CN107534423A - A kind of method and device for suppressing interference signal - Google Patents

A kind of method and device for suppressing interference signal Download PDF

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Publication number
CN107534423A
CN107534423A CN201680008258.3A CN201680008258A CN107534423A CN 107534423 A CN107534423 A CN 107534423A CN 201680008258 A CN201680008258 A CN 201680008258A CN 107534423 A CN107534423 A CN 107534423A
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CN
China
Prior art keywords
frequency
network
interference signal
low
series
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CN201680008258.3A
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Chinese (zh)
Inventor
郭群
隆仲莹
安万吉
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2016/078107 priority Critical patent/WO2017166199A1/en
Publication of CN107534423A publication Critical patent/CN107534423A/en

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    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00Multiple-port networks comprising only passive electrical elements as network components

Abstract

A kind of method and device for suppressing interference signal, can be by adjusting the component in LC networks, while suppresses high-frequency interferencing signal and low-frequency interference signal.This method includes:Detect the radiation (101) that whether there is interference signal on device;If so, the interference signal is inputted into LC networks, wherein, the input of the LC networks is connected with the device, the output head grounding (102) of the LC networks;Component in the LC networks is adjusted according to the frequency of the interference signal got, to suppress the interference signal (103).

Description

Method and device for suppressing interference signal Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for suppressing interference information.

Background

In the process of designing a data communication product, it is necessary to comprehensively consider the radiation of an interference signal on a device of the data communication product, for example, consider whether the metal card socket of a certain device has the radiation of the interference signal, where the radiation capability in different frequency ranges is related to whether the metal card socket is grounded. If the metal card seat is grounded, the interference suppression in a high-frequency range is very obvious, but the interference in a low-frequency range is rapidly deteriorated; if the metal card holder is not grounded, the interference in the high frequency range is rapidly deteriorated, but the interference suppression in the low frequency range is very significant.

The current scheme is as follows: grounding the metal card holder with the radiation of the interference signal; or not to a metal card holder where there is radiation of interfering signals.

Since the metal card holder is grounded in all frequency ranges or the metal card holder is not grounded in all frequency ranges, it does not have a frequency selective characteristic, and further, when the metal card holder is grounded, interference in a low frequency range is rapidly deteriorated, so that a low frequency interference signal cannot be suppressed; when the metal card holder is not grounded, the interference in the high frequency range is rapidly deteriorated, so that the high frequency interference signal cannot be suppressed. Therefore, the high-frequency interference signal and the low-frequency interference signal cannot be suppressed at the same time.

Disclosure of Invention

The embodiment of the invention provides a method and a device for inhibiting interference signals, which can inhibit high-frequency interference signals and low-frequency interference signals at the same time by adjusting components in an LC network.

In view of the above, a first aspect of the present invention provides a method for suppressing an interference signal, including:

in the process of designing a style of data communication products, detecting whether the radiation of interference signals exists on a device;

if so, inputting the interference signal into an LC network, wherein the input end of the LC network is connected with the device, and the output end of the LC network is grounded;

and adjusting components in the LC network according to the acquired frequency of the interference signal so as to suppress the interference signal.

The interference signal comprises a clock signal, the device comprises a metal card seat, interference signal radiation exists on the metal card seat, the LC network comprises a parallel LC network, a series LC network, a first-order LC network or a multi-order LC network, components in the LC network comprise inductors and capacitors, the number of the inductors and the capacitors can be correspondingly adjusted according to the frequency of the interference signal, and the output end of the LC network is grounded and can be mainly connected with the output end of the LC network through a printed circuit board.

The beneficial effects are as follows: the LC network generates resonance on a certain frequency band by adjusting components in the LC network, and the LC network presents 0 impedance to the outside or infinite impedance to the outside when resonating, which is equivalent to grounding and ungrounded, so that the device can be grounded in a high-frequency range and ungrounded in a low-frequency range by reasonable adjustment, and therefore, the frequency selection characteristic is provided when the device is grounded, and high-frequency interference signals and low-frequency interference signals are inhibited.

