EP2917966A1 - Three-dimensional antenna - Google Patents
Three-dimensional antennaInfo
- Publication number
- EP2917966A1 EP2917966A1 EP13798246.8A EP13798246A EP2917966A1 EP 2917966 A1 EP2917966 A1 EP 2917966A1 EP 13798246 A EP13798246 A EP 13798246A EP 2917966 A1 EP2917966 A1 EP 2917966A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- antenna according
- windings
- platings
- base
- 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- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
- H01Q5/35—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
- H01Q7/08—Ferrite rod or like elongated core
Definitions
- the present invention refers to a three-dimensional antenna, capable of receiving and/or transmitting signals on any of the three dimensions, in addition, the antenna has an operating capacity at both low and high frequency (Hybrid).
- the present invention can be used in applications such as automotive because of its compatibility with Automated Optical Inspection systems, also known as AOI, and its wide range of operating frequencies.
- a three-dimensional hybrid antenna can be found for example in Spanish Patent ES-B1 -2200652 that discloses a three dimensional antenna comprising a rectangular shaped monolithic magnetic core, with a three mutually orthogonal windings arranged so that the antenna receives a signal in each of the windings when is subjected to a low frequency electromagnetic field.
- the embodiment disclosed in the aforementioned document ES2200652 has a core adhesively bonded to a plastic base, being said plastic base provided with terminals on its bottom side for interconnection between the windings disposed surrounding the core and external systems.
- the devices of the prior art have problems with the robustness of their connections, in that the terminals arranged in the plastic base usually are filaments with a reduced dimension. Moreover, the junction between the base and the core must necessarily be made by adhesives that must support a wide range of temperatures. Furthermore, these connections are usually in non-visible areas, so an optical inspection can not determine whether the connections are correct. In current devices, such inspections require more sophisticated measurements than visual inspection, consequently, this operation slow down the production process.
- the EP1489683 document discloses a three-dimensional antenna which, according to one of the embodiments described, has a monolithic core around which windings are wound, said core being provided with metal terminal plates attached, which are used as connectors with the base, the ends of the windings are welded on this metal terminal plates to assure a secure electrical connection.
- the connectors should be first produced from a metal plate and then attached to the core in a not specified manner. This construction is expensive and requires accurate assembly processes due to the small size of the antenna; there is also the possibility that these connectors are accidentally detached from the core, producing an antenna failure.
- the proposed arrangements in the prior art lack the flexibility to add new antennas (or derivatives of existing antennas) in that they require the manufacture of a new base, or in the best case, the required peel adhesive that bonds the core to the base to access the terminal connections.
- the antennas disclosed in the prior art operate only at low frequency and current industrial applications require that such antennas may also operate at higher frequencies while maintaining or reducing its current volume.
- the present invention provides a three-dimensional antenna that operates over a wide frequency range (between 5 KHz and 30 MHz), which has a higher connections strength and that is compatible with automated optical inspection systems (AOI).
- AOI automated optical inspection systems
- the present invention relates to a three-dimensional antenna comprising:
- the base is a printed circuit board comprising a plurality of first platings or metallizations connected to the windings, said first platings extended through the top of the printed circuit board, and said at least one core comprises a second platings which are connected to the windings and to said base first platings.
- first platings also cover side sections of the base.
- the aforementioned at least one core is concerned, according to a first embodiment, to a single monolithic core, around which the three windings are wound about three core orthogonal axes.
- a second alternative embodiment includes three independent cores, each with an axis around which a winding is wound, said three cores are fixed on the base so that said axes of said three cores remain mutually orthogonal.
- core as used in this description refers to this monolithic core or to this set of three cores indistinctly.
- plating or metallization refers to additions or extensions of electrically conductive metal layer on the core or base.
- the bond between the core and the second platings is performed by the core manufacturing process itself, by chemical bath and subsequent processes of sintering, the remaining connections between the windings and the platings are made by welding, achieving overall a greater strength of the connections.
- the base is a printed circuit board comprising a plurality of platings connected to the windings through the second platings, said first platings may extend to partially cover the sides of the printed circuit board, to provide electrical connections through lateral contact.
- the core is a ferrite core, more specifically the core may be a ferrite core comprising a Nickel-Zinc alloy, a Manganese-Zinc alloy, or amorphous Cobalt.
- This core composition provide ferromagnetic qualities necessary for its operation, while high
- electrical resistivity preferably equal to or greater than 10 Dm, which allows its surface second platings to be electrically isolated with respect to each other .
