WO2017186581A1 - Antenna device and apparatus including the antenna device - Google Patents

Antenna device and apparatus including the antenna device Download PDF

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Publication number
WO2017186581A1
WO2017186581A1 PCT/EP2017/059438 EP2017059438W WO2017186581A1 WO 2017186581 A1 WO2017186581 A1 WO 2017186581A1 EP 2017059438 W EP2017059438 W EP 2017059438W WO 2017186581 A1 WO2017186581 A1 WO 2017186581A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
printed circuit
circuit board
antenna device
metal
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.)
Ceased
Application number
PCT/EP2017/059438
Other languages
French (fr)
Inventor
Dominique Lo Hine Tong
Laurent GLAIS
Jean-Marc Le Foulgoc
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thomson Licensing SAS
Original Assignee
Thomson Licensing SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thomson Licensing SAS filed Critical Thomson Licensing SAS
Publication of WO2017186581A1 publication Critical patent/WO2017186581A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • 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
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises

Definitions

  • the disclosure relates generally to the field of antenna devices or antenna structures.
  • Multimedia devices now comprise one or several antennas for exchanging data signals with other multimedia devices.
  • Such multimedia devices may for example comprise one or several WiFi antennas and one or several Bluetooth antennas. These antennas are connected to dedicated printed circuit boards for processing the data signals. All these components are generally to be integrated in a small volume.
  • the multimedia device is generally completed with metal parts that enable to mitigate the met electromagnetic compatibility (EMC), electromagnetic interferences (EMI), and electrostatic discharge (ESD) issues and to comply with regulation specifications. All the printed circuit boards (PCBs) have to be interconnected together using dedicated connectors, like PCIe connectors.
  • the PCBs have also to be interconnected to the additional metal parts which can both serve as heat spreaders and as a global grounding reference.
  • an antenna both acting as a radiating element and as an interconnecting element.
  • a first aspect of the disclosure relates to an antenna device comprising a metal inverted-
  • the metal inverted-F antenna to be mounted onto a printed circuit board, said metal inverted-F antenna being arranged for radiating radiofrequency signals in a predetermined frequency band and said printed circuit board including a feeding port and a ground port.
  • the metal inverted-F antenna is further arranged for interconnecting the ground port and the ground plane of the printed circuit board to a metal plate separate from the printed circuit board and a radiating element of said metal inverted-F antenna does not overlap a ground plane of the printed circuit board.
  • the metal inverted-F antenna plays both the role of an antenna and the role of an interconnecting element between a printed circuit board and a metal plate. It enables the cost and size of the device to be reduced.
  • the metal inverted-F antenna further comprises a feeding element and a ground element arranged together to have an inverted-F shape and a connecting element having a first end both connected to the ground element and the radiating element and a second end to be connected to the metal plate.
  • the connecting element comprises a first portion in line with the radiating element.
  • the connecting element comprises a second portion for connecting said first portion to the metal plate.
  • first and second portions of the connecting element are perpendicular.
  • the ground element, the feeding element, the radiating element and the connecting element are coplanar.
  • the ground element, the feeding element, the radiating element and the connecting element are not coplanar.
  • the inverted-F antenna resonates at a resonant frequency in the predetermined frequency band and wherein the total length of the ground element and the radiating element is substantially equal to ⁇ /4, where ⁇ designates the wavelength associated to said resonant frequency.
  • the length of the connecting element is comprised between ⁇ 8 and ⁇ 4.
  • Another aspect of the disclosure concerns an apparatus comprising the antenna device defined hereinabove.
  • the disclosure also relates to an apparatus comprising:
  • the printed circuit board and the metal plate are not coplanar.
  • the printed circuit board and the metal plate are substantially perpendicular.
  • the metal plate is a grounding reference plate. In a particular embodiment, the metal plate is a heat spreading element.
  • Embodiments of the disclosure can help to reduce the cost of a multimedia device comprising at least one antenna, one printed circuit board and one separate metal plate(s) to be connected to the printed circuit board, and to reduce the number of components of such multimedia device.
  • FIG. 1 is a perspective view of an antenna device according to an embodiment of the invention
  • FIG. 2 is a perspective view of an apparatus according to an embodiment of the invention comprising a printed circuit board, a metal plate and the antenna device of FIG. 1;
  • FIG. 3 is a top view of the apparatus of FIG. 2;
  • FIG. 4 is a side view of the apparatus of FIG. 2;
  • FIG. 5 is a diagram illustrating the return loss of the antenna device of FIG. 1;
  • FIG. 6 is a diagram illustrating the peak gain response of the antenna device of FIG. 1;
  • FIG. 7 is a diagram illustrating the efficiency response of the antenna device of FIG. 1;
