NL2019257B1 - Antenna of a dielectric resonator type, and method of producing such an antenna - Google Patents
Antenna of a dielectric resonator type, and method of producing such an antenna Download PDFInfo
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- NL2019257B1 NL2019257B1 NL2019257A NL2019257A NL2019257B1 NL 2019257 B1 NL2019257 B1 NL 2019257B1 NL 2019257 A NL2019257 A NL 2019257A NL 2019257 A NL2019257 A NL 2019257A NL 2019257 B1 NL2019257 B1 NL 2019257B1
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- 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
- H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
- H01Q1/2266—Supports; Mounting means by structural association with other equipment or articles used with computer equipment disposed inside the computer
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/105—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by conversion of non-conductive material on or in the support into conductive material, e.g. by using an energy beam
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Abstract
Description
Octrooicentrum Nederland © 2019257 © Aanvraagnummer: 2019257 © Aanvraag ingediend: 17 juli 2017 © B1 OCTROOI © Int. Cl.:Netherlands Patent Office © 2019257 © Application number: 2019257 © Application filed: July 17, 2017 © B1 PATENT © Int. Cl .:
H01Q 1/22 (2018.01) H05K 3/10 (2018.01)H01Q 1/22 (2018.01) H05K 3/10 (2018.01)
54) Antenna of a dielectric resonator type, and method of producing such an antenna54) Antenna or dielectric resonator type, and method of producing such an antenna
Antenna of a dielectric resonator type, which is suitable for incorporation in a router, a laptop, a tablet computer or a similar electronic device, the antenna comprising a basic structure which includes:Antenna or a dielectric resonator type, which is suitable for incorporation into a router, a laptop, a tablet computer or a similar electronic device, the antenna including a basic structure which includes:
i) A support body made from a dielectric material which has a relatively high dielectric constant;i) A support body made from a dielectric material which has a relatively high dielectric constant;
ii) At least one surface layer provided on the outer surface of the support body, which surface layer includes a polymeric composition which is metallizable by exposure to electromagnetic radiation and subsequent reductive metal coating;ii) At least one surface layer provided on the outer surface of the support body, which surface layer includes a polymeric composition which is metallizable by exposure to electromagnetic radiation and subsequent reductive metal coating;
wherein the at least one surface layer contains an electric circuitry constituted by the polymeric composition in the metallized state, wherein the electric circuitry comprises the electrically conductive parts of an antenna unit, which parts include: a ground plane and an antenna element.that is at least one surface layer contains an electric circuitry constituted by the polymeric composition in the metallized state, the electric circuitry comprises the electrically conductive parts of an antenna unit, which parts include: a ground plane and an antenna element.
Method for producing an antenna of a dielectric resonator type.Method for producing an antenna or dielectric resonator type.
NL B1 2019257NL B1 2019257
Dit octrooi is verleend ongeacht het bijgevoegde resultaat van het onderzoek naar de stand van de techniek en schriftelijke opinie. Het octrooischrift komt overeen met de oorspronkelijk ingediende stukken.This patent has been granted regardless of the attached result of the research into the state of the art and written opinion. The patent corresponds to the documents originally submitted.
Antenna of a dielectric resonator type, and method of producing such an antennaAntenna or dielectric resonator type, and method of producing such an antenna
The present invention relates to an antenna of a dielectric resonator type, which is suitable for incorporation in a router, a laptop, a tablet computer or a similar electronic device.The present invention relates to an antenna or a dielectric resonator type, which is suitable for incorporation into a router, a laptop, a tablet computer or a similar electronic device.
Furthermore, the invention relates to a method of producing such an antenna, an intermediate basic structure suitable for such a method, and a method of producing the latter.Furthermore, the invention relates to a method of producing such an antenna, an intermediate basic structure suitable for such a method, and a method of producing the latter.
In this field of technology, a dielectric resonator (DR) antenna is a radio antenna suitable for microwave frequencies and higher, that is based on a body of a material with suitable dielectric properties which constitutes a dielectric resonator, which body is mounted on a metal surface acting as a ground plane for the antenna. Radio waves are introduced from a transmitter circuit into the resonator material and bounce back and forth between the resonator walls, forming standing waves. The walls of the resonator are partially transparent to radio waves, allowing them to radiate into space.In this field of technology, a dielectric resonator (DR) antenna is a radio antenna suitable for microwave frequencies and higher, that is based on a body of a material with suitable dielectric properties which is a dielectric resonator, which body is mounted on a metal surface acting as a ground plane for the antenna. Radio waves are introduced from a transmitter circuit into the resonator material and bounce back and forth between the resonator walls, forming standing waves. The walls of the resonator are partially transparent to radio waves, allowing them to radiate into space.
