Vehicle antenna module with arrangement of radiating elements

Abstract

To provide an antenna module for a vehicle, which does not affect aerodynamic characteristics of the vehicle.SOLUTION: An antenna module 100 for a vehicle includes: a base 1; a main board 2 disposed horizontally on the base 1; and first to fourth radiant elements 3-6 that protrude in an upper position from the main board 2. The first radiant element and the second radiant element have respective median axes that extend in a direction perpendicular to the horizontal plane of the base 1 and intersect the horizontal plane of the base 1 in respective intersection points disposed on both sides with respect to the longitudinal axis X of the base 1 and spaced from the longitudinal axis X of the base 1. The third radiant element and the fourth radiant element have respective median axes that extend in a direction perpendicular to the horizontal plane of the base 1 and intersect the horizontal plane of the base 1 in respective intersection points disposed on both sides with respect to the longitudinal axis of the base 1 and spaced from the longitudinal axis of the base 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an antenna module for vehicles with a specific arrangement of radiating elements to implement the various functions of the antenna in a reduced space and without affecting the aerodynamic properties of the vehicle. [Background technology]

[0002] In the automotive sector, antennas are generally arranged on the roof of the vehicle. In order to reduce air friction, antennas are known which are arranged in an aerodynamic box, the components of which are shaped like a shark fin.

[0003] However, in addition to the function of receiving radio waves of AM and FM frequencies, antennas are nowadays provided with additional functions, such as receiving signals for mobile phone communication and GPS signals, as well as digital radio. As a result, antenna modules require additional components, consisting of radiating elements, which cannot be contained in a shark-fin shaped box of standardized dimensions. Moreover, the radiating elements cause interference due to signal coupling if they are arranged too close to each other.

[0004] CN107181047 discloses a vehicle antenna with a first radiating element made of a double helix on a PCB and a second radiating element with a capacitive loading element. The second radiating element is triangular and arranged orthogonally to the first radiating element and has a cutout into which a third radiating element is inserted. The radiating elements are aligned with respect to the central longitudinal axis of the antenna. The intersections between the radiating elements and their alignment cause coupling of signals between the various radiating elements.

[0005] CN106099322 discloses an antenna with three radiating elements, composed of a first PCB for AM / FM, a second PCB for high frequency DAB, and a third PCB for low frequency DAB. The various PCB and antenna components are matched and arranged symmetrically with respect to the central longitudinal axis of the antenna. The geometric distribution of the various radiating elements arranged in a line along the longitudinal axis usually tends to favor one direction of radiation over the others, or in the worst case, to completely disable radiation in certain directions due to the shadowing resulting from nearby radiating elements.

[0006] Chinese Utility Model No. 204885432 discloses an antenna assembly with multiple independent radiating elements. All radiating elements are aligned with respect to the longitudinal axis of the antenna. Only one radiating element extends along the transverse axis of the antenna, which is in any case central and symmetrical with respect to the longitudinal axis of the antenna, which results in the aforementioned drawbacks.

[0007] EP 2 622 682 A1 discloses a multifunctional antenna composed of several radiating elements: two patch antennas for GNSS and SDARS functions, and two antennas for LTE and AM-FM functions obtained by PCBs arranged in a vertical position. The AM-FM antenna is realized in a distributed manner on three vertical PCBs, a central PCB arranged along the longitudinal axis and two end PCBs arranged in a transverse direction and engaged at the ends of the central PCB. The assembly of these three PCBs reconstructs, by the realization of conductor tracks on each PCB, a comprehensive antenna structure with a conductor grid arranged between the two end PCBs. The two end PCBs also perform an inductive load function for the antenna. Such an antenna is marred by several drawbacks, since the distributed AM / FM antenna is bulky and complex to manufacture. Furthermore, the radiating element with the vertical LTE PCB is perfectly parallel and very close to one of the end PCBs of the distributed AM-FM antenna, resulting in a low level of uncoupling between the LTE antenna and the AM-FM antenna.

