Directional radiation microstrip antenna

Abstract

The utility model discloses a directional radiation microstrip antenna, which comprises a ceramic dielectric plate, a PCB (printed circuit board) and a reflection floor, a first wall surface of the PCB is connected with the top wall of the ceramic dielectric plate, a second wall surface of the reflection floor is connected with the bottom wall of the ceramic dielectric plate, two first circular radiation patches are arranged on the first wall surface of the PCB, and two second circular radiation patches are arranged on the second wall surface of the PCB. The second wall surface of the PCB is provided with a second circular radiation patch, and the second circular radiation patch is coupled with the two first circular radiation patches for feeding. The two first circular radiation patches and the second circular radiation patch are coupled for feeding, generated WIFI 2.4 GHz resonance is excited, the ceramic dielectric plate and the PCB structure are combined for use, the size of the antenna is effectively reduced, the beam width is expanded, miniaturization of the microstrip antenna is achieved, meanwhile, the reflection floor is arranged on the bottom wall of the ceramic dielectric plate, and the antenna is more compact. The antenna is used for reflecting energy radiated by the WIFI antenna at 2.4 GHZ, and directional radiation of the antenna is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless communications, in particular to a directional radiation microstrip antenna. Background Art

[0002] Modern mobile communication devices are constantly evolving towards being compact, low-power, and multifunctional. Consequently, specific requirements for antenna structure and performance are being placed on them, including miniaturization, high gain, wide bandwidth, and multi-band operation. Microstrip antennas, a member of the antenna family, are widely used in mobile communication systems due to their compact structure, small size, light weight, and ease of multi-band operation.

[0003] Antenna bandwidth and gain are closely related to its structure and size. Reducing antenna size reduces efficiency and narrows the bandwidth. However, with the development of modern communication technology, various communication terminals are placing increasingly stringent requirements on antenna size, making antenna size reduction essential. However, existing microstrip antennas, while miniaturized, cannot guarantee the correct radiation direction, making them difficult to meet the requirements of communication systems. Utility Model Content

[0004] The purpose of the utility model is to provide a directional radiation microstrip antenna to solve the technical problem in the prior art that the microstrip antenna cannot guarantee the radiation direction of the antenna while achieving miniaturization and is difficult to meet the requirements of the communication system.

[0005] The utility model provides a directional radiation microstrip antenna, comprising a ceramic dielectric board, a PCB board, and a reflective floor. The first wall surface of the PCB board is connected to the top wall of the ceramic dielectric board, and the second wall surface of the reflective floor is connected to the bottom wall of the ceramic dielectric board. Two first circular radiation patches are provided on the first wall surface of the PCB board, and a second circular radiation patch is provided on the second wall surface of the PCB board. The second circular radiation patch is coupled with the two first circular radiation patches for feeding.

[0006] In the directional radiating microstrip antenna described above, a power divider and a feeding network are provided on the second wall surface of the reflecting floor. The power divider divides the feeding network into a first feeding branch and a second feeding branch. A first probe is provided on the first feeding branch, and a second probe is provided on the second feeding branch. The first probe and the second probe pass through the ceramic dielectric plate and are respectively coupled to the two first circular radiating patches for feeding.

[0007] In the directional radiation microstrip antenna as described above, the ceramic dielectric plate is provided with a first through hole for the first probe to pass through and a second through hole for the second probe to pass through.

[0008] In the directional radiation microstrip antenna as described above, the PCB board is a square board with a side length of 30 mm, and the diameter of the second circular radiation patch is 25.3 mm.

[0009] In the directional radiation microstrip antenna as described above, the diameter of the first circular radiation patch is 6 mm.

[0010] In the directional radiation microstrip antenna as described above, the power splitter is a one-to-two power splitter.

[0011] In the directional radiation microstrip antenna as described above, a copper cladding layer is provided on the first wall surface of the reflective floor.

[0012] In the directional radiation microstrip antenna as described above, the ceramic dielectric plate is a square plate with a side length of 30 mm, and the thickness of the ceramic dielectric plate is 3 mm.

[0013] In the directional radiation microstrip antenna as described above, the reflecting floor is a square plate with a side length of 40 mm.

[0014] In the directional radiation microstrip antenna as described above, the dielectric constant of the ceramic dielectric plate is 8.34.

