EP1749331B1 - Mobile radio antenna with beam-forming element - Google Patents

Abstract

An improved antenna arrangement is distinguished by the following features: the passive and electrically conductive element comprises a beamforming element ( 25 ), the at least one beamforming element ( 25 ) that is provided is subdivided into at least two sections, specifically a mounting section ( 25 a) and an operating section ( 25 b), which is connected to the area of the mounting section ( 25 a) located further away from the reflector ( 1 ).

Description

Antenna according to the preamble of patent claim 1.

Antennas, in particular in the form of stationary mobile radio antennas are well known.

From the EP 1 082 781 B1 For example, an antenna array with a plurality of vertically stacked primary radiator modules is known which radiate and receive in a position, for example, with vertical orientation. The individual radiating element can consist of dipole radiators or dipole radiator arrangements.

In addition, antennas, in particular in the form of antenna arrays, which can transmit and / or receive in two mutually orthogonal polarization planes are also known. Such dual polarized antennas are for example from DE 198 60 121 A1 known. Preferably, the two mutually perpendicular polarization planes are rotated at a 45 ° angle relative to the horizontal (or vertical). This is also common spoken of a so-called X-polarization or orientation of the radiator elements.

In these antennas or antenna arrays, dipole radiators are again preferably used, for example, cross-shaped dipole radiators or dipole squares. In addition, so-called vector dipoles come into consideration, as they basically from the DE 198 60 121 A1 are known. These dipole structures are a dual-polarized radiator arrangement which is constructed in the electrical manner in the manner of a crossed dipole and is more closely approximated in terms of construction to a quadratic structure.

Beam-shaping elements for influencing the radiation pattern are basically, for example, from US 5,629,713 A known. It is a horizontally polarized antenna which symmetrically to the central longitudinal axis on each left and right on a horizontally oriented dipole radiator so-called parasitic radiator shows, which are also designed dipolstrahlerähnlich, namely with a central support column, of the parasitic in a horizontal plane to the left and right Stand aside dipole halves. These dipole halves or dipole arms extend from their middle fastening and holding point obliquely downwards in the direction of the reflector plane, in such a way that an angle of 90 ° is formed between the two reflector halves.

In addition to such beam-shaping elements, pure decoupling elements are also known in the prior art which are not beamforming, in particular taking into account a far-field diagram, but merely decoupling between serve two perpendicular polarizations.

Such decoupling elements for decoupling between two polarizations in the case of a dual-polarized antenna are known, for example, from US Pat WO 01/04991 A1 or the WO 98/01923 A1 known.

A generic radiator arrangement for the use of patch antennas is for example also from WO 98/36472 A1 to be known as known. Described is an antenna with horizontally and vertically aligned patch elements, which in each case in the horizontal direction outside relative to the reflector plane in the radiator direction elevating path sections are assigned. In one embodiment, these web portions may also be provided with opposite outwardly extending wing members having a length in the vertical direction, corresponding to the length of the webs carrying them and rising from the reflector. In a further embodiment dual polarized patch radiators are shown, which are aligned in the polarization plane at a + 45 ° or -45 ° angle to the horizontal or vertical.

Starting from these generally known radiators and radiator arrangements, it is an object of the present invention to provide an improved antenna, in particular in the form of a dual-polarized, stationary antenna for a base station for the mobile radio area, which is equipped with a device for performing a beam shaping. In particular, it should be possible according to the invention to be able to make an improved shaping of far-field diagrams for such antennas.

The object is achieved according to the features specified in claim 1. Advantageous embodiments of the invention are specified in the subclaims.

In the context of the present invention, it is now possible, by means of measures additionally provided according to the invention, specifically to improve the shaping of far field diagrams on corresponding antennas.

The invention can be used in a radiator arrangement which radiates in two polarization planes. The invention has advantages especially in a dual polarized antenna. In this case, the invention is not limited to a single-band antenna, but can also be implemented and implemented in a dual-band or generally a multi-band antenna.

In this case, the present invention is also characterized by the fact that the desired improvement explained by comparatively simple and inexpensive measures can be realized. Furthermore, the measures that effect the improvement can be used selectively and, above all, assigned to individual radiators or radiator elements.

The measures according to the invention can be used and used not only in dual-polarized antennas with dipole radiators but, for example, also in patch antennas. In principle, there are no restrictions on certain emitter shapes.

The solution according to the invention is characterized inter alia by the fact that at least four passive electrically conductive Elements are provided which are at least indirectly galvanically connected to the electrically conductive reflector or capacitively coupled.

