阅读说明：本技术 具有辐射元件布置的车辆天线模块 (Vehicle antenna module with radiating element arrangement ) 是由 A·诺塔里 M·齐尔莱特里 G·拉克诺 P·法奇尼 M·罗恩卡格利亚 G·卡梅利尼 于 2021-05-13 设计创作，主要内容包括：一种用于车辆的天线模块(100),包括：基座(1),其适用于固定到车身的一部分；主板(2),其水平地设置在该基座(1)上；第一、第二、第三和第四辐射元件(3、4、5、6),其从该主板(2)向上突出；第一和第二辐射元件(3、4)具有各自的中轴线(a3、a4),其在竖直轴(Z)的方向上延伸,并且在相对于基座的纵轴(X)设置在两侧的各自的交点(P1、P2)与基座(1)的水平面相交,并且与基座的纵轴(X)间隔开距离(d1、d2)；第三和第四辐射元件(5、6)具有各自的中轴线(a5、a6),其在竖直轴(Z)的方向上延伸,并且在相对于基座的纵轴(X)设置在两侧的各自的交点(P3、P4)与基座(1)的水平面相交,并且与基座的纵轴(X)间隔开距离(d3、d4)。(An antenna module (100) for a vehicle, comprising: a base (1) adapted to be fixed to a portion of a vehicle body; a main board (2) horizontally disposed on the base (1); first, second, third and fourth radiation elements (3, 4, 5, 6) protruding upward from the main board (2); the first and second radiating elements (3, 4) have respective central axes (a3, a4) which extend in the direction of the vertical axis (Z) and intersect the horizontal plane of the base (1) at respective intersection points (P1, P2) disposed on either side with respect to the longitudinal axis (X) of the base and spaced apart from the longitudinal axis (X) of the base by distances (d1, d 2); the third and fourth radiating elements (5, 6) have respective central axes (a5, a6) which extend in the direction of the vertical axis (Z) and intersect the horizontal plane of the base (1) at respective intersection points (P3, P4) arranged on either side with respect to the longitudinal axis (X) of the base and are spaced apart from the longitudinal axis (X) of the base by distances (d3, d 4).)

1. An antenna module (100) for a vehicle, comprising:

-a base (1) adapted to be fixed to a portion of the bodywork along a horizontal plane; the 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 having a longitudinal axis (X) extending along a longitudinal centerline of the base and a vertical axis (Z) extending normal to the horizontal plane of the base,

-a main plate (2) horizontally arranged on the base (1); said main plate (2) having an elongated shape with a length (L1) smaller than the length (L) of the base and a width (W1) smaller than the width (W) of the base, wherein the length (L1) of the main plate (2) is twice and half the width (W1) 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 board (2) in the direction of the vertical axis (Z), each of which performs the function of an independent antenna without cooperating with other radiating elements;

the radiating elements (3, 4, 5, 6) have respective central axes (a3, a4, a5, a6) which extend in the direction of the vertical axis (Z) and intersect the horizontal plane of the base (1) at respective intersection points (P1, P2, P3, P4);

the intersection point (P1, P2) of the central axes (a3, a4) of the first and second radiating elements (3, 4) is arranged on both sides with respect to the longitudinal axis (X) of the base and is spaced apart from the longitudinal axis (X) of the base by a distance (d1, d 2);

the intersection point (P3, P4) of the central axes (a5, a6) of the third and fourth radiating elements (5, 6) is arranged on both sides with respect to the longitudinal axis (X) of the base and is spaced apart from the longitudinal axis (X) of the base by a distance (d3, d 4);

projection axes (J1, J2, J3, J4) orthogonal to the longitudinal axis (X) intersect the longitudinal axis (X) at different heights (Q1, Q2, Q3, a4) of the longitudinal axis through said intersection points (P1, P2, P3, P4) of the central axes (A3, a4, a5, a6) of the radiation units (3, 4, 5, 6).

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

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

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

5. The antenna module (100) according to any of the preceding claims, wherein the 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 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 oblique direction, i.e. the plane of the radiating element is arranged in an oblique 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 a transverse axis (Y1), the transverse axis (Y1) is coincident with the central 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), the upper portion (50) protruding backwards and not contacting the 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), the upper portion (60) protruding backwards and not contacting the second radiating element (4).

