CN210351141U

CN210351141U - Broadband mixing filter circuit compatible with 5G communication frequency band

Info

Publication number: CN210351141U
Application number: CN201921702438.9U
Authority: CN
Inventors: 张�雄; 温煦; 潘钟声
Original assignee: Guangzhou Yameizhi Technology Co ltd
Current assignee: Yamei Zhilian Data Technology Co ltd
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-04-17
Anticipated expiration: 2029-10-11

Abstract

The utility model provides a compatible 5G communication frequency channel's broadband mixing filter circuit, including signal incoming end, GSM filter sub-circuit, LTE filter sub-circuit, 5G communication filter sub-circuit; the GSM filter sub-circuit, the LTE filter sub-circuit and the 5G communication filter sub-circuit are electrically connected with the signal access end; a GSM load interface is arranged on the GSM filter sub-circuit; an LTE load interface is arranged on the LTE filter sub-circuit; the 5G communication filter sub-circuit is provided with a 5G load interface; and the radio frequency current flows to a load interface of a corresponding waveband after being filtered by the GSM filter sub-circuit, the LTE filter sub-circuit and the 5G communication filter sub-circuit, so that the filtering operation of the radio frequency current is completed. The utility model provides a wide broadband mixing filter circuit has compatible the filter sub-circuit of GSM frequency channel, LTE frequency channel and 5G frequency channel, has the inhibitory action and attenuate to specific frequency's radio frequency current, forces the electric current to be entered into selectively in the sub-circuit that is not inhibited to realize the filtering to radio frequency current.

Description

Broadband mixing filter circuit compatible with 5G communication frequency band

Technical Field

The utility model relates to a 5G communication technology field, more specifically relates to a compatible 5G communication frequency channel's broadband mixing filter circuit.

Background

The filter is widely applied to radio frequency, intermediate frequency and baseband parts of a receiver, is also called as a radio frequency interference filter, is mainly used in electronic equipment working at high frequency and is used for greatly attenuating high-frequency interference signals generated by the high-frequency electronic equipment. However, with the development of the 5G communication technology, the operating frequency of the electronic device is rapidly increased, the frequency of the electromagnetic interference is also higher and higher, and the interference frequency generally reaches hundreds of MHz, even GHz, so that due to the too high frequency, the existing filter cannot be compatible with the 5G communication frequency band, and due to the constraint of the manufacturing cost, the cost of the product is often increased by being compatible with the 5G communication frequency band.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome current wave filter and have the technical defect of unable compatible 5G communication frequency channel, provide a broadband mixing filter circuit of compatible 5G communication frequency channel.

In order to solve the technical problem, the technical scheme of the utility model as follows:

a broadband mixing filter circuit compatible with a 5G communication frequency band comprises a signal access end, a GSM filter sub-circuit, an LTE filter sub-circuit and a 5G communication filter sub-circuit; wherein:

the input end of the GSM filter sub-circuit, the input end of the LTE filter sub-circuit and the input end of the 5G communication filter sub-circuit are electrically connected with the signal access end;

a GSM load interface is arranged on the output end of the GSM filter sub-circuit;

an LTE load interface is arranged on the output end of the LTE filter sub-circuit;

a 5G load interface is arranged on the output end of the 5G communication filtering sub-circuit;

the GSM filter sub-circuit, the LTE filter sub-circuit and the 5G communication filter sub-circuit work in parallel, radio frequency current enters the three filter sub-circuits through the signal access end to be inhibited and attenuated, and the radio frequency current of different frequency bands is obtained respectively and flows to load interfaces of corresponding frequency bands.

In the above scheme, after the radio frequency current enters the broadband mixing filter circuit through the signal access terminal, since the GSM filter sub-circuit only allows part of the GSM frequency band current to pass, part of the LTE frequency band current and part of the 5G frequency band current will be filtered out, so that only part of the GSM frequency band current can be obtained from the GSM load interface; because the LTE filter sub-circuit only allows partial current of the LTE frequency band to pass through, partial current of the GSM frequency band and partial current of the 5G frequency band are filtered, and only partial current of the LTE frequency band can be obtained from the LTE load interface; because the 5G communication filter sub-circuit only allows the 5G frequency band part current to pass through, the GSM frequency band part current and the LTE frequency band part current are filtered, and therefore the 5G load interface can only obtain the 5G frequency band part current. In summary, the circuit is compatible with the filtering functions of the GSM frequency band, the LTE frequency band, and the 5G frequency band, and the three sub-circuits of the GSM filter sub-circuit, the LTE filter sub-circuit, and the 5G communication filter sub-circuit all have an inhibiting effect on the radio frequency current of a specific frequency and attenuate the radio frequency current, so that the current is forced to selectively enter the filter sub-circuit which is not inhibited, and the radio frequency currents of different frequency bands are obtained at the load interfaces of the corresponding frequency bands after the inhibition and attenuation of the three filter sub-circuits, thereby realizing the filtering of the radio frequency currents of each frequency band part.