The inventively provided at least four passive electrically conductive elements, which are additionally provided for at least one radiator or a radiator arrangement, are divided into at least two parts and each comprise a support portion, which preferably emanates from the reflector and electrically connected thereto or capacitively coupled and preferably at least indirectly mechanically connected to the reflector. On the side facing away from the base of the support portion (the lying in the vicinity of the reflector or the reflector plane) side of the support portion, a so-called active portion is then provided, which is preferably arranged in a direction parallel to the reflector plane. However, this effective portion may be arranged at least in an angular range of less than ± 20 °, preferably less than ± 10 ° deviating from the orientation of the reflector plane, ie extend at an angle to the reflector plane.

According to the invention it is provided that this effective section has a length of preferably 0.2 λ to 1.0 inclusive λ, where λ corresponds to the wavelength in the frequency range or frequency band to be transmitted, preferably the average wavelength of the frequency range to be transmitted. The active plane itself can be arranged above or below the radiator plane of the active radiator to be influenced. A restriction is not specified here. However, the length of the support portion which is greater than the distance of the active portion of the passive electrically conductive element to the reflector, do not exceed a maximum value corresponding to twice the aforementioned wavelength.

According to the invention, the at least four beam-shaping elements are designed in such a way that the at least two pairs of support sections run apart from the plane of the reflector in the plane of action and the effective sections adjoining the upper end of the support section converge again.

Preferably, the material thickness or the transverse dimensions should be transverse to the direction of extension of the electrically conductive additionally provided Strahlformerelementes less than 0.1 of the operating wavelength, preferably the average operating wavelength of the element to be influenced.

Basically, in the art, for example, from the WO 01/04991 A1 Mobile radio antennas known which comprise decoupling elements which are rod-shaped and extend substantially perpendicular to the reflector plane. These passive, electrically conductive coupling elements are galvanically connected to the reflector plate or capacitively coupled at its base to the conductive reflector. However, these elements are electrically conductive passive decoupling devices to provide improved decoupling between two dual polarized radiators.

Purely passive decoupling structures serving only for decoupling between two polarizations are also known from US Pat WO 98/01 923 A known.

This may be a rod-shaped or cross-shaped decoupling structure, which is arranged between two dual-polarized radiators, in order to improve or to effect a decoupling between the two polarizations in the case of a dual-polarized antenna.

The aim of the present invention, however, is not to ensure a decoupling element for improving the decoupling between two dual-polarized radiation planes. Rather, the aim of the present invention is to modify and shape the radiation pattern as desired, especially in far-field viewing. Therefore, it is also provided according to the invention that the active portion of the electrically conductive beam-forming element according to the invention extends at least substantially or approximately in the above-mentioned preferably parallel to the reflector plane extending working plane in the polarization direction of the element to be influenced. Again, deviations of preferably less than 20%, in particular less than 10%, can also bring about the desired inventive success.

Figur 1:

eine schematische räumliche Darstellung einer Antennenanordnung mit einem Dipolstrahler und einem Strahlformungselement, welches nicht Teil der Erfindung ist;

Figur 2:

eine schematische Frontansicht längs der Pfeildarstellung A in Figur 1;

Figur 3:

eine zu Figur 1 und 2 unterschiedliche Antenne mit einer erfindungsgemäßen Anordnung von zwei Strahlformungs-Elementen zur Formung des Strahlungsdiagramm für jede Polarisation;

Figur 4:

eine entsprechende Darstellung zu Figur 3 mit einer anders ausgebildeten dualpolarisierten Strahleranordnung;

Figur 5:

eine entsprechende perspektivische Darstellung einer dualpolarisierten Zwei-Band-Antennenanordnung mit der in Figur 4 wiedergegebenen Strahlformungs-Einrichtung;

Figur 6:

eine schematische Draufsicht auf das Ausführungsbeispiel gemäß Figur 5; und

Figur 7:

eine Querschnittsdarstellung quer zur Vertikalausrichtung des Reflektors in Figur 5 durch das mittlere Strahlerelement und das erfindungsgemäße Strahlformungs-Element.

