antenna

Abstract

The present invention discloses an antenna comprising a cylindrical outer shell and a longitudinally elongated circuit board housed within the outer shell. The circuit board is provided with a first conductive sheet, a second conductive sheet, and a third conductive sheet spaced apart from each other. The first conductive sheet comprises a main body, a first vertical portion extending vertically downward from one end of the main body, and a first bent portion extending laterally. The main body controls the 5 GHz current path, while the first bent portion controls the 2.4 GHz current path. This enables the antenna to achieve dual-band performance while also achieving high gain.

Description

Technical field

[0001] The present invention relates to an antenna, and in particular to a high-gain dual-band antenna. [Background Technology]

[0002] With the rapid development of mobile communications, Wi-Fi terminals have become an indispensable part of people's daily lives. Dual-band Wi-Fi antennas, as essential components of Wi-Fi terminals, are widely used in various router devices. Dual-band Wi-Fi antennas can be categorized as either internal or external, depending on their installation method. Due to factors such as size, cost, installation method, and location, internal antennas offer limited performance compared to external antennas. External antennas are generally larger, and with the trend towards miniaturization, their performance is limited. At the same time, high gain performance is essential for dual-band Wi-Fi antennas.

[0003] Therefore, it is necessary to provide an improved antenna to overcome the defects of the prior art. [Summary of the invention]

[0004] The object of the present invention is to provide a high-gain dual-band antenna.

[0005] The objectives of the present invention are achieved through the following technical solutions: an antenna comprising a cylindrical outer shell and a longitudinal circuit board housed in the outer shell, the circuit board being provided with a first conductive sheet, a second conductive sheet and a third conductive sheet arranged at intervals, the first conductive sheet comprising a main body, a first vertical portion extending vertically downward from one end of the main body, and a first bent portion extending laterally, the main body controlling a 5GHz current path, and the first bent portion controlling a 2.4GHz current path.

[0006] Furthermore, the main body includes a first connecting portion, a first U-shaped portion extending from one end of the first connecting portion, and a first end portion extending vertically from one end of the first U-shaped portion. The current flowing through the first vertical portion and the first connecting portion is 5 GHz, which is 1 / 4 wavelength.

[0007] Furthermore, the first U-shaped portion converts a 5 GHz current of 1 / 4 wavelength into a 1 / 2 wavelength.

[0008] Furthermore, the first end is used for a current with a half wavelength of 5 GHz to flow through.

[0009] Furthermore, the first U-shaped portion includes a plurality of connected U-shaped structures, and the 5 GHz current flows in a curved manner in the first U-shaped portion.

[0010] Furthermore, the first end portion includes a middle end portion connected to the first U-shaped portion and a tip portion extending from the other end of the middle end portion, and a dimension of the middle end portion in the transverse direction is larger than that of the tip portion.

[0011] Furthermore, the free end of the first vertical portion is a signal feeding point.

[0012] Furthermore, the second conductive sheet includes a second bending portion, two second U-shaped portions spaced apart, and a grounding portion connecting the second bending portion and the two second U-shaped portions. The second U-shaped portion controls a 5 GHz current path, and the second bending portion controls a 2.4 GHz current path.

[0013] Furthermore, the two second U-shaped portions are arranged along the first vertical portion in a mirror-symmetrical manner, and the two second U-shaped portions and the ground portion form a receiving space, and the first vertical portion is received in the receiving space.

[0014] Furthermore, the third conductive sheet is U-shaped, and the second bent portion is located on one side of the third conductive sheet.

[0015] Compared with existing technologies, the present invention has the following advantages: The present invention provides a main portion, a first vertical portion, and a first bent portion on the first conductive sheet. The main portion controls the 5 GHz current path, while the first bent portion controls the 2.4 GHz current path. This enables the antenna to achieve dual-band performance while also achieving high gain.

Brief Description of the Drawings

[0016] Figure 1 It is a three-dimensional schematic diagram of the antenna of the present invention.

