Antenna, circuit board and wireless screen projector

Abstract

The utility model relates to the technical field of antennas, in particular to an antenna, a circuit board and a wireless screen projector. The antenna comprises a signal radiation main body, a grounding pin, a radio frequency signal pin and a side radiation surface. The grounding pin is connected with one end of the signal radiation main body, and the radio frequency signal pin is connected with the signal radiation main body and located beside the grounding pin at an interval; the grounding pin is used for connecting a GND of a circuit board, and the radio frequency signal pin is used for connecting a radio frequency signal feed-in point of the circuit board; and the side radiation surface is connected with the signal radiation main body, is positioned on one side of the signal radiation main body and is positioned beside the grounding pin or the radio frequency signal pin. The antenna radiation efficiency and gain are improved, signal transmission is obviously improved, the coverage range and the transmission distance of signals are further improved, and therefore the problems that when the network environment is poor, video images may be compressed, the image quality is reduced, and even image jamming occurs are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless screen mirroring devices, in particular to an antenna, a circuit board and a wireless screen mirroring device. Background Art

[0002] A wireless screen mirroring device is a device that uses wireless technology to transmit the screen content of intelligent devices such as mobile phones and laptop computers to a display screen in real time. Because of its advantages of high efficiency and convenience, the wireless screen mirroring device has a very outstanding performance in many application fields. For example, in home entertainment, the wireless screen mirroring device can project the content such as games, movie videos, and music MV on mobile phones, tablets or computers onto a TV or a projector, allowing users to enjoy the audio-visual feast brought by the large screen; in business meetings, the wireless screen mirroring device can project PPTs, documents, video texts, etc. onto a large screen, facilitating participants to watch together.

[0003] With the development of audio-visual technology and the optimization of image processing, the video content is also getting larger and larger, from 1080p (1920*1080 pixels) to 2k (2048*1080 pixels or 2560*1400 pixels), and then to 4k (3840*2160). The higher pixel density provides more delicate picture details, but at the same time, it also brings a problem that the content that the screen mirroring device needs to transmit is also getting larger and larger.

[0004] The wireless screen mirroring device transmits data through a WiFi network, which places higher and higher requirements on the network environment. When the network environment is poor, such as when there is large interference or the signal is not good, during the wireless screen mirroring process, the video picture may be compressed, the picture quality may be reduced, or even the picture may freeze. Summary of the Utility Model

[0005] Embodiments of the utility model provide an antenna, a circuit board and a wireless screen mirroring device to solve the problems in the prior art that when the network environment is poor, the video picture may be compressed, the picture quality may be reduced, or even the picture may freeze.

[0006] The utility model discloses an antenna, which includes a signal radiation main body, a grounding pin, a radio frequency signal pin and a side radiation surface; the grounding pin is connected to one end of the signal radiation main body, the radio frequency signal pin is connected to the signal radiation main body and is spaced beside the grounding pin; the grounding pin is used to connect the GND of the circuit board, and the radio frequency signal pin is used to connect the radio frequency signal feeding point of the circuit board; the side radiation surface is connected to the signal radiation main body, the side radiation surface is located on one side of the signal radiation main body and is beside the grounding pin or the radio frequency signal pin.

[0007] Optionally, the antenna further includes a turning arm, and the side radiation surface is connected to the signal radiation main body through the turning arm.

[0008] Optionally, the turning arm is located at the end of one end of the signal radiation body on the side away from the RF signal pin of the ground pin.

[0009] Optionally, the antenna further includes an extension arm, which is arranged at the end of one end of the signal radiation body on the side away from the ground pin of the RF signal pin and extends in the thickness direction of the signal radiation body.

[0010] Optionally, the length of the ground pin and the RF signal pin is 6 - 8 mm, the length of the signal radiation body is 23 - 25 mm, the length of the side radiation surface is 11 - 13 mm, and the width is 4.5 - 6.5 mm.

[0011] Optionally, the length of the turning arm is 2 - 4 mm.

[0012] Optionally, the length of the extension arm is 3 - 5 mm.