The invention will be explained in more detail with reference to embodiments. Show in detail:

FIG. 1:

a schematic spatial representation of an antenna arrangement with a dipole radiator and a beam-shaping element, which is not part of the invention;

FIG. 2:

a schematic front view along the arrow A in Figure 1;

FIG. 3:

1 to 2 different antenna with an inventive arrangement of two beam-forming elements for forming the radiation pattern for each polarization;

FIG. 4:

a corresponding representation of Figure 3 with a differently designed dual-polarized radiator arrangement;

FIG. 5:

a corresponding perspective view of a dual-polarized two-band antenna arrangement with the reproduced in Figure 4 beam-forming device;

FIG. 6:

a schematic plan view of the embodiment of Figure 5; and

FIG. 7:

a cross-sectional view transverse to the vertical orientation of the reflector in Figure 5 through the central radiator element and the beam-shaping element according to the invention.

Hereinafter, a first example of an antenna will be explained with reference to Figs. 1 and 2, which is not part of the invention.

The antenna according to FIGS. 1 and 2 comprises a reflector arrangement or a reflector 1, which is conductive.

Between the two longitudinal side regions 3, a radiator arrangement 5 is preferably provided in the middle region, which in the example shown consists of a single radiator 5a. The single radiator 5a is in this example formed from a simple polarized dipole radiator which radiates in a plane perpendicular to the plane of the reflector 1 (ie, sends and / or receives).

The reflector 1 is designed substantially flat at least in the area of the radiator arrangement 5. In the example shown, reflector webs or wall sections 1 'projecting transversely to the reflector plane and extending in the beam direction are provided on the longitudinal side regions 3. These need not necessarily be arranged on the outer lateral end of the reflector 1, but may also be provided lying further inside. In addition, additional webs or outer side boundary sections may be arranged, as for example from the Vorveröffentlichungen WO 99/62138 A1 of the US 5,710,569 A or the EP 0 916 169 B1 is known. The mentioned webs 1 'can be aligned at right angles to the reflector plane, but also in a different, oblique angle.

The illustrated antenna arrangement is usually set up so that the reflector 1 extends lying in a vertical plane, while the mentioned in the side region arranged webs 1 'also extend in the vertical direction. Notwithstanding the example shown, the linearly polarized radiator or the linearly polarized radiator arrangement could also be oriented differently, for example in such a way that the plane of polarization does not lie in a horizontal plane but deviates from it in another plane, for example in the vertical direction. In this case, the radiator arrangement would then be aligned rotated by 90 ° with the Abstrahlformungselement still to be explained below, so that the dipole radiator then parallel to the laterally provided webs 1 'extends.

The radiator 5 is constructed essentially in a known manner and comprises two dipole halves 15, which is held in the form of a balancing 17 via a dipole support device. In the example shown, the radiator arrangement is arranged in a field 19 on the reflector 1, which is designed at least approximately square in plan view and has a circumferential ridge or a circumferential wall 21.

In particular for the formation of a radiation pattern, especially in the case of far-field viewing, but also for improving the adaptation of the active element, that is to say the radiator, a passive electrically conductive element 25 is now provided, which is also referred to below as a beam-shaping element 25. In the example shown, this beam-shaping element 25 is at least approximately divided into two sections, namely a support section 25a and a so-called active section 25b. However, it is noted that the support portion 25a, which is like the active portion 25b electrically conductive or provided with an electrically conductive surface or partially with an electrically conductive surface, also contributes to the overall effect, the effect is therefore not triggered alone on the so-called active portion 25b ,

The support section 25a is preferably arranged directly electrically galvanically on the reflector 1 and connected to this electrically and preferably mechanically. The connection can also be capacitive, so that the support portion 25a and in particular its base 25c is capacitively coupled to the reflector 1. The mechanical and / or electrical-galvanic or electrically capacitive connection or coupling can but with the reflector 1 also indirectly take place by a corresponding connection via additional intermediate element or with the base of the balancing 17 is made. In the example shown, a conductive ring structure 29 is provided on the reflector 1 and at the base of the symmetrization 17 on which the foot portion of the support portion 25a is mechanically and electrically connected (or in the case of capacitive coupling capacitively coupled here with the interposition of an insulator or dielectric is).

As can be seen, in particular, from the side view according to FIG. 2, the so-called active section 25b adjoins the upper end of the support section 25a at a so-called transition region or transition point 25d, which preferably lies in a working plane WE. This active plane WE is preferably aligned parallel to the plane of the reflector 1, i. are arranged at least parallel to that reflector portion in the region of the radiator or the radiator-forming element. However, the active section 25b or its essential or predominant parts need not necessarily be aligned exactly parallel to the respective reflector section or reflector 1. Deviations from the relevant section of the reflector of preferably less than ± 20 °, in particular less than ± 10 ° still lead to the desired effects.