The manufacture of this type of DR-antenna typically starts with the production of a starting material in the form of a single solid body by injection moulding a suitable polymeric composition. To be suitable for a DR-antenna, the polymeric composition should have dielectric properties and be metallizable. Accordingly, the composition contains a special additive in the form of an organic metal complex, which can be metallized by a physico-chemical reaction induced by the focused laser beam.The manufacture of this type of DR antenna typically starts with the production of a starting material in the form of a single solid body by injection molding a suitable polymeric composition. To be suitable for a DR-antenna, the polymeric composition should have dielectric properties and be metallizable. Considering the composition contains a special additive in the form of an organic metal complex, which can be metallized by a physico-chemical reaction induced by the focused laser beam.
In order to form conductive tracks on the dielectric body, pre-determined parts of the outer surface are exposed to electromagnetic radiation, which breaks off the metal atoms from the organic ligands. These metal atoms then act as nuclei for a subsequent step of reductive copper coating, wherein the final conductive tracks are created. This process is well known in the art, and is for instance described in PCT application WO 03/005784 A2.In order to form conductive tracks on the dielectric body, pre-determined parts of the outer surface are exposed to electromagnetic radiation, which breaks off the metal atoms from the organic ligands. These metal atoms then act as nuclei for a subsequent step or reductive copper coating, the final conductive tracks are created. This process is well known in the art, and is described for instance in PCT application WO 03/005784 A2.
The internal part of the solid body that is not metallized will function as a dielectric resonator.The internal part of the solid body is not a metallized will function as a dielectric resonator.
The formed electric circuitry on the outer surface constitutes the electrically conductive parts of an antenna unit, which parts include a ground plane, and an antenna element.The formed electric circuitry on the outer surface includes the electrically conductive parts of an antenna unit, which parts include a ground plane and an antenna element.
A DR-antenna that is formed in this way is commonly referred to as a moulded interconnect device (MID), which term refers to an injection-moulded thermoplastic article with integrated electronic circuitry. The production of an MID is thus based on the use of thermoplastics which are suitable for a subsequent selective metallization after exposure to specific radiation, e.g. by a technique known as Laser Direct Structuring..A DR antenna that is formed in this way is commonly referred to as a molded interconnect device (MID), which term refers to an injection-molded thermoplastic article with integrated electronic circuitry. The production of an MID is thus based on the use of thermoplastics which are suitable for a subsequent selective metallization after exposure to specific radiation, e.g. by a technique known as Laser Direct Structuring.
As the manufacture of such a DR-antenna starts from a single basic body, it is required that the basic body is made from a specific polymeric composition that has both adequate dielectric properties and metallizable properties. In practice, such a polymeric composition necessitates that at least the following ingredients are included:As the manufacture of such a DR-antenna starts from a single basic body, it is required that the basic body is made from a specific polymeric composition that has both adequate dielectric properties and metallizable properties. In practice, such a polymeric composition necessities that at least the following ingredients are included:
- a polymeric compound;- a polymeric compound;
- a mineral filler for adjusting the dielectric constant;- a mineral filler for adjusting the dielectric constant;
- an organo-metallic complex that can be activated by a focused laser beam.- an organo-metallic complex that can be activated by a focused laser beam.
Examples of such polymeric compositions are described in European Patent EP 2291444B1.Examples of such polymeric compositions are described in European Patent EP 2291444B1.
A drawback from the above polymeric composition is that the necessary inclusion of all the above ingredients may compromise the mechanical properties of the basic structure itself. In addition, the mineral filler may have a negative impact on the laser activation of the organo-metallic complex. Furthermore, it was found that in many instances the polymeric composition was not satisfactorily suitable for injection moulding techniques and required the inclusion of further additional compounds, which could further compromise fundamental properties of the antenna.A drawback from the above polymeric composition is that the necessary inclusion of all the above ingredients may compromise the mechanical properties of the basic structure itself. In addition, the mineral filler may have a negative impact on the laser activation or the organo-metallic complex. Furthermore, it was found that in many instances the polymeric composition was not satisfactorily suitable for injection molding techniques and required the inclusion of further additional compounds, which could further compromise fundamental properties of the antenna.
