DE10058863A1 - antenna - Google Patents

Abstract

Antenna (A), having a resonance body (AA), which has a first electrically conductive connection (AS) to a feed point (SP) on a flat module (FR4) and a second electrically conductive connection (SS) to a ground connection point (MP) on the Has flat module (FR4), wherein at least the first connection from the resonance body (AA) to the feed point (SP) is realized by a pluggable wire, as well as antenna (A '), which is formed entirely from the pluggable wire as an inverted-F antenna, which realizes an electrically conductive connection from a first contact hole in the feed point (SP ') to a second contact hole in the ground connection point (MP').

Description

The invention relates to an antenna according to the preamble of Claim 1 and an antenna according to the preamble of An Proverb 8.

In radio communication systems, messages (e.g. wise language, image information or other data) with help transmitted by electromagnetic waves. The radiation or the reception of the electromagnetic waves takes place through Antennas.

These antennas are used in radio transmission / radio temp catching devices in general on electronic printed circuit boards pen such as printed circuit boards.

An integrated antenna, for example in planar form is structured on the printed circuit board, represents a very kos an inexpensive design of an antenna.

Because electronic boards after manufacture on Functionality and quality are checked in order to ensure that the to minimize the fall rate of the final products as well as a ge It is essential to meet the required level of quality parameters Flat modules that are used in radio transmission / radio temp devices such as Bluetooth radio modules or DECT Radio parts, provided, also require radio frequency parameters (RF parameters) such as the transmission power and receiver to measure sensitivity.

As a rule, the antenna base of the integrating must be used for this th antenna from a feed line to a radio transmitter / Radio receiver module (transceiver), d. H. the line of one Feed point of the antenna to the transceiver, galvanically separated as it is necessary for the determination of the HF parameters is the measurement required for this without the influence of the Antenna carry out.

As a disconnection and re-establishment of the connection to the Transceiver is too complex or expensive, could antennas have not yet been integrated into mass-produced products push through.

Instead, pressure-contacted or Pluggable antennas (e.g. monopoles) are used while at Products with a small number of stamped and bent parts be pulled.

However, these types of antenna have a relatively large volume so that in most cases they are even out the radio transmitter / radio receiver must protrude and there especially for use in Bluetooth radio modules are suitable.

The use of inverted F antennas offers a solution to this because compared to monopole or dipole antennas they have a take up relatively small space and for this reason before Approved in mobile radio transmitters / radio receivers that are in accordance with the GSM, DECT or Bluetooth standard are used will.

In general, the Inverted-F antennas are made from a Sheet metal punched out and can therefore after measuring the RF parameters in the same way as the pluggable antennas only by pressure contact or comparable to the ones from Stamped and bent parts shaped antennas by soldering with the Transceivers are connected, the latter process happens manually and therefore higher manufacturing costs Consequence.

A disadvantage that manifests itself in pressure-contacted antennas there are the large tolerances on the contact surfaces that make antenna adjustment difficult. In addition, to the sen places the contact resistances are very high.

One possible solution to this problem is gold plating of the contact surfaces. However, gilding leads to a Hö higher costs, especially since a targeted gold plating of the con tact areas alone is very expensive and therefore in general nen the whole antenna would have to be gold-plated.

The object on which the invention is based is to provide an tenne indicate, on the one hand, very compact and inexpensive and on the other hand enables the measurement of the HF parameters.

This task is based on the preamble of claim 1 solved by the characteristic features. Furthermore, they based on the preamble of claim 8 by the know drawing features solved.

The antenna according to claim 1 has a resonance body, the first electrically conductive connection to a Spei s point on a printed circuit board and a second electrical conductive connection to a ground connection point on the Has printed circuit board, wherein at least the first connection from the resonance body to the feed point through a plug-in Wire is realized.

The antenna according to claim 8 is designed as an inverted-F antenna designed that is molded entirely from a pluggable wire is, which is an electrically conductive connection from a first Contact hole in the feed point (SP) to a second contact hole implemented in the ground connection point (MP).

A major advantage of the antenna according to claim 1 and the inverted-F antenna according to claim 8 is the low Be may be in volume, so that where there is a lack of space, for example Bluetooth products or according to the DECT standard functioning handsets, are used advantageously can. The antennas according to the invention also have has the advantage that it is compared to the tolerances on Kon clock points to a flat module or printed circuit board unemp are more sensitive. In addition, there are no ribs for support or fixation of the antennas necessary.