[0008] WO2017076750 discloses an antenna unit comprising a main PCB arranged in a horizontal position, acting as a base, two LTE antennas made of the PCB, two Wi-Fi antennas made of monopole antennas, and two patch antennas. The base has a rectangular and non-elongated shape with a ratio of short side to long side of approximately 7 / 11. Due to the shape of the base, the antennas can be arranged at a sufficient distance to avoid interference. In fact, the two LTE antennas are arranged near the edge of the short side of the base and are symmetrical with respect to the center line axis. The two Wi-Fi antennas are arranged in an offset position near the edge of the long side of the base, and the two patch antennas are arranged in a central position of the base. A non-elongated parallelepiped cover is connected to the base to cover the antennas. When arranged on the roof of a vehicle, such a cover is obviously not aerodynamic.

[0009] US Patent Publication No. 018109006 discloses an antenna assembly comprising a main PCB arranged in a horizontal position and acting as a base, and a number of Wi-Fi, LTE and patch antennas. The base is circular in shape. In this case, to avoid interference between the antennas, the Wi-Fi and LTE antennas are arranged close to the circular edge of the base at peripheral positions, and the patch antennas are arranged at a central position of the base. A cover shaped like a segment of a sphere is coupled to the base to cover the antennas. Such a cover is obviously not as aerodynamic as an elongated cover.

[0010] US2013082890 discloses an array antenna with multiple radiating elements (notch antennas) that are equally spaced from each other and arranged according to the intersections of a grid that cooperate to act as an antenna. In such a case, a control unit must be provided to control the power of the radiating elements and establish the amplitude and phase of the signal transmitted to each radiating element. This type of application is for highly directional antennas and cannot be used for omnidirectional antennas such as vehicle antennas. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] China Patent Application Publication No. 107181047 [Patent Document 2] China Patent Publication No. 106099322 [Patent Document 3] China Utility Model No. 204885432 [Patent Document 4] European Patent Application Publication No. 2622682 [Patent Document 5] International Publication No. 2017076750 [Patent Document 6] US Patent Publication No. 018109006 [Patent Document 7] US Patent Publication No. 2013082890 Summary of the Invention [Problem to be solved by the invention]

[0012] The object of the present invention is to eliminate the drawbacks of the prior art by disclosing an antenna module for a vehicle, having an elongated aerodynamic shape, suitable for being arranged on the roof of a vehicle, and provided with a specific arrangement of the radiating elements in order to optimize the volume and at the same time ensure a proper uncoupling between the radiating elements.

[0013] Another object of the present invention is to disclose an antenna module for a vehicle having different functions and at the same time having an elongated aerodynamic shape with reduced dimensions, which is simple to realize and set up. [Means for solving the problem]

[0014] These objects are achieved according to the invention with the features of the independent claim 1.

[0015] Advantageous embodiments of the invention emerge from the dependent claims.

[0016] The vehicle antenna module according to the invention is defined in claim 1.

[0017] The antenna module according to the invention comprises at least four radiating elements, which are distributed in space substantially transversely, longitudinally and / or obliquely with respect to an axis of the antenna module running on a long side of the antenna module, the long side of the antenna module coinciding with the direction of movement of the vehicle, the radiating elements comprising a first pair of radiating elements offset on either side with respect to the longitudinal and transverse axes of the antenna module and a second pair of radiating elements offset on either side with respect to the longitudinal and transverse axes of the antenna module.

[0018] These radiating elements act as individual omnidirectional antennas.

[0019] In this way, the common influence of the radiating elements and the radiation diagram of the individual elements can be optimized. Indeed, by varying the misalignment of the radiating elements in the longitudinal and transverse axes of the antenna module, the distribution of maximum and minimum azimuthal angles of radiation can be optimized in order to obtain a radiation diagram that is as isotropic (omnidirectional) as possible for all radiating elements.

[0020] The invention provides for at least two radiating elements to be misaligned as much as possible in a controlled manner, i.e. offset with respect to the longitudinal and transverse axes of the antenna module, in order to minimize or in any case optimize the necessarily existing common interactions, and also when the various radiating elements are specialized for different functions and have different operating frequencies.

[0021] The antenna module of the present invention comprises multiple radiating elements and is typically used for voice and data connections, supporting multi-functionality of vehicular antennas, such as telephone functionality in versions with single or dual radiating elements, as well as implementation of other typical vehicular functions such as AM, FM, DAB, V2X, Wi-Fi, Bluetooth, etc.

