EP1751820A1 - Planar antenna provided with conductive studs above a ground plane and/or with at least one radiator element, and corresponding production method - Google Patents
Planar antenna provided with conductive studs above a ground plane and/or with at least one radiator element, and corresponding production methodInfo
- Publication number
- EP1751820A1 EP1751820A1 EP05759955A EP05759955A EP1751820A1 EP 1751820 A1 EP1751820 A1 EP 1751820A1 EP 05759955 A EP05759955 A EP 05759955A EP 05759955 A EP05759955 A EP 05759955A EP 1751820 A1 EP1751820 A1 EP 1751820A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radiating element
- radiating
- ground plane
- conductive
- conductive pads
- 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
-
- 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
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
Definitions
- the field of the invention is that of planar antennas, of the type comprising at least one radiating element (also called "patch", planar pattern, radiating pattern or printed pattern) separated from a ground plane by a dielectric.
- radiating element also called "patch", planar pattern, radiating pattern or printed pattern
- Today is experiencing a considerable development of mobile networks and, more generally, of all "wireless” networks.
- these systems provide attractive responses on many points, such as connection flexibility, mobility, redeployment or the possibility of extending networks, this growth should continue to increase very significantly in the future.
- the radiating elements are part of the key components, for which the requested specifications are increasingly restrictive. It is of course constantly necessary to optimize all of the electrical performance of these antennas, but also to satisfy increasingly critical criteria, such as the size, the weight or the cost of these components.
- planar antennas In accordance with an abuse of language quite conventional in the field of antennas, the term "planar antennas" (or antennas produced according to planar technology): both the really planar antennas, that is to say those whose ground plane and the radiating element or elements are planar, as well as the not really planar antennas, that is to say those whose ground plane and / or at least one of the radiating elements is (are) not planar (s) but shaped (s) according to a determined three-dimensional (3D) shape, so as to match the shape of a support.
- Planar antennas of the second category mentioned above are generally, but not necessarily, produced using printed technology.
- planar antenna This explains why, historically, the adjective "planar” was chosen in the expression “planar antenna”, to show an opposition with the traditional antenna structure based on three-dimensional (3D) waveguide.
- the present invention fits into this context and relates more specifically to an original planar antenna solution in the above sense, as well as to a corresponding manufacturing process, making it possible to greatly reduce the physical dimension of the basic printed pattern (that is to say say radiant element (s), also called patches). 2.
- radiant element (s) also called patches.
- the reduction in the size of planar antennas represents a major challenge for facilitating their use and their integration in modern systems.
- the basic principle of most of the solutions implemented to date consists in increasing the equivalent electrical length of the printed pattern, so that it can radiate at the desired frequency, while reducing its physical dimensions (ie its surface or its volume ).
- the most commonly used structures correspond to: solutions of the patch type with inscribed slots, these slots making it possible to lengthen the electrical path of the signal on the planar pattern (see for example patent documents WO 01/31739 and WO 01/17063), or solutions for which the radiating pattern is folded so as to gain in compactness (see for example patent documents WO 02/052680, WO 01/63695 and US 6,483,462 B2). It should be noted that these different concepts can also be combined within the same structure (see for example patent document WO 02/101874). 3.
- the object of the invention is in particular to provide a technique quite different from those used until today to increase the equivalent electrical length of the printed pattern (radiating element or patch) of the antenna, so as to obtain a very compact planar antenna.
- a complementary objective of the invention is to provide such a technique which is simple to implement and inexpensive.
- the invention also aims to provide such a technique which can be applied to any type of planar radiating structures, such as the basic antennas "half-wave patches" or “quarter-wave patches”, the antennas “annular patches” , antennas “patches with registered slots”, PIFA antennas (Planar Inverted-F Antenna) ...
- Another objective of the invention is to provide such a technique which can be applied both to a planar antenna with a single radiating element than a planar antenna comprising a superposition of several radiating elements.
- Yet another objective of the invention is to provide a method of manufacturing a corresponding planar antenna, based on very simple integration technologies, which makes it possible to achieve very low cost solutions, perfectly suited to development. consumer markets.
