EP2993729A1 - Ensemble d'antenne et dispositif électronique comprenant ledit ensemble d'antenne - Google Patents

Ensemble d'antenne et dispositif électronique comprenant ledit ensemble d'antenne Download PDF

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Publication number
EP2993729A1
EP2993729A1 EP14306372.5A EP14306372A EP2993729A1 EP 2993729 A1 EP2993729 A1 EP 2993729A1 EP 14306372 A EP14306372 A EP 14306372A EP 2993729 A1 EP2993729 A1 EP 2993729A1
Authority
EP
European Patent Office
Prior art keywords
ground
antenna assembly
radiating
circuit board
transmission part
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.)
Withdrawn
Application number
EP14306372.5A
Other languages
German (de)
English (en)
Inventor
Dominique Lo Hine Tong
Philippe Minard
Pierre-Marie Morin
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
Priority to EP14306372.5A priority Critical patent/EP2993729A1/fr
Priority to AU2015215891A priority patent/AU2015215891A1/en
Priority to EP15182093.3A priority patent/EP2993731A1/fr
Priority to CN201510541292.4A priority patent/CN105406166A/zh
Priority to KR1020150124212A priority patent/KR20160029688A/ko
Priority to US14/845,630 priority patent/US20160072189A1/en
Priority to JP2015174318A priority patent/JP2016059043A/ja
Publication of EP2993729A1 publication Critical patent/EP2993729A1/fr
Priority to HK16110733.3A priority patent/HK1222477A1/zh
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields
    • 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