  • FIG. 8 is a 3D diagram illustrating the radiation pattern of the antenna device of FIG. 1 in the apparatus of FIG. 2.
  • FIG. 1 is a perspective view of an antenna device according to an embodiment of the disclosure.
  • the antenna device is a kind of pseudo inverted-F antenna 1 with two ground pins, one ground pin to be connected to a ground plane of a printed circuit board and one ground pin to be connected to a metal plate serving as a grounding reference and/or as heat spreading element.
  • the antenna has been designed to work in the Bluetooth band.
  • the pseudo inverted-F antenna 1 comprises a plurality of metal strips, SI to S6, forming a radiating element (or main radiating element) 10, a feeding element 11 and a ground element 12 arranged together to have an inverted-F shape and a connecting element 13 to be connected to the metal plate.
  • the antenna also comprises one feeding pin PI, two ground pins P2 and P3 and one open-circuit pin P4.
  • the radiating element 10 is formed by the two metal strips S2 and S4 which are aligned.
  • the feeding element 11 is formed by the metal strip SI which is substantially perpendicular to the metal strips S2 and S4 and the ground element 12 is formed by the metal strip S3 which is substantially perpendicular to the metal strips S2 and S4 and parallel to the metal strip S 1.
  • the feeding element 11 comprises the feeding pin PI at its free end.
  • the ground element 12 comprises the feeding pin P2 at its free end.
  • the antenna 1 comprises a connecting element 13 formed by the metal strips S5 and S6.
  • the metal strip S5, which constitutes a first portion of the connecting element 13, is connected to the strip S3 of the ground element and is in line with the strips S2 and S4 of the radiating element.
  • the metal strip S6, which constitutes a second portion of the connecting element 13, is connected to the free end of the strip S5.
  • the strips S5 and S6 are perpendicular.
  • the dimensions (size and length) of the strips SI to S6 are defined to match the required impedance and the required frequency band. Examples of dimensions are given in the following table for an antenna device working in the Bluetooth or Wi-Fi 2.4 GHz band:
  • the length of the connecting element 13 is substantially equal to ⁇ /8 but it can be comprised between ⁇ /8 and ⁇ 4.
  • This antenna device has been designed to be integrated in an apparatus comprising a printed circuit board 2 and a metal plate 3 as shown in FIGs. 2 to 4.
  • the printed circuit board 2 is adapted to process the signals received by the antenna device 1 or to generate the signals to be emitted though the antenna device 1.
  • the printed circuit board 2 and the metal plate 3 are substantially perpendicular.
  • the antenna device 1 serves both as an antenna for the printed circuit board 2 and as interconnecting element for connecting the ground port of the printed circuit board 2 to the metal plate 3.
  • the metal plate 3 can serve as a grounding reference and as a heat spreader for the overall electronic device.
  • the feeding pin PI and the ground pin P2 of the antenna device are connected to a feeding port and a ground port of the printed circuit board 2.
  • the ground pin P3 of the antenna device is connected to the metal plate 3.
  • the printed circuit board 2 is positioned lower than the upper edge of the metal plate.
  • the antenna device thus comprises bended parts to compensate this difference of levels.
  • the ends of the ground element 12 and the feeding element 11 are bended to form the ground pin P2 and the feeding PI, respectively.
  • the plane of the printed circuit board 2 is horizontal, these end portions and the strip S6 are also horizontal while the other strips SI to S5 are positioned in one or more inclined planes.
  • the strips SI and S3 do not belong to the same inclined plane. These strips have different angles compared to the PCB plane. This is a way of tuning with respect to mechanical, room or impedance constraints.
  • the different strips of antenna device may be coplanar or not with respect to mechanical, room or impedance constraints.
  • Somme small bended portions can be required for facilitating the connection of the pins of the antenna device to the ports of the PCB and to the metal plate.
  • the antenna device can be fabricated using common stamping process. Several ways are possible to interconnect the pins of the antenna device 1 to the PCB 2 and to the metal plate 3.
  • the feeding pin PI and the ground pin P3 connected to the PCB 2 can be soldered, screwed or by using a kind of spring pin approach to avoid soldering process.
  • the ground pin P3 can be connected to the metal plate 3 by insertion into a slot made on top of the metal plate, by screwing or by using a spring system.
  • the radiating element (strips S2 and S4) of the antenna device does not overlap the ground plane of the PCB 2. It enables to reduce the directivity of the antenna and make the impedance matching easier to realize.
  • the antenna device 1 connected to the PCB 2 and the metal plate 3 as illustrated by FIGs. 2 to 4 has been simulated using the HFSSTM 3D electromagnetic tool with the dimensions of the antenna device as defined in the previous Table 1.
  • the simulation results are illustrated by FIGs. 5 to 8:
  • FIG. 5 demonstrates that the antenna device 1 is well matched in the Bluetooth band [2.4-2.5GHz] with a return loss level lower than -lOdB in the worst case.
  • FIG. 6 demonstrates that the peak gain is around 6-7dBi in the Bluetooth band.
  • FIG. 7 demonstrates s that the efficiency is higher than 80% in the Bluetooth band.
  • FIG. 8 shows that the antenna device radiates properly in the front side of the apparatus.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)