- the antenna further comprises at least one set of conductive pads connected to and extending from at least one of the elements belonging to the group comprising the ground plane and said at least one radiating element, of so as to reduce at least one physical dimension of said at least one radiating element for a determined resonant frequency.
- the general principle of the invention therefore simply consists in placing the pads on the ground plane and / or on one or more radiating element (s) (patch (s)) of the planar antenna.
- plot is used in a generic sense, which can be declined in different variants (and in particular but not exclusively, as detailed in the description below, in the form of a projection, hole or else tab).
- dielectric is meant air or a solid material with characteristics close to those of air, such as, for example, plastic, foam, etc. materials.
- these studs come locally to modify the distribution of the electromagnetic field, and make it possible to reduce at least one physical dimension (the length and / or the width) of the radiating element (s) for a fixed resonant frequency.
- the present invention applies with an antenna structure comprising a single radiating element or with an antenna structure comprising a superposition of several radiating elements.
- the antenna comprises a first set of conductive pads connected to the ground plane and extending towards, without being connected to, said at least one radiating element.
- the antenna is of the type comprising a single radiating element, it advantageously comprises a second set of conductive pads connected to said single radiating element and extending towards, without being connected to, said ground plane.
- the antenna advantageously comprises a third set of conductive pads connected to a first face of said primary radiating element and extending towards, without being connected to, said ground plane.
- the antenna advantageously comprises a fourth set of conductive pads connected to a second face of said primary radiating element and extending towards, without being connected to, another of said radiating elements.
- the antenna advantageously comprises, for at least one of the intermediate radiating elements, a fifth set of conductive pads connected to a first face of said intermediate radiating element and extending towards, without being connected to, another of said radiating elements which follows said intermediate radiating element along a direction of travel of said superposition of the primary radiating element towards the upper radiating element.
- the antenna advantageously comprises, for at least one of the intermediate radiating elements, a sixth set of conductive pads connected to a second face of said intermediate radiating element and extending towards, without being connected to, another of said radiating elements which precedes said intermediate radiating element in a direction of travel from said superposition of the primary radiating element towards the upper radiating element.
- the antenna advantageously comprises a seventh set of conductive pads connected to a first face of said upper radiating element and extending towards, without being connected to, another of said radiating elements which precedes said upper radiating element along a direction of travel of said superposition of the primary radiating element towards the upper radiating element.
- a set of conductive pads extending from the ground plane or respectively from one of the radiating elements, are intertwined with another set of conductive pads, extending from one of the radiating elements. or respectively of another of the radiating elements.
- said radiating element is not connected to any conductive pad in an area where said radiating element is connected with supply means.
- the conductive pads of the same set of conductive pads are distributed in a matrix.
- at least one radiating element to which is connected at least one set of conductive pads is of the type having symmetry along its two main axes, and in that said conductive pads are distributed in an arrangement respecting said symmetry.
- the antenna belongs to the group comprising: planar antennas of the half-wave radiating element type, planar antennas of the quarter-wave radiating element type, planar antennas of the annular radiating element type, planar antennas of the radiating element type with inscribed slots, planar antennas of the radiating element type in inverted F.
- the antenna belongs to the group comprising: planar antennas and non-planar antennas due to a non-flatness of the ground plane and / or at least one of the radiating elements.
- at least one of the conductive pads connected to the ground plane or to one of the radiating elements is a conductive projection formed in a first conductive part and extending from a main body of said first conductive part, said main body forming said ground plane or said radiating element.
- At least one of the conductive pads connected to at least one of the radiating elements is a conductive tab, cut from at least one eccentric part of a second conductive part and folded relative to a central part of the second conductive part, said central part forming said radiating element.
- the antenna further comprises at least one support element for said first or second conductive part, made of a dielectric material and making it possible to position the ground plane relative to at least one of the radiating elements or to position said radiating element with respect to the ground plane or at least one other of the radiating elements.
- At least one of the conductive pads connected to the ground plane or to at least one of the radiating elements is a conductive hole extending from a first face of a layer of dielectric material, said first face carrying said ground plane or said at least one radiating element, said conductive hole extending from said first face and not opening onto a second face of said layer of dielectric material, the surface of said hole conductor being covered with a conductive material.