[0013] The present utility model also discloses an antenna, including a signal radiation body, a ground pin, an RF signal pin, a side radiation surface, a turning arm and an extension arm; the ground pin is connected to one end of the signal radiation body, the RF signal pin is connected to the signal radiation body and is spaced beside the ground pin; the ground pin is used to connect the GND of the circuit board, and the RF signal pin is used to connect the RF signal feeding point of the circuit board.

[0014] The extension arm is located at the end of one end of the signal radiation body on the side away from the RF signal pin of the ground pin, the side radiation surface is connected to the signal radiation body through the turning arm, the side radiation surface is located on one side of the signal radiation body and beside the ground pin.

[0015] The extension arm is arranged at the end of one end of the signal radiation body on the side away from the ground pin of the RF signal pin and extends in the thickness direction of the signal radiation body.

[0016] The length of the ground pin and the RF signal pin is 6 - 8 mm, the length of the signal radiation body is 23 - 25 mm, the length of the side radiation surface is 11 - 13 mm, the width of the side radiation surface is 4.5 - 6.5 mm, the length of the turning arm is 2 - 4 mm, and the length of the extension arm is 3 - 5 mm.

[0017] The present utility model also discloses a circuit board, including a board body and the above-mentioned antenna; the antenna is arranged on the board body.

[0018] The present utility model also discloses a wireless screen mirroring device, including the above-mentioned antenna, or the above-mentioned circuit board.

[0019] Compared with the prior art, the beneficial effects of the antenna provided by the embodiment of the present utility model are as follows: By providing a side radiation surface, the antenna of the present utility model has two signal radiation parts, namely a signal radiation main body and a side radiation surface. The signal radiation main body is the main part of signal radiation, and the side radiation surface can enhance the radiation pattern of the antenna on the side, improve the radiation efficiency and gain of the antenna, significantly improve the signal transmission, and further improve the signal coverage range and transmission distance, thereby alleviating problems such as video images may be compressed, image quality may be reduced, and even image freezing may occur when the network environment is poor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solutions of the present utility model will be further described in detail below in conjunction with the drawings, in which:

[0021] Figure 1 is the front view of the antenna in the embodiment of the present utility model;

[0022] Figure 2 is the top view of the antenna in the embodiment of the present utility model;

[0023] Figure 3 is the schematic diagram of the circuit board in the embodiment of the present utility model.

[0024] Each reference numeral in the drawings is as follows:

[0025] 1. Circuit board; 11. Antenna; 111. Signal radiation main body; 112. Ground pin; 113. RF signal pin; 114. Side radiation surface; 115. Turning arm; 116. Extension arm; 12. Plate body; 13. Main control IC; 14. RF module; 15. Tactile button; 16. Type-C interface; 17. HDMI interface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. Now, in conjunction with the drawings, the preferred embodiments of the present utility model will be described in detail.

[0027] The embodiment of the present utility model provides an antenna 11, as Figures 1 to 3 shown, the antenna 11 includes a signal radiation main body 111, a ground pin 112, an RF signal pin 113 and a side radiation surface 114. The ground pin 112 is connected to one end of the signal radiation main body 111, and the RF signal pin 113 is connected to the signal radiation main body 111 and is spaced beside the ground pin 112; the ground pin 112 is used to connect to the GND of the circuit board 1, and the RF signal pin 113 is used to connect to the RF signal feeding point of the circuit board 1. The side radiation surface 114 is connected to the signal radiation main body 111, the side radiation surface 114 is located on one side of the signal radiation main body 111, and is located beside the ground pin 112 or the RF signal pin 113.

[0028] The antenna 11 of the present utility model has two signal radiation parts, namely a signal radiation main body 111 and a side radiation surface 114, by setting the side radiation surface 114. The signal radiation main body 111 is the main part of signal radiation, and the side radiation surface 114 can enhance the radiation pattern of the antenna 11 on the side, improve the radiation efficiency and gain of the antenna 11, significantly improve the signal transmission, and further improve the signal coverage range and transmission distance, thereby reducing the problems that the video picture may be compressed, the picture quality may be reduced, and even the picture may freeze when the network environment is poor.