Abstract

The present disclosure relates to an antenna device (1) including a metal inverted-F antenna to be mounted onto a printed circuit board. The metal inverted-F antenna is arranged for radiating radiofrequency signals in a predetermined frequency band and the printed circuit board includes a feeding port and a ground port. The metal inverted-F antenna (1) is further arranged for interconnecting the ground port of the printed circuit board to a metal plate separate from the printed circuit board. A radiating element (10) of the metal inverted-F antenna (1) does not overlap a ground plane of the printed circuit board (2). Thus, the metal inverted-F antenna acts both as a radiating element and as an interconnecting element. It plays both the role of an antenna and the role of an interconnecting element between a printed circuit board and a metal plate.

Description

ANTENNA DEVICE AND
APPARATUS INCLUDING THE ANTENNA DEVICE
1. Technical Field
The disclosure relates generally to the field of antenna devices or antenna structures.
2. Background Art
Lots of multimedia devices now comprise one or several antennas for exchanging data signals with other multimedia devices. Such multimedia devices may for example comprise one or several WiFi antennas and one or several Bluetooth antennas. These antennas are connected to dedicated printed circuit boards for processing the data signals. All these components are generally to be integrated in a small volume. The multimedia device is generally completed with metal parts that enable to mitigate the met electromagnetic compatibility (EMC), electromagnetic interferences (EMI), and electrostatic discharge (ESD) issues and to comply with regulation specifications. All the printed circuit boards (PCBs) have to be interconnected together using dedicated connectors, like PCIe connectors. The PCBs have also to be interconnected to the additional metal parts which can both serve as heat spreaders and as a global grounding reference.
All these interconnections require dedicated connectors or clips and contribute to increase the product cost.
3. Summary of Invention
According to embodiments of the disclosure, it is proposed to create an antenna both acting as a radiating element and as an interconnecting element.
A first aspect of the disclosure relates to an antenna device comprising a metal inverted-
F antenna to be mounted onto a printed circuit board, said metal inverted-F antenna being arranged for radiating radiofrequency signals in a predetermined frequency band and said printed circuit board including a feeding port and a ground port. According to the disclosure, the metal inverted-F antenna is further arranged for interconnecting the ground port and the ground plane of the printed circuit board to a metal plate separate from the printed circuit board and a radiating element of said metal inverted-F antenna does not overlap a ground plane of the printed circuit board. Thus, the metal inverted-F antenna plays both the role of an antenna and the role of an interconnecting element between a printed circuit board and a metal plate. It enables the cost and size of the device to be reduced.
In a particular embodiment, the metal inverted-F antenna further comprises a feeding element and a ground element arranged together to have an inverted-F shape and a connecting element having a first end both connected to the ground element and the radiating element and a second end to be connected to the metal plate.
In a particular embodiment, the connecting element comprises a first portion in line with the radiating element.
In a particular embodiment, the connecting element comprises a second portion for connecting said first portion to the metal plate.
In a particular embodiment, the first and second portions of the connecting element are perpendicular.
In a particular embodiment, the ground element, the feeding element, the radiating element and the connecting element are coplanar.
In another particular embodiment, the ground element, the feeding element, the radiating element and the connecting element are not coplanar.
In a particular embodiment, the inverted-F antenna resonates at a resonant frequency in the predetermined frequency band and wherein the total length of the ground element and the radiating element is substantially equal to λ/4, where λ designates the wavelength associated to said resonant frequency.