The objective of the present invention is to minimize or eliminate the above drawbacks relating to a DR-antenna as proposed in the prior art.The objective of the present invention is to minimize or eliminate the above drawbacks related to a DR-antenna as proposed in the prior art.
The above objective is achieved by the first aspect of the invention, which pertains to:The above objective is achieved by the first aspect of the invention, which pertains to:
an antenna of a dielectric resonator type, which is suitable for incorporation in a router, a laptop, a tablet computer or a similar electronic device, the antenna comprising a basic structure which includes:an antenna or a dielectric resonator type, which is suitable for incorporation into a router, a laptop, a tablet computer or a similar electronic device, the antenna including a basic structure which includes:
i) a support body made from a dielectric material which has a relatively high dielectric constant;i) a support body made from a dielectric material which has a relatively high dielectric constant;
ii) at least one surface layer provided on the outer surface of the support body, wherein the surface layer is made from a polymeric composition which is metallizable by exposure to electromagnetic radiation and subsequent reductive copper coating, wherein the at least one surface layer contains an electric circuitry constituted by the polymeric composition in a metallized state, and wherein the electric circuitry comprises the electrically conductive parts of an antenna unit, which parts include a ground plane, and an antenna element.ii) at least one surface layer provided on the outer surface of the support body, the surface layer is made from a polymeric composition which is metallizable by exposure to electromagnetic radiation and subsequent reductive copper coating, the least one surface layer contains an electric circuitry constituted by the polymeric composition in a metallized state, and the electric circuitry comprises the electrically conductive parts or an antenna unit, which parts include a ground plane, and an antenna element.
Such an antenna distinguishes itself from the prior art, by having two distinct components which are a support body and a surface layer, each of which is dedicated to fulfil two distinct functions in the DR-antenna: the support body functions as a dielectric resonator, while the metal paths on the surface layer function as the antenna unit itself. The basic structure thus allows for an optimum choice of material for each component in view of their different, intended functionality.Such an antenna distinguishes itself from the prior art, by having two distinct components which are a support body and a surface layer, each or which is dedicated to fulfill two distinct functions in the DR-antenna: the support body functions as a dielectric resonator, while the metal paths on the surface layer function as the antenna unit itself. The basic structure thus allows for an optimum choice of material for each component in view or their different, intended functionality.
Consequently, the mechanical properties of the antenna do not have to be compromised such as in the antenna from a single basic structure as proposed in the prior art.Yield, the mechanical properties of the antenna do not have to be compromised such as in the antenna from a single basic structure as proposed in the prior art.
As such the antenna according to the invention has a basic structure which is mechanically robust to a more satisfactory degree, while the electric circuitry of the antenna unit does not have to be compromised by any additional requirements relating to the function of the support body itself.As such the antenna according to the invention has a basic structure which is mechanically robust to a more satisfactory degree, while the electric circuitry or the antenna unit does not have to be compromised by any additional requirements concerning the function of the support body itself.
In the context of the present invention, the antenna should be suitable for incorporation in a router, a laptop a tablet computer or a similar electronic device, which requires some degree of miniaturization.In the context of the present invention, the antenna should be suitable for incorporation into a router, a laptop or a tablet computer or a similar electronic device, which requires some degree of miniaturization.
From a practical viewpoint, it is useful that the antenna according to the invention contains a feed connector system that allows for an electrical connection to be made between an external feed line and the antenna unit.From a practical viewpoint, it is useful that the antenna according to the invention contains a feed connector system that allows for an electrical connection to be made between an external feed line and the antenna unit.
Furthermore, for its intended applications, it is preferred that the antenna is operative on a dual band frequency, more preferably at frequencies of approx. 2.5 GHz and approx. 5 GHz.Furthermore, for its intended applications, it is preferred that the antenna is operative on a dual band frequency, more preferably at frequencies or approx. 2.5 GHz and approx. 5 GHz.
In the present invention, the at least one surface layer may be provided directly or indirectly on the support body. For instance, the surface layer may be glued onto the support body using an intermediate adhesive layer. Alternatively, the two parts may be connected directly, as will be discussed in more detail below in regard of the preferred method of manufacturing.In the present invention, the at least one surface layer may be provided directly or indirectly on the support body. For instance, the surface layer may be glued onto the support body using an intermediate adhesive layer. Alternatively, the two parts may be connected directly, as will be discussed in more detail below in regard to the preferred method of manufacturing.
