On-glass short-circuit monopole antenna design
By creating a separation gap between the window glass surface and the metal frame and using a conductive adhesive layer to electrically connect the grounding wire, the problem of the antenna being obstructed by the defroster wire on the rear window of the vehicle was solved, achieving effective antenna placement and size reduction.
Patent Information
- Application Number
- CN202411001863.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-05-28
- Filing Date
- 2024-07-25
- Publication Date
- 2025-11-28
AI Technical Summary
In the prior art, the placement of the antenna on the rear window of the vehicle is obstructed by the defroster wire, making it difficult to effectively arrange and operate in areas not used by the defroster wire.
An antenna is installed on the glass surface of the car window and electrically connected to the metal frame through a separation gap. A conductive adhesive layer is used to fix the grounding wire to the metal frame, avoiding crossing with the defroster wire, thus achieving an effective antenna arrangement.
By electrically connecting the antenna to the metal frame through the separation gap on the glass surface, the antenna placement problem is solved, interference with the defroster wires is avoided, and the size and area of the antenna are reduced.
Smart Images
Figure CN121035587A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to antennas for use in vehicles, and in particular to antenna assemblies that can be implemented in vehicle windows that include defroster wires. BACKGROUND
[0002] Vehicles include antennas for communication of various signals, such as radio signals, satellite signals, etc. As antenna size decreases, options for antenna placement increase. However, placement of antennas on a rear window of a vehicle is hindered by the presence of a defroster wire, which occupies a large portion of the rear window. Accordingly, it is desirable to provide an antenna assembly that can be arranged to fit in and operate within the remaining area of the rear window that is not used by the defroster wire. SUMMARY
[0003] In one example embodiment, an antenna assembly for a vehicle window is disclosed. The antenna assembly includes an antenna, a feed line, and a ground line. The antenna has a first end and a second end opposite the first end. The antenna is disposed on a glass surface of the window with the first end intersecting a horizontal cover line of a metal frame of the window tangentially. The feed line is connected to the first end of the antenna at the horizontal cover line to connect the antenna to a communication device. The ground line electrically couples the second end of the antenna to the metal frame.
[0004] In addition to one or more features described herein, the metal frame is on top of a portion of the glass surface and separated from the glass surface by a separation gap, and the ground line is in the separation gap, and a layer of conductive adhesive in the separation gap electrically couples the ground line to the metal frame.
[0005] In addition to one or more features described herein, the layer of conductive adhesive includes a urethane adhesive.
[0006] In addition to one or more features described herein, the ground line extends horizontally from the second end of the antenna to a vertical edge of the metal frame.
[0007] In addition to one or more features described herein, the ground line includes a first portion extending horizontally from the second end of the antenna and a second portion electrically coupling the first portion to a top edge of the metal frame.
[0008] In addition to one or more features described herein, the ground line includes a third portion extending horizontally from the second end of the antenna on an opposite side of the first portion and a fourth portion electrically coupling the third portion to a top edge of the metal frame.
[0009] In addition to one or more of the features described herein, the window is a rear window including a set of defroster wires, and the antenna is disposed in an antenna region between the set of defroster wires and a top edge of the metal frame.
[0010] In another example embodiment, a vehicle window is disclosed. The window includes a glass surface, a metal frame surrounding the glass surface, a set of defroster wires in the glass surface, wherein a top wire of the set of defroster wires is separated from a top edge of the metal frame by an antenna region in which an antenna is disposed, the antenna having a first end and a second end opposite the first end, wherein the first end intersects a horizontal footprint line of the metal frame tangentially, a feed line is connected to the first end at the horizontal footprint line, and a ground line electrically couples the second end of the antenna to the metal frame.
[0011] In addition to one or more of the features described herein, the metal frame is on top of a portion of the glass surface and separated from the glass surface by a separation gap, and the ground line is in the separation gap, and a conductive adhesive layer in the separation gap electrically couples the ground line to the metal frame.
[0012] In addition to one or more of the features described herein, the conductive adhesive layer includes a urethane adhesive.
[0013] In addition to one or more of the features described herein, the ground line extends horizontally from the second end of the antenna to a vertical edge of the metal frame.
[0014] In addition to one or more of the features described herein, the ground line includes a first portion extending horizontally from the second end of the antenna and a second portion electrically coupling the first portion to the top edge of the metal frame.
[0015] In addition to one or more of the features described herein, the ground line includes a third portion extending horizontally from the second end of the antenna on an opposite side of the first portion and a fourth portion electrically coupling the third portion to the top edge of the metal frame.
