Vehicle antenna module with radiating element arrangement

Abstract

An antenna module (100) for a vehicle, comprising: a base (1) suitable for being fixed to a portion of the vehicle body; a main plate (2) horizontally arranged on the base (1); first, second, third and fourth radiating elements (3, 4, 5, 6) projecting upwards from the main plate (2); the first and second radiating elements (3, 4) have respective central axes (a3, a4) extending in the direction of the vertical axis (Z) and intersecting the horizontal plane of the base (1) at respective points of intersection (P1, P2) arranged on either side of the longitudinal axis (X) of the base and spaced apart from the longitudinal axis (X) of the base by a distance (d1, d2); the third and fourth radiating elements (5, 6) have respective central axes (a5, a6) extending in the direction of the vertical axis (Z) and intersecting the horizontal plane of the base (1) at respective points of intersection (P3, P4) arranged on either side of the longitudinal axis (X) of the base and spaced apart from the longitudinal axis (X) of the base by a distance (d3, d4).

Description

Technical Field

[0001] The present invention relates to an antenna module for a vehicle with a specific arrangement of radiating elements, which realizes different antenna functions in a reduced space and without affecting the aerodynamic characteristics of the vehicle. Background Technology

[0002] In the automotive industry, antennas are typically mounted on the roof of a vehicle. Antennas are known to consist of components housed within an aerodynamically shaped enclosure, resembling a shark fin, to reduce air friction.

[0003] However, in addition to functioning as a radio receiver for AM and FM frequencies, antennas have recently taken on other functions, such as signal transceivers for mobile phones and GPS signals, as well as digital radio. Therefore, antenna modules require the addition of components consisting of radiating elements, which cannot be housed in a shark fin-shaped box with standardized dimensions. Furthermore, if they are placed too close together, the radiating elements can cause interference due to signal coupling.

[0004] CN107181047 discloses a vehicle antenna comprising: a first radiating element having a double helix on a PCB and a second radiating element having a capacitive load element. The second radiating element has a triangular shape, is configured to be orthogonal to the first radiating element, and has a cutout in which a third radiating element is inserted. The radiating elements are aligned relative to the central longitudinal axis of the antenna. The intersection and alignment between the radiating elements result in signal coupling between the various radiating elements.

[0005] CN106099322A discloses an antenna comprising three radiating elements, each consisting of a first PCB for AM / FM, a second PCB for high-frequency DAB, and a third PCB for low-frequency DAB. The various PCBs and components of the antenna are aligned and symmetrically arranged relative to the antenna's central longitudinal axis. The geometric distribution of the various radiating elements arranged in a line along the longitudinal axis generally tends to prioritize one radiation direction over others, or, in the worst case, to produce true zero radiation in some directions due to the shielding effect of the radiating elements derived from the near-end.

[0006] CN204885432 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, and in any case, it is centered and symmetrical with respect to the longitudinal axis of the antenna, thus leading to the aforementioned disadvantages.

[0007] EP2622682A1 discloses a multifunctional antenna consisting of multiple radiating elements: two patch antennas for GNSS and SDARS functions, and two antennas for LTE and AM-FM functions, obtained via a vertically positioned PCB. The AM-FM antenna is implemented in a distributed manner on three vertical PCBs: a central PCB arranged along the longitudinal axis, and two laterally arranged end PCBs joined at the ends of the central PCB. The assembly of the three PCBs recreates a comprehensive antenna structure by implementing conductive traces on each PCB and a conductor grid between the end PCBs. The end PCBs also perform an inductive load function for the antenna. This antenna suffers from several drawbacks due to its large size and complex manufacturing process. Furthermore, the radiating elements with the vertical LTE PCBs are completely parallel and very close to one of the end PCBs of the distributed AM-FM antenna, resulting in a low level of decoupling between the LTE and AM-FM antennas.

