Antenna, mobile communication base station and user equipment

Abstract

An antenna (14, 16) has a reflector (20), a first radiator (18) having a radiator head (22) and a support (24), and a second radiator (19). The radiator head (22) comprises at least two radiating structures (26), and the support (24) is mounted to the reflector (20) and supports the radiator head (22). The balancer structure (30) includes a balancer ground plane (34) and a signal line (36). A shift structure (32) electrically connects the balancer structure (30) to the radiator head (22), the shift structure comprising a connection line (38) capacitively coupled to the balancer ground plane (34) and extending to the radiator head (22) and an inductance line (40) extending from the connection line (38) to the reflector ground plane and providing inductance. Furthermore, a mobile communication base station (10) and a user equipment (12) are shown.

Description

Technical Field

[0001] The present invention relates to an antenna, a mobile communication base station, and a user equipment. Background Art

[0002] Multi-band antennas are known in the art. In such an antenna, a first array of first radiators designed for a first frequency band is interleaved with a second array of second radiators designed for a second frequency band. It is desirable that the radiators in the arrays do not affect each other.

[0003] Generally, radiators designed as half-wavelength dipoles are used. However, the first natural resonance occurs at a quarter of the wavelength of the designed frequency (i.e., the average frequency of the corresponding frequency band). This means that the common-mode resonance of the mid-low band radiator designed for the frequency band between 1.4 GHz and 2.7 GHz is completely within the frequency range of the low band radiator designed for the frequency band of 700 to 960 MHz. Resonance can occur not only above the dipole but also includes the balun structure as a resonance element. The quarter-wavelength resonance generally requires a short-circuit end and an open-circuit end of the resonance line structure. These resonances are called common-mode resonances.

[0004] For example, according to US 9 698 486 B2 and US 2021 / 0328365 A1, balun structures that shift the common-mode resonance frequency to a frequency outside the low band are known.

[0005] However, the structures known in the art for shifting the common-mode resonance require a large amount of space on the support or on the reflector to which the support is mounted, or have a small bandwidth. Summary of the Invention

[0006] Therefore, an object of the present invention is to provide an antenna having a shifted common-mode resonance frequency, which has a small size, a large bandwidth, and is easy to manufacture.

[0007] For this purpose, in an embodiment, an antenna is provided, specifically, an antenna for a mobile communication base station. The antenna includes a reflector, a first radiator, and a second radiator. The first radiator has a radiator head and at least one support member. The radiator head includes at least two radiation structures, and the at least two radiation structures form at least one dipole. The reflector includes a reflector ground plane, and the support member is mounted to the reflector and supports the radiator head above the reflector. The second radiator is also mounted to the reflector. A balun structure and a shifting structure are at least partially provided on the support member. The balun structure includes a balun ground plane located at the support member and a signal line located at the support member. The shifting structure electrically connects the balun structure to the radiator head. The shifting structure includes a connection line and an inductive line. The connection line is capacitively coupled to the balun ground plane at the support member and extends to the radiator head, and the inductive line extends from the connection line to the reflector ground plane and provides inductance.

[0008] By providing a shifting structure having an additional inductive line (the additional inductive line having inductance), the shift of the common-mode frequency can be flexibly adjusted, resulting in a wide bandwidth while achieving a compact and easily manufacturable design.

[0009] The first radiator is configured to transmit and receive electromagnetic radiation in a first frequency band. For example, the first frequency band is higher than 1.0 GHz. Specifically, the first frequency band is 1.4 GHz to 2.7 GHz.

[0010] The second radiator is configured to transmit and receive electromagnetic radiation in a second frequency band different from the first frequency band. For example, the second frequency band is lower than 1.0 GHz. Specifically, the second frequency band can be 617 MHz to 960 MHz.

[0011] For example, the inductive line has a characteristic impedance higher than the impedance of the grounded balun structure. The impedance of the inductive line is, for example, greater than 75 ohms.

[0012] The balun structure is specifically configured to balance the signal to the at least one dipole. For example, the balun structure forms a Marchand balun.

[0013] The shifting structure is specifically configured to shift the common-mode resonance.