[0016] In addition to one or more of the features described herein, the vehicle window is a rear window of a vehicle.
[0017] In yet another example embodiment, a vehicle is disclosed. The vehicle includes a window having a glass surface, a metal frame surrounding a perimeter of the window, the metal frame defining at least a horizontal cover line and a vertical cover line, wherein the metal frame is separated from the glass surface by a separation gap, a set of defroster wires in the glass surface, wherein a top wire of the set of defroster wires is separated from a top edge of the metal frame by an antenna area, an antenna disposed on the glass surface in the antenna area, the antenna having a first end and a second end opposite the first end, wherein the first end tangentially intersects the horizontal cover line of the metal frame, a feed line connected to the first end of the antenna at the horizontal cover line, and a ground line electrically coupled the second end of the antenna to the metal frame.
[0018] In addition to one or more features described herein, the metal frame is on top of a portion of the glass surface and separated from the glass surface by a separation gap, and the ground line is in the separation gap, and a conductive adhesive layer in the separation gap electrically couples the ground line to the metal frame.
[0019] In addition to one or more features described herein, the conductive adhesive layer includes a urethane adhesive.
[0020] In addition to one or more features described herein, the ground line extends horizontally from the second end of the antenna to a vertical edge of the metal frame.
[0021] In addition to one or more features described herein, the ground line includes a first portion extending horizontally from the second end of the antenna and a second portion electrically coupling the first portion to the top edge of the metal frame.
[0022] In addition to one or more features described herein, the ground line includes a third portion extending horizontally from the second end of the antenna on an opposite side of the first portion and a fourth portion electrically coupling the third portion to the top edge of the metal frame.
[0023] The foregoing features and advantages of the present disclosure, as well as other features and advantages, are readily apparent from the following detailed description, when taken in connection with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0024] Other features, aspects, and details are described below with reference to the drawings. The foregoing aspects and features are merely examples of the present disclosure and are understood not to narrow the scope of the disclosure, which is set forth in the claims.
[0025] Figure 1 A vehicle according to an example embodiment is shown;
[0026] Figure 2 A view of a window of the vehicle along the y-axis is shown in an embodiment;
[0027] Figure 3A A close-up view of the upper left corner of a vehicle window in an illustrative embodiment is shown;
[0028] Figure 3B A close-up view of the upper left corner of a vehicle window in an alternative embodiment is shown;
[0029] Figure 4 A side view of a window and antenna assembly in an illustrative embodiment is shown;
[0030] Figure 5A A top view of the upper left corner of a vehicle window in an alternative embodiment is shown;
[0031] Figure 5B A top view of the upper left corner of a vehicle window in an alternative embodiment is shown;
[0032] Figure 6A A top view of the upper left corner of a vehicle window in another alternative embodiment is shown;
[0033] Figure 6B A top view of the upper left corner of a vehicle window in another alternative embodiment is shown;
[0034] Figure 7 A close-up view of a monopole antenna in an illustrative embodiment is shown; Figure 3A and Figure 3B A close-up view of a monopole antenna in an illustrative embodiment is shown. DETAILED DESCRIPTION
[0035] The following description is merely exemplary in nature and is not intended to limit the present disclosure, its application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
[0036] According to an exemplary embodiment, Figure 1 A vehicle 100 is shown. The vehicle 100 includes a vehicle window 102 having an antenna assembly 104 embedded therein for communication purposes. The vehicle window 102 is shown as a rear window of the vehicle 100, but in various embodiments can be any window of the vehicle. The vehicle window 102 divides the space around the vehicle 100 into an exterior region 106 outside the vehicle (i.e., behind the vehicle window 102) and an interior region 108 inside the vehicle (i.e., in front of the vehicle window). A coordinate system 112 of the antenna assembly 104 is shown. The x-axis and z-axis define the plane of the vehicle window 102 and the plane of the antenna assembly 104. The terms “left” and “right” are used to indicate movement or placement of an object along the x-axis, while the terms “top” and “bottom” are used to indicate movement or placement of an object along the z-axis. The y-axis is directed out of the plane of the vehicle window 102 and into the exterior region 106. Placement of a first object “on top of” a second object is indicated by the first object being in a more positive location along the y-axis than the second object.
[0037] Antenna assembly 104 is coupled to communication device 110, such as a Global Positioning Satellite (GPS) or Global Navigation Satellite System (GNSS) receiver. In various embodiments, antenna assembly 104 is capable of communication in the range between 600 MHz and 6 GHz.
