INSULATING GLAZING UNIT AND GLAZING

Abstract

An insulating glazing unit includes a spacer which is shaped around the periphery to form a spacer frame and delimits an inner region, a first glass pane, which is arranged on a pane contact surface of the spacer frame, and a second glass pane, which is arranged on a second pane contact surface of the spacer frame, and the glass panes project beyond the spacer frame and form an outer region, which is filled, at least in sections with a sealing element, wherein an RFID transponder is arranged in the outer region or in the outer edge region of the glass panes, and a strip-shaped coupling element is electromagnetically coupled to the RFID transponder.

Claims

1. An insulating glazing unit, comprising: at least one spacer which is shaped around a periphery to form a spacer frame and delimits an inner region, a first glass pane, which is arranged on a pane contact surface of the spacer frame, and a second glass pane, which is arranged on a second pane contact surface of the spacer frame, and the first and second glass panes project beyond the spacer frame, and an outer region is formed, which is filled, at least in sections with a sealing element, wherein at least one RFID transponder is arranged in the outer region or in an outer edge region of the first and second glass panes, a strip-shaped coupling element is electromagnetically coupled to the at least one RFID transponder, and the strip-shaped coupling element projects in sections beyond an end face of the insulating glazing unit along the first glass pane and/or along the second glass pane.

2. The insulating glazing unit according to claim 1, wherein the strip-shaped coupling element contains or is made of a metallized polymer film or a self-supporting metal foil.

3. The insulating glazing unit according to claim 2, wherein the metallization of the polymer film has a thickness of 10 μm to 200 μm and the metal foil has a thickness of 0.02 mm to 0.5 mm.

4. The insulating glazing unit according to claim 1, wherein the strip-shaped coupling element projects in sections beyond the end face of the insulating glazing unit along the first glass pane by an overhang U of 2 mm to 30 mm.

5. The insulating glazing unit according to claim 1, wherein the at least one RFID transponder is arranged in the outer region and directly on an outer surface of the spacer or on one of inner surfaces of the first and second glass panes or in a middle of the outer region.

6. The insulating glazing unit according to claim 1, wherein the at least one RFID transponder is arranged on an outer surface of one of the first and second glass panes at a distance of at most 10 mm from an adjacent end face of the respective glass pane and/or wherein the at least one RFID transponder is arranged on an end face of one of the first and second glass panes.

7. The insulating glazing unit according to claim 1, wherein the strip-shaped coupling element is arranged within the sealing element in the outer region, on an outer side of the outer region, on at least one end face of the first and second glass panes, and/or on an outer side of the first and second glass panes.

8. The insulating glazing unit according to claim 1, wherein a distance A between a dipole antenna of the at least one RFID transponder and the strip-shaped coupling element is from 0 mm to 10 mm.

9. The insulating glazing unit according to claim 1, wherein the strip-shaped coupling element is arranged in sections congruently over the at least one RFID transponder.

10. The insulating glazing unit according to claim 1, wherein the at least one RFID transponder includes or consists of a dipole antenna with a first antenna pole and a second antenna pole.

11. The insulating glazing unit according to claim 10, wherein the strip-shaped coupling element covers exactly one of the first and second antenna poles and projects beyond the one of the first and second antenna poles on the side facing away from the other one of the first and second antenna poles.

12. The insulating glazing unit according to claim 10, wherein one edge of the strip-shaped coupling element has, in the projection, an offset V from a center of the dipole antenna of −20% to +20% of a half wavelength lambda/2 of an operating frequency of the at least one RFID transponder.

13. The insulating glazing unit according to claim 10, wherein one edge of the strip-shaped coupling element has, in the projection, an offset V from a center of the dipole antenna at an operating frequency of the at least one RFID transponder in the UHF range of −30 mm to +30 mm.

14. The insulating glazing unit according to claim 1, wherein the strip-shaped coupling element has a length L parallel to a direction of extension of the dipole antenna greater than or equal to 40% of a half wavelength lambda/2 of an operating frequency of the dipole antenna.

