CN211088492U

CN211088492U - Low-profile automobile glass antenna

Info

Publication number: CN211088492U
Application number: CN201922182125.1U
Authority: CN
Inventors: 张磊; 杨帆; 宁丹; 张志彬
Original assignee: Beijing Wanji Technology Co Ltd
Current assignee: Beijing Wanji Technology Co Ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-07-24
Anticipated expiration: 2029-12-06

Abstract

The utility model relates to an intelligent transportation technical field discloses a car glass antenna of low section. The antenna comprises automobile glass, a first metal patch, a vehicle-mounted electronic tag shell, a second metal patch, a dielectric substrate and a third metal patch, wherein the first metal patch, the vehicle-mounted electronic tag shell, the second metal patch, the dielectric substrate and the third metal patch are attached to an interlayer of the automobile glass. Wherein: the automobile glass is used as an attachment carrier of the first metal patch, the dielectric substrate is used as an attachment carrier of the second metal patch and the third metal patch, the first metal patch is used as a radiation patch of the antenna, the second metal patch is used as a metal floor and a coupling gap of the antenna, the third metal patch feeds the first metal patch through coupling, radiation and propagation of electromagnetic waves are achieved, and the vehicle-mounted electronic tag shell provides structural support for a feed structure of the whole antenna. Through above-mentioned structure, realized the integrated design of antenna with car glass, reduced the inside size area of OBU, realized the miniaturization of OBU equipment, low section and lightweight design.

Description

Low-profile automobile glass antenna

Technical Field

The utility model relates to an intelligent transportation technical field especially relates to a car antenna of low section.

Background

In recent years, with the rapid development of the intelligent transportation field, Electronic Toll Collection (ETC) is becoming widespread, gradually replacing manual toll Collection, and becoming the mainstream of high-speed toll Collection in the future.

On-Board Unit (OBU), which is an important component of the ETC charging system, is being developed toward miniaturization, weight reduction, low profile, and integration. At present, a 5.8GHz communication antenna adopted in an on-vehicle electronic tag is a circularly polarized microstrip antenna, and due to the consideration of cost factors, the adopted plate is usually an FR-4 plate with large loss, so that the gain of the on-vehicle electronic tag is low. In order to compensate for the loss of gain, it is often necessary to gain couple a cover layer above the on-board microstrip antenna, thereby forming an air-stacked circularly polarized microstrip antenna and increasing the antenna gain of the entire OBU system. Because a certain height needs to be ensured between the covering layer and the OBU substrate, and meanwhile, the covering layer also needs to keep a certain distance from the inner surface of the OBU shell, the two points limit the overall section height of the OBU, and are not beneficial to the low-section design of the OBU structure. Meanwhile, a 5.8GHz microstrip antenna is loaded on a PCB of the OBU, so that the large size area of the circuit board is occupied, and the miniaturization design of the OBU is not facilitated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a low section automobile glass antenna, include: automobile glass, first metal level, on-vehicle electronic tags casing, second metal level, first medium base plate and third metal level, wherein:

the automobile glass is of a sandwich structure, and the first metal layer is positioned in a sandwich layer of the automobile glass;

the second metal layer and the third metal layer are printed on the upper surface and the lower surface of the first dielectric substrate;

the first medium substrate is positioned inside the vehicle-mounted electronic tag shell.

Optionally, the automobile glass is of a plane or curved surface structure, and the first metal layer is attached to any interlayer of the automobile glass through a plurality of interlayers.

Optionally, the second metal layer is a metal patch with a slotted slot structure.

Optionally, the first dielectric substrate is located inside the vehicle-mounted electronic tag shell and is 0mm to 3mm away from the inner surface of the vehicle-mounted electronic tag shell.

The utility model has the advantages that: through moving the antenna from on-vehicle electronic tags to among the automotive glass intermediate layer, saved the inside antenna area occupied of OBU, be favorable to realizing OBU's miniaturized design, broken the restraint of antenna to the OBU internal height, can reduce the thickness of whole OBU structure by a wide margin to realize OBU's low profile design, simultaneously, be favorable to realizing the integrated design of glass structure function, be favorable to realizing the integrated design of on-vehicle OBU system.

Drawings

The features and advantages of the invention will be more clearly understood by reference to the accompanying drawings, which are schematic and are not to be understood as limiting the invention in any way, in which:

fig. 1 is a perspective view of a low profile automotive glass antenna according to an embodiment of the present invention;

fig. 2 is a top view of a first metal layer of a low profile automotive glass antenna according to an embodiment of the present invention;

fig. 3 is a top view of a first dielectric substrate of a low-profile automotive glass antenna according to an embodiment of the present invention;

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The embodiment of the utility model provides a low section's car glass antenna, as shown in fig. 1 ~ 3, include: automobile glass 101, first metal layer 102, on-vehicle electronic tags casing 104, first dielectric substrate 103, second metal layer 105, third metal layer 106, wherein:

a first metal layer 102 is located in the interlayer of the automotive glass 101 and serves as a radiation layer of the antenna;

the second metal layer 105 is positioned on the upper surface of the first dielectric substrate 103 and is used as an antenna metal ground layer;

the third metal layer 106 is located on the lower surface of the first dielectric substrate 103 and is used as a coupling feed layer of the antenna;

the first dielectric substrate 103 is located inside the vehicle-mounted electronic tag shell 104 and is 0 mm-3 mm away from the inner surface of the vehicle-mounted electronic tag shell 104.

Further, the first metal patch 102 is a square patch, and has two triangular cut corners along the diagonal direction;

furthermore, a rectangular metal groove 107 is formed on the surface of the second metal layer 105;

further, the third metal layer is a rectangular feeder structure and is located right below the second metal layer 105.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A low profile automotive glass antenna, comprising: automobile glass, first metal level, on-vehicle electronic tags casing, second metal level, first medium base plate and third metal level, wherein:

the automotive glass comprises a plurality of interlayers, and the first metal layer is located between any 2 of the interlayers;

the second metal layer is printed on the upper surface of the first dielectric substrate;

the third metal layer is printed on the lower surface of the first medium substrate;

2. The low profile automotive glass antenna of claim 1, wherein the automotive glass is planar or curved.

3. A low profile automotive glass antenna as claimed in claim 1, wherein said second metal layer is a metal patch.

4. The low-profile automotive glass antenna of claim 1, wherein the first dielectric substrate is located inside the vehicle-mounted electronic tag housing and is 0mm to 3mm away from the inner surface of the vehicle-mounted electronic tag housing.

5. A low profile automotive glass antenna as claimed in claim 3, wherein said metal patch is slotted at the axis.