EP3827478A1 - Leiterplatten-antenne - Google Patents
Leiterplatten-antenneInfo
- Publication number
- EP3827478A1 EP3827478A1 EP19734345.2A EP19734345A EP3827478A1 EP 3827478 A1 EP3827478 A1 EP 3827478A1 EP 19734345 A EP19734345 A EP 19734345A EP 3827478 A1 EP3827478 A1 EP 3827478A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- antenna structure
- circuit board
- electrically conductive
- free space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- 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
-
- 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
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
-
- 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
- H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
Definitions
- the invention relates to an antenna for transmitting or receiving radio signals, which can be implemented on a circuit board.
- An electronic device that is set up to communicate via a wireless communication network typically comprises at least one antenna for receiving and / or transmitting radio signals.
- the electronic device can be set up to receive or send radio signals over a multiplicity of different frequency bands, in particular over two different frequency bands or frequency ranges.
- the device can comprise a multi-band antenna, in particular a dual-band antenna.
- Exemplary dual band antennas can e.g. for the frequency bands 2.4 - 2.5 GHz and 5.1 - 5.8 GHz, i.e. for WLAN (Wireless Local Area Network).
- Antennas typically require a reference mass or reference plane for their function.
- the size and shape of such a reference mass typically have a significant influence on the function and radiation characteristics of an antenna.
- An antenna should often be used as a printed circuit board structure or as a metal structure (e.g. as a stamped and bent part) in different sized printed circuit boards.
- the differently sized printed circuit boards represent different reference masses for an antenna.
- a new antenna tuning is typically required for each printed circuit board geometry. Such antenna tuning can be accomplished by changing the antenna structure and / or by using a so-called "matching circuit".
- the present document deals with the technical task of providing a (dual-band) antenna which can be integrated in an efficient manner (in particular without the need for a dedicated antenna tuning) on differently shaped printed circuit boards.
- the task is solved by the independent claim.
- Advantageous embodiments are described, inter alia, in the dependent claims.
- a circuit board antenna comprises an electrically conductive first antenna structure on a first outer layer (in particular a metal layer) of a circuit board.
- the circuit board antenna comprises an electrically conductive first reference area on the first outer layer.
- the circuit board antenna comprises an electrically conductive feed line to the first antenna structure. The first reference area encloses the first antenna structure apart from an isolating recess for the
- a domestic appliance in particular a domestic appliance, which comprises a communication unit for wireless communication (in particular via WLAN), the communication unit having the circuit board antenna described in this document.
- Figure 1a the upper or the first outer layer of a circuit board with an antenna
- Figure 1 b the lower layer or the second outer layer of a circuit board with an antenna
- Figures 1 c and 1c cross sections through printed circuit boards, each with an antenna
- Figures 2a and 2b exemplary dimensions of an antenna.
- the present document deals with the provision of a (dual-band) antenna which can be integrated in an efficient manner on differently dimensioned and / or designed printed circuit boards.
- the (dual-band) antenna should be designed especially for WLAN radio communication in the frequency bands at 2.4GHz and 5GHz.
- FIGS. 1 a and 1 b show an exemplary antenna 100 which is integrated on a printed circuit board 101.
- FIG. 1 a shows the (electrically conductive) upper layer 110 of the printed circuit board 101
- FIG. 1 b shows the (electrically conductive) lower layer 120 of the printed circuit board.
- one or more dielectric layers 130 and optionally one or more (electrically conductive) intermediate layers 140 are located between the upper layer 110 and the lower layer 120.
- the electrically conductive layers 110, 120, 140 can have a layer of metal, in particular copper. The metal can be removed (e.g., etched away) in portions of layers 110, 120, 140 to form different electrically conductive portions within a layer 110, 120, 140, the portions being electrically isolated from one another.
- the upper layer 110 has an electrically conductive (first) antenna structure 113, which is insulated from an electrically conductive (first) reference region 11 via an (electrically non-conductive) (first) free space 112.
- the reference area 1 11 encloses the antenna structure 1 13 as completely as possible.
- the reference region 11 1 surrounding the antenna structure 11 13 is preferably interrupted only at one point in order to form a free space or a recess 11 17 through which or through which an electrically conductive feed line 11 15 is led to the antenna structure 11 13 can.