Due to the design and arrangement of the support section, the length of the support section from the lower foot 25c to the level of the active plane, ie in particular to the transition region 25d longer than the distance between the reflector plane RE and the active plane WE. The support portion 25a should be greater than the distance of the active plane WE to the reflector plane RE at least in the area However, the length of the carrier should preferably not exceed twice the wavelength (2λ) of the associated operating center wavelength of the emitter array 5, this wavelength being at the lower or upper end of the frequency band to be considered, preferably corresponding to the wavelength lying in the middle frequency band.

The length of the effective section 25b in the direction of the active plane WE should preferably correspond to 0.2 λ to and including ≦ 1.0 λ, based on the operating wavelength (in particular the mean operating wavelength of a frequency band to be transmitted).

The plane of action itself may be both below, above and at the level of the active radiating element, i. the dipole halves 15 are. In this case, the active plane (in particular in the region of the effective section 25b) should be at a distance of preferably 0.2 λ to 1.5 λ inclusive, where λ again corresponds to the wavelength of the frequency band to be transmitted, preferably the central wavelength of the frequency band to be transmitted.

It can also be seen from the example according to FIGS. 1 and 2 that the active section 25b is arranged co-polar, that is to say it is aligned in the direction of the plane of polarization. In the example according to FIGS. 1 and 2, therefore, the polarization plane PE remains perpendicular to the reflector 1, with the dipole halves 15 lying in this plane of polarization PE and .alpha there in the preferred embodiment ultimately also the support portion 25a and the effective portion 25b of the beam-shaping elements 25 come to rest.

It can also be seen from the example shown that two beam-shaping elements 25 are provided for the only dipole radiator provided, which extend symmetrically to a plane perpendicular to the reflector 1 and perpendicular to the polarization plane PE and through the center of the radiator arrangement 5.

In the following, reference is made to an exemplary embodiment according to FIG. 3.

In this embodiment, it is again a radiator assembly 5, which in this embodiment, however, consists of two individual dipole radiators 5a and 5b, which are designed in the manner of a dipole cross. The two dipole radiators oriented perpendicular to one another are preferably arranged rotated at an angle of + 45 ° with respect to the horizontal or vertical plane, so that this radiator arrangement comprises two polarization planes PE that are perpendicular to each other in + 45 ° and -45 °.

In this arrangement, one beam-shaping element 25 is now provided for each dipole half, i. two beam shaping elements according to the invention for each polarization plane PE.

The associated support sections 25a are preferably each again in one of the respective polarization planes of the associated dipole arrangement. The at the top At the end of the respective support section 25a subsequent active section 25b is aligned to the plane of polarization, in which the associated support section 25a is arranged to extend in a plane perpendicular to polarization, ie aligned parallel to the other polarization plane. The length and size ratios are comparable to the embodiment of Figure 1 and 2. In this arrangement, so the two side support portions 25a extending from the reflector plane starting in the plane of action WE apart, in which case the adjoining the upper end of the support portion 25a effective portions 25b in a common operating plane WE lying back to run towards each other and in the illustrated embodiment in a small distance A to each other end.

In Figure 1 and 2 as well as in Figure 3, the arrangement may also be such that the support portion 25a is not necessarily in each associated polarization plane PE, but between its base and its transition region to the associated active portion 25b and from this Level out or is arranged at an angle at right angles to the polarization plane. Deviations of less than ± 20 °, in particular less than ± 10 ° are possible. More importantly, the effective portions 25b each extend parallel to an associated polarization plane PE (with lateral distance to the polarization plane of the associated radiator), whereby deviations of less than ± 20 °, in particular less than ± 10 ° with respect to the polarization plane are possible , Deviations of the active plane WE or the orientation of the active sections 25b in relation to the same may also occur in the same area Move reflector plane, so this deviation is less than ± 20 °, in particular ± 10 °, should be.

A different embodiment is shown again with reference to FIG. 4, which differs from that according to FIG. 3 in that a square compact radiator is used as the cross-shaped polarized radiator arrangement 5. This is a radiator arrangement, as in principle from the DE 198 60 121 A1 is known. The outer corners of the conductive structure can be open (as in the DE 198 60 121 A1 has been described) or by means of an insulator or dielectric or electrically closed. Reference is here made to known solutions. Also in this case the polarization planes are oriented at an angle of + 45 ° and -45 °, respectively, with respect to a horizontal or vertical. The electrically cross-shaped dipole radiator structure according to FIG. 4 is a radiator arrangement, which is sometimes referred to as a vector radiator or a cross-vector radiator or radiator arrangement.

