EP4460871A1 - Module d'antenne pour véhicule - Google Patents
Module d'antenne pour véhiculeInfo
- Publication number
- EP4460871A1 EP4460871A1 EP23707734.2A EP23707734A EP4460871A1 EP 4460871 A1 EP4460871 A1 EP 4460871A1 EP 23707734 A EP23707734 A EP 23707734A EP 4460871 A1 EP4460871 A1 EP 4460871A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna module
- antenna
- card
- elastic element
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
- H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/005—Damping of vibrations; Means for reducing wind-induced forces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2291—Supports; Mounting means by structural association with other equipment or articles used in Bluetooth® or Wi-Fi® devices of Wireless Local Area Networks [WLAN]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
Definitions
- the present invention relates to the field of antennas for road vehicles, and more particularly targets a vertical antenna module integrated into a roof spoiler of a vehicle.
- Antennas for motor vehicles of this type are conventionally housed in an antenna box located on the roof of the vehicle and protected by a cover, for example a fin-shaped cover, mounted on a base.
- the antenna module comprises a first horizontal printed circuit, on which is arranged vertically at least one second printed circuit comprising one or more particular antenna patterns.
- the second printed circuit constitutes the antenna itself which can be electrically connected to one face of the first circuit via a connector fixed to the first card, forming a clamp into which the second card is inserted.
- a mode of connection between the first and the second circuit is cumbersome and expensive.
- the second circuit can be connected to the first circuit by soldering.
- this is a delicate operation which complicates the assembly stage and poses reliability problems over time, in particular due to vibration phenomena and/or deformations due to temperature changes which can weaken the welds. .
- an antenna module for a vehicle comprising: a first main printed circuit board housed horizontally in a housing, at least a second printed circuit board comprising a radio frequency antenna, mounted vertically on the first printed circuit board and projecting from an upper face of the housing, a cover, mounted on said housing, configured to cover at least the second printed circuit board.
- the antenna module is remarkable in that the cover comprises a shell and an elastic element, the elastic element being configured to exert pressure on the upper edge of the second card when the cover is in place on the housing in order to ensure electrical contact between the lower edge of the second card and at least one flexible contact element on the surface of the first card.
- the flexible contact element with which the lower edge of the second card comes into contact makes it possible to absorb the games and relative movements of one card relative to the other, thus ensuring permanent contact.
- the elastic element placed between the cover and the upper edge of the second card exerts vertical pressure on the second card making it possible to ensure that the lower edge of the second card is pressed against the flexible contact elements arranged on the surface of the first card.
- the assembly of the antenna module is thus facilitated and a soldering step is avoided while guaranteeing good electrical continuity between the first and second cards. This results in a robust, reliable and easy-to-assemble antenna module.
- the elastic element is configured to exert pressure on the upper edge of the second card via at least one interference presser.
- the applied element exerts a point force on one or more points of the upper edge of the antenna.
- the applied force is thus controlled, unlike continuous contact along the length of the upper edge of the antenna, where irregularities in the cutting of the antenna and/or in the molding of the elastic element would make the force of pressure exerted and its distribution on the antenna.
- the at least one flexible contact element is of the spring finger type.
- the at least one flexible contact element is made of a conductive elastomer material.
- a flexible conductive elastomer contact also offers greater resistance to the risk of tearing and/or deformation during handling, unlike metal Z-spring or clamp-type contacts.
- the second card comprises at least one shoulder forming a stop bearing on the housing to limit the crushing of the at least one flexible contact element by the lower edge of the second card.
- the shoulder abutting against the housing limits the vertical travel of the antenna. The crushing of the flexible contact points is thus controlled. This prevents excessive crushing of the flexible contacts from producing permanent deformation of the contact points and an alteration of electrical continuity. Such an arrangement improves the reliability of the antenna module.
- the elastic element is produced by overmolding an internal part of the shell with a thermoplastic elastomer.
- Overmolding allows for better positioning precision of the flexible element.