[0038] Figure 2 Figure 200 shows a vehicle window 102 viewed along the y-axis in an embodiment. The window 102 includes a glass surface 202 and a metal frame 204 that secures the glass surface 202 to the vehicle. The metal frame 204 is located around the periphery of the glass surface 202 and includes a top edge 206, a bottom edge 208, a left edge 210, and a right edge 212. Each of the top edge 206 and the bottom edge 208 forms a horizontal edge of the window 102, while each of the left edge 210 and the right edge 212 forms a vertical edge of the window. Although not shown, the edges of the glass surface 202 may extend below the corresponding edges of the metal frame 204. A defroster wire assembly 214 fills the area of the window 102. The top wire 216 of the defroster wire assembly 214 is separated from the top edge 206 of the metal frame 204 via an antenna region 218. Antenna assembly 104 is disposed in antenna region 218 in the upper left corner of window 102 (i.e., the angle defined by the intersection of top edge 206 and left edge 210). Glass surface 202, antenna assembly 104 and metal frame 204 are located in different layers along the y-axis, as discussed herein with respect to FIG5.
[0039] Figure 3A A close-up view 300 of the upper left corner of the window 102 in the illustrative embodiment is shown. Close-up view 300 shows the top edge 206 and left edge 210 of the metal frame 204. A horizontal gaiter 302 defines the interval between portions of the window that are visible from the portion of the window hidden below the top edge 206. A vertical gaiter 304 defines the interval between the visible portion of the window and the portion of the window hidden below the left edge 210.
[0040] Antenna assembly 104 includes a monopole antenna 306 disposed in the upper left corner of the outer surface of window 102 and within antenna region 218. Monopole antenna 306 includes a first end 308 and a second end 310 opposite to the first end. The first end 308 is disposed near the top edge 206, and the second end 310 is disposed far from the top edge. The first end 308 may include a circular or curved profile tangentially intersecting a horizontal coverage line 302. A feed line 312 connects to the first end of monopole antenna 306 at the horizontal coverage line 302. The feed line 312 connects monopole antenna 306 to communication device 110. Figure 1This allows for the transmission and / or reception of RF signals.
[0041] The second end 310 of the monopole antenna 306 is located near the top conductor 216 of the defroster conductor assembly 214. A grounding wire 314 extends from the second end 310 along a horizontal line toward the left edge 210 of the metal frame 204 (i.e., parallel to the top conductor 216). The grounding wire 314 passes through the vertical cover line 304, such that the grounding section 316 of the grounding wire is located between the metal frame 204 and the glass surface 202, as shown... Figure 4 As shown.
[0042] Figure 3B A close-up view 320 of the upper left corner of the window 102 in an alternative embodiment is shown. A grounding wire 314 extends from the second end 310 along a horizontal line toward the left edge 210 of the metal frame 204. The grounding wire 314 passes through the vertical overlay line 304 to form a grounding layer 322. The outline shape of the grounding layer 322 conforms to the shape of the upper left corner of the metal frame 204, including a portion of the top edge 206 and a portion of the left edge 210. The grounding layer 322 is located between the metal frame 204 and the glass surface 202, as shown... Figure 4 As shown.
[0043] Figure 4 A side view 400 of a window 102 and antenna assembly 104 in an illustrative embodiment is shown. The y-axis is shown relative to the window 102. Side view 400 shows a glass layer 402 including a glass surface 202, an antenna layer 404 including the antenna assembly 104, a conductive adhesive layer 406, and a metal frame 204. The metal frame 204 is on top of the glass surface 202 and separated from the glass surface by a separation gap h. In various embodiments, the separation gap h is approximately 6 mm. A grounding segment 316 of the antenna assembly 104 is disposed on the glass surface 202 and located within the separation gap h. The conductive adhesive layer 406 is disposed in the separation gap h to secure the grounding segment 316 to the metal frame 204. The conductive adhesive layer 406 electrically connects the grounding segment 316 to the metal frame 204, thereby grounding the monopole antenna 306. In various embodiments, the conductive adhesive layer 406 comprises a polyurethane adhesive. Although for... Figure 3A The grounding section 316 was discussed Figure 4 However, in an alternative embodiment, the grounding layer 322 may be disposed in the separation gap h and adhered to the metal frame 204 via the conductive adhesive layer 406.