[0008] WO2017076750 discloses an antenna element comprising: a horizontally placed main PCB serving as a base; two LTE antennas, each including a PCB; and two Wi-Fi antennas, each consisting of a monopole antenna and two patch antennas. The base is a rectangular, non-elongated shape with a short-side to long-side ratio of approximately 7 / 11. Due to the shape of the base, the antennas can be positioned at sufficient distances to avoid interference. In practice, the two LTE antennas are positioned near the edges of the short sides of the base and are symmetrical about the centerline. The two Wi-Fi antennas are located near the edges of the main sides of the base at offset positions; the two patch antennas are positioned at the center of the base. A non-elongated parallelepiped cover is coupled to the base to cover the antennas. Clearly, such a cover would be aerodynamically inefficient when mounted on the roof of a vehicle.

[0009] US018109006A1 discloses an antenna assembly comprising: a horizontally placed main PCB serving as a base; and multiple Wi-Fi, LTE, and patch antennas. The base has a circular shape. In this configuration, to avoid interference between the antennas, the Wi-Fi and LTE antennas are positioned peripherally near the circular edge of the base, and the patch antennas are positioned centrally on the base. A cover, shaped like a portion of a sphere, is coupled to the base to cover the antennas. Clearly, such a cover is less aerodynamically efficient than an elongated cover.

[0010] US2013082890A1 discloses an array antenna comprising a plurality of radiating elements (notch antennas) arranged according to the intersections of a grid, the radiating elements being equidistant from each other and cooperating to function as an antenna. In this case, a control unit must be provided to control the power of the radiating elements and determine the amplitude and phase of the signal to be sent to each radiating element. This type of application is used for highly directional antennas and cannot be used for omnidirectional antennas, such as vehicle antennas. Summary of the Invention

[0011] The purpose of this invention is to overcome the shortcomings of the prior art by disclosing an antenna module for vehicles with an elongated aerodynamic shape, which is suitable for placement on the roof of a vehicle and has a specific arrangement of radiating elements to optimize volume while ensuring proper decoupling between the radiating elements.

[0012] Another object of the present invention is to disclose an antenna module for a vehicle that has different functions, while having an elongated aerodynamic shape, a reduced size, and is easy to implement and install.

[0013] The antenna module according to the invention includes at least four radiating elements distributed in space in substantially transverse and longitudinal and / or oblique directions relative to the axis of the antenna module extending over its main dimensions, consistent with the vehicle's direction of travel. The radiating elements include a first pair offset to both sides relative to the longitudinal and transverse axes of the antenna module, and a second pair offset to both sides relative to the longitudinal and transverse axes of the antenna module.

[0014] The radiating element is used as a separate omnidirectional antenna.

[0015] In this way, the interaction between radiating elements and the radiation pattern of individual elements can be optimized. In fact, by changing the misalignment of the radiating modules on the vertical and horizontal axes of the antenna module, the azimuth distribution of the maximum and minimum radiation values ​​can be optimized, thus obtaining the following radiation pattern: for each radiating element, it should be as isotropic (omnidirectional) as possible.

[0016] The present invention provides a way to make radiating elements as misaligned as possible in a controllable manner, i.e., at least two radiating elements misaligned with the longitudinal and transverse axes of the antenna module, in order to minimize or optimize, in any case, the inevitable mutual interference that may occur (also when various radiating elements are dedicated to different functions and have different operating frequencies).

[0017] The antenna module of the present invention includes multiple radiating elements that support various functions of a vehicle antenna, such as telephone functions, which are typically used for voice and / or data connections, and has single or dual radiating elements, as well as implementing other typical vehicle functions, such as AM, FM, DAB, V2X, Wi-Fi, Bluetooth, etc.