It is merely shown with reference to FIGS. 5 to 7 that, for example, a dual-band antenna array, in particular for a stationary mobile radio antenna, may comprise a conventional radiator arrangement with radiators 115 for a higher frequency band and radiator arrangements 215 for transmission in a lower frequency band. The radiator arrangement 215 for transmission in the lower frequency band consists in each case of two pairs of dipoles 215 'and 215 "arranged parallel to one another and arranged in such a way that a dipole square is formed Emitter provided in the higher frequency band whose dipole radiator elements lie on a plane closer to the reflector plane RE than the dipole elements 215 'and 215 "of the radiator elements radiating in the higher frequency band The radiator arrangement 215 is provided for transmission and / or reception in the lower frequency band ( this may preferably be a frequency band, which is operated, for example, at half the frequency with respect to the frequency in the higher frequency band, but a limitation on this is not absolutely necessary.) Both the internal radiators 115 and the external radiators 215 are so arranged and aligned so that both radiator types radiate in two mutually perpendicular planes of polarization, which are aligned in the embodiment shown at an angle of + 45 ° and -45 ° relative to a horizontal or vertical plane.

For the transmission in the higher frequency band, an additional radiator arrangement 115 is then arranged between the centers of the two radiator arrangements 215 on the reflector 1 (in particular when transmitting in a frequency band twice as high as the low frequency band, the beam sequence and thus the radiator spacing are between the radiators for the higher frequency band only half as large as for the lower frequency band). If, for the central emitter array 115, that is to say for the emitter array 115 respectively situated between two emitter array 215 provided for the low frequency range, those beam shaping elements 25 are used, as described in the exemplary embodiment according to FIG. 4, a structure results according to the example according to FIG. 5.

From the corresponding plan view according to FIG. 6, it can be seen that the beam-shaping elements 25 are shaped with the respective support section 25a and the adjoining effective section 25b in this exemplary embodiment in such a way that the respective support section 25a has a part of the support or the symmetrization 17 corresponding dipole arrangement for radiating in the lower frequency band radiator assembly 115 and then the support portion 25a subsequent effective portion 25b of a respective associated dipole half 215 'of an adjacent radiator assembly 215, that is preferably aligned parallel thereto. In this case, therefore, the support portion 25'a substantially in the same length, the same orientation and slope parallel to the one part of the support portion or the symmetrization 17 'and the further support portion 25 "a in corresponding, in plan view offset by 90 ° orientation and otherwise the same pitch and similar or comparable length as the associated part of the support section or the symmetrization 17 "of the radiator 215 arranged and positioned, ie also at the same distance from the vertical side edge 1 'of the reflector 1 or in the same side distance from one of the middle perpendicular to the reflector plane extending vertical plane etc. In this embodiment, therefore, the effective portions 25b are arranged in a plane of action WE parallel to the reflector, in which also come the dipole elements 215 'provided for the lower frequency band dipole radiator 215 to lie. The length of the effective portions 25b corresponds approximately to the length of the respective dipole half for the lower frequency band or deviates by less than 40%, in particular less than 30%, less than 20% or even less than 10% thereof. Finally, the arrangement of the effective sections in Relation to the reflector comparable to the arrangement of the dipole halves of the adjacent radiators for transmission in the low frequency band. In other words, the effective sections are arranged above the reflector so that, for example, the dipole half 215 "starts and ends at approximately the same distance from the adjacent side boundary in 1 'of the reflector, in which also the corresponding parallel dipole half 215" of the radiator element for the higher frequency band also starts or ends. Correspondingly, the same relative position in the transverse direction of the reflector is arranged correspondingly for the respective second active section 25b 'perpendicular thereto, like the parallel dipole half 215' of an adjacent radiator for the lower frequency band.

In this way, particularly favorable results can be achieved, since not only is it possible to shape the far-field diagram in one but also in the case of multiple polarizations and, by using the corresponding beam-shaping elements 25, also to improve the isolation between the polarizations and thus to improve the adaptation of each active for the higher frequencies element is feasible.