[0044] Figure 5AA top view 500 of the upper left corner of the window 102 in an alternative embodiment is shown. A monopole antenna 306 is disposed on the outer surface of the glass surface 202 within the antenna region 218, wherein the circular outline of the first end 308 intersects tangentially with the horizontal coverage line 302. A feed line 312 is connected to the first end 308 at the horizontal coverage line 302.
[0045] At the second end 310 of the monopole antenna 306, a first portion 502 of the grounding wire 314 extends along a horizontal line toward the left edge 210 of the metal frame 204. A second portion 504 connects the first portion 502 to the metal frame 204 at its top edge 206. A grounding segment 506 of the second portion 504 crosses the horizontal overlay line 302 to lie between the metal frame 204 and the glass surface 202. Figure 4 As shown, the grounding section 506 is electrically connected to the metal frame 204 via the conductive adhesive layer 406.
[0046] Figure 5B A top view 510 of the upper left corner of the window 102 in an alternative embodiment is shown. A second portion 504 extends through the horizontal cover line 302 and forms a grounding layer 522 located between the top edge 206 of the metal frame 204 and the glass surface 202. The grounding layer 522 is electrically connected to the metal frame 204 via a conductive adhesive layer 406.
[0047] Figure 6A A top view 600 of the upper left corner of the window 102 in another alternative embodiment is shown. A monopole antenna 306 is disposed on the outer surface of the glass surface 202 within the antenna region 218, wherein the circular outline of the first end 308 intersects tangentially with the horizontal coverage line 302. A feed line 312 is connected to the first end 308 at the horizontal coverage line 302.
[0048] A first ground wire 602 extends from the second end 310 of the monopole antenna 306. The first ground wire 602 includes a first portion 604 and a second portion 606. The first portion 604 extends horizontally from the second end 310 toward the left edge 210 of the metal frame 204. The second portion 606 is a vertical portion connecting the first portion 604 to the top edge 206 of the metal frame 204. The second portion 606 includes a ground segment 608 that passes through the horizontal cover wire 302 and is located between the top edge 206 and the glass surface 202. The ground segment 608 is electrically connected to the metal frame 204, as shown below. Figure 4 As shown.
[0049] A second grounding wire 612 extends from the second end 310 of the monopole antenna 306. The second grounding wire 612 includes a third portion 614 and a fourth portion 616. The third portion 614 extends horizontally from the second end 310 in a direction away from the left edge 210. The fourth portion 616 is a vertical portion connecting the third portion 614 to the top edge 206. The fourth portion 616 includes a grounding segment 618 extending through the metal frame 204 to be located between the top edge 206 and the glass surface 202. The grounding segment 618 is electrically connected to the metal frame, as shown below. Figure 4 As shown.
[0050] Figure 6B A top view 620 of the upper left corner of the window 102 in another alternative embodiment is shown. A second portion 606 of the first grounding wire 602 passes through the horizontal cover line 302 of the top edge 206 to form a grounding layer 622 located between the top edge 206 and the glass surface 202. Similarly, a fourth portion 616 of the second grounding wire 612 passes through the horizontal cover line 302 of the top edge 206 and enters the grounding layer 622. The grounding layer 622 is electrically connected to the metal frame 204 via a conductive adhesive layer 406.
[0051] The grounding wire is arranged to avoid intersecting with any defrost wires, thereby avoiding or preventing any interference from the defrost wires. Furthermore, the presence of the grounding wire at the second end of the monopole antenna 306 allows for a reduction in the antenna's size and area. Although the antenna assembly is discussed as being located in the upper left corner of the window, it should be understood that the antenna assembly can be located in other suitable locations, such as, but not limited to, the upper right, lower left, and lower right corners.
[0052] Figure 7 An illustrative embodiment is shown. Figure 3A and Figure 3B A close-up view 700 of a monopole antenna 306. The monopole antenna 306 includes a grid of wires 702 surrounded by an edge 704. The edge 704 is made of wires thicker than the wires in the grid 702. The monopole antenna extends from a first end 308 to a second end 310. A feed wire 312 is shown at the first end 308, and a ground wire 314 is shown extending from the second end 310 along a horizontal line toward the left edge 210. Although the ground wire 314 is shown as a solid material, in various embodiments, the ground wire may include a mesh structure such as that shown in grid 702. Figure 5A , 5B The monopole antennas of the 6A and 6B can be manufactured with similar structures.
