L-shaped probe feed patch antenna

Abstract

The invention provides an L-shaped probe feed patch antenna which comprises a grounding plane, a first radiation patch, a first dielectric substrate and a second dielectric substrate, the first dielectric substrate and the second dielectric substrate are located between the grounding plane and the first radiation patch, the first dielectric substrate and the second dielectric substrate are orthogonally intersected, the first dielectric substrate and the second dielectric substrate are attached to the first radiation patch, and the second dielectric substrate is attached to the second radiation patch. The first dielectric substrate and the second dielectric substrate are respectively provided with a first L-shaped probe and a second L-shaped probe. According to the L-shaped probe feed patch antenna, the first dielectric substrate and the second dielectric substrate are orthogonally arranged and are arranged between the first radiation patch and the grounding plane, and the first dielectric substrate and the second dielectric substrate are attached, so that the size of the antenna can be effectively reduced; the first L-shaped probe and the second L-shaped probe arranged on the first dielectric substrate and the second dielectric substrate respectively act on-45-degree polarization and + 45-degree polarization, so that the polarization loss of the antenna is effectively reduced, and the antenna is ensured to have a good radiation range while the size is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communication, and particularly to an L-shaped probe-fed patch antenna. Background Art

[0002] With the development of 5G technology, new challenges have been posed for base station deployment. With the rapid development of the mobile communication industry, multi-band antennas and broadband antennas have emerged, supporting different communication bands, capable of covering a wider range of frequency bands, adapting to different communication requirements, and providing users with faster and more reliable communication services. The base station antennas in the prior art are relatively large in size, occupying space, and having high installation and maintenance costs, which is not conducive to the rapid development and wide application of 5G networks.

[0003] Therefore, there is a need to provide an L-shaped probe-fed patch antenna to solve the above technical problems. Summary of the Invention

[0004] The present invention provides an L-shaped probe-fed patch antenna to solve the problems that the base station antennas in the prior art are relatively large in size, occupying space, and having high installation and maintenance costs, which is not conducive to the rapid development and wide application of 5G networks.

[0005] To solve the above technical problems, the technical solution of the present invention is: an L-shaped probe-fed patch antenna, including a ground plane, a first radiation patch located on one side of the ground plane, and a first dielectric substrate and a second dielectric substrate located between the ground plane and the first radiation patch. The first dielectric substrate and the second dielectric substrate are perpendicularly arranged, the first dielectric substrate and the second dielectric substrate are both attached to the first radiation patch, a first L-shaped probe and a second L-shaped probe are arranged on the first surface of the first dielectric substrate and the first surface of the second dielectric substrate, the first L-shaped probe and the second L-shaped probe are connected, and the openings of the first L-shaped probe and the second L-shaped probe are opposite.

[0006] In the present invention, a second radiation patch is further arranged on one side of the first radiation patch.

[0007] In the present invention, the distance between the second radiation patch and the first radiation patch is 28 mm - 31 mm.

[0008] In the present invention, the relative dielectric constant of the first dielectric substrate and the second dielectric substrate is 2.2 pF, and the thickness of the first dielectric substrate and the thickness of the second dielectric substrate are both 0.5 mm.

[0009] In the present invention, a first vertical hole is provided on one side of the center position of the first dielectric substrate close to the ground plane, and a second vertical hole matching the first vertical hole is provided on one side of the center position of the second dielectric substrate close to the first radiation patch. The second vertical hole passes through the first vertical hole and is clamped on the first dielectric substrate, and the first dielectric substrate and the second dielectric substrate intersect orthogonally.

[0010] In the present invention, H-shaped ground layers are provided on the second surfaces of both the first dielectric substrate and the second dielectric substrate.

[0011] In the present invention, a first port connected to the ground plane is provided on the first dielectric substrate, and a second port connected to the ground plane is provided on the second dielectric substrate. The isolation between the first port and the second port is less than -30 dB.

[0012] In the present invention, through holes are further provided on one side of the first dielectric substrate and one side of the second dielectric substrate of the ground plane.

[0013] In the present invention, the first radiation patch is square, and the side length of the first radiation patch is 50 mm.