[0022] In the antenna module of the present invention, the radiating elements generally do not have a double helix and do not cross or touch each other. Instead, the antenna module of the present invention has a single helix or non-helical shape. Furthermore, each type of radiating element, whether constructed from a single PCB or a single metal plate, is an independent radiating element, acts as an independent antenna and does not cooperate with other radiating elements. In other words, the radiating elements are not part of a distributed structure, such as an array with multiple radiating elements that cooperate to perform an antenna function. Advantageously, the volume and complexity are reduced for each function and the radiating elements can be precisely arranged to minimize coupling.

[0023] Further features of the invention will become more apparent from the following detailed description, with reference to illustrative and non-limiting embodiments thereof as shown in the accompanying drawings, in which: FIG. [Brief description of the drawings]

[0024] [Figure 1] 1 is a perspective view of an antenna module according to the present invention; [Diagram 2] FIG. 2 is a side view of the antenna module of FIG. [Diagram 3] FIG. 2 is a top view of the antenna module of FIG. [Figure 3A] 4 is a diagram showing the intersection of the central axis of the radiating element with the horizontal plane of the base and the projection of this intersection onto the longitudinal axis of the base. FIG. [Figure 4] FIG. 2 is a front view of the antenna module of FIG. [Diagram 5] FIG. 2 is the same view as in FIG. 1, but showing the radiating element constructed on a PCB with conductor tracks. [Figure 6] FIG. 5 is the same view as FIG. 4, showing the tracks on the PCB of the radiating element. [Figure 7] FIG. 13 is a perspective view of a second embodiment of an antenna module, in which the two radiating elements are conductor plates. [Figure 8] FIG. 8 is a side view of the antenna module of FIG. [Figure 9] FIG. 8 is a top view of the antenna module of FIG. [Figure 10] 2 is a perspective view of an example of a cover for an antenna module according to the present invention; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Referring to the drawings, an antenna module according to the present invention, generally designated by the reference numeral 100, is disclosed.

[0026] The antenna module (100) comprises a base (1) suitable for fixing to a part of the vehicle body, for example the roof.

[0027] In the following description, the terms "front" and "rear" refer to the direction of movement of the vehicle, regardless of the fact that the antennas may be mounted in opposite directions on the vehicle.

[0028] The base (1) is shaped like a rectangular or elongated plate, tapered in decreasing dimensions towards the front, with a rear end (10) and a front end (11). The base (1) has a longitudinal axis (X) and a transverse axis (Y) that intersect at the centre (O) of the base (Figure 3). The longitudinal and transverse axes of the base coincide with the central longitudinal and transverse lines of the base. The vertical axis (Z) of the base can be defined as perpendicular to the plane formed by the X and Y axes of the base and passing through the centre (O).

[0029] Referring to FIG. 3, the base (10) has a length (L) and a width (W) considered as the maximum width, the length (L) being greater than three times the width (W).

[0030] A shank (12) projects upwardly from the base (1) near the side edges of the base. The shank (12) is adapted to receive fastening means, such as a screw, for fastening a cover (200) (shown in FIG. 10) having an aerodynamic elongated shape, such as a shark fin. Such a cover (200) has a rear portion (201) having a maximum height and a tapered front portion (202) decreasing in height toward the front.

[0031] A raised support (13) projects upwardly from the base (1) and extends from the rear end (10) of the base to the front portion (11) of the base, which is provided with a trapezoidal shaped through slot (14).

[0032] The raised support (13) is shaped like a plate with a slightly higher thickness than the base (1). The raised support (13) has side edges with a curved portion (15) around the shank (12) to provide access to the shank (12). The raised support (13) can be made as one piece together with the base. Advantageously, the base (1) and the raised support (13) are made of zinc, aluminum, and magnesium alloy known by the trade name ZAMA (ZAMAC or ZAMAK).

[0033] The main board (2) is disposed on a raised support (13). The main board (2) can be realized on one PCB or can be divided into several PCBs disposed along a horizontal plane parallel to the base (1). The main board (2) has a substantially rectangular shape with a rear end (20), a front end (21), a right edge (22) and a left edge (22).

