CN212137623U - anti-5G interference filter with amplification function - Google Patents

Abstract

The utility model discloses an anti 5G interference filter of function is enlargied in area, including high pass filter and low pass filter, high pass filter establishes ties with low pass filter, the frequency range that high pass filter can pass through is 950MHz and above, the frequency range that low pass filter can pass through is 1450MHz and below, the circuit that high pass filter and low pass filter constitute still the cooperation is connected with the bypass circuit that leads to the direct current resistance and exchange, still be equipped with the signal amplifier in 950MHz ~ 1450MHz band-pass on the circuit. The utility model discloses install this wave filter additional after low noise variable frequency amplifier to effectively restrain 5G's signal to the interference of satellite C wave band.

Description

anti-5G interference filter with amplification function

Technical Field

The utility model relates to a wave filter specifically is used for anti 5G signal interference.

Background

A large number of 5G base stations are deployed by domestic 5G operators, and the spectrum allocation scheme of the domestic 5G operators shows that one section of 5G spectrum is 3400-3600 MHz, the section of spectrum is very close to the downlink 3700-4200 MHz signal of the current satellite C-band, and the 5G base station signal is far higher than the downlink signal of the satellite C-band, so that adjacent channel interference is easily generated.

The 5G signal is a high-frequency signal, the transmission distance is limited, and the 5G signal adopts a micro-coverage mode, so that the situation that the satellite receiving antenna site is surrounded by the 5G base station cluster is caused.

At present, the 5G utilizes the domestic satellite C wave band to carry out downlink 3625MHz-4200MHz signal transmission industries, including China radio and television, banks, securities, meteorology, water conservancy and military, and if the problem of 5G signal interference is not solved, the major potential safety hazard and huge economic loss are brought to the transmission of broadcasting, television and data in the industries.

The basic coping method for resisting 5G interference adopted at present is mainly to add a filter of C wave band in front of a feed source of a satellite antenna and a low-noise variable frequency amplifier so as to inhibit 5G signals entering the low-noise variable frequency amplifier;

most problems can be solved by using the filter of the C wave band, but in practical application, when the 5G base station is very close to the satellite C wave band antenna, interference signals are very strong, the filter of the C wave band cannot filter the too strong 5G base station signals, at this time, a satellite receiver cannot be locked, the data packet loss rate is very high, the error rate of the signals is also improved, and a large number of mosaics appear on a television picture.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, an object of the present invention is to provide an anti-5G interference filter with an amplification function.

The utility model discloses a following technical scheme realizes:

the utility model provides an anti 5G interference filter of area amplification function which characterized in that: the high-pass filter and the low-pass filter are connected in series, the frequency range of the high-pass filter which can pass through is not less than 950MHz, the frequency range of the low-pass filter which can pass through is not more than 1450MHz, and a signal amplifier within the band pass of 950 MHz-1450 MHz is further arranged on the circuit.

The frequency control principle of the low-pass filter and the high-pass filter is as follows:

in the embodiment of the present invention, the circuit formed by the high-pass filter and the low-pass filter is further connected to a bypass circuit for direct current flowing resistance to alternating current.

In the embodiment of the present invention, an attenuation device for attenuating the radio frequency signal is further disposed between the high pass filter and the low pass filter.

In the embodiment of the present invention, the filter is disposed in a metal casing, the metal casing is provided with a radio frequency interface, the radio frequency interface includes an input interface and an output interface, and the metal casing is further provided with a metal radio frequency isolation net.

In an embodiment of the present invention, the radio frequency interface is an F-head or a BNC-head or an N-head.

In the embodiment of the present invention, the metal shell is further provided with a socket for inserting the attenuation device.

The utility model discloses in embodiment 1, be provided with a set of socket on the metal casing.

The utility model discloses in embodiment 2, be provided with two at least groups sockets on the metal casing.

In the embodiment of the present invention, the metal shell further has a case matching connection.

The utility model discloses an anti 5G interference filter of function is enlargied in area has following beneficial effect:

1. the high-pass filter and the low-pass filter are connected in series, and the radio frequency signals below 950MHz and above 1450MHz are controlled to be attenuated and suppressed, while the 5G signal is between 1550MHz and 1750MHz, so that the filter of the invention can effectively suppress and attenuate the signal intensity of the section, thereby playing a role in resisting 5G interference.