15. The insulating glazing unit according to claim 1, wherein the strip-shaped coupling element has a length L parallel to a direction of extension of the dipole antenna greater than or equal to 7 cm.

16. A glazing, comprising: a frame consisting of a metal first frame element, a metal second frame element, and a polymeric third frame element connecting the metal first and second frame elements at least in sections, and an insulating glazing unit according to claim 1 arranged in the frame, wherein the strip-shaped coupling element is galvanically or capacitively coupled in at least one coupling region with one of the metal first and second frame elements.

17. The glazing according to claim 16, wherein the metal engages around the end faces of the insulating glazing unit and, at the same time, covers the at least one RFID transponder(s) in a through-vision direction through the first and second glass panes.

18. A method comprising identifying a glazing according to claim 16 with the at least one RFID transponder.

19. The insulating glazing unit according to claim 1, wherein the outer region is filled completely with the sealing element.

20. The insulating glazing unit according to claim 2, wherein the strip-shaped coupling element is made of aluminum, an aluminum alloy, copper, silver, or stainless steel.

Description

[0081] FIG. 1A a detailed view (cross-sectional representation) of an edge region of an insulating glazing unit in accordance with an embodiment of the invention,

[0082] FIG. 1B a plan view of an insulating glazing unit in accordance with the embodiment of the invention of FIG. 1A,

[0083] FIG. 10 a detailed view (cross-sectional representation) of an edge region of an insulating glazing unit in accordance with another embodiment of the invention,

[0084] FIG. 1D a detailed view (cross-sectional representation) of an edge region of an insulating glazing unit in accordance with another embodiment of the invention,

[0085] FIG. 1E a detailed view (cross-sectional representation) of an edge region of an insulating glazing unit in accordance with another embodiment of the invention,

[0086] FIG. 1F a detailed view (cross-sectional representation) of an edge region of an insulating glazing unit in accordance with another embodiment of the invention,

[0087] FIG. 1G a detailed view (cross-sectional representation) of an edge region of an insulating glazing unit in accordance with another embodiment of

[0088] FIG. 2A a detailed view (cross-sectional representation) of an edge region of a glazing with an insulating glazing unit in accordance with an embodiment of the invention,

[0089] FIG. 2B a detailed view (plan view) of a detail of the glazing with an insulating glazing unit of FIG. 2A,

[0090] FIG. 2C a detailed view (cross-sectional representation) of the glazing in a section plane parallel to the end face of the insulating glazing unit of FIG. 2A,

[0091] FIG. 3A a detailed view (cross-sectional representation) of an edge region of a glazing with an insulating glazing unit in accordance with another embodiment of the invention,

[0092] FIG. 3B a detailed view (cross-sectional representation) of the glazing in a section plane parallel to the end face of the insulating glazing unit of FIG. 3A, and

[0093] FIG. 4 a detailed view (cross-sectional representation) of a glazing in a section plane parallel to the end face of the insulating glazing unit in accordance with another embodiment.

[0094] In the figures as well as the following description, the insulating glazing units as well as the glazings and the individual components are in each case identified with the same or similar reference numbers regardless of the fact that the specific embodiments differ.

[0095] FIG. 1A depicts an edge region of an insulating glazing unit 1, in cross-section. The insulating glazing unit 1 comprises, in this embodiment, two glass panes 4a and 4b. These are held at a predetermined distance by a spacer 5 placed between the glass panes 4a, 4b near the end face 14 of the insulating glazing unit 1. The main body of the spacer 5 is made, for example, of glass-fiber-reinforced styrene acrylonitrile (SAN).

[0096] FIG. 1B depicts a schematic plan view of the insulating glazing unit 1 in a viewing direction indicated by the arrow A. FIG. 1B therefore depicts the second glass pane 4b lying on top.

[0097] Multiple spacers 5 (here, for example, four) are routed along the side edges of the glass panes 4a, 4b and form a spacer frame 5′. The pane contact surfaces 5.1, 5.2 of the spacers 5, i.e., the contact surfaces of the spacers 5 to the glass panes 4a, 4b, are bonded in each case to the glass panes 4a or 4b and thus mechanically fixed and sealed. The adhesive bond is made, for example, of polyisobutylene or butyl rubber. The inner surface 5.4 of the spacer frame 5′ delimits, together with the glass panes 4a, 4b, an inner region 12.