Definitions

  • the present invention relates to an antenna assembly and a wireless electronic device comprising said antenna assembly.
  • Electronic wireless devices including mobile telephones, tablets set-top boxes and gateway devices contain an increasing number of electronic components in an increasingly reduced space.
  • Figure 10 shows an example of a configuration of electronic components in a set-top box. As illustrated, the front side of the circuit board is fully occupied by many electronic components, such as a display device 1, an infra-red sensor 2, a group of LEDS 3, a group of control push-buttons 4, a SD-card reader 5, and USB connectors 6. All of these electronic components are aligned along the front edge of the circuit board due to their functionality and usage.
  • An important functional element of such wireless devices is the antenna for transmission and reception of radio frequency waves.
  • the optimum place for positioning an antenna is at the front of the wireless device.
  • the presence of the many other electronic components at the front of a wireless device creates obstacles to the radiation of radio waves and impairs the performance of the antenna.
  • large areas of ground clearance need to be provided on the circuit board to provide appropriate grounding of the antenna. Because of the presence of the other electronic components it is becoming increasingly difficult to find the required space for ground clearance of antennas at the front side of the circuit board.
  • a first aspect of the invention provides an antenna assembly mountable on a circuit board, the antenna assembly comprising: a radiating part; a transmission part for feeding the radiating part, the transmission part comprising a signal feed element and a ground element connectable to the circuit board; wherein the ground element comprises an extension ground element, folded away from the ground element such that it extends over the signal feed element and the ground element to form a ground plane spaced apart from the signal feed element and connectable to a ground connection of the circuit board.
  • the signal feed element and the ground element extend parallel to one another.
  • the signal feed element operates in a microstrip mode.
  • the signal feed element is fed by a coplanar waveguide with ground.
  • extension ground element is folded to provide a ground plane on each side of the signal feed element.
  • a transmission line interface is provided for connecting the signal feed element to the circuit board , wherein an aperture is defined in the extension ground element at the part of the extension ground element facing towards the transmission line interface.
  • the radiating element comprises an Inverted F Antenna.
  • the radiating part comprises a ground element extending from the ground element of the transmission part and a signal element extending from the signal feed element of the transmission part and a radiating element extending perpendicularly to the ground element and the signal element.
  • the radiating element is folded along its longitudinal axis.
  • the radiating element comprises a monopole type antenna
  • the extension ground element is folded along a further axis such that it extends parallel to the ground element and the signal element of the radiating element.
  • the ground extension element is located on an opposite side of the strip element and the ground element of the transmission part, to the radiating element.
  • the ground extension element is located on the same side of the strip element and the ground element of the transmission part, as the radiating element.
  • a second aspect of the invention provides an electronic communication device comprising a circuit board and an antenna assembly according to any preceding claim mounted on the circuit board, the antenna assembly being mounted such that the a signal feed element and a ground element of the transmission part extend away from the surface of the circuit board.
  • the circuit board is provided with at least one electronic component at the front of the circuit board and the radiating part is arranged to extend from the transmission part beyond the electronic component to the front of the electronic component and to face outwards from the electronic communication device, the transmission part being disposed behind the electronic component.
  • the electronic comprises at least one of a display board, an LED, an infra-red sensor, a control unit, and a USB connector.
  • the circuit board comprises a clearance area devoid of electronic components, the clearance area being disposed behind the antenna assembly.
  • the electronic communication device is a gateway device or a set top box.
  • FIG. 1 is a schematic diagram of an antenna assembly according to a first embodiment of the invention.
  • the antenna assembly 10 comprises a radiating part 100 for radiating radio frequency signals and a transmission part 200 for feeding signals from a feed line of a printed circuit board (PCB) on which the antenna assembly 10 is mounted to the radiating part 100.
  • PCB printed circuit board
  • the transmission part 200 comprises a signal strip 210 for feeding signals from the PCB to the radiating part 100 and a ground strip 220 connectable to a ground connection of the PCB.
  • the signal strip 210 and the ground strip 220 are arranged to extend parallel to one another.
  • the ground strip 220 is extended by an extension ground element 230.
  • the extension ground element is folded over by 180° to extend over the signal strip 210 and the ground strip 220 forming a ground plane 230 facing towards and spaced apart from the signal element 210.
  • the extension ground element 230 is connectable to a ground connection of the PCB. In this configuration the signal strip 210 is in a microstrip mode with a finite ground plane provided by ground plane 230.
  • An aperture 226 is defined in the ground plane 230 at the part of the ground plane 230 facing the interface between the signal strip 210 and the PCB. This enables electrical contact between the ground plane 230 and the feeding line of the PCB to be avoided.
  • the signal strip 210 is provided with a pin 211 for connecting to a corresponding connection on the signal feeding line of the PCB.
  • the ground strip is provided with a pin 221 for connecting to a corresponding connection on the ground plane of the PCB, and the extension ground element 230 is provided with a pin 231 for connecting to a corresponding connection on the ground plane of the PCB.
  • the radiating part 100 comprises a signal strip 110 extending from the signal strip 210 of the transmitting part, and a ground strip 120 extending from the ground strip 220 of the transmitting part.
  • the signal strip 110 and the ground strip 120 are bent at an angle of approximately 90° to the signal strip 210 and the ground strip of the transmitting part.
  • a radiating strip 140 connects the ends of the signal strip 110 and the ground strip 120 to form an IFA type antenna.
  • the radiating strip 140 is folded along its longitudinal axis by an angle of approximately 90°. Such a configuration enables the antenna input impedance matching to be optimized.
  • Figure 2 schematically illustrates the antenna assembly of Figure 1 mounted on a PCB board 300.
  • the signal strip 210 and the ground strip 220 of the transmission part 200 of the antenna assembly 10 extend from the surface of the PCB board.
  • the antenna part 100 of the antenna assembly 200 is thereby raised a height above the surface of the PCB board, the height being dependent upon the length of the signal strip 210 and the ground strip 220 of the transmission part 200.
  • the clearing height enables the antenna part 100 to be disposed above an electronic component fitted on the PCB board 300 in front of the transmission part 200 which would otherwise act as an obstacle to radiation of the radiating strip 140.
  • the extension of the ground signal strip 110 and the ground strip 120 at a right angle from the signal strip 210 and the ground strip 220 of the transmission part 200 enables the radiating strip 140 to extend beyond the electronic component thereby providing an obstacle free zone in front of the radiating strip 141.
  • FIG 3A schematically illustrates the surface of the PCB 300 where the antenna assembly 10 is mounted
  • Figure 3B schematically illustrates the antenna assembly 10 mounted on the PCB board
  • the PCB 300 comprises a feeding port 310 for feeding the signal, a feed line 320 for connecting the feeding port 310 to the signal feed connector 330 for receiving the signal feed pin 211 of the transmission part 200.
  • a first ground pin connector 340 is provided for connecting with the ground pin 221 of the ground strip 220
  • a second ground pin connector 345 is provided for connecting with the ground pin 231 of the ground plane 230.
  • the first ground pin connector 340 and the second ground pin connector 345 are connected to a ground plane of the PCB 300.
  • Impedance matching components 325 are provided on the feed line 320.
  • a clearance area 350 devoid of connections for mounting electronic components is provided around the signal feed connector 330.
  • Aperture 226 in the ground plane 230 is aligned with the signal feed connector 330.
  • FIGs 4A and 4B schematically illustrate the PCB board 300 of Figure 2 fitted with a display panel 410 at the front side of the PCB board 300.
  • the antenna assembly 10 is arranged with respect to the display panel 410 such that the transmission part 200 is disposed behind the display panel 410 and the antenna part 100 is disposed in front of the display panel 410.
  • the clearance height provided by the length of the signal feed strip 210 and the ground strip 220 of the transmission part 200 enable the antenna part 100 of the antenna assembly 10 be disposed over the display panel 410, and the orientation of the signal strip 110 and the ground strip 210 extending perpendicularly to the transmission part 100 enable the radiating element 140 of the antenna part 10 to be disposed in front of the display panel 410.
  • FIG. 5 is a schematic diagram of an antenna assembly 50 according to a second embodiment of the invention.
  • the antenna assembly 50 comprises a radiating part 5100 for radiating radio frequency signals and a transmission part 5200 for feeding signals from a feed line of a printed circuit board (PCB) on which the antenna assembly 50 is mounted to the radiating part 5100.
  • the antenna assembly 50 of the second embodiment differs to the antenna assembly 10 of the first embodiment in that the ground plane 5230 of the transmission part is located on the same side of the signal feed strip 5210 and the ground strip 5220 as the radiating element 5140 of the radiating part 5100.
  • FIG. 6 is a schematic diagram of an antenna assembly 60 according to a third embodiment of the invention.
  • the antenna assembly 60 comprises a radiating part 6100 for radiating radio frequency signals and a transmission part 6200 for feeding signals from a feed line of a printed circuit board (PCB) on which the antenna assembly 60 is mounted to the radiating part 6100.
  • the antenna assembly 60 of the third embodiment differs to the antenna assembly 50 of the second embodiment in that part of the ground plane 6230 of the transmission part 6200 is bent to extend away from the main part of the ground plane 6230 and parallel to the signal strip 6110 and ground strip 6120 of the radiating part 6100 of the antenna assembly 60 located is bent the radiating element 6140 of the radiating part 6100.
  • FIG. 7 is a schematic diagram of an antenna assembly 70 according to a fourth embodiment of the invention.
  • the antenna assembly 70 comprises a radiating part 7100 for radiating radio frequency signals and a transmission part 7200 for feeding signals from a feed line of a printed circuit board (PCB) on which the antenna assembly 70 is mounted to the radiating part 7100.
  • the antenna assembly 70 of the fourth embodiment differs to the antenna assembly 10 of the first embodiment in that the ground plane 7230 of the transmission part 7200 is provided with two ground connector pins 7231 and 7232, and in that the signal feed strep 7210 is wider, and may be slightly bent. This enables a more rigid assembly to be provided.
  • FIGS. 8A and 8B are schematic diagrams of an antenna assembly 80 according to a fifth embodiment of the invention.
  • the antenna assembly is fed by a coplanar waveguide with ground (CPWG).
  • the antenna assembly 80 comprises a radiating part 8100 for radiating radio frequency signals and a transmission part 8200 for feeding signals from a CPWG to the radiating part 8100 by a feed line strip 8210.
  • the ground plane 8230 of the transmission part 8200 is provided on each side of the feed line strip 8210.
  • the ground plane is provided with four connections 812 for connection to a ground of the PCB is folded twice to form a ground plane 8230 facing towards and spaced apart from the signal element 8210 and a ground plane 8230 on each side of the feed line strip 8210.
  • the radiating part 8100 comprises a signal strip 8110 extending from the signal strip 8210 of the transmitting part, and a ground strip 8120 extending from the ground plane 8230 of the transmitting part.
  • the signal strip 8110 and the ground strip 8120 are bent at an angle of approximately 90° to the feed line strip 8210 and the ground plane 8230 of the transmitting part.
  • a radiating strip 8140 connects the ends of the signal strip 8110 and the ground strip 8120 to form an IFA type antenna.
  • the radiating strip 8140 is folded along its longitudinal axis by an angle of approximately 90°.
  • Figure 9 is a perspective view of an electronic device 900 having a PCB 9300, on which are mounted three antenna assemblies 910, 920 and 930 according to any of the embodiments of the invention.
  • the first antenna assembly 910 is connected to the PCB 9300 behind a display 940 such that the transmission part of the antenna assembly 910 is located behind the display and the radiating element 915 is disposed above and in front of the display 940.
  • the second antenna assembly 920 is connected to the PCB 9300 behind a set of LEDs 945 such that the transmission part of the antenna assembly 920 is located behind the set of LEDs 945 and the radiating element 925 is disposed above and in front of the set of LEDs 945.
  • the third antenna assembly 930 is connected to the PCB 9300 behind a set of push buttons 948 such that the transmission part of the antenna assembly 930 is located behind the set of push buttons 948 and the radiating element 935 is disposed above and in front of the set of push buttons 948 .
  • Embodiments of the invention enable the ground clearance surface area on the PCB to be drastically reduced, freeing more space for the integration of other components. Any obstructions and obstacles placed in the front side of a main board, such as a barrier of LEDS and mechanical push-buttons, a display board or other plastic and metal parts, can be by-passed implementing an antenna assembly according to embodiments of the invention enabling thus an improved radiation performance of the antenna.
  • the antenna assembly according to embodiments of the invention can be manufactured at reduced cost, using common manufacturing technologies, for example by stamping process.
  • an antenna assembly according to embodiments of the invention can be placed not only at the edge of a PCB but towards the inner part of the PCB, close to RF transceiver output, thereby reducing insertion losses by virtue of the transmission line being integrated with the antenna assembly in a single metal part.
  • the integrated transmission line may also serve as an impedance matching line, avoiding the need to provide impedance matching on the main board using printed transmission line or lumped components (inductors, capacitors).

