WIFI (Wireless Fidelity) double-frequency double-radiation-form antenna system

Abstract

The utility model discloses a WIFI dual-frequency dual-radiation form antenna system, which comprises a radiation patch, a first antenna patch, a second antenna patch, an impedance conversion line and a dielectric plate, the radiation patch, the impedance conversion line and the first antenna patch are all arranged on the front surface of the dielectric plate, the second antenna patch is arranged on the back surface of the dielectric plate, and the impedance conversion line is arranged on the back surface of the dielectric plate. Two ends of the impedance conversion line are respectively connected with the radiation patch and the first antenna patch, and a dipole structure is formed between the first antenna patch and the second antenna patch. According to the antenna system, the second antenna patch serves as a reflecting plate of the 5.8 GHz antenna to play a role in directional radiation and achieve the directional effect of the antenna, and the second antenna patch also serves as a quarter-wavelength radiator of the 2.4 GHz dipole antenna to play a role in omnidirectional radiation and achieve the omnidirectional radiation effect of the 2.4 GHz dipole antenna. Different radiation directions are generated in different WIFI frequencies, so that the antenna has two radiation directions.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless communication, in particular to a WIFI dual-frequency dual-radiation antenna system. Background Art

[0002] In recent years, with the rapid development of wireless communication technology, there are more and more communication devices with two operating frequency bands. For example, mobile communications, satellite communications and vehicular communications have different operating frequency bands. At this time, traditional single-frequency antennas can no longer meet the requirements of today's communication systems. The method of using two single-frequency antennas to work together can cover two different frequency bands at the same time, but this method will cause waste of materials and space, leading to increased cost and complexity. Stacked patch antennas are an antenna form that can operate in two different frequency bands. Compared with traditional single-frequency antennas, stacked patch antennas have the advantages of miniaturization and low profile, and are very suitable for multiple system requirements such as satellite communications, mobile communications and vehicular communications. However, the radiation direction of the two frequency bands of existing dual-frequency antennas is the same, and it is impossible to have two radiation directions at the same time. Utility Model Content

[0003] The purpose of the utility model is to provide a WIFI dual-band dual-radiation antenna system to solve the technical problem in the prior art that the antenna cannot have two radiation directions at the same time.

[0004] The present invention provides a Wi-Fi dual-band, dual-radiating antenna system, comprising a radiating patch, a first antenna patch, a second antenna patch, an impedance transformation line, and a dielectric plate. The radiating patch, the impedance transformation line, and the first antenna patch are all disposed on the front surface of the dielectric plate, while the second antenna patch is disposed on the back surface of the dielectric plate. The ends of the impedance transformation line are connected to the radiating patch and the first antenna patch, respectively, forming a dipole structure between the first and second antenna patches. In the above-described Wi-Fi dual-band, dual-radiating antenna system, the first antenna patch is provided with a feed point, and the second antenna patch is provided with a reference point.

[0005] In the WIFI dual-band dual-radiation antenna system described above, a first resonant frequency band is formed on the dipole structure, and a second resonant frequency band is formed on the radiation patch.

[0006] In the aforementioned WIFI dual-band dual-radiation antenna system, the first resonant frequency band is 2.4 GHz-2.5 GHz.

[0007] In the aforementioned WIFI dual-band dual-radiation antenna system, the second resonant frequency band is 5.7 GHz-5.85 GHz.

[0008] In the aforementioned WIFI dual-band dual-radiation antenna system, the second antenna patch is a reflection ground of the first resonant frequency band.

[0009] In the aforementioned WIFI dual-band dual-radiation antenna system, the second antenna patch is a radiator of the second resonant frequency band.

[0010] In the WIFI dual-band dual-radiation antenna system as described above, the projection of the feeding point and the reference location in the horizontal direction overlap.

[0011] In the aforementioned WIFI dual-band dual-radiation antenna system, the radiation patch, the first antenna patch, and the second antenna patch are all square patches.

[0012] In the WiFi dual-band dual-radiation antenna system described above, the projections of the radiation patch and the second antenna patch in the horizontal direction overlap.