In combination with the first aspect of the present invention, a first embodiment of the first aspect of the present invention includes:

the inputting the interference signal into the LC network includes:

inputting the interference signal into a parallel LC network;

the adjusting the components in the LC network according to the acquired frequency of the interference signal includes:

acquiring the frequency of a low-frequency interference signal in the interference signal;

adjusting components in the parallel LC network according to the frequency of the low-frequency interference signal so that the resonant frequency of the parallel LC network matches the frequency of the low-frequency interference signal.

The frequency matching between the resonant frequency of the parallel LC network and the low-frequency interference signal may be: the resonant frequency of the parallel LC network is the same as a specific frequency of all the frequencies of the low-frequency interference signals, and under the condition that the resonant frequency is equal to the specific frequency, the parallel LC network can provide a significant isolation, for example, 10 to 20dB, on all the frequencies of the low-frequency interference signals, so that a high impedance is formed on all the frequencies of the low-frequency interference signals, which is equivalent to no ground, so that all the low-frequency interference signals can be suppressed, and in addition, a small isolation, for example, 1 to 2dB, is provided on the frequencies of the high-frequency interference signals, so that a low impedance is formed on all the frequencies of the high-frequency interference signals, which is equivalent to ground, so that all the high-frequency interference signals can be suppressed. Obviously, the purpose of simultaneously suppressing the high-frequency interference signal and the low-frequency interference signal is achieved.

In combination with the first aspect of the present invention, a second embodiment of the first aspect of the present invention includes:

the inputting the interference signal into the LC network includes:

inputting the interference signal into a series LC network;

the adjusting the components in the LC network according to the acquired frequency of the interference signal includes:

acquiring the frequency of a high-frequency interference signal in the interference signals;

adjusting components in the series LC network according to the frequency of the high-frequency interference signal so that the resonant frequency of the series LC network matches the frequency of the high-frequency interference signal.

The matching between the resonant frequency of the series LC network and the frequency of the high-frequency interference signal may be: the resonant frequency of the series LC network is the same as a specific frequency of all the frequencies of the high-frequency interference signals, and under the condition that the resonant frequency is equal to the specific frequency, the series LC network can provide a small isolation, for example, 1 to 2dB, at all the frequencies of the high-frequency interference signals, so that a low impedance is formed at all the frequencies of the high-frequency interference signals, which is equivalent to ground, so that all the high-frequency interference signals can be suppressed, and in addition, a significant isolation, for example, 10 to 20dB, is provided at the frequencies of the low-frequency interference signals, so that a high impedance is formed at all the frequencies of the low-frequency interference signals, which is equivalent to ungrounded, so that all the low-frequency interference signals can be suppressed. Obviously, the purpose of simultaneously suppressing the high-frequency interference signal and the low-frequency interference signal is achieved.

In combination with the first aspect of the present invention, a third embodiment of the first aspect of the present invention includes:

the LC network mounts the device on a printed circuit board; or, the LC network is implemented by an internal wiring form of the printed circuit board.

With reference to the first embodiment of the first aspect of the present invention, the second embodiment of the first aspect of the present invention, the third embodiment of the first aspect of the present invention, and the fourth embodiment of the first aspect of the present invention include:

the resonance frequency f is calculated by the following formula0

Where l represents inductance and c represents capacitance.

In practical application, the resonant frequency of the parallel LC network and the resonant frequency of the series LC network can be calculated by the above calculation formula, and different l and c can be selected for adjustment.

With reference to the first aspect of the present invention, a fifth embodiment of the first aspect of the present invention includes:

the LC network comprises a parallel LC network, a series LC network, a first-order LC network or a multi-order LC network.

In view of the above, the second aspect of the present invention provides an apparatus for suppressing an interference signal, comprising:

the detection module is used for detecting whether the radiation of the interference signal exists on the device;

the input module is used for inputting the interference signal into an LC network if the detection module detects that the radiation of the interference signal exists on the device, wherein the input end of the LC network is connected with the device, and the output end of the LC network is grounded;

and the adjusting module is used for adjusting the components in the LC network according to the acquired frequency of the interference signal so as to suppress the interference signal.

The interference signal comprises a clock signal, the device comprises a metal card seat, interference signal radiation exists on the metal card seat, the LC network comprises a parallel LC network, a series LC network, a first-order LC network or a multi-order LC network, components in the LC network comprise inductors and capacitors, and the number of the inductors and the capacitors can be correspondingly adjusted according to the frequency of the interference signal.