In a particular embodiment, the length of the connecting element is comprised between λ 8 and λ 4.
Another aspect of the disclosure concerns an apparatus comprising the antenna device defined hereinabove. Thus, the disclosure also relates to an apparatus comprising:
- a printed circuit board comprising a ground port,
- a separate metal plate,
- a metal inverted-F antenna mounted onto the printed circuit board as defined in the antenna device defined hereinabove.
In a particular embodiment, the printed circuit board and the metal plate are not coplanar.
In a particular embodiment, the printed circuit board and the metal plate are substantially perpendicular.
In a particular embodiment, the metal plate is a grounding reference plate. In a particular embodiment, the metal plate is a heat spreading element.
Embodiments of the disclosure can help to reduce the cost of a multimedia device comprising at least one antenna, one printed circuit board and one separate metal plate(s) to be connected to the printed circuit board, and to reduce the number of components of such multimedia device.
While not explicitly described, the present embodiments may be employed in any combination or sub-combination.
4. Brief description of the drawings
The disclosure may be better understood with reference to the following description and drawings, given by way of example and not limiting the scope of protection, and in which:
FIG. 1 is a perspective view of an antenna device according to an embodiment of the invention;
FIG. 2 is a perspective view of an apparatus according to an embodiment of the invention comprising a printed circuit board, a metal plate and the antenna device of FIG. 1;
FIG. 3 is a top view of the apparatus of FIG. 2; FIG. 4 is a side view of the apparatus of FIG. 2;
FIG. 5 is a diagram illustrating the return loss of the antenna device of FIG. 1;
FIG. 6 is a diagram illustrating the peak gain response of the antenna device of FIG. 1;
FIG. 7 is a diagram illustrating the efficiency response of the antenna device of FIG. 1; and
FIG. 8 is a 3D diagram illustrating the radiation pattern of the antenna device of FIG. 1 in the apparatus of FIG. 2.
5. Description of a preferred embodiment
FIG. 1 is a perspective view of an antenna device according to an embodiment of the disclosure. The antenna device is a kind of pseudo inverted-F antenna 1 with two ground pins, one ground pin to be connected to a ground plane of a printed circuit board and one ground pin to be connected to a metal plate serving as a grounding reference and/or as heat spreading element. The antenna has been designed to work in the Bluetooth band.
The pseudo inverted-F antenna 1 comprises a plurality of metal strips, SI to S6, forming a radiating element (or main radiating element) 10, a feeding element 11 and a ground element 12 arranged together to have an inverted-F shape and a connecting element 13 to be connected to the metal plate. The antenna also comprises one feeding pin PI, two ground pins P2 and P3 and one open-circuit pin P4.
Basically, the radiating element 10 is formed by the two metal strips S2 and S4 which are aligned. The feeding element 11 is formed by the metal strip SI which is substantially perpendicular to the metal strips S2 and S4 and the ground element 12 is formed by the metal strip S3 which is substantially perpendicular to the metal strips S2 and S4 and parallel to the metal strip S 1.
The feeding element 11 comprises the feeding pin PI at its free end. Similarly, the ground element 12 comprises the feeding pin P2 at its free end.
According to this embodiment of the disclosure, the antenna 1 comprises a connecting element 13 formed by the metal strips S5 and S6. The metal strip S5, which constitutes a first portion of the connecting element 13, is connected to the strip S3 of the ground element and is in line with the strips S2 and S4 of the radiating element. The metal strip S6, which constitutes a second portion of the connecting element 13, is connected to the free end of the strip S5. In the present embodiment, the strips S5 and S6 are perpendicular.
The dimensions (size and length) of the strips SI to S6 are defined to match the required impedance and the required frequency band. Examples of dimensions are given in the following table for an antenna device working in the Bluetooth or Wi-Fi 2.4 GHz band:
