CN214707684U

CN214707684U - Anti-interference filter circuit for wireless reception

Info

Publication number: CN214707684U
Application number: CN202121187690.8U
Authority: CN
Inventors: 吴成林
Original assignee: Shenzhen Feitengyun Technology Co ltd
Current assignee: Shenzhen Feitengyun Technology Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-11-12
Anticipated expiration: 2031-05-28

Abstract

The utility model relates to a wireless transmission, especially indicate an anti-interference filter circuit for wireless reception, including host system, first filtering module and second filtering module, the second filtering module set up in the first filtering module with between the host system, the first filtering module includes wave filter and one-level filtering unit, the wave filter is used for receiving external signal, the one-level filtering unit set up in the input of wave filter; the filter, the first-stage filtering unit and the second filtering module are different in noise frequency. The utility model discloses a one-level filtering unit, wave filter and second filtering module constitute triple filtering structure, can effectually strain the outband interference noise that external environment brought to effectively reduce the packet error rate, promote wiFi actual data transmission rate and reduce the packet error rate, let the user use and use to have good experience.

Description

Anti-interference filter circuit for wireless reception

Technical Field

The utility model relates to a wireless transmission especially indicates an anti-interference filter circuit for wireless reception.

Background

Along with wireless products are more and more in the market, the current wireless transmission environment is more and more complicated, so that when the existing traditional WiFi product is used under the complex environment, the phenomena of reduction of transmission rate, larger and larger packet error rate and the like can occur, and the WiFi connection use experience effect in the actual life is seriously influenced.

Disclosure of Invention

The utility model discloses problem to prior art provides an anti-interference filter circuit for wireless reception, can promote the anti-interference effect.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a pair of an anti-interference filter circuit for wireless reception, including host system, first filtering module and second filtering module, the second filtering module set up in first filtering module with between the host system, first filtering module includes wave filter and one-level filtering unit, the wave filter is used for receiving external signal, one-level filtering unit sets up in the input of wave filter;

the filter, the first-stage filtering unit and the second filtering module are different in noise frequency.

Furthermore, the model of the filter is LFB212G45SG8a166, a fourth pin of the filter is connected to the first-stage filtering unit, a second pin of the filter is connected to the second filtering module, and both the first pin and the third pin of the filter are grounded.

Furthermore, the primary filtering unit comprises an inductor L7 and a capacitor C80, wherein one end of the inductor L7 is connected with the capacitor C80 in series and then is grounded, and the other end of the inductor L7 is connected with the input end of the filter.

Further, the second filtering module includes inductance L5, electric capacity C77 and electric capacity C78, inductance L5 set up in the wave filter with between the main control module, electric capacity C77's one end connect in inductance L5 with between the one-level filtering unit, electric capacity C78's one end connect in inductance L5 with between the main control module, electric capacity C77's the other end with electric capacity C78's the other end is ground connection respectively.

Further, the main control module comprises a main control chip and a WiFi chip, the WiFi chip is arranged between the main control chip and the second filtering module, and the model of the WiFi chip is RTL8188ETVQFN 46.

Furthermore, the power supply module is used for supplying power to the main control module.

Furthermore, the primary filtering unit is connected with an antenna module for receiving external signals.

The utility model has the advantages that: the utility model discloses a one-level filtering unit, wave filter and second filtering module constitute triple filtering structure, can effectually strain the outband interference noise that external environment brought to effectively reduce the packet error rate, promote wiFi actual data transmission rate and reduce the packet error rate, let the user use and use to have good experience.

Drawings

Fig. 1 is a block diagram of the present invention.

Fig. 2 is a schematic diagram of the first filtering module and the second filtering module of the present invention.

Fig. 3 is a schematic diagram of the WiFi chip and its peripheral circuit of the present invention.

Reference numerals: the antenna comprises a main control module, a first filtering module, a second filtering module, a filter, a first-stage filtering unit, a main control chip, a WiFi chip, a power supply module and an antenna module, wherein the main control module is 1, the first filtering module is 2, the second filtering module is 3, the filter is 4, the first-stage filtering unit is 5, the main control chip is 6, the WiFi chip is 7, the power supply module is 8, and the antenna module is 9.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to fig. 3, the utility model provides a pair of an anti-interference filter circuit for wireless reception, including host system 1, first filter module 2 and second filter module 3, second filter module 3 sets up in between first filter module 2 and host system 1, first filter module 2 includes filter 4 and one-level filter unit 5, filter 4 is used for receiving external signal, one-level filter unit 5 sets up in the input of filter 4;

the frequencies of the noise filtered by the filter 4, the first-stage filtering unit 5 and the second filtering module 3 are different from each other.

The utility model discloses a one-level filtering unit 5, wave filter 4 and second filtering module 3 constitute triple filtering structure, promptly when received signal, carry out primary filtering by one-level filtering unit 5, carry out secondary filtering by wave filter 4, carry out tertiary filtering by second filtering module 3 again, the outband interference noise that external environment brought can effectually be strained in the three cooperation to effectively reduce the packet error rate, promote wiFi actual data transmission rate and reduce the packet error rate, let the user use and use have good experience.

