although not shown in the figures, as is known per se) anchored in the base plate by a threaded sleeve in the form of a hollow threaded rod and projecting through the opening 9 in the vehicle roof into the vehicle interior. The wires are then run in through the thread sleeve. Finally, a central nut can be screwed onto the threaded sleeve from the inside of the vehicle, so that the antenna is firmly fixed to the vehicle roof.

A connecting line 13 is led from a connecting point 11 provided in the antenna mount 3 to the antenna device 15 itself, which in the embodiment shown consists of a first radiator 17, a latching coil 19 preferably arranged in the axial extension of the first radiator 17 and a second radiator 21 connected in the axial extension of the latching coil 19.

The first radiator 17 can be made of a metallic, electrically conductive bolt or have a bolt structure, for example. The second radiator 21 should be as elastic as possible and can be made, for example, from a glass fibre core on which a correspondingly coiled electrical conductor is wound. All possible antenna configurations suitable for the respective purpose of use are available.

In this case, care must be taken that: in the low frequency range, i.e. in the long, medium, short and ultrashort wave ranges, the entire radiating device includes the antenna bow acting as a radiator; in the DoCoMo band, the advanced radio service AMPS and the global 900 band (corresponding to 810 to 960 mhz), the lower part of the antenna bow and the radiating device, i.e. the lower part of the radiator bolt, which is usually designed for this purpose, together with a part of the coil, function as a radiator. But if the frequency continues to increase, i.e. for example in the 1800 or 1900 band of global conduction (corresponding to 1710 mhz to 1990 mhz), only the antenna bow and the lower antenna bolt function as a radiator. In the universal mobile telecommunications system band (1900 to 2170 mhz), only the antenna bow and its extension act as a radiator.

In the high frequency range, for example in the E-network (approximately 1800 mhz) or in particular for the universal mobile telecommunications system standard (approximately 1900 to 2170 mhz), the coil 19 is closed, so that only the first radiator 17 together with the electrical connection line 13 now functions as a radiating element.

The connecting line 13 can also be formed by an at least slightly elastic or partially elastic bow 13', which is preferably pretensioned in the direction of the radiator. I.e. under pretension, which tends to adhere to the lower connection point of the radiator (inside the housing) when the radiator is mounted, so that a permanent electrical contact can be established there without problems. The radiation device 15 is usually screwed to the antenna housing 5, so that, in particular when the vehicle is driven into a vehicle washing system, the antenna can be unscrewed without problems and can be screwed back again after the vehicle has been washed. The radiation device 15 screwed to the housing is finally retained and protected by the housing itself.

In order to use the antenna arrangement in the high-frequency range from now on, tuning of the high-frequency range is required, and both the first radiator in the form of a screw 17 and the electrical connection 13 must be correspondingly reduced.

This is in contrast to equivalent solutions according to which, for example, an already existing radiation device, which is also suitable for other purposes of use, should also be usable in the present case, which results in a further solution having to be sought.

To this end, according to the embodiment of fig. 1 and 2, the invention provides an extension 25. In this embodiment, this extension 25 acts as an extension of the connection line 13 and is thus preferably an extension of the bow 13'. The extension extends beyond the connecting, fastening and/or contact point 27, at which the radiator 17 provided for the high-frequency range, i.e. the entire radiating device, is fastened and held to the electrical connecting line 13 or the bow 13' by a bridging section, if necessary.

The extension 25 must be designed such that the antenna as a whole can be correctly tuned in the desired high frequency range. This tuning may be performed in different ways, as described below.

Fig. 2 shows a schematic top view of the extension 25 in the region of its extension beyond the connection and/or fastening point and/or contact point 27. As can be seen from the figure, this extension can in principle be configured as a guide wire, although it is preferably designed as a relatively rigid, dimensionally stable and as elastic as possible bow 13'.

In addition to the extension shown in the embodiment of fig. 1 and 2, the extension 25 can also be designed to be shorter if the extension 25 is designed to be wider than in the embodiment of fig. 1 and 2, as shown in the top view of fig. 3.

The embodiment shown in fig. 4 shows that the extension 25 starts as a separate element, preferably as an arch, from the connection or fixing point 27 and its free end increasingly extends parallel to the radiator 17. The length and width of this extension 25 can likewise be chosen differently in order to provide the required tuning of the desired high-frequency range. The embodiments shown in fig. 1 to 4 have in common that the extension 25 is free-ended electrically.