[0015] The implementation of the present invention will have the following beneficial effects:

[0016] In the present invention, a directional radiating microstrip antenna includes a ceramic dielectric plate, a PCB, and a reflective floor. The first wall of the PCB is connected to the top wall of the ceramic dielectric plate, and the second wall of the reflective floor is connected to the bottom wall of the ceramic dielectric plate. Two first circular radiating patches are provided on the first wall of the PCB, and a second circular radiating patch is provided on the second wall of the PCB. The second circular radiating patch is coupled and fed with the two first circular radiating patches. The two first circular radiating patches are coupled and fed with the second circular radiating patches to stimulate the resonance of the 2.4 GHz Wi-Fi signal. The combination of the ceramic dielectric plate and the PCB effectively reduces the size of the antenna, expands the beam width, and achieves miniaturization of the microstrip antenna. A reflective floor is provided on the bottom wall of the ceramic dielectric plate to reflect the 2.4 GHz Wi-Fi radiation energy generated by the coupled feeding of the two first circular radiating patches and the second circular radiating patch, thereby achieving directional radiation of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 is a schematic structural diagram of a directional radiation microstrip antenna according to an exemplary embodiment;

[0019] Figure 2 is a top view of a PCB board according to an exemplary embodiment;

[0020] Figure 3 is a bottom view of a PCB board according to an exemplary embodiment;

[0021] Figure 4 is a top view of a ceramic dielectric plate according to an exemplary embodiment;

[0022] Figure 5 is a schematic structural diagram of a reflective floor according to an exemplary embodiment;

[0023] Figure 6 is a return loss curve diagram of a directional radiating microstrip antenna according to an exemplary embodiment;

[0024] Figure 7 is an efficiency curve diagram of a directional radiation microstrip antenna according to an exemplary embodiment;

[0025] Figure 8 is a gain curve diagram of a directional radiation microstrip antenna according to an exemplary embodiment;

[0026] Figure 9 1 is a radiation pattern of a directional radiating microstrip antenna at 2.4 GHz according to an exemplary embodiment;

[0027] Figure 10 FIG. 3 is a three-dimensional radiation pattern of a directional radiation microstrip antenna at 2.4 GHz according to an exemplary embodiment.

[0028] Among them: 1. PCB board; 11. second circular radiation patch; 12. first circular radiation patch; 2. ceramic dielectric board; 21. first through hole; 22. second through hole; 3. reflection floor; 31. power divider; 32. first feeding branch; 33. second feeding branch; 34. copper clad layer; 4. first probe; 5. second probe. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations 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, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0032] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0034] See also Figure 1-Figure 5The present invention provides a directional radiating microstrip antenna, comprising a ceramic dielectric board 2, a PCB board 1, and a reflective floor 3. A first wall surface of the PCB board 1 is connected to the top wall of the ceramic dielectric board 2, and a second wall surface of the reflective floor 3 is connected to the bottom wall of the ceramic dielectric board 2. Two first circular radiating patches 12 are provided on the first wall surface of the PCB board 1, and a second circular radiating patch 11 is provided on the second wall surface of the PCB board 1. The second circular radiating patch 11 is coupled and fed with the two first circular radiating patches 12. The two first circular radiating patches 12 and the second circular radiating patches 11 are coupled and fed to stimulate the resonance of the 2.4 GHz Wi-Fi signal. The combination of the ceramic dielectric board 2 and the PCB board 1 effectively reduces the antenna's size, expands the beamwidth, and achieves miniaturization of the microstrip antenna. The reflective floor 3 is provided on the bottom wall of the ceramic dielectric board 2 to reflect the Wi-Fi 2.4 GHz radiation energy generated by the coupled feeding of the two first circular radiating patches and the second circular radiating patch, thereby achieving directional radiation of the antenna.

[0035] Specifically, the PCB and the reflective floor 3 are both double-sided dielectric boards, which are made of a substrate material with a flame retardant grade of FR-4.

[0036] Furthermore, a power divider 31 and a feed network are provided on the second wall of the reflective floor 3. The power divider 31 divides the feed network into a first feed branch 32 and a second feed branch 33. A first probe 4 is provided on the first feed branch 32, and a second probe 5 is provided on the second feed branch 33. The first probe 4 and the second probe 5 pass through the ceramic dielectric plate 2 and couple with the two first circular radiating patches 12 for power feeding. Using the power divider 31 and the antenna to share the reflective floor 3 effectively reduces the thickness of the antenna, making the structure more compact, facilitating product miniaturization, and facilitating processing and production. Specifically, the power divider 31 is a one-to-two power divider, which divides the feeding network into a first feeding branch 32 and a second feeding branch 33. The first feeding branch 32 and a first circular radiation patch 12 are connected through the first probe 4, and the second feeding branch 33 and another first circular radiation patch 12 are connected through the second probe 5, thereby stimulating the 2.4GHz-2.5GHz frequency band resonance of WIFI.

[0037] Specifically, the first probe 4 and the second probe 5 are both feeding pins, the resistance of the feeding network is 100 ohm, the inductance is 120 NH, and the resistance on the first probe 4 and the second probe 5 is 50 ohm, so a 50 ohm coaxial line is used for feeding.

[0038] Furthermore, the ceramic dielectric plate 2 is provided with a first through hole 21 for the first probe 4 to pass through and a second through hole 22 for the second probe 5 to pass through. The first through hole 21 and the second through hole 22 are both circular holes with a radius of 0.6 mm.