In the antenna according to the invention it is preferred that the dielectric material of the support body is virtually free from a compound, which is metallizable by exposure to electromagnetic radiation and subsequent reductive copper coating.In the antenna according to the invention it is preferred that the dielectric material or the support body is virtually free from a compound, which is metallizable by exposure to electromagnetic radiation and subsequent reductive copper coating.
Such a dielectric material is not compromised in terms of its dielectric constant, nor in terms of its mechanical properties.Such a dielectric material is not compromised in terms of its dielectric constant, nor in terms of its mechanical properties.
The dielectric material may include a high percentage of mineral fillers, such as titanium dioxide or barium titanates.The dielectric material may include a high percentage of mineral fillers, such as titanium dioxide or barium titanates.
A suitable dielectric material for the invention is an injection-mouldable polymer material with a dielectric constant (also referred to in the art as relative permittivity) above 3.0, preferably above 4.0, and a low dielectric loss (< 10 exp-2, preferred < 10 exp-3). Such dielectric materials are commercially available from various sources and are for example sold under the trade name „Preperm by Premix Oy in Finland.A suitable dielectric material for the invention is an injection-moldable polymer material with a dielectric constant above (also referred to in the art as relative permittivity) above 3.0, preferably above 4.0, and a low dielectric loss (<10 exp-2, preferred < 10 exp-3). Such dielectric materials are commercially available from various sources and are for example sold under the trade name “Preperm by Premix Oy in Finland.
With further preference, in the antenna according to the invention, the polymeric composition of the surface layer has preferably a lower dielectric constant than the support body.With further preference, in the antenna according to the invention, the polymeric composition or the surface layer preferably has a lower dielectric constant than the support body.
Such a surface layer can thus be made from any common polymeric compositions that are metallizable by exposure to electromagnetic radiation and subsequent reductive copper coating, without further requirements.Such a surface layer can thus be made from any common polymeric compositions that are metallizable by exposure to electromagnetic radiation and subsequent reductive copper coating, without further requirements.
In the invention, the surface layer preferably has a maximum thickness of 1 millimetre, as such is sufficient for its intended purpose of forming an antenna unit, while the thickness of such a surface layer does not substantially worsen the dielectric properties of the antenna as a whole.In the invention, the surface layer preferably has a maximum thickness of 1 millimeter, as such is sufficient for its intended purpose or forming an antenna unit, while the thickness or such a surface layer does not substantially become the dielectric properties of the antenna as a whole.
A suitable polymeric composition for the surface layer includes any injectionmouldable polymeric composition containing a compound, which is metallizable by exposure to electromagnetic radiation and subsequent reductive copper coating. This method of metallization is commonly referred to in the field as laser direct structuring (LDS).A suitable polymeric composition for the surface layer includes any injection moldable polymeric composition containing a compound, which is metallizable by exposure to electromagnetic radiation and subsequent reductive copper coating. This method of metallization is commonly referred to in the field as laser direct structuring (LDS).
Examples of metallizable polymeric composition that are commercially available are for instance given in the list of approved LDS materials provided by LPKF Laser & Electronics AG: http://www.lpkf.com/_mediafiles/2074-approved-plastics-lpkf-lds2017-02.pdf.Examples of metallizable polymeric composition that are commercially available are for instance given in the list of approved LDS materials provided by LPKF Laser & Electronics AG: http://www.lpkf.com/_mediafiles/2074-approved-plastics-lpkf-lds2017- 02.pdf.
In the context of the invention, the polymeric composition for the surface layer typically will include the following ingredients:In the context of the invention, the polymeric composition for the surface layer typically will include the following ingredients:
- a polymeric compound;- a polymeric compound;
- an organo-metallic complex that can be activated by a focused laser beam;- an organo-metallic complex that can be activated by a focused laser beam;
- additives and fillers to improve the processing properties.- additives and fillers to improve the processing properties.