Another essential advantage of the antenna according to claim 1 and the inverted-F antenna according to claim 8 is the poss possibility of a measurement of high frequency parameters after Bestü to carry out a flat module.

Further advantageous refinements of the invention are shown in FIG specified in the subclaims.

An embodiment and other advantages of the invention genes are shown on the basis of the figures. Show of which:

Figure 1 is an inverted-F antenna having a bent wire inner transom as solder from a feed point to an antenna arm.

Fig. 2 shows an Iverted-F antenna with a ge made of wire curved inner crossbeam with a section running parallel to the antenna arm to;

Fig. 3: Measured course of Eingangsreflexionsfak gate when using the antenna of the invention depicted in Fig 2 in the Bluetooth frequency band (2400-2480 MHz);.

Figure 4 is a fully bent from wire Inverted-F antenna.

Fig. 5: Measured profile of the input reflection factor when using the antenna according to the invention shown in Fig. 4 in the Bluetooth frequency band (2400-2480 MHz).

In Fig. 1, an inverted-F antenna A is shown, which is arranged on a flat module FR4 of a mobile radio transmitter / radio receiver that functions according to the Bluetooth standard.

An inverted-F antenna A is known to consist of one inner crossbar SS, an outer crossbar AS and egg nem antenna arm AA, which are arranged in such a way that they have a Form F-shape.

The antenna arm AA realizes the resonance body of the antenna A, d. H. it is decisive for the electrically effective length of antenna A, which determines the resonance frequency of the antenna and compliance with them ultimately a maximum antenna gain guaranteed, responsible, while the outer transom AS a conductive connection to one with a ground potential MASSE 'connected ground connection point MP and the inner crossbar SS for the electrically conductive connection to a feed point SP, which is connected to a radio transmission / radio temp receiver module (transceiver) is connected is used.

The antenna arm AA and the outer crossbar AS are as one on a dielectric carrier substrate of the Flachbau group FR4 applied metal layer designed while the inner crossbar SS (dining arm) as a pluggable curved one Wire is designed from the feed point SP to a Plumbing point on the antenna arm AA leads and one electrically Establishes a conductive connection to the antenna arm AA, so that the Antenna shown A elements of an integrated antenna and wire antenna combined.

The contacting of the feed arm SS, d. H. the electric conductive connection to the feed point SP or solder foot point, happens via contact holes. This is understood to mean Langlö cher in the flat module or printed circuit board, the such are designed so that they are the ends of the pluggable wire can accommodate, these ends are bent such that On the one hand, they develop a resilient effect in order to become a fixie tion of antenna A after inserting the ends into the elongated hole exert a pressure on the side walls of the elongated hole can and on the other hand a conductive connection to the food point SP or plumb point guaranteed.

The length of the elongated hole in the plumb line is smaller here than to choose the width of the antenna arm to prevent that the antenna arm galvanically through the elongated hole in two separate areas is shared.

The wire-formed feed arm SS is only used after measuring the HF Parameters by plugging, d. H. Insert the wire ends into the elongated holes SP, LP, connected to the flat module FR4, so that no signals received via the antenna are sent to the Transceiver can forward and the during RF measurement un desired signals do not falsify the measurement result ses lead.

Advantages of the antenna A shown in Fig. 1 are the low cost and volume requirements, which result due to the integrated portion AA, AS of the antenna A and the possibility of this portion AA, AS, which forms almost the entire antenna A, already before to apply the measurement of the RF parameters when laying out the flat module FR4 on this flat module FR4 and to carry out the measurement without any influence of any signals received by antenna A, since the missing part of antenna A, the plug-in wire-shaped feed arm, is only after the measurement SS, on which the flat module FR4 is mounted.

The design of the feed arm SS as pluggable Wire, the feed arm SS comes at a certain height from the To lie substrate surface. Since this height is in the size on the order of just a few wire diameters, i.e. H. all in all is less than 1 mm, this does not result in any disadvantage for the antenna adjustment.

However, the relatively short length of the Be Speisearms SS, when used in the for the Bluetooth standard used frequency band at 8 mm and in the frequency band used for the DECT standard is 10 mm and therefore difficult to handle, d. H. with manual insertion the antenna is difficult to grasp.

An advantageous development that solves this possible problem is the alternative shown in FIG.

The antenna A shown in FIG. 2 is also a combined inverted-F antenna A.