- it can be produced in an automated manner, unlike an attached part, particularly to be handled by a robot given the flexibility required.
- the quality and production cost of the antenna module are thus improved.
- the elastic element comprises at least one pair of lateral ribs configured to accommodate the upper edge of the second card and limit its lateral movements.
- the upper part of the antenna is thus held laterally. This avoids the appearance of vibration phenomena likely to cause noise and alter the contact between the vertical card and the main card. Unlike other techniques in which the upper part of the card is held by formations provided for this purpose inside the cover like a slot, the insertion of the printed circuit card including the antenna between flexible ribs carried out can be carried out with controlled mechanical effort, facilitating assembly and causing no stress to the printed circuit.
- the elastic element has a hardness of between 45 and 55 shore A, preferably 50 shore A.
- the elastomer is also formulated to provide a low dielectric loss tangent so as not to disrupt the operation of the vertical antennas sheltered by the cover.
- the invention relates to a vehicle comprising an antenna module as described above.
- Such a vehicle has at least advantages similar to those conferred on the antenna module described above.
- Figure 1 is a perspective view of an antenna module according to a particular embodiment.
- Figure 2 is an exploded view of an antenna module according to a particular embodiment.
- Figure 3 is a sectional view of an antenna module according to a particular embodiment, taken along the section line A-A shown in Figure 1
- Figure 4 is a view from below of the interior of the cover comprising an elastic element and a PCB antenna, according to a particular embodiment.
- FIG. 1 represents a perspective view of an antenna module 100 according to a particular embodiment.
- the antenna module 100 is intended to be integrated into the roof of a vehicle and comprises a housing 102 on which a cover 101 is fixed.
- the housing 102 comprises at least one connector 103 intended to connect an electronic card included in the housing 102 to at least one device of the vehicle in which the antenna module is integrated.
- FIG. 2 is an exploded view of the antenna module 100 according to a particular embodiment.
- the housing 102 is composed of a lower part 200 and an upper part 202 between which is arranged horizontally a main printed circuit board 201, called a motherboard.
- the lower 200 and upper 202 parts of the housing are for example assembled by a set of screws.
- the upper part 202 is made of metal in order to ground the module to the vehicle and to shield the junction between the antennas and the main card.
- the motherboard 201 can be composed of a single card comprising, for example, power supply circuits, baseband signal processing circuits and a radio frequency processing circuit. However, without modifying the invention, the motherboard can be made up of separate cards supporting different circuits.
- the upper part 202 of the housing comprises a recess 203 through which one or more vertical PCB antennas 205a, 205b protrude.
- PCB antenna means printed circuit boards on which one or more tracks forming an antenna pattern are traced and/or printed circuit boards comprising one or more three-dimensional antennas, such as a wire extending on the board, a metallic element or even a chip antenna.
- the figures illustrating a particular embodiment of the antenna module show two PCB antennas 205a and 205b, the number and position of these antennas can vary without modifying the invention.
- the antenna module may include a single antenna 205a.
- the present description will endeavor to describe the characteristics of the invention in relation to the antenna 205a, the same inventive concepts applying in an analogous manner to the antenna 205b and/or to other vertical PCB antennas which may be included in the antenna module.
- the antenna 205a is for example configured to allow the transmission and/or reception of radio frequency signals. It may be an antenna for receiving an analog or digital radio signal, a Wi-Fi signal, or even an antenna for establishing connections to a cellular access network, for example a 2G, 3G, 4G or 5G access network.
- the PCB antenna 205a is arranged perpendicular to the motherboard 201.
- the antenna module comprises a guide element 204 for maintaining the PCB antenna 205a in a vertical position, perpendicular to the motherboard.
- the guide element is constituted by a particular formation of the upper part 202 of the housing.
- FIG. 2 also shows a cover 101 in the shape of a “shark fin” intended to cover the antenna 205a.