[0014] In the present invention, the ground plane is square, and the side length of the ground plane is 120 mm - 200 mm.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: For the L-shaped probe-fed patch antenna of the present invention, by arranging the first dielectric substrate and the second dielectric substrate to intersect orthogonally and setting them between the first radiation patch and the ground plane, and the first dielectric substrate and the second dielectric substrate are attached to each other, the volume of the antenna can be effectively reduced. The first L-shaped probe and the second L-shaped probe provided on the first dielectric substrate and the second dielectric substrate act as -45° and +45° polarizations respectively, effectively reducing the polarization loss of the antenna, and ensuring that the antenna has a good radiation range while reducing the volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required to be used in the embodiments. The drawings in the following description are only the corresponding drawings of some embodiments of the present invention.

[0017] Figure 1 It is a perspective view of the L-shaped probe-fed patch antenna of the present invention.

[0018] Figure 2 It is a front view of the first dielectric substrate of the L-shaped probe-fed patch antenna of the present invention.

[0019] Figure 3Rear view of the first dielectric substrate of the L-shaped probe-fed patch antenna of the present invention.

[0020] Figure 4 Front view of the second dielectric substrate of the L-shaped probe-fed patch antenna of the present invention.

[0021] Figure 5 Simulation test diagram of the isolation and bandwidth of the L-shaped probe-fed patch antenna of the present invention.

[0022] Figure 6 Simulation test diagram of the isolation between the first dielectric substrate and the second dielectric substrate of the L-shaped probe-fed patch antenna of the present invention.

[0023] Figure 7 Simulation test diagram of the isolation between the first port and the second port of the L-shaped probe-fed patch antenna of the present invention.

[0024] 11. Ground plane; 12. First radiation patch; 13. First dielectric substrate; 14. Second dielectric substrate; 15. Second radiation patch; 131. First L-shaped probe; 132. Second L-shaped probe; 133. First port; 134. First vertical hole; 135. H-shaped ground layer; 141. Second port; 142. Second vertical hole. Detailed implementation manner

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0026] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art belonging to the field of the present disclosure.

[0027] In the description of the present patent application and the claims, the terms "first", "second" and similar terms do not denote any order, quantity or importance, but are only used to distinguish different components. Terms such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. Terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0029] The following is a preferred embodiment of an L-shaped probe-fed patch antenna provided by the present invention that can solve the above technical problems.

[0030] Please refer to Figure 1 、 Figure 2 and Figure 4 where Figure 1 is a perspective view of the L-shaped probe-fed patch antenna of the present invention, Figure 2 is a front view of the first dielectric substrate of the L-shaped probe-fed patch antenna of the present invention, Figure 4 is a front view of the second dielectric substrate of the L-shaped probe-fed patch antenna of the present invention.

[0031] In the figure, units with similar structures are denoted by the same reference numerals.

[0032] In the terms of the present invention, words such as "first" and "second" are only for descriptive purposes and cannot be construed as indicating or implying relative importance, nor as a limitation on the order of precedence.

[0033] An L-shaped probe-fed patch antenna provided by the present invention includes a ground plane 11, a first radiation patch 12 located on one side of the ground plane 11, and a first dielectric substrate 13 and a second dielectric substrate 14 located between the ground plane 11 and the first radiation patch 12. The first dielectric substrate 13 and the second dielectric substrate 14 are arranged orthogonally. Both the first dielectric substrate 13 and the second dielectric substrate 14 are attached to the first radiation patch 12. A first L-shaped probe 131 and a second L-shaped probe 132 are provided on the first surface of the first dielectric substrate 13 and the first surface of the second dielectric substrate 14. The first L-shaped probe 131 and the second L-shaped probe 132 are connected. The openings of the first L-shaped probe 131 and the second L-shaped probe 132 are opposite. The orthogonally arranged first dielectric substrate 13 and second dielectric substrate 14 can effectively reduce the volume of the antenna. At the same time, the first dielectric substrate 13 and the second dielectric substrate 14 are located between the first radiation patch 12 and the ground plane 11, and the first dielectric substrate 13 and the second dielectric substrate 14 are attached to the first radiation patch 12, further reducing the volume of the antenna. The first L-shaped probe 131 and the second L-shaped probe 132 provided on both the first dielectric substrate 13 and the second dielectric substrate 14 are respectively used for -45° and +45° polarization, which can effectively reduce the loss of antenna polarization and ensure that the antenna has a good radiation range while reducing the volume.