In contrast to the inverted F antenna A described above, the antenna A shown in FIG. 2 is used to feed or receive RF signals via a longer feed arm SS, for example a total length of 25-30 mm. The greater length is achieved without having to extend the distance (Bluetooth standard: 8 mm, DECT standard: 10 mm) of the antenna arm A from the ground metallization MASSE ', in which the wire-bent feed arm SS, as shown, has a right-angled continuation ( Kink), which extends maximally to the end of the antenna arm AA.

The feed arm SS therefore does not end starting from the feed point SP in the solder foot of the antenna arm AA, but is so ge bent, that in the plumb line a partial section at right angles goes off to the right and parallel above the antenna arm AA ver runs and ends in a contact hole on the antenna arm AA.

Since the feed arm SS in this case from a first contact hole in the feed point to a second contact hole on the antenna ends, this affects the electrically effective Length of the antenna A, which is not worth mentioning Loss in antenna performance, for example compared to a fully planar inverted-F antenna A, leads there the detuning of antenna A caused by ei NEN wider outer crossbar AS (mass connection arm) can be matched.

The change in the width of the ground connection arm AS for antenna matching can also be used in the same way in the antenna A shown in FIG. 1 in order, for example, to achieve an impedance matching of the antenna to 50 Ω.

In the variant of the antenna A shown in FIG. 2, it must be ensured that the section of the feed arm SS running above the antenna arm AA is only galvanically, ie electrically conductive, connected to the antenna arm AA in the second contact hole. Galvanically separated above the antenna arm AA runs.

In principle, an Ab is necessary for galvanic isolation stood by a configuration of the ends of the feed arm SP guaranteed, as this is for inclusion in an elongated hole designed contact hole, are specially curved so that in introduced state no contact between section and Antenna arm AA is given.

Alternatively, the galvanic isolation can also be achieved by a at least below the section of the An Insulating layer applied close to the arm AA, preferably Lacquer layer, are brought out.

In FIG. 3, an input reflection factor S11 of the antenna A configured according to FIG. 2 is shown as the measurement result. The antenna A was dimensioned for an application in a Bluetooth radio module, the total length (sum of the sections) being 27 mm.

To carry out the measurement, the antenna A is on the food Schlitz SS linked to a "Semi-Rigid" coaxial cable and connected to a network analyzer.

The connection of the coaxial cable with the invention Antenna A is realized in such a way that the inner conductor of the Coaxial cable with the feed point SP and the outer Kabelman tel connected to the ground metallization MASS 'by soldering are.

For the connection of the antenna A in the intended for the market th product is the feed point SP, for example via a Triplate line that is below the bulk metallization MASSE 'runs to a radio transmitter / radio receiver module (trans ceiver), with the bulk metallization, for example, by a conductor path is connected to the transceiver.

Based on the values of the input reflection factor S11 at the Markers 1, 2 and 3 shown, it can be seen that a very good match for the selected frequency band is aimed, especially the adjustment at the center frequency (2450 MHz) is better than -30 dB (-31,634 dB), as with the marker 2 to recognize.

In the curve of the input ref flexion factor S11 shown in FIG. 3, it can also be seen that the inverted-F antenna A is just under 100 MHz with a "-10 dB bandwidth" known in the field as a guide value, so that a bandwidth of at least 50 MHz required by the Bluetooth specification is met.

Last but not least, the measurement results suggest that this combined antenna, where there is a lack of space, for example Bluetooth products or according to the DECT standard functioning handsets, are used advantageously can, as they are a smaller one compared to monopole antennas Volume claimed (design advantage).

Furthermore, the antenna A according to the invention is opposite pressure-contacted antennas such as punched Sheet metal antennas have the advantage over the tole satchel at the contact points is less sensitive, although this The reason is that the wire contacts in the Langlö chern are relatively well fixed, while this is the case with Druckkontak metal antennas are not given, which is a bad one Antenna adjustment.

The inverted-F antenna A 'shown in FIG. 4 is completely bent from wire and also allows the measurement of the RF parameters, since it is only mounted on the printed circuit board FR4' after the measurement has taken place and also claims a relative small volume so that it does not have to protrude from the housing (design aspect).