10. The antenna module (100) according to any of claims 6 to 9, wherein the radiating elements (3, 4, 5, 6) are non-contacting and do not intersect.

11. The antenna module (100) according to any of the preceding claims, further comprising an integrated circuit (7) implementing a GNSS/GPS antenna and arranged in the front part of the motherboard (2) in a horizontal direction.

12. The antenna module (100) according to any of the preceding claims, wherein the first radiating element (3) realizes a first antenna for LTE or 5G phones and the second radiating element (4) realizes a second antenna for LTE or 5G phones.

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

Technical Field

The present invention relates to an antenna module of a vehicle with a specific arrangement of radiating elements, which enables different functions of the antenna in a reduced space and without affecting the aerodynamic properties of the vehicle.

Background

In the automotive field, antennas are usually arranged on the roof of a vehicle. Antennas are known in which components are arranged in an aerodynamic box shaped like a shark fin to reduce air friction.

However, in addition to the functions of radio receivers having AM and FM frequencies, antennas have recently also had other functions, such as signal transceivers for mobile phones and GPS signals and digital radios. Therefore, the antenna module requires the addition of components consisting of radiating elements, which cannot be accommodated in shark fins of standardized dimensions. Furthermore, if they are placed too close to each other, the radiating elements generate interference due to signal coupling.

CN107181047 discloses a vehicle antenna, comprising: a first radiating element formed with a double helix on a PCB and a second radiating element having a capacitive loading element. The second radiating element has a triangular shape, is arranged orthogonal to the first radiating element and is provided with a cut in which the third radiating element is inserted. The radiating elements are aligned with respect to a central longitudinal axis of the antenna. The intersection between the radiating elements and their alignment results in signal coupling between the various radiating elements.

CN106099322A discloses an antenna comprising three radiating elements 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 with respect to the central longitudinal axis of the antenna. A geometrical distribution in which the various radiating elements are arranged in a line along the longitudinal axis generally tends to prioritize one radiation direction over the other, or in the worst case, to produce a truly zero radiation in some directions due to the shielding effect of the radiating elements derived from the proximal end.

CN204885432 discloses an antenna assembly with a plurality of 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, in any case centered and symmetrical with respect to the longitudinal axis of the antenna, thus leading to the above-mentioned drawbacks.

EP2622682a1 discloses a multifunctional antenna consisting of a plurality of radiating elements: two patch antennas for GNSS and SDARS functions and two antennas for LTE and AM-FM functions, which are obtained by vertically placed PCBs. The AM-FM antenna is implemented in a distributed manner on three vertical PCBs: a central PCB disposed along the longitudinal axis, and two end PCBs disposed laterally and joined at ends of the central PCB. The assembly of three PCBs recreates a comprehensive antenna structure by implementing conductive traces on each PCB and a grid of conductors disposed between the end PCBs. The end PCB also performs an inductive load function for the antenna. Distributed AM/FM antennas suffer from several drawbacks due to their large volume and complexity of manufacture. Furthermore, the radiating elements with the vertical LTE PCB are perfectly 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 antenna and the AM-FM antenna.

WO2017076750 discloses an antenna unit comprising: a horizontally disposed main PCB as a base; two LTE antennas, including a PCB; two Wi-Fi antennas, which are composed of a monopole antenna and two patch antennas. The base is rectangular, non-elongated in shape with a ratio of short to long sides of about 7/11. Due to the shape of the base, the antenna can be arranged at a sufficient distance to avoid interference. In practice, the two LTE antennas are disposed near the edge of the short side of the base and are axisymmetric with respect to the center line. The two Wi-Fi antennas are located near the edge of the main edge of the base at offset positions; the two patch antennas are arranged at the central position of the base. A non-elongated parallelepiped cover is coupled with the base to cover the antenna. Obviously, such a cover is not aerodynamic when arranged on the roof of a vehicle.

