Novel double-frequency WIFI module

Abstract

The utility model relates to the technical field of communication modules, in particular to a novel double-frequency WIFI module which comprises a PCB mainboard, a chip module is arranged at the end of the surface of one side of the PCB mainboard, and a fifth capacitor, a sixth capacitor and a seventh capacitor are arranged on the other side of the chip module from left to right. A crystal oscillator, a capacitance and inductance module assembly and a duplexer are sequentially arranged on the surface of the other end of one side surface of the PCB main board from top to bottom, 2.4 G + 5G dual-frequency ultra-small 7mm * 7mm PCB size in the industry is realized through the 7 * 7mm ultra-small size dual-frequency wifi + BT / BLE module and the precise layout of elements, and the module plays an important role in promoting the miniaturized product application of the dual-frequency wifi module in the market. And the overall practical efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication module technical field especially relates to a novel dual -frequency WIFI module. BACKGROUND

[0002] Through the search, the existing patent literature with CN213279624U discloses a WiFi module with dual-frequency antenna, including setting up substrate, main control IC, signal transceiver group and matching system, since signal transceiver includes transceiving radiating vibrator and bandwidth radiating vibrator, and transceiving radiating vibrator is coupled with bandwidth radiating vibrator, can produce better matching effect, to improve the bandwidth of frequency band, can receive the wireless signal in 2.4G and 5G range, let the WiFi module with dual-frequency antenna compatible more applicable scene, in addition, since the matching module is built-in two π type units, namely, one matching module corresponds to double π type circuit network, can greatly improve voltage standing wave ratio, let the WiFi module with dual-frequency antenna can better radiate high-frequency signal, furthermore, the setting of anti-static unit makes the WiFi module with dual-frequency antenna have the function of preventing static electricity, prevents excessive static current from damaging the WiFi module with dual-frequency antenna.

[0003] The existing dual-frequency WIFI module is 12mm*12mm and 13mm*15mm in size, and the minimum size of the dual-frequency WIFI module is 9mm*9mm, which is not precise enough, resulting in that the existing dual-frequency WIFI module is not conducive to the small size of the PCB of the terminal user due to the large size, causing low resource utilization, waste of PCB materials, and poor practical efficiency. UTILITARIAN CONTENT

[0004] The utility model solves the technical problem of overcoming the defects of the prior art, provides a novel dual-frequency WIFI module, and aims at solving the technical problem that the existing dual-frequency WIFI module is not conducive to the small size of the PCB of the terminal user due to the large size, causing low resource utilization, waste of PCB materials, and poor practical efficiency.

[0005] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0006] The utility model relates to a novel dual -frequency WIFI module, including PCB mainboard, and the PCB mainboard realizes the electrical connection between electronic components through the conductive copper foil circuit, one side surface end of PCB mainboard is provided with chip module, and the PCB mainboard size is 7mm * 7mm setting, one side of chip module is provided with first capacitor, inductor, second capacitor, third capacitor and fourth capacitor from left to right once, the other side of chip module is provided with fifth capacitor, sixth capacitor and seventh capacitor from left to right respectively, the other end surface of one side surface of PCB mainboard is sequentially provided with crystal oscillator, capacity inductor module assembly and duplexer from top to bottom.

[0007] As the further description of the above technical scheme:

[0008] The PCB mainboard realizes the electrical connection between electronic components through the conductive copper foil circuit, and the PCB mainboard and the chip module are connected and fixed through the conductive copper foil circuit, and the chip module is a WIFI chip with an SDIO interface.

[0009] As the further description of the above technical scheme:

[0010] The PCB mainboard, the first capacitor, the inductor, the second capacitor, the third capacitor and the fourth capacitor are connected and fixed through the conductive copper foil circuit, and the first capacitor, the second capacitor and the fourth capacitor are all set to 2.2uF, the third capacitor is set to 1uF, and the inductor is set to 4.7uH.