In the embodiment shown in fig. 5, the extension 25 represents a variant, i.e. the extension 25 is designed as a disk 25'. That is to say that this disk 25 'can extend not only in the direction of the connecting line 13, i.e. the bow 13', but can also be made as a planar element in the circumferential direction.

Finally, fig. 6 shows that the extension 25 can be understood and/or formed as an extension 25 relative to the first radiator 17. That is to say, according to this embodiment, the extension 25 is an axial extension 25' of the first radiator 17, preferably in the form of a bolt, i.e. as an extension to a short, electrically conductive cross-over leading from the connection point 27 of the connection line 13 to the first radiator 17.

Claims (18)

1. Antenna of a receiving and/or transmitting device for a motor vehicle, having the following features:

-with an antenna mount (3);

-with an electrical connection wire (13) arranged in the antenna mount (3) for electrical connection to a radiating device (17, 21);

-the radiation means (17, 21) comprise at least one first radiator (17);

-the radiating means (17, 21) comprise, in addition to the first radiator (17), a further second radiator (21) connected to the first radiator (17) by a latching coil (19), the latching coil (19) being open at low frequencies, and the first and second radiators (17, 19) operating as a common radiating means; at high frequencies, the locking coil (19) is locked;

it is characterized in that the preparation method is characterized in that,

-the electrical connection line (13) to the radiating means (17, 21) or the first radiator (17) itself is provided with an electrically conductive extension (25; 25', 25 ");

-the extension (25; 25 ', 25') is arranged in the antenna mount (3);

the extension (25; 25 ', 25') is designed as a branch with respect to the wiring comprising the electrical connection line (13) and the first radiator (17),

wherein the first radiator and the electrical connection line function as a common radiating means when the latching coil is latched in operation at high frequencies, and the conductive extension is designed to allow the antenna as a whole to be correctly tuned in the desired high frequency range.

2. An antenna according to claim 1, characterized in that the extension (25; 25', 25 ") is arranged in the antenna mount (3).

3. An antenna according to claim 1 or 2, characterized in that the extension (25, 25') is a directly branching extension of the electrical connection line (13), wherein the electrical connection line (13) extends beyond a connection point (27), and the connection point (27) represents an electrical connection of said electrical connection line (13) to the first radiator (17) or to a bridging section (31) leading to the first radiator (17).

4. An antenna according to claim 1 or 2, characterized in that the extension (25) is a separate element or, in the case of a kink, is designed as an extension to the electrical connection line (13).

5. An antenna according to claim 1 or 2, characterized in that the extension (25, 25') is located on the same side of the electrical connection line (13) as the first radiator (17).

6. An antenna according to claim 4, characterized in that the extension (25) is arcuate and its free end is parallel to the axial extension of the first radiator (17) with increasing lateral offset.

7. An antenna according to claim 1 or 2, characterized in that the extension (25, 25') and the electrical connection line (13) are arranged opposite the first radiator (17).

8. An antenna according to claim or 2, characterized in that the extension (25) is a planar element (25 ").

9. An antenna according to claim 1 or 2, characterized in that the extension (25) is an extension (25 ") relative to the first radiator (17) which extends beyond a connection point (27) in the direction of the bottom plate (5b) of the antenna base (3), wherein the connection point (27) represents an electrical connection of said electrical connection line (13) to the first radiator (17) or to a bridging section (31) leading to the first radiator (17).

10. An antenna according to claim 1, characterized in that the extension (25) is formed as a wire, rod or plate.

11. An antenna according to claim 10, characterized in that the wire-, rod-or plate-shaped extension (25) is long and narrow in size.

12. An antenna according to claim 1, characterized in that the electrical connection line (13) is formed in the shape of a bow (13').

13. An antenna according to claim 12, characterized in that the extensions (25; 25 ', 25 ") form a common bow (13') with the electrical connection lines (13).

14. An antenna according to claim 1, characterized in that said extension is arranged in a housing belonging to the antenna mount (3).

15. An antenna according to claim 1, characterized in that the extension (25; 25', 25 ") is arranged in an antenna mount housing (5).

16. An antenna according to claim 4, characterized in that said extension is bow-shaped (13').

17. An antenna according to claim 8, wherein said planar element is disk-shaped.

18. An antenna according to claim 8, wherein said planar element is disc-shaped.