- the cover 101 comprises a shell 206 made of a non-metallic material and fixed to the upper part 202 of the housing, for example by screws or clips, as well as an elastic element 207.
- the elastic element 207 is interposed between the upper internal part of the shell 206 and the upper part of the antenna 205a so that at least part of the elastic element 207 is in contact with the upper internal part of the shell 206 and the upper edge of the PCB antenna 205a.
- the elastic element is preferably a thermoplastic elastomer (TPE, for Thermoplastic Elastomer) of low hardness, for example 50 Shore A, and having a low dielectric loss tangent, preferably less than 0.07 at 6 GHz.
- the elastic element 207 is overmolded in the shell 206. Note that the upper part of the shell 206 and the upper edge of the antenna 205a have a substantially identical profile.
- the shell 206 is intended to protrude from the roof of a vehicle, its shark fin shape makes it possible to limit aerodynamic disturbances.
- the shape of the antenna 205a is thus adapted to optimally occupy the interior of the shell 206 and to allow the elastic element 207 to be inserted between the shell 206 and the antenna 205a using a minimum of material .
- Figure 3 is a longitudinal section of the assembled antenna module, along a section line A-A shown in Figure 1.
- Figure 3 shows flexible contacts 300 intended to electrically connect the antenna 205a to the motherboard 201.
- the contacts flexible 300 are in contact with a conductive part of the lower edge of the antenna 205a and connected to a circuit of the motherboard. They thus allow electrical continuity between the antenna 205a and the motherboard while allowing relative movement of the antenna 205a relative to the motherboard 201.
- the flexible contact points 300 are spring-type contact fingers.
- the flexible contact points 300 are made of a conductive elastomer material, for example a resilient silicone elastomer loaded with copper particles.
- the motherboard 201 can for example include a single flexible contact point 300.
- the antenna 205a comprises at least one shoulder 301 configured to rest on a portion of the upper part 202 of the housing so as to guarantee a minimum spacing between the lower edge of the antenna 205a and the motherboard and limit the crushing of the 300 contact points.
- Figure 3 shows two interference pressers 302 formed by the elastic element 207 and configured to exert pressure on the upper edge of the antenna 302 when the shell 206 is in place and thus ensure that the shoulders 301 are pressed against the housing and minimum crushing of the flexible contact points 300.
- the width of a presser is for example between 1.5 and 3 millimeters.
- interference presser is meant a part of the elastic element 207 whose height is greater than the space available between the top of the internal part of the shell 206 and the upper edge of the antenna 205a, so that when the cover is in place, the elastic element 207 is compressed between the shell 206 and the antenna 205a and exerts vertical pressure from top to bottom on the upper edge of the antenna 205a.
- the upper edge of the antenna 205a comprises at least one horizontal portion 303 on which a presser 302 applies pressure, so that the pressure is exerted vertically on the card.
- Figure 4 is an interior view of the cover 101 according to a particular embodiment on which the elastic element 207 and the antenna 205a can be seen.
- Figure 4 shows lateral holding elements, such as a pair of ribs 400, arranged opposite each other and configured to accommodate the PCB antenna 205a and limit its lateral movements.
- ribs are for example 2 to 5 millimeters wide.
- Such an arrangement allows the upper part of the antenna 205a to be maintained when the cover 101 is put in place and the damping of vibration phenomena likely to appear in the upper part of the antenna 205a.
- the insertion of the upper part of the antenna 205a between the ribs when installing the cover 101 can be carried out with controlled mechanical effort, thus limiting the stress caused to the cards.
- Figure 4 shows a conductive part 501 of the lower edge of the antenna 205a intended to establish electrical contact with the flexible contacts 300 of the motherboard described above.
- a particular embodiment of the antenna module may include several PCB antennas.
- Figures 2, 3 and 4 show a second vertical PCB antenna 205b, arranged perpendicular to the motherboard, the plane of the antenna 205b being perpendicular to the plane of the antenna 205a.