The beneficial effects are as follows: the LC network generates resonance on a certain frequency band by adjusting components in the LC network, and the LC network presents 0 impedance to the outside or infinite impedance to the outside when resonating, which is equivalent to grounding and ungrounded, so that the device can be grounded in a high-frequency range and ungrounded in a low-frequency range by reasonable adjustment, and therefore, the frequency selection characteristic is provided when the device is grounded, and high-frequency interference signals and low-frequency interference signals are inhibited.

In combination with the second aspect of the present invention, a first embodiment of the second aspect of the present invention includes:

the input module is specifically used for inputting the interference signal into a parallel LC network;

the device further comprises:

the first acquisition module is used for acquiring the frequency of a low-frequency interference signal in the interference signals;

the adjusting module is specifically configured to adjust components in the parallel LC network according to the frequency of the low-frequency interference signal acquired by the first acquiring module, so that the resonant frequency of the parallel LC network is matched with the frequency of the low-frequency interference signal.

The adjusting module enables the resonant frequency of the parallel LC network to be matched with the frequency of the low-frequency interference signal by adjusting components in the parallel LC network, so that as long as reasonable adjustment is carried out, the parallel LC network can provide obvious isolation degree on the frequency of all the low-frequency interference signals, high impedance is formed on the frequency of all the low-frequency interference signals, the isolation is equivalent to ungrounded ground, all the low-frequency interference signals can be restrained, in addition, small isolation degree is provided on the frequency of the high-frequency interference signals, low impedance is formed on the frequency of all the high-frequency interference signals, the isolation is equivalent to grounded ground, and all the high-frequency interference signals can be restrained. Obviously, the purpose of simultaneously suppressing the high-frequency interference signal and the low-frequency interference signal is achieved. Therefore, the present invention has a frequency selective characteristic at the time of grounding, and suppresses a high-frequency interference signal and a low-frequency interference signal.

In combination with the second aspect of the present invention, a second embodiment of the second aspect of the present invention includes:

the input module is specifically used for inputting the interference signal into a series LC network;

the device further comprises:

the second acquisition module is used for acquiring the frequency of a high-frequency interference signal in the interference signals;

the adjusting module is specifically configured to adjust components in the series LC network according to the frequency of the high-frequency interference signal acquired by the second acquiring module, so that the resonant frequency of the series LC network matches the frequency of the high-frequency interference signal.

The adjusting module enables the resonant frequency of the series LC network to be matched with the frequency of the high-frequency interference signal by adjusting components in the series LC network, so as long as reasonable adjustment is carried out, the series LC network can provide small isolation degree on the frequency of all the high-frequency interference signals, low impedance is formed on the frequency of all the high-frequency interference signals and is equivalent to grounding, all the high-frequency interference signals can be restrained, in addition, obvious isolation degree is provided on the frequency of the low-frequency interference signals, high impedance is formed on the frequency of all the low-frequency interference signals, and the low-frequency interference signals are equivalent to ungrounded, and all the low-frequency interference signals can be restrained. Therefore, the present invention has a frequency selective characteristic at the time of grounding, and suppresses a high-frequency interference signal and a low-frequency interference signal.

In combination with the second aspect of the present invention, a third embodiment of the second aspect of the present invention includes:

the LC network mounts the device on a printed circuit board; or, the LC network is implemented by an internal wiring form of the printed circuit board.

With reference to the first embodiment of the second aspect of the present invention, the second embodiment of the second aspect of the present invention, the third embodiment of the second aspect of the present invention, and the fourth embodiment of the second aspect of the present invention include:

the resonance frequency f is calculated by the following formula0

Where l represents inductance and c represents capacitance.

In practical application, the resonant frequency of the parallel LC network and the resonant frequency of the series LC network can be calculated by the above calculation formula, and different l and c can be selected for adjustment.

In combination with the second aspect of the present invention, a fifth embodiment of the second aspect of the present invention includes:

the LC network comprises a parallel LC network, a series LC network, a first-order LC network or a multi-order LC network.

