EP4071930A1 - Antennenanordnung und fahrzeug - Google Patents

Antennenanordnung und fahrzeug Download PDF

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Publication number
EP4071930A1
EP4071930A1 EP21465517.7A EP21465517A EP4071930A1 EP 4071930 A1 EP4071930 A1 EP 4071930A1 EP 21465517 A EP21465517 A EP 21465517A EP 4071930 A1 EP4071930 A1 EP 4071930A1
Authority
EP
European Patent Office
Prior art keywords
pad
connection pad
printed circuit
circuit board
antenna
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.)
Pending
Application number
EP21465517.7A
Other languages
English (en)
French (fr)
Inventor
Guy-Aymar Chakam
Razvan Bejinaru
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.)
Continental Automotive Technologies GmbH
Original Assignee
Continental Automotive Technologies GmbH
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 Continental Automotive Technologies GmbH filed Critical Continental Automotive Technologies GmbH
Priority to EP21465517.7A priority Critical patent/EP4071930A1/de
Publication of EP4071930A1 publication Critical patent/EP4071930A1/de
Pending 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
    • H01Q1/27—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
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • 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 invention concerns an antenna assembly and a vehicle.
  • Antenna assemblies for cars are e. g. known from EP2466552B1 , which concerns an antenna assembly with a PIFA antenna connected to a PCB.
  • an antenna assembly especially for a vehicle, comprises:
  • the antenna feed and ground connections do not need to be galvanically connected to the associated electrical circuit connections on a printed circuit board. Both feed and ground pins of the antenna can only be capacitively coupled to the electronic circuit inputs of a printed circuit board without any galvanic contact. Press-fit or soldering are not necessary and, also, no possibility of imperfect electrical contact or corrosion during time should occur.
  • the invention also comprises embodiments that provide features which afford additional technical advantages.
  • the antenna assembly is comprising on the underside of one layer of the printed circuit board
  • the (PCB) feedline pad and the (PCB) groundline pad are in the area of the (antenna) feed connection pad and the (antenna) ground connection pad.
  • the printed circuit board is without (copper) metallization, especially to avoid electrical galvanic contact of the feed connection pad and the ground connection pad with the printed circuit board, which electrical galvanic contact is not necessary due to capacitive (and/or inductive) coupling.
  • the (PCB) feedline pad and the (PCB) groundline pad are located on the side opposite to the antenna side of the printed circuit board preferably on an inner layer, which also contains an electronic circuit for at least one telecommunication and/or telephony system.
  • the antenna assembly comprises at least one screw for fixing of the antenna element on the printed circuit board by fastening the screw through a housing that holds the antenna element and goes through the printed circuit board, especially with no electrical contact between the screw and the antenna element, preferably pressing the feed connection pad and the ground connection pad of the antenna element onto the printed circuit board.
  • the antenna element comprises preferably a conductive metal sheet and/or is a PIFA or IFA antenna element.
  • the antenna assembly comprises at least one antenna element for cellular mobile communication and/or for WiFi communication and/or for a satellite positioning system.
  • the invention also provides a vehicle comprising an antenna assembly.
  • the invention also comprises the combinations of the features of the described embodiments.
  • Fig. 6 and 7 show an antenna assembly 1 with one or more antenna elements on the roof 2 of a vehicle 3 (e.g. a passenger car or truck or bus).
  • a vehicle 3 e.g. a passenger car or truck or bus.
  • Fig. 1 and Fig. 2 each respectively are a schematic illustration of an embodiment of an inventive antenna assembly 1 (e.g. for a roof 2 of a vehicle 3), comprising:
  • Fig. 2 shows a schematic illustration of an embodiment of an inventive antenna assembly 1, wherein the printed circuit board 4 comprises two layers 14, 15, each with a top side 12; 17 and bottom side 18; 19 (wherein 12 here is the upper side 5 of the PCB and the upper side 12 of the top layer of the PCB).
  • the feed connection pad 7 is capacitively coupled (through one layer 14 of the printed circuit board 4) to a (dotted) feedline pad 9 of the printed circuit board 4
  • the ground connection pad 8 is capacitively coupled (through one layer 14 of the printed circuit board 4) to a (dotted) ground line pad 10 of the printed circuit board 4.
  • the feedline pad 9 of the printed circuit board 4 is opposite to the feed connection pad 7 of the antenna element 11, and the ground line pad 10 of the printed circuit board 4 is opposite to the ground connection pad 8 of the antenna element 11 ('opposite" meaning on opposite sides of one layer 14 of the printed circuit board 4). So the feedline pad 9 and the groundline pad 10 are in the area of the feed connection pad 7 and the ground connection pad 8, fully or partially overlapping.
  • the feed line 13 for the antenna element 11 comprises enlarged area at its ends forming the feedline pad 9 and the groundline pad 10 is a defined surface directly connected to rest of the ground and to the other ground layers while using vias e.g. 16 In the embodiment in Fig.
  • the printed circuit board 4 is without copper metallization where the antenna feeding pin and the grounding pin is touching the PCB (top or bottom layer), especially to avoid electrical galvanic contact of the feed connection pad 7 and the ground connection pad 8 with the printed circuit board 4.
  • the antenna assembly 11 comprises at least one screw 22, 23 for fixing of the antenna element 11 on the printed circuit board 4 by fastening the screw(s) 22, 23 through a housing 21 that holds the antenna element 11 and goes through the printed circuit board 4, especially with no electrical contact between the at least one screw 22, 23 and the antenna element 11, preferably pressing the feed connection pad 7 and the ground connection pad 8 of the antenna element 11 onto the printed circuit board 4.
  • the antenna element 11 can e.g. comprise a conductive metal sheet and/or it can be a PIFA or IFA antenna element.
  • the antenna assembly 1 can comprise one antenna element 11 or two or more antenna elements for cellular mobile communication and/or for WiFi communication and/or for a satellite positioning system and or for further purposes.
  • Embodiments of the invention can avoid high cost given by possible alternative implementation/mounting processes, in which a classic metallic IFA or PIFA structure antenna has to be fixed in the plastic housing and also soldered on the mainboard to ensure an electrical contact with the corresponding circuit.
  • Embodiments of the invention are proposing an idea for the implementation of an antenna in telephony systems which addresses the problems mentioned above. This can still allow using a PIFA design, but a difference consists in the fact that the antenna feed and ground connections do not need to be galvanically connected anymore to the associated electrical circuit connections. Both feed and ground pins of the antenna can only be capacitively coupled to the electronic circuit inputs without any galvanic contact. This can mean that there is no press-fit or soldering needed and, also, no possibility of imperfect electrical contact or corrosion during time.
  • An antenna element 11 of the antenna assembly 1 can be is realized out of conductive metal sheet in the form of a PIFA structure with one feeding pin (with feed connection pad 7) and one grounding pin (with ground connection pad 8).
  • the antenna element's multiple resonances to cover the needed multi-bands for telephony services can be realized by making slots on the upper and lateral surface of the metal sheet element.
  • Both the feeding and the grounding pins are ended by enlarged pads 7, 8, parallel to the PCB 4 surface.
  • These pads 7, 8 will be placed directly on the (when mounted) upper surface 5 of the PCB that here contains electronic circuit for a telephony system, but in the areas 24, 25 surrounding these two pads 7, 8 there is no copper metallization, therefore no electrical contact (of the pads 7, 8 with the printed circuit board 4).
  • the feed and ground strip-lines 16, 17 for a telephone antenna 11 are routed.
  • the antenna assembly 1 can be fixed in a plastic housing in a few plastic hot-melted points, then the complete housing can be pressed on the printed circuit board 4 with screws 22, 23 e. g in four corners, from which e.g. one of them can be going through the antenna ground pin (e.g. through the pad 8).
  • the antenna feeding pin (pad 7) can be held in place and pressed onto the printed circuit board 4 by a housing shoulder behind it.
  • FIG. 4 shows an input reflection coefficient of the antenna without matching in a simulation.
  • Fig. 5 shows an input reflection coefficient and efficiency of the antenna with matching in a measurement.
  • the presented result data is showing very good performance for the desired frequency bands, both in overall (S11) and radiation efficiency. Also, from the radiation pattern measurements, a total gain with a good behavior was obtained, quasi-omnidirectional on the entire frequency range.
  • the described embodiments of the invention can be successfully implemented in real life, delivering the required performance in automotive telephony products.
  • the design can be, of course, extended to other services, by changing the dimensions of the antenna elements and adapting the frequency bands.

