Dual-frequency multi-interface WiFi and BT module
By designing dual-band and multi-interface WiFi and BT modules, supporting 2.4GHz and 5GHz dual-band connections and multiple interfaces, the problem of single selection of existing modules is solved, the demand for high-speed applications is achieved, and the shielding structure is reduced Signal interference.
Patent Information
- Application Number
- CN202323615969.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2033-12-28
AI Technical Summary
Existing WiFi and BT modules generally have only one interface or only support one frequency band, resulting in a single user selection method that cannot meet the needs of high-speed applications.
Design a dual-band and multi-interface WiFi and BT module, including WiFi main control module, power module, crystal oscillator module and wireless module, supports dual-band connections of 2.4GHz and 5GHz, and provides multiple interfaces, such as PCIE2.0 and SDIO3 .0, USB3.0, UART interfaces, using SCM2625 SOC system integrated circuit, the power module and crystal oscillator module provide multiple voltages and oscillation frequencies, set up independent BT antennas, and integrate them in the shielded shell to reduce signal interference.
It realizes user-selectable multi-band and multi-interface support, improves the interface rate and flexibility of the module, meets the needs of high-speed applications, and reduces signal interference through the shielded shell.
Smart Images
Figure CN222283249U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a WiFi and BT module, in particular to a dual-frequency and multi-interface WiFi and BT module. Background Art
[0002] Wireless communication module, also called wireless communication module, is simply a combination of chip + software. It is the communication basis in the Internet of Things, the entrance for different IoT terminal devices to access the Internet of Things, and provides network information transmission capabilities for terminals. WiFi and BT modules have both Wi-Fi6 and Bluetooth wireless connection modes;
[0003] Currently commonly used WiFi and BT modules generally have only one interface, or only support one frequency band, the options available to users are relatively simple, and the interface rate is slow, which may not meet the needs of high-speed applications. Utility Model Content
[0004] The purpose of the utility model is to solve the technical problem that the existing WiFi and BT modules generally have only one interface, or only support one frequency band, and the options available to users are relatively single, and to provide a dual-band multi-interface WiFi and BT module.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A dual-band multi-interface WiFi and BT module, which is special in that:
[0007] Including WiFi main control module, power module, crystal oscillator module and wireless module;
[0008] The WiFi main control module supports WiFi dual-band connection and is equipped with multiple interfaces and an independent BT antenna;
[0009] The power module is electrically connected to the power supply end of the WiFi main control module, and is used to provide a variety of different voltages for the WiFi main control module;
[0010] The crystal oscillator module is electrically connected to the frequency input terminal of the WiFi main control module, and is used to provide two different oscillation frequencies for the WiFi main control module;
[0011] One end of the wireless module is electrically connected to the signal end of the WiFi main control module through a filter, and is used for sending and receiving WiFi and BT signals.
[0012] Furthermore, the WiFi main control module adopts the SCM2625 SOC system integrated circuit, the WiFi dual-band connection includes 2.4GHz and 5GHz, and multiple interfaces include PCIE2.0 interface, SDIO3.0 or 2.0 or 1.1 interface, USB3.0 or 2.0 interface, UART interface, and PCM2.0 interface.
[0013] Further, the power module includes a linear regulator and a power chip electrically connected to the WiFi main control module respectively;
[0014] The linear regulator is used to realize the conversion between 5V voltage and 3.3V voltage;
[0015] The power chip is used to realize the conversion between 5V voltage and 2.2V and 1.8V voltage.
[0016] Further, the crystal oscillator module includes a passive crystal oscillator unit and an active crystal oscillator unit electrically connected to the WiFi main control module respectively;
[0017] The passive crystal oscillator unit is used to provide an 80MHz oscillation frequency for the WiFi main control module;
[0018] The active crystal oscillator unit is used to provide an oscillation frequency of 32KHz for the WiFi main control module.
[0019] Furthermore, it also includes a shielding shell; the WiFi main control module, the power module, the crystal oscillator module, and the wireless module are all arranged in the shielding shell;
[0020] The shielding shell is connected to the substrate of the WiFi main control module; multiple interfaces of the WiFi main control module are respectively led out to the outside of the shielding shell through the PCB board;
[0021] The input terminal of the power module is led out of the shielding shell for connecting to an external power supply.
[0022] Furthermore, the shielding shell is made of stainless steel and is welded to the substrate of the WiFi main control module through positioning holes.
[0023] Furthermore, the wireless module adopts a radio frequency coaxial connector.
[0024] Compared with the prior art, the beneficial effects of the utility model are:
[0025] The utility model provides a dual-band multi-interface WiFi and BT module, which supports WiFi dual-band connection, 2.4GHz / 5GHz; it also has a PCIE2.0 interface, an SDIO3.0 / 2.0 / 1.1 interface, a USB3.0 / 2.0 interface, a UART interface, and a PCM2.0 interface, so that users can choose different ways to use it. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;
[0027] Figure 2 It is a circuit diagram of a wireless module in an embodiment of the utility model;
[0028] Figure 3 This is a schematic diagram of the first circuit of the WiFi main control module in the embodiment of the utility model;
[0029] Figure 4 This is a schematic diagram of the second circuit of the WiFi main control module in the embodiment of the utility model;
[0030] Figure 5 This is a schematic diagram of the third circuit of the WiFi main control module in the embodiment of the utility model;
[0031] Figure 6 This is a schematic diagram of the fourth circuit of the WiFi main control module in the embodiment of the utility model. DETAILED DESCRIPTION
[0032] In order to make the purpose, advantages and features of the utility model clearer, the following is a further detailed description of a dual-band multi-interface WiFi and BT module proposed by the utility model in combination with the accompanying drawings and specific embodiments. According to the following specific implementation methods, the advantages and features of the utility model will be clearer. It should be noted that: the accompanying drawings are all in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model; secondly, the structure shown in the accompanying drawings is often part of the actual structure.
