CN219591649U

CN219591649U - Conformal antenna applied to automobile glass

Info

Publication number: CN219591649U
Application number: CN202320528774.6U
Authority: CN
Inventors: 林益富
Original assignee: Fujian Huichuang Xingao Electronic Science & Technology Co ltd
Current assignee: Fujian Huichuang Xingao Electronic Science & Technology Co ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-08-25
Anticipated expiration: 2033-03-17

Abstract

The utility model discloses a conformal antenna applied to automobile glass, which comprises a first base material, a second base material, a metal radiation patch layer, a third base material and a metal stratum which are sequentially arranged from bottom to top; the metal radiation patch layer comprises a plurality of metal units which are arranged in a matrix, wherein the metal units are mutually arranged at intervals to form a super-surface structure so as to converge radiation beams; the metal stratum is provided with a pi-shaped groove; the tail ends of the two bending arms at the bottom of the pi-shaped groove are in a gradual-change ladder-shaped structure, and the L-shaped grooves are symmetrically arranged on the opposite inner sides of the two bending arms of the pi-shaped groove; and respectively welding the coaxial line core and the shielding layer of the antenna at the middle position of the cross arm of the pi-shaped groove. The antenna has good performance, low profile, small size and attractive appearance, can be well conformal with glass, is not influenced by background environment, and can effectively provide wireless transmission performance of automobiles.

Description

Conformal antenna applied to automobile glass

Technical Field

The utility model relates to the technical field of wireless communication, in particular to a conformal antenna applied to automobile glass.

Background

With the popularization of automobiles and the deepening of the intelligent and networking degree of automobiles, novel wireless communication and sensor technology is rapidly developed in the automobile industry, and more wireless facilities are required on modern automobiles. Not only standard am-fm broadcast receiving systems but also television reception, keyless entry, remote control functions, satellite navigation, mobile phones, and future digital radios, etc. are required. The radio system antennas of these service facilities have thus been generated as front-end devices of radio systems playing an important role in wireless communication systems, which are important tools for transmitting and receiving signals, the performance of which directly affects the quality of the whole system and the efficiency of communication. The automobile antenna is small in size, good and stable in performance, attractive in appearance, easy to conform, low in section, small in size, attractive in appearance and the like, and is focused by people more and more, so that the automobile glass antenna becomes a research hotspot.

Disclosure of Invention

The utility model aims to provide a conformal antenna applied to automobile glass, which covers a frequency band of 5.71-5.92 GHz, and has the advantages of good performance, small size, novel appearance and perfect integration with the automobile glass.

The technical scheme adopted by the utility model is as follows:

a conformal antenna applied to automobile glass comprises a first base material, a second base material, a metal radiation patch layer, a third base material and a metal stratum which are sequentially arranged from bottom to top; the metal radiation patch layer comprises a plurality of metal units which are arranged in a matrix, wherein the metal units are mutually arranged at intervals to form a super-surface structure so as to converge radiation beams; the metal stratum is provided with a pi-shaped groove; the tail ends of the two bending arms at the bottom of the pi-shaped groove are in a gradual-change ladder-shaped structure, and the L-shaped grooves are symmetrically arranged on the opposite inner sides of the two bending arms of the pi-shaped groove; and respectively welding a coaxial line core and a shielding layer of the antenna at the middle position of the cross arm of the pi-shaped groove as a feed point.

Further, the metal unit of the metal radiation patch layer is octagonal.

Further, the metal radiation patch layer has 25 octagonal metal units and is regularly arranged in a 5*5 matrix manner.

Further, the metal stratum and the metal radiation patch layer are arranged in a central alignment manner through a geometric center point.

Further, the first dielectric substrate is glass.

Further, the second dielectric substrate is PVB glue.

Further, the third dielectric substrate is glass.

Further, the metal radiation patch layer is formed of a copper material.

Further, the metal formation is formed from silver paste.

Further, the gradually-changed stepped structure is a deformed stepped structure gradually decreasing in height toward the tip.

According to the technical scheme, the L-shaped groove and the gradual change ladder-shaped groove are adopted, so that the radiation bandwidth of the antenna can be expanded; the 25 metals are regularly arranged in a 5*5 matrix mode, so that the distribution of fields above the antenna can be changed, the radiation wave speed is converged, the gain of the antenna is improved, the super-surface units are separated by a certain distance, an LC loop is formed among the units, the antenna matching is improved, and the antenna bandwidth is expanded. The antenna has the advantages of low section, wide bandwidth, high gain and small size, and can be perfectly fused with automobile glass.

Drawings

The utility model is described in further detail below with reference to the drawings and detailed description;

FIG. 1 is a perspective view of an antenna according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a metal radiating patch layer according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a metal formation according to an embodiment of the present utility model;

FIG. 4 is a graph showing simulation results of reflection coefficients of an antenna according to an embodiment of the present utility model;

fig. 5 is an XOZ-plane pattern of an antenna at freq=5.84 GHz in an embodiment of the utility model;

fig. 6 is a YOZ-plane pattern of an antenna at freq=5.84 GHz in an embodiment of the present utility model;

in the figure: the antenna comprises a 1-dielectric substrate, a 2-dielectric substrate, a 3-metal radiation patch layer, a 4-dielectric substrate, a 5-metal stratum, a 6- 'pi' groove, a 7-deformation stepped structure groove, an 8- 'L' groove, a 9-coaxial line and a 10-octagonal metal unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