[0014] For example, the first end of the inductive line is galvanically coupled to the connection line, and its second end is galvanically coupled to the reflector ground plane.

[0015] In an embodiment, the balun ground plane includes two separate balun ground portions, and the shifting structure includes two connection lines and two inductive lines, wherein each radiating structure is associated with one of the connection lines, one of the inductive lines, and one of the ground portions. Specifically, each radiating structure is electrically coupled to an associated connection line, and the associated connection line is electrically coupled to an associated inductive line and an associated balun ground portion, thereby providing a symmetric shifting structure that further improves signal quality.

[0016] The signal line can be capacitively coupled to the two balun ground portions.

[0017] To further improve signal quality, the connection line can include a chip portion that is capacitively coupled to the balun ground plane, specifically, to an associated balun ground portion.

[0018] The chip portion can have a rectangular shape, and the side lengths thereof differ from each other by within ±30%.

[0019] In an embodiment, the inductive line is coupled to the connection line by current, specifically, to the chip portion, thereby providing a reliable coupling.

[0020] The inductive line is specifically coupled to the associated connection line by current.

[0021] On the one hand, the inductive line includes an inductive portion. Specifically, the inductive line includes parallel traces that form the inductive portion. In this way, by changing the length and number of the parallel traces, the inductance provided by the inductive portion can be easily adjusted.

[0022] For example, the parallel traces are part of a meandering shape.

[0023] In an embodiment, the inductive line includes a coupling portion that is capacitively coupled to the balun ground plane, specifically, to an associated balun ground portion. By providing a capacitive coupling between the inductive line and the balun ground plane, a large shift in the common-mode frequency can be achieved in a simple structural manner.

[0024] For example, the coupling portion includes a trace that extends parallel to the edge of the balun ground plane. Specifically, the distance between the trace and the edge is less than 1.5 mm and / or less than 1 / 100 of the wavelength of the average frequency of the frequency band of the radiating structure, thereby achieving a reliable capacitive coupling.

[0025] Specifically, the frequency band of the radiating structure is the first frequency band.

[0026] Specifically, other portions of the inductive line are spaced further apart from the balun ground plane.

[0027] To further simplify the design or reduce the space required on the support, the transducer structure can be located entirely on the support, or partially on the support and partially on the reflector; and / or, the shift structure can be located entirely on the support, or partially on the support and partially on the radiator head. Specifically, the inductive line is located entirely on the support.

[0028] In an embodiment, the support includes a carrier, which is a dielectric, specifically a foil or a printed circuit board. The carrier has two surfaces, and the transducer structure and the shift structure are applied to the surfaces of the carrier, specifically as metallization layers. In this way, a reliable and cost-effective method for manufacturing the support is provided.

[0029] The carrier can be multi-layered.

[0030] To further improve the signal characteristics, the two surfaces can be a ground surface and a signal surface. The transducer ground plane can be disposed on the ground surface, the connection lines of the shift structure can be disposed on the signal surface, and / or the inductive lines of the shift structure can be disposed on the ground surface or the signal surface.

[0031] Specifically, the ground surface and the signal surface are opposite surfaces, for example, the surfaces of the same material layer of the carrier.

[0032] For example, the transducer ground plane is at least partially located on the ground surface, and / or the signal line is at least partially located on the signal surface.

[0033] The transducer ground plane can be located between the two inductive lines, specifically, between the capacitively coupled portions of the inductive lines.

[0034] To achieve a reliable connection, if the inductive line and the connection line are on different sides of the carrier, the inductive line can be electrically coupled to the connection line by a via passing through the carrier.

[0035] On the one hand, the connection line (specifically, the chip portion) and the transducer ground plane overlap in the projection perpendicular to the carrier, thereby providing a well-defined capacitive coupling.

[0036] In an embodiment, the radiator includes two supports and four radiation structures on the radiator head. The four radiation structures form two dipoles, and each support is associated with one of the dipoles. Specifically, the supports are arranged perpendicular to each other. In this way, a dual-polarized radiator is provided.