US018109006a1 discloses an antenna assembly comprising: a horizontally disposed main PCB serving as a base; and a plurality of Wi-Fi, LTE, and patch antennas. The base has a circular shape. In this case, in order to avoid interference between the antennas, the Wi-Fi and LTE antennas are disposed at peripheral positions near the circular edge of the base, and the patch antenna is disposed at a central position of the base. A cover shaped like a portion of a sphere is coupled with the base to cover the antenna. Obviously, such covers are not as aerodynamic as elongated covers.

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 equidistantly spaced from each other and cooperating to act as an antenna. In this case a control unit must be provided to control the power of the radiating elements, determining the amplitude and phase of the signal to be transmitted to each radiating element. This type of application is used for high directivity antennas and cannot be used for omni-directional antennas, such as vehicle antennas.

Disclosure of Invention

The object of the present invention is to eliminate the drawbacks of the prior art by disclosing an antenna module for a vehicle with an elongated aerodynamic shape, suitable for being arranged on the roof of the vehicle, and with a specific arrangement of the radiating elements to optimize the bulk, while ensuring a proper decoupling between the radiating elements.

Another object of the invention is to disclose an antenna module for a vehicle having different functions, at the same time having an elongated aerodynamic shape, having reduced dimensions and being easy to implement and install.

According to the invention, these objects are achieved by the features of the independent claim 1.

Advantageous embodiments of the invention result from the dependent claims.

An antenna module for a vehicle according to the invention is defined in claim 1.

The antenna module according to the invention comprises at least four radiating elements which are distributed in space in a substantially transverse and longitudinal and/or oblique direction with respect to an axis of the antenna module extending over a main dimension of the antenna module, which coincides with a driving direction of the vehicle. The radiating elements include a first pair of radiating elements that are offset on both sides with respect to the longitudinal and transverse axes of the antenna module, and a second pair of radiating elements that are offset on both sides with respect to the longitudinal and transverse axes of the antenna module.

The radiating elements act as individual omnidirectional antennas.

In this way, the mutual influence of the radiating elements and the radiation pattern of the individual elements can be optimized. In fact, by varying the misalignment of the radiation module in the longitudinal and transverse axes of the antenna module, the azimuthal distribution of the maxima and minima of the radiation can be optimized, obtaining the following radiation pattern: for each radiating element, it should be as isotropic (omnidirectional) as possible.

The invention provides for misalignment of the radiating elements as much as possible in a controlled manner, i.e. at least two radiating elements that are misaligned with respect to the longitudinal and transverse axes of the antenna module, in order to minimize or in any case optimize the mutual interference that inevitably occurs (also when the various radiating elements are dedicated to different functions and have different operating frequencies).

The antenna module of the present invention includes a plurality of radiating elements that support multiple functions of a vehicle antenna, such as a telephone function, which is commonly used for voice and/or data connections, with single or dual radiating elements, and implements other typical vehicle functions, such as AM, FM, DAB, V2X, Wi-Fi, bluetooth, etc.

Generally, in the antenna module of the present invention, the radiating elements do not have a double helix, do not intersect and do not contact each other. Rather, they have a single helical or non-helical geometry. Furthermore, whether comprised of a single PCB or a single metal plate, each type of radiating element is a separate radiating element that can act as a separate antenna without the need for cooperation with other radiating elements. In other words, the radiating elements are not part of a distributed architecture, for example, an array comprising a plurality of radiating elements that cooperate to perform the antenna function. Advantageously, the volume and complexity is reduced for each function, and the radiating elements can be arranged correctly so as to minimize coupling.

Drawings

Additional features of the invention will become apparent from the following detailed description, which is intended by way of illustrative only and not by way of limitation, and the accompanying drawings, in which:

fig. 1 is a perspective view of an antenna module according to the present invention;

fig. 2 is a side view of the antenna module of fig. 1;

fig. 3 is a top view of the antenna module of fig. 1;

fig. 3A is a schematic diagram showing the intersection of the central axis of the radiating element with the horizontal plane of the base and the projection of said intersection on the longitudinal axis of the base;

fig. 4 is a front view of the antenna module of fig. 1;

fig. 5 is the same view as fig. 1, showing a radiating element consisting of a PCB with conductive tracks;

fig. 6 is the same view as fig. 4 showing traces on the PCB of the radiating element;

fig. 7 is a perspective view of a second embodiment of an antenna module in which the two radiating elements are conductive plates;

fig. 8 is a side view of the antenna module of fig. 7;

fig. 9 is a top view of the antenna module of fig. 7;

fig. 10 is a perspective view of an example of a cover of an antenna module according to the present invention.

