A microstrip antenna, radar and communication device

Abstract

The embodiment of the present application relates to the technical field of antenna, and discloses a microstrip antenna, the microstrip antenna includes dielectric substrate, radiation patch and ground sheet, the dielectric substrate is provided with first surface and second surface, the first surface and the second surface are oppositely arranged;The radiation patch is arranged on the first surface, and the radiation patch is provided with a plurality of first slits;The ground sheet is arranged on the second surface, and the ground sheet is provided with a plurality of second slits, wherein, in the direction from the first surface to the second surface, the radiation patch and the ground sheet overlap, and the vertical distance between the radiation patch and the ground sheet is less than 0.01 lambda. Through the above mode, the embodiment of the present application can realize the end-fire of the microstrip antenna.

Description

Technical Field

[0001] The present invention relates to the field of antennas, and in particular to a microstrip antenna, radar, and communication equipment. Background Technology

[0002] Compared to traditional antennas, microstrip antennas are not only small in size, light in weight, low in profile, and easy to conform to, but also easy to integrate, low in cost, and suitable for mass production. In addition, they also have the advantages of diverse electrical performance. Therefore, microstrip antennas have been widely used in communication devices such as smartphones, tablets, etc.

[0003] In the process of implementing the embodiments of the present invention, the inventors of the present invention discovered that: currently, the microstrip antennas on the market are typical side-fire antennas, and their microstrip beams basically cannot achieve end-fire. Summary of the Invention

[0004] The main technical problem solved by the embodiments of the present invention is to provide a microstrip antenna that, by setting a radiating patch and a grounding patch, wherein the radiating patch has a first gap and the grounding patch has a second gap, the radiating patch and the grounding patch overlap, and the vertical distance between the radiating patch and the grounding patch is less than 0.01λ, can realize end-fire of the microstrip antenna.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this embodiment of the invention is: providing a microstrip antenna, including a dielectric substrate, a radiating patch, and a grounding patch. The dielectric substrate is provided with a first surface and a second surface, which are disposed opposite to each other. The radiating patch is disposed on the first surface and has a plurality of first slits. The grounding patch is disposed on the second surface and has a plurality of second slits. The radiating patch and the grounding patch overlap along the direction from the first surface to the second surface, and the vertical distance between the radiating patch and the grounding patch is less than 0.01λ.

[0006] Optionally, the plurality of first gaps divide the radiation patch into a plurality of patch units, the plurality of patch units being arranged in a matrix, and the patch units being square in shape.

[0007] Optionally, the width of the first gap is 0.18 mm.

[0008] Optionally, the plurality of second gaps divide the grounding plate into a first grounding portion and a second grounding portion. The first grounding portion includes a plurality of first grounding units arranged in an array, and the corners of the first grounding units are chamfered. The corners of any four adjacent first grounding units form a circle. The second grounding portion is sheet-shaped.

[0009] Optionally, the width of the second gap is 0.27 mm, and / or the diameter of the circle formed by the corners of any four adjacent first grounding units is 0.4 mm.

[0010] Optionally, the microstrip antenna further includes a feed line; the feed line is attached to the first surface, and one end of the feed line is connected to the radiating patch.

[0011] Optionally, the length of the feed line on the first surface is the same as the minimum width of the second grounding portion, and the minimum width of the second grounding portion is 3.4 mm.

[0012] Optionally, the length and width of the radiating patch are both 5.4 mm, and the length and width of the grounding patch are both 5.4 mm or 6.4 mm.

[0013] To solve the above-mentioned technical problems, another technical solution adopted in the embodiments of the present invention is to provide a radar, including the microstrip antenna described in any of the above-mentioned claims.

[0014] To solve the above-mentioned technical problems, another technical solution adopted in the embodiments of the present invention is to provide a communication device, including the microstrip antenna described in any of the above-mentioned claims.