Figure imgf000006_0001
Table 1
These dimensions are defined such that the total length of the strips S2, S3 and S4 forming the ground element 12 and the radiating element 10 is substantially equal to λ/4, where λ designates the wavelength associated to the resonant frequency of the antenna. 9. The length of the connecting element 13 is substantially equal to λ/8 but it can be comprised between λ/8 and λ 4.
This antenna device has been designed to be integrated in an apparatus comprising a printed circuit board 2 and a metal plate 3 as shown in FIGs. 2 to 4. The printed circuit board 2 is adapted to process the signals received by the antenna device 1 or to generate the signals to be emitted though the antenna device 1.
In these drawings, the printed circuit board 2 and the metal plate 3 are substantially perpendicular. The antenna device 1 serves both as an antenna for the printed circuit board 2 and as interconnecting element for connecting the ground port of the printed circuit board 2 to the metal plate 3.
The metal plate 3 can serve as a grounding reference and as a heat spreader for the overall electronic device.
The feeding pin PI and the ground pin P2 of the antenna device are connected to a feeding port and a ground port of the printed circuit board 2. The ground pin P3 of the antenna device is connected to the metal plate 3.
As can be seen in Figs. 2 to 4, the printed circuit board 2 is positioned lower than the upper edge of the metal plate. The antenna device thus comprises bended parts to compensate this difference of levels. The ends of the ground element 12 and the feeding element 11 are bended to form the ground pin P2 and the feeding PI, respectively. Assuming, that the plane of the printed circuit board 2 is horizontal, these end portions and the strip S6 are also horizontal while the other strips SI to S5 are positioned in one or more inclined planes.
As can be seen in Fig. 4, the strips SI and S3 do not belong to the same inclined plane. These strips have different angles compared to the PCB plane. This is a way of tuning with respect to mechanical, room or impedance constraints.
Therefore, the different strips of antenna device may be coplanar or not with respect to mechanical, room or impedance constraints. Somme small bended portions can be required for facilitating the connection of the pins of the antenna device to the ports of the PCB and to the metal plate.
The antenna device can be fabricated using common stamping process. Several ways are possible to interconnect the pins of the antenna device 1 to the PCB 2 and to the metal plate 3.
The feeding pin PI and the ground pin P3 connected to the PCB 2 can be soldered, screwed or by using a kind of spring pin approach to avoid soldering process.
The ground pin P3 can be connected to the metal plate 3 by insertion into a slot made on top of the metal plate, by screwing or by using a spring system.
In FIGs. 2 to 4, the radiating element (strips S2 and S4) of the antenna device does not overlap the ground plane of the PCB 2. It enables to reduce the directivity of the antenna and make the impedance matching easier to realize.
The antenna device 1 connected to the PCB 2 and the metal plate 3 as illustrated by FIGs. 2 to 4 has been simulated using the HFSS™ 3D electromagnetic tool with the dimensions of the antenna device as defined in the previous Table 1. The simulation results are illustrated by FIGs. 5 to 8:
FIG. 5 demonstrates that the antenna device 1 is well matched in the Bluetooth band [2.4-2.5GHz] with a return loss level lower than -lOdB in the worst case.
FIG. 6 demonstrates that the peak gain is around 6-7dBi in the Bluetooth band.
FIG. 7 demonstrates s that the efficiency is higher than 80% in the Bluetooth band.
FIG. 8 shows that the antenna device radiates properly in the front side of the apparatus.
Although a preferred embodiment of the present disclosure has been illustrated in the accompanying Drawings and described in the foregoing Detailed Description, it should be understood that the present disclosure is not limited to the disclosed embodiment, but is capable of numerous rearrangements, modifications and substitutions without departing from the invention as set forth and defined by the following claims.