[0034] 3, the main board (2) has a length (L1) that is shorter than the length (L) of the base, and a width (W1) that is considered as the maximum width and is shorter than the width (W) of the base. In either case, the length (L1) of the main board (2) is greater than 2.5 times the width (W1) of the main board (2).

[0035] The main board (2) has a longitudinal axis (X1) and a transverse axis (Y1), which intersect at the center (O1) of the main board (Figure 3). The longitudinal and transverse axes of the main board coincide with the central longitudinal and transverse lines of the main board. Obviously, the center (O1) of the main board is disposed in a rear position with respect to the center (O) of the base.

[0036] The vertical axis (Z1) of the main board can be defined as being perpendicular to the main board and passing through the center (O1) of the main board.

[0037] The antenna module (100) comprises a first pair of radiating elements including a first radiating element (3) and a second radiating element (4), the first pair of radiating elements implementing the functions of two separate and independent antennas.

[0038] First and second radiating elements (3, 4) are mounted on the main board (2). Each radiating element (3, 4) has a longitudinal dimension, the dimension extending along a vertical axis (Z). The radiating elements (3, 4) are disposed in a substantially vertical position on the main board (2) and project upwardly therefrom along the longitudinal dimension of the radiating element.

[0039] Each radiating element (3, 4) may be a PCB or a suitably shaped conductor plate (FIGS. 7 to 9), in which case the radiating elements (3, 4) have a substantially flat shape.

[0040] FIG. 3 shows a configuration in which the first and second radiating elements (3, 4) are arranged transversely, ie with the planes of the radiating elements perpendicular to the longitudinal axis (X).

[0041] FIG. 7 shows a configuration in which a first radiating element (3) is disposed transversely and inclined with respect to the vertical axis (Z) of the base, and a second radiating element (4) is disposed perpendicular to the transverse direction with respect to the base (1).

[0042] The first and second radiating elements (3, 4) each have a central axis (a3, a4), which is a longitudinal axis passing through the centre of the radiating element and through the base (1).

[0043] Referring to FIG. 3A, the base (1) has a horizontal surface on which the longitudinal axis (X) of the base lies.

[0044] The central axes (a3, a4) of the first and second radiating elements intersect with the horizontal plane of the base at respective intersection points (P1, P2) shown in FIG. 3A.

[0045] According to the invention, the intersection points (P1, P2) are disposed on either side of the longitudinal axis (X) of the base and are spaced apart from the longitudinal axis (X) of the base by a distance (d1, d2).

[0046] Furthermore, the projection axes (J1, J2) pass through intersection points (P1, P2) in a direction perpendicular to the longitudinal axis (X) and intersect with the longitudinal axis (X) at different heights (Q1, Q2) of the longitudinal axis.

[0047] Thus, the first radiating element (3) and the second radiating element (4) are offset relative to the longitudinal axis (X) of the base, i.e. they are arranged asymmetrically relative to the longitudinal axis (X) of the base.

[0048] With reference to the drawing, the first radiating element (3) is closer to the left edge (22) of the main board and the second radiating element (4) is closer to the right edge (23) of the main board.

[0049] As mentioned before, the two radiating elements (3, 4) are offset by a distance (d1, d2) with respect to the longitudinal axis (X) of the base. By varying the distance (d1, d2), it is possible to vary the uncoupling between the two antennas formed by the radiating elements (3, 4) so ​​as to set the correct distance to maximize the uncoupling as well as the uniformity and isotropy of the radiation diagram.

[0050] It must be taken into account that, due to the volume of the cover (200), the maximum distance (d1, d2) of the first and second radiating elements from the longitudinal axis (X) may be approximately 1 / 3 to 1 / 4 of the width (W) of the base (1).

[0051] In the configuration shown in Figure 3, the first and second radiating elements (3, 4) are arranged transversely to the main board (2). The antenna module also comprises a second pair of radiating elements, including a third radiating element (5) and a fourth radiating element (6), which create two additional antennas that are physically separated and implement separate functions. The second pair of radiating elements is separate and distinct from the functions implemented by the first and second radiating elements (3, 4).