With special preference, the antenna according to the invention comprises a multitude of surface layers, preferably two or three, which are provided on the outer surface of the support body in such a way that each surface layer is provided adjacent to another surface layer, wherein each surface layer is made from a polymeric composition which is metallizable by exposure to electromagnetic radiation and subsequent reductive copper coating, wherein each surface layer contains an electric circuitry constituted by the polymeric composition in a metallized state, and wherein the electric circuitry comprises the electrically conductive parts of an antenna unit, which parts include a ground plane, and an antenna element. Such an antenna contains multiple adjacent antenna units, which is highly useful for multiple-input multiple-output purposes. In practice, a number of two or three antenna units is most suitable in order to incorporate the whole antenna into the intended electronic device.With special preference, the antenna according to the invention comprises a multitude of surface layers, preferably two or three, which are provided on the outer surface or the support body in such a way that each surface layer is provided adjacent to another surface layer, each surface layer is made from a polymeric composition which is metallizable by exposure to electromagnetic radiation and subsequent reductive copper coating, each surface layer contains an electric circuitry constituted by the polymeric composition in a metallized state, and the electric circuitry comprises the electrically conductive parts of an antenna unit, which parts include a ground plane, and an antenna element. Such an antenna contains multiple adjacent antenna units, which is highly useful for multiple-input multiple-output purposes. In practice, a number of two or three antenna units is the most suitable in order to incorporate the whole antenna into the intended electronic device.
In a particularly preferred version of the antenna according to the invention, the basic structure of the support body (i) and the surface layer (ii) has been obtained by transfer injection moulding of two components.In a particularly preferred version of the antenna according to the invention, the basic structure of the support body (i) and the surface layer (ii) has been obtained by transfer injection molding or two components.
This technique of transfer injection moulding is based on two separate phases of injection moulding of an object, which comprises in the case of the antenna according to the invention:This technique of transfer injection molding is based on two separate phases or injection molding or an object, which comprises in the case of the antenna according to the invention:
injection moulding of a support body in a first mould, and subsequent removal of the support body from the first mould after hardening;injection molding or a support body in a first mold, and subsequent removal of the support body from the first mold after hardening;
positioning the support body in a second mould, and injection moulding at least one surface layer onto the support body.positioning the support body in a second mold, and injection molding at least one surface layer on the support body.
This technique is an economically viable method for forming a basic structure of two components, and also highly suitable for producing an antenna according to the invention. The technique allows for a direct attachment of the surface layer onto and around the support body, without the need for an intermediate adhesive layer.This technique is an economically viable method for forming a basic structure of two components, and also highly suitable for producing an antenna according to the invention. The technique allows for a direct attachment of the surface layer on and around the support body, without the need for an intermediate adhesive layer.
In another preferred embodiment of the antenna according to the invention, the surface layer covers a complete circumference of the support body.In another preferred embodiment of the antenna according to the invention, the surface layer covers a complete circumference of the support body.
Such a surface layer thus spans around the support body and is therefore less prone to delamination from the support body. This attractive effect is further enhanced, when the antenna is produced using the above injection moulding technique, because the surface layer provided on the support body forms a band that spans around it, which will shrink slightly during cooling off after the second step of injection moulding the surface layer(s). This shrinking effect tightens the grip of the band onto the support body, and further promotes the attachment of the surface layer onto the band.Such a surface layer thus spans around the support body and is therefore less prone to delamination from the support body. This attractive effect is further enhanced when the antenna is produced using the above injection molding technique, because the surface layer is provided on the support body forms a band that spans around it, which will shrink slightly during cooling off after the second step of injection molding the surface layer (s). This shrinking effect tightens the grip of the band onto the support body, and further promotes the attachment of the surface layer onto the band.
Preferably in the antenna according to invention, the support body comprises protruding notches which protrude beyond the outer circumference of the surface layer, and which preferably protrude through the surface layer.Preferably in the antenna according to invention, the support body comprises protruding notches which protrude beyond the outer circumference of the surface layer, and which preferably protrude through the surface layer.
This preferred feature is especially useful when the antenna is made by the above transfer injection moulding technique: By virtue of these notches, the first formed support body can be positioned securely in a fixed position in the second mould, since the notches are dimensioned to abut against the inner walls of the second mould. As a result, no bending or deformation of the support body will occur during the second injection moulding step wherein the surface layers are formed onto the support body, assuring a defined thickness of the surface layer.This preferred feature is especially useful when the antenna is made by the above transfer injection molding technique: By virtue of these notches, the first formed support body can be securely positioned in a fixed position in the second mold, since the notches are dimensioned to abut against the inner walls or the second mold. As a result, no bending or deformation of the support body will occur during the second injection molding step on the surface layers are formed on the support body, assuring a defined thickness of the surface layer.