[0053] While the antenna assembly has been described herein as including a monopole antenna, it should be understood that the antenna assembly can include any type of antenna, such as a dipole antenna, a quadrupole antenna, etc. Various methods can be used to form the antenna assembly on the glass surface 202. In one method, the antenna is printed onto a transparent filament or decal, which has an adhesive on one side for attachment to the glass surface 202. In another embodiment, the antenna is printed on the glass itself.
[0054] The term “a” does not indicate a limitation of quantity, but rather that at least one of the referenced items is present. Unless the context clearly indicates otherwise, the term “or” means “and / or”. Throughout the specification, reference to “aspect” means that a particular element described in connection with that aspect (e.g., a feature, structure, step, or characteristic) is included in at least one aspect described herein and may or may not be present in other aspects. Furthermore, it should be understood that the described elements may be combined in any suitable manner in the aspects.
[0055] When an element, such as a layer, film, region, or substrate, is referred to as being “on” another element, it can be directly on the other element, or there may be intermediate elements present. Conversely, when an element is referred to as being “directly” on another element, there are no intermediate elements present.
[0056] Unless otherwise stated herein, all test standards are the most recent standards in effect as of the date of filing of this application, or, if priority is claimed, the date of filing of the earliest priority application in which a test standard appears.
[0057] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains.
[0058] While the foregoing disclosure has been described with reference to exemplary embodiments, those skilled in the art will understand that various changes can be made and elements can be substituted with equivalents without departing from its scope. Furthermore, many modifications can be made to adapt particular situations or materials to the teachings of this disclosure without departing from the basic scope of this disclosure. Therefore, it is intended that this disclosure be limited to the specific embodiments disclosed, but will include all embodiments falling within its scope.
Claims
1. An antenna assembly suitable for vehicle windows, comprising: An antenna having a first end and a second end opposite to the first end, the antenna being disposed on the glass surface of the vehicle window, wherein the first end intersects tangentially with the horizontal coverage line of the metal frame of the window; A feed line that connects to the first end of the antenna at the horizontal coverage line, wherein the feed line connects the antenna to the communication device; as well as A grounding wire electrically connects the second end of the antenna to the metal frame.
2. The antenna assembly of claim 1, wherein the metal frame is on top of a portion of the glass surface and separated from the glass surface by a separation gap, and the ground wire is in the separation gap, the antenna assembly further comprising a conductive adhesive layer in the separation gap, the conductive adhesive layer electrically connecting the ground wire to the metal frame.
3. The antenna assembly of claim 1, wherein the grounding wire extends horizontally from the second end of the antenna to the vertical edge of the metal frame.
4. The antenna assembly of claim 1, wherein the grounding wire comprises a first portion extending horizontally from the second end of the antenna and a second portion electrically connecting the first portion to the top edge of the metal frame.
5. The antenna assembly of claim 4, wherein the grounding wire comprises a third portion and a fourth portion, the third portion extending horizontally from the second end of the antenna on the opposite side of the first portion, and the fourth portion electrically connecting the third portion to the top edge of the metal frame.
6. A vehicle comprising: The vehicle's window, the window having a glass surface; A metal frame surrounding the periphery of the window, the metal frame defining at least a horizontal cover line and a vertical cover line, wherein the metal frame is separated from the glass surface by a separation gap; A set of defrost wires in the glass surface, wherein the top wire of the set of defrost wires is separated from the top edge of the metal frame through the antenna region; An antenna disposed on the glass surface in the antenna region, the antenna having a first end and a second end opposite to the first end, wherein the first end intersects tangentially with the horizontal coverage line of the metal frame; A feed line, the feed line being connected to the first end of the antenna at the horizontal coverage line; and A grounding wire electrically connects the second end of the antenna to the metal frame.
7. The vehicle of claim 6, wherein the metal frame is on top of a portion of the glass surface and separated from the glass surface by a separation gap, and the grounding wire is in the separation gap, the vehicle further comprising a conductive adhesive layer in the separation gap, the conductive adhesive layer electrically connecting the grounding wire to the metal frame.
8. The vehicle of claim 6, wherein the grounding wire extends horizontally from the second end of the antenna to the vertical edge of the metal frame.
9. The vehicle of claim 6, wherein the grounding wire comprises a first portion extending horizontally from the second end of the antenna and a second portion electrically connecting the first portion to the top edge of the metal frame.
10. The vehicle of claim 9, wherein the grounding wire comprises a third portion and a fourth portion, the third portion extending horizontally from the second end of the antenna on the opposite side of the first portion, and the fourth portion electrically connecting the third portion to the top edge of the metal frame.