The GSM filter sub-circuit is provided with an LTE frequency band suppression cut-off section and a 5G frequency band suppression cut-off section; after the radio frequency current is input into the GSM filter sub-circuit, an LTE frequency band part is filtered at the LTE frequency band suppression cut-off section, and a 5G frequency band part is filtered at the 5G frequency band suppression cut-off section.

The LTE filter sub-circuit is provided with a GSM frequency band suppression cut-off section and a 5G frequency band suppression cut-off section; after the radio frequency current is input into the LTE filter sub-circuit, the GSM frequency band suppression cut-off section filters a GSM frequency band part, and the 5G frequency band suppression cut-off section filters a 5G frequency band part.

The 5G communication filter sub-circuit is provided with a GSM frequency band suppression cut-off section and an LTE frequency band suppression cut-off section; after the radio frequency current is input into the 5G communication filter sub-circuit, the GSM frequency band rejection cut-off section filters the GSM frequency band part, and the LTE frequency band rejection cut-off section filters the LTE frequency band part.

The GSM filter sub-circuit comprises a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6; wherein:

one end of the capacitor C1 is electrically connected with the signal access end, and the other end of the capacitor C1 is electrically connected with one end of the resistor R1 and one end of the capacitor C2;

the other end of the resistor R1 is electrically connected with one end of the capacitor C3; the other end of the capacitor C2 is grounded;

the other end of the capacitor C3 is electrically connected with one end of the resistor R2 and one end of the capacitor C4;

the other end of the resistor R2 is electrically connected with one end of the capacitor C5; the other end of the capacitor C4 is grounded;

the other end of the capacitor C5 is electrically connected with one end of the resistor R3 and one end of the capacitor C6;

the other end of the resistor R3 is electrically connected with one end of the capacitor C7; the other end of the capacitor C6 is grounded;

the LTE frequency band suppression cut-off section is formed by the capacitor C2, the capacitor C3, the capacitor C4, the capacitor C5, the capacitor C6, the resistor R1 and the resistor R2;

the other end of the capacitor C7 is electrically connected with one end of the resistor R4 and one end of the capacitor C8;

the other end of the resistor R4 is electrically connected with one end of the capacitor C9; the other end of the capacitor C8 is grounded;

the other end of the capacitor C9 is electrically connected with one end of the resistor R5 and one end of the capacitor C10;

the other end of the resistor R5 is electrically connected with one end of the capacitor C11; the other end of the capacitor C10 is grounded;

the other end of the capacitor C11 is electrically connected with one end of the resistor R6 and one end of the capacitor C12;

the other end of the resistor R6 is electrically connected with the GSM load interface;

the capacitor C8, the capacitor C9, the capacitor C10, the capacitor C11, the capacitor C12, the resistor R4 and the resistor R5 jointly form the 5G frequency band suppression cut-off section.

The LTE filter sub-circuit comprises a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, an inductor L1, an inductor L2, an inductor L3, an inductor L4, an inductor L5 and an inductor L6; wherein:

one end of the capacitor C13 is electrically connected with the signal access end, and the other end of the capacitor C14 is electrically connected with one end of the inductor L1;

the other end of the capacitor C14 is electrically connected with one end of the resistor R7; the other end of the inductor L1 is grounded;

the other end of the resistor R7 is electrically connected with one end of the capacitor C15;

the other end of the capacitor C15 is electrically connected with one end of the capacitor C16 and one end of the inductor L2;

the other end of the capacitor C16 is electrically connected with one end of the resistor R8; the other end of the inductor L2 is grounded;

the other end of the resistor R8 is electrically connected with one end of the capacitor C17;

the other end of the capacitor C17 is electrically connected with one end of the capacitor C18 and one end of the inductor L3;

the other end of the capacitor C18 is electrically connected with one end of the resistor R9; the other end of the inductor L3 is grounded;

the other end of the resistor R9 is electrically connected with one end of the capacitor C19;