- the invention also relates to a method of manufacturing a planar antenna of the type comprising at least one radiating element separated from a ground plane by a dielectric.
- the method comprises a step of producing at least one set of conductive pads connected to and extending from at least one of the elements belonging to the group comprising the ground plane and said at least one radiating element, so as to reduce at least one physical dimension of said at least one radiating element for a determined resonant frequency.
- the method comprises the following step, for the ground plane and / or at least one of the radiating elements to which a set of conductive pads is connected: a first conductive part is produced comprising : a main body forming said ground plane or said radiating element; and at least one conductive projection extending from said main body, so as to form one of the conductive pads connected to the ground plane or to one of the radiating elements.
- the method comprises the following steps, for at least one of the radiating elements to which a set of conductive studs is connected: a second conductive part is produced comprising a central part forming said radiating element; cutting at least one conductive tab in an eccentric part of said second conductive part; said at least one conductive tab is folded relative to the central part, so as to form one of the conductive pads connected to one of the radiating elements.
- the method further comprises a step of positioning said first or second conductive part with respect to another element of the antenna, using at least one support element made of a dielectric material.
- the method comprises the following steps, for the ground plane and / or at least one of the radiating elements to which a set of conductive pads is connected: at least one hole is made in a layer of dielectric material, said at least one hole extending from a first face of said layer and not opening onto a second face of said layer; we selectively cover, with a conductive material: * at least part of said first face, so as to form said ground plane or said radiating element; and * the surface of said at least one hole, so as to obtain a conductive hole forming one of the conductive pads connected to the ground plane or to one of the radiating elements.
- FIG. 1 presents a perspective view of an example of a planar antenna of the half-wave patch type according to the invention, with studs distributed under the radiating element;
- Figure 2 is a sectional view of the antenna of Figure 1 along the axis B-B ';
- the upper part of FIG. 3 is a sectional view of the antenna of FIG. 1 along the axis AA ′, making it possible to interpret the effect of the studs positioned under the radiating element, and the lower part of Figure 3 is an electrical modeling of the effect of the pads;
- FIG. 1 presents a perspective view of an example of a planar antenna of the half-wave patch type according to the invention, with studs distributed under the radiating element;
- Figure 2 is a sectional view of the antenna of Figure 1 along the axis B-B ';
- the upper part of FIG. 3 is a sectional view of the antenna of FIG. 1 along the axis AA ′, making it possible to interpret the effect of the studs positioned under the
- FIG. 4 shows an example of a planar antenna of the quarter-wave patch type according to the invention, with studs distributed under the radiating element
- FIG. 5 shows an example of a planar antenna of the annular patch type according to the invention, with studs distributed under the radiating element
- FIG. 6 shows an example of an antenna obtained with a first embodiment of the method of manufacturing the antenna according to the invention, based on the use of a three-dimensional (3D) metal part and positioning supports
- FIG. 7 shows an example of an antenna obtained with a second embodiment of the method of manufacturing the antenna according to the invention, based on the use of a layer of dielectric substrate having non-opening metallized holes
- FIG. 8 illustrates experimental results of a planar antenna of the half-wave patch type according to the invention, obtained with the second embodiment of the method of manufacturing the antenna according to the invention
- FIG. 9 illustrates experimental results of a planar antenna of the conventional half-wave patch type, and of dimensions identical to that of the antenna according to the invention, the results of which are illustrated in FIG. 8
- FIG. 10 illustrates experimental results of a planar antenna of the quarter-wave patch type according to the invention, obtained with the second embodiment of the method of manufacturing the antenna according to the invention
- FIG. 11 illustrates experimental results of a planar antenna of the conventional quarter-wave patch type, and of dimensions identical to that of the antenna according to the invention, the results of which are illustrated in FIG.