[0018] Typically, in the antenna module of this invention, the radiating elements do not have double helices, do not intersect, and do not contact each other. Instead, they have a single helical or non-helical geometry. Furthermore, whether composed of a single PCB or a single metal plate, each type of radiating element is an independent radiating element that can function as an independent antenna without cooperating with other radiating elements. In other words, the radiating elements are not part of a distributed structure, such as an array comprising multiple radiating elements that cooperate to perform antenna functions. Advantageously, this reduces size and complexity for each function, and the radiating elements can be properly arranged to minimize coupling. Attached Figure Description

[0019] Additional features of the invention will become clearer from the following detailed description, which is illustrative rather than limiting of embodiments, as shown in the accompanying drawings, wherein:

[0020] Figure 1 This is a perspective view of the antenna module according to the present invention;

[0021] Figure 2 yes Figure 1 Side view of the antenna module;

[0022] Figure 3 yes Figure 1 Top view of the antenna module;

[0023] Figure 3A It is a schematic diagram showing the intersection of the central axis of the radiating element and the horizontal plane of the base, and the projection of the intersection onto the longitudinal axis of the base;

[0024] Figure 4 yes Figure 1 The front view of the antenna module;

[0025] Figure 5 Is with Figure 1 The same view shows a radiating element composed of a PCB with conductive traces;

[0026] Figure 6 Is with Figure 4 The same view shows the traces on the PCB of the radiating element;

[0027] Figure 7 This is a perspective view of a second embodiment of the antenna module, in which the two radiating elements are conductive plates;

[0028] Figure 8 yes Figure 7 Side view of the antenna module;

[0029] Figure 9 yes Figure 7 Top view of the antenna module;

[0030] Figure 10 This is a perspective view of an example of the cover of the antenna module according to the present invention. Detailed Implementation

[0031] Referring to the accompanying drawings, an antenna module according to the present invention is disclosed, which is generally indicated by reference numeral 100.

[0032] The antenna module 100 includes a base 1 adapted to be fixed to a part of the vehicle body (e.g., the roof).

[0033] In the following description, the terms "front" and "rear" refer to the direction of travel of the vehicle and do not affect the fact that the antenna can be mounted on the vehicle in the opposite direction.

[0034] The base 1 is shaped like a rectangular or elongated plate, having a rear end 10 and a front end 11. The front end 11 has a tapering shape, and its dimensions decrease towards the front. The base 1 has a longitudinal axis X and a transverse axis Y intersecting at its center O. Figure 3 The longitudinal and transverse axes of the base coincide with the central longitudinal and transverse lines of the base. A vertical axis Z of the base can be defined, which is perpendicular to the plane formed by the X and Y axes of the base and passes through the center O.

[0035] refer to Figure 3 The base 1 has a length L and a width W, which is considered to be the maximum width, where the length L is more than three times the width W.

[0036] The handle 12 extends upward from the base, near the side edge of the base 1. The handle 12 is adapted to receive a fastening device such as a screw for securing a cover 200 with an aerodynamically elongated shape, like a shark fin. Figure 10 (As shown). Such a cover 200 has a rear portion 202 with maximum height and a tapered front portion 201 with decreasing height towards the front.

[0037] The lifting support 13 protrudes upward from the base 1 and extends from the rear end 10 to the front end 11 of the base. The front end 11 of the base is provided with a trapezoidal through groove 14.

[0038] The lift support 13 is plate-shaped and slightly thicker than the base 1. The lift support 13 has side edges with bends 15 surrounding the handle 12 to provide access to the handle 12. The lift support 13 can be integrally formed with the base. Advantageously, the base 1 and the lift support 13 are made of a zinc, aluminum, and magnesium alloy, known by the trade name ZAMA (ZAMAC or ZAMAK).

[0039] The motherboard 2 is mounted on the lifting support 13. The motherboard 2 can be implemented on a single PCB or can be divided into multiple PCBs arranged along a horizontal plane parallel to the base 1. The motherboard 2 has a generally rectangular shape and is provided with a rear end 20, a front end 21, a right edge 22, and a left edge 23.

[0040] refer to Figure 3 The length L1 of motherboard 2 is less than the length L of the base, and the width W1 is considered to be the maximum width, while the width W1 is less than the width W of the base. In any case, the length L1 of motherboard 2 is two and a half times the width W1 of motherboard 2.