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Support Of Aerials (AREA)
EP14306372.5A 2014-09-05 2014-09-05 Ensemble d'antenne et dispositif électronique comprenant ledit ensemble d'antenne Withdrawn EP2993729A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP14306372.5A EP2993729A1 (fr) 2014-09-05 2014-09-05 Ensemble d'antenne et dispositif électronique comprenant ledit ensemble d'antenne
AU2015215891A AU2015215891A1 (en) 2014-09-05 2015-08-20 Antenna assembly and electronic device comprising said antenna assembly
EP15182093.3A EP2993731A1 (fr) 2014-09-05 2015-08-24 Ensemble d'antenne et dispositif electronique comprenant ledit ensemble d'antenne
CN201510541292.4A CN105406166A (zh) 2014-09-05 2015-08-28 天线组件及包括所述天线组件的电子设备
KR1020150124212A KR20160029688A (ko) 2014-09-05 2015-09-02 안테나 어셈블리 및 안테나 어셈블리를 포함하는 전자 디바이스
US14/845,630 US20160072189A1 (en) 2014-09-05 2015-09-04 Antenna assembly and electronic device comprising said antenna assembly
JP2015174318A JP2016059043A (ja) 2014-09-05 2015-09-04 アンテナ・アセンブリおよびアンテナ・アセンブリを有する電子装置
HK16110733.3A HK1222477A1 (zh) 2014-09-05 2016-09-09 天線組件及包括所述天線組件的電子設備