Compared with the prior art, the LC network generates resonance in a certain frequency band by adjusting the components in the LC network, and the LC network presents 0 impedance outwards or infinite impedance outwards when resonating, which is equivalent to grounding and ungrounded, so that the device can be grounded in a high-frequency range and ungrounded in a low-frequency range by reasonable adjustment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is a diagram illustrating an embodiment of a method for suppressing an interference signal according to an embodiment of the present invention;

FIG. 2 is a diagram of another embodiment of a method for suppressing an interference signal according to an embodiment of the present invention;

FIG. 3 is a diagram of another embodiment of a method for suppressing an interference signal according to an embodiment of the present invention;

FIG. 4 is a diagram of an embodiment of an apparatus for suppressing an interference signal according to an embodiment of the present invention;

FIG. 5 is a diagram of another embodiment of an apparatus for suppressing an interference signal according to an embodiment of the present invention;

FIG. 6 is a diagram of another embodiment of an apparatus for suppressing an interference signal according to an embodiment of the present invention;

fig. 7 is a schematic diagram of an embodiment of a server according to the present invention.

Detailed Description

The embodiment of the invention provides a method and a device for inhibiting interference signals, which can inhibit high-frequency interference signals and low-frequency interference signals at the same time by adjusting components in an LC network.

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The method for suppressing interference signals in the present invention is described with reference to the following embodiments:

referring to fig. 1, an embodiment of a method for suppressing an interference signal according to an embodiment of the present invention includes:

101. detecting whether there is radiation of an interference signal on the device;

in this embodiment, the interference signal includes a clock signal, the device includes a metal Card socket, radiation of the interference signal exists on the metal Card socket, the metal Card socket includes a Subscriber Identity Module (SIM) Card socket or a Secure Digital Card (SD) Card socket, and the metal Card socket further includes other types of Card sockets, which are not limited herein.

102. If so, inputting the interference signal into an LC network, wherein the input end of the LC network is connected with the device, and the output end of the LC network is grounded;

in this embodiment, if radiation of an interference signal is detected to exist on a device, the interference signal is input to an LC network, where an input end of the LC network is connected to the device, and an output end of the LC network is grounded, and specifically, the output end of the LC network may be mainly connected to a printed circuit board on which the device is located.

It should be noted that in an actual Circuit, the Pin network of the device ground and the Printed Circuit Board (PCB) are mainly connected through an LC network, and in some embodiments of the present invention, the LC network includes a parallel LC network, a serial LC network, a first-order LC network, or a multi-order LC network.

103. And adjusting components in the LC network according to the acquired frequency of the interference signal so as to suppress the interference signal.

In this embodiment, after the interference signal is input into the LC network, the frequency of the interference signal is obtained, and the components in the LC network are adjusted according to the frequency of the interference signal to suppress the interference signal.

It should be noted that the components in the LC network include inductors and capacitors, and the number of the inductors and capacitors can be adjusted according to the frequency of the interference signal.

In this embodiment, the LC network resonates at a certain frequency band by adjusting components in the LC network, and since the LC network resonates while presenting an impedance of 0 to the outside or an impedance to the outside that is infinite, which is equivalent to grounding and ungrounded, the device can be grounded in a high frequency range and ungrounded in a low frequency range by only reasonable adjustment.

Referring to fig. 2, another embodiment of the method for suppressing an interference signal according to the embodiment of the present invention includes:

201. detecting whether there is radiation of an interference signal on the device;

in this embodiment, step 201 is similar to step 101, and is not described herein again.

202. If so, inputting the interference signal into a parallel LC network, wherein the input end of the parallel LC network is connected with the device, and the output end of the parallel LC network is grounded;

in this embodiment, if it is detected that there is radiation of an interference signal on the device, the interference signal is input to the parallel LC network, where an input end of the parallel LC network is connected to the device, and an output end of the parallel LC network is mainly connected to the printed circuit board on which the device is located.

203. Acquiring the frequency of a low-frequency interference signal in the interference signal;

in this embodiment, after the interference signal is input to the parallel LC network, the frequency of the low-frequency interference signal in the interference signal is obtained.

204. And adjusting components in the parallel LC network according to the frequency of the low-frequency interference signal, so that the resonant frequency of the parallel LC network is matched with the frequency of the low-frequency interference signal, and the interference signal is suppressed.

In this embodiment, in practical applications, for example, in a mobile communication system, the low frequency range is 698-960MHz, the high frequency range is 1710-2700MHz, the frequency of the low frequency interference signal is in the low frequency range, and the frequency of the high frequency interference signal in the interference signal is in the high frequency range. The matching of the resonant frequency of the parallel LC network and the frequency of the low-frequency interference signal may be: the resonant frequency of the parallel LC network is the same as a specific frequency of all the frequencies of the low-frequency interference signals, and under the condition that the resonant frequency is equal to the specific frequency, the parallel LC network can provide a significant isolation, for example, 10 to 20dB, on all the frequencies of the low-frequency interference signals, so that a high impedance is formed on all the frequencies of the low-frequency interference signals, which is equivalent to no ground, so that all the low-frequency interference signals can be suppressed, and in addition, a small isolation, for example, 1 to 2dB, is provided on the frequencies of the high-frequency interference signals, so that a low impedance is formed on all the frequencies of the high-frequency interference signals, which is equivalent to ground, so that all the high-frequency interference signals can be suppressed. Obviously, the purpose of simultaneously suppressing the high-frequency interference signal and the low-frequency interference signal is achieved.

It should be noted that, in step 204, the resonance characteristic of the parallel LC network is mainly used, and the resonance characteristic of the parallel LC network is as follows: if the parallel LC network is composed of an inductor and a capacitor, when the resonance frequency is equal to the external frequency, the impedance of the parallel LC network is pure resistance and has the maximum value, when the resonance frequency is lower than the external frequency, the impedance of the parallel LC network is capacitive, which is equivalent to a capacitor, and when the resonance frequency is higher than the external frequency, the impedance of the parallel LC network is inductive, which is equivalent to an inductor coil.

The resonant frequency f of the LC network0Calculated by the following formula:

where l represents the inductance in the LC network and c represents the capacitance in the LC network.

In practical application, the resonant frequency of the parallel LC network can be calculated by the above calculation formula, and different l and c can be selected for adjustment.

In this embodiment, the resonant frequency of the parallel LC network is matched with the frequency of the low-frequency interference signal by adjusting components in the parallel LC network, so as long as reasonable adjustment is performed, the parallel LC network can provide an obvious isolation degree at the frequencies of all the low-frequency interference signals, so that a high impedance is formed at the frequencies of all the low-frequency interference signals, which is equivalent to no ground, so that all the low-frequency interference signals can be suppressed, and in addition, a small isolation degree is provided at the frequencies of the high-frequency interference signals, so that a low impedance is formed at the frequencies of all the high-frequency interference signals, which is equivalent to ground, so that all the high-frequency interference signals can be suppressed. Obviously, the purpose of simultaneously suppressing the high-frequency interference signal and the low-frequency interference signal is achieved. Therefore, the present invention has a frequency selective characteristic at the time of grounding, and suppresses a high-frequency interference signal and a low-frequency interference signal.

It should be noted that, in practical applications, a series LC network may also be used, and the following description is given with reference to specific embodiments:

referring to fig. 3, another embodiment of the method for suppressing an interference signal according to the embodiment of the present invention includes:

301. detecting whether there is radiation of an interference signal on the device;

in this embodiment, step 301 is similar to step 101, and is not described herein again.

302. If so, inputting the interference signal into a series LC network, wherein the input end of the series LC network is connected with the device, and the output end of the series LC network is grounded;

in this embodiment, if the radiation of the interference signal is detected to exist on the device, the interference signal is input into the series LC network, wherein the input end of the series LC network is connected to the device, and the output end of the series LC network is mainly connected to the printed circuit board on which the device is located.

303. Acquiring the frequency of a high-frequency interference signal in the interference signal;

in this embodiment, after the interference signal is input to the series LC network, the frequency of the high-frequency interference signal in the interference signal is obtained.

304. And adjusting components in the series LC network according to the frequency of the high-frequency interference signal, so that the resonant frequency of the series LC network is matched with the frequency of the high-frequency interference signal, and the interference signal is suppressed.

In this embodiment, in practical applications, for example, in a mobile communication system, the low frequency range is 698-960MHz, the high frequency range is 1710-2700MHz, the frequency of the low frequency interference signal is in the low frequency range, and the frequency of the high frequency interference signal in the interference signal is in the high frequency range. The matching of the resonant frequency of the series LC network to the frequency of the high frequency interference signal may be: the resonant frequency of the series LC network is the same as a specific frequency of all the frequencies of the high-frequency interference signals, and under the condition that the resonant frequency is equal to the specific frequency, the series LC network can provide a small isolation, for example, 1 to 2dB, at all the frequencies of the high-frequency interference signals, so that a low impedance is formed at all the frequencies of the high-frequency interference signals, which is equivalent to ground, so that all the high-frequency interference signals can be suppressed, and in addition, a significant isolation, for example, 10 to 20dB, is provided at the frequencies of the low-frequency interference signals, so that a high impedance is formed at all the frequencies of the low-frequency interference signals, which is equivalent to ungrounded, so that all the low-frequency interference signals can be suppressed. Obviously, the purpose of simultaneously suppressing the high-frequency interference signal and the low-frequency interference signal is achieved.

It should be noted that, in the above step 304, the resonance characteristic of the series LC network is mainly used, and the resonance characteristic of the series LC network is as follows: if the series LC network is composed of an inductor and a capacitor, the impedance of the series LC network is purely resistive and has a minimum value when the resonance frequency is equal to the applied frequency, the impedance of the series LC network is inductive, corresponding to an inductor coil, when the resonance frequency is lower than the applied frequency, and the impedance of the series LC network is capacitive, corresponding to a capacitor, when the resonance frequency is higher than the applied frequency.

The resonant frequency f of the LC network0Calculated by the following formula:

where l represents the inductance in the LC network and c represents the capacitance in the LC network.

In practical application, the resonant frequency of the series LC network can be calculated by the above calculation formula, and different l and c can be selected for adjustment.

In this embodiment, by adjusting components in the series LC network, the resonant frequency of the series LC network is matched with the frequency of the high-frequency interference signal, so as long as reasonable adjustment is performed, the series LC network can provide a small isolation degree at the frequencies of all the high-frequency interference signals, so that a low impedance is formed at the frequencies of all the high-frequency interference signals, which is equivalent to grounding, so that all the high-frequency interference signals can be suppressed, and in addition, an obvious isolation degree is provided at the frequencies of the low-frequency interference signals, so that a high impedance is formed at the frequencies of all the low-frequency interference signals, which is equivalent to ungrounded, so that all the low-frequency interference signals can be suppressed. Therefore, the present invention has a frequency selective characteristic at the time of grounding, and suppresses a high-frequency interference signal and a low-frequency interference signal.

It should be noted that, in practical applications, the LC network may also be implemented by attaching an LC device on a PCB motherboard, or implemented in a PCB motherboard internal routing manner, where the LC network implemented in the PCB motherboard internal routing manner can effectively save the layout space of the PCB.

In practical application, The inventor finds that The Total Isotropic Sensitivity (Total Isotropic Sensitivity, english abbreviation: TIS) of wireless Over-The-Air (english full: Over The Air, english abbreviation: OTA) performance is improved by about 10dB in a test of wireless performance of a certain data communication product, and The effect is remarkable, and can be specifically seen in The following table:

as can be seen from the above table, the present invention can effectively suppress high-frequency interference signals and low-frequency interference signals.

Referring to fig. 4, an embodiment of an apparatus for suppressing an interference signal according to an embodiment of the present invention includes:

a detection module 401, configured to detect whether there is radiation of an interference signal on a device;

an input module 402, configured to input an interference signal into an LC network if the detection module 401 detects that radiation of the interference signal exists on the device, where an input end of the LC network is connected to the device, and an output end of the LC network is grounded;

an adjusting module 403, configured to adjust a component in the LC network according to the obtained frequency of the interference signal, so as to suppress the interference signal.

In this embodiment, the adjusting module 403 makes the LC network resonate in a certain frequency band by adjusting components in the LC network, and since the LC network resonates while presenting 0 impedance to the outside or infinite impedance to the outside, which is equivalent to grounding and ungrounded, the device can be grounded in a high frequency range and ungrounded in a low frequency range as long as it is reasonably adjusted, so that the device has a frequency selection characteristic while being grounded, and simultaneously suppresses high frequency interference signals and low frequency interference signals.

Optionally, in some embodiments of the present invention, the LC network includes a parallel LC network, a series LC network, a first order LC network, or a multi-order LC network.

