CN209860873U

CN209860873U - anti-5G signal interference special frequency demultiplier

Info

Publication number: CN209860873U
Application number: CN201920931903.XU
Authority: CN
Inventors: 何洋铭
Original assignee: ZHONGSHAN HANYANG ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: ZHONGSHAN HANYANG ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2019-12-27
Anticipated expiration: 2029-06-20

Abstract

The utility model provides a purpose-built frequency demultiplier of anti 5G signal interference, includes the shell, is equipped with RF amplifier circuit, comb filter, IC-made integrated circuit and the frequency restriction filter of electricity connection in proper order in the shell, IC-made integrated circuit is including switching polarization circuit, RF amplifier circuit receives the control of switching polarization circuit to make first RF preceding stage amplification module and second RF preceding stage amplification module switch work in turn, and IC-made integrated circuit still includes local oscillator, mixer and back stage amplification circuit, and the frequency restriction filter is ceramic filter, and the shell is including the waveguide section of thick bamboo that receives high frequency signal, and the waveguide section of thick bamboo receives the frequency signal scope at 3.7-4.2 khz.

Description

anti-5G signal interference special frequency demultiplier

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of communication, in particular to a special frequency demultiplier capable of resisting 5G signal interference.

[ background of the invention ]

At present, the signal reception of the C band is greatly influenced due to the coming of the 5G signal, because the frequency of the C band is input to the frequency 3.6GE, while the frequency of the 5G signal is 3.58G, the frequencies of the two are very close, the signal transmission of the C band is interfered by the frequency of the 5G signal, which causes the MER value to decrease, the LNB will generate large oscillation, and the normal reception of the C band satellite signal by the signal receiver is influenced.

The grant notice number CN206559319U discloses a frequency demultiplier, which comprises a first-stage radio frequency amplifier, a second-stage radio frequency amplifier, a first radio frequency filter, a mixing amplifying circuit, a second intermediate frequency filter, an intermediate frequency combiner, a fifth-stage intermediate frequency amplifier and an output port, which are electrically connected in sequence, wherein the mixing amplifying circuit comprises a voltage-controlled oscillator, a phase-locked loop integrated circuit and an intermediate frequency amplifying circuit, which are electrically connected in sequence.

The grant publication No. CN206060692U discloses an integrated frequency demultiplier, which comprises a square-shell-shaped tuner, wherein an opening is formed in the bottom end of the tuner, an output head is arranged at the top end of the tuner, a casing is arranged at the upper part of the tuner, the casing is a flat-plate-shaped casing, a groove is formed in the front side of the casing, and an integrated circuit board is arranged in the groove; the back plane of the shell is flatly attached to the mounting plane on one side of the high-frequency head, the bottom opening of the high-frequency head is changed into a cylindrical waveguide tube from a square shape through mechanical extrusion, and a horizontal probe for receiving a horizontal polarization signal and a vertical probe for receiving a vertical polarization signal are arranged in the waveguide tube.

The current frequency demultiplier can not interfere with 5G signals very much, and a frequency demultiplier resisting 5G signal interference is needed.

[ Utility model ] content

In order to solve the above problems, the present application provides a special frequency demultiplier for resisting 5G signal interference, which can reduce the influence of 5G signal interference to a greater extent and normally receive satellite signals.

In order to achieve the above purpose, the following technical solutions are proposed in the present application:

a special frequency demultiplier for resisting 5G signal interference comprises a shell and is characterized in that: an RF amplifying circuit, a comb filter, an IC integrated circuit and a frequency limiting filter which are electrically connected in sequence are arranged in the shell, and the IC integrated circuit comprises a switching polarization circuit.

The special frequency demultiplier for resisting 5G signal interference is characterized in that: RF amplifier circuit includes first RF preceding stage amplification module, second RF preceding stage amplification module and second level RF amplification module, the output of first RF preceding stage amplification module, second RF preceding stage amplification module is connected with the input of second level RF amplification module respectively, second level RF amplification module output is connected the input of comb filter, first RF preceding stage amplification module receives vertical signal input, second RF preceding stage amplification module receives horizontal signal input, RF amplifier circuit receives the switching polarization circuit control and makes first RF preceding stage amplification module and second RF preceding stage amplification module switch work in turn.

The special frequency demultiplier for resisting 5G signal interference is characterized in that: the IC integrated circuit also comprises a local oscillator, a mixer and a post-stage amplifying circuit.

The special frequency demultiplier for resisting 5G signal interference is characterized in that: the frequency limiting filter is a ceramic filter.

The special frequency demultiplier for resisting 5G signal interference is characterized in that: the shell comprises a waveguide cylinder for receiving high-frequency signals, and the waveguide cylinder receives frequency signals in the range of 3.7-4.2 khz.

The beneficial effects of the invention are as follows:

1. a comb filter is designed at an input end to carry out early filtering on an interference signal so as to filter out signals except BAND, and the 5G signal is weakened by a lot, and meanwhile, poor receiving caused by influence on a Noise value Noise can be avoided by debugging the comb filter.