the other end of the capacitor C19 is electrically connected with one end of the inductor L4;

the other end of the inductor L4 is electrically connected with one end of the resistor R10 and one end of the capacitor C20;

the other end of the resistor R10 is electrically connected with one end of the inductor L5; the other end of the capacitor C20 is grounded;

the capacitor C14, the capacitor C15, the capacitor C16, the capacitor C17, the capacitor C18, the capacitor C19, the capacitor C20, the resistor R7, the resistor R8, the resistor R9, the inductor L1, the inductor L2, the inductor L3 and the inductor L4 jointly form the GSM frequency band suppression cut-off section;

the other end of the inductor L5 is electrically connected with one end of the resistor R11 and one end of the capacitor C21;

the other end of the resistor R11 is electrically connected with one end of the inductor L6; the other end of the capacitor C21 is grounded;

the other end of the inductor L6 is electrically connected with one end of the resistor R12 and one end of the capacitor C22;

the other end of the resistor R12 is electrically connected with the LTE load interface; the other end of the capacitor C22 is grounded;

the capacitor C21, the capacitor C22, the resistor R11 and the inductor L6 jointly form the 5G frequency band suppression cut-off section.

The 5G communication filter sub-circuit comprises a capacitor C23, a capacitor C24, a capacitor C25, a capacitor C26, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C31, a capacitor C32, a capacitor C33, a capacitor C34, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, an inductor L7, an inductor L8, an inductor L9, an inductor L10, an inductor L11 and an inductor L12; wherein:

one end of the capacitor C23 is electrically connected with the signal access end, and the other end of the capacitor C24 is electrically connected with one end of the inductor L7;

the other end of the capacitor C24 is electrically connected with one end of the resistor R13; the other end of the inductor L7 is grounded;

the other end of the resistor R13 is electrically connected with one end of the capacitor C25;

the other end of the capacitor C25 is electrically connected with one end of the capacitor C26 and one end of the inductor L8;

the other end of the capacitor C26 is electrically connected with one end of the resistor R14; the other end of the inductor L8 is grounded;

the other end of the resistor R14 is electrically connected with one end of the capacitor C27;

the other end of the capacitor C27 is electrically connected with one end of the capacitor C28 and one end of the inductor L9;

the other end of the capacitor C28 is electrically connected with one end of the resistor R15; the other end of the inductor L9 is grounded;

the capacitor C24, the capacitor C25, the capacitor C26, the capacitor C27, the resistor R13, the resistor R14, the inductor L7, the inductor L8 and the inductor L9 jointly form the GSM frequency band rejection cut-off section;

the other end of the resistor R15 is electrically connected with one end of the capacitor C29;

the other end of the capacitor C29 is electrically connected with one end of the capacitor C30 and one end of the inductor L10;

the other end of the capacitor C30 is electrically connected with one end of the resistor R16; the other end of the inductor L10 is grounded;

the other end of the resistor R16 is electrically connected with one end of the capacitor C31;

the other end of the capacitor C31 is electrically connected with one end of the capacitor C32 and one end of the inductor L11;

the other end of the capacitor C32 is electrically connected with one end of the resistor R17; the other end of the inductor L11 is grounded;

the other end of the resistor R17 is electrically connected with one end of the capacitor C33;

the other end of the capacitor C33 is electrically connected with one end of the capacitor C34 and one end of the inductor L12;

the other end of the capacitor C34 is electrically connected with one end of the resistor R18; the other end of the inductor L12 is grounded;

the other end of the resistor R18 is electrically connected with the 5G load interface;

the LTE frequency band suppression cut-off section is formed by the capacitor C30, the capacitor C31, the capacitor C32, the capacitor C33, the resistor R16, the resistor R17, the inductor L10, the inductor L11 and the inductor L12.

In the above scheme, the LTE frequency band rejection cutoff section included in the GSM filter sub-circuit employs a third-order parallel LC loop for rejecting LTE frequency band current, and the 5G frequency band rejection cutoff section employs a third-order loop for rejecting 5G frequency band current; the LTE filter sub-circuit also has parallel LC circuits for filtering GSM frequency bands and 5G frequency bands, wherein a GSM frequency band suppression cut-off section formed by four-order parallel LC circuits is used for suppressing the current of the GSM frequency band from passing through, and a 5G frequency band suppression cut-off section formed by two-order circuits is used for suppressing the current of the 5G frequency band from passing through; the 5G communication filtering sub-circuit also has parallel LC loops to filter GSM frequency bands and LTE frequency bands, wherein the third-order parallel LC loops are adopted to form the GSM frequency band rejection cut-off section which is used for suppressing the current of the GSM frequency band to pass through, and the third-order loops are adopted to form the LTE frequency band rejection cut-off section which is used for suppressing the current of the LTE frequency band to pass through.