[0037] For example, each dipole is electrically connected to the transducer structure and the shift structure of the associated support.

[0038] On the one hand, the antenna includes a plurality of first radiators forming a first array and / or a plurality of second radiators forming a second array, thereby providing a multi-band array antenna.

[0039] For the above purpose, in an embodiment, a mobile communication base station is further provided, which has at least one antenna as described above.

[0040] In addition, for the above purpose, in an embodiment, a user equipment for mobile communication having at least one antenna as described above is provided.

[0041] The features and advantages described with respect to the antenna also apply to the base station and / or the user equipment, and vice versa. Description of the Drawings

[0042] Further features and advantages will be apparent from the following description and the accompanying drawings. In the drawings:

[0043] Figure 1 A mobile communication base station according to an embodiment of the present invention is shown, which has an antenna according to an embodiment of the present invention and a user equipment according to an embodiment of the present invention, and the user equipment has an antenna according to an embodiment of the present invention.

[0044] Figure 2 Shows according to Figure 1 An enlarged view of one second radiator and four first radiators of the antenna.

[0045] Figure 3 Shows Figure 2 An enlarged view of one of the first radiators.

[0046] Figure 4 And Figure 5 Respectively show Figure 3 A front view and a rear view of the support (without a carrier) of the radiator.

[0047] Figure 6 Is shown in a schematic front view Figure 3 The equivalent circuit of the radiator, and

[0048] Figure 7 Shows a front view of the support of the radiator of the antenna according to a second embodiment of the present invention. Detailed Description of the Invention

[0049] Figure 1 An embodiment of a mobile communication base station 10 and an embodiment of a user equipment 12 are shown.

[0050] The mobile communication base station 10 has a plurality of antennas 14 for providing voice and data connections to user equipment. The mobile communication base station 10 is also referred to as a mobile communication cell site.

[0051] The mobile communication base station 10 can be an access network node of the radio access network of a telecommunication network, or any other similar 3rd Generation Partnership Project (3GPP) access node or non-3GPP access point.

[0052] Furthermore, those skilled in the art will understand that the access network node is not necessarily limited to an implementation provided by a single vendor and integrating a radio part and a baseband part. Thus, it will be understood that the network node includes a decomposed implementation or parts thereof.

[0053] For example, in some embodiments, the mobile communication base station 10 is an Open RAN (ORAN) network node. An ORAN network node is a node in a telecommunication network that supports ORAN specifications (e.g., specifications published by the O-RAN Alliance or any similar organization), and can operate independently or together with other nodes to implement one or more functions of any node in the telecommunication network, including one or more network nodes and / or core network nodes.

[0054] Examples of ORAN network nodes include an Open Radio Unit (O-RU), an Open Distributed Unit (O-DU), and an Open Central Unit (O-CU).

[0055] The antenna 14 of the mobile communication base station 10 is a multi-band antenna for providing voice and data connections in various frequency bands.

[0056] The user equipment 12 has an antenna 16 and can be a mobile phone, a laptop computer, etc. The antenna 16 of the user equipment 12 is also a multi-band antenna, which allows voice and / or data connections to the mobile communication base station 10 and / or a communication satellite.

[0057] As Figure 2 shown, Figure 2 exemplarily depicted is a radiator of the mobile communication base station 10, where the two antennas 14 and 16 have a plurality of first electromagnetic radiators 18 and a plurality of second radiators 19, although Figure 2 only one second radiator 19 is shown in

[0058] The first radiator 18 (referred to as the first radiator 18 only for distinction) forms a first array designed for a first frequency band. Thus, the first radiator 18 is designed to transmit and receive electromagnetic waves in the first frequency band.

[0059] Similarly, the second radiator 19 forms a second array for a second frequency band. Thus, the second radiator 19 is designed to transmit and receive electromagnetic waves in the second frequency band.

[0060] The first radiator 18 (specifically, the first array) and the second radiator (specifically, the second array) are interleaved with each other.

[0061] The first frequency band is above the second frequency band, specifically, completely above the second frequency band, i.e., not overlapping with the second frequency band.