[0098] The spacer 5 is usually hollow (not shown) and filled with a desiccant (not shown), which binds, via small interior-side openings (likewise not shown), any moisture that has penetrated into the inner region 12. The desiccant contains, for example, molecular sieves such as natural and/or synthetic zeolites. The inner region 12 between the glass panes 4a and 4b is filled, for example, with a noble gas, such as argon.

[0099] The glass panes 4a, 4b usually project beyond the spacer frame 5′ on all sides such that the outer surface 5.3 of the spacer 5 and the outer sections of the glass panes 4a, 4b form an outer region 13. A sealing element (sealing profile) 6 is introduced into this outer region 13 of the insulating glazing unit 1 between the glass panes 4a and 4b and outside the spacer 5. This is shown here in simplified form as a single piece. In practice, it usually comprises two components, one of which seals the contact surface between the spacer 5 and the glass panes 4a, 4b and protects against penetrating moisture and external influences. The second component of the sealing element 6 additionally seals and mechanically stabilizes the insulating glazing unit 1. The sealing element 6 is, for example, formed from an organic polysulfide.

[0100] An insulation film (not shown here), which reduces the heat transfer through the polymeric spacer 5 into the inner region 12, is applied, for example, on the outer surface 5.3 of the spacer 5, i.e., on the side of the spacer 5 facing the outer region 13. The insulation film can, for example, be attached to the polymeric spacer 5 with a polyurethane hot-melt adhesive. The insulation film includes, for example, three polymeric layers of polyethylene terephthalate with a thickness of 12 μm and three metal layers made of aluminum with a thickness of 50 nm. The metal layers and the polymeric layers are attached alternatingly in each case, with the two outer plies formed by polymeric layers. In other words, the layer sequence consists of a polymeric layer, followed by a metal layer, followed by an adhesive layer, followed by a polymeric layer, followed by a metal layer, followed by an adhesive layer, followed by a metal layer, followed by a polymeric layer.

[0101] As already mentioned, the main body of the spacer 5 is made, for example, of glass-fiber-reinforced styrene acrylonitrile (SAN). By means of the selection of the glass fiber content in the spacer main body, its coefficient of thermal expansion can be varied and adjusted. By adjusting the coefficient of thermal expansion of the spacer main body and of the insulation film, temperature-induced stresses between the different materials and flaking of the insulation film can be avoided. The spacer main body has, for example, a glass fiber content of 35%. The glass fiber content in the spacer main body simultaneously improves strength and stability.

[0102] The first glass pane 4a and the second glass pane 4b are made, for example, of soda lime glass with a thickness of 3 mm and have, for example, dimensions of 1000 mm×1200 mm. It goes without saying that each insulating glazing unit 1 depicted in this and the following exemplary embodiments can also have three or more glass panes.

[0103] The insulating glazing unit 1 of FIGS. 1A and 1B is provided, by way of example, with an RFID transponder 9, which is arranged within the seal 6 and, here, for example, directly on the outer surface 5.4 of the spacer 5. It goes without saying that the RFID transponder 9 can also be arranged on the glass panes 4a or 4b within the outer region 13. The RFID transponder 9 is, for example, glued on the spacer 5 or fixed by the seal 6.

[0104] The operating frequency of the RFID transponder is in the UHF range and, for example, 866.6 MHz.

[0105] In the example shown, this is an RFID transponder 9, in which the dipole antenna 9.1 is arranged on a dielectric carrier body 9.2. This is necessary, since the spacer 5 has, as mentioned above, a metallized and, thus, electrically conductive (thermal) insulation film. Without the dielectric carrier body 9.2, the dipole antenna 9.1 would be arranged directly on the electrically conductive insulation film and thus “short-circuited”. Through the use of an RFID transponder 9 with a dielectric carrier body 9.2 (a so-called “on-metal” RFID transponder), the short-circuit can be avoided.