2. Be provided with attenuating device, guaranteed in practical application if the radio frequency signal of conveying is too strong, only need insert corresponding decrement attenuating device can, need not to change the structure or the dismouting equipment of link, strengthened the utility model discloses a flexibility.

3. The metal casing is provided with a set of socket or multiunit socket including multiple embodiment, has strengthened the utility model discloses a variety, the comprehensive cost of wave filter has been practiced thrift to the multiunit socket simultaneously.

4. The signals outside the 950 MHz-1450 MHz band pass are restrained, meanwhile, some loss is brought to the signals inside the 950 MHz-1450 MHz band pass, and the signal quality can be increased while the signals are compensated through the signal amplifier inside the 950 MHz-1450 MHz band pass.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described 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 that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an exploded view of the present invention.

Fig. 2 is a schematic view of an application scenario 1 of the present invention.

Fig. 3 is a schematic view of an application scenario 2 of the present invention.

Fig. 4 is a schematic diagram 1 of the present invention.

Fig. 5 is a schematic diagram of the present invention 2.

Fig. 6 is a schematic view of embodiment 1 of the present invention.

Fig. 7 is a schematic view of embodiment 2 of the present invention.

Fig. 8 is a signal schematic diagram 3 of the present invention.

In the figure: 10-a metal housing; 11-a body; 12-a cover plate; 20-a radio frequency interface; 21-an input interface; 22-an output interface; 30-a metal radio frequency isolation net; 40-a socket; 50-attenuation means.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to the attached drawings of the specification, an anti-5G interference filter with an amplification function comprises a high-pass filter and a low-pass filter, the high-pass filter is connected with the low-pass filter in series, the frequency range of the high-pass filter which can pass through the high-pass filter is 950MHz or more, the low-pass filter, which is able to pass frequencies in the range of 1450MHz and below, is arranged in series with the high-pass filter in order, when the 5G base station is close to the satellite C-band antenna, the interference signal is particularly strong, the C-band filter in the prior art can not filter the too strong 5G base station signal, at this time, the satellite receiver cannot be locked, the packet loss rate of data is high, the error rate of signals is also improved, a large amount of mosaics appear on a television picture, the object of the present application is therefore to solve this particular case, in particular by adding a filter specific to the present application against 5G signal interference, after the low noise variable frequency amplifier.

The principle is that the filter is a frequency-selecting device formed by a discrete or equivalent capacitance-inductance combined circuit. By utilizing the characteristics of high frequency resistance and low frequency resistance of the capacitor and low frequency resistance and high frequency resistance of the inductor, and the characteristics of the LC parallel resonance reactance being maximum and the LC series resonance reactance being minimum, the impedance of the combination of the capacitor and the inductor which are applied and combined in series, parallel or series-parallel connection with different values can also change along with different signal frequencies. Different filter circuits may exhibit little or significant reactance to certain frequency signals. When their combination exhibits a high impedance above a certain frequency (f2), the signal above that frequency will be blocked from passing through, while the signal below that frequency can pass through without or with low loss, which serves to select and filter out the signal at that frequency, and this is a combination called a low pass filter with a pass band of 0-f 2. When their combination exhibits a high impedance below a certain frequency (f2), signals above that frequency will block them from passing, while signals above a certain frequency may pass through without or with low loss, serving to select and filter signals at a certain frequency. This is a class combination called high pass filter passband f1 ∞. When the high pass f1 is smaller than the low pass f2, the pass bands of the high pass f1 and the low pass f2 are connected in series and are f 1-f 2.

In the application, f1 is 950MHz, and f2 is 1450 MHz.