In detail, the antenna A 'is composed of one

• - First section TS1, which starts from a contact hole goes,
• - second section TS2, which is perpendicular to the first part piece TS1 in the direction of an end face of the flat module FR4 'goes off,
• - third section TS3, the one at right angles to the second part piece TS2 goes off at right angles so that it is parallel to the Front side of the flat module FR4 'runs,
• - Fourth section TS4, which starts at right angles from third section TS3 to the right along the front side the flat module FR4 'runs,
• - Fifth section TS5, which starts at right angles to the left going from the fourth section TS4 runs,
• - Sixth section TS6, which starts at right angles from fifth section TS5 to the left along the face runs,
• - Seventh section TS7, which is at right angles to the left going from the sixth section TS6 runs,
• - eighth section TS8, the one from the face towards the contact holes parallel to the surface of the flat building group FR4 'runs,
• - ninth section TS9, which is starting from the eighth part piece TS8 goes off at right angles that it is in the con clock hole opens

together, the wire being a common one Steel wire with a diameter of 0.2 mm. Through this sufficient stability is guaranteed.

The antenna arm AA 'of this inverted-F antenna A' results therefore from the sections three to seven TS3. . .TS7, while the inner crossbeam SS 'through the second section TS2 and the outer crossbar AS 'through the eighth section TS8 ge forms is.

As a first alternative, it is conceivable that the third Part TS3 is omitted, so that the fourth part TS4 di right-angled from the second section TS2 Right along the face of the flat module FR4 'ver runs and the antenna arm AA 'of the antenna A' only through the fourth, fifth, sixth, seventh section TS4. . .TS7 comp will be.

This alternative simplifies the production and thus leads also to minimize costs.

In the case of the inverted-F antenna AA 'described, there are two opposite sides of the flat module FR4 'arranged Umbrella pots, as they are, for example, in a Bluetooth Dongle for shielding the high frequency band and the ba sisbandes are used according to Bluetooth, ge as ground uses.

For this purpose, the outer crossbar AS 'is attached to the one with the screen pot electrically connected ground connection point MP ' and the inner cross beam SS 'connected to the feed point SP' connected to the antenna, with the option of using the antenna A 'both by plug contacts, d. H. by inserting it into contact holes, designed for example as elongated holes are to connect.

These two forms of contact have the advantage of being one bring about contact insensitive to tolerances, see above that this results in a relatively low contact resistance.

As a further alternative, it is conceivable that the second part piece TS2 and the eighth section TS8 not from the first part piece TS1 or ninth section TS9 go off at right angles, but the second and the eighth section TS1, TS8 respectively continue so that the antenna arm AA 'is no longer parallel lel runs to the front, but parallel to the surface the flat module FR4 'runs what, for example, design brings advantages (volume, etc.).

For inclusion in the contact holes designed as elongated holes The first section TS1 and the ninth section are essential TS9 designed in such a way that, on the one hand, it is stable in the Contact hole come to rest and on the other hand a conductive one Ensure connection.

In addition, you can use the second section TS2 and the eighth Design section TS8 in such a way that the tolerances of the Distance from antenna arm AA 'can be minimized by placing it noses that prevent the antenna ends from closing be inserted deep into it.

As a further development of this alternative, it is beneficial as a Counter potential to the antenna arm AA 'one on the surface the metal layer applied to the flat module FR4 '(Masseme tallisierung MASSE '), which is below the ante nenarms AA 'comes to rest and thus the use of the umbrella pots replaced for this function.

Regardless of the chosen counterpotential, there are - in contrast to an integrated antenna - in the antenna according to the invention A 'the inner crossbar TS2 and the outer crossbar TS8 perpendicular to the surface of the counter potential, against it runs through the loop TS3. . .TS7 delimited area of the Antenna arm AA 'parallel to the surface of the counter potential, while with an integrated inverted-F antenna se the surface of the antenna arm laterally parallel to one Side of a ground plane.

This further training also has the advantage that it is one-sided assembled flat modules FR4 ', one of the assembled side opposite side completely metallized and the An tenne is mounted on this side, so for the design or layout of the side to be assembled an additional Degree of freedom arises

This enables the antenna A 'to be positioned almost at any position on the flat module FR4 'below the requirement that there is sufficient distance to the mass metallization tion MASS 'is observed. For one application in one for The frequency band provided by the Bluetooth standard is a Distance between 4 to 8 mm, for example 7 mm, required lich.

The antenna A 'can be adapted to a 50 Ohm line at all further training by varying the distance between the antennas nenarms AA 'optimized by the counter potential (ground potential) will.

As an alternative or in addition, the adaptation can also be carried out using Vari ation of the distance between the two contact holes who carried out the. This brings slight advantages in terms of the necessary dense volume.

