A miniaturized, broadband, high-gain millimeter-wave horn antenna

Abstract

The invention discloses a miniaturized wide-band high-gain millimeter-wave horn antenna, comprising a horn-shaped antenna body, the length of the antenna body is 38 mm, a waveguide opening is arranged at one end of the antenna body, and a horn mouth connected to the waveguide opening is arranged at the other end of the antenna body, the length of the waveguide opening is 7.11 mm, and the width is 3.56 mm; the length of the horn mouth is 20 mm, and the width is 10 mm; the frequency band of the miniaturized wide-band high-gain millimeter-wave horn antenna provided by the invention covers 20-80 GHz, the gain reaches 12 dBi in the 20 GHz frequency band, the gain reaches 15 dBi in the 40 GHz frequency band, and the gain reaches 18 dBi in the 70 GHz frequency band, covering the current mainstream millimeter-wave application frequency band, and having a wide application range.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a miniaturized, broadband, high-gain millimeter-wave horn antenna. Background Art

[0002] In recent years, with the development of economy, the traffic demand has been increasing day by day, and urban traffic congestion and frequent traffic accidents have become common problems faced by countries around the world. Analysis of highway traffic accidents shows that among the three links of driver, car and road, the driver is the link with the weakest reliability. Therefore, in recent years, driverless cars that replace drivers have been born. Self-driving cars, also known as driverless cars and computer-driven cars, are intelligent cars that achieve unmanned driving through computer systems.

[0003] In order to improve the safety of self-driving cars, they rely on artificial intelligence, visual computing, radar, monitoring devices and global positioning systems to work together, so that computers can automatically and safely operate motor vehicles without any human active operation. Therefore, self-driving cars need systems that can judge the driving conditions of the car, predict the safety of the vehicle, automatically take measures to prevent traffic accidents, and reduce the probability of accidents, such as lane departure systems, forward vehicle collision warning systems, forward obstacle avoidance assistance systems, and driver attention monitoring. Among them, car anti-collision radar is one of the most important sensors for self-driving cars. This is mainly because car anti-collision radar is an active safety device that can accurately measure the speed and distance of surrounding targets, as well as the azimuth of the target, etc. It can accurately detect potential dangers of unmanned vehicles during driving, and automatically take measures to eliminate dangers based on the obstacle information detected by the radar.

[0004] The distance measurement methods currently used in automobiles mainly include laser distance measurement, ultrasonic distance measurement, infrared distance measurement, millimeter wave radar distance measurement and other methods. Optical technologies such as infrared and cameras are cheap and simple in technology, but they do not work well in all weather conditions and have limited anti-collision performance; ultrasonic waves are greatly affected by weather conditions and have a short detection distance. Millimeter wave radar overcomes the shortcomings of the above detection methods and has stable detection performance and good environmental applicability; in actual applications, how to achieve miniaturization, high gain and wide bandwidth of millimeter wave antennas has become a difficulty that needs to be overcome in actual applications. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a miniaturized, wide-band, high-gain millimeter-wave horn antenna.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a miniaturized wide-band high-gain millimeter-wave horn antenna, comprising a horn-shaped antenna body, the length of the antenna body is 38mm, a waveguide opening is provided at one end of the antenna body, and a horn mouth connected to the waveguide opening is provided at the other end of the antenna body, the length of the waveguide opening is 7.11mm, and the width is 3.56mm; the length of the horn mouth is 20mm, and the width is 10mm.

[0007] The beneficial effects of the present invention are as follows: the frequency band of the miniaturized wide-band high-gain millimeter-wave horn antenna provided by the present invention covers 20-80 GHz, the gain reaches 12dBi in the 20GHz frequency band, the gain reaches 15dBi in the 40GHz frequency band, and the gain reaches 18dBi in the 70GHz frequency band, covering the current mainstream millimeter-wave application frequency bands and having a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic structural diagram of a miniaturized wide-band high-gain millimeter-wave horn antenna according to an embodiment of the present invention;

[0009] Figure 2 An exploded view of a miniaturized wide-band high-gain millimeter-wave horn antenna according to an embodiment of the present invention;