Detailed Description

Referring to the drawings, an antenna module in accordance with the present invention is disclosed and is generally indicated by reference numeral 100.

The antenna module 100 comprises a base 1, which base 1 is adapted to be fixed to a part of a vehicle body, such as a vehicle roof.

In the following description, the terms "front" and "rear" refer to the direction of travel of the vehicle without affecting the fact that the antenna may be mounted on the vehicle in opposite directions.

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 having a tapered shape and decreasing in size towards the front. The susceptor 1 has a longitudinal axis X and a transverse axis Y (fig. 3) intersecting at the center O of the susceptor. The longitudinal axis and the transverse axis of the base coincide with the central longitudinal line and the transverse line of the base. A vertical axis Z of the base can be defined, which is perpendicular to the plane formed by the axes X and Y of the base and passes through the center O.

Referring to fig. 3, the base 10 has a length L and a width W, considered the maximum width, wherein the length L is greater than three times the width W.

The handle 12 projects upwardly from the base, adjacent a side edge of the base 1. The shank 12 is adapted to receive a securing device, such as a screw, for securing a cover 200 having an aerodynamically elongated shape, such as a shark fin (shown in FIG. 10). Such a cover 200 has a rear portion 201 with a maximum height and a tapered front portion 202 that decreases in height forwardly.

The lifting support 13 projects upwardly from the base 1 and extends from the rear end 10 to the front 11 of the base. The front portion 11 of the base is provided with a trapezoidal through slot 14.

The raised support 13 is shaped like a plate, with a thickness slightly higher than the base 1. The elevated support 13 has a side edge with a bend 15 around the shank 12 to provide access to the shank 12. The elevation support 13 may be integrally formed with the base. Advantageously, the base 1 and the raised support 13 are made of zinc, aluminium and magnesium alloys, which are well known under the trade name ZAMA (ZAMAC or ZAMAK).

The main plate 2 is arranged on the elevated support 13. The main board 2 may be implemented on one PCB or may be divided into a plurality of PCBs arranged along a horizontal plane parallel to the base 1. The main plate 2 has a substantially rectangular shape provided with a rear end 20, a front end 21, a right side edge 21 and a left side edge 22.

Referring to fig. 3, the length L1 of the main board 2 is smaller than the length L of the susceptor, and the width W1, which is regarded as the maximum width, and the width W1 is smaller than the width W of the susceptor. In any case, the length L1 of main panel 2 is two and a half times the width W1 of main panel 2.

The main plate 2 has a longitudinal axis X1 and a transverse axis Y1 (fig. 3) intersecting at the center O1 of the main plate. The longitudinal axis and the transverse axis of the main plate coincide with the central longitudinal line and the central transverse line of the main plate. Obviously, the center O1 of the main plate is disposed at a rear position with respect to the center O of the base.

A vertical axis Z1 of the main plate can be defined, which is perpendicular to the main plate and passes through the center O1 of the main plate.

The antenna module 100 comprises a first pair of radiating elements comprising a first radiating element 3 and a second radiating element 4 that fulfil the function of two separate independent antennas.

The first and second radiating elements 3, 4 are mounted on the main board 2. Each radiating element 3, 4 has a longitudinal dimension, which is a dimension extending along the vertical axis Z. The radiating elements 3, 4 are arranged in a substantially vertical position on the main plate 2 and project upwards from the main plate along the longitudinal dimension of the radiating elements.

Each radiating element 3, 4 may be a PCB or a conductive plate with a suitable shape (fig. 7-9). In this case, the radiating elements 3, 4 have a substantially planar geometry.

Fig. 3 shows a structure in which the first and second radiating elements 3, 4 are arranged in a transverse direction, i.e. the plane of the radiating elements is orthogonal to the longitudinal axis X.

Fig. 7 shows a configuration in which the first radiating element 3 is arranged in a transverse direction and inclined with respect to the vertical axis Z of the base, and the second radiating element 4 is arranged in a transverse orthogonal direction with respect to the base 1.