[0041] Motherboard 2 has a vertical axis X1 and a horizontal axis Y1 that intersect at the center O1 of the motherboard. Figure 3 The vertical and horizontal axes of the motherboard coincide with the central vertical and horizontal lines of the motherboard. Clearly, the center O1 of the motherboard is positioned behind the center O of the base.

[0042] The vertical axis Z1 of the motherboard can be defined, which is perpendicular to the motherboard and passes through the center O1 of the motherboard.

[0043] The antenna module 100 includes a first pair of radiating elements, which includes a first radiating element 3 and a second radiating element 4 that function as two separate, independent antennas.

[0044] First and second radiating elements 3 and 4 are mounted on the main board 2. Each radiating element 3 and 4 has a longitudinal dimension, which is the dimension extending along the vertical axis Z. The radiating elements 3 and 4 are arranged in a substantially vertical position on the main board 2 and protrude upward from the main board along the longitudinal dimension of the radiating element.

[0045] Each radiating element 3, 4 can be a PCB or conductive board with a suitable shape. Figure 7-9 In this case, radiating elements 3 and 4 have a basic planar geometry.

[0046] Figure 3 The structure in which the first and second radiating elements 3 and 4 are arranged in the transverse direction is shown, that is, the plane of the radiating elements is orthogonal to the longitudinal axis X.

[0047] Figure 7A configuration is shown in which a first radiating element 3 is disposed in the transverse direction and is inclined relative to the vertical axis Z of the base, and a second radiating element 4 is disposed in the transverse orthogonal direction relative to the base 1.

[0048] The first and second radiating elements 3 and 4 have their own central axes a3 and a4. The central axis is a longitudinal axis that passes through the center of the radiating element and through the base 1.

[0049] refer to Figure 3A The base 1 has a horizontal plane, and the longitudinal axis X of the base is located on the horizontal plane.

[0050] exist Figure 3A At each intersection point P1 and P2 shown, the central axes a3 and a4 of the first and second radiating elements intersect with the horizontal plane of the base.

[0051] According to the present invention, the intersection points P1 and P2 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 and d2.

[0052] Furthermore, the projection axes J1 and J2 pass through intersection points P1 and P2 in directions orthogonal to the vertical axis X, and intersect the vertical axis X at different heights Q1 and Q2.

[0053] Therefore, the first radiating element 3 and the second radiating element 4 are not aligned with the longitudinal axis X of the base, that is, they are arranged asymmetrically with respect to the longitudinal axis X of the base.

[0054] Referring to the attached diagram, the first radiating element 3 is closer to the left edge 23 of the motherboard, and the second radiating element 4 is closer to the right edge 22 of the motherboard.

[0055] As mentioned earlier, the two radiating elements 3 and 4 are offset by distances d1 and d2 relative to the longitudinal axis X of the base. By changing the distances d1 and d2, the decoupling between the two antennas composed of radiating elements 3 and 4 can be altered, thereby setting the correct distance to maximize decoupling, as well as the uniformity and isotropy of the radiation pattern.

[0056] It must be taken into account that, due to the volume of cover 200, the maximum distances d1 and d2 between the first and second radiating elements and the longitudinal axis X are approximately 1 / 3 to 1 / 4 of the width W of base 1.

[0057] exist Figure 3 In the configuration shown, the first and second radiating elements 3 and 4 are arranged laterally relative to the motherboard 2, and the antenna module also includes a second pair of radiating elements, which include a third radiating element 5 and a fourth radiating element 6 that constitute two additional antennas. They are physically separate and perform different functions, which are separate from and different from the functions performed by the first and second radiating elements 3 and 4.

[0058] The third and fourth radiating elements 5 and 6 are arranged vertically on the main board 2 in the longitudinal direction, that is, the surface of the radiating elements is parallel to the longitudinal axis X of the base.