[0062] For example, the first frequency band is higher than 1.0 GHz, specifically, the first frequency band is from 1.4 GHz to 2.7 GHz.

[0063] For example, the second frequency band is lower than 1.0 GHz, specifically, the second frequency band can be from 617 MHz to 960 MHz.

[0064] The first radiator 18 and the second radiator 19 are mounted on a reflector 20, and the reflector 20 serves as a common reflector for the two types of radiators 18, 19.

[0065] Figure 3 One of the first radiators 18 mounted to the reflector 20 is shown.

[0066] Directional terms such as "up", "down", "above", "vertical", etc. should be understood with respect to the radiation direction R of the radiator. "Lateral" or "horizontal" should be understood as the direction perpendicular to the radiation direction R.

[0067] The radiator 18 includes a radiator head 22 and two supports 24.

[0068] The radiator head 22 has four radiation structures 26, each forming a dipole arm. The radiation structures 26 are arranged in a 2x2 grid, where the diagonally opposite radiation structures 26 form a dipole.

[0069] For example, the radiator head 22 is a dual-polarized dipole, specifically, having a +45-degree single-polarized dipole and a -45-degree single-polarized dipole. Each single-polarized dipole includes two dipole arms. The radiation structure 26 can also be formed as a flat metal area, thus also forming a loop or including an opening.

[0070] The radiator head 22 is mounted above the reflector 20 through the support 24.

[0071] Each support 24 includes a mechanical carrier 28 for mechanically supporting the radiator head 22, as well as a balun structure 30 and a displacement structure 32. For simplicity, Figure 3 the balun structure 30 and the displacement structure 32 are not shown in the figure.

[0072] The carriers 28 of the supports 24 all extend perpendicular to the reflector 20. The carriers 28 are arranged perpendicular to each other and / or cross each other.

[0073] The carrier 28 can be a substrate of a dielectric material. For example, the substrate is a printed circuit board.

[0074] It is also conceivable that the carrier 28 is one or more foils carrying the balancer structure 30 and the displacement structure 32.

[0075] In the illustrated embodiment, the carrier 28 has two surfaces, namely a signal surface S and a ground surface G.

[0076] It is conceivable that the carrier 28 is multilayered, such as a multilayer substrate. In this case, the carrier 28 includes more than two surfaces. In a multilayer substrate, the inner surfaces can be referred to as layers.

[0077] The balancer structure 30 and the displacement structure 32 can be metallization layers deposited on the respective surfaces of the carrier 28 using deposition techniques known in the art.

[0078] In the same manner, the radiator head 22 includes a carrier 28, on the surface of which the radiation structure 26 is applied.

[0079] Figure 4 and Figure 5 Front views (i.e., onto the signal surface S) and rear views (i.e., onto the ground surface G) of one of the supports 24 are shown respectively. In both figures, the carrier 28 is not shown, so that the metallization layers on the two surfaces S and G can be seen.

[0080] Specifically, the balancer structure 30 and the displacement structure 32 of the support 24 are the same, so that only one support 24 will be discussed hereinafter.

[0081] The balancer structure 30 and the displacement structure 32 are electrically connected to the radiation structure 26 of one of the dipoles.

[0082] The balancer structure 30 includes a balancer ground plane 34 and a signal line 36.

[0083] The balancer structure 30 forms a Marchand balancer known in the art.

[0084] The balancer ground plane 34 and the signal line 36 are arranged on opposite sides of the carrier 28. For example, the signal line 36 is located on the signal surface S, and the balancer ground plane 34 is located on the ground surface G.

[0085] The balancer ground plane 34 includes two balancer ground portions 37 arranged side by side, each balancer ground portion being associated with a different radiation structure in the radiation structure 26 of the corresponding dipole.

[0086] The balancer ground portions 37 are separated by a vertical gap therebetween, and each ground portion 37 extends upward from the lower end of the support 24.

[0087] As Figure 5 best shown, each of the load cell ground portions 37 includes an outer edge 50, i.e., the edge of another load cell ground portion 37 that faces away from the same load cell ground plane 34.