The first and second radiating elements 3, 4 have respective central axes a3, a 4. The central axis is the longitudinal axis through the center of the radiating element and through the base 1.

Referring to fig. 3A, the base 1 has a horizontal plane on which the longitudinal axis X of the base lies.

In each intersection point P1, P2 shown in fig. 3A, the central axes a3, a4 of the first and second radiating elements intersect the horizontal plane of the base.

According to the invention, the points of intersection P1, P2 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 distances d1, d 2.

Further, the projection axes J1, J2 pass through the intersection points P1, P2 in the orthogonal direction with respect to the longitudinal axis X, and intersect the longitudinal axis X at different heights Q1, Q2 of the longitudinal axis.

Thus, the first radiating element 3 and the second radiating element 4 are not aligned with respect to the longitudinal axis X of the base, i.e. they are arranged asymmetrically with respect to the longitudinal axis X of the base.

Referring to the figure, the first radiating element 3 is closer to the left side edge 22 of the main board and the second radiating element 4 is closer to the right side edge 23 of the main board.

As previously mentioned, 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 distances d1, d2, the decoupling between the two antennas consisting of the radiating elements 3, 4 can be varied, setting the correct distance to maximize the decoupling, and the uniformity and isotropy of the radiation pattern.

It must be considered that, due to the volume of the cover 200, the maximum distances d1, d2 of the first and second radiating elements from the longitudinal axis X are approximately 1/3-1/4 of the width W of the base 1.

In the configuration shown in fig. 3, the first and second radiating elements 3, 4 are arranged transversely with respect to the main board 2, and the antenna module also comprises a second pair of radiating elements comprising a third radiating element 5 and a fourth radiating element 6 constituting two additional antennas, which are physically separate and fulfill different functions, which in turn are separate and different from the functions fulfilled by the first and second radiating elements 3, 4.

The third and fourth radiating elements 5, 6 are arranged perpendicularly on the main plate 2 in the longitudinal direction, i.e. the surfaces of the radiating elements are parallel to the longitudinal axis X of the base.

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

Moreover, the third and fourth radiating elements 5, 6 are not aligned with respect to the longitudinal axis X of the base, i.e. they are arranged asymmetrically with respect to the longitudinal axis X of the base.

The third and fourth radiating elements 5, 6 have respective central axes a5, a 6. The central axes a5, a6 of the third and fourth radiating elements intersect the horizontal plane of the base 1 at respective intersection points P3, P4 shown in fig. 3A.

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 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 respective distances d3, d 4.

In addition, projection axes J3, J4, which are orthogonal to the longitudinal axis X, intersect the longitudinal axis X at different heights Q3, Q4 of the longitudinal axis, passing through intersection points P3, P4.

Also in this case, the maximum distances d3, d4 of the first and second radiating elements from the longitudinal axis X may be approximately 1/3-1/4 of the width W of the base 1.

By varying the distances d3, d4 of the intersection points P3, P4 of the central axes of the third and fourth radiating elements with respect to the longitudinal axis X of the base, the decoupling between the two antennas consisting of the third and fourth radiating elements can be varied, setting the correct distance to achieve the maximum decoupling, as well as the uniformity and isotropy of the radiation pattern.

Furthermore, if the antenna module 100 comprises a first pair of radiating elements (consisting of the first and second radiating elements 3, 4) in a misaligned position and a second pair of radiating elements (consisting of the third and fourth radiating elements 5, 6) in a misaligned position, the radiation pattern of a single radiating element can be optimized by changing the misalignment of the single radiating element.

Furthermore, by varying the height Q1, Q2, Q3, Q4 of each radiating element 3, 4, 5, 6 along the longitudinal axis X, the radiation pattern of the radiating element can be optimized. Since the cover 202 has a tapered front portion 201, the height Q1, Q2, Q3, Q4 of each radiating element 3, 4, 5, 6 along the longitudinal axis X does not result in the fourth radiating element 6 being located at the front end of the base 1. While 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 centre line Y of the base.

Referring to fig. 1 and 3, the third radiating element 5 is closer to the right side edge 23 of the main board and the fourth radiating element 6 is closer to the left side edge 22 of the main board.