[0015] This invention provides a microstrip antenna, including a dielectric substrate, a radiating patch, and a grounding patch. The dielectric substrate has a first surface and a second surface, which are disposed opposite to each other. The radiating patch is disposed on the first surface and has a plurality of first slits. The grounding patch is disposed on the second surface and has a plurality of second slits. The radiating patch and the grounding patch overlap along the direction from the first surface to the second surface, and the vertical distance between the radiating patch and the grounding patch is less than 0.01λ. By configuring the radiating patch and the grounding patch, the radiating patch having first slits, the grounding patch having second slits, the radiating patch and the grounding patch overlapping, and the vertical distance between the radiating patch and the grounding patch being less than 0.01λ, end-fire of the microstrip antenna can be achieved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in specific embodiments of the present invention or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the microstrip antenna structure according to an embodiment of the present invention;

[0018] Figure 2This is a schematic diagram of the microstrip antenna junction from another angle according to an embodiment of the present invention;

[0019] Figure 3 This is another angled structural schematic diagram of the microstrip antenna according to an embodiment of the present invention;

[0020] Figure 4 This is an experimental schematic diagram of the microstrip antenna according to an embodiment of the present invention;

[0021] Figure 5 This is an experimental schematic diagram of the microstrip antenna according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the end-fire direction of the microstrip antenna according to an embodiment of the present invention;

[0023] Figure 7 This is another schematic diagram of the end-fire direction of the microstrip antenna in an embodiment of the present invention;

[0024] Figure 8 This is another schematic diagram of the end-fire direction of the microstrip antenna in an embodiment of the present invention. Attached image description:

[0026] 100, Microstrip antenna; 10, Dielectric substrate; 101, First surface; 102, Second surface; 20, Radiation patch; 201, First slot; 30, Grounding patch; 301, Second slot; 302, First grounding portion; 321, First grounding unit; 303, Second grounding portion; 202, Patch unit; 40, Feed line. Detailed Implementation

[0027] 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 "upper," "lower," "inner," "outer," "vertical," "horizontal," etc., used in this specification indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] 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.

[0029] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] See Figures 1 to 3 The microstrip antenna 100 includes: a dielectric substrate 10, a radiating patch 20, a grounding patch 30, and a feed line 40; the dielectric substrate 10 is provided with a first surface 101 and a second surface 102, and the first surface 101 and the second surface 102 are disposed opposite to each other; the radiating patch 20 is disposed on the first surface 101, and the radiating patch 20 has a plurality of first slits 201; the grounding patch 30 is disposed on the second surface 102, and the grounding patch 30 has a plurality of second slits 301; the feed line 40 is attached to the first surface 101, and one end of the feed line 40 is connected to the radiating patch 20; wherein, along the direction from the first surface 101 to the second surface 102, the radiating patch 20 and the grounding patch 30 overlap, and the vertical distance between the radiating patch 20 and the grounding patch 30 is less than 0.01λ. By setting a radiating patch 20 and a grounding plate 30, the radiating patch 20 has a first gap 201, and the grounding plate 30 has a second gap 301. The radiating patch 20 and the grounding plate 30 overlap, and the vertical distance between the radiating patch 20 and the grounding plate 30 is less than 0.01λ. Figure 4 and Figure 5 As shown, as long as the thickness of the dielectric substrate is less than 0.1 mm (0.01λ), the microstrip antenna will produce end-fire performance. Simulation experiments using the FSS (Frequency Selective Surface) method show that the ideal target of 27-30 GHz is achieved, where the transmission coefficient S11 < -10 dB and the projection coefficient > -5 dB.

[0031] In some embodiments, such as Figure 2 The plurality of first gaps 201 divide the radiation patch 20 into a plurality of patch units 202, the plurality of patch units 202 are arranged in a matrix, and the patch unit 202 is square in shape.

[0032] In some preferred embodiments, the width of the first slit 201 is 0.18 mm.

[0033] It should be noted that the length calculation formula for the microstrip antenna 100 satisfies L=C / (2fr√DK), where L is the length of the radiating patch 20, C is the speed of light, and DK is the dielectric constant. For example, if the resonant frequency of the target is 28GHz, then L=5.4mm is used to create one 5.4x5.4mm parallel patch unit 202.

[0034] In some preferred embodiments, the length and width of the radiating patch 20 are both 5.4 mm.

[0035] It should be noted that the radiating patch 20 refers to a resonant unit used to receive or transmit wireless signals in a specific frequency band, and is the core of the entire antenna system. It can typically consist of one or more identical or different oscillators with characteristic shapes or structures. These oscillators can be conductors with specific dimensions and shapes that are fixed to the surface of the dielectric substrate 10 in any form (such as patch type).