[0029] Moreover, when the antenna 11 of the present utility model is applied, it is welded to the circuit board 1 through the grounding pin 112 and the RF signal pin 113. Compared with the on-board antenna directly engraved on the circuit board, both sides of the signal radiation main body 111 and the side radiation surface 114 serve as signal radiation surfaces. At the same time, the signal radiation main body 111 and the side radiation surface 114 are relatively far from the circuit board 1 and the metal shielding cover on the circuit board 1, etc., with less signal absorption or interference, a better radiation environment, and better radiation efficiency and gain of the antenna 11.

[0030] The signal radiation main body 111 is the main part of signal radiation, and electromagnetic waves are mainly radiated from this part. The grounding pin 112 is a ground feed (Ground-Plane Antenna) of the antenna, and its main function is to provide a reflecting surface to form an image current, thereby enhancing the radiation performance of the antenna 11. The RF signal pin 113 is the feed point (antenna feed) of the antenna 11, that is, the input and output point of the signal on the entire circuit board 1, and it is located at the center of the antenna 11. The side radiation surface 114 can enhance the radiation pattern of the antenna 11 on the side. The antenna 11 is a metal antenna, and it can be applied to a wireless screen mirroring device, and the wireless screen mirroring device transmits audio and video through WIFI.

[0031] Furthermore, the antenna 11 further includes a turning arm 115, and the side radiation surface 114 is connected to the signal radiation main body 111 through the turning arm 115. The side radiation surface 114 turns to one side of the signal radiation main body 111 through the connection of the turning arm 115, and the turning arm 115 connects the radiation side surface and the signal radiation main body 111. Specifically, the turning arm 115 is located at the end of one end of the signal radiation main body 111 on the side far from the RF signal pin 113 of the grounding pin 112. In this way, the side radiation surface 114 connected to the turning arm 115 is located on the side far from the RF signal pin 113 of the grounding pin 112.

[0032] Furthermore, the antenna 11 further includes an extension arm 116. The extension arm 116 is disposed on the signal radiation body 111 and extends in the thickness direction of the signal radiation body 111. The extension arm 116 is located at the end of one end of the radio frequency signal pin 113 on the signal radiation body 111 away from the ground pin 112. The setting of the extension arm 116 can tune the resonant frequency of the antenna 11 to the operating frequency 2.4G of WIFI. Specifically, the operating frequency of WIFI has two frequency bands, 2.4G and 5G. The antenna 11 of the present utility model adds a turning extension arm 116 at the tail of the antenna 11 to increase the length of the antenna 11, so that the routing of the antenna 11 can reach the length that generates 2.4G resonance.

[0033] Specifically, the lengths L1 of the ground pin 112 and the radio frequency signal pin 113 are 6 - 8 mm, the length L2 of the signal radiation body 111 is 23 - 25 mm, the length L3 of the side radiation surface 114 is 11 - 13 mm, and the width W1 is 4.5 - 6.5 mm. The antenna 11 of the present utility model can be applied to a wireless screen mirroring device. According to the product design of the wireless screen mirroring device, setting the lengths of the ground pin 112, the radio frequency signal pin 113, the signal radiation body 111 and the side radiation surface 114, and the width of the side radiation surface 114 within the above ranges can achieve greater space utilization and improve the signal radiation effect. Specifically, the length L1 of the ground pin 112 and the radio frequency signal pin 113 can be any one of 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, the length L2 of the signal radiation body 111 can be any one of 23 mm, 23.5 mm, 24 mm, 24.5 mm, 25 mm, the length L3 of the side radiation surface 114 can be any one of 11 mm, 11.5 mm, 12 mm, 12.5 mm, 13 mm, and the width W1 can be any one of 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm.

[0034] Furthermore, the length L4 of the turning arm 115 is 2 - 4 mm, and the length L5 of the extension arm 116 is 3 - 5 mm. Specifically, the length L4 of the turning arm 115 can be any one of 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, and the length L5 of the extension arm 116 can be any one of 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm.