[0010] Figure 3 A return loss diagram of a miniaturized wide-band high-gain millimeter-wave horn antenna according to an embodiment of the present invention;

[0011] Figure 4 The 3D radiation pattern of the miniaturized wide-band and high-gain millimeter-wave horn antenna at a frequency of 26 GHz according to an embodiment of the present invention;

[0012] Figure 5 The 2D radiation pattern of the miniaturized wide-band and high-gain millimeter-wave horn antenna at 26 GHz frequency according to an embodiment of the present invention;

[0013] Figure 6 The 3D radiation pattern of the miniaturized wide-band and high-gain millimeter-wave horn antenna at 30 GHz frequency according to an embodiment of the present invention;

[0014] Figure 7 The 2D radiation pattern of the miniaturized wide-band and high-gain millimeter-wave horn antenna at a frequency of 30 GHz according to an embodiment of the present invention;

[0015] Figure 8 The 3D radiation pattern of the miniaturized wide-band and high-gain millimeter-wave horn antenna at a frequency of 40 GHz according to an embodiment of the present invention;

[0016] Fig. 9The 2D radiation pattern of the miniaturized wide-band and high-gain millimeter-wave horn antenna at a frequency of 40 GHz according to an embodiment of the present invention;

[0017] Fig.10 The 3D radiation pattern of the miniaturized wide-band and high-gain millimeter-wave horn antenna at 77 GHz frequency according to an embodiment of the present invention;

[0018] Fig.11 This is the 2D radiation pattern of the miniaturized wide-band and high-gain millimeter-wave horn antenna at a frequency of 77 GHz according to an embodiment of the present invention.

[0019] Description of labels:

[0020] 1. Antenna body; 11. First radiator; 111. Waveguide opening; 12. Second radiator; 121. Horn opening; 13. Mounting part; 2. Waveguide tube; 3. SMA connector. DETAILED DESCRIPTION

[0021] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0022] Please refer to Figures 1 to 11 A miniaturized, wide-band, high-gain millimeter-wave horn antenna comprises a horn-shaped antenna body 1, the length of the antenna body 1 is 38 mm, a waveguide opening 111 is arranged at one end of the antenna body 1, and a horn mouth 121 connected to the waveguide opening 111 is arranged at the other end of the antenna body 1, the length of the waveguide opening 111 is 7.11 mm, and the width is 3.56 mm; the length of the horn mouth 121 is 20 mm, and the width is 10 mm.

[0023] From the above description, it can be seen that the beneficial effect of the present invention is that by setting the size of the antenna body 1, the frequency band of this miniaturized wide-band and high-gain millimeter-wave horn antenna covers 20-80GHz, the gain reaches 12dBi in the 20GHz band, the gain reaches 15dBi in the 40GHz band, and the gain reaches 18dBi in the 70GHz band, covering the current mainstream millimeter-wave application frequency bands and having a wide range of applications.

[0024] Furthermore, the antenna body 1 includes a first radiator 11 and a second radiator 12 that are connected, the waveguide mouth 111 is arranged at an end of the first radiator 11 away from the second radiator 12, and the trumpet mouth 121 is arranged at an end of the second radiator 12 away from the first radiator 11; the first radiator 11 is in the shape of a rectangular pipe, the second radiator 12 is in the shape of a pyramid, and the large end opening of the second radiator 12 is the trumpet mouth 121.

[0025] Furthermore, the antenna body 1 is an integrally formed one-piece structure.

[0026] It can be seen from the above description that the antenna body 1 has a simple structure, is easy to manufacture and has a low production cost.

[0027] Furthermore, it also includes a waveguide tube 2 connected to the antenna body 1 , and one end of the waveguide tube 2 is connected to the waveguide port 111 .

[0028] Furthermore, the antenna body 1 is also provided with a mounting portion 13 for mounting the waveguide tube 2 .

[0029] It can be seen from the above description that the mounting portion 13 facilitates the installation of the waveguide 2 .

[0030] Furthermore, the waveguide 2 is mounted on the mounting portion 13 by means of bolts.

[0031] It can be seen from the above description that the connection method between the mounting portion 13 and the waveguide 2 can be set according to actual application requirements.

[0032] Furthermore, the other end of the waveguide 2 is provided with an SMA connector 3 .

[0033] Embodiment 1

[0034] Please refer to Figures 1 to 11 Embodiment 1 of the present invention is: a miniaturized wide-band high-gain millimeter-wave horn antenna, comprising a horn-shaped antenna body 1, the length of the antenna body 1 is 38 mm, one end of the antenna body 1 is provided with a waveguide opening 111, the other end of the antenna body 1 is provided with a horn opening 121 connected to the waveguide opening 111, the length of the waveguide opening 111 is 7.11 mm, and the width is 3.56 mm; the length of the horn opening 121 is 20 mm, and the width is 10 mm; specifically, the antenna body 1 comprises a first radiator 11 and a second radiator 12 connected to each other, the waveguide opening 111 is provided at the first radiator 111, and the second radiator 12 is provided at the second radiator 121. A radiator 11 is away from one end of the second radiator 12, and the horn mouth 121 is arranged at the end of the second radiator 12 away from the first radiator 11; the first radiator 11 is in the shape of a rectangular pipe, the second radiator 12 is in the shape of a pyramid, and the large end opening of the second radiator 12 is the horn mouth 121; in detail, the antenna body 1 is an integrated structure formed in one piece, and the miniaturized wide-band high-gain millimeter-wave horn antenna also includes a waveguide tube 2 connected to the antenna body 1, one end of the waveguide tube 2 is connected to the waveguide mouth 111, and the other end of the waveguide tube 2 is provided with an SMA connector 3.

[0035] In this embodiment, the antenna body 1 is also provided with a mounting portion 13 for mounting the waveguide tube 2, so that the waveguide tube 2 can be easily installed. The waveguide tube 2 is installed on the mounting portion 13 by bolts. The connection method between the mounting portion 13 and the waveguide tube 2 can be set according to actual application requirements.

[0036] In summary, the frequency band of the miniaturized wide-band and high-gain millimeter-wave horn antenna provided by the present invention covers 20-80 GHz, with a gain of 12 dBi in the 20 GHz band, 15 dBi in the 40 GHz band, and 18 dBi in the 70 GHz band, covering the current mainstream millimeter-wave application frequency bands and having a wide range of applications.

[0037] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A miniaturized, broadband, high-gain millimeter-wave horn antenna, characterized in that: The invention comprises a horn-shaped antenna body (1), wherein the length of the antenna body (1) is 38 mm, a waveguide opening (111) is provided at one end of the antenna body (1), and a horn opening (121) connected to the waveguide opening (111) is provided at the other end of the antenna body (1), wherein the length of the waveguide opening (111) is 7.11 mm and the width is 3.56 mm; the length of the horn opening (121) is 20 mm and the width is 10 mm; the antenna body (1) comprises a first radiator (11) and a second radiator (12) connected to each other, the waveguide opening (111) being arranged away from the first radiator (11). At one end of the second radiator (12), the horn mouth (121) is provided at an end of the second radiator (12) away from the first radiator (11); the first radiator (11) is in the shape of a rectangular pipe, the second radiator (12) is in the shape of a pyramid, and the large end opening of the second radiator (12) is the horn mouth (121); the antenna body (1) is an integrally formed one-piece structure; and further comprises a waveguide tube (2) connected to the antenna body (1), one end of the waveguide tube (2) being butt-jointed with the waveguide mouth (111), and the other end of the waveguide tube (2) being provided with an SMA connector (3); The antenna body (1) is further provided with a mounting portion (13) for mounting the waveguide tube (2), so as to facilitate mounting of the waveguide tube (2); the waveguide tube (2) is mounted on the mounting portion (13) by means of bolts; The frequency band of the above-mentioned miniaturized wide-band high-gain millimeter-wave horn antenna covers 20-80 GHz, with a gain of 12dBi in the 20GHz band, 15dBi in the 40GHz band, and 18dBi in the 70GHz band.

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