Referring to fig. 5, another embodiment of the apparatus for suppressing an interference signal according to the embodiment of the present invention includes:

a detection module 501, configured to detect whether there is radiation of an interference signal on a device;

an input module 502, configured to input an interference signal into the parallel LC network if the detection module 501 detects that radiation of the interference signal exists on the device, where an input end of the parallel LC network is connected to the device, and an output end of the parallel LC network is grounded;

a first obtaining module 503, configured to obtain a frequency of a low-frequency interference signal in the interference signal;

an adjusting module 504, configured to adjust components in the parallel LC network according to the frequency of the low-frequency interference signal, so that the resonant frequency of the parallel LC network matches the frequency of the low-frequency interference signal, so as to suppress the interference signal.

Alternatively, the resonance frequency f is calculated by the following formula0

Where l represents inductance and c represents capacitance.

In practical application, the resonant frequency of the parallel LC network can be calculated by the above calculation formula, and different l and c can be selected for adjustment.

In this embodiment, the adjusting module 504 adjusts the components in the parallel LC network to match the resonant frequency of the parallel LC network with the frequency of the low-frequency interference signal, so as long as reasonable adjustment is performed, the parallel LC network can provide significant isolation at the frequency of all the low-frequency interference signals, so that high impedance is formed at the frequency of all the low-frequency interference signals, which is equivalent to no ground, so that all the low-frequency interference signals can be suppressed, and in addition, a small isolation is provided at the frequency of the high-frequency interference signals, so that low impedance is formed at the frequency of all the high-frequency interference signals, which is equivalent to ground, so that all the high-frequency interference signals can be suppressed. Obviously, the purpose of simultaneously suppressing the high-frequency interference signal and the low-frequency interference signal is achieved. Therefore, the present invention has a frequency selective characteristic at the time of grounding, and suppresses a high-frequency interference signal and a low-frequency interference signal.

Referring to fig. 6, another embodiment of the apparatus for suppressing an interference signal according to the embodiment of the present invention includes:

a detection module 601, configured to detect whether there is radiation of an interference signal on a device;

an input module 602, configured to input an interference signal into a series LC network if the detection module 601 detects that radiation of the interference signal exists on the device, where an input end of the series LC network is connected to the device, and an output end of the series LC network is grounded;

a second obtaining module 603, configured to obtain a frequency of a high-frequency interference signal in the interference signal;

an adjusting module 604, configured to adjust components in the series LC network according to a frequency of the high-frequency interference signal, so that a resonant frequency of the series LC network matches a frequency of the high-frequency interference signal, so as to suppress the interference signal.

Alternatively, the resonance frequency f is calculated by the following formula0

Where l represents inductance and c represents capacitance.

In practical application, the resonant frequency of the series LC network can be calculated by the above calculation formula, and different l and c can be selected for adjustment.

In this embodiment, the adjusting module 604 adjusts the components in the series LC network to match the resonant frequency of the series LC network with the frequency of the high-frequency interference signal, so as long as reasonable adjustment is performed, the series LC network can provide a small isolation degree at the frequency of all the high-frequency interference signals, so that a low impedance is formed at the frequency of all the high-frequency interference signals, which is equivalent to grounding, so that all the high-frequency interference signals can be suppressed, and in addition, an obvious isolation degree is provided at the frequency of the low-frequency interference signals, so that a high impedance is formed at the frequency of all the low-frequency interference signals, which is equivalent to ungrounded, so that all the low-frequency interference signals can be suppressed. Therefore, the present invention has a frequency selective characteristic at the time of grounding, and suppresses a high-frequency interference signal and a low-frequency interference signal.

It should be noted that, in practical applications, the LC network may also be implemented by attaching an LC device on a PCB motherboard, or implemented in a PCB motherboard internal routing manner, where the LC network implemented in the PCB motherboard internal routing manner can effectively save the layout space of the PCB.