[0039] Furthermore, the PCB board 1 is a square board with a side length of 30 mm, and the diameter of the second circular radiation patch 11 is 25.3 mm.

[0040] Furthermore, the diameter of the first circular radiation patch 12 is 6 mm.

[0041] Furthermore, a copper layer 34 is provided on the first wall surface of the reflective floor 3. It should be noted that the feed network is provided on the front surface of the reflective floor 3, while the copper layer 34 is formed by copper cladding on the back surface of the reflective floor 3. This layer is used to reflect the resonance of the Wi-Fi 2.4 GHz signal, acting as a reflector and directionalizing the antenna radiation upward.

[0042] Furthermore, the ceramic dielectric plate 2 is a square plate with a side length of 30 mm, and the thickness of the ceramic dielectric plate 2 is 3 mm.

[0043] Furthermore, the reflective floor 3 is a square plate with a side length of 40 mm.

[0044] Furthermore, the dielectric constant εr of the ceramic dielectric plate 2 is 8.34, the loss Loss is 0.00030, and τf is -43.6 (ppm / °C).

[0045] Reference Attachment Figure 6 As shown in the figure, it is a return loss diagram of the directional radiation microstrip antenna of the utility model. From the results in the figure, it can be seen that the return loss of the directional radiation microstrip antenna of the present application in the 2.4GHz-2.5GHz frequency band is less than -10db, indicating that the signal transmission quality of the antenna is good and can meet the requirements of the communication system.

[0046] Reference Attachment Figure 7 The figure shows the efficiency curve of the directional radiation microstrip antenna of the utility model. As can be seen from the results in the figure, the efficiency of the antenna in the 2.4GHz-2.5GHz frequency band is greater than 75%, which can meet the needs of consumer electronics in the industry.

[0047] Reference Attachment Figure 8 The figure shows the gain curve of the directional radiation microstrip antenna of the present invention. As can be seen from the results in the figure, the maximum gain of the antenna in the 2.4GHz-2.5GHz frequency band is 5.2dBi.

[0048] Reference Attachment Figure 9 and Figure 10The figure shows the radiation pattern of the directional radiating microstrip antenna of the utility model at 2.4GHz. As can be seen from the results in the figure, the radiation direction of the antenna is directional and upward, indicating that the antenna of this solution has good directional radiation characteristics.

[0049] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model.

Claims

1. A directional radiation microstrip antenna, characterized in that: The invention comprises a ceramic dielectric plate (2), a PCB (1) and a reflective floor (3), wherein a first wall surface of the PCB (1) is connected to a top wall of the ceramic dielectric plate (2), a second wall surface of the reflective floor (3) is connected to a bottom wall of the ceramic dielectric plate (2), two first circular radiation patches (12) are provided on the first wall surface of the PCB (1), a second circular radiation patch (11) is provided on the second wall surface of the PCB (1), and the second circular radiation patch (11) is coupled with the two first circular radiation patches (12) for power feeding.

2. The directional radiation microstrip antenna according to claim 1, characterized in that: A power divider (31) and a feeding network are provided on the second wall surface of the reflecting floor (3); the power divider (31) divides the feeding network into a first feeding branch (32) and a second feeding branch (33); a first probe (4) is provided on the first feeding branch (32); a second probe (5) is provided on the second feeding branch (33); the first probe (4) and the second probe (5) pass through the ceramic dielectric plate (2) and are respectively coupled with the two first circular radiation patches (12) for feeding.

3. The directional radiation microstrip antenna according to claim 2, characterized in that: The ceramic dielectric plate (2) is provided with a first through hole (21) for the first probe (4) to pass through, and a second through hole (22) for the second probe (5) to pass through.

4. The directional radiation microstrip antenna according to claim 3, characterized in that: The PCB board (1) is a square board with a side length of 30 mm, and the diameter of the second circular radiation patch (11) is 25.3 mm.

5. The directional radiation microstrip antenna according to claim 4, characterized in that: The diameter of the first circular radiation patch (12) is 6 mm.

6. The directional radiation microstrip antenna according to claim 2, characterized in that: The power divider (31) is a one-to-two power divider.

7. The directional radiation microstrip antenna according to claim 2, characterized in that: A copper-clad layer (34) is provided on the first wall surface of the reflective floor (3).

8. The directional radiation microstrip antenna according to claim 5, characterized in that: The ceramic dielectric plate (2) is a square plate with a side length of 30 mm, and the thickness of the ceramic dielectric plate (2) is 3 mm.

9. The directional radiation microstrip antenna according to claim 8, characterized in that: The reflective floor (3) is a square plate with a side length of 40 mm.

10. The directional radiation microstrip antenna according to claim 1, characterized in that: The dielectric constant of the ceramic dielectric plate (2) is 8.34.

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