An adaptation of the antenna A 'to the desired frequency band is achieved by varying the length of the fifth section TS5 achieved.

As is known, a resonance frequency of the antenna A 'in primarily over an electrically effective antenna length AA ' certainly.

The antenna length should be in the order of magnitude of one quarter of the wavelength, which result from the frequency range in which the antenna A 'is to be used as well as the one to he waiting environmental influences.

For example, a quarter-wave length of 31 mm is assumed for use in free space in the frequency band intended for Bluetooth. Due to the environmental influences to be expected for this use, this length is actually smaller and is only 23 mm for the antenna A 'shown in FIG. 4 Darge.

In the inverted-F antenna A 'shown in FIG. 4, which is completely bent from wire, this length is essentially determined by the length of the sixth section TS6.

Across the width of the antenna arm AA ', i.e. H. by the length of the fifth section TS5, which is the distance of the fourth Section TS4 and the sixth section TS6 determined, as well its distance to the mass metallization MASS 'can be found in set the bandwidth in a certain range.

It is also advantageous to have the antenna A 'with a identifier to be provided, so that with a manual plugging process Confusion regarding the correct orientation when entering lead to avoid the plug-in antenna A '.

Another major advantage of the labeling is that the manual plug-in process can also result in confusion with others Antennas can be prevented.

It would be conceivable that this would be an additional section that at an angle of 45 degrees from the sixth leg TS6 runs to the seventh section TS7, is used.

Alternatively, you could also use the TS5 section as an arch shape or have a tip shaped.

If the antenna A 'is used mechanically, it is from Advantage of designing the marking in such a way that the for a receptacle in elongated holes formed ends of the wire divide A 'against each other by a certain angle, for example wise 90 degrees, are twisted. To do this, the elongated holes must be ent speaking, be twisted by the same angle.

Through this training it is achieved that a Bestü machine that accidentally ended up with the wrong antennas the fact is that it does not even lead into the FR4 'flat module so that the mix-up can be quickly identified can. But also mix-ups with manual loading cuttings are minimized.

The choice of the angle of 90 degrees also guarantees ai ne increase in stability or fixation of antenna A ' on the flat module FR4 '.

In FIG. 5, an input reflection factor S11 of the antenna A 'described in FIG. 4 with the following dimensions is shown as the measurement result

l 23 mm H 7 mm d1 4 mm d2 5 mm

shown, where
l: length of antenna arm AA '
h: distance to bulk metallization MASS '
d1: Width of the antenna arm AA '(= length of the fifth section TS5)
d2: distance between the contact holes
describe.

This dimensioning was made for one application in one Bluetooth radio module selected.

The antenna A 'is on the storage unit to carry out the measurement seschlitz SS 'connected to a "semi-rigid" coaxial cable and connected to a network analyzer.

The connection of the coaxial cable with the invention Antenna A 'is realized in such a way that the inner conductor of the Coaxial cable with the feed point SP 'and the outer cable jacket connected to the ground connection point by soldering are.

For the connection of the antenna A in the intended for the market th product is the feed point SP 'for example via a Triplate line that is below the bulk metallization MASS 'or outside of the one used as the earth potential Umbrella pots runs to a radio transmitter / radio receiver module (Transceiver), with the bulk metallization for example is connected to the transceiver by a conductor track.

From the curve of the input ref flexion factor S11 shown in FIG. 5 it can also be seen that the inverted-F antenna A 'with the known "-10 dB bandwidth" is just under 100 MHz, so that one according to Bluetooth -Specification required bandwidth of at least 80 MHz met.

Based on the values of the input reflection factor S11 at the Markers 1, 2 and 3 shown, it can be seen that a very good match for the selected frequency band is aimed, especially the adjustment at the center frequency (2450 MHz) with -36.471 dB is significantly better than -30 dB, like can be seen at marker 2.

These measurement results lead to the conclusion that this is fully Antennas A 'constantly bent from wire are also inserted there can be placed where there is a lack of space, as with for example in Bluetooth products or according to the DECT standard working handsets.

Furthermore, the antenna A 'according to the invention is also in Compared to pressure-contacted antennas such as punched sheet metal antennas against the tolerances on the con clock points less sensitive, and this also has to be done with it reason is that the wire contacts in the elongated holes rela tiv are well fixed, while pressure-contacted Sheet metal antennas are not given, which is a bad antenna adjustment has the consequence.