- the antenna structure 1 13 has a rectangular shape.
- the antenna structure 111 is composed of two rectangles 118, 119, each of which has a specific width and a specific length, the width being smaller than the length in each case.
- the two rectangles 1 18, 1 19 are arranged one behind the other along the length of the rectangles 118, 119, so that an antenna structure 1 13 results with a total length which corresponds to the sum of the length of the two rectangles 118, 1 19.
- the width of the second rectangle 119 is smaller than the width of the first rectangle 118.
- the antenna structure 1 13 can thus be used for transmitting or for receiving signals in a specific frequency range (approximately 5.1-5.8 GHz).
- the antenna structure 1 13 can form a 1/4 radiator for a specific frequency range due to the total length of the antenna structure 1 13.
- the free space 1 12 can be used as a (slot) antenna for a further frequency range (approximately 2.4-2.5 GHz).
- the free space 1 12 can have a certain length, so that the free space 1 12 forms a 1/4 radiator for a further frequency range.
- the antenna structure 113 can be electrically conductively connected to the reference region 11 via an electrically conductive web (in particular via a short-circuit web) 116.
- the electrically conductive web 116 can be arranged at one end of the antenna structure 113, in particular at the narrowest edge of the antenna structure 113.
- the antenna structure 1 13 can thus form a (planar) inverted-F antenna.
- the impedance of the antenna structure 113 can be trimmed to the desired value (e.g. 50 ohms) via the distance between the web 116 and the feed point or the feed line 115.
- 16 electrostatic discharges can be largely kept away from the transmission / reception electronics of the antenna 100 via this short-circuit bridge 1.
- the lower layer 120 is constructed essentially identically to the upper layer 110 (apart from the fact that on the upper layer 1 10 there is additionally provided a feed line 1 12 and the space 117 required for this becomes). This results in a (second) reference area 121, which can correspond to the (first) reference area 11 1 of the upper layer 110.
- the (second) antenna structure 123 of the lower layer 120 can be dimensioned like the (first) antenna structure 113 of the upper layer 110.
- the (Second) free space 122 of the lower layer 120 can be dimensioned like the (first) free space 1 12 of the upper layer 1 10.
- the lower layer 120 can also have an electrically conductive web 126 between the antenna structure 123 and the reference region 121.
- the reference area 1 1 1 of the upper layer 1 10 can be electrically conductively connected to the reference area 121 of the lower layer 120 via one or more vias or vias 1 14.
- the vias or plated-through holes 114 are shown as dots in FIGS. 1a and 1b.
- the antenna structure 1 13 of the upper layer 1 10 can be electrically conductively connected to the antenna structure 1 13 of the lower layer 120 via one or more vias or vias 1 14.
- the web 1 16 of the upper layer 1 10 can also be electrically conductively connected to the web 126 of the lower layer 120 via one or more vias or vias 1 14.
- the exact position of the one or more vias or plated-through holes 114 can vary depending on the via technology.
- FIG. 1 c and 1 d show exemplary cross sections through exemplary printed circuit boards 101 with antenna structures 113, 123.
- a printed circuit board 101 has a dielectric and / or electrically insulating layer 130 between two electrically conductive layers 110, 120.
- the circuit board 101 has (at least) an electrically conductive intermediate layer 140 between the upper layer 110 and the lower layer 120, which is separated from the upper layer 110 and the lower layer 120 by a respective dielectric layer 130 is separated.
- FIGS. 1 a and 1 b illustrates the area 141 in which the antenna structure 1 13, 123 shown in FIGS. 1 a and 1 b, including the free area 1 12, 122, are arranged.
- This area 141 of an intermediate layer 140 is typically to be left out, so that the intermediate layer 140 in this area 141 has no electrically conductive material (in particular no copper).
- the remaining area 142 of an intermediate layer 140 can be connected in an electrically conductive manner to the reference area 11, 121 of the upper layer 110 and the lower layer 120 via the vias or plated-through holes 114.
- FIGS. 2a and 2b show different dimensions of the antenna 100 from FIGS. 1a and 1b.