[0106] It goes without saying that in the case of spacers 5 made of a dielectric without insulation film or with purely dielectric insulation films (e.g., without metallization), the dipole antenna 9.1 of the RFID transponder 9 need not have a dielectric carrier body 9.2.

[0107] Furthermore, arranged on the end face 14 of the insulating glazing unit 1 is a coupling element 10, consisting, for example, of a 0.1-mm-thick copper foil. Here, the coupling element 10 extends, for example, from the end face 14 of the first glass pane 4a over the sealing element 6 and over the end face of the second glass pane 4b and has, on one side, an overhang 10.1 beyond the second glass pane 4b. The overhang U is, for example, 9 mm.

[0108] One edge of the coupling element 10 is arranged roughly congruently over one of the two antenna poles of the dipole antenna 9.1. In other words, the edge of the coupling element 10 is arranged essentially in the center of the dipole antenna 9.1.

[0109] Here, “congruently arranged” means that the coupling element 10 is arranged within the orthogonal projection of the antenna pole of the dipole antenna 9.1 with respect to the end face 14 of the insulating glazing unit 1, in the outer region 13 of which the RFID transponder 9 is arranged and at least completely covers it. In other words, the coupling element 10 is arranged, with respect to a plan view of the end face 14 of the insulating glazing unit 1, in front of the RFID transponder 9 and completely covers one antenna pole of the dipole antenna 9.1.

[0110] The length L of the coupling element 10 in its direction of extension parallel to the direction of extension of the dipole antenna 9.1 and thus parallel to the direction of extension of the long side of the glass panes 4a, 4b, is, for example, 15 cm. Thus, the coupling element 10 is roughly as long as the dipole antenna 9.1 and thus projects on one side beyond its end by approx. 50%.

[0111] Due to the small distance distance A of, for example, 2 mm between the dipole antenna 9.1 of the RFID transponder 9 and the coupling element 10 and the electrical insulation positioned therebetween by the sealing element 6, an electromagnetic coupling according to the invention takes place between the dipole antenna 9.1 and the coupling element 10.

[0112] FIG. 10 depicts a detailed view (cross-sectional representation) of an edge region of an insulating glazing unit 1 in accordance with another embodiment of the invention. The insulating glazing unit 1 of FIG. 10 differs from the insulating glazing unit 1 of FIG. 1A only in that the coupling element 10 is arranged in sections within the outer region 13 and within the sealing compound 6.

[0113] FIG. 1D depicts a detailed view (cross-sectional representation) of an edge region of an insulating glazing unit 1 in accordance with another embodiment of the invention. The insulating glazing unit 1 of FIG. 1D differs from the insulating glazing unit 1 of FIG. 1A only in the position of the RFID transponder 9, which, here, is arranged on an inner surface 19 of the first glass pane 4a lying in the outer region 13. Since, here, the RFID transponder 9 is arranged on a glass pane, i.e., an electrically insulating substrate, it does not necessarily have to have a dielectric carrier element 9.2. The RFID transponder 9 can be arranged on the glass pane 4a directly or only separated by a thin carrier film and/or an adhesive film. It goes without saying that the RFID transponder 9 can also have a dielectric carrier element 9.2 in this exemplary embodiment, without affecting the mode of operation.

[0114] FIG. 1E depicts a detailed view (cross-sectional representation) of an edge region of an insulating glazing unit 1 in accordance with another embodiment of the invention. The insulating glazing unit 1 of FIG. 1E differs from the insulating glazing unit 1 of FIG. 1A only in the position of the RFID transponder 9, which, here, is arranged on the outer surface 18 of the second glass pane 4b. Since, here, the RFID transponder 9 is arranged on a glass pane, i.e., an electrically insulating substrate, it does not necessarily have to have a dielectric carrier element 9.2. The RFID transponder 9 can be arranged on the glass pane 4b directly or only separated by a thin carrier film and/or an adhesive film. It goes without saying that the RFID transponder 9 can also have a dielectric carrier element 9.2 in this exemplary embodiment, without affecting the mode of operation.

