CN212676463U

CN212676463U - Antenna feed structure, vehicle radar antenna, vehicle radar and car

Info

Publication number: CN212676463U
Application number: CN202021273835.1U
Authority: CN
Inventors: 陆慧颖; 叶秀美; 周立夫
Original assignee: Nanjing Desai Xiwei Automobile Electronics Co ltd
Current assignee: Nanjing Desai Xiwei Automobile Electronics Co ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-03-09
Anticipated expiration: 2030-07-02

Abstract

The utility model relates to a technical field is markd to the car panorama, especially relates to antenna feed structure, on-vehicle radar antenna, on-vehicle radar and car. The antenna comprises a substrate, a chip, a substrate, a chip and a power supply, wherein the substrate is used for realizing feed connection between the antenna on the substrate and the; the SIW feeder line is arranged on the medium substrate in a bending mode, the metal through holes at the bending position are arranged in an arc mode at a certain angle, and the SIW feeder line replaces the bending angle matching holes of the SIW feeder line through the arc arrangement structure of the metal through holes at the bending position. The utility model discloses not establishing matching hole or dog-ear hole in the department of bending, but the metal through-hole that will bend the department carries out the arc of specific radian and arranges to through the radian radius of control department of bending, reduce the reflection of electromagnetic wave in the department of bending, with the transmission performance of guaranteeing the SIW feeder, it is strict to the processing technology requirement when avoiding the SIW feeder to set up the matching hole.

Description

Antenna feed structure, vehicle radar antenna, vehicle radar and car

Technical Field

The utility model relates to a technical field is markd to the car panorama, especially relates to antenna feed structure, on-vehicle radar antenna, on-vehicle radar and car.

Background

With the development of the automobile industry and the improvement of the living standard of people, the transmission rate of wireless communication and the resolution of radar are increasingly improved, and the automobile anti-collision radar becomes an automobile standard. Currently, as a research hotspot of various large automobile manufacturers, an antenna of a 77GHz vehicle-mounted radar generally adopts a serial feed microstrip antenna form, and a microstrip feed network is widely applied due to the advantages of low manufacturing cost, low loss, flexible routing and the like of a microstrip structure, but the radiation characteristic of the microstrip feed network can raise a side lobe of the antenna, and the side lobe is difficult to optimize only by adjusting the size.

At present, the antenna of automobile anti-collision radar mostly adopts microstrip feed network, and the radiation characteristic of microstrip feed network can deteriorate the antenna directional diagram, mainly shows for raising antenna side lobe level, and the side lobe after raising is difficult to improve through optimizing antenna size or microstrip size by a wide margin. Of course, other feeders are used for feeding the antenna, but the bending angle cannot be effectively matched when the antenna is bent, and additional bending matching is needed, so that the requirement of the bending matching on the processing technology is high, and the fluctuation of the product performance is easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome above-mentioned prior art at least one kind defect (not enough), provide an antenna feed structure, on-vehicle radar antenna, on-vehicle radar and car.

In order to solve the technical problem, the technical scheme of the utility model as follows:

an antenna feed structure for realizing the feed connection between the antenna and the chip on the dielectric Substrate comprises a Substrate Integrated Waveguide (SIW) feed line; the SIW feeder line is arranged on the medium substrate in a bending mode, the metal through holes at the bending positions are arranged in an arc mode at a certain angle, and the SIW feeder line replaces the bending angle matching holes of the SIW feeder line through the arc arrangement structure of the metal through holes at the bending positions.

Furthermore, at least two bending parts are arranged at the bending part of the SIW feeder line.

Further, the SIW feed line comprises a first bend and a second bend; the first bending part and the second bending part are opposite in bending direction, and the extension direction of the SIW feeder before bending is the same as that of the SIW feeder after bending.

Furthermore, the metal through holes on the side of the SIW feeder line bending part bent at a large angle are arranged in an arc shape, and the metal through holes on the side bent at a small angle are arranged in a bevel shape.

Further, the bending angle range of the SIW feeder line is 0-90 degrees.