[0052] The third and fourth radiating elements (5, 6) are arranged vertically longitudinally on the main board (2), i.e. their surfaces are parallel to the longitudinal axis (X) of the base.

[0053] The third radiating element (5) and the fourth radiating element (6) are offset relative to the longitudinal axis (X) of the base. In other words, the third radiating element (5) and the fourth radiating element (6) are disposed in a parallel position and spaced apart from the longitudinal axis (X) of the base.

[0054] Furthermore, the third radiating element (5) and the fourth radiating element (6) are offset in position with respect to the longitudinal axis (X) of the base, i.e., are arranged asymmetrically with respect to the longitudinal axis (X) of the base.

[0055] The third and fourth radiating elements (5, 6) have central axes (a5, a6), respectively. The central axes (a5, a6) of the third and fourth radiating elements intersect with the horizontal plane of the base (1) at respective intersection points (P3, P4) shown in FIG. 3A.

[0056] Referring to FIG. 3A, the intersection points (P3, P4) of the central axes (a5, a6) of the third and fourth radiating elements are disposed on either side of the longitudinal axis (X) of the base and are spaced apart from the longitudinal axis (X) of the base by distances (d3, d4), respectively.

[0057] Furthermore, projection axes (J3, J4) perpendicular to the longitudinal axis (X) pass through the intersection points (P3, P4) and intersect with the longitudinal axis (X) at different heights (Q3, Q4) of the longitudinal axis.

[0058] Also in this case, it must be taken into account that the maximum distance (d3, d4) of the first and second radiating elements from the longitudinal axis (X) may be approximately 1 / 3 to 1 / 4 of the width (W) of the base (1).

[0059] By varying the distance (d3, d4) of the intersection points (P3, P4) of the central axes of the third and fourth radiating elements relative to the longitudinal axis (X) of the base, it is possible to vary the uncoupling between the two antennas formed by the third and fourth radiating elements to set the exact distance that maximizes the uncoupling and the uniformity and isotropy of the radiation diagram.

[0060] Furthermore, when the antenna module (100) comprises a first pair of offset radiating elements (comprised of the first and second radiating elements (3, 4)) and a second pair of offset radiating elements (comprised of the third and fourth radiating elements (5, 6)), it makes it possible to optimize the radiation diagram of the individual radiating elements by varying the offset of the individual radiating elements.

[0061] Furthermore, it is possible to optimize the radiation diagram of the radiating elements by varying the height (Q1, Q2, Q3, Q4) of each radiating element (3, 4, 5, 6) along the longitudinal axis (X). Since the cover (202) has a tapered front part (201), the height (Q1, Q2, Q3, Q4) of each radiating element (3, 4, 5, 6) along the longitudinal axis (X) does not allow the fourth radiating element (6) to be at the front end of the base (1). Meanwhile, the height (Q1) of the first radiating element (3) is near the rear end of the base, and the height (Q4) of the fourth radiating element (6) is near the center line (Y) of the base.

[0062] 1 to 3, the third radiating element (5) is closer to the right edge (23) of the main board, and the fourth radiating element (6) is closer to the left edge (22) of the main board.

[0063] Advantageously, the first radiating element (3) is close to the rear end (20) of the main board. The second radiating element (4) is arranged close to a transverse axis (Y1) coinciding with the center line of the main board. The third radiating element (5) is arranged between the first and second radiating elements (3, 4). The fourth radiating element (6) is arranged forward with respect to the second radiating element (4), leaving a space in front of the base (1).

[0064] Although FIG. 3 shows an antenna module with four vertically extending radiating elements (3, 4, 5, 6), the antenna module may comprise more than four vertically extending radiating elements.

[0065] Furthermore, at least one of the third and fourth radiating elements (5, 6) may be disposed in an oblique direction, i.e. the plane of the radiating element is oblique to the longitudinal axis (X) of the base.

[0066] 1 and 2, the third radiating element (5) is a PCB with a protruding top (50) at the rear, and does not interfere with the first radiating element (3) because the first radiating element (3) is closer to the right edge (22) of the main board, and the third radiating element (5) is closer to the left side (23) of the main PCB.