[0017] Figure 2 It is a three-dimensional exploded view of the antenna of the present invention.

[0018] Figure 3 yes Figure 2 Schematic diagram from another angle.

[0019] Figure 4 yes Figure 1 Top view after removing the outer shell.

[0020] Figure 5 Schematic diagram of VSWR simulation results of the antenna of the present invention.

[0021]

Main component symbol description

[0022] Antenna 100 Housing 10

[0023] Upper shell 101 Lower shell 102

[0024] Accommodating cavity 103 Circuit board 20

[0025] First conductive sheet 1 main body 11

[0026] First connecting portion 111 First U-shaped portion 112

[0027] First end portion 113 Middle end portion 1131

[0028] Tip portion 1132 First vertical portion 12

[0029] Free end 121 First bend portion 13

[0030] Second conductive sheet 2 Second bent portion 21

[0031] Second U-shaped portion 22 Grounding portion 23

[0032] Accommodating space 24 Third conductive sheet 3

[0033] Coaxial connector 30

[0034] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. [Specific implementation method]

[0035] like Figure 1-4 As shown, an antenna 100 of the present invention includes a cylindrical outer shell 10, a longitudinal circuit board 20 accommodated in the outer shell 10, a coaxial connector 30 installed at one end of the outer shell 10, and a coaxial cable (not shown) connecting the circuit board 20 and the coaxial connector 30.

[0036] like Figure 1-3 As shown, the outer shell 10 includes an upper shell 101 and a lower shell 102 that matches the upper shell 101. The upper shell 101 and the lower shell 102 match to form a receiving cavity 103 for receiving the circuit board 20.

[0037] like Figure 4As shown, the circuit board 20 is provided with a first conductive sheet 1, a second conductive sheet 2, and a third conductive sheet 3 spaced apart in sequence. The first conductive sheet 1 includes a main body 11, a first vertical portion 12 extending vertically downward from one end of the main body 11, and a first bent portion 13 extending laterally. The free end 121 of the first vertical portion 12 is a signal feed point. The first bent portion 13 is L-shaped, with an angle of 90° between its two sides. The main body 11 controls the 5GHz current path, and the first bent portion 13 controls the 2.4GHz current path. The main body 11 includes a first connecting portion 111, a first U-shaped portion 112 extending from one end of the first connecting portion 111, and a first end portion 113 extending vertically from one end of the first U-shaped portion 112. The first end portion 113 includes a middle portion 1131 connected to the first U-shaped portion 112 and a tip portion 1132 extending from the other end of the middle portion 1131. The middle portion 1131 is larger than the tip portion 1132 in the lateral direction. The first U-shaped portion 112 includes a plurality of connected U-shaped structures, and a 5 GHz current bends and flows in the first U-shaped portion 112. In the present invention, the current flowing through the first vertical portion 12 and the first connecting portion 111 is 5 GHz with a quarter wavelength. The first U-shaped portion 112 converts the 5 GHz current with a quarter wavelength into a half wavelength. The first end portion is used to pass a 5 GHz current with a half wavelength.

[0038] The second conductive sheet 2 includes a second bent portion 21, two spaced-apart second U-shaped portions 22, and a grounding portion 23 connecting the second bent portion 21 and the two second U-shaped portions 22. The second U-shaped portion 22 is L-shaped, with a 90° angle between its two sides. The two second U-shaped portions 22 are arranged in mirror symmetry along the first vertical portion 12. The two second U-shaped portions 22 and the grounding portion 23 form a receiving space 24, which accommodates the first vertical portion 12. The second U-shaped portion 22 controls the 5 GHz current path, while the second bent portion 21 controls the 2.4 GHz current path.

[0039] The third conductive sheet 3 is U-shaped, and the second bent portion 21 is located on one side of the third conductive sheet 3. The third conductive sheet 3 is located near one end of the coaxial connector 30.