- the aforesaid orthogonal windings are configured for operation at low frequencies (approximately between 300KHz and 5KHz) and further provides at least one winding with a smaller number of turns in such a way which provides a high frequency operation (approximately between 3MHz and 30MHz). Since the directivity at high frequencies is not so critical to the operation of the antennas, it can be used a single high frequencies winding, which can be added to the aforementioned windings to provide an antenna operation in two or three dimensions.
- the high frequency winding may be a branch from an intermediate point of one low frequency winding. Additionally, branches can be provided in the three low frequency windings to obtain a three-dimensional antenna also at high frequencies without increasing the volume of the device.
- the high frequency winding can be printed and/or embedded in the printed circuit board.
- the over-mold can be vacuum molded.
- a preferred material for said over-mold is a polymer material comprising a high thermal performance plastic, capable of withstanding the high temperatures reached during operation and assembly without burning.
- Figure 1 shows a perspective view of an antenna according to a first embodiment of the present invention
- Figure 2 shows a perspective view an exploded view according to a first embodiment of the antenna of Figure 1 ;
- Figure 3 shows a perspective view of an exploded view of a core, a first and second windings and a base for an antenna according to a first embodiment of the present invention
- Figure 4 shows a perspective view of a monolithic core according to a first embodiment of the present invention
- Figure 5 shows a perspective view of a core, a first and second windings and a base for an antenna according to a first embodiment of the present invention
- Figure 6 shows a perspective view of a core, a first and second windings and a base for an antenna, and a third winding, corresponding with the Z axis, in an exploded position, according to a first embodiment of the present invention
- Figure 7 shows a perspective view of an antenna according to a second embodiment of the present invention.
- Figure 8 shows a perspective view an exploded view according to a second embodiment of the present invention.
- Figure 9 shows a perspective view of a core with a horizontal axis around which a winding is wound, according to a second embodiment of the present invention.
- Figure 10 shows a perspective view from the bottom side of a circular core with a vertical axis around which a winding is wound, according to a second embodiment of the present invention.
- Figure 1 shows an antenna 1 comprising a covering 60 and a printed circuit board 30 (also known as PCB) being the internal components of the antenna embedded in that covering 60.
- the covering 60 may be a pre-molded cover, or an over-molded or vacuum molded cover, directly molded on the components arranged on the printed circuit board 30.
- Figures 2 and 3 show an exploded view of the antenna 1.
- the antenna 1 comprising a base, a monolithic core 10, and three windings 21 , 22 and 23 wound around three orthogonal axes of said monolithic core 10.
- the cited covering 60 encapsulates said core 10 and said windings 21 , 22 and 23, being this encapsulating material preferably a plastic polymer with high thermal stability and low contraction coefficient, able to resist the high temperatures achieved during the antenna 1 operation.
- the core of this embodiment is a monolithic core and its shape has four corner blocks .13, two side arms 12 and a flat body 11.
- the flat body 11 around which the first winding 21 is wound, has a lower thickness than the side arms 12, allowing the second winding 22 to be wound around said two lateral arms 12 perpendicular to the said first winding 21 without contacting with said first winding 21.
- the four corner blocks 13 act as retaining elements for the first and second windings 21 and 22, and allow wounding the third winding 23 without contact with the other two windings 21 and 22.
- the core 10 has integrally four electrically conductive second platings 50 at its corner lower surface, these four second platings 50 are each connected by welding to one initial section or end of the first and second windings 21 and 22, providing a single piece including core 10, first and second windings 21 and 22 and electric connectors without loose wires.
- the base is a printed circuit board or PCB 30, and includes between six to twelve electrically conductive first platings 40.
- the PCB 3 comprises six electrically conductive first platings 40 in the PCB 3 upper surface, four of them configured and arranged to be electrically connected with the second platings 50 of the core 10 by contact and welding, and the others configured to be electrically connected with the third winding 23 welding their ends on it. This third winding 23 is overlapped to the core 10 after welding the core 10 to the PCB 30 (Fig. 6).
- some of the first platings 40 has a upper portions 41 disposed on the upper face of the PCB 30 in a position coincident with the mounting position of second platings 50 of the core 10, and a side portions 42 which extends through the side faces the PCB 30, and being connected to the upper portions 41 through a printed circuit 43.
- This configuration allows easy and strong electrical connection between the three windings 21 , 22 and 23 and side portions 42 of the first platings 40, disposed on the side surfaces of the PCB 30, through the second platings 50, allowing an easy connection to other systems, which eliminates the need for terminals connection which usually is a no automatized process.