[0013] The implementation of the present invention will have the following beneficial effects:

[0014] In the utility model, the WIFI dual-band dual-radiation antenna system includes a radiating patch, a first antenna patch, a second antenna patch, an impedance transformation line and a dielectric plate. The radiating patch, the impedance transformation line and the first antenna patch are all arranged on the front side of the dielectric plate, and the second antenna patch is arranged on the back side of the dielectric plate. The two ends of the impedance transformation line are respectively connected to the radiating patch and the first antenna patch, and a dipole structure is formed between the first antenna patch and the second antenna patch. The second antenna patch and the first antenna patch form a 2.4 GHz dipole antenna and stimulate resonance in the 2.4 GHz-2.5 GHz range. The radiating patch, impedance transformation line, and second antenna patch together form a 5.8 GHz antenna and stimulate resonance in the 5.7 GHz-5.85 GHz range. The second antenna patch acts as a reflector for the 5.8 GHz antenna, providing directional radiation and achieving the antenna's directional effect. The second antenna patch also acts as a quarter-wavelength radiator for the 2.4 GHz dipole antenna, providing omnidirectional radiation. This creates an omnidirectional radiation effect for the 2.4 GHz dipole antenna, generating different radiation directions at different Wi-Fi frequencies, giving the antenna two radiation directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1 1 is a schematic structural diagram of a WIFI dual-band dual-radiation antenna system according to an exemplary embodiment;

[0017] Figure 2 is a top view of a WIFI dual-band dual-radiation antenna system according to an exemplary embodiment;

[0018] Figure 3 is a bottom view of a WIFI dual-band dual-radiation antenna system according to an exemplary embodiment;

[0019] Figure 4 is a return loss curve diagram of a directional radiating microstrip antenna according to an exemplary embodiment;

[0020] Figure 5 is an efficiency curve diagram of a directional radiation microstrip antenna according to an exemplary embodiment;

[0021] Figure 6 1 is a radiation pattern of a directional radiating microstrip antenna at 2.4 GHz according to an exemplary embodiment;

[0022] Figure 7 FIG. 3 is a three-dimensional radiation pattern of a directional radiation microstrip antenna at 5.8 GHz according to an exemplary embodiment.

[0023] Among them: 1. Radiating patch; 2. First antenna patch; 21. Feeding point; 3. Second antenna patch; 31. Reference location; 4. Dielectric board; 5. Impedance transformation line. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] See also Figure 1-Figure 3 The utility model provides a WIFI dual-band dual-radiation antenna system, including a radiating patch 1, a first antenna patch 2, a second antenna patch 3, an impedance transformation line 5 and a dielectric plate 4. The radiating patch 1, the impedance transformation line 5 and the first antenna patch 2 are all arranged on the front side of the dielectric plate 4, and the second antenna patch 3 is arranged on the back side of the dielectric plate 4. The two ends of the impedance transformation line 5 are respectively connected to the radiating patch 1 and the first antenna patch 2, and a dipole structure is formed between the first antenna patch 2 and the second antenna patch 3. The second antenna patch 3 and the first antenna patch 2 form a 2.4 GHz dipole antenna and stimulate 2.4 GHz-2.5 GHz resonance. The radiation patch 1, the impedance transformation line 5, and the second antenna patch 3 together form a 5.8 GHz antenna and stimulate 5.7 GHz-5.85 GHz resonance. The second antenna patch 3 acts as a reflector for the 5.8 GHz antenna, playing a role of directional radiation, thereby achieving a directional effect of the antenna. The second antenna patch 3 also acts as a quarter-wavelength radiator of the 2.4 GHz dipole antenna, playing an omnidirectional radiation role, forming an omnidirectional radiation effect of the 2.4 GHz dipole antenna, so as to generate different radiation directions at different Wi-Fi frequencies, so that the antenna has two radiation directions.

[0030] Furthermore, a feeding point 21 is provided on the first antenna patch 2, and a reference point 31 is provided on the second antenna patch 3. An edge-feeding feeding method is adopted, and a two-hole flange SMA connector is used to realize feeding.

[0031] Furthermore, a first resonant frequency band is formed on the dipole structure, and a second resonant frequency band is formed on the radiation patch 1 .

[0032] Furthermore, the first resonant frequency band is 2.4 GHz-2.5 GHz.

[0033] Furthermore, the second resonant frequency band is 5.7 GHz-5.85 GHz.

[0034] Furthermore, the second antenna patch 3 is a reflection ground for the first resonant frequency band. The second antenna patch 3 is a reflection ground for the 5.8 GHz antenna, and is used to reflect the band emitted by the 5.8 GHz antenna to form a directional effect.

[0035] Furthermore, the second antenna patch 3 is a radiator of the second resonant frequency band. The second antenna patch 3 is a 2.4 GHz dipole antenna radiator, which is used to radiate the band emitted by the 2.4 GHz dipole antenna to form an omnidirectional effect.