As shown in one of fig. 1 to 6, the present utility model discloses a conformal antenna applied to an automotive glass, which comprises a first substrate 1, a second substrate 2, a metal radiating patch layer, a third substrate 3 and a metal ground layer; the metal radiation patch layer and the metal stratum are respectively positioned at two sides of the glass substrate 3, and the second substrate 2 is PVB glue which can tightly bond the substrate 1, the glass substrate 3 and the metal radiation patch layer into a whole; the metal radiation patch layer 3 is regularly arranged by 25 octagonal metal units according to a 5*5 matrix mode; the centers of the metal stratum and the metal radiation patch layer are aligned, and a pi-shaped groove is formed in the metal stratum; the tail ends of the pi-shaped grooves are distributed in a gradual-change step shape, and L-shaped grooves are symmetrically formed on the pi-shaped arms; respectively welding a coaxial line core and a shielding layer at the middle position of a cross arm of the pi-shaped groove;

as shown in fig. 2, in this embodiment, the metal radiation patch layer is arranged by 25 metal units according to a manner of 5*5, and a certain distance is formed between each unit, and by this arrangement, the metal radiation patch layer forms a super-surface structure, and the super-surface structure can converge radiation beams and change the field distribution above the antenna, so that the gain of the antenna can be improved. The ultra-surface units are separated by a certain distance, an LC loop is formed among the units, the antenna matching is improved, and the bandwidth of the antenna is expanded.

As shown in fig. 3, a pi-shaped slot is formed in the metal stratum, the cross arm side of the pi-shaped slot is welded with a coaxial line feed, an electric signal is fed by the coaxial line, when the electric signal passes through the slot, the electromagnetic wave leaks between the antenna radiating unit and the ground through the slot, oscillates between the radiating unit and the ground, and is radiated out at the side end of the radiating unit. The tail end of the bending arm of the pi-shaped groove is in a gradual change shape step shape, and the gradual change shape step shape can effectively improve the impedance of the antenna and improve the radiation bandwidth of the antenna. The L-shaped branch joint groove is formed on the inner side of the bending arm of the pi-shaped groove, so that the radiation path of electromagnetic waves can be increased, the frequency point is increased, and the bandwidth of the antenna can be expanded due to the adjacent 2 frequency points;

preferably, in the present embodiment, the first dielectric substrate 1 is glass.

Preferably, in this embodiment, the second dielectric substrate 2 is PVB glue.

Preferably, in the present embodiment, the third dielectric substrate 3 is glass.

Preferably, in the present embodiment, the metal radiating patch layer is molded from a copper material.

Preferably, in this embodiment, the metal formation is formed from silver paste.

According to the technical scheme, the metal unit matrixes which are regularly arranged in the 5*5 matrix can realize efficient radiation, the metal units are octagons, LC loops are formed by coupling the units, and the bandwidth is improved; the metal stratum is provided with a pi-shaped groove to realize slot coupling feed, the tail end of the pi-shaped groove is gradually stepped to increase a current path, and the bandwidth of the antenna is increased; the L-shaped groove is formed in the vertically opposite inner side wall of the bending arm of the pi-shaped groove, so that new resonance frequency points can be added, 2 frequency points are adjacent, and the bandwidth of the antenna can be effectively increased. The antenna has good performance, low profile, small size and attractive appearance, can be well conformal with glass, is not influenced by background environment, and can effectively provide wireless transmission performance of automobiles.

It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. Embodiments of the utility model and features of the embodiments may be combined with each other without conflict. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the utility model is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Claims

1. A conformal antenna for use on automotive glass, characterized by: the metal radiation patch comprises a first base material, a second base material, a metal radiation patch layer, a third base material and a metal stratum which are sequentially arranged from bottom to top; the metal radiation patch layer comprises a plurality of metal units which are arranged in a matrix, wherein the metal units are mutually arranged at intervals to form a super-surface structure so as to converge radiation beams; the metal stratum is provided with a pi-shaped groove; the tail ends of the two bending arms at the bottom of the pi-shaped groove are in a gradual-change ladder-shaped structure, and the L-shaped grooves are symmetrically arranged on the opposite inner sides of the two bending arms of the pi-shaped groove; and respectively welding a coaxial line core and a shielding layer of the antenna at the middle position of the cross arm of the pi-shaped groove as a feed point.

2. A conformal antenna for use on automotive glass according to claim 1, wherein: the metal units of the metal radiation patch layer are octagons.

3. A conformal antenna for use on automotive glass according to claim 1 or 2, wherein: the metal radiation patch layer has 25 octagonal metal units and is regularly arranged in a 5*5 matrix manner.

4. A conformal antenna for use on automotive glass according to claim 1, wherein: the metal stratum and the metal radiation patch layer are arranged in a central alignment manner through a geometric center point.

5. A conformal antenna for use on automotive glass according to claim 1, wherein: the first dielectric substrate is glass; the second medium substrate is PVB glue; the third dielectric substrate is glass.

6. A conformal antenna for use on automotive glass according to claim 1, wherein: the metal radiation patch layer is formed by copper materials.

7. A conformal antenna for use on automotive glass according to claim 1, wherein: the metal formation is formed from silver paste.

8. A conformal antenna for use on automotive glass according to claim 1, wherein: the gradually deforming step-like structure is a deforming step-like structure gradually decreasing in height toward the tip.