[0115] The dipole antenna 9.1 of the RFID transponder 9 is arranged in this example according to the invention with respect to the coupling element 10 and is thus electromagnetically coupled in its overhang region 10.1 with the coupling element 10. It goes without saying that in this exemplary embodiment, the coupling element 10 does not have to extend over the full end face 14 of the insulating glazing unit 1. It is sufficient, for example, for it to extend over the end face 14 of the second glass pane 4b and to be secured thereon. It further goes without saying that the coupling element 10 can also extend over the full end face 14 of the insulating glazing unit 1 and can extend beyond with a further overhang 10.1′ (analogous to FIG. 3A below).

[0116] The distance of the dipole antenna 9.1 of the RFID transponder 9 from the lower edge of the second glass pane 4b, i.e., to the edge where the end face 14 and the outer surface 18 of the second glass pane 4b adjoin, is, for example, 3 mm.

[0117] FIG. 1F depicts a detailed view (cross-sectional representation) of an edge region of an insulating glazing unit 1 in accordance with another embodiment of the invention. The insulating glazing unit 1 of FIG. 1F differs from the insulating glazing unit 1 of FIG. 1E only in the position of the RFID transponder 9, which, here, is arranged on the outer surface 18 of the first glass pane 4a. Furthermore, the coupling element 10 projects in a region 10′ on the side of the insulating glazing unit 1 facing away from the overhang 10.1 and thus beyond the end face 14 of the first glass pane 4a, in order to couple there to the dipole antenna 9.1 of the RFID transponder.

[0118] FIG. 1G depicts a detailed view (cross-sectional representation) of an edge region of an insulating glazing unit 1 in accordance with another embodiment of the invention. The insulating glazing unit 1 of FIG. 1A [sic: FIG. 1G] differs from the insulating glazing unit 1 of FIG. 1A only in the position of the RFID transponder 9, which, here, is arranged on the end face 14 of the first glass pane 4a. Since, here, the RFID transponder 9 is arranged on a glass pane, i.e., an electrically insulating substrate, it does not necessarily have to have a dielectric carrier element 9.2. The RFID transponder 9 can be arranged on the glass pane 4a directly or only separated by a thin carrier film and/or an adhesive film.

[0119] For galvanic isolation, a thin plastic film is arranged between dipole antenna 9.1 and coupling element 10, for example. It goes without saying that the galvanic isolation also [sic] by multiple plastic films that are arranged on the dipole antenna 9.1 and/or the coupling element 10 and are, for example, fixedly connected thereto.

[0120] FIG. 2A depicts a detailed view (cross-sectional representation) of an edge region of a glazing 2 with an insulating glazing unit 1 in accordance with FIGS. 1A and 1B.

[0121] FIG. 2B depicts a detailed view (plan view) of a detail of the glazing 2 with an insulating glazing unit 1 of FIG. 2A with a viewing direction in accordance with arrow A of FIG. 2A.

[0122] FIG. 2C depicts a detailed view (cross-sectional representation) of the glazing 2 in a section plane parallel to the end face 14 of the insulating glazing unit 1 of FIG. 2A with a viewing direction along the arrow B of FIG. 2A.

[0123] FIG. 2A-C depict detailed views of the insulating glazing unit 1 of FIGS. 1A and 1B as they can, for example, be arranged within a glazing 2. For details concerning the insulating glazing unit 1, reference is therefore made to the description of FIGS. 1A and 1B. It goes without saying that the insulating glazing units 1 of FIG. 10 or 1D or other exemplary embodiments according to the invention can also be arranged in the glazing 2.

[0124] Furthermore, a, for example, U-shaped frame 3 surrounds the edges of the insulating glazing unit 1 together with the RFID transponder 9 and the coupling element 10. In this example, the frame 3 comprises a first metal frame element 3.1 that is connected to a second metal frame element 3.2 via a polymeric and electrically insulating third frame element 3.3. In this example, the first and second frame elements 3.1, 3.2 are L-shaped. The frame 3, in the shape of a U, thus engages around the end face 14 of the insulating glazing unit 1. The sections of the first and second frame elements running parallel to the large surfaces of the glass panes 4a, 4b are implemented such that they completely cover at least the outer region 13 with the sealing element 6 and the spacerframe 5′ in the through-vision direction (arrow A) through the insulating glazing unit 1.