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14306372.5A EP2993729A1 (fr) 2014-09-05 2014-09-05 Ensemble d'antenne et dispositif électronique comprenant ledit ensemble d'antenne

Publications (1)

Publication Number Publication Date
EP2993729A1 true EP2993729A1 (fr) 2016-03-09

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ID=51619119

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14306372.5A Withdrawn EP2993729A1 (fr) 2014-09-05 2014-09-05 Ensemble d'antenne et dispositif électronique comprenant ledit ensemble d'antenne

Country Status (1)

Country Link
EP (1) EP2993729A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5184143A (en) * 1989-06-01 1993-02-02 Motorola, Inc. Low profile antenna
WO1999043037A2 (fr) * 1998-02-23 1999-08-26 Qualcomm Incorporated Antenne monoplan a deux bandes
US20020183013A1 (en) * 2001-05-25 2002-12-05 Auckland David T. Programmable radio frequency sub-system with integrated antennas and filters and wireless communication device using same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5184143A (en) * 1989-06-01 1993-02-02 Motorola, Inc. Low profile antenna
WO1999043037A2 (fr) * 1998-02-23 1999-08-26 Qualcomm Incorporated Antenne monoplan a deux bandes
US20020183013A1 (en) * 2001-05-25 2002-12-05 Auckland David T. Programmable radio frequency sub-system with integrated antennas and filters and wireless communication device using same

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