[0034] A second radiation patch 15 is further provided on one side of the first radiation patch 12. The second radiation patch 15 is used to increase the bandwidth of the antenna, can effectively prevent the broadband of the antenna from narrowing, and further ensure the radiation range of the antenna.

[0035] Please refer to Figure 7 , the distance between the second radiation patch 15 and the first radiation patch 12 is 28 mm - 31 mm. By setting the distance between the second radiation patch 15 and the first radiation patch 12, the data of the antenna Wd is changed. Figure 7 This is the test result when the distance between the second amplification patch and the first amplification patch is 28 mm - 40 mm. When the distance between the second radiation patch 15 and the first radiation patch 12 is 28 mm, the gain effect of the antenna reaches the highest.

[0036] The relative dielectric constant of the first dielectric substrate 13 and the second dielectric substrate 14 is 2.2 pF. The thickness of the first dielectric substrate 13 and the thickness of the second dielectric substrate 14 are both 0.5 mm. On the one hand, it can effectively reduce the constraint on the electric field energy, enable more energy to be effectively radiated, and thus improve the radiation efficiency of the antenna. On the other hand, it can make the impedance matching of the antenna better, thereby increasing the broadband.

[0037] A first vertical hole 134 is provided on one side of the center position of the first dielectric substrate 13 close to the ground plane 11. A second vertical hole 142 matching the first vertical hole 134 is provided on one side of the center position of the second dielectric substrate 14 close to the first radiation patch 12. The second vertical hole 142 passes through the first vertical hole 134 and is clamped on the first dielectric substrate 13. The first dielectric substrate 13 and the second dielectric substrate 14 intersect orthogonally. The first vertical hole 134 of the first dielectric substrate 13 passes through the second vertical hole 142 of the second dielectric substrate 14, and the first vertical hole 134 of the first dielectric substrate 13 is clamped on the side wall of the second dielectric substrate 14. The second vertical hole 142 of the second dielectric substrate 14 passes through the first vertical hole 134 of the first dielectric substrate 13, so that the second dielectric substrate 14 is clamped on the first dielectric substrate 13. When the second dielectric substrate 14 is clamped on the first dielectric substrate 13, both sides of the first dielectric substrate 13 and the second dielectric substrate 14 are flush, which can effectively reduce the volume of the antenna.

[0038] Please refer to Figure 3 , H-shaped ground layers 135 are provided on the second surfaces of both the first dielectric substrate 13 and the second dielectric substrate 14. On the one hand, the H-shaped ground layer 135 has a good shielding effect. On the other hand, the H-shaped ground layer 135 can form a resonant cavity with the first radiation patch 12, which is helpful for the resonance and radiation of electromagnetic waves. At the same time, it can better adjust the input impedance of the antenna, ensure good matching between the antenna and the first dielectric substrate 13 and the second dielectric substrate 14, and increase the transmission distance and quality of signals.

[0039] Please refer to Figure 6 , a first port 133 connected to the ground plane 11 is provided on the first dielectric substrate 13, and a second port 141 connected to the ground plane 11 is provided on the second dielectric substrate 14. The isolation degree between the first port 133 and the second port 141 is less than -30 dB. When the isolation degree between the first port 133 and the second port 141 is less than -30 dB, the first port 133 and the second port 141 have excellent isolation effects. The simulation test data of the first port 133 and the second port 141 almost coincide, that is, the first port 133 has almost no interference on the second port 141 or the second port 141 has almost no interference on the first port 133, and the satellite positioning signal can be received more accurately and effectively.

[0040] Please refer to Figure 5 , after the isolation degree and broadband simulation test of the antenna, when the standing wave ratio of the antenna is less than 2, the width range of the antenna is 1.74 GHz to 2.77 GHz, the center frequency of the working frequency band is 2.25 GHz, the absolute bandwidth is 1.03 GHz, and the relative bandwidth is 45.8%.