[0059] The third radiating element 5 and the fourth radiating element 6 are not aligned with the longitudinal axis X of the base. In other words, the third radiating element 5 and the fourth radiating element 6 are arranged in a parallel position and spaced apart from the longitudinal axis X of the base.

[0060] Moreover, the third radiating element 5 and the fourth radiating element 6 are not aligned with the longitudinal axis X of the base, that is, they are arranged asymmetrically with respect to the longitudinal axis X of the base.

[0061] The third and fourth radiating elements 5 and 6 each have their own central axes a5 and a6. The central axes a5 and a6 of the third and fourth radiating elements are located at... Figure 3A The intersection points P3 and P4 shown intersect with the horizontal plane of base 1.

[0062] Reference Figure 3A The intersection points P3 and P4 of the central axes a5 and a6 of the third and fourth radiating elements are set on both sides relative to the longitudinal axis X of the base, and are separated from the longitudinal axis X of the base by their respective distances d3 and d4.

[0063] In addition, the projection axes J3 and J4, which are orthogonal to the vertical axis X, pass through the intersection points P3 and P4 and intersect the vertical axis X at different heights Q3 and Q4.

[0064] In the same case, the maximum distances d3 and d4 between the first and second radiating elements and the longitudinal axis X can be approximately 1 / 3 to 1 / 4 of the width W of the base 1.

[0065] By changing the distances d3 and d4 between the intersection points P3 and P4 of the central axes of the third and fourth radiating elements relative to the longitudinal axis X of the base, the decoupling between the two antennas composed of the third and fourth radiating elements can be altered, thereby setting the correct distance to maximize decoupling, as well as the uniformity and isotropy of the radiation pattern.

[0066] Furthermore, if the antenna module 100 includes a first pair of radiating elements (composed of first and second radiating elements 3 and 4) in misaligned positions and a second pair of radiating elements (composed of third and fourth radiating elements 5 and 6) in misaligned positions, the radiation pattern of a single radiating element can be optimized by changing the misalignment of the individual radiating element.

[0067] Furthermore, the radiation pattern of each radiating element can be optimized by changing its heights Q1, Q2, Q3, and Q4 along the longitudinal axis X. Since the cover 200 has a tapered front portion 201, the heights Q1, Q2, Q3, and Q4 of each radiating element 3, 4, 5, and 6 along the longitudinal axis X will not cause the fourth radiating element 6 to be located at the front end of the base 1. Instead, the height Q1 of the first radiating element 3 is close to the rear end of the base, and the height Q4 of the fourth radiating element 6 is close to the centerline Y of the base.

[0068] refer to Figure 1 and 3 The third radiating element 5 is closer to the right edge 22 of the motherboard, and the fourth radiating element 6 is closer to the left edge 23 of the motherboard.

[0069] Advantageously, the first radiating element 3 is located near the rear end 20 of the motherboard. The second radiating element 4 is positioned close to the horizontal axis Y1, which coincides with the centerline of the motherboard. The third radiating element 5 is disposed between the first and second radiating elements 3 and 4. The fourth radiating element 6 is arranged at the front relative to the second radiating element 4, thus freeing the front of the base 1.

[0070] although Figure 3 An antenna module including four vertically extending radiating elements 3, 4, 5, and 6 is shown, but the antenna module may include more than four vertically extending radiating elements.

[0071] Furthermore, at least one of the third and fourth radiating elements 5 and 6 can be arranged in an inclined direction, that is, the plane of the radiating element is inclined relative to the longitudinal axis X of the base.

[0072] Reference Figure 1 and Figure 2 The third radiating element 5 is a PCB with an upper part 50 that protrudes from the rear and does not interfere with the first radiating element 3, because the first radiating element 3 is close to the right edge 22 of the motherboard and the third radiating element 5 is close to the left edge 23 of the motherboard.

[0073] Similarly, the fourth radiating element 6 is a PCB with an upper portion 60 that protrudes from the rear and does not interfere with the second radiating element 4, since the second radiating element 4 is close to the left edge 23 of the motherboard and the fourth radiating element 6 is close to the right edge 22 of the motherboard.