[0033] This embodiment provides a dual-band multi-interface WiFi and BT module, which has the advantages of multiple optional frequency bands, rich interface types and good shielding structure.
[0034] Specifically, refer to Figure 1 (Shielding shell not shown), the module includes a WiFi main control module, a power module, a crystal oscillator module, a wireless module and a shielding shell.
[0035] The shielding shell is made of stainless steel, and of course, other metal or non-metal materials, such as copper, can also be used. The WiFi main control module, power module, crystal oscillator module, and wireless module are all arranged in the shielding shell. The shielding shell is directly welded to the substrate of the WiFi main control module through the preset positioning holes to achieve the purpose of reducing signal interference; in the preferred embodiment of the utility model, the shielding shell can adopt both half-enclosed and full-enclosed structures at the same time, which can further reduce signal interference.
[0036] The WiFi main control module uses the SCM2625 SOC system integrated circuit. The circuit diagram can be found in Figure 3-Figure 6 The WiFi master module supports 2.4GHz and 5GHz WiFi dual-band connections, and has PCIE2.0 interface, SDIO3.0 or 2.0 or 1.1 interface, USB3.0 or 2.0 interface, UART interface and BT interface, PCM2.0 interface, and independent BT antenna. Each interface is led out to the outside of the shielding shell through the PCB board, and the corresponding peripheral circuit can be built for use.
[0037] The power module includes a linear regulator and a power chip that are electrically connected to the WiFi main control module. The SK6013AD4-18 linear regulator is used to directly output 1.8V voltage from 3.3V voltage, and the SK6013AD4-3.0 linear regulator directly outputs 3.3V voltage. The SGM6033 DCDC power chip is configured with output resistor R1 of 38.3K and R3 of 200K, outputting 0.95V voltage, and output resistor R2 of 360K and R4 of 200K, outputting 2.2V voltage to power the WiFi main control module.
[0038] The crystal oscillator module is electrically connected to the frequency input terminal of the WiFi main control module to provide two different oscillation frequencies for the WiFi main control module. The crystal oscillator module includes a passive crystal oscillator unit and an active crystal oscillator unit. Specifically, the passive crystal oscillator of ECS-800-8-37B-JGN-TR is connected to the G16 and H16 pins of the WiFi main control module to input 80MHz to the WiFi main control module, and the active crystal oscillator of S2D32.768KD20F30T is connected to the V11 pin of the WiFi main control module to input a frequency of 32KHz to the WiFi main control module.
[0039] The circuit diagram of the antenna module can be found at Figure 2 The antenna module selects the IPEX series RF coaxial connector, one end of which is connected to the WiFi main control module through the RFDIP1606L24T full-duplex common mode filter for sending and receiving WiFi and BT signals.
Claims
1. A dual-band multi-interface WiFi and BT module, characterized in that: Including WiFi main control module, power module, crystal oscillator module and wireless module; The WiFi master control module supports WiFi dual-band connection and is provided with multiple interfaces and an independent BT antenna; The power supply module is electrically connected to the power supply end of the WiFi main control module, and is used to provide a variety of different voltages for the WiFi main control module; The crystal oscillator module is electrically connected to the frequency input terminal of the WiFi main control module, and is used to provide two different oscillation frequencies for the WiFi main control module; One end of the wireless module is electrically connected to the signal end of the WiFi main control module through a filter, and is used for sending and receiving WiFi and BT signals.
2. A dual-band multi-interface WiFi and BT module according to claim 1, characterized in that: The WiFi main control module adopts the SCM2625 SOC system integrated circuit, the WiFi dual-band connection includes 2.4GHz and 5GHz, and the multiple interfaces include PCIE2.0 interface, SDIO3.0 or 2.0 or 1.1 interface, USB3.0 or 2.0 interface, UART interface, and PCM2.0 interface.
3. A dual-band multi-interface WiFi and BT module according to claim 2, characterized in that: The power module includes a linear regulator and a power chip which are electrically connected to the WiFi main control module respectively; The linear voltage regulator is used to realize the conversion between 5V voltage and 3.3V voltage; The power chip is used to realize the conversion between 5V voltage and 2.2V and 1.8V voltage.
4. The dual-band multi-interface WiFi and BT module according to claim 3, characterized in that: The crystal oscillator module includes a passive crystal oscillator unit and an active crystal oscillator unit which are electrically connected to the WiFi main control module respectively; The passive crystal oscillator unit is used to provide an oscillation frequency of 80 MHz for the WiFi main control module; The active crystal oscillator unit is used to provide an oscillation frequency of 32KHz for the WiFi main control module.
5. A dual-band multi-interface WiFi and BT module according to any one of claims 1 to 4, characterized in that: It also includes a shielding shell; the WiFi main control module, power module, crystal oscillator module, and wireless module are all arranged in the shielding shell; The shielding shell is connected to the substrate of the WiFi main control module; multiple interfaces of the WiFi main control module are respectively led out to the outside of the shielding shell through the PCB board; The input end of the power module is led out to the outside of the shielding shell for connecting to an external power supply.
6. A dual-band multi-interface WiFi and BT module according to claim 5, characterized in that: The shielding shell is made of stainless steel and is welded on the substrate of the WiFi main control module through positioning holes.
7. The dual-band multi-interface WiFi and BT module according to claim 6, characterized in that: The wireless module adopts a radio frequency coaxial connector.