Referring to fig. 7, an embodiment of the server according to the present invention further provides a server, where:

fig. 7 is a schematic diagram of a server 700 according to an embodiment of the present invention, where the server 700 may have a relatively large difference due to different configurations or performances, and may include one or more Central Processing Units (CPUs) 701 (e.g., one or more processors), one or more storage media 704 (e.g., one or more mass storage devices) storing applications 702 or data 703. Storage medium 704 may be, among other things, transient or persistent storage. The program stored on the storage medium 704 may include one or more modules (not shown), each of which may include a sequence of instruction operations for the switch. Still further, the central processor 701 may be arranged to communicate with the storage medium 704, and execute a series of instruction operations in the storage medium 704 on the server 700.

The server 700 may also include one or more power supplies 705, one or more wired or wireless network interfaces 706, one or more input/output interfaces 707, and/or one or more operating systems 708, such as Windows Server, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, and the like.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (12)

  1. A method for suppressing an interfering signal, the method comprising:
    detecting whether there is radiation of an interference signal on the device;
    if so, inputting the interference signal into an LC network, wherein the input end of the LC network is connected with the device, and the output end of the LC network is grounded;
    and adjusting components in the LC network according to the acquired frequency of the interference signal so as to suppress the interference signal.
  2. The method of claim 1, wherein inputting the interference signal into an LC network comprises:
    inputting the interference signal into a parallel LC network;
    the adjusting the components in the LC network according to the acquired frequency of the interference signal includes:
    acquiring the frequency of a low-frequency interference signal in the interference signal;
    adjusting components in the parallel LC network according to the frequency of the low-frequency interference signal so that the resonant frequency of the parallel LC network matches the frequency of the low-frequency interference signal.
  3. The method of claim 1, wherein inputting the interference signal into an LC network comprises:
    inputting the interference signal into a series LC network;
    the adjusting the components in the LC network according to the acquired frequency of the interference signal includes:
    acquiring the frequency of a high-frequency interference signal in the interference signals;
    adjusting components in the series LC network according to the frequency of the high-frequency interference signal so that the resonant frequency of the series LC network matches the frequency of the high-frequency interference signal.
  4. The method of claim 1, wherein the LC network mounts the device on a printed circuit board; or, the LC network is implemented by an internal wiring form of the printed circuit board.
  5. Method according to any of claims 2 to 4, characterized in that the resonance frequency f is calculated by the following formula0
    Where l represents inductance and c represents capacitance.
  6. The method of claim 1 or 4, wherein the LC network comprises a parallel LC network, a series LC network, a first order LC network, or a multi-order LC network.
  7. An apparatus for suppressing an interfering signal, the apparatus comprising:
    the detection module is used for detecting whether the radiation of the interference signal exists on the device;
    the input module is used for inputting the interference signal into an LC network if the detection module detects that the radiation of the interference signal exists on the device, wherein the input end of the LC network is connected with the device, and the output end of the LC network is grounded;
    and the adjusting module is used for adjusting the components in the LC network according to the acquired frequency of the interference signal so as to suppress the interference signal.
  8. The device according to claim 7, characterized in that the input module is specifically configured to input the interference signal into a parallel LC network;
    the device further comprises:
    the first acquisition module is used for acquiring the frequency of a low-frequency interference signal in the interference signals;
    the adjusting module is specifically configured to adjust components in the parallel LC network according to the frequency of the low-frequency interference signal acquired by the first acquiring module, so that the resonant frequency of the parallel LC network is matched with the frequency of the low-frequency interference signal.
  9. The device according to claim 7, characterized in that the input module is specifically configured to input the interference signal into a series LC network;
    the device further comprises:
    the second acquisition module is used for acquiring the frequency of a high-frequency interference signal in the interference signals;
    the adjusting module is specifically configured to adjust components in the series LC network according to the frequency of the high-frequency interference signal acquired by the second acquiring module, so that the resonant frequency of the series LC network matches the frequency of the high-frequency interference signal.
  10. The apparatus of claim 7, wherein the LC network mounts the device on a printed circuit board; or, the LC network is implemented by an internal wiring form of the printed circuit board.
  11. Device according to any of claims 8 to 10, characterized in that the resonance frequency f is calculated by the following formula0
    Where l represents inductance and c represents capacitance.
  12. The apparatus of claim 7 or 10, wherein the LC network comprises a parallel LC network, a series LC network, a first order LC network, or a multi-order LC network.
CN201680008258.3A 2016-03-31 2016-03-31 A kind of method and device for suppressing interference signal CN107534423A (en)

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