- FIGS. 2a and 2b show The width 201 of the wider first rectangle 118 of the antenna structure 113, 123;
- Feed line 115 is located
- the width 211 of the free space 112, 122 (transverse to the antenna structure 113, 123);
- the length 212 of the free space 112, 122 (along the antenna structure 113, 123);
- the distance 213 of the antenna structure 113, 123 from the reference area 111, 121 (along the length 203 of the antenna structure 113, 123);
- Dual band antennas for the frequency bands 2.4 - 2.5 GHz and 5.1 - 5.8 GHz are:
- Length 204 4.4 mm; and or
- Width 214 1.77mm; and or
- Thickness of a dielectric layer 130 1.24 mm; and or
- the free space or the recess 117 for the feed line 115 can have a width of 4 mm or less, for example.
- the above values can fluctuate by up to ⁇ 10%.
- the values can be scaled with a common factor F.
- a planar printed circuit board antenna structure 113, 123 is thus described, which is surrounded by the reference ground (i.e. by a reference area 11, 121) or
- the reference regions 111, 121 can be electrically conductively coupled to ground.
- the properties of the antenna 100 are independent of the size of the reference mass of a printed circuit board 101.
- the antenna 100 can be efficiently installed in circuit boards 101 of different sizes without having to change the antenna structure 113, 123 and / or a "matching circuit". Consequently, module approval for the antenna 100 described can be carried out independently of the specific installation situation can be used for different overall devices.
- a circuit board antenna 100 is thus described in this document, which can be implemented in an efficient manner on circuit boards 101 of different dimensions.
- a circuit board 101 typically includes an electrically conductive first outer layer 110 (e.g. a front layer) and an electrically conductive second outer layer 120 (e.g. a lower layer).
- the one or more layers 110, 120 may be electrically isolated from one another by one or more dielectric layers 130.
- the layers 110, 120 can comprise an electrically conductive material, in particular copper.
- the electrically conductive material can be removed from the respective layer 110, 120 at least in regions, in particular in order to form a free space 1 12 between an antenna structure 11 and a reference region 11.
- the circuit board antenna 100 comprises an electrically conductive first antenna structure 113 on the first outer layer 110 of the circuit board 101.
- the first antenna structure 113 can have an elongated shape (for example, like a dipole antenna).
- the circuit board antenna 100 has an electrically conductive first reference region 11 on the first outer layer 110.
- the first reference region 11 1 can be electrically conductively connected to a ground of the printed circuit board 101.
- the circuit board antenna 100 has an electrically conductive feed line 115 to the first antenna structure 113.
- the feed line 115 can essentially be arranged perpendicular to the longitudinal orientation of the first antenna structure 1 13.
- a radio signal received by the first antenna structure 1 13 can be transmitted via the
- Feed line 115 are coupled out. On the other hand, one of the first
- Antenna structure 113 to be transmitted radio signal via the feed line 1 15 are fed into the first antenna structure 1 13.
- the first reference area 11 completely encloses the first antenna structure 11 13, apart from an insulating recess 117 for the feed line 115. This results in an electrically insulating first free space 112 between the first antenna structure 1 13 and the first reference region 1 11.
- the first free space 112 can be adapted to the shape of the first antenna structure 1 13.
- the antenna structure 113 can have an elongated, rectangular shape.
- the first free space can have an elongated, rectangular shape.
- the first antenna structure 113 can thus in a defined manner via a defined first free space to a reference ground or reference plane (i.e. the first
- Reference area 1 11 can be positioned.
- the first reference region 1 11 can form a reference ground for the first antenna structure 1 13, so that the printed circuit board antenna 100 is independent of the size of the reference ground. This enables efficient integration of the first antenna structure 113 into different circuit board designs.
- the circuit board antenna 100 can comprise an electrically conductive second antenna structure 123 on the second outer layer 120 of the circuit board 101. Furthermore, the circuit board antenna 100 can comprise an electrically conductive second reference region 121 on the second outer layer 120. In this case, the second reference area 121 can (substantially) completely surround the second antenna structure 123, so that an electrically insulating second free space 112 results between the second antenna structure 123 and the second reference area 121.