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Details Of Aerials (AREA)
EP21465517.7A 2021-04-08 2021-04-08 Antennenanordnung und fahrzeug Pending EP4071930A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21465517.7A EP4071930A1 (de) 2021-04-08 2021-04-08 Antennenanordnung und fahrzeug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21465517.7A EP4071930A1 (de) 2021-04-08 2021-04-08 Antennenanordnung und fahrzeug

Publications (1)

Publication Number Publication Date
EP4071930A1 true EP4071930A1 (de) 2022-10-12

Family

ID=75887982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21465517.7A Pending EP4071930A1 (de) 2021-04-08 2021-04-08 Antennenanordnung und fahrzeug

Country Status (1)

Country Link
EP (1) EP4071930A1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050001768A1 (en) * 2003-05-29 2005-01-06 Masami Sekiguchi Surface mount antenna, and an antenna element mounting method
US20050093678A1 (en) * 2003-11-04 2005-05-05 Forster Ian J. RFID tag with enhanced readability
US20060192712A1 (en) * 2005-02-25 2006-08-31 Samsung Electro-Mechanics Co., Ltd. Antenna module and electronic device using the same
US20090015497A1 (en) * 2006-02-14 2009-01-15 Murata Manufacturing Co., Ltd Antenna structure and wireless communication apparatus including same
US20090033570A1 (en) * 2007-07-30 2009-02-05 High Tech Computer Corp. Antenna module and electronic device using the same
EP2466552B1 (de) 2010-12-20 2018-07-25 Continental Automotive GmbH Bordinformationssystem mit Mobilfunkantenne
DE102017010514A1 (de) * 2017-11-10 2019-05-16 Heinz Lindenmeier Empfangsantenne für die Satellitennavigation auf einem Fahrzeug

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050001768A1 (en) * 2003-05-29 2005-01-06 Masami Sekiguchi Surface mount antenna, and an antenna element mounting method
US20050093678A1 (en) * 2003-11-04 2005-05-05 Forster Ian J. RFID tag with enhanced readability
US20060192712A1 (en) * 2005-02-25 2006-08-31 Samsung Electro-Mechanics Co., Ltd. Antenna module and electronic device using the same
US20090015497A1 (en) * 2006-02-14 2009-01-15 Murata Manufacturing Co., Ltd Antenna structure and wireless communication apparatus including same
US20090033570A1 (en) * 2007-07-30 2009-02-05 High Tech Computer Corp. Antenna module and electronic device using the same
EP2466552B1 (de) 2010-12-20 2018-07-25 Continental Automotive GmbH Bordinformationssystem mit Mobilfunkantenne
DE102017010514A1 (de) * 2017-11-10 2019-05-16 Heinz Lindenmeier Empfangsantenne für die Satellitennavigation auf einem Fahrzeug

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Owner name: CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH