Comb antenna, electronic equipment and radar system

Abstract

The embodiment of the invention relates to the technical field of communication, and particularly discloses a comb-shaped antenna which comprises a dielectric plate and a comb-shaped antenna array, the comb-shaped antenna array is arranged on the dielectric plate and comprises an array feeder line, a plurality of first array elements and a plurality of second array elements, the plurality of first array elements are arranged and distributed on one side of the array feeder line, and the plurality of second array elements are arranged and distributed on the other side of the array feeder line. The plurality of second array elements are arranged and distributed on the other side of the array feeder line, and the plurality of first array elements and the plurality of second array elements are inclined towards one end of the array feeder line at the same angle. Through the above mode, the passive structure correction method is adopted in the embodiment of the invention, the installation inclination angles of the array elements are adjusted, the end-fire effect of the antenna array and the mutual coupling influence between the array elements are reduced, the beam main lobe is corrected to the normal direction of the antenna, and the accuracy of accurate communication is improved; the beam direction can be corrected without adding an extra external source feed network or a correction algorithm, the complexity of an antenna system is reduced, the environmental adaptability and stability are improved, and the production and maintenance cost is reduced.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communication technology, and in particular to a comb antenna, electronic device and radar system. Background Technology

[0002] Comb antennas are widely used in wireless communication and radar systems due to their simple structure, ease of manufacture, and good directional radiation characteristics. Please refer to [reference needed]. Figure 1 and Figure 2 Traditional comb antenna arrays typically arrange their radiating elements perpendicular to the array feed line. However, due to end-fire effects and mutual coupling between elements, the main lobe direction of the radiated beam often shifts and does not strictly point towards the array's normal direction. This beam shift reduces the antenna's effective coverage area, leading to signal strength attenuation and system performance degradation in applications requiring precise alignment (such as point-to-point communication and radar detection).

[0003] In the process of realizing this invention, the inventors discovered that in order to correct this beam offset, a complex feed network is usually used for phase compensation or a digital beamforming algorithm is used for correction. However, these correction methods greatly increase the complexity of the antenna system, reduce the stability of system operation, and increase production and maintenance costs. Summary of the Invention

[0004] The main technical problem solved by the embodiments of the present invention is to provide a comb antenna, electronic device and radar system that can correct the main lobe direction of the beam without increasing the complexity of the antenna system, thereby improving environmental adaptability and stability and reducing production and maintenance costs.

[0005] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a comb antenna, including a dielectric substrate and a comb antenna array, wherein the comb antenna array is disposed on the dielectric substrate, and the comb antenna array includes an array feed line, a plurality of first array elements and a plurality of second array elements, wherein the plurality of first array elements are arranged and distributed on one side of the array feed line, and the plurality of second array elements are arranged and distributed on the other side of the array feed line, wherein the plurality of first array elements and the plurality of second array elements are all tilted toward one end of the array feed line at the same angle.

[0006] Optionally, the angle between each of the first array elements and the array feed line and the angle between each of the second array elements and the perpendicular line to the array feed line are both 15 degrees.

[0007] Optionally, the spacing between any two adjacent first array elements is the same, the spacing between any two adjacent second array elements is the same, and the spacing between any two adjacent first array elements is the same as the spacing between any two adjacent second array elements.

[0008] Optionally, the plurality of first array elements and the plurality of second array elements are alternately arranged on both sides of the array feed line, and the spacing between any adjacent first array elements and second array elements is the same.

[0009] Optionally, the first array element and the second array element have the same shape and structure.

[0010] Optionally, both the first array element and the second array element are rectangular in shape.

[0011] Optionally, the array element width of the first array element and the second array element is 0.38 mm, the feed line width of the array feed line is 0.1 mm, and the array element spacing between any two adjacent first array elements or any two adjacent second array elements is 1.7 mm.

[0012] Optionally, the dielectric constant of the dielectric substrate is 2.2, the loss tangent is 0.0009, and the thickness is 0.127 mm.

[0013] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is to provide an electronic device including the above-mentioned comb antenna.

[0014] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is to provide a radar system, including the above-mentioned electronic equipment.

[0015] The beneficial effects of this invention are as follows: Unlike existing technologies, this invention provides a comb antenna, including a dielectric substrate and a comb antenna array. The comb antenna array is disposed on the dielectric substrate and includes an array feed line, a plurality of first array elements, and a plurality of second array elements. The first array elements are arranged on one side of the array feed line, and the second array elements are arranged on the other side of the array feed line. Both the first and second array elements are tilted at the same angle towards one end of the array feed line. By employing a passive structure correction method, the end-fire effect of the antenna array and the mutual coupling effect between array elements can be reduced simply by adjusting the installation tilt angle of the array elements. The main lobe of the beam is corrected to the normal direction of the antenna without the need for an additional external feed network or correction algorithm to correct the beam direction. This reduces the complexity of the antenna system, improves environmental adaptability and stability, and reduces production and maintenance costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0017] Figure 1 This is a structural diagram of a comb antenna in the existing technology; Figure 2 This is a simulation diagram of the beam radiation of a comb antenna in existing technology; Figure 3 This is a structural diagram of the comb antenna provided in an embodiment of the present invention; Figure 4 This is a front view of the comb antenna provided in an embodiment of the present invention; Figure 5 This is a simulation diagram of the beam radiation of the comb antenna provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the dimensions of the comb antenna array provided in an embodiment of the present invention; Figure 7 This is a comparison diagram of the beam radiation direction of a prior art comb antenna of the same size and the antenna of this invention.

[0018] Explanation of reference numerals in the attached figures: 100 comb antenna; 1. Comb antenna array, 11. Array feed line, 12. First array element, 13. Second array element; 2 dielectric substrates; X-axis array element arrangement direction, Y-axis array axis direction, and Z-axis array surface normal direction. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0021] This invention provides an embodiment of a comb antenna 100, which can correct the direction of the main lobe of the beam by simply adjusting the tilt angle of the array elements without adding an external feed network or correction algorithm, thereby reducing the complexity of the antenna system, improving environmental adaptability and stability, and reducing production and maintenance costs.

[0022] To facilitate the reader's understanding of the concept of the embodiments of the present invention, the specific structure of the comb antenna 100 is described below: Please see Figures 3 to 5 The comb antenna 100 includes a dielectric substrate 2 and a comb antenna array 1. The dielectric substrate 2 is made of a high-frequency dielectric material with a dielectric constant of 2.2, a loss tangent of 0.0009, and a thickness of 0.127 mm. The comb antenna array 1 is disposed on the dielectric substrate 2 and includes an array feed line 11, a plurality of first array elements 12, and a plurality of second array elements 13. The plurality of first array elements 12 are arranged on one side of the array feed line 11, and the plurality of second array elements 13 are arranged on the other side of the array feed line 11. The first array elements 12 and the second array elements 13 are tilted toward the array feed line 11, and the tilt angles of the first array elements 12 and the second array elements 13 with the array feed line 11 are the same. The angle between the first array element 12 or the second array element 13 and the perpendicular line to the array feed line 11 is defined as the tilt angle θ. By tilting the first array element 12 and the second array element 13 toward the array feed line 11, the maximum radiation direction of a single array element deviates from the array axis direction Y, that is, from the direction perpendicular to the array feed line 11. Therefore, the superposition intensity of the radiation signal in the array axis direction Y in the far field is greatly reduced, thereby weakening the end-radiation effect. At the same time, the tilting of the array elements prevents the electromagnetic field of a single array element from directly impacting adjacent array elements, thus weakening the interference between adjacent array elements and reducing the mutual coupling effect between array elements.

[0023] This invention does not limit the tilt angle θ; in some embodiments, the tilt angle θ is 15 degrees. The following explanation uses a tilt angle θ of 15 degrees as an example: For the comb antenna array 1 described above, the first array element 12 and the second array element 13 are rectangular units with the same shape. Several first array elements 12 and several second array elements 13 are arranged at equal intervals, and the spacing between any adjacent first array element 12 and second array element 13 is the same.

[0024] Please see Figure 6 The first array element 12 and the second array element 13 of the present invention have an array element width of w=0.38mm, an array element spacing of d=1.7mm, and an array feed line width of f=0.1mm.

[0025] Please see Figure 7 , Figure 7This diagram compares the beam radiation directions of two comb antennas 100 of the same size. The waveforms shown are those of the main radiation plane, i.e., the waveforms on the plane formed by the element arrangement direction X and the array surface normal direction Z. The solid line represents the comb antenna 100 of this embodiment, and the dashed line represents the comb antenna 100 of the prior art. m1 is the main lobe direction of the beam radiation of the prior art antenna, and m2 is the main lobe direction of the beam radiation of the antenna of this embodiment. The circular coordinates of the graph represent different angles, where 0 represents the array surface normal direction Z of the antenna. The radial parameter of the graph is the gain value Mag, in dB. As can be seen from the figure, the offset angle between the main lobe direction of the beam radiation of the prior art antenna and the array surface normal direction Z is -8 degrees, while the offset angle between the main lobe direction of the beam radiation of the antenna of this embodiment and the array surface normal direction Z is 0 degrees. That is, after setting the tilt angle θ of the first array element 12 and the second array element 13 to 15 degrees, the main lobe direction of the beam radiation of the comb antenna 100 coincides with the array surface normal direction Z. Meanwhile, the peak gain of the antenna in this embodiment of the invention and the antenna in the prior art are both around 13.7, indicating that after tilting the first array element 12 and the second array element 13, the gain performance of the antenna in this embodiment of the invention does not change, and the tilting of the array elements does not have an adverse effect on the gain performance of the antenna.

[0026] In this embodiment of the invention, the comb antenna 100 includes a dielectric substrate 2 and a comb antenna array 1. The comb antenna array 1 is disposed on the dielectric substrate 2 and includes an array feed line 11, a plurality of first array elements 12, and a plurality of second array elements 13. The plurality of first array elements 12 are arranged on one side of the array feed line 11, and the plurality of second array elements 13 are arranged on the other side of the array feed line 11. The plurality of first array elements 12 and the plurality of second array elements 13 are all tilted toward one end of the array feed line 11 at the same angle. By adopting a passive structure correction method, the end-fire effect of the comb antenna array 1 and the mutual coupling effect between array elements can be reduced simply by adjusting the installation tilt angle of the array elements. The main lobe of the beam is corrected to the normal direction Z of the antenna array surface. No additional external feed network or correction algorithm is required to correct the beam direction, which reduces the complexity of the antenna system, improves environmental adaptability and stability, and reduces production and maintenance costs.

[0027] The present invention provides an embodiment of an electronic device, which includes the comb antenna 100 described above. The structure and function of the comb antenna 100 can be referred to the above embodiment, and will not be repeated here.

[0028] The present invention also provides an embodiment of a radar system, which includes the electronic equipment described above. The structure and function of the electronic equipment can be referred to the above embodiments, and will not be repeated here.

[0029] It should be noted that while the preferred embodiments of the present invention are given in the specification and accompanying drawings, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of the present invention; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of the present invention. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of the present invention specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A comb antenna, characterized in that, include: Medium plate; A comb antenna array is disposed on the dielectric substrate. The comb antenna array includes an array feed line, a plurality of first array elements and a plurality of second array elements. The plurality of first array elements are arranged on one side of the array feed line, and the plurality of second array elements are arranged on the other side of the array feed line. The plurality of first array elements and the plurality of second array elements are all tilted toward one end of the array feed line at the same angle.

2. The comb antenna according to claim 1, characterized in that, The angle between each of the first array elements and the array feed line and the angle between each of the second array elements and the perpendicular line to the array feed line are both 15 degrees.

3. The comb antenna according to claim 2, characterized in that, The spacing between any two adjacent first array elements is the same, the spacing between any two adjacent second array elements is the same, and the spacing between any two adjacent first array elements is the same as the spacing between any two adjacent second array elements.

4. The comb antenna according to claim 3, characterized in that, The plurality of first array elements and the plurality of second array elements are alternately arranged on both sides of the array feed line, and the spacing between any adjacent first array elements and second array elements is the same.

5. The comb antenna according to claim 4, characterized in that, The first array element and the second array element have the same shape and structure.

6. The comb antenna according to claim 5, characterized in that, Both the first array element and the second array element are rectangular in shape.

7. The comb antenna according to claim 6, characterized in that, The array element width of the first array element and the second array element is 0.38 mm, the feed line width of the array feed line is 0.1 mm, and the array element spacing between any two adjacent first array elements or any two adjacent second array elements is 1.7 mm.

8. The comb antenna according to any one of claims 1-7, characterized in that, The dielectric substrate has a dielectric constant of 2.2, a loss tangent of 0.0009, and a thickness of 0.127 mm.

9. An electronic device, characterized in that, Includes the comb antenna as described in any one of claims 1-8.

10. A radar system, characterized in that, Includes the electronic device as described in claim 9.

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