Due to the stable fixation through the elongated holes in connection tion with the small dimensions of the antenna A, one can on the ribs for additional support or fixation of the Do not use antenna A.

Claims (15)

1. Antenna (A) having a resonance body (AA), the ei ne first electrically conductive connection (SS) to a feed point (SP) on a flat module (FR4) and a second electrically conductive connection (AS) to a ground connection point (MP ) on the flat module (FR4), characterized in that at least the first connection from the resonance body (AA) to the feed point (SP) is realized by a plug-in wire. 2. Antenna (A) according to claim 1, characterized in that it is designed as an inverted-F antenna, wherein the

• a) sound box (AA) an antenna arm (AA),
• b) the first connection (SS) an inner crossbeam (SS) as well
• c) the plug-in wire corresponds to an outer crossbar (AS) of the inverted-F antenna (A).

3. Antenna (A) according to claim 2, characterized in that

• a) the antenna arm (AA) and the outer crossbar (AS) of the inverted-F antenna (A) are applied as a metal layer on the flat assembly,
• b) the inner crossbar (SS) is realized from a first contact hole in the feed point (SP) to a second contact hole on the antenna arm (AA).

4. Antenna (A) according to claim 3, characterized in that the second contact hole in a solder foot point on the An arm (AA) comes to rest. 5. Antenna (A) according to claim 3, characterized in that

• a) the second contact hole comes to lie on any position of the antenna arm (AA),
• b) the plug-in wire is bent in such a way that a first section (T1) runs perpendicularly from the first contact hole to the antenna arm (AA) and from this position a second section (T2) to the second contact hole runs parallel to the antenna arm (AA) ,
• c) the inner crossbar is inserted into the first contact hole and the second contact hole in such a way that the second partial section comes to lie galvanically separated from the antenna arm (AA).

6. Antenna (A) according to claim 5, characterized in that at least the part of the antenna arm (AA) that is below half of the second leg is located by an elect risch insulating layer is covered. 7. antenna (A) according to one of claims 2 to 5, characterized ge indicates that the width of the outer crossbeam (AS) is designed such that an impedance matching of the inverted-F antenna (A) to one of the inverted-F Antenna (A) connected cable is realized. 8. antenna (A '), characterized in that it is considered full Inverted-F- continuously formed from a pluggable wire Antenna (A ') is designed, the wire being an e Electrically conductive connection from a first contact hole in the feed point (SP ') to a second contact hole in the Ground connection point (MP ') realized. 9. antenna (A ') according to claim 8, characterized in that the pluggable wire is bent such that

• a) a first section (TS1) and a second section (TS2) realize the inner crossbeam,
• b) the antenna arm (AA) at right angles from a first end of the inner crossbar (SS ') at right angles to a second end of the outer crossbar (AS') as a loop from a third section (TS3), a fourth section (TS4), a fifth section (TS5), a sixth section (TS6) and a seventh section (TS7), which is designed in such a way that a part of the loop (TS3, TS4) leading away from the inner crossbeam and a part of the loop (TS3, TS4) leading to the outer crossbeam ( TS6, TS7) overlap without contact,
• c) an eighth section (TS8) and a ninth section (TS9) realizes the outer crossbeam (AS '),
• d) inner crossbeam, outer crossbeam and the loop form an F-shape at least in one dimension.

10. Antenna (A ') according to claim 9, characterized in that that the third section (TS3) is omitted, so that the Loop through the fourth section (TS4), the fifth Section (TS5), the sixth section (TS6) and the seventh section (TS7) is realized. 11. Antenna (A ') according to one of claims 8 to 10, characterized characterized in that a length of the inner crossbeam (SS ') and the outer crossbeam configured in this way is that an impedance matching of the inverted-F antenna (A ') connected to one of the inverted-F antenna (A') nen line is realized. 12. F antenna (A ') according to one of claims 8 to 11, characterized characterized in that a distance of the first contact hole and the second contact hole is designed in such a way that an impedance matching of the inverted-F antenna (A ') to one connected to the inverted-F antenna (A ') Line is realized. 13. Antenna (A ') according to one of claims 8 to 12, characterized marked that the length of the fifth section (TS5) is designed in such a way that an adaptation to ei NEN frequency range is realized. 14. Antenna (A ') according to one of claims 8 to 13, characterized marked that they have funds in support of one having the correct position plugging. 15. Antenna (A ') according to one of claims 8 to 14, characterized characterized in that the wire is designed as a steel wire is tet.