[0074] It must be noted that the four radiating elements 3, 4, 5, and 6 do not touch or intersect.

[0075] The fourth radiating element 6 does not extend into the front of the motherboard 2. In fact, an integrated circuit 7 with a square, circular, or rectangular shape can be arranged in the front of the motherboard 2, occupying a limited space in height and realizing the fifth patch antenna.

[0076] For illustrative purposes:

[0077] - The first radiating element 3 realizes the first antenna for mobile phones (LTE or 5G).

[0078] - The second radiating element 4 realizes a second antenna for mobile phones (LTE or 5G).

[0079] - The third radiating element 5 realizes an AM / FM antenna.

[0080] - The fourth radiating element 6 realizes the DAB antenna, and

[0081] - Integrated circuit 7 implements a GNSS / GPS antenna.

[0082] The telephone antenna implemented by the first and second radiating elements 3 and 4 can use the LTE (Long Term Evolution) standard used in fourth-generation (4G) cellular phones, or another standard for fifth-generation (5G) or higher cellular phones.

[0083] The AM / FM antenna implemented by the third radiating element 5 is a radio antenna with amplitude modulation / frequency modulation.

[0084] 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 for the transmission of sound for radio programs with better quality.

[0085] The GNSS / GPS antenna implemented by integrated circuit 7 is an antenna used to receive signals from the Global Navigation Satellite System (GNSS / GPS), a system that uses a network of artificial satellites and pseudo-satellites for geolocation and Earth navigation.

[0086] refer to Figure 5 The third and fourth radiating elements 3 and 4 are PCBs, which contain respective inductances generated by individual spiral coils 55 and 66, which are obtained through traces on the PCB.

[0087] refer to Figure 6 The first radiating element 3 comprises two branches of monopoles. One monopole is longer than the other and is partially folded. These monopoles are necessary to achieve frequency characteristics suitable for covering the two frequency bands allocated to the mobile phone. The longer monopole covers the lower frequency band, while the shorter monopole covers the higher frequency band.

[0088] The second radiating element 4 consists of a PCB containing a single pole and an inductor generated by a single spiral coil 45 obtained through traces on the PCB.

[0089] refer to Figure 7-9The first and second radiating elements 3 and 4 are composed of conductive traces made of metal plates of appropriate shape. When viewed in the front view, the conductive plates have a C-shaped shape with folded edges 35.

[0090] In any case, the conductive plate of each radiating element has a basically planar geometry and extends mostly in the vertical direction relative to the base 1.

[0091] Specifically, the first radiating element 3 has a central axis 3a that is tilted backward at an angle of approximately 10° to 40° relative to the vertical axis Z of the base.

[0092] The antenna module 100 of the present invention is envisioned for use on an elongated, narrow base 1, wherein the ratio of length L to width W is greater than 3. Furthermore, it must be considered that the width W of the base is typically less than 60 mm. If the radiating elements are arranged asymmetrically, this results in the proximity of radiating elements 3, 4, 5, and 6, which causes interference.

[0093] Furthermore, the tapered front portion 201 of the cover 200 must be taken into account. Therefore, the radiating elements 3, 4, 5, and 6, which have a certain height, must be arranged at the rear to prevent them from interfering with the cover. Alternatively, the integrated circuit 7 that implements the patch antenna can be arranged at the front.