- this antenna 1 when this antenna 1 is incorporated into another system the electric connections with this system are not hidden under the bottom of the PSB 30, as in the known state of the art, thanks to this side portions 42 of the first platings 40 these electrical connections may be lateral, and may be visible and checked by an automatic optical inspection (AOI) to determine a proper welding.
- AOI automatic optical inspection
- the aforesaid windings 21 , 22 and 23 are configured for operation at low frequencies (approximately between 300KHz and 5KHz) and further provides at least one winding with a smaller number of turns in such a way which provides a high frequency operation (approximatel between 3MHz and 30MHz). Since the directivity at high frequencies is not so critical to the operation of the antennas, it can be used a single high frequencies winding, which can be added to the aforementioned windings 21 , 22 and 23 to provide a antenna 1 operation in two or three dimensions.
- the high frequency winding may be a branch from an intermediate point of one low frequency winding 21 , 22 and/or 23. Additionally, branches can be provided in the three low frequency windings 21 , 22 and 23 to obtain a three-dimensional antenna 1 also at high frequencies without increasing the volume of the device.
- the high frequency winding can be printed and/or embedded in the printed circuit board 30.
- the PCB 30 may have additional side portions 42 of the first platings 40 along its lateral sides, connected with the aforesaid high frequency winding or windings, allowing his connection with a system in the same way as the first, second and third winding 21 , 22 and 23.
- the core 10 is usually a ferrite core, ferrite core having an electrical resistivity equal to or greater than 10 Qm.
- a core made of Ni-Zn alloy, or Mn-Zn other embodiments may incorporate a core made of amorphous cobalt, or a combination of this elements.
- the windings 21 , 22 and 23 are preferably of a diameter between 0.01 mm and 1 mm and can be preferably enameled copper wire with polyurethane and/or polyamide with a heat index exceeding 150°C.
- Second platings 50 are formed onto the core 10, preferably by chemical baths and are preferably made of Sn100 tin to facilitate its soldering to the PCB 30.
- the third winding 23 is superposed to the core 10, as shown in Figure 6, and is fixed on the PCB 30 by four bonding adhesives points 70, and said third winding 23 is electrically connected to the first platings 40 by welding.
- Figure 5 shows the assembly of the core 10 with the first and second windings 21 and 22 disposed on the PCB 30.
- Figure 7 shows a full view of the assembled antenna 1
- Figure 8 an exploded view of the antenna 1 , showing the base integrating the core 10 and the windings 21 , 22 and 23, the covering 60, and an optional cushioning material 61.
- this alternative embodiment includes three independent cores 10a, 10b and 10c, each with an axis around which a winding 21 , 22 or 23 is wound, said three cores 10a, 10b and 10c are fixed on the PCB 30 so that said axes of said three cores 10a, 10b and 10c remain mutually orthogonal working together as a single monolithic core 10.
- Figure 9 shows a core 10a or 10b with a horizontal axis corresponding to the axis "X" or "Y”
- Figure 10 shows a lower view of a core 10c with a vertical axis "Z”.
- the winding 21 , 22 and 23 initial section and ends are electrically connected by welding with these second platings 50, securing its correct electrical connection.
- the base of this embodiment is equivalent to that of the previous embodiment, and also has the first platings 40, which has a upper portions 41 disposed on the upper face of the PCB 30 in a position coincident with the mounting position of second platings 50 of the cores 10a, 10b and 10b, and a side portions 42 which extends through the side faces of the PCB 30, and being connected to the upper portions 41 through a printed circuit 43, as shown in Figure 8.
- These first platings 40 can also be printed.