Advantageously, the first radiating element 3 is close to the rear end 20 of the main plate. The second radiating element 4 is arranged close to a transverse axis Y1 coinciding with the centre line of the main plate. The third radiating element 5 is arranged between the first and second radiating elements 3, 4. The fourth radiating element 6 is arranged at the front with respect to the second radiating element 4, leaving the front of the base 1 free.

Although fig. 3 shows an antenna module comprising four vertically extending radiating elements 3, 4, 5, 6, the antenna module may comprise more than four vertically extending radiating elements.

Furthermore, at least one of the third and fourth radiating elements 5, 6 may be arranged in an oblique direction, i.e. the plane of the radiating element is inclined with respect to the longitudinal axis X of the base.

Referring to fig. 1 and 2, the third radiating element 5 is a PCB having an upper portion 50 that protrudes from the rear and does not interfere with the first radiating element 3, since the first radiating element 3 is close to the right side edge 22 of the main board and the third radiating element 5 is close to the left side edge 23 of the main board.

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.

It has to be noted that the four radiating elements 3, 4, 5, 6 do not touch nor intersect.

The fourth radiating element 6 does not extend in the front part of the main board 2. In practice, the integrated circuit 7 having a square, circular or rectangular shape may be arranged at the front of the main board 2, occupying a limited space in height and implementing the fifth patch antenna.

For purposes of illustration:

the first radiating element 3 implements a first antenna for a mobile phone (LTE or 5G),

the second radiating element 4 implements a second antenna for a mobile phone (LTE or 5G),

the third radiating element 5 implements an AM/FM antenna,

the fourth radiating element 6 realizes a DAB antenna, and

the integrated circuit 7 implements a GNSS/GPS antenna.

The telephone antenna implemented by the first and second radiating elements 3, 4 may use the LTE (long term evolution) standard used by fourth generation (4G) cellular telephones, or another standard of fifth generation (5G) or higher cellular telephones.

The AM/FM antenna realized by the third radiating element 5 is a radio antenna with amplitude/frequency modulation.

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 sound transmission of radio programs with better quality.

The GNSS/GPS antenna implemented by the integrated circuit 7 is an antenna for receiving signals from a global navigation satellite system (GNSS/GPS), which is a system for geolocation and earth navigation using a network of artificial satellites and pseudolites.

Referring to fig. 5, the third and fourth radiating elements 3, 4 are PCBs containing respective inductances produced by the single spiral coils 55, 66, the single spiral coils 55, 66 being obtained by means of traces on the PCB.

Referring to fig. 6, the first radiating element 3 comprises two branches of monopoles. One monopole is longer than the other and is partially folded. The monopole is necessary to achieve a frequency characteristic suitable for operation covering the two sets of frequency bands allocated to the mobile phone. The longer monopole covers the lower frequency band and the shorter monopole covers the higher frequency band.

The second radiating element 4 consists of a PCB containing a monopole and an inductance generated by a single spiral coil 45, the single spiral coil 45 being obtained by means of a trace on the PCB.

Referring to fig. 7-9, the first and second radiating elements 3, 4 are constituted by conductive tracks made of metal plates of suitable shape. The conductive plate has a C-shape with a folded edge 35 when viewed in front elevation.

In any case, the conductive plate of each radiating element has a substantially planar geometry and extends for the most part in a vertical direction with respect to the base 1.

In particular, the first radiating element 3 has a central axis 3a which is inclined backwards by an angle of about 10 ° to 40 ° with respect to the vertical axis Z of the base.

The antenna module 100 of the present invention is envisaged for use with an elongated narrow base 1 in which the ratio of the length L to the width W is greater than 3. Furthermore, it must be considered that the width W of the susceptor is generally less than 60 mm. If the radiating elements are arranged asymmetrically, this results in a close proximity of the radiating elements 3, 4, 5, 6, which generates interference.

Moreover, it must be considered that the cover 200 has a tapered front 202. Therefore, the radiating elements 3, 4, 5, 6, which have a certain height, must be arranged at the rear to prevent them from interfering with the cover. Instead, the integrated circuit 7 implementing the patch antenna may be arranged in front.