In this embodiment, the model of the filter 4 is LFB212G45SG8a166, the fourth pin of the filter 4 is connected to the first-stage filtering unit 5, the second pin of the filter 4 is connected to the second filtering module 3, and both the first pin and the third pin of the filter 4 are grounded. The filter 4 is a band-pass filter 4, which is used to pass the signal with specific frequency and block the noise with non-specific frequency, so as to achieve the filtering effect.

In this embodiment, the primary filter unit 5 includes an inductor L7 and a capacitor C80, and after the inductor L7 and the capacitor C80 are connected in series, one end is grounded, and the other end is connected to the input end of the filter 4. Constitute one-level parallel connection ware through inductance L7 and electric capacity C80 for carry out the first time filtration to the signal received to can be more stable and accurate when letting the signal that can pass through let subsequent filter 4 and second filter module 3 filter.

In this embodiment, the second filtering module 3 includes an inductor L5, a capacitor C77, and a capacitor C78, the inductor L5 is disposed between the filter 4 and the main control module 1, one end of the capacitor C77 is connected between the inductor L5 and the first-stage filtering unit 5, one end of the capacitor C78 is connected between the inductor L5 and the main control module 1, and the other end of the capacitor C77 and the other end of the capacitor C78 are grounded, respectively.

Namely the utility model discloses an inductance L5, electric capacity C77 and electric capacity C78 constitute second grade pi type ware, carry out the higher filtration of precision to the signal after filtering the chip filtering of filtering to further reduce the noise in the signal, make the signal precision that gets into host system 1 higher, in order to promote host system 1's throughput.

To sum up, when in actual use, the signal frequency channel of one-level filtering unit 5 is A, and the signal frequency channel of filtering chip is B, and the signal frequency channel of second filtering module 3 is C, and C is B's proper subset, and B is A's proper subset, thereby lets the utility model discloses have triple filter effect, can effectively promote filterable effect through progressively filtering to transmission efficiency has been guaranteed.

In this embodiment, the main control module 1 includes a main control chip 6 and a WiFi chip 7, the WiFi chip 7 is disposed between the main control chip 6 and the second filtering module 3, and the model of the WiFi chip 7 is RTL8188ETVQFN 46.

Namely, after the WiFi chip 7 receives the filtered signal, the signal is processed so that the main control chip 6 can recognize the signal, and then the signal is transmitted to the main control chip 6, so that the main control chip 6 performs the next step according to the signal, thereby completing the process of signal transmission. Specifically, the main control chip 6 is a conventional chip, which may be different according to the electronic device in practical application, and is not described herein again.

In this embodiment, the utility model discloses still include power module 8, power module 8 is used for doing the power supply of host system 1. The power module 8 can have various implementation modes according to actual needs, for example, when the device of the utility model is a mobile terminal such as a mobile phone, the power module 8 is a battery and a corresponding peripheral circuit inside the device; and when using the utility model discloses a when equipment is fixed equipment such as router, then power module 8 is the step-down module for connect the commercial power and will press the voltage that fixed equipment can use to the commercial power.

In this embodiment, the first-stage filtering unit 5 is connected to an antenna module 9 for receiving external signals. Antenna module 9 be conventional part, belong to the product that technical staff in the field can directly learn for received signal uses.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.

Claims

1. An antijam filter circuit for wireless reception, comprising: the filter comprises a main control module, a first filtering module and a second filtering module, wherein the second filtering module is arranged between the first filtering module and the main control module, the first filtering module comprises a filter and a first-stage filtering unit, the filter is used for receiving external signals, and the first-stage filtering unit is arranged at the input end of the filter;

2. The antijam filter circuit for wireless reception of claim 1, wherein: the model of the filter is LFB212G45SG8A166, a fourth pin of the filter is connected with the first-stage filtering unit, a second pin of the filter is connected with the second filtering module, and a first pin and a third pin of the filter are both grounded.

3. The antijam filter circuit for wireless reception of claim 1, wherein: the primary filtering unit comprises an inductor L7 and a capacitor C80, one end of the inductor L7 is grounded after the inductor L3526 and the capacitor C80 are connected in series, and the other end of the inductor L3526 is connected to the input end of the filter.

4. The antijam filter circuit for wireless reception of claim 1, wherein: the second filtering module comprises an inductor L5, a capacitor C77 and a capacitor C78, wherein the inductor L5 is arranged between the filter and the main control module, one end of the capacitor C77 is connected between the inductor L5 and the primary filtering unit, one end of the capacitor C78 is connected between the inductor L5 and the main control module, and the other end of the capacitor C77 is grounded with the other end of the capacitor C78.

5. The antijam filter circuit for wireless reception of claim 1, wherein: the main control module comprises a main control chip and a WiFi chip, the WiFi chip is arranged between the main control chip and the second filtering module, and the type of the WiFi chip is RTL8188ETVQFN 46.

6. The antijam filter circuit for wireless reception of claim 1, wherein: the power supply module is used for supplying power to the main control module.

7. The antijam filter circuit for wireless reception of claim 1, wherein: the primary filtering unit is connected with an antenna module for receiving external signals.