2. By arranging the frequency limiting filter at the rear end, the intermediate frequency signal output by the IC is filtered, the 5G interference signal is filtered out, and the satellite signal is ensured to be normally received.

3. The frequency limiting filter adopts a ceramic filter, so that the frequency demultiplier obtains more ideal frequency response characteristics and higher precision.

4. The aperture of the waveguide cylinder is adjusted to enable the range of the waveguide cylinder receiving frequency signals to be 3.7-4.2khz, the 5G signals are preliminarily filtered, and the precision of the frequency demultiplier is increased.

[ description of the drawings ]

Fig. 1 is a hardware configuration diagram of a down converter.

In the figure: 1. an RF amplification circuit; 11. a first RF pre-amplification module; 12. a second RF pre-amplifier module; 13. a second stage RF amplification module; 2. a comb filter; 3. an IC integrated circuit; 31. switching the polarization circuit; 4. a frequency limiting filter.

[ detailed description ] embodiments

The following further description is made in conjunction with the accompanying drawings and the detailed description.

As shown in fig. 1, a special frequency demultiplier for resisting 5G signal interference includes a housing, an RF amplifying circuit 1, a comb filter 2, an IC integrated circuit 3 and a frequency limiting filter 4 are disposed in the housing, and the IC integrated circuit 3 includes a switching polarization circuit 31.

The frequency limiting filter filters the intermediate frequency signal output by the IC integrated circuit, and filters out 5G interference signals to ensure normal satellite signal receiving.

In this application, RF amplifier circuit includes first RF preceding stage amplifier module 11, second RF preceding stage amplifier module 12 and second level RF amplifier module 13, the output of first RF preceding stage amplifier module 11, second RF preceding stage amplifier module 12 is connected with the input of second level RF amplifier module 13 respectively, second level RF amplifier module 13 output is connected comb filter 2's input, first RF preceding stage amplifier module 11 receives vertical signal input, second RF preceding stage amplifier module 12 receives horizontal signal input, RF amplifier circuit 1 receives the switching work of switching polarization circuit 31 control messenger first RF preceding stage amplifier module 11 and second RF preceding stage amplifier module 12 in turn, and RF amplifier module amplification rate is 12-24 db.

In this application, the IC 3 further includes a local oscillator, a mixer, and a post-amplification circuit, and the IC has an amplification rate of 50db, and the amplification rate of the signal is about 65 db.

In the present application, the frequency limiting filter 4 is a ceramic filter, so that the frequency demultiplier obtains more ideal frequency response characteristics and higher precision.

In the present application, the housing comprises a waveguide cylinder for receiving the high-frequency signal, and the waveguide cylinder receives the frequency signal in the range of 3.7-4.2 khz.

The working principle is as follows:

the frequency demultiplier receives signals through a waveguide tube, primarily filters 5G signals, then the signals are input and amplified through an RF amplifying circuit, in order to prevent poor receiving caused by influence on noise values, a group of comb-shaped filters are arranged behind the RF amplifying circuit, the 5G signals are further filtered, the filtered signals continuously enter an IC integrated circuit, the IC integrated circuit comprises a local oscillator, a frequency mixer and a post-stage amplifying circuit, intermediate frequency signals are output from the IC integrated circuit, a frequency limiting filter is arranged behind the output of the IC integrated circuit to filter 5G interference signals, and the processed signals are output.

The above description is only for the preferred embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present application, and equivalent alternatives or modifications according to the technical solutions and the inventive concepts of the present application, and all such alternatives or modifications are encompassed in the scope of the present application.

Claims

1. A special frequency demultiplier for resisting 5G signal interference comprises a shell and is characterized in that: an RF amplifying circuit (1), a comb filter (2), an IC integrated circuit (3) and a frequency limiting filter (4) which are electrically connected in sequence are arranged in the shell, and the IC integrated circuit (3) comprises a switching polarization circuit (31).

2. The anti-5G signal interference tailored frequency downconverter of claim 1, wherein: the RF amplification circuit comprises a first RF pre-stage amplification module (11), a second RF pre-stage amplification module (12) and a second RF amplification module (13), wherein the output ends of the first RF pre-stage amplification module (11) and the second RF pre-stage amplification module (12) are respectively connected with the input end of the second RF amplification module (13), the output end of the second RF amplification module (13) is connected with the input end of the comb filter (2), the first RF pre-stage amplification module (11) receives vertical signal input, the second RF pre-stage amplification module (12) receives horizontal signal input, and the RF amplification circuit (1) is controlled by a switching polarization circuit (31) to enable the first RF pre-stage amplification module (11) and the second RF pre-stage amplification module (12) to switch to work in turn.

3. The anti-5G signal interference tailored frequency downconverter of claim 1, wherein: the IC integrated circuit (3) further comprises a local oscillator, a mixer and a post-stage amplifying circuit.

4. The anti-5G signal interference tailored frequency downconverter of claim 1, wherein: the frequency limiting filter (4) is a ceramic filter.

5. The anti-5G signal interference tailored frequency downconverter of claim 1, wherein: the shell comprises a waveguide cylinder for receiving high-frequency signals, and the waveguide cylinder receives frequency signals in the range of 3.7-4.2 khz.