- Figure 4 shows a presser 401 formed in the elastic element 207 and configured to exert pressure on the upper edge of the antenna 205b in order to press the latter against a flexible contact element on the surface of the motherboard.
- the antenna 205b comprises at least one shoulder denoted 206 in Figure 2 configured to bear on the upper part 202 of the housing and limit the crushing of a flexible contact referenced 300 in Figure 3 allowing electrical continuity between the antenna 205b and the motherboard 201.
- the lateral movements of the antenna 205b are limited by holding elements referenced 402 in Figure 4, like ribs or tongues, formed by the flexible element 207.
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Support Of Aerials (AREA)
- Details Of Aerials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2201959A FR3133274B1 (fr) | 2022-03-07 | 2022-03-07 | Module d’antenne pour véhicule |
| PCT/EP2023/055103 WO2023169891A1 (fr) | 2022-03-07 | 2023-03-01 | Module d'antenne pour véhicule |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4460871A1 true EP4460871A1 (fr) | 2024-11-13 |
| EP4460871C0 EP4460871C0 (fr) | 2025-08-13 |
| EP4460871B1 EP4460871B1 (fr) | 2025-08-13 |
Family
ID=82196729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23707734.2A Active EP4460871B1 (fr) | 2022-03-07 | 2023-03-01 | Module d'antenne pour véhicule |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US12327912B2 (fr) |
| EP (1) | EP4460871B1 (fr) |
| CN (1) | CN118830138A (fr) |
| DE (1) | DE202023002964U1 (fr) |
| ES (1) | ES3049383T3 (fr) |
| FR (1) | FR3133274B1 (fr) |
| HU (1) | HUE073615T2 (fr) |
| WO (1) | WO2023169891A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20260045682A1 (en) * | 2024-08-08 | 2026-02-12 | Ford Global Technologies, Llc | Vehicle antenna assembly with exposed ground plane |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3443614B1 (fr) * | 2016-04-12 | 2021-04-07 | Valeo Comfort and Driving Assistance | Module d'antenne pour véhicule automobile comprenant une feuille métallique |
| JP6881349B2 (ja) * | 2018-02-26 | 2021-06-02 | 株式会社デンソー | 車両用アンテナ装置 |
| DE202020100452U1 (de) * | 2019-01-31 | 2020-03-24 | Ask Industries Societa' Per Azioni | Antennenmodul für ein Fahrzeug mit gedrucktem Schaltungssystem |
| JP7356000B2 (ja) * | 2019-08-14 | 2023-10-04 | ミツミ電機株式会社 | アンテナ装置 |
-
2022
- 2022-03-07 FR FR2201959A patent/FR3133274B1/fr active Active
-
2023
- 2023-03-01 HU HUE23707734A patent/HUE073615T2/hu unknown
- 2023-03-01 WO PCT/EP2023/055103 patent/WO2023169891A1/fr not_active Ceased
- 2023-03-01 CN CN202380025956.4A patent/CN118830138A/zh active Pending
- 2023-03-01 EP EP23707734.2A patent/EP4460871B1/fr active Active
- 2023-03-01 US US18/836,783 patent/US12327912B2/en active Active
- 2023-03-01 ES ES23707734T patent/ES3049383T3/es active Active
- 2023-03-01 DE DE202023002964.3U patent/DE202023002964U1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US12327912B2 (en) | 2025-06-10 |
| EP4460871C0 (fr) | 2025-08-13 |
| EP4460871B1 (fr) | 2025-08-13 |
| DE202023002964U1 (de) | 2025-03-27 |
| FR3133274A1 (fr) | 2023-09-08 |
| HUE073615T2 (hu) | 2026-01-28 |
| ES3049383T3 (en) | 2025-12-16 |
| FR3133274B1 (fr) | 2024-01-19 |
| WO2023169891A1 (fr) | 2023-09-14 |
| US20250149780A1 (en) | 2025-05-08 |
| CN118830138A (zh) | 2024-10-22 |
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