Claims (14)

1. Antenna having the following features:

   - having a reflector (1),

   - having an antenna element arrangement which has at least one antenna element (115, 215) for operation in two polarization planes (PE),

   - having at least four passive, electrically conductive elements, which are at least indirectly electrically conductively connected or electrically capacitively coupled to the reflector (1) ,

   characterized by the following further features:

   - the passive and electrically conductive elements comprise beamforming elements (25),

   - the at least four beamforming elements (25) that are provided are subdivided into at least two sections, specifically a mounting section (25a) and an operating section (25b), which is connected to the area of the mounting section (25a) located further away from the reflector (1),

   - the operating section (25b) lies on an operating plane (WE), which runs parallel to the reflector (1) , or differs from being parallel to it by less than ± 20°, at least in the area of the beamforming element (25) and/or of the antenna element (15, 115, 215) to be influenced via it,

   - the length of the operating section (25b) is between 0.2 λ and 1.0 λ,

   - the operating section (25b) or the operating plane (WE) is at a distance from the reflector (1) in the area of the operating section (25b), which distance is greater than or equal to 0.2 λ and is less than or equal to 1.5 λ,

   - the length of the mounting section (25a) is shorter than twice the wavelength 2 λ, where lambda (λ) is a wavelength of the frequency band to be transmitted,

   - the operating section (25b) is aligned parallel to (or differs by less than ± 20° from being parallel to) the associated polarization plane (PE) of the antenna element (115, 215) to be influenced via it,

   - the length of the mounting section (25a) is greater than the distance between the operating section (25b) and the reflector (1), and

   - the at least four mounting sections (25a) which are provided are arranged with the associated operating sections (25b) such that in each case two mounting sections (25a) run away from one another in the direction of the operating plane (WE), starting from the plane of the reflector (1), and the operating sections (25b) which are adjacent to the upper end of the mounting sections (25a) run towards one another again, on a common operating plane (WE).
2. Antenna according to Claim 1, characterized in that the material thickness or the cross-sectional size of the mounting section (25a) and/or of the operating section (25b) is less than 0.1 λ, where lambda is the wavelength of the frequency band to be transmitted.
3. Antenna according to Claim 1 or 2, characterized in that the mounting section (25a) lies at least essentially on a polarization plane (PE) of the antenna element arrangement.
4. Antenna according to one of Claims 1 to 3, characterized in that the foot point (25c) of the mounting section (25a) as well as its transition area or transition point (25d) which is located at a distance from the reflector (1) and at which the operating section (25b) starts, is located at least approximately on the same polarization plane (PE) as the antenna element (15, 115, 215).
5. Antenna according to one of Claims 1 to 4, characterized in that at least two beamforming elements (25) are provided for each polarization.
6. Antenna according to one of Claims 1 to 5, characterized in that at least one operating section (25b) runs parallel to one of the two mutually perpendicular polarization planes (PE) and at least one further operating section (25b) runs parallel to the other polarization plane (PE).
7. Antenna according to one of Claims 1 to 6, characterized in that the mounting section (25a) which is associated with a beamforming element (25) is parallel to one of the two mutually perpendicular polarization planes (PE), and in that the operating section (25b) which is held via this mounting section (25a) runs parallel to the other polarization plane (PE), which is at right angles thereto.
8. Antenna according to one of Claims 1 to 7, characterized in that the operating section (25b) is aligned at right angles, or at least approximately at right angles, to the mounting section (25a) on which it is mounted.
9. Antenna according to one of Claims 1 to 8, characterized in that, in a plan view of a dual-band or multiband antenna, at least parts of the operating sections (25b) are arranged such that they are located at least approximately at the same lateral distance from the side boundary (1') of the reflector (1) as the associated parallel dipole halves (215', 215") of adjacent antenna elements (215) for transmission in a lower frequency band.
10. Antenna according to one of Claims 1 to 9, characterized in that the operating sections (25b, 25b', 25b") are arranged parallel to the dipole halves (215', 215") of adjacent antenna elements (215) which are provided for transmission in a lower frequency band.
11. Antenna according to Claim 9 or 10, characterized in that the operating sections (25b) lie on an operating plane (WE) which corresponds to the antenna element plane of the antenna elements (215) which emit in a lower frequency band.
12. Antenna according to one of Claims 1 to 11, characterized in that the operating section (25b) is aligned such that it is copolar to the respective antenna element (215) to be influenced.
13. Antenna according to one of Claims 1 to 12, characterized in that the antenna is a stationary mobile radio antenna.
14. Antenna according to one of Claims 1 to 13, characterized in that the mounting sections (25'a, 25" a) and/or the operating sections (25b, 25b', 25b") are arranged at the same distance from a vertical plane which runs centrally with respect to the reflector (1), and at right angles to the reflector plane.

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