- the first antenna structure 1 13 can be electrically conductively connected to the second antenna structure 1 13 via one or more vias 1 14. Alternatively or in addition, the first can
- Reference area 11 1 can be electrically conductively connected to the second reference area 121 via one or more vias 1 14.
- the transmission / reception properties of the printed circuit board antenna 100 can be improved (in particular with regard to a field spread that is as uniform as possible).
- the second antenna structure 123 is dimensioned essentially identically to the first antenna structure 113.
- the second free area 122 apart from the insulating recess 117 for the feed line 115, is dimensioned essentially identically to the first free area 112. The same radiation characteristics can thus be brought about on both sides of the printed circuit board 101.
- the first antenna structure 1 13 can be substantially rectangular, the length 203 of the first antenna structure 113 being (substantially) greater than the width 201, 214 of the first antenna structure 1 13 (for example by a factor of 2, 3, 4 or more).
- the first free space 1 12 can be substantially rectangular, the length 212 of the first free space 112 being greater than the width 211 of the first free space 112 (e.g. by a factor of 2, 3, 4 or more).
- the first antenna structure 113 can be a dual-band antenna for a first
- the first frequency range can be in particular 2.4-2.5 GHz and the second frequency range
- the first antenna structure 113 can have a first width 201 in a first area 118 and a (different) second width 214 in a second area 119, the second width 214 being smaller than the first width 201. Furthermore, the first antenna structure 113 can have an overall length 213, and the first region 118 of the first antenna structure 113 can have a partial length. The total length 213 of the first antenna structure 113 can depend on the second frequency range in which the antenna 100 is to transmit and / or receive. In particular, the
- Antenna structure 113 forms a 1/4 radiator with respect to the second frequency range. In this way, a multi-band antenna can be provided in an efficient and precise manner. io
- the widths 201, 214 and / or the partial length of the first region 118 can be used to adjust the bandwidth of the antenna structure 113 to the bandwidth of the second frequency range.
- the first free space 1 12 between the first antenna structure 1 13 and the first reference range 1 1 1 can be used as a (slot) antenna for the first frequency range.
- the width 21 1 and / or the (total) length 212 of the first free space 1 12 can be set.
- the positioning of the first antenna structure 113 within the first free space 1 12 can be adapted.
- Antenna structure 113 can be used in a variety of different circuit board designs.
- the embedding of the first antenna structure 113 on a first layer 110 of a printed circuit board 101 can also be used to provide a multi-band antenna 100 in an efficient manner.
- the first antenna structure 113 can have a first width 201 in the first region 118 with a value of F * 2.10 mm ⁇ 10%.
- the first antenna structure 1 13 in the second region 119 can have a second width 214 with a value of F * 1, 77 mm ⁇ 10%.
- the first antenna structure 113 can have a first width 201 in the first region 118 with a value of F * 2.10 mm ⁇ 10%.
- the first antenna structure 1 13 in the second region 119 can have a second width 214 with a value of F * 1, 77 mm ⁇ 10%.
- the first antenna structure 113 can have a first width 201 in the first region 118 with a value of F * 2.10 mm ⁇ 10%.
- the first antenna structure 1 13 in the second region 119 can have a second width 214 with a value of F * 1, 77 mm ⁇ 10%.
- the first antenna structure 113 can have a first width 201 in the first region 118 with a value of F * 2.10
- Antenna structure 1 13 have an overall length 203 with a value of F * 12.52 mm ⁇ 10%.
- the second region 119 can be the first
- Antenna structure 113 a partial length 204 with a value of F * 4.40 mm ⁇ 10%
- the first free space 1 12 can have an overall width 21 1 with a value of F * 30.00 mm ⁇ 10%.
- the first free space 112 can have an overall length 212 with a value of F * 5.50 mm ⁇ 10%.
- a circuit board antenna 100 with one or more defined frequency bands can be provided, which can be integrated into different circuit board designs in an efficient manner.
- first outer layer 110 and the second outer layer 120 are typically each formed by an electrically conductive layer, in particular formed by a copper layer, a printed circuit board 101. Furthermore, the first outer layer 110 and the second outer layer 120 are typically insulated from one another by at least one dielectric layer 130.