[0067] Similarly, the fourth radiating element (6) is a PCB with a protruding top (60) at the rear and does not interfere with the second radiating element (4) because the second radiating element (4) is closer to the left edge (23) of the main board and the fourth radiating element (6) is closer to the right side (23) of the main board.

[0068] It should be noted that the four radiating elements (3, 4, 5, 6) do not touch and do not cross.

[0069] The fourth radiating element (6) does not extend to the front of the main board (2). In fact, a square, circular or rectangular shaped integrated circuit (7) can be placed on the front of the main board (2), occupying a limited height space and implementing the fifth patch antenna.

[0070] For illustrative purposes, - The first radiating element (3) implements a first antenna for cellular communication (LTE or 5G). - The second radiating element (4) implements a second antenna for cellular communication (LTE or 5G). - The third radiating element (5) implements the AM / FM antenna. - The fourth radiating element (6) implements the DAB antenna. -The integrated circuit (7) implements a GNSS / GPS antenna.

[0071] The telephony antenna implemented by the first and second radiating elements (3, 4) may use the Long Term Evolution (LTE) standard used by fourth generation (4G) mobile phones, or another standard for fifth generation (5G) or beyond mobile phones.

[0072] The AM / FM antenna implemented by the third radiating element (5) is a radio antenna with amplitude / frequency modulation.

[0073] The DAB antenna implemented by the fourth radiating element (6) is a radio antenna using the DAB (Digital Audio Broadcasting) standard, which is a digital audio broadcasting standard that allows the audio transmission of radio programs in better quality.

[0074] The GNSS / GPS antenna implemented by the integrated circuit (7) is an antenna for receiving signals from the Global Navigation Satellite System (GNSS / GPS), a geopositioning and global navigation system using a network of orbiting satellites and pseudolites.

[0075] With reference to FIG. 5, the third and fourth radiating elements (3, 4) are PCBs containing respective inductances created by single spiral coils (55, 66) obtained by means of tracks on the PCB.

[0076] With reference to Figure 6, the first radiating element (3) contains two monopole antenna branches, one longer than the other and partially folded. These monopole antennas are necessary to achieve a frequency behavior suitable for covering the operation of the two band groups allocated to mobile phone communications. The longer monopole antenna covers the low frequency band and the shorter monopole antenna covers the high frequency band.

[0077] The second radiating element (4) consists of a PCB containing a monopole antenna and an inductance created by a single helical coil (45) obtained by means of tracks on the PCB.

[0078] With reference to figures 7 to 9, the first and second radiating elements (3, 4) consist of conductor tracks made of suitably shaped sheet metal. The conductor plate is C-shaped when viewed from the front and has folded edges (35).

[0079] In either case, the conductor plate of each radiating element has a substantially flat shape and extends almost perpendicularly to the base (1).

[0080] In particular, the first radiating element (3) has a central axis (3a) that is tilted backwards at an angle of approximately 10 to 40 degrees with respect to the vertical axis (Z) of the base.

[0081] The antenna module (100) of the present invention envisages an elongated and narrow base (1), with a ratio of length (L) to width (W) greater than 3. Furthermore, it must be taken into account that the width (W) of the base is generally less than 60 mm. This leads to a close proximity of the radiating elements (3, 4, 5, 6) which would cause interference if these elements were not arranged asymmetrically.

[0082] Moreover, it must be taken into account that the cover (200) has a tapered front part (202), so that the radiating elements (3, 4, 5, 6) with a certain height must be placed at the rear to avoid interference with the cover. Instead, the integrated circuit (7) implementing the patch antenna can be placed at the front.