The utility model also provides a vehicle-mounted radar antenna device, which comprises an antenna, a medium substrate and a chip; the antenna adopts the antenna feed structure to be in feed connection with the chip on the dielectric substrate.

Furthermore, the frequency range of the antenna is 76-77 GHz.

The embodiment provides a vehicle-mounted radar, which comprises the vehicle-mounted radar antenna device.

In addition, this embodiment still provides an automobile, includes foretell vehicle radar.

The utility model discloses matching hole or dog-ear hole are not established in the department of bending, but the metal through-hole that will bend the department carries out the arc of specific radian and arranges, and the radian radius of department of buckling through the control, reduce the reflection of electromagnetic wave in the department of buckling, with the transmission performance who guarantees SIW feeder, and can avoid SIW feeder to require strictly to the processing technology when setting up the matching hole, and in case matching hole machining error is slightly bigger, can lead to transmission loss very big, influence the condition of the performance problem of whole antenna, thereby effectively simplify the manufacturing cost of SIW feeder, improve its qualification rate, guarantee the quality of product.

Drawings

Fig. 1 is a diagram comparing the conventional layout scheme of SIW with the structure of the antenna feed structure according to the embodiment of the present invention.

Fig. 2 is the utility model discloses return loss and transmission loss effect schematic diagram of antenna feed structure.

Fig. 3 is the return loss and transmission loss effect schematic diagram of the conventional bending structure of SIW of the present invention.

Fig. 4 is the utility model discloses on-vehicle radar antenna device's structural schematic.

Fig. 5 is a schematic structural diagram of a SIW feed line on a dielectric substrate according to an embodiment of the present invention.

Wherein:

the SIW feeder line is 1, the bending part is 11, and the matching hole is 12;

the antenna is 2 and the chip is 3.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Examples

Fig. 1 is a diagram comparing the conventional layout scheme of SIW with the structure of the antenna feed structure according to the embodiment of the present invention; wherein, 1a is the conventional overall arrangement scheme of SIW, and 1b is the structure contrast diagram of the antenna feed structure of the embodiment of the utility model.

The present embodiment provides an antenna feeding structure, which is mainly used for implementing a feeding connection between an antenna 2 and a chip 3 on a dielectric Substrate, and specifically, referring to fig. 1 and fig. 5, includes a Substrate Integrated Waveguide (SIW) feeder 1, which is used as a transmission line, disposed between pins of the antenna 2 and the chip 3 on the dielectric Substrate, and is used for implementing a feeding connection between the antenna 2 and the pins of the chip 3. Specifically, an array of metal through holes is arranged on the dielectric substrate, so that the SIW feeder 1 is formed, the SIW feeder 1 is bent on the dielectric substrate, and the metal through holes at the bent position are arranged in an arc shape at a certain angle. In this embodiment, the SIW feeder 1 does not need to be provided with the matching hole 12 at the bending position, but the matching hole 12 or the bevel hole commonly used for the SIW feeder 1 is replaced by the arc arrangement structure of the metal through holes at the bending position.

This scheme is mainly to the antenna 2 and uses SIW feeder 1 and the condition that needs the large-angle to bend, and about the benefit of this embodiment antenna feed structure, specifically, this embodiment adopts SIW feeder 1 to carry out the connection of antenna 2 and chip 3 pin on the dielectric substrate, can guarantee the influence of feed quality while reduction to antenna 2 side lobe. In the embodiment, the SIW is used for feeding instead of a conventional microstrip, so that the level of the antenna 2 side lobe is not raised, and the directional diagram of the antenna 2 is not deteriorated, thereby reducing the influence on the antenna 2 side lobe.

In the aspect of bending of the SIW feeder 1, in this embodiment, the matching holes 12 or the corner holes are not formed at the bending position, but the metal through holes at the bending position are arranged in an arc shape with a specific radian, and by controlling the radius of the radian at the bending position, the reflection of electromagnetic waves at the bending position is reduced, so as to ensure the transmission performance of the SIW feeder 1, and further, the problem that the requirement on the processing technology is strict when the SIW feeder 1 is provided with the matching holes 12 is avoided, and once the processing error of the matching holes 12 is slightly large, the transmission loss is very large, and the performance of the whole antenna 2 is affected is solved, so that the production cost of the SIW feeder 1 is effectively simplified, the qualification rate of the SIW.