Claims

1. An antenna module (100) for a vehicle, comprising: - a base (1) adapted to be fixed to a portion of the vehicle body along a horizontal plane; said base (1) has an elongated shape with a length (L) and a width (W), wherein the length (L) is more than three times higher than the width (W); said base has a longitudinal axis (X) extending along a longitudinal centre line of the base and a vertical axis (Z) extending orthogonally to the horizontal plane of the base, - a main plate (2) horizontally arranged on the base (1); said main plate (2) has an elongated shape with a length (LI) smaller than the length (L) of the base and a width (Wl) smaller than the width (W) of the base, wherein the length (LI) of the main plate (2) is two and a half times the width (Wl) of the main plate (2), - a first pair of radiating elements comprising a first radiating element (3) and a second radiating element (4), and - a second pair of radiating elements comprising a third radiating element (5) and a fourth radiating element (6), wherein the radiating elements (3, 4, 5, 6) protrude from the main plate (2) in the direction of the vertical axis (Z), each of the radiating elements realizing the function of an independent antenna without cooperating with the other radiating elements; the radiating elements (3, 4, 5, 6) have respective central axes (a3, a4, a5, a6) extending in the direction of the vertical axis (Z) and intersecting the horizontal plane of the base (1) at respective intersection points (PI, P2, P3, P4); the intersection points (PI, P2) of the central axes (a3, a4) of the first and second radiating elements (3, 4) are arranged on both sides with respect to the longitudinal axis (X) of the base and are spaced apart from the longitudinal axis (X) of the base by a distance (dl, d2); the intersection points (P3, P4) of the central axes (a5, a6) of the third and fourth radiating elements (5, 6) are arranged on both sides with respect to the longitudinal axis (X) of the base and are spaced apart from the longitudinal axis (X) of the base by a distance (d3, d4); projection axes (Jl, J2, J3, J4) orthogonal to the longitudinal axis (X) pass through said intersection points (PI, P2, P3, P4) of the central axes (a3, a4, a5, a6) of the radiating elements (3, 4, 5, 6) and intersect the longitudinal axis (X) at different heights (Ql, Q2, Q3, A4) of the longitudinal axis.

2. The antenna module (100) according to claim 1, wherein, said first and second radiating elements (3, 4) have a substantially planar geometry and are arranged in a transverse direction, i.e. with a plane of orthogonality with respect to the longitudinal axis (X).

3. The antenna module (100) according to claim 1, wherein, said first radiating element (3) is arranged near the rear end (20) of the main plate and said second radiating element (4) is arranged near a transverse axis (Yl) coinciding with the central axis of the main plate.

4. The antenna module (100) according to claim 3, wherein, said first radiating element (3) is arranged in a rearwardly inclined direction, i.e. the central axis (a3) of the radiating element is inclined rearwardly with respect to the longitudinal axis (Z) orthogonal to the horizontal plane of the base.

5. The antenna module (100) according to any one of the preceding claims, wherein, said third and fourth radiating elements (5, 6) have a planar geometry and are arranged in a longitudinal direction, i.e. the plane of the third radiating element is 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 planar geometry and at least one of the third and fourth radiating elements (5, 6) is arranged in an inclined direction, i.e. the plane of the radiating element is arranged in an inclined direction with respect to the longitudinal axis (X) of the base.

7. The antenna module (100) according to claim 6, wherein The first radiating element (3) is arranged near the rear end (20) of the main board; the second radiating element (4) is arranged near the transversal axis (Y1) which coincides with the median axis of the main board; the third radiating element (5) is arranged between the first and second radiating elements (3, 4) and the fourth radiating element (6) is arranged in front of the second radiating element (4).

8. The antenna module (100) according to claim 7, wherein, The third radiating element (5) is a PCB having an upper portion (50) which protrudes backwards and does not contact said first radiating element (3).

9. The antenna module (100) according to claim 7 or 8, wherein, The fourth radiating element (6) is a PCB having an upper portion (60) which protrudes backwards and does not contact the second radiating element (4).

10. The antenna module (100) according to claim 9, wherein, Said radiating elements (3, 4, 5, 6) do not contact and do not intersect.

11. The antenna module (100) according to the preceding claim 9, further comprising an integrated circuit (7) which implements a GNSS / GPS antenna and is arranged in the front portion of the main board (2) in a horizontal direction.

12. The antenna module (100) according to the preceding claim 9, 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 claim 9, wherein, The third radiating element (5) implements an AM / FM antenna and said fourth radiating element (6) implements a DAB antenna.

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