[0011] As the further description of the above technical scheme:

[0012] The PCB mainboard, the fifth capacitor, the sixth capacitor and the seventh capacitor are connected and fixed through the conductive copper foil circuit, and the fifth capacitor, the sixth capacitor and the seventh capacitor are all set to 1uF.

[0013] As the further description of the above technical scheme:

[0014] The PCB mainboard, the crystal oscillator, the capacity inductor module assembly and the duplexer are connected and fixed through the conductive copper foil circuit, and the capacity inductor module assembly includes two groups of capacitors with a capacity of 1uF and two groups of inductor modules with an inductance of 1.5nH and 1.2nH respectively, the crystal oscillator is set to 40MHz, and the duplexer is set to a 2.4G+5G wifi signal combiner.

[0015] As the further description of the above technical scheme:

[0016] The chip module is connected with the first capacitor, the inductor, the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth capacitor, the seventh capacitor, the crystal oscillator, the capacitance inductance module assembly and the diplexer through an SDIO interface data connection.

[0017] The utility model has the advantages of:

[0018] In the utility model, through the 7*7mm ultra-small size based on double -frenquency wifi + BT / BLE module, through the precision layout of element, the 2.4G + 5G double -frenquency ultra-small 7mm * 7mm PCB size of industry is realized, and it has important role to the miniaturization product application of double -frenquency wifi module of promoting market, the overall practical efficiency is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model.In the drawings:

[0020] Figure 1 It is the overall structure plane schematic diagram of the utility model;

[0021] Figure 2 It is the chip module circuit schematic diagram of the utility model;

[0022] Figure 3 It is the pad pin definition schematic diagram of PCB module of the utility model;

[0023] In the drawings: 1, PCB mainboard;2, chip module;3, first capacitor;4, inductor;5, second capacitor;6, third capacitor;7, fourth capacitor;8, fifth capacitor;9, sixth capacitor;10, seventh capacitor;11, crystal oscillator;12, capacitance inductance module assembly;13, diplexer. DETAILED DESCRIPTION

[0024] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0025] Wherein the same reference numerals in the drawings all refer to the same parts.

[0026] Example 1

[0027] Reference Figures 1-3The utility model provides a kind of embodiment: a novel dual-frequency WIFI module, including PCB mainboard 1, PCB mainboard 1 is connected by electrically conductive copper foil circuit between electronic components, and the surface end of one side of PCB mainboard 1 is provided with chip module 2, and the size of PCB mainboard 1 is 7mm*7mm setting, the first capacitor 3, inductor 4, second capacitor 5, third capacitor 6 and fourth capacitor 7 are sequentially provided with in chip module 2 one side from left to right, fifth capacitor 8, sixth capacitor 9 and seventh capacitor 10 are respectively provided with in chip module 2 other side from left to right, and crystal oscillator 11, capacity inductance module assembly 12 and duplexer 13 are sequentially provided with in the surface of other end of one side of PCB mainboard 1 from top to bottom.

[0028] PCB mainboard 1 is connected by electrically conductive copper foil circuit between electronic components, and chip module 2 is connected and fixed by electrically conductive copper foil circuit with PCB mainboard 1, and chip module 2 is WIFI chip with SDIO interface setting.

[0029] PCB mainboard 1 is connected and fixed by electrically conductive copper foil circuit with first capacitor 3, inductor 4, second capacitor 5, third capacitor 6 and fourth capacitor 7, and the capacity of first capacitor 3, second capacitor 5 and fourth capacitor 7 is all 2.2uF setting, the capacity of third capacitor 6 is 1uF setting, and the inductance of inductor 4 is 4.7uH setting.

[0030] PCB mainboard 1 is connected and fixed by electrically conductive copper foil circuit with fifth capacitor 8, sixth capacitor 9 and seventh capacitor 10, and the capacity of fifth capacitor 8, sixth capacitor 9 and seventh capacitor 10 is all 1uF setting.