Landscapes
- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES201231729A ES2459892B1 (en) | 2012-11-12 | 2012-11-12 | Three-dimensional antenna |
ES201231728A ES2460368B1 (en) | 2012-11-12 | 2012-11-12 | Three-dimensional antenna |
PCT/EP2013/003396 WO2014072075A1 (en) | 2012-11-12 | 2013-11-11 | Three-dimensional antenna |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2917966A1 true EP2917966A1 (en) | 2015-09-16 |
Family
ID=49679471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13798246.8A Withdrawn EP2917966A1 (en) | 2012-11-12 | 2013-11-11 | Three-dimensional antenna |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2917966A1 (en) |
ES (2) | ES2459892B1 (en) |
WO (1) | WO2014072075A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015104993A1 (en) | 2015-03-31 | 2016-10-06 | Epcos Ag | antenna device |
JP6451470B2 (en) * | 2015-04-10 | 2019-01-16 | 株式会社村田製作所 | 3-axis antenna coil |
ES2716882T3 (en) * | 2015-11-04 | 2019-06-17 | Premo Sa | Antenna device for HF and LF operations |
WO2018211548A1 (en) * | 2017-05-15 | 2018-11-22 | Smk-Logomotion株式会社 | Antenna device |
EP3432421B1 (en) | 2017-07-18 | 2021-04-14 | Premo, S.A. | Three-axis antenna with improved quality factor |
EP3493325B1 (en) | 2017-11-29 | 2022-02-23 | Premo, S.A. | Ultra-low-profile triaxial low frequency antenna for integration in a mobile phone and mobile phone therewith |
EP3731245A1 (en) * | 2019-04-24 | 2020-10-28 | Premo, S.A. | Ultra-low-profile low frequency antenna |
EP3855566B1 (en) | 2020-01-23 | 2024-05-01 | Premo, SL | Multiband 3d universal antenna |
EP4381531A1 (en) | 2021-08-03 | 2024-06-12 | Premo, SL | Surface mounting inductive coiled component for mounting on printed circuit boards |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4218044B2 (en) * | 1999-11-25 | 2009-02-04 | 株式会社エフ・イー・シー | 3D antenna |
ES2200652B1 (en) | 2001-11-07 | 2005-05-01 | Predan S.A. | MONOLITICAL ANTENNA WITH SENSITIVITY IN THE THREE AXES FOR APPLICATIONS IN TRANSPONDERS FOR AUTOMOTIVE. |
CN1623251A (en) * | 2002-03-05 | 2005-06-01 | 日商·胜美达股份有限公司 | Antenna coil |
JP2004134957A (en) * | 2002-10-09 | 2004-04-30 | Matsushita Electric Ind Co Ltd | Surface mounting type antenna and surface mounting type antenna apparatus using the same |
JP4458780B2 (en) * | 2003-07-11 | 2010-04-28 | シチズン電子株式会社 | Antenna device for radio clock |
JP2005124013A (en) * | 2003-10-20 | 2005-05-12 | Toko Inc | Three-axis antenna coil |
DE10351119A1 (en) * | 2003-11-03 | 2005-06-02 | Neosid Pemetzrieder Gmbh & Co Kg | Inductive miniature component, in particular antenna |
EP2293384B1 (en) * | 2006-04-07 | 2013-07-10 | Sumida Corporation | Antenna coil |
US8043522B2 (en) * | 2007-08-31 | 2011-10-25 | Hitachi Metals, Ltd. | Ferrite material and method for producing ferrite material |
CN201789061U (en) * | 2010-08-04 | 2011-04-06 | 普莱默电子(无锡)有限公司 | Enhanced 3D antenna applied to keyless entering system |
CN201789056U (en) * | 2010-08-04 | 2011-04-06 | 普莱默电子(无锡)有限公司 | Z-axis antenna for automobile antitheft device and keyless entry system |
-
2012
- 2012-11-12 ES ES201231729A patent/ES2459892B1/en active Active
- 2012-11-12 ES ES201231728A patent/ES2460368B1/en active Active
-
2013
- 2013-11-11 WO PCT/EP2013/003396 patent/WO2014072075A1/en active Application Filing
- 2013-11-11 EP EP13798246.8A patent/EP2917966A1/en not_active Withdrawn
Non-Patent Citations (2)
Title |
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None * |
See also references of WO2014072075A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2014072075A4 (en) | 2014-08-07 |
ES2460368B1 (en) | 2015-03-10 |
ES2459892A1 (en) | 2014-05-12 |
WO2014072075A1 (en) | 2014-05-15 |
ES2459892B1 (en) | 2015-03-10 |
ES2460368A1 (en) | 2014-05-13 |
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Legal Events
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Effective date: 20150612 |
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Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
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AX | Request for extension of the european patent |
Extension state: BA ME |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: NAVARRO PEREZ, FRANCISCO EZEQUIEL Inventor name: ROJAS CUEVAS, ANTONIO Inventor name: VILLARRRUBIA GARCIA, MARIA MAR Inventor name: FERNANDEZ REINA, JUAN |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: VILLARRRUBIA GARCIA, MARIA MAR Inventor name: NAVARRO PEREZ, FRANCISCO EZEQUIEL Inventor name: ROJAS CUEVAS, ANTONIO Inventor name: FERNANDEZ REINA, JUAN |
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DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20161115 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PREMO, S.L. |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20180828 |