antenna

Abstract

The present invention discloses an antenna, which is etched and formed in one piece on a module PCB, and the antenna includes a wifi antenna and a bluetooth antenna. Compared with the prior art, in terms of manufacturing materials and processes, most of the common iron antennas on the market are made of stainless steel and pressed and formed by a specific mold, while the antenna of the present invention is formed by etching the copper sheet on a copper-clad plate with a thickness of 40um; in terms of usage, the iron antenna needs to be welded to the module or connected with a tinned copper wire and an IPEX seat and then buckled to the module for use in the later use, and the technical solution can be designed in the module PCB, etched and formed in one piece, which reduces the production cost of the material, has good corrosion resistance, and does not need to open an antenna mold, which is convenient for making samples and mass production; the antenna shape is fully exposed and etched on the board by a machine according to the drawing, so the difference between the finished products is small, the production technology requirements are not high, the cost is low, and the production efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and in particular to an antenna integrated on a PCB board. Background Art

[0002] The antennas in existing smart devices can support 2.4G and 5G frequency bands, have dual-transmit and dual-receive functions, can support receiving and sending Bluetooth and WIFI signals, and the line impedance leading out from the RF feedback point is 50Ω. It occupies a small space and can be placed in smart devices to adapt to a variety of smart wireless devices.

[0003] However, the antennas in existing smart devices have the following shortcomings:

[0004] The material cost of production is high, the antenna metal is exposed to the air and has poor corrosion resistance. It needs to be manually installed at a specific position of the machine when used, which reduces production efficiency and increases labor costs. Summary of the invention

[0005] The main purpose of the present invention is to provide an antenna which can reduce costs, has good corrosion resistance and high production efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides an antenna, which is etched and integrally formed on a module PCB, and includes a wifi antenna and a bluetooth antenna.

[0007] There are two wifi antennas, the Bluetooth antenna is located in the middle of the PCB, and the two wifi antennas are respectively located on both sides of the Bluetooth antenna.

[0008] Among them, the wifi antenna is in an "L" shape, and there is a short line at the bottom of the "L" shape parallel to the short side of the "L" to adjust the matching frequency; the Bluetooth antenna is in a rectangular shape, and there is an "L"-shaped groove inside the rectangle facing downward to the bottom.

[0009] The Wi-Fi antenna plus the clearance area is a rectangle as a whole, 22.3 mm long and 8.3 mm wide; plus the clearance area, the Bluetooth antenna is 32 mm long and 17.7 mm wide.

[0010] Among them, the wifi antenna has an RF feed line and a ground feed line connected, and the Bluetooth antenna has an RF feed line connected to the wifi antenna module.

[0011] Among them, the working frequency band of the wifi antenna covers the entire 2.4G and 5G ISM frequency bands, and the maximum gain is 4dB; the working frequency band of the Bluetooth antenna covers the entire 2.4G ISM frequency band, and the maximum gain is 2.5dB.

[0012] The PCB board is 1.2 mm thick and the surface copper foil is 40 um thick; the antenna is etched on the surface copper foil of the module PCB.

[0013] Among them, the distance between each antenna is not less than 5.8mm.

[0014] The beneficial effects of the present invention are as follows: the antenna provided by the present invention is etched and formed in one piece on the module PCB, and the antenna includes a wifi antenna and a Bluetooth antenna. Compared with the prior art, in terms of manufacturing materials and processes, most of the common iron antennas on the market are made of stainless steel and are pressed and formed by a specific mold. The antenna of the present invention uses copper foil on a copper-clad plate with a thickness of 40um and is etched and formed; in terms of usage, the iron antenna needs to be welded to the module or connected with a tinned copper wire and an IPEX socket and then buckled to the module for use. The technical solution can be designed in the module PCB, etched and formed in one piece, which reduces the production cost of the material, has good corrosion resistance, and does not require an antenna mold, which is convenient for making samples and mass production; the shape of the antenna is exposed and etched on the board by the machine according to the drawing, so the difference between the finished products is small, the production technology requirements are not high, the cost is low, and the production efficiency is high. 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the antenna of the present invention;

[0017] Figure 2 The figure is a schematic diagram of the dimensions of the antenna of the present invention on a PCB board.