[0040] In the present invention, the antenna 100 has both 2.4GHz and 5GHz operating frequency bands, wherein the gain of the 2.4-2.5GHz operating frequency band is greater than 2.84dBi, and the gain of the 5.15-5.85GHz operating frequency band is greater than 3.83dBi (see Table 1). It can be seen that the gain of the present invention in the high frequency band is improved, which makes the antenna signal transmission distance longer, thereby improving the signal transmission performance of the antenna. Figure 5As shown, the horizontal axis represents the frequency and the vertical axis represents the standing wave of the antenna. Figure 5 The middle curve represents the standing wave simulation curve of the present invention. From the curve of the change of the antenna standing wave with frequency, it can be seen that the present invention fully covers 2.4-2.5GHz and 5.15-5.85GHz, and VSWR<2 within the working frequency band.

[0041] Table 1, Gain table of 2.4GHz and 5GHz operating frequency bands

[0042]

[0043] In summary, the antenna described herein has the following beneficial effects: The first conductive sheet 1 includes a main portion 11, a first vertical portion 12, and a first bent portion 13; the second conductive sheet 2 includes a second bent portion 21 and two spaced-apart second U-shaped portions 22; the main portion 11 and the two second U-shaped portions 22 control the 5 GHz current path, while the first bent portion 13 and the second bent portion 21 control the 2.4 GHz current path. This enables the antenna to achieve dual-band performance while also achieving high gain.

[0044] The above descriptions are only some embodiments of the present invention, not all embodiments. Any equivalent changes made to the technical solution of the present invention by ordinary technicians in this field after reading the specification of the present invention are covered by the claims of the present invention.

Claims

1. An antenna comprising a cylindrical outer shell and a longitudinally elongated circuit board housed in the outer shell, wherein the circuit board is provided with a first conductive sheet, a second conductive sheet, and a third conductive sheet spaced apart from each other, characterized in that: The first conductive sheet includes a main body, a first vertical portion extending vertically downward from one end of the main body, and a first bent portion extending laterally. The main body controls the 5GHz current path, and the first bent portion controls the 2.4GHz current path. The second conductive sheet includes two second U-shaped portions spaced apart, and the first vertical portion extends into the spacing area between the two second U-shaped portions.

2. The antenna according to claim 1, wherein: The main body includes a first connecting portion, a first U-shaped portion extending from one end of the first connecting portion, and a first end portion extending vertically from one end of the first U-shaped portion. The current flowing through the first vertical portion and the first connecting portion is 5 GHz, which is 1 / 4 wavelength.

3. The antenna according to claim 2, wherein: The first U-shaped portion converts a 5 GHz current of 1 / 4 wavelength into a 1 / 2 wavelength.

4. The antenna according to claim 3, wherein: The first end is used for allowing a 5 GHz current with a half wavelength to flow through.

5. The antenna according to claim 2, wherein: The first U-shaped portion includes a plurality of connected U-shaped structures, and the 5 GHz current flows in a curved manner in the first U-shaped portion.

6. The antenna according to claim 2, wherein: The first end portion includes a middle end portion connected to the first U-shaped portion and a tip portion extending from the other end of the middle end portion, and a dimension of the middle end portion in a transverse direction is larger than that of the tip portion.

7. The antenna according to claim 1, wherein: The free end of the first vertical portion is a signal feeding point.

8. The antenna according to claim 1, wherein: The second conductive sheet includes a second bending portion and a grounding portion connecting the second bending portion and the two second U-shaped portions. The second U-shaped portion controls a 5 GHz current path, and the second bending portion controls a 2.4 GHz current path.

9. The antenna according to claim 8, wherein: The two second U-shaped portions are arranged along the first vertical portion in a mirror-symmetrical manner, and the two second U-shaped portions and the ground portion form a receiving space.

10. The antenna according to claim 8, wherein: The third conductive sheet is U-shaped, and the second bent portion is located on one side of the third conductive sheet.

Images