For better use experience, return loss and transmission loss maps of the present embodiment scheme and the conventional scheme are provided. As shown in fig. 2-3, wherein fig. 2 is the return loss and transmission loss in the conventional case of the antenna feed structure of the present embodiment; fig. 3 is a return loss and transmission loss graph in the case where the matching hole 12 is conventionally provided and the position of the matching hole 12 is optimized.

In some embodiments, the bending point of the SIW feeder 1 is provided with at least two bending portions 11. Preferably, the SIW feed line 1 includes a first bend and a second bend; the bending directions of the first bending part and the second bending part are opposite, and the extending directions of the SIW feeder 1 before bending and after bending are the same. The bent SIW feeder 1 passes through the first bending part and the second bending part. Specifically, the SIW feeder 1 is bent twice, so that the antenna 2 and the chip 3 are ensured to be in feed connection through the SIW feeder 1 no matter how the relative positions are.

In some embodiments, the metal vias on the large-angle bending side of the bending part of the SIW feeder 1 are arranged in an arc shape, and the metal vias on the small-angle bending side are arranged in an angle. For example, if the SIW feeder 1 is bent to the right, the left side of the SIW feeder 1 is a large-angle bent side, and the right side of the bent portion is a small-angle bent side.

In some embodiments, the bending angle of the SIW feed 1 ranges from 0 to 90 degrees.

Fig. 4 is a schematic structural diagram showing the vehicle-mounted radar antenna device of the present embodiment.

As shown in fig. 4, this embodiment further provides a vehicle-mounted radar antenna device, which includes an antenna 2, a dielectric substrate, and a chip 3, where the antenna 2 is connected to the chip 3 on the dielectric substrate by using the above-mentioned antenna feeding structure, specifically, the antenna 2 is connected to a pin of the chip 3 through a SIW feeder 1, and thus, feeding and transmission of signals of the antenna 2 are completed.

In some embodiments, the antenna 2 of the present embodiment is applied in a frequency range of 76 to 77 GHz.

The embodiment also provides a vehicle-mounted radar which comprises the vehicle-mounted radar antenna device. Specifically, the radar is a vehicle-mounted anti-collision radar.

In addition, the embodiment also provides an automobile which comprises the vehicle-mounted radar.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An antenna feed structure is used for realizing feed connection between an antenna on a dielectric substrate and a chip and is characterized by comprising an SIW feed line; the SIW feeder line is arranged on the medium substrate in a bending mode, the metal through holes at the bending positions are arranged in an arc mode at a certain angle, and the SIW feeder line replaces the bending angle matching holes of the SIW feeder line through the arc arrangement structure of the metal through holes at the bending positions.

2. The antenna feed structure of claim 1, wherein the bending of the SIW feed line is provided with at least two bending portions.

3. The antenna feed structure of claim 2 wherein the SIW feed comprises a first bend and a second bend; the first bending part and the second bending part are opposite in bending direction, and the extension direction of the SIW feeder before bending is the same as that of the SIW feeder after bending.

4. The antenna feeding structure according to any one of claims 1 to 3, wherein the metal vias on the side of the large-angle bend of the SIW feeder bend are arranged in an arc shape, and the metal vias on the side of the small-angle bend are arranged in a bevel shape.

5. The antenna feed structure of any of claims 1-3, wherein the bending angle of the SIW feed line is in the range of 0-90 degrees.

6. A vehicle-mounted radar antenna device is characterized by comprising an antenna, a dielectric substrate and a chip; the antenna is connected with the chip on the dielectric substrate by adopting the antenna feed structure of any one of claims 1 to 5.

7. The vehicle-mounted radar antenna device according to claim 6, wherein the antenna frequency range is 76-77 GHz.

8. A vehicle radar, characterized by comprising a vehicle radar antenna device according to claim 6 or 7.

9. The vehicle radar of claim 8, wherein the vehicle radar is a vehicle collision avoidance radar.

10. An automobile characterized by comprising the vehicle-mounted radar of claim 8 or 9.