- Figure 12 is a sectional view of an antenna configuration with two stacked radiating elements, according to the invention
- Figure 13 is a sectional view of an alternative antenna to a radiating element according to the invention, in which the ground plane and the underside of the single radiating element have conductive pads
- Figure 14 is a sectional view of an alternative antenna with two radiating elements according to the invention, in which the ground plane and the two faces of the primary radiating element have conductive pads
- Figure 15 is a sectional view of another alternative antenna to a radiating element according to the invention, in which the ground plane is flat and the single radiating element is shaped
- FIG. 16 is a sectional view of another variant of antenna with two radiating elements according to the invention, in which the ground plane and the two radiating elements are shaped;
- FIG. 17 presents a perspective view of another variant of an antenna with a radiating element according to the invention, with studs produced in the form of tongues distributed over the periphery of the radiating element;
- FIG. 18 is a sectional view of another variant of antenna with three radiating elements according to the invention, in which one face of the radiating element primary and the two faces of the intermediate radiating element have conductive pads. 6.
- a conventional planar antenna comprises at least one radiating element and a ground plane. At least one dielectric separates the radiating element closest to the ground plane and the ground plane itself, as well as the radiating elements therebetween.
- Dielectric is understood to mean air or a solid material having characteristics close to those of air, such as, for example, materials of the plastic, foam type, etc.
- FIG. 1 presents a perspective view of an example of a planar antenna of the half-wave patch type according to the invention, with studs distributed only under the radiating element. These pads 4 are connected to the radiating element 1 and extend towards the ground plane 2 without being connected to it.
- the antenna is modeled by two radiating slots 5, located at the two ends separated by the half-wave length (FIG. 3).
- the pads are for example distributed according to a spatial distribution, called a matrix, as illustrated in FIG. 2. which is a sectional view of the antenna of FIG. 1 along the axis B-B '. This distribution can be uniform or not. In general, any type of arrangement of the studs can be envisaged, without departing from the scope of the present invention.
- the upper part of Figure 3 is a sectional view of the antenna of Figure 1 along the axis A-A ', to interpret the effect of the studs positioned under the element beaming.
- the distribution of the electric field between the radiating element 1 and the ground plane 2 is represented by dotted arrows.
- the lower part of FIG. 3 is an electrical modeling of the effect of the pads 4 positioned under the radiating element 1.
- the pads are distributed in an arrangement respecting this symmetry. It is therefore quite possible to operate the antenna according to two crossed linear polarizations, even in circular polarization. The solution developed, based on studs, is therefore not in itself an obstacle to the use of the antenna for any type of desired polarization.
- FIGS. 4 and 5 two other examples of planar antennas with studs according to the invention are given in FIGS. 4 and 5: it is a planar antenna of the quarter-wave patch type, with ground return ( referenced 6) located on one of the edges of the support 3 (FIG. 4), as well as of a planar antenna of the annular patch type (FIG. 5).
- Concerning the concrete realization of the planar antennas with studs according to the invention several simple manufacturing methods can be envisaged, this simplicity being a fundamental criterion for reducing in particular the cost of these components.
- FIG. 6 a first embodiment of the antenna manufacturing method according to the invention.
- the radiating element (patch) 1 and the studs 4 are produced in a single conductive part 7 (for example a metal part), obtained by machining, by stamping or any other method of manufacturing metal parts. dimensional.
- the main body of the conductive part 7 forms the radiating element 1
- the conductive studs 4 are conductive projections formed in the conductive part and which extend from the main body of this part.
- This part is then transferred to one or more support elements 8, making it possible to position it relative to the lower ground plane.
- a preferred solution consists in using at the support level 8 a dielectric material whose nature makes it close to air, so that this or these supports are as transparent as possible, from an electromagnetic point of view.
- FIG. 6 presents an example of antenna obtained with this first embodiment of the method of manufacturing antenna according to the invention, based on the use of a three-dimensional metal part 7 (integrating the radiating element 1 and the studs 4) and positioning supports 8.
- the dielectric 3 included in the space between the radiating element 1, on which the conductive pads 4 are connected, and the ground plane 2 is for example air.
- This second solution is much more consistent with the techniques for producing standard printed circuits. This involves drilling directly into the support substrate 3 of the antenna (which may be made of foam, plastic material, etc., i.e. a layer of dielectric material other than air), holes (vias) not through and selectively cover with a conductive material, the upper face of this substrate (so as to form the radiating element 1), as well as the inside of the holes extending from this upper face (so as to form the conductive pads 4).