[0031] PCB mainboard 1 is connected and fixed by electrically conductive copper foil circuit with crystal oscillator 11, capacity inductance module assembly 12 and duplexer 13, and capacity inductance module assembly 12 includes two groups of capacitors with 1uF capacity and two groups of inductance modules with 1.5nH and 1.2nH inductance respectively, the frequency of crystal oscillator 11 is 40MHz setting, and duplexer 13 is 2.4G+5G wifi signal combiner setting.

[0032] Chip module 2 is connected by SDIO interface data with first capacitor 3, inductor 4, second capacitor 5, third capacitor 6, fourth capacitor 7, fifth capacitor 8, sixth capacitor 9, seventh capacitor 10, crystal oscillator 11, capacity inductance module assembly 12 and duplexer 13.

[0033] Specifically, its structure is formed by the PCB mainboard 1, the chip module 2, the first capacitor 3, the inductor 4, the second capacitor 5, the third capacitor 6, the fourth capacitor 7, the fifth capacitor 8, the sixth capacitor 9, the seventh capacitor 10, the crystal oscillator 11, the capacitor-inductor module assembly 12 and the duplexer 13 to form a new dual-frequency WIFI module. The PCB mainboard 1 realizes electrical connection between electronic components through conductive copper foil lines, ensures accurate transmission of signals and currents, and is provided with a pin pad of QFN53 at the bottom to facilitate user welding on other PCB mainboards 1. The size of the PCB mainboard 1 is 7*7 mm, which meets the ultra-small size standard. The chip module 2 has a size of 5 mm*5 mm, and AIC8800Dxx series chips such as AIC8800D40, AIC8800D40L and AIC8800D80 can be used. The sizes of the capacitors in the first capacitor 3, the second capacitor 5, the third capacitor 6, the fourth capacitor 7, the fifth capacitor 8, the sixth capacitor 9, the seventh capacitor 10 and the capacitor-inductor module assembly 12 are all 0.6 mm*0.3 mm, as shown in FIG. 6. Figure 1 The first capacitor 3 is a filter capacitor for main power supply 3.3V, which can filter out noise and stabilize power supply. The second capacitor 5 is a filter capacitor for the inductor 4, which cooperates with the inductor 4 to output a stable 1.3V voltage. The third capacitor 6, the fifth capacitor 8, the sixth capacitor 9, the seventh capacitor 10 and the two groups of 1uF capacitors in the capacitor-inductor module assembly 12 are filter capacitors for the chip module 2, which can filter out noise and make the work more stable. The fourth capacitor 7 is a filter capacitor for main power supply 3.3V, which can filter out noise and make the work more stable. The inductor 4 is an inductor for the chip module 2 to output 1.3V, which has a size of 1.6 mm*0.8 mm. The 1.5nH inductor and the 1.2nH inductor in the capacitor-inductor module assembly 12 are used for the radio frequency signal grounding inductor of the chip module 2, which can make the radio frequency circuit unit of the chip module 2 work stably. The crystal oscillator 11 outputs a 40MHz clock signal to the chip module 2, and has a size of 1.6 mm*1.2 mm. The duplexer 13 makes the WIFI signal output only need one antenna, and has a size of 1.6 mm*0.8 mm. The new dual-frequency WIFI module can form a small communication module based on the 7*7 mm ultra-small size dual-frequency WIFI+BT / BLE module, the chip and various electronic components, which can effectively utilize resources and improve overall practical performance.