[0088] In the assembled state, the two load cell ground portions 37 are electrically connected to the reflector 20, more precisely, to the reflector ground plane of the reflector 20 in a current-coupled or capacitance-coupled manner.

[0089] The signal line 36 extends upward from the lower end of the support 24 in the region of one of the load cell ground portions 37 and then partially crosses the gap laterally into the region of the other load cell ground portion 37. There, the signal line 36 ends in the sheet.

[0090] It is also conceivable to arrange part of the load cell ground plane 34 (i.e., part of the load cell ground portion 37) and / or part of the signal line 36 on the reflector 20.

[0091] The displacement structure 32 includes two connection lines 38 and two inductive lines 40.

[0092] Each radiation structure 26 of the corresponding dipole is associated with one of the connection lines 38, one of the inductive lines 40, and one of the load cell ground portions 37. Thus, the associated load cell ground portion 37, the associated connection line 38, and the associated inductive line 40 are electrically connected to each other and to the corresponding radiation structure 26.

[0093] Specifically, the connection lines 38 and the inductive lines 40 are identical but mirror images of each other. In the following, only one set of radiation structures 26 and the associated connection lines 38, inductive lines 40, and load cell ground portions 37 will be mentioned.

[0094] The connection line 38 is located on the signal surface S and extends upward from the load cell structure 30 to the radiator head 22. It electrically connects the load cell structure 30 to the radiation structure 26 of the associated dipole.

[0095] Part of the connection line 38 can be located on the radiator head 22. In this case, the displacement structure 32 is partially located on the support and partially located on the radiator head 22. However, in the illustrated embodiment, the displacement structure 32 is entirely located on the support 24.

[0096] The connection line 38 includes a sheet portion 42 that forms the lower end of the connection line 38.

[0097] The sheet portion 42 has a rectangular shape, specifically, a square shape. For example, the side lengths of the rectangular shape differ from each other by no more than 30%.

[0098] Upward from the chip portion 42, the remaining connection lines 38 extend in a linear manner, where the width of the line is wider than the width of the signal line 36 of the transducer structure 30.

[0099] The chip portion 42 is at least partially located in the region of the transducer ground portion 37. Thus, from Figure 4 and Figure 5 it can be seen that the chip portion 42 and the associated transducer ground portion 37 overlap each other in a projection perpendicular to the carrier 28.

[0100] Thus, the chip portion 42 is capacitively coupled to the associated transducer ground portion 37.

[0101] In addition, at least a part (specifically, the laterally extending part) of the signal line 36 of the transducer structure 30 is located between the chip portions 42.

[0102] In the illustrated embodiment, the inductive line 40 is located at the ground surface G, that is, on the surface opposite to the associated connection line 38.

[0103] The inductive line 40 extends from the associated connection line 38 at the first end in a single trace.

[0104] Starting from the first end, the inductive line 40 has an inductive portion 46, then has a coupling portion 48, and after that, at its second end, the inductive line is electrically connected to the reflector ground plane of the reflector 20.

[0105] The second end is, for example, at the same height as the transducer ground portion 37 in the radiation direction R.

[0106] The first end of the inductive line 40 is located in the region of the chip portion 42. At the position of the first end, the via 44 extends through the carrier 28 and electrically couples the first end to the chip portion 42, that is, the connection line 38.

[0107] In the inductive portion 46, the trace of the inductive line 40 extends in a meandering manner. Thus, there are several parallel traces of the inductive line 40 in the inductive portion 46.

[0108] Due to the parallel traces, the inductive portion 46 provides inductance.

[0109] The inductive line 40 extends downward from the inductive portion 46 to the reflector 20.

[0110] The coupling portion 48 is in the last part before reaching the reflector 20. In the coupling portion 48, the inductive line 40 extends close to the associated transducer ground portion 37.

[0111] The traces of the inductive line 40 extend parallel to and close to the outer edge 50 of the balance transducer ground portion 37, where the distance between the inductive line 40 and the edge 50 is less than 1.5 millimeters and / or less than 1 / 100 of the wavelength of the average frequency of the first frequency band.

[0112] Other portions of the inductive line 40 are spaced further apart from the balance transducer ground portion 37.