In the scheme, the broadband mixing filter circuit is realized by adopting a pcb surface copper-clad technology, the final molding size is only 110 x 80 x 1mm, the broadband mixing filter circuit belongs to a smaller level in the current mainstream products, and the cost of the broadband mixing filter circuit cannot be increased while the broadband mixing filter circuit is compatible with a 5G communication frequency band.

Compared with the prior art, the utility model discloses technical scheme's beneficial effect is:

the utility model provides a pair of compatible 5G communication frequency channel's broadband mixing filter circuit, through GSM filter sub-circuit, LTE filter sub-circuit, three sub-circuits of 5G communication filter sub-circuit all have the inhibitory action and attenuate to specific frequency's radio frequency current, force the electric current to be entered into selectively in the sub-circuit that is not inhibited to realize the filtering to radio frequency current.

Drawings

Figure 1 is a schematic circuit diagram of a wideband mixer filter circuit;

FIG. 2 is a schematic circuit diagram of a GSM filter sub-circuit;

FIG. 3 is a schematic circuit diagram of an LTE filter sub-circuit;

FIG. 4 is a schematic circuit diagram of a 5G communication filter sub-circuit;

FIG. 5 is a schematic view showing the effect of the cutoff in example 2;

FIG. 6 is a diagram illustrating the filtering effect of the GSM filter sub-circuit;

fig. 7 is a schematic diagram of the filtering effect of the 5G communication filtering sub-circuit.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent;

for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;

it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 1, a broadband mixing filter circuit compatible with a 5G communication frequency band includes a signal access terminal, a GSM filter sub-circuit, an LTE filter sub-circuit, and a 5G communication filter sub-circuit; wherein:

the GSM filter sub-circuit, the LTE filter sub-circuit and the 5G communication filter sub-circuit work in parallel, different filter sub-circuits have an inhibiting effect on radio frequency currents with different frequencies and perform attenuation, the radio frequency currents are forced to selectively enter the three filter sub-circuits to perform inhibition and attenuation, finally, the radio frequency currents of corresponding frequency bands are obtained and flow to load interfaces of the corresponding frequency bands, and the filtering operation of the radio frequency currents is completed.

In a specific implementation process, after the radio-frequency current enters the broadband mixing filter circuit through the signal access end, as the GSM filter sub-circuit only allows part of the current of the GSM frequency band to pass, part of the current of the LTE frequency band and part of the current of the 5G frequency band are filtered out, only part of the current of the GSM frequency band can be obtained from the GSM load interface; because the LTE filter sub-circuit only allows partial current of the LTE frequency band to pass through, partial current of the GSM frequency band and partial current of the 5G frequency band are filtered, and only partial current of the LTE frequency band can be obtained from the LTE load interface; because the G communication filter sub-circuit only allows the 5G frequency band part current to pass through, the GSM frequency band part current and the LTE frequency band part current are filtered, and therefore the 5G frequency band part current can only be obtained from the 5G load interface.

In summary, the circuit is compatible with filtering functions of a GSM frequency band, an LTE frequency band, and a 5G frequency band, and three sub-circuits of the GSM filter sub-circuit, the LTE filter sub-circuit, and the 5G communication filter sub-circuit all have a suppression effect on a radio frequency current of a specific frequency and attenuate the radio frequency current, so that the current is forced to selectively enter the sub-circuit which is not suppressed, and filtering of the radio frequency current is achieved.

More specifically, the GSM filter sub-circuit is provided with an LTE frequency band rejection cut-off section and a 5G frequency band rejection cut-off section; after the radio frequency current is input into the GSM filter sub-circuit, an LTE frequency band part is filtered at the LTE frequency band suppression cut-off section, and a 5G frequency band part is filtered at the 5G frequency band suppression cut-off section.

More specifically, a GSM frequency band rejection cut-off segment and a 5G frequency band rejection cut-off segment are arranged on the LTE filter sub-circuit; after the radio frequency current is input into the LTE filter sub-circuit, the GSM frequency band suppression cut-off section filters a GSM frequency band part, and the 5G frequency band suppression cut-off section filters a 5G frequency band part.