[0125] The insulating glazing unit 1 is arranged on supports (not shown here), in particular on plastic supports or support elements electrically insulated by plastics. Furthermore, arranged in each case between the metal frame elements 3.1, 3.2 and the glass panes 4a, 4b is an elastomer profile 7 such that the insulating glazing unit 1 is firmly held within the frame 3. The elastomer profile 7 has, for example, a thickness of 6.5 mm and fixes the distance between the respective frame elements 3.1, 3.2 and the glass panes 4a, 4b.

[0126] As shown in FIG. 2C, the dipole antenna 9.1 consists of a first antenna pole 9.1.1 and a second antenna pole 9.1.2, both of which are connected to electronics in the center of the RFID transponder 9. The coupling element 10 is arranged such that it completely covers the first antenna pole 9.1.1 and projects beyond the first antenna pole 9.1.1 on the side facing away from the second antenna pole 9.1.2. A capacitive coupling occurs as a result of this covering and the small distance between the first antenna pole 9.1.1 and the coupling element 10.

[0127] As shown in detail in FIGS. 2A and 2C, the coupling element 10 is coupled to the metal second frame 3.2 in a coupling region 15. For this purpose, the copper foil of the coupling element 10 rests, for example, over its entire length, against the second frame element 3.2 and and is galvanically connected thereto. It goes without saying that a capacitive coupling is also sufficient for coupling high-frequency signals in the operating range of the RFID transponder 9.

[0128] As investigations by the inventors surprisingly revealed, by coupling the coupling element 10 to the frame 3 of the glazing 2, the signal of the dipole antenna 9.1 of the RFID transponder 9 can be conducted to the outside; and, conversely, a signal can be supplied to the RFID transponder 9 from the outside. Surprisingly, the range of the RFID signal is significantly increased compared to glazings 2 with insulating glazing units 1 without coupling element 10.

[0129] Thus, with an RFID readout device, it was possible to read out signals at a distance of up to 2.5 m and to send signals to the RFID transponder 9—in particular on the side of the insulating glazing unit 1 on which the second, coupled, metal frame element 3.2 is arranged.

[0130] FIG. 3A depicts a detailed view (cross-sectional representation) of an edge region of a glazing 2 with an insulating glazing unit 1 in accordance with another embodiment of the invention,

[0131] FIG. 3B depicts a detailed view (cross-sectional representation) of the glazing in a section plane parallel to the end face 14 of the insulating glazing unit of FIG. 3A in the viewing direction of the arrow B of FIG. 3A.

[0132] FIGS. 3A and 3B depict a modified design that has largely the elements and the structure of the glazing 2 with an insulating glazing unit 1 of FIG. 2A-C. To that extent, the same reference numbers are used as there and the structure is not described again here.

[0133] The insulating glazing unit 1 of FIGS. 3A and 3B differs from FIGS. 2A and 2C in the design of the coupling element 10, which has here, on both sides, an overhang 10.1, 10.1′ beyond the second glass pane 4b and the first glass pane 4a. This yields two coupling regions 15, 15′, in which the coupling element 10 couples to the first and second frame elements 3.1, 3.2. Overall, this leads to a symmetrization of the above-described properties for improving readout ranges of the RFID signal such that equal signal strengths can be achieved on both sides of the insulating glazing unit 1.

[0134] Table 1 shows measurement results on a glazing 2 according to the invention with an insulating glazing unit 1 in accordance with FIGS. 3A and 3B and an insulating glazing unit 1 according to the invention in accordance with FIGS. 1A and 1B compared to a comparative example. The Comparative Example is a glazing unit not according to the invention having an insulating glazing unit with an RFID transponder 9 in accordance with FIG. 2A-C, but without a coupling element 10 according to the invention.