[0113] Thus, in the coupling portion 48, the balance transducer ground plane 34 is capacitively coupled to the associated balance transducer ground portion 37.

[0114] The inductive line 40 (specifically, the coupling portion 48) is arranged on the opposite side of the balance transducer ground plane 34 of the same support 24.

[0115] Thus, the balance transducer ground plane 34 and the two balance transducer ground portions 37 are located between the coupling portions 48 of the inductive line 40.

[0116] During operation, a signal is fed to the signal line 36. This signal is balanced by the balance transducer structure 30 and fed to the radiation structure 26 through the shift structure 32 to generate a corresponding electromagnetic wave.

[0117] The balance transducer structure 30 provides the necessary balance to convert the unbalanced signal of the signal line 36 into the balanced signal required by the radiation structure 26.

[0118] In addition, the shift structure 32 shifts the common-mode resonance of the first radiator 18 to a frequency outside the second frequency band. In other words, the first natural resonance (i.e., the resonance without the shift structure) occurring at a quarter of the wavelength of the average frequency of the first frequency band is shifted out of the second frequency band, thereby improving the signal quality.

[0119] Figure 6 A schematic circuit diagram representing the radiator 18 (i.e., one dipole of the first radiator 18 and a support 24) is shown. Inductance is marked with the letter "L", capacitance is marked with the letter "C", and the connection to the reflector ground plane of the reflector 20 is marked with the letter "GND".

[0120] From Figure 6 It can be seen that the balance transducer structure 30 is connected to the radiation structure 26 through the connection line 38, and the connection line 38 mainly provides capacitance.

[0121] At the same time, the inductive line 40 provides an inductive coupling between the connection line 38 and the reflector ground plane. In addition, the inductive line 40 also provides capacitance to the balance transducer structure 30.

[0122] The shift structure 32 has a symmetric bandwidth and provides a high degree of freedom for the adjustment and shifting of the common-mode resonance. In addition, the shift structure 32 is still compact and easy to manufacture.

[0123] Figure 7 shows a view of the support member 24, which is similar to Figure 4 the view of, however, the antennas 14 and 16 belonging to the second embodiment of the present invention. The second embodiment of the present invention substantially corresponds to the first embodiment, and thus only the differences will be discussed hereinafter. The same components and components identical in function are labeled with the same reference numerals.

[0124] In the second embodiment, the inductive line 40 is not located at the ground surface G, but at the signal surface S.

[0125] The first end of the inductive line 40 extends directly from the tab portion 42 of the connection line 38.

[0126] As discussed with respect to the first embodiment, the coupling portion 48 may extend a short distance from the outer edge 50, but on another surface different from the outer edge 50.

[0127] It is also conceivable that the coupling portion 48 extends in the region of the associated transducer ground portion 37, i.e., overlaps the transducer ground portion 37 in a projection perpendicular to the carrier 28.

[0128] In the second embodiment, the capacitive coupling between the inductive line 40 in the coupling portion 48 and the corresponding transducer ground portion 37 is embodied by the material of the carrier 28.

[0129] In this design, since no vias are required, the manufacture of the support member 24 is further simplified.

Claims

1. An antenna, specifically for a mobile communication base station (10), the antenna comprising a reflector (20), a first radiator (18) and a second radiator (19), the first radiator (18) having a radiator head (22) and at least one support (24). Wherein, The radiator head (22) includes at least two radiating structures (26), the at least two radiating structures (26) form at least one dipole, the reflector (20) includes a reflector ground plane, and the support (24) is mounted to the reflector (20) and supports the radiator head (22) above the reflector (20). Wherein, the second radiator (19) is mounted to the reflector (20). Wherein, the balun structure (30) and the shifting structure (32) are at least partially disposed on the support (24). Wherein, the balun structure (30) includes a balun ground plane (34) located at the support (24) and a signal line (36) located at the support (24), and Wherein, the shifting structure (32) electrically connects the balun structure (30) to the radiator head (22), the shifting structure includes a connection line (38) and an inductive line (40), wherein, the connection line (38) is capacitively coupled to the balun ground plane (34) and extends to the radiator head (22), and the inductive line (40) extends from the connection line (38) to the reflector ground plane and provides inductance.