[0036] Please continue reading. Figure 3 The plurality of second gaps 301 divide the grounding patch 30 into a first grounding portion 302 and a second grounding portion 303. The first grounding portion 302 includes a plurality of first grounding units 321 arranged in an array, and the corners of the first grounding units 321 are chamfered. The corners of any four adjacent first grounding units 321 form a circle. The second grounding portion 303 is sheet-shaped. Based on the above arrangement of the radiating patch 20, its performance can be obtained as follows: Figure 6 ,7,8 Figure 6 The radiation pattern faces the end-fire direction and can be used in 5G antenna systems or radar synthetic beam systems. Figure 7 and Figure 8 The typical end-fire direction can be observed in the EH plane of the antenna.

[0037] In some preferred embodiments, the grounding piece 30 has a length and width of 5.4 mm or 6.4 mm.

[0038] In some preferred embodiments, the width of the second gap 301 is 0.27 mm, and / or the corners of any four adjacent first grounding units 321 enclose a circle with a diameter of 0.4 mm.

[0039] In some preferred embodiments, the length of the feed line 40 on the first surface 101 is the same as the minimum width of the second grounding portion 303, and the minimum width of the second grounding portion 303 is 3.4 mm.

[0040] This invention provides a microstrip antenna 100, including a dielectric substrate 10, a radiating patch 20, and a grounding patch 30. The dielectric substrate 10 has a first surface 101 and a second surface 102, which are disposed opposite to each other. The radiating patch 20 is disposed on the first surface 101 and has a plurality of first slits 201. The grounding patch 30 is disposed on the second surface 102 and has a plurality of second slits 301, wherein, along the first surface... In the direction from surface 101 to the second surface 102, the radiating patch 20 and the grounding patch 30 overlap, and the vertical distance between the radiating patch 20 and the grounding patch 30 is less than 0.01λ. By setting the radiating patch 20 and the grounding patch 30, the radiating patch 20 is provided with a first gap 201, the grounding patch 30 is provided with a second gap 301, the radiating patch 20 and the grounding patch 30 overlap, and the vertical distance between the radiating patch 20 and the grounding patch 30 is less than 0.01λ, end-fire of the microstrip antenna 100 can be realized.

[0041] This invention also provides a radar; for specific implementation details, please refer to the microstrip antenna 100 described above, which will not be repeated here.

[0042] This invention also provides a communication device; for specific implementation details, please refer to the microstrip antenna 100 described above, which will not be repeated here. The above descriptions are merely embodiments of this invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of this invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this invention.

Claims

1. A microstrip antenna, characterized in that, include: A dielectric substrate is provided with a first surface and a second surface, the first surface and the second surface being disposed opposite to each other; A radiating patch is disposed on the first surface, and the radiating patch has a plurality of first slits; A grounding plate is disposed on the second surface. The grounding plate has a plurality of second slits, which divide the grounding plate into a first grounding part and a second grounding part. The first grounding part includes a plurality of first grounding units, which are arranged in an array. The corners of the first grounding units are chamfered, and the corners of any four adjacent first grounding units form a circle. The second grounding part is plate-shaped. Wherein, along the direction from the first surface to the second surface, the radiating patch and the grounding patch overlap, and the vertical distance between the radiating patch and the grounding patch is less than 0.01λ.

2. The microstrip antenna according to claim 1, characterized in that, The plurality of first slits divide the radiation patch into a plurality of patch units, the plurality of patch units being arranged in a matrix, and the patch units being square in shape.

3. The microstrip antenna according to claim 2, characterized in that, The width of the first gap is 0.18 mm.

4. The microstrip antenna according to claim 1, characterized in that, The width of the second gap is 0.27 mm, and / or, The corners of any four adjacent first grounding units form a circle with a diameter of 0.4 mm.

5. The microstrip antenna according to claim 1, characterized in that, The microstrip antenna also includes a feed line; The feed line is attached to the first surface, and one end of the feed line is connected to the radiating patch.

6. The microstrip antenna according to claim 5, characterized in that, The length of the feed line on the first surface is the same as the minimum width of the second grounding portion, and the minimum width of the second grounding portion is 3.4 mm.

7. The microstrip antenna according to any one of claims 1-6, characterized in that, The length and width of the radiating patch are both 5.4 mm, and the length and width of the grounding plate are both 5.4 mm or 6.4 mm.

8. A radar, characterized in that, Including the microstrip antenna as described in any one of claims 1-7.

9. A communication device, characterized in that, Including the microstrip antenna as described in any one of claims 1-7.

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