[0035] The present utility model also discloses a circuit board 1, which includes a board body 12 and the above-mentioned antenna 11; the antenna 11 is disposed on the board body 12. Since the circuit board 1 has the above-mentioned antenna 11, it also has the same technical effects as the antenna 11, which will not be elaborated here. Specifically, the ground pin 112 and the radio frequency signal pin 113 of the antenna 11 are soldered on the board body 12 of the circuit board 1.

[0036] Further, a main control IC 13 (model: Actions AM8275), a radio frequency module 14, a touch button 15, a type-C interface 16, and an HDMI interface 17 are also provided on the circuit board 1, all of which can be set by conventional technologies and will not be elaborated herein.

[0037] The present utility model also discloses a wireless screen mirroring device, which includes the above-mentioned antenna 11 or the above-mentioned circuit board 1. Since the wireless screen mirroring device has the above-mentioned circuit board 1 or antenna 11, it also has the same technical effects as the circuit board 1 or antenna 11, which will not be elaborated herein.

[0038] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some of the technical features can be equivalently replaced; and all such modifications and replacements should fall within the protection scope of the appended claims of the present utility model.

Claims

1. An antenna, characterized in that, It includes a signal radiation body, a ground pin, a radio frequency signal pin and a side radiation surface; the ground pin is connected to one end of the signal radiation body, the radio frequency signal pin is connected to the signal radiation body and is spaced beside the ground pin; the ground pin is used to connect to the GND of the circuit board, and the radio frequency signal pin is used to connect to the radio frequency signal feed-in point of the circuit board; the side radiation surface is connected to the signal radiation body, the side radiation surface is located on one side of the signal radiation body, and is located beside the ground pin or the radio frequency signal pin.

2. The antenna according to claim 1, wherein The antenna further includes a turning arm, and the side radiation surface is connected to the signal radiation body through the turning arm.

3. The antenna according to claim 2, characterized in that, The turning arm is located at the end of the end of the signal radiation body on the side away from the radio frequency signal pin of the ground pin.

4. The antenna according to claim 1, characterized in that, The antenna further includes an extension arm, and the extension arm is arranged at the end of the end of the signal radiation body on the side away from the ground pin of the radio frequency signal pin, and extends in the thickness direction of the signal radiation body.

5. The antenna according to any one of claims 1 to 4, characterized in that, The lengths of the ground pin and the radio frequency signal pin are 6 - 8 mm, the length of the signal radiation body is 23 - 25 mm, the length of the side radiation surface is 11 - 13 mm, and the width is 4.5 - 6.5 mm.

6. The antenna according to claim 2, wherein, The length of the turning arm is 2 - 4 mm.

7. The antenna according to claim 4, characterized in that The length of the extension arm is 3 - 5 mm.

8. An antenna, characterized in that, It includes a signal radiation body, a ground pin, a radio frequency signal pin, a side radiation surface, a turning arm and an extension arm; the ground pin is connected to one end of the signal radiation body, the radio frequency signal pin is connected to the signal radiation body and is spaced beside the ground pin; the ground pin is used to connect to the GND of the circuit board, and the radio frequency signal pin is used to connect to the radio frequency signal feed-in point of the circuit board; The extension arm is located at the end of the end of the signal radiation body on the side away from the radio frequency signal pin of the ground pin, the side radiation surface is connected to the signal radiation body through the turning arm, the side radiation surface is located on one side of the signal radiation body, and is located beside the ground pin; The extension arm is arranged at the end of the end of the signal radiation body on the side away from the ground pin of the radio frequency signal pin, and extends in the thickness direction of the signal radiation body; The lengths of the ground pin and the radio frequency signal pin are 6 - 8 mm, the length of the signal radiation body is 23 - 25 mm, the length of the side radiation surface is 11 - 13 mm, the width of the side radiation surface is 4.5 - 6.5 mm, the length of the turning arm is 2 - 4 mm, and the length of the extension arm is 3 - 5 mm.

9. A circuit board, characterized in that, It includes a board body and the antenna according to any one of claims 1 to 7 or claim 8; the antenna is arranged on the board body.

10. A wireless screen mirroring device, characterized in that, It includes the antenna according to any one of claims 1 - 7 or claim 8, or the circuit board according to claim 9.

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