- the conductive pads 4 are here produced in the form of conductive holes.
- the covering with a conductive material consists of metallization. This metallization can be carried out simply for example by depositing conductive paint or by electrochemical deposit. It is clear, however, that any technique known to a person skilled in the art can be used for covering with a conductive material.
- the conductive holes (vias) 4 have a similar effect to that of the conductive pads of the preceding solutions (conductive projections), hence the reduction in the size of the radiating element 1.
- This element (support substrate 3 the upper face of which carries the radiating element 1 and has a plurality of metallized holes 4) is then brought into contact, by its lower face, with a ground plane 2 to obtain the final structure of the antenna.
- a foam-type substrate which, as specified above, has electrical characteristics which are entirely suitable for making planar antennas and which, in addition, lends itself very easily to a three-dimensional conformation according to the desired shape.
- the support substrate is a plastic material, easily shaped by one of the known molding techniques.
- FIG. 7 shows an example of an antenna obtained with this second embodiment of the method of manufacturing the antenna according to the invention, based on the use of a dielectric substrate 3 whose upper face carries the radiating element 1 and presents a plurality of metallized holes forming conductive pads 4.
- FIG. 17 a third embodiment of the antenna manufacturing method according to the invention.
- the radiating element (patch) and the pads are produced in the following manner: a conducting part 171 (for example a metal foil) comprising a central part forming the radiating element 1 is produced; a plurality of conductive tabs are cut around the periphery of this conductive part (that is to say in eccentric parts of this part, adjacent to the central part); the conductive tabs are folded back, relative to the central part, so as to form conductive pads 4 connected to the radiating element 1. Once folded (for example orthogonally to the central part forming the radiating element), the conductive tabs 4 are for example positioned on the edges of a substrate forming a support element 170.
- FIG. 17 shows an example of antenna obtained with this third embodiment of the antenna manufacturing method according to the invention, based on the production of folded conductive tabs which form conductive studs 4.
- the positioning of the radiating element relative to the ground plane or vice versa is carried out using one or more supports which may be of the same style as those presented in FIG. 6.
- the support element is none other than a wafer of dielectric substrate 170 whose height is slightly greater higher than the tabs to avoid any contact between the tabs and the ground plane.
- a first prototype antenna according to the invention of the type of antenna presented in FIG. 7, was produced.
- FIG. 8 illustrates experimental results of this first prototype planar antenna according to the invention.
- the antenna was characterized by adaptation and transmission along the preferred axis of radiation.
- the measurement in transmission is based on the implementation of a simple link budget between the developed prototype and a reference antenna (in this case, a printed dipole). It should be noted that, since this link budget is not carried out in an anechoic chamber, the result presented only illustrates the radiation in a qualitative manner.
- a second prototype miniature antenna is a quarter-wave patch antenna, with ground feedback located on one of the sections support.
- This antenna was printed on a 25x25x 10mm substrate 3 and transferred to a ground plane of 100x100mm 2 .
- FIG. 10 illustrates experimental results of this second prototype planar antenna according to the invention.
- This second prototype was also characterized in adaptation and transmission. These results can be compared to those of a conventional quarter-wave patch type antenna, of geometry quite similar to that of the second prototype, except for the presence of non-through vias, and whose performance is given in the figure. he. As illustrated in these figures 10 and 11, there is again a clear shift towards the low frequencies for the antenna according to the invention (with non-through vias), hence the possibilities of significant reduction in the dimension of the radiant element (basic printed motif).
- the general principle of the invention (adding studs under the surface of a radiating element in order to reduce at least one physical dimension (length and / or width) for a fixed resonance frequency) can also be used.
- planar antennas with several stacked elements It will be recalled that such multi-element antennas are used for example for broadband applications or even multi-frequency applications.
- FIG. 12 shows a sectional view of an antenna configuration with two stacked radiating elements, according to the invention.
- This antenna comprises a primary radiating element 1, separated from the ground plane 2 by a first dielectric 3, and an upper radiating element 10, separated from the primary radiating element 1 by a second dielectric 9.