Claims

1. Antenna device (1) comprising a metal inverted-F antenna (1) to be mounted onto a printed circuit board (2), said metal inverted-F antenna being arranged for radiating radiofrequency signals in a predetermined frequency band and said printed circuit board including a feeding port and a ground port,
wherein said metal inverted-F antenna (1) is further arranged for interconnecting the ground port of the printed circuit board (2) to a metal plate (3) separate from the printed circuit board and a radiating element (10) of said metal inverted-F antenna (1) does not overlap a ground plane of the printed circuit board (2).
2. Antenna device according to claim 1, wherein the metal inverted-F antenna (1) further comprises a feeding element (11) and a ground element (12) arranged together to have an inverted-F shape and a connecting element (13) having a first end both connected to the ground element and the radiating element and a second end to be connected to the metal plate.
3. Antenna device according to claim 2, wherein the connecting element (13) comprises a first portion (S5) in line with the radiating element.
4. Antenna device according to claim 3, wherein the connecting element (13) comprises a second portion (S6) for connecting said first portion to the metal plate.
5. Antenna device according to claim 4, wherein the first and second portions (S5, S6) of the connecting element are perpendicular.
6. Antenna device according to any one of claims 2 to 5 wherein the ground element (12), the feeding element (11), the radiating element (10) and the connecting element (13) are coplanar.
7. Antenna device according to any one of claims 2 to 5 wherein the ground element (12), the feeding element (11), the radiating element (10) and the connecting element (13) are not coplanar.
8. Antenna device according to any one of claims 2 to 7 wherein the inverted-F antenna resonates at a resonant frequency in said predetermined frequency band and wherein the total length of the ground element (12) and the radiating element (10) is substantially equal to λ/4, where λ designates the wavelength associated to said resonant frequency.
9. Antenna device according to claim 8 wherein the length of the connecting element (13) is comprised between λ/8 and λ/4.
10. Apparatus comprising:
- a printed circuit board (2) comprising a ground port,
- a separate metal plate (3),
- a metal inverted-F antenna (1) according to any preceding claim mounted onto the printed circuit board.
11. Apparatus according to Claim 10, wherein the printed circuit board (2) and the metal plate (3) are not coplanar.
12. Apparatus according to Claim 11, wherein the printed circuit board and the metal plate are substantially perpendicular.
13. Apparatus according to any one of Claims 10 to 12, wherein the metal plate (3) is a grounding reference plate.
14. Apparatus according to any one of Claims 10 to 13, wherein the metal plate (3) is a heat spreading element.
PCT/EP2017/059438 2016-04-25 2017-04-20 Antenna device and apparatus including the antenna device Ceased WO2017186581A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16305483.6 2016-04-25
EP16305483.6A EP3240105A1 (en) 2016-04-25 2016-04-25 Apparatus including the antenna device

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WO2019182492A1 (en) 2018-03-21 2019-09-26 Telefonaktiebolaget Lm Ericsson (Publ) Folded antenna

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120064843A1 (en) * 2010-09-10 2012-03-15 Changil Kim Data communication device
US20120176278A1 (en) * 2011-01-11 2012-07-12 Merz Nicholas G L Antenna structures with electrical connections to device housing members
US20140347226A1 (en) * 2013-05-24 2014-11-27 Microsoft Corporation Back face antenna for a computing device case
US20160072189A1 (en) * 2014-09-05 2016-03-10 Thomson Licensing Antenna assembly and electronic device comprising said antenna assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120064843A1 (en) * 2010-09-10 2012-03-15 Changil Kim Data communication device
US20120176278A1 (en) * 2011-01-11 2012-07-12 Merz Nicholas G L Antenna structures with electrical connections to device housing members
US20140347226A1 (en) * 2013-05-24 2014-11-27 Microsoft Corporation Back face antenna for a computing device case
US20160072189A1 (en) * 2014-09-05 2016-03-10 Thomson Licensing Antenna assembly and electronic device comprising said antenna assembly

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