[0018] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0020] Please refer to Figure 1 to Figure 2The present invention proposes an antenna, which is a design scheme that uses a printed PCB board as an antenna.

[0021] The antenna is etched and formed integrally on the module PCB, and the antenna includes a wifi antenna and a bluetooth antenna.

[0022] There are two wifi antennas, the Bluetooth antenna is located in the middle of the PCB, and the two wifi antennas are respectively located on both sides of the Bluetooth antenna.

[0023] Among them, the wifi antenna is in an "L" shape, and there is a short line at the bottom of the "L" shape parallel to the short side of the "L" to adjust the matching frequency; the Bluetooth antenna is in a rectangular shape, and there is an "L"-shaped groove inside the rectangle facing downward to the bottom.

[0024] The Wi-Fi antenna plus the clearance area is a rectangle as a whole, 22.3 mm long and 8.3 mm wide; plus the clearance area, the Bluetooth antenna is 32 mm long and 17.7 mm wide.

[0025] Among them, the wifi antenna has an RF feed line and a ground feed line connected, and the Bluetooth antenna has an RF feed line connected to the wifi antenna module.

[0026] Among them, the working frequency band of the wifi antenna covers the entire 2.4G and 5G ISM frequency bands, and the maximum gain is 4dB; the working frequency band of the Bluetooth antenna covers the entire 2.4G ISM frequency band, and the maximum gain is 2.5dB.

[0027] The PCB board is 1.2 mm thick and the surface copper foil is 40 um thick; the antenna is etched on the surface copper foil of the module PCB.

[0028] Among them, the distance between each antenna is not less than 5.8mm.

[0029] The scheme of the present invention is described in detail below:

[0030] like Figure 1 As shown, in Figure 1 Among them, ① and ⑤ are the WiFi antenna and its corresponding RF feed point, which is the main part of the antenna, responsible for sending and receiving WiFi signals from the air and transmitting them to the receiver for output.

[0031] ② and ④ are the WiFi antenna and its corresponding ground feed point, which form an "inverted F structure" with the RF antenna. The frequency can be effectively adjusted by adjusting the length. Currently, 2.4G and 5G frequency bands are supported.

[0032] ③ is the Bluetooth antenna and its corresponding Bluetooth feed point, which has the same function as the WiFi antenna and operates at a frequency band of around 2.4G.

[0033] ⑥ is the clearance area of ​​the antenna on the PCB board. All the copper foil layers on the upper and lower sides are hollowed out. There should be no other copper foil or traces in the clearance area except the antenna. Ensure that at least one or two directions of the antenna are empty, which will have a better effect on the antenna.

[0034] ⑦ The other places on the PCB board except the antenna are reserved for the antenna impedance matching circuit and the wifi module circuit, which can be appropriately lengthened as needed.

[0035] More specifically, the present invention adopts a design scheme of using a printed PCB board as an antenna, wherein, Figure 1 As shown, the WiFi antenna component is generally in an "L" shape, with a short line at the bottom of the "L" parallel to the short side of the "L" to adjust the matching frequency. The WiFi antenna with the clearance area is a rectangle with a length of 22.3mm and a width of 8.3mm. It should be noted that in other embodiments, the size of the WiFi antenna can be adjusted according to actual conditions, and this embodiment does not limit this.

[0036] The Bluetooth antenna is generally rectangular, with an "L"-shaped slot downwardly extending to the bottom of the rectangle. The overall length of the Bluetooth antenna including the clearance area is 32 mm and the width is 17.7 mm. It should be noted that in other embodiments, the size of the Bluetooth antenna can be adjusted according to actual conditions, and this embodiment does not limit this.