- the primary radiating element is defined as being the radiating element closest to the ground plane.
- the upper radiating element is defined as being the radiating element furthest from the ground plane.
- the concept of miniaturization according to the invention is only applied to the primary radiating element 1.
- the upper radiating element 10 is not connected to any stud .
- the antenna can include any number of superimposed radiating elements and the concept of the invention (addition of conductive pads) can be applied to all the radiating elements of the superposition or to only one or more d 'between them.
- the concept of the invention (addition of conductive studs) can also be applied to the ground plane (addition of studs on its face situated on the side of the radiating element (s)), independently or in combination with an application to one or more radiating elements.
- the following different cases can be envisaged in the context of the present invention: only the ground plane has conductive pads; only one or more radiating element (s) present (s) conductive pads; the ground plane and one or more radiating element (s) have conductive pads.
- FIG. 13 is a sectional view of an alternative antenna to a radiating element according to the invention.
- the ground plane 132 has conductive pads 135.
- the underside of the single radiating element 131 also has conductive pads 134.
- These two matrices are located in the area between the upper radiating element and the lower ground plane. To avoid any contact between the studs of the two matrices, the first studs are interlaced with the second studs.
- the reduction in the resonance frequency is then very significant: this frequency in fact goes from 2.634GHz for the conventional antenna to 1.225GHz for the antenna of the invention, resulting in a decrease of more than 53%. This therefore leads to possibilities of ultra miniaturization of the basic printed pattern.
- the concept of the invention (addition of conductive pads) can also be applied simultaneously to the two faces of the same radiating element (except for the last of the superposition, that is to say the one furthest from the ground plane).
- FIG. 14 is a sectional view of an alternative antenna according to the invention, comprising a ground plane 142 and two radiating elements 141, 147.
- the ground plane 142 has conductive pads 144.
- the upper radiating element 147 does not have a stud.
- the primary radiating element 141 has first conductive pads 146 on its lower face and second conductive pads 145 on its upper face.
- FIG. 18 is a sectional view of another variant of antenna according to the invention, comprising a ground plane 180 and three radiating elements: a primary radiating element 181 (see definition above), an upper radiating element 183 (see definition above) and an intermediate radiating element 182.
- An intermediate radiating element is defined as a radiating element placed between the element primary radiator and the upper radiating element.
- the ground plane 180 and the upper radiating element 183 do not have a stud.
- the primary radiating element 181 has conductive pads 184 on its underside.
- the intermediate radiating element 182 has first conductive pads 185 on its lower face and second conductive pads 186 on its upper face. In general, the fact that the same radiating element has conductive pads on its two faces makes it possible to miniaturize the antenna even more. In the same antenna, it is of course possible to have several radiating elements having conductive pads on their two faces.
- FIG. 15 is a sectional view of another alternative antenna according to the invention, comprising a flat ground plane 152 and a radiating element 151 which has conductive pads 154 and is shaped (that is to say has a non-planar three-dimensional shape).
- Figure 16 is a sectional view of another alternative antenna according to the invention, comprising: a ground plane 162 which has conductive pads 164 and is shaped; and two radiating elements 161, 167, which each have conductive pads 165, 166 and which are shaped.
- the radiating element referenced 161, comprised between the upper radiating element 167 and the ground plane 162, is said to be primary radiating element.
- FIGS. 6, 7 and 17 three examples of manufacturing techniques applied to the manufacture of a radiating element having conductive pads.
- the conductive pads are conductive projections ( Figure 6).
- the conductive pads are conductive holes ( Figure 7).
- the conductive pads are conductive tabs ( Figure 17).
- the first and second techniques can be used to fabricate a ground plane comprising studs.
- the third technique tabs cannot be applied to the manufacture of a ground plane comprising conductive pads.
- the pads are made in the form of conductive holes
- the same layer of dielectric substrate can carry the ground plane (or a first radiating element) on its underside and a radiating element (or a second radiating element) on its upper face.
- the pads connected to the ground plane (or to the first radiating element) are produced in the form of first conductive holes which extend from the underside of the substrate layer and do not open onto the upper face of the layer of substrate.