[0036] Furthermore, the projections of the feeding point 21 and the reference location 31 in the horizontal direction overlap.

[0037] Furthermore, the radiation patch 1 , the first antenna patch 2 , and the second antenna patch 3 are all square patches.

[0038] Furthermore, the projections of the radiation patch 1 and the second antenna patch 3 in the horizontal direction overlap, which is conducive to exciting the generation of 5.8 GHz resonance and at the same time reflects the radiation direction of the 5.8 GHz antenna, thereby achieving a directional upward effect.

[0039] Reference Attachment Figure 4 As shown in the figure, it is a return loss diagram of the WIFI dual-band dual-radiation antenna system 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 is less than -10dB in the 2.4GHz-2.5GHz frequency band and the 5.7GHz-5.85GHz frequency band, indicating that the signal transmission quality of the antenna is good and can meet the requirements of the communication system.

[0040] Reference Attachment Figure 5 Figure 2 shows the efficiency curve of the Wi-Fi dual-band, dual-radiation antenna system of this utility model. The results in the figure show that the antenna has an efficiency of approximately 90% in the 2.4GHz-2.5GHz and 5.7GHz-5.85GHz frequency bands, which can meet the needs of consumer electronics industry applications.

[0041] Reference Attachment Figure 6 The figure shows the radiation pattern of the WIFI dual-band dual-radiation antenna system of this utility model at 2.4GHz. As can be seen from the results in the figure, the radiation direction of this frequency band is omnidirectional, indicating that the antenna of this solution has good omnidirectional radiation characteristics.

[0042] Reference Attachment Figure 7 The figure shows the radiation pattern of the 5.8GHz WIFI dual-band dual-radiation antenna system of this utility model. As can be seen from the results in the figure, the radiation direction in this frequency band is directional and upward, indicating that the antenna of this solution has good directional radiation characteristics.

[0043] The utility model relates to a WIFI dual-band dual-radiation antenna system which has two frequency bands of resonance at the same time, and different frequencies can produce different radiation directions, thus realizing the dual-band dual radiation of the antenna and being able to meet the needs of satellite communication and vehicle-mounted mobile communication at the same time.

[0044] The antenna system in this case has a simple structure and strong tunability, can be applied to a variety of application scenarios, and is conducive to product mass production.

[0045] 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 WIFI dual-band dual-radiation antenna system, characterized in that: The invention comprises a radiation patch (1), a first antenna patch (2), a second antenna patch (3), an impedance transformation line (5) and a dielectric plate (4); the radiation patch (1), the impedance transformation line (5) and the first antenna patch (2) are all arranged on the front side of the dielectric plate (4); the second antenna patch (3) is arranged on the back side of the dielectric plate (4); two ends of the impedance transformation line (5) are respectively connected to the radiation patch (1) and the first antenna patch (2); a dipole structure is formed between the first antenna patch (2) and the second antenna patch (3).

2. The WIFI dual-band dual-radiation antenna system according to claim 1, characterized in that: A feeding point (21) is provided on the first antenna patch (2), and a reference point (31) is provided on the second antenna patch (3).

3. The WIFI dual-band dual-radiation antenna system according to claim 2, characterized in that: A first resonant frequency band is formed on the dipole structure, and a second resonant frequency band is formed on the radiation patch (1).

4. The WIFI dual-band dual-radiation antenna system according to claim 3, characterized in that: The first resonant frequency band is 2.4 GHz-2.5 GHz.

5. The WIFI dual-band dual-radiation antenna system according to claim 3, characterized in that: The second resonant frequency band is 5.7 GHz-5.85 GHz.

6. The WIFI dual-band dual-radiation antenna system according to claim 4, characterized in that: The second antenna patch (3) is a reflection ground of the first resonant frequency band.

7. The WIFI dual-band dual-radiation antenna system according to claim 5, characterized in that: The second antenna patch (3) is a radiator of the second resonant frequency band.

8. The WIFI dual-band dual-radiation antenna system according to claim 2, characterized in that: The projections of the feeding point (21) and the reference location (31) in the horizontal direction overlap.

9. The WIFI dual-band dual-radiation antenna system according to claim 1, characterized in that: The radiation patch (1), the first antenna patch (2) and the second antenna patch (3) are all square patches.

10. The WIFI dual-band dual-radiation antenna system according to claim 9, characterized in that: The projections of the radiation patch (1) and the second antenna patch (3) in the horizontal direction overlap.

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