[0037] Among them, as an implementation method, the PCB board thickness is 1.2mm and the surface copper foil thickness is 40um.

[0038] In the antenna structure, the wifi antennas in this embodiment are two, the Bluetooth antenna is located in the middle of the PCB, and the two wifi antennas are located on both sides of the Bluetooth antenna. Figure 1 As mentioned above, from left to right are the WiFi0 antenna, Bluetooth antenna, and WiFi1 antenna, and the antenna spacing must not be less than 5.8mm.

[0039] The antenna of this embodiment is integrally formed by PCB etching, which greatly reduces the cost and is applied to Bluetooth and WIFI module integration. It occupies a small space and can be placed in the inner shell of the machine.

[0040] Among them, the WiFi antenna has an RF feed line and a ground feed line, and the Bluetooth antenna has an RF feed line, which can be connected to a WiFi module, etc.

[0041] The principle is that it is a device that forms electrodes by designing a specific shape to convert the high-frequency electric field formed between the antenna and the ground into electromagnetic waves. It can also induce electromagnetic waves transmitted from the air into electric fields, generate high-frequency signal voltage, and send it to the receiving chip for signal processing.

[0042] After debugging, the working frequency band of the WiFi antenna covers the entire 2.4G and 5G ISM bands with a maximum gain of about 4dB. The working frequency band of the Bluetooth antenna covers the entire 2.4G ISM band with a maximum gain of about 2.5dB.

[0043] The beneficial effects of the present invention are as follows: the antenna provided by the present invention is etched and formed in one piece on the module PCB, and the antenna includes a wifi antenna and a Bluetooth antenna. Compared with the prior art, in terms of manufacturing materials and processes, most of the common iron antennas on the market are made of stainless steel and are pressed and formed by a specific mold. The antenna of the present invention uses copper foil on a copper-clad plate with a thickness of 40um and is etched and formed; in terms of usage, the iron antenna needs to be welded to the module or connected with a tinned copper wire and an IPEX socket and then buckled to the module for use. The technical solution can be designed in the module PCB, etched and formed in one piece, which reduces the production cost of the material, has good corrosion resistance, and does not require an antenna mold, which is convenient for making samples and mass production; the shape of the antenna is exposed and etched on the board by the machine according to the drawing, so the difference between the finished products is small, the production technology requirements are not high, the cost is low, and the production efficiency is high.

[0044] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An antenna, characterized in that: The antenna is etched and formed integrally on the surface copper foil of the module PCB, and the antenna includes a wifi antenna and a bluetooth antenna; There are two wifi antennas, the Bluetooth antenna is located in the middle of the PCB, and the two wifi antennas are respectively located on both sides of the Bluetooth antenna; The wifi antenna is in an "L" shape, with a short line at the bottom of the "L" parallel to the short side of the "L" to adjust the matching frequency; the Bluetooth antenna is in a rectangular shape, with an "L"-shaped slot inside the rectangle facing downward to the bottom.

2. The antenna according to claim 1, characterized in that The Wi-Fi antenna plus the clearance area is a rectangle as a whole, 22.3 mm long and 8.3 mm wide; including the clearance area, the Bluetooth antenna is 32 mm long and 17.7 mm wide.

3. The antenna according to claim 1, characterized in that The wifi antenna has an RF feeder line and a ground feeder line connected thereto, and the Bluetooth antenna has an RF feeder line connected thereto, which is connected to the wifi antenna module.

4. The antenna according to claim 1, characterized in that: The working frequency band of the wifi antenna covers the entire 2.4G and 5G S M frequency bands, with a maximum gain of 4dB; the working frequency band of the Bluetooth antenna covers the entire 2.4G S M frequency band, with a maximum gain of 2.5dB.

5. The antenna according to claim 1, characterized in that The PCB board thickness is 1.2mm and the surface copper foil thickness is 40um.

6. The antenna according to claim 1, characterized in that The distance between antennas shall not be less than 5.8 mm.

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