- the studs connected to the radiating element are produced in the form of second conductive holes which extend from the upper face of the substrate layer and do not open onto the lower face of the layer of substrate.
- the aforementioned manufacturing techniques can be combined.
- a conductive part which comprises on the one hand conductive projections, forming first conductive pads and on the other hand folded conductive tabs, forming second conductive pads.
- the invention is not limited to the embodiments mentioned above. We can provide other variants which further minimize the size of the antenna by varying the number, size, shape and arrangement of the pads.
- the general principle of the present invention can be implemented in any field of application which can use a planar antenna (mobile applications, satellite communications applications, wireless RF applications, etc.) in very different frequency ranges (from a few hundred MHz to a few tens of GHz).
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Abstract
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Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0404679A FR2869726B1 (en) | 2004-04-30 | 2004-04-30 | PLATFORM ANTENNA WITH CONDUCTIVE PLATES EXTENDING FROM AT LEAST ONE RADIANT ELEMENT, AND METHOD OF MANUFACTURING THE SAME |
FR0502130A FR2869727B1 (en) | 2004-04-30 | 2005-03-02 | PLANAR ANTENNA HAVING CONDUCTIVE PLATES EXTENDING FROM THE MASS PLAN AND / OR AT LEAST ONE RADIANT ELEMENT, AND METHOD OF MANUFACTURING SAME |
PCT/FR2005/000966 WO2005117208A1 (en) | 2004-04-30 | 2005-04-19 | Planar antenna provided with conductive studs above a ground plane and/or with at least one radiator element, and corresponding production method |
Publications (2)
Publication Number | Publication Date |
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EP1751820A1 true EP1751820A1 (en) | 2007-02-14 |
EP1751820B1 EP1751820B1 (en) | 2011-05-18 |
Family
ID=34972405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05759955A Not-in-force EP1751820B1 (en) | 2004-04-30 | 2005-04-19 | Planar antenna provided with conductive studs above a ground plane and/or with at least one radiator element, and corresponding production method |
Country Status (7)
Country | Link |
---|---|
US (1) | US8077092B2 (en) |
EP (1) | EP1751820B1 (en) |
JP (1) | JP5122276B2 (en) |
KR (1) | KR101238576B1 (en) |
AT (1) | ATE510322T1 (en) |
FR (1) | FR2869727B1 (en) |
WO (1) | WO2005117208A1 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2869727B1 (en) * | 2004-04-30 | 2007-04-06 | Get Enst Bretagne Etablissemen | PLANAR ANTENNA HAVING CONDUCTIVE PLATES EXTENDING FROM THE MASS PLAN AND / OR AT LEAST ONE RADIANT ELEMENT, AND METHOD OF MANUFACTURING SAME |
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2005
- 2005-03-02 FR FR0502130A patent/FR2869727B1/en not_active Expired - Fee Related
- 2005-04-19 AT AT05759955T patent/ATE510322T1/en not_active IP Right Cessation
- 2005-04-19 US US11/579,078 patent/US8077092B2/en not_active Expired - Fee Related
- 2005-04-19 JP JP2007510070A patent/JP5122276B2/en not_active Expired - Fee Related
- 2005-04-19 EP EP05759955A patent/EP1751820B1/en not_active Not-in-force
- 2005-04-19 KR KR1020127005126A patent/KR101238576B1/en not_active IP Right Cessation
- 2005-04-19 WO PCT/FR2005/000966 patent/WO2005117208A1/en active Application Filing
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KR20120029482A (en) | 2012-03-26 |
JP5122276B2 (en) | 2013-01-16 |
KR101238576B1 (en) | 2013-02-28 |
ATE510322T1 (en) | 2011-06-15 |
WO2005117208A1 (en) | 2005-12-08 |
US8077092B2 (en) | 2011-12-13 |
JP2007535851A (en) | 2007-12-06 |
FR2869727B1 (en) | 2007-04-06 |
EP1751820B1 (en) | 2011-05-18 |
FR2869727A1 (en) | 2005-11-04 |
US20080198086A1 (en) | 2008-08-21 |
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