It is further preferred in the antenna according to the invention, that the electric circuitry has been produced by laser direct structuring (LDS) of the polymeric composition and subsequent reductive copper coatingIt is further preferred in the antenna according to the invention, that the electric circuitry has been produced by laser direct structuring (LDS) or the polymeric composition and subsequent reductive copper coating
The LDS technique is preferred in this context, as it allows for producing a reliable antenna unit as the conductive circuitry formed by LDS offers an excellent solderability for electrical connections, and allows for an extensive variation and extreme precision in thickness of the electric circuitry formed.The LDS technique is preferred in this context, as it allows for producing a reliable antenna unit as the conductive circuitry formed by LDS offers an excellent solderability for electrical connections, and allows for extensive variation and extreme precision in thickness of the electric circuitry formed.
In a second aspect, the invention pertains to: A method for producing an antenna of a dielectric resonator type, which comprises the steps of:In a second aspect, the invention pertains to: A method for producing an antenna or a dielectric resonator type, which comprises the steps of:
injection moulding of a support body in a first mould, and subsequent removal of the support body from the first mould after hardening; positioning the support body in a second mould, and injection moulding at least one surface layer onto the support body;injection molding or a support body in a first mold, and subsequent removal of the support body from the first mold after hardening; positioning the support body in a second mold, and injection molding at least one surface layer onto the support body;
wherein the support body is made from a dielectric material which has a relatively high dielectric constant;the support body is made from a dielectric material which has a relatively high dielectric constant;
and wherein the surface layer is made from a polymeric composition which is metallizable by exposure to electromagnetic radiation and subsequent reductive metal coating.The surface layer is made from a polymeric composition which is metallizable by exposure to electromagnetic radiation and subsequent reductive metal coating.
This method is basically a transfer injection moulding process, as discussed above. Such a method produces an intermediate basic structure, of which the surface layers can subsequently be metallized by radiation and subsequent reductive metal coating in order to produce an antenna of a dielectric resonator type according to the first aspect of the invention. The method thereby allows for the production of a DR-antenna with improved properties as discussed above.This method is basically a transfer injection molding process, as discussed above. Such a method produces an intermediate basic structure, or which surface layers can be metalized by radiation and subsequent reductive metal coating in order to produce an antenna or a dielectric resonator type according to the first aspect of the invention. The method allows for the production of a DR-antenna with improved properties as discussed above.
It is preferred that in the method according to the second aspect of the invention, multiple surface layers are injection moulded onto the support body.It is preferred that in the method according to the second aspect of the invention, multiple surface layers are injection molded onto the support body.
As already explained in view of the antenna itself, it is preferred in the method of the invention, that the support body is provided with notches protruding from it, which are of sufficient size to protrude beyond the outer circumference of the surface layer that is injection moulded subsequently onto the support body. It is particularly preferred that such notches actually protrude through the surface layer that is formed on the support body.As already explained in view of the antenna itself, it is preferred in the method of the invention, that the support body is provided with notches protruding from it, which are sufficient size to protrude beyond the outer circumference or the surface layer that is injection molded subsequently onto the support body. It is particularly preferred that such notches actually protrude through the surface layer that is formed on the support body.
According to a third aspect, the invention pertains to:According to a third aspect, the invention pertains to:
An intermediate basic structure for producing an antenna of a dielectric resonator type, which comprises a support body and at least one surface layer injection moulded onto the support body, which are obtainable by the method according to the second aspect of the invention.An intermediate basic structure for producing an antenna or a dielectric resonator type, which comprises a support body and at least one surface layer injection molded onto the support body, which are available by the method according to the second aspect of the invention.
In a final and fourth aspect, the invention pertains to:In a final and fourth aspect, the invention pertains to:
A method of producing an antenna of a dielectric resonator type, which comprises the steps of:A method of producing an antenna or a dielectric resonator type, which comprises the steps of:
providing an intermediate basic structure according to the third aspect, metallizing the at least one surface layer of the intermediate basic structure using laser direct structuring and subsequent reductive metal coating, such that the metallized polymeric composition of the surface layer constitutes an electric circuitry which comprises the electrically conductive parts of an antenna unit, which parts include a ground plane, and an antenna element.providing an intermediate basic structure according to the third aspect, metallizing the least one surface layer of the intermediate basic structure using laser direct structuring and subsequent reductive metal coating, such that the metallized polymeric composition or the surface layer is an electric circuitry which comprises the electrically conductive parts or an antenna unit, which parts include a ground plane, and an antenna element.