Claims

1. A vehicle antenna module (100), A base (1) suitable for fixing to a portion of a vehicle body along a horizontal plane, the base having an elongated shape having a length (L) and a width (W), the length (L) being greater than three times the width (W), the base having a longitudinal axis (X) extending along a longitudinal centerline of the base, and a vertical axis (Z) extending perpendicular to the horizontal plane of the base; a main board (2) disposed horizontally on the base (1) and having a length (L1) less than the length (L) of the base and a width (W1) less than the width (W) of the base, the length (L1) of the main board (2) being greater than 2.5 times the width (W1) of the main board (2); a first pair of radiating elements including a first radiating element (3) and a second radiating element (4); a second pair of radiating elements including a third radiating element (5) and a fourth radiating element (6); Equipped with said radiating elements (3, 4, 5, 6) project from said main board (2) to an upward position along said vertical axis (Z), each radiating element implementing the function of an independent antenna without cooperating with other radiating elements; the radiating elements (3, 4, 5, 6) each have a central axis (a3, a4, a5, a6), the central axes (a3, a4, a5, a6) extending along the vertical axis (Z) and intersecting the horizontal plane of the base (1) at respective intersection points (P1, P2, P3, P4); the intersection points (P1, P2) of the central axes (a3, a4) of the first and second radiating elements (3, 4) are disposed on both sides of the longitudinal axis (X) of the base and are spaced apart from the longitudinal axis (X) of the base by distances (d1, d2); the intersection points (P3, P4) of the central axes (a5, a6) of the third and fourth radiating elements (3, 4, 5, 6) are disposed on both sides of the longitudinal axis (X) of the base and are spaced apart from the longitudinal axis (X) of the base by distances (d3, d4); The antenna module (100) has projection axes (J1, J2, J3, J4) perpendicular to the longitudinal axis (X), which pass through the intersection points (P1, P2, P3, P4) of the central axes (a3, a4, a5, a6) of the radiating elements (3, 4, 5, 6) and intersect with the longitudinal axis (X) at different heights (Q1, Q2, Q3, A4) of the longitudinal axis.

2. 2. An antenna module (100) according to claim 1, wherein said first and second radiating elements (3, 4) have a substantially planar shape and are arranged in a transverse direction, i.e. in a plane perpendicular to said longitudinal axis (X).

3. The antenna module (100) of claim 1, wherein the first radiating element (3) is disposed near a rear end (20) of the main board and the second radiating element (4) is disposed near a transverse axis (Y1) coinciding with a central axis of the main board.

4. The antenna module (100) of claim 3, wherein the first radiating element (3) is arranged in a backward inclined direction, i.e., the central axis (a3) ​​of the radiating element is backward inclined with respect to the vertical axis (Z) perpendicular to the horizontal plane of the base.

5. The antenna module (100) according to any one of claims 1 to 4, wherein the third and fourth radiating elements (5, 6) have a flat shape and are arranged longitudinally, i.e. parallel to the longitudinal axis (X) of the base.

6. The antenna module (100) according to any one of claims 1 to 4, wherein the third and fourth radiating elements (5, 6) have a flat shape and at least one of the third and fourth radiating elements (5, 6) is arranged in an oblique direction, i.e. obliquely with respect to the longitudinal axis (X) of the base.

7. 7. The antenna module (100) of claim 6, wherein the first radiating element (3) is disposed near a rear end (20) of the main board, the second radiating element (4) is disposed near a transverse axis (Y1) coinciding with a central axis of the main board, the third radiating element (5) is disposed between the first and second radiating elements (3, 4), and the fourth radiating element (6) is disposed in front of the second radiating element (4).

8. 8. The antenna module (100) of claim 7, wherein the third radiating element (5) is a PCB having a protruding top (50) at the rear and is not in contact with the first radiating element (3).

9. 9. The antenna module (100) according to claim 7 or 8, wherein the fourth radiating element (6) is a PCB having a protruding top (60) at the rear and is not in contact with the second radiating element (4).

10. Antenna module (100) according to any one of claims 6 to 9, wherein said radiating elements (3, 4, 5, 6) are non-touching and non-crossing.

11. The antenna module (100) according to any one of claims 1 to 10, further comprising an integrated circuit (7) having a GNSS / GPS antenna mounted thereon, the integrated circuit (7) being arranged horizontally at the front of the main board (2).

12. The antenna module (100) according to any one of claims 1 to 11, wherein the first radiating element (3) implements a first antenna for LTE or 5G telephony and the second radiating element (4) implements a second antenna for LTE or 5G telephony.

13. The antenna module (100) according to any one of claims 6 to 12, wherein the third radiating element (5) implements an AM / FM antenna and the fourth radiating element (6) implements a DAB antenna.

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