[0041] The ground plane 11 is also provided with vias located on one side of the first dielectric substrate 13 and one side of the second dielectric substrate 14. The vias in the ground plane 11 are used to prevent the first dielectric substrate 13 and the second dielectric substrate 14 from directly contacting the ground plane 11, which can effectively prevent the H-shaped ground layers 135 on the first dielectric substrate 13 and the second dielectric substrate 14 from intersecting with the ground plane 11, thereby effectively changing the input impedance of the antenna and avoiding impedance matching.

[0042] The first radiation patch 12 is square, with a side length of 50 mm. The ground plane 11 is square, with a side length of 120 mm - 200 mm. On the one hand, the volume of the antenna can be reduced. On the other hand, while reducing the volume of the antenna, the computing amount of the software can also be reduced, and the simulation speed of the antenna can be accelerated.

[0043] In this preferred embodiment, the L-shaped probe-fed patch antenna effectively reduces the volume of the antenna by orthogonally arranging the first dielectric substrate and the second dielectric substrate and setting them between the first radiation patch and the ground plane. The first dielectric substrate and the second dielectric substrate are adhered to each other. The first L-shaped probe and the second L-shaped probe provided on the first dielectric substrate and the second dielectric substrate act as -45° and +45° polarizations respectively, effectively reducing the polarization loss of the antenna and ensuring a good radiation range of the antenna while reducing the volume.

[0044] In summary, although the present invention has been disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those of ordinary skill in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is subject to the scope defined by the claims.

Claims

1. An L-shaped probe-fed patch antenna, characterized in that, It includes a ground plane, a first radiation patch located on one side of the ground plane, and a first dielectric substrate and a second dielectric substrate located between the ground plane and the first radiation patch. The first dielectric substrate and the second dielectric substrate are disposed orthogonally. Both the first dielectric substrate and the second dielectric substrate are adhered to the first radiation patch. A first L-shaped probe and a second L-shaped probe are provided on the first surface of the first dielectric substrate and the first surface of the second dielectric substrate. The first L-shaped probe and the second L-shaped probe are connected, and the openings of the first L-shaped probe and the second L-shaped probe are opposite to each other.

2. The L-shaped probe-fed patch antenna according to claim 1, wherein A second radiation patch is further provided on one side of the first radiation patch.

3. The L-shaped probe-fed patch antenna according to claim 2, characterized in that, The distance between the second radiation patch and the first radiation patch is 28 mm - 31 mm.

4. The L-shaped probe-fed patch antenna according to claim 1, wherein, The relative dielectric constant of the first dielectric substrate and the second dielectric substrate is 2.2 pF, and the thickness of the first dielectric substrate and the thickness of the second dielectric substrate are both 0.5 mm.

5. The L-shaped probe-fed patch antenna according to claim 1, wherein A first vertical hole is provided at a position near the ground plane on the center of the first dielectric substrate, and a second vertical hole matching the first vertical hole is provided at a position near the first radiation patch on the center of the second dielectric substrate. The second vertical hole passes through the first vertical hole and is clamped on the first dielectric substrate, and the first dielectric substrate and the second dielectric substrate are orthogonally intersecting.

6. The L-shaped probe-fed patch antenna according to claim 1, characterized in that H-shaped ground layers are provided on the second surface of the first dielectric substrate and the second surface of the second dielectric substrate.

7. The L-shaped probe-fed patch antenna according to claim 1, characterized in that, A first port connected to the ground plane is provided on the first dielectric substrate, and a second port connected to the ground plane is provided on the second dielectric substrate. The isolation degree between the first port and the second port is less than -30 dB.

8. The L-shaped probe-fed patch antenna according to claim 1, wherein The ground plane is further provided with through holes on one side of the first dielectric substrate and one side of the second dielectric substrate.

9. The L-shaped probe-fed patch antenna according to claim 1, characterized in that The first radiation patch is square, and the side length of the first radiation patch is 50 mm.

10. The L-shaped probe-fed patch antenna according to claim 1, characterized in that, The ground plane is square, and the side length of the ground plane is 120 mm - 200 mm.

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