The advantages of such a method are already explained in detail above, and therefore referred to.The advantages of such a method are already explained in detail above, and therefore referred to.
The invention is further explained by reference to the appended figures, wherein:The invention is further explained by reference to the appended figures,
- Figure 1 is an overview of a preferred embodiment of the DR-antenna according to the invention;- Figure 1 is an overview of a preferred embodiment of the DR antenna according to the invention;
Figure 2A and 2B are two cross-sectional views on the DR-antenna of fig. 1.Figure 2A and 2B are two cross-sectional views on the DR antenna or Figure 1.
Figure 1 shows a DR-antenna 1, which consists of a rod-shaped support body 4, on which three surface layers 6 are applied adjacent to each other. Some upper parts of the surface layers are metallized thus forming an electric circuitry 8. The shown metallized parts 8 of each surface layer 6 form an antenna element, capable of sending and receiving EM-signals. Opposite of each antenna element 8 (and therefore not visible in fig.1), are ground planes that are formed by metallizing the major part of the bottom side of each surface layer. In each surface layer 6, some protruding notches 12 which are part of the support body 1, protrude beyond the upper surface of the surface layer.Figure 1 shows a DR antenna 1, which consists of a rod-shaped support body 4, on which three surface layers 6 are applied adjacent to each other. Some upper parts of the surface layers are metallized thus forming an electric circuitry 8. The shown metallized parts 8 or each surface layer 6 form an antenna element, capable of sending and receiving EM signals. Opposite or each antenna element 8 (and therefore not visible in Figure 1), are ground planes that are formed by metallizing the major part of the bottom side of each surface layer. In each surface layer 6, some protruding notches 12 which are part of the support body 1, protrude beyond the upper surface or the surface layer.
Figure 2A shows a first transversal cross section of the support body 4, at a notch 12 which protrudes outside the surface layer 4, of which no metallized parts 8 are shown for reasons of simplicity.Figure 2A shows a first transversal cross section of the support body 4, at a notch 12 which protrudes outside the surface layer 4, or which no metallized parts are shown for reasons of simplicity.
Figure 2B shows a second transversal cross section of the support body 4, that is not provided with a notch as in fig. 2A. The surface layer 6 herein spans around the support body 4, thus covering a complete circumference of the support body.Figure 2B shows a second transversal cross section of the support body 4, which is not provided with a notch as in Fig. 2A. The surface layer 6 reads spans around the support body 4, thus covering a complete circumference of the support body.
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| NL (1) | NL2019257B1 (en) |
Citations (4)
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|---|---|---|---|---|
| US20090174612A1 (en) * | 2008-01-04 | 2009-07-09 | Enrique Ayala | Antennas and antenna carrier structures for electronic devices |
| CN202210572U (en) * | 2011-08-18 | 2012-05-02 | 佳邦科技股份有限公司 | Composite antenna structure |
| KR20160145347A (en) * | 2015-06-10 | 2016-12-20 | 에스케이씨 주식회사 | Conductive pattern structure and preparation method thereof |
| WO2017061869A1 (en) * | 2015-10-09 | 2017-04-13 | The Antenna Company International N.V. | Antenna suitable for integration in a laptop or tablet computer |
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| US20090174612A1 (en) * | 2008-01-04 | 2009-07-09 | Enrique Ayala | Antennas and antenna carrier structures for electronic devices |
| CN202210572U (en) * | 2011-08-18 | 2012-05-02 | 佳邦科技股份有限公司 | Composite antenna structure |
| KR20160145347A (en) * | 2015-06-10 | 2016-12-20 | 에스케이씨 주식회사 | Conductive pattern structure and preparation method thereof |
| WO2017061869A1 (en) * | 2015-10-09 | 2017-04-13 | The Antenna Company International N.V. | Antenna suitable for integration in a laptop or tablet computer |
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| Title |
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| CHOU MIN-CHIEH ET AL: "Novel laser induced metallization technologies for compact antenna designs in mobile phones", 2016 IEEE 5TH ASIA-PACIFIC CONFERENCE ON ANTENNAS AND PROPAGATION (APCAP), IEEE, 26 July 2016 (2016-07-26), pages 443 - 444, XP033057979, DOI: 10.1109/APCAP.2016.7843282 * |
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