- a printed circuit board 101 can have at least one electrically conductive one
- Intermediate layer 140 (e.g. a copper layer), which is arranged between the first outer layer 110 and the second outer layer 120.
- Intermediate layer 140 then preferably faces in a region 141 of the first
- Antenna structure 131 and the first free space 112 have no electrically conductive material (in particular no copper).
- the intermediate layer 140 in an area 142 of the first reference area 11 1 can be connected in an electrically conductive manner to the first reference area 11 1 via one or more vias 1 14. In this way, even in the case of a printed circuit board 101 with one or more intermediate layers 140, a printed circuit board antenna 100 can be provided in an efficient and precise manner.
- the first antenna structure 113 can be electrically conductively connected to the first reference region 11 via an electrically conductive web 116.
- the web 1 16 can have a much greater length than its width, in particular by a factor of 10 or more.
- the web 116 can run parallel to the feed line 115.
- the web 1 16 can run perpendicular to the longitudinal direction of the first antenna structure 1 13.
- the web 116 can be arranged at one end of the first antenna structure 113 (with respect to the longitudinal direction of the first antenna structure 113).
- Antenna structure 113 can be set in an efficient and precise manner. Furthermore, the required size of the antenna structure 113 can be reduced. Furthermore, electrostatic discharges from the transmitter / receiver electronics of the transmitter can be reliably transmitted via the (short-circuit) bridge 116 to the first reference region 11 1
- described antenna 100 can be kept away.
- the present document further describes a domestic appliance, in particular a domestic appliance, which comprises a communication unit for wireless communication, the communication unit having the printed circuit board antenna 100 described in this document.
- a domestic appliance in particular a domestic appliance, which comprises a communication unit for wireless communication, the communication unit having the printed circuit board antenna 100 described in this document.
- the present invention is not restricted to the exemplary embodiments shown. In particular, it should be noted that the description and the figures are only intended to illustrate the principle of the proposed devices and systems.
Landscapes
- Details Of Aerials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018212319.5A DE102018212319A1 (de) | 2018-07-24 | 2018-07-24 | Leiterplatten-Antenne |
| PCT/EP2019/066813 WO2020020556A1 (de) | 2018-07-24 | 2019-06-25 | Leiterplatten-antenne |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3827478A1 true EP3827478A1 (de) | 2021-06-02 |
| EP3827478B1 EP3827478B1 (de) | 2023-09-27 |
Family
ID=67107422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19734345.2A Active EP3827478B1 (de) | 2018-07-24 | 2019-06-25 | Leiterplatten-antenne |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3827478B1 (de) |
| DE (1) | DE102018212319A1 (de) |
| WO (1) | WO2020020556A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024201094A1 (de) * | 2024-02-07 | 2025-08-07 | BSH Hausgeräte GmbH | Leiterplatten-Antenne für WiFi 6E Frequenzbänder |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2783115B1 (fr) * | 1998-09-09 | 2000-12-01 | Centre Nat Rech Scient | Antenne perfectionnee |
| EP2774216B1 (de) * | 2011-11-04 | 2021-05-05 | Dockon AG | Kapazitiv gekoppelte zusammengesetzte rahmenantenne |
| TW201427181A (zh) * | 2012-12-25 | 2014-07-01 | Compal Electronics Inc | 多頻天線 |
| EP3123559B1 (de) * | 2014-03-26 | 2020-01-01 | Thomson Licensing | Antennen struktur im mehrschichtigen dielektrikum |
| JP5824563B1 (ja) * | 2014-09-22 | 2015-11-25 | 学校法人智香寺学園 | 小型スロット型アンテナ |
| CN105591196A (zh) * | 2015-12-12 | 2016-05-18 | 浙江利尔达物联网技术有限公司 | 一种多面pcb天线 |
-
2018
- 2018-07-24 DE DE102018212319.5A patent/DE102018212319A1/de not_active Ceased
-
2019
- 2019-06-25 EP EP19734345.2A patent/EP3827478B1/de active Active
- 2019-06-25 WO PCT/EP2019/066813 patent/WO2020020556A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018212319A1 (de) | 2020-01-30 |
| WO2020020556A1 (de) | 2020-01-30 |
| EP3827478B1 (de) | 2023-09-27 |
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