[0034] Working principle: the interfaces of the module, such as SDIO, uart, GPIO, power supply, etc. are connected to the external CPU and external power supply, and then 2.4G+5G wifi signals and 2.4G BT / BLE signals can be generated, the wifi signals can be connected to external wifi devices for signal transmission, and the BT / BLE signals can be connected to external BT / BLE devices for signal transmission. Figures 1-2 As shown, the module uses AIC8800Dxx series chips of Aike Microelectronics, the size of the series chips is 5mm*5mm, the module deletes the peripheral elements of the chips and the PIN8 and PIN9 pins which are not used, through precise layout, using the resin plug process of the PCB mainboard 1 via, the via is plugged with resin, and the pads are filled, so that the leads can be taken out and the pads are complete; after the dual-frequency wifi signals come out of the chip module 2, the module deletes the matching element of the duplexer 13 and leads out to the pins of the module; at the same time, the BT signal directly comes out of the chip and leads to the pins of the module. The 3.3V filtering capacitor of the main power supply is packaged with 0201 to save space, and the stable power supply from the outside will not affect the working stability of the module; the lead-out pins of the module are packaged with QFN at the bottom, so that the dual-frequency wifi+BT / BLE module is miniaturized to 7mm*7mm, which is convenient for the miniaturization of the user terminal. The wifi communication interface of the module is an SDIO interface, and the BT communication interface is a uart, the useful IO port of the chip module 2 is led out to the QFN53 pad at the bottom, and the pin definition is as shown. Figure 3

[0035] Usage process: 1, power supply for the new dual-frequency WIFI module; 2, external CPU loads the driver of the module; 3, external CPU applies and controls the signals of the module to realize the transmission of dual-frequency (2.4G+5.8G) wifi signals, and also can realize the transmission of BT / BLE signals; 4, the module supports AP mode and station mode to transmit wireless wifi signals.

[0036] Finally, it should be pointed out that the above-mentioned is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.​

Claims

1. A novel dual-band WIFI module, comprising a PCB motherboard (1), wherein the PCB motherboard (1) achieves electrical connection between electronic components through conductive copper foil lines, characterized in that, A chip module (2) is provided on one side of the PCB motherboard (1), and the PCB motherboard (1) is 7mm*7mm in size. A first capacitor (3), an inductor (4), a second capacitor (5), a third capacitor (6) and a fourth capacitor (7) are arranged on one side of the chip module (2) from left to right. A fifth capacitor (8), a sixth capacitor (9) and a seventh capacitor (10) are arranged on the other side of the chip module (2) from left to right. A crystal oscillator (11), a capacitor and inductor module assembly (12) and a duplexer (13) are arranged on the other side of one side of the PCB motherboard (1) from top to bottom.

2. The novel dual-band WIFI module according to claim 1, characterized in that, The PCB motherboard (1) and the chip module (2) are connected and fixed by conductive copper foil lines, and the chip module (2) is a WIFI chip with SDIO interface.

3. A novel dual-band WIFI module according to claim 1, characterized in that, The PCB motherboard (1) is connected and fixed to the first capacitor (3), inductor (4), second capacitor (5), third capacitor (6) and fourth capacitor (7) through conductive copper foil lines. The first capacitor (3), second capacitor (5) and fourth capacitor (7) are all set with a capacity of 2.2uF, the third capacitor (6) is set with a capacity of 1uF, and the inductance of the inductor (4) is set with an inductance of 4.7uH.

4. A novel dual-band WIFI module according to claim 1, characterized in that, The PCB motherboard (1) is connected and fixed to the fifth capacitor (8), the sixth capacitor (9) and the seventh capacitor (10) through conductive copper foil lines, and the capacitance of the fifth capacitor (8), the sixth capacitor (9) and the seventh capacitor (10) is set to 1uF.

5. A novel dual-band WIFI module according to claim 1, characterized in that, The PCB motherboard (1) is connected and fixed to the crystal oscillator (11), the capacitor and inductor module assembly (12) and the duplexer (13) through conductive copper foil lines. The capacitor and inductor module assembly (12) includes two sets of capacitors with a capacity of 1uF and two sets of inductors with inductance of 1.5nH and 1.2nH respectively. The crystal oscillator (11) is set to a frequency of 40MHz. The duplexer (13) is set to a 2.4G+5G WiFi signal combiner.

6. A novel dual-band WIFI module according to claim 1, characterized in that, The chip module (2) is connected to the first capacitor (3), inductor (4), second capacitor (5), third capacitor (6), fourth capacitor (7), fifth capacitor (8), sixth capacitor (9), seventh capacitor (10), crystal oscillator (11), capacitor and inductor module assembly (12) and duplexer (13) via SDIO interface data connection.

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