TABLE-US-00001 TABLE 1 Typical maximum reading range with RFID handheld reader Comparative Example (glazing 0.3 m-0.5 m with RFID transponder without coupling element) Glazing with an insulating glazing 1.5 m-2 m.sup.  unit of FIGS. 3A and 3B Insulating glazing unit of FIGS. 1A .sup. 2 m-2.5 m and 1B (without frame)

[0135] For the comparative measurements, the RFID transponder 9 was read out with a handheld RFID reader and the reader was arranged at increasing distance from the RFID transponder 9. The distance was measured with a laser rangefinder. The maximum reading range was independent of the side on which measurements were made relative to the insulating glazing.

[0136] In the Comparative Example of an RFID transponder 9, which was arranged in a glazing in the outer region 13 of a prior art insulating glazing unit (without a coupling element), a maximum reading range of 0.5 m resulted. The range of 0.3 m to 0.5 m reported in Table 1 was obtained from different angles at which the reader was held relative to the insulating glazing unit. Such a short range is insufficient for practical use, since in the case of an unknown position of the RFID transponder in the glazing, the entire frame must be searched.

[0137] In contrast, in the case of an insulating glazing unit 1 according to the invention with a coupling element 10 that is arranged in the frame 3 of a glazing 2 according to the invention, there were surprisingly ranges of up to 2 m. This is completely sufficient for practical use and corresponds to roughly half the distance values that an RFID transponder 9 has according to specification. For a freestanding insulating glazing unit 1 per FIGS. 1A and 1B (i.e., without the shielding frame 3 of a glazing), there was a maximum reading range of approx. 4 m.

[0138] FIG. 4 depicts a detailed view (cross-sectional representation) of a glazing 2 in a section plane parallel to the end face 14 of an insulating glazing unit 1 in accordance with another embodiment of the invention.

[0139] Here, one edge 16 of the coupling element 10 is not arranged centrally relative to the dipole antenna 9.1 (center of the dipole 17), but is shifted by an offset V of roughly 10 mm. The coupling element 10 thus also covers part of the second antenna pole 9.1.2. Nevertheless, good RFID signals were measured here. Overall, up to an offset V of 20% of the half wavelength lambda/2 of the operating frequency of the RFID transponder 9, good and practically utilizable signals or sufficiently large maximum reading ranges can be obtained. It is irrelevant whether the offset V is in the direction of the first antenna pole 9.1.1 or in the direction of the second antenna pole 9.1.2. Investigations by the inventors revealed that such an arrangement also positively affects the reception/transmission characteristics and increases the achievable readout distance of the RFID transponder 9.

[0140] The implementation of the invention is not restricted to the above-described examples and highlighted aspects of the embodiments, but is also possible in a large number of modifications that are evident to the person skilled in the art from the dependent claims.

LIST OF REFERENCE CHARACTERS

[0141] 1 insulating glazing unit [0142] 2 glazing [0143] 3 frame [0144] 3.1,3.2 metal, first or second frame element [0145] 3.3 polymeric, third frame element [0146] 4a, 4b glass panes [0147] 5 spacer [0148] 5′ spacer frame [0149] 5.1,5.2 pane contact surface [0150] 5.3 outer surface of the spacer 5 [0151] 5.4 inner surface of the spacer 5 [0152] 6 sealing element [0153] 7 elastomer profile [0154] 9 RFID transponder [0155] 9.1 dipole antenna [0156] 9.1.1, 9.1.2 first or second antenna pole [0157] 9.2 dielectric carrier element [0158] 10 coupling element [0159] 10′ region of the coupling element 10 [0160] 10.1, 10.1′ overhang [0161] 12 inner region [0162] 13 outer region [0163] 13.1 outer side of the outer region 13 [0164] 14 end face of the insulating glazing unit 1 or of the glass panes 4a, 4b [0165] 15 coupling region [0166] 16 edge of the coupling element 10 [0167] 17 center of the dipole antenna 9.1 [0168] 18 outer surface of the glass pane 4a or 4b [0169] 19 inner surface of the glass pane 4a or 4b [0170] Arrow A plan view direction or through-vision direction [0171] Arrow B plan view direction [0172] A distance [0173] L length [0174] Lambda wavelength [0175] U overhang [0176] V offset