2. The antenna according to claim 1, characterized in that, The balun ground plane (34) includes two separate balun ground portions (37), and the shifting structure (32) includes two connection lines (38) and two inductive lines (40), wherein, each radiating structure (26) is associated with one of the connection lines (38), one of the inductive lines (40), and one of the balun ground portions (37), specifically, wherein, each radiating structure (26) is electrically coupled to the associated connection line (38), and the associated connection line (38) is electrically coupled to the associated inductive line (40) and the associated balun ground portion (37).

3. The antenna according to claim 2, characterized in that, The signal line (36) is capacitively coupled to the two balun ground portions (37).

4. The antenna according to any one of the preceding claims, characterized in that, The connection line (38) includes a tab portion (42), and the tab portion (42) is capacitively coupled to the balun ground plane (34), specifically coupled to the associated balun ground portion (37).

5. The antenna according to any one of the preceding claims, characterized in that, The inductive line (40) is current-coupled to the connection line (38), specifically coupled to the tab portion (42).

6. The antenna according to any one of the preceding claims, characterized in that, The inductive line (40) includes an inductive portion (46), specifically, wherein, the inductive line (40) includes parallel traces forming the inductive portion (46).

7. The antenna according to any one of the preceding claims, characterized in that, The inductive line (40) includes a coupling portion (48), and the coupling portion (48) is capacitively coupled to the balun ground plane (34), specifically coupled to the associated balun ground portion (37).

8. The antenna according to claim 7, characterized in that, The coupling portion (48) includes a trace, and the trace extends parallel to the edge (50) of the balun ground plane (34), specifically, wherein, the distance between the trace and the edge (50) is less than 1.5 mm and / or less than 1 / 100 of the wavelength of the average frequency of the frequency band of the radiating structure (26).

9. The antenna according to any one of the preceding claims, characterized in that, The weighing transducer structure (30) is located entirely on the support (24), or is partially located on the support (24) and partially on the reflector (20); and / or the displacement structure (32) is located entirely on the support (24), or is partially located on the support (24) and partially on the radiator head (22). Specifically, the inductive line (40) is located entirely on the support (24).

10. The antenna according to any one of the preceding claims, characterized in that, The support (24) includes a carrier (28) which is a dielectric, specifically a foil or a printed circuit board. The carrier (28) has two surfaces (S, G), and the weighing transducer structure (30) and the displacement structure (32) are applied to the surfaces (S, G) of the carrier (28), specifically as metallization layers.

11. The antenna according to claim 10, characterized in that, The two surfaces (S, G) are a ground surface (G) and a signal surface (S). The weighing transducer ground plane (34) is provided on the ground surface (G), the connection line (38) of the displacement structure (32) is provided on the signal surface (S), and / or the inductive line (40) of the displacement structure (32) is provided on the ground surface (G) or the signal surface (S).

12. The antenna according to claim 10 or 11, characterized in that, The inductive line (40) is conductively coupled to the connection line (38) by a via (44) extending through the carrier (28).

13. The antenna according to any one of claims 10 to 12, characterized in that, The connection line (38) and the weighing transducer ground plane (34) overlap in a projection perpendicular to the carrier (28), and the connection line (38) is specifically the sheet portion (42).

14. The antenna according to any one of the preceding claims, characterized in that, The radiator (18) includes two supports (24) and four radiation structures (26) on the radiator head (22). The four radiation structures (26) form two dipoles, and each support (24) is associated with one of the dipoles. Specifically, the supports (24) are arranged perpendicular to each other.

15. The antenna according to any one of the preceding claims, characterized in that, The antennas (14, 16) include a plurality of first radiators (18) forming a first array and / or a plurality of second radiators (19) forming a second array.

16. A mobile communication base station having at least one antenna (14, 16) according to any one of claims 1 to 15.

17. A user equipment for mobile communication, having at least one antenna (14, 16) according to any one of claims 1 to 15.

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