Because the frequency of the 5G signal (3400MHz-3600MHz) is converted into 1550MHz-1750MHz bandwidth after passing through the low-noise frequency conversion amplifier, the filter specially used for resisting the 5G signal interference mainly inhibits the 1550MHz-1750MHz frequency band, thereby effectively inhibiting the interference of the 5G signal to the satellite C wave band; in the suppression process, signals in the 950 MHz-1450 MHz band pass also have some loss, in order to overcome the defect, a signal amplifier in the 950 MHz-1450 MHz band pass is also arranged on the circuit, and the signal quality can be increased while compensating the signals through the signal amplifier in the 950 MHz-1450 MHz band pass; the specific signal is lost after passing through a high-pass filter and a low-pass filter, and the signal in the 950 MHz-1450 MHz section is recovered and enhanced through a signal amplifier. The schematic diagram is shown in figure 8 with reference to the specification.

Furthermore, a bypass circuit with direct current resistance and alternating current is also connected to a circuit formed by the high-pass filter and the low-pass filter in a matching manner, the purpose of the bypass circuit is to provide power feeding, and a schematic diagram of the bypass circuit is shown in the attached figure 4 of the specification.

Further, an attenuation device for attenuating radio frequency signals is further arranged between the high-pass filter and the low-pass filter, the attenuation device is arranged to solve the problem that the transmitted RF signals are too strong in practical application to cause the link requirements not to be met, more specifically, a socket for plugging the attenuation device is arranged on the anti-5G interference filter with the amplification function, and in preferred embodiment 1, a group of sockets is arranged on the anti-5G interference filter with the amplification function. In the preferred embodiment 2, at least two sets of sockets are arranged on the anti-5G interference filter with the amplification function. When the user adjusts the level, the user only needs to insert the attenuation device with the required corresponding attenuation amount without changing the structure of a link or disassembling and assembling equipment, and the principle diagram of the filter with the attenuation function special for resisting the 5G signal interference is shown in the attached figure 5 of the specification.

Further, the filter specially used for resisting 5G signal interference is disposed in a metal housing 10, the metal housing 10 includes a body 11 and a cover plate 12, the metal housing 10 is provided with a radio frequency interface 20, the radio frequency interface 20 includes an input interface 21 and an output interface 22, the metal housing 10 is further provided with a metal radio frequency isolation net 30 therein, more specifically, the radio frequency interface 20 is an F-head, a BNC-head or an N-head, and the metal housing 10 is further provided with a socket 40 for inserting an attenuation device 50.

In the use, the utility model discloses a be exclusively used in anti 5G signal interference's wave filter can carry out the independent utility as an solitary module, also can install at supporting quick-witted incasement, is convenient for install and maintain. In the preferred embodiment of the present invention, the filter dedicated to 5G signal interference resistance adopts a set of socket design and a three-set of socket design, as shown in the accompanying fig. 6 and 7 of the specification.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims (8)

1. The utility model provides an anti 5G interference filter of area amplification function which characterized in that: the high-pass filter and the low-pass filter are connected in series, the frequency range of the high-pass filter which can pass through is not less than 950MHz, the frequency range of the low-pass filter which can pass through is not more than 1450MHz, a circuit formed by the high-pass filter and the low-pass filter is also matched and connected with a bypass circuit which is communicated with direct current and resistance alternating current, and a signal amplifier in the band-pass of 950 MHz-1450 MHz is also arranged on the circuit.

2. The anti-5G interference filter with amplification function of claim 1, wherein: and an attenuation device for attenuating the radio frequency signal is also arranged between the high-pass filter and the low-pass filter.

3. The anti-5G interference filter with amplification function of claim 2, wherein: the filter is arranged in a metal shell, a radio frequency interface is arranged on the metal shell and comprises an input interface and an output interface, and a metal radio frequency isolation net is further arranged in the metal shell.

4. The anti-5G interference filter with amplification function of claim 3, wherein: the radio frequency interface is an F head or a BNC head or an N head.

5. The anti-5G interference filter with amplification function of claim 3, wherein: and the metal shell is also provided with a socket for inserting the attenuation device.

6. The anti-5G interference filter with amplification function of claim 5, wherein: a group of jacks are arranged on the metal shell.

7. The anti-5G interference filter with amplification function of claim 5, wherein: at least 2 groups of jacks are arranged on the metal shell.

8. The anti-5G interference filter with amplification function according to any one of claims 3-7, characterized in that: the metal shell is also provided with a case which is matched and connected.

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