More specifically, a GSM frequency band rejection cut-off segment and an LTE frequency band rejection cut-off segment are arranged on the 5G communication filter sub-circuit; after the radio frequency current is input into the 5G communication filter sub-circuit, the GSM frequency band rejection cut-off section filters the GSM frequency band part, and the LTE frequency band rejection cut-off section filters the LTE frequency band part.

More specifically, as shown in fig. 2, the GSM filter sub-circuit includes a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, and a resistor R6; wherein:

More specifically, as shown in fig. 3, the LTE filter sub-circuit includes a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, an inductor L1, an inductor L2, an inductor L3, an inductor L4, an inductor L5, and an inductor L6; wherein:

More specifically, as shown in fig. 4, the 5G communication filter sub-circuit includes a capacitor C23, a capacitor C24, a capacitor C25, a capacitor C26, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C31, a capacitor C32, a capacitor C33, a capacitor C34, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, an inductor L7, an inductor L8, an inductor L9, an inductor L10, an inductor L11, and an inductor L12; wherein:

In a specific implementation process, the LTE frequency band suppression cut-off section included in the GSM filter sub-circuit adopts a three-order parallel LC circuit for suppressing the LTE frequency band current from passing through, and the 5G frequency band suppression cut-off section adopts a three-order circuit for suppressing the 5G frequency band current from passing through; the LTE filter sub-circuit also has parallel LC circuits for filtering GSM frequency bands and 5G frequency bands, wherein a GSM frequency band suppression cut-off section formed by four-order parallel LC circuits is used for suppressing the current of the GSM frequency band from passing through, and a 5G frequency band suppression cut-off section formed by two-order circuits is used for suppressing the current of the 5G frequency band from passing through; the 5G communication filtering sub-circuit also has parallel LC loops to filter GSM frequency bands and LTE frequency bands, wherein the third-order parallel LC loops are adopted to form the GSM frequency band rejection cut-off section which is used for suppressing the current of the GSM frequency band to pass through, and the third-order loops are adopted to form the LTE frequency band rejection cut-off section which is used for suppressing the current of the LTE frequency band to pass through. Therefore, the three filter sub-circuits of the GSM filter sub-circuit, the LTE filter sub-circuit and the 5G communication filter sub-circuit have the inhibiting effect on the radio frequency current with the specific frequency and attenuate, so that the input frequency band current is forced to selectively enter the filter sub-circuit which is not inhibited, the filtering of the radio frequency current is realized, and the corresponding frequency band current is obtained.

In the specific implementation process, the broadband mixing filter circuit is realized by adopting a pcb surface copper-clad technology, the final molding size is only 110 x 80 x 1mm, the broadband mixing filter circuit belongs to a smaller level in the current mainstream products, and the cost of the broadband mixing filter circuit cannot be increased while the broadband mixing filter circuit is compatible with a 5G communication frequency band.

Example 2

More specifically, as shown in fig. 2, the GSM filter sub-circuit is designed for filtering in the low-pass part, and because the low-pass filter part only allows GSM frequency band current to pass, the GSM filter sub-circuit adopts a 6-stage LC parallel circuit to form a frequency-selective loop; the filter response takes the insertion loss and the response of linear phase as the main characteristics, so the GSM filter sub-circuit adopts a Butterworth mathematical response function, and the characteristic of the GSM filter sub-circuit is that the amplitude response in a pass band is flat, and the out-of-band response is increased along with the high frequency response.

In a specific implementation process, as shown in fig. 2, the first three levels are the LTE frequency band rejection cutoff segment for filtering out an LTE frequency band portion, and the second three levels are the 5G frequency band rejection cutoff segment for filtering out a 5G frequency band portion. The integration is carried out after the series connection in the frequency band of the six-level LC frequency selection loop by adopting an out-of-band cut-off function, the final cut-off effect is shown in figure 5, the loss of the GSM frequency band is about 0.2dB, and the cut-off is carried out outside the band.

In a specific implementation process, as shown in fig. 6, the radio frequency current passes through a phase response of a GSM filter sub-circuit of the mixer filter circuit, and it can be seen that the phase linearity of the current phase after passing through the circuit is good, and there is no concave-convex situation, so that GSM frequency band filtering of the radio frequency current is realized.

In the specific implementation process, similarly, a band-pass part allowing only the LTE frequency band current to pass through and a high-pass part allowing only the 5G frequency band current to pass through are respectively designed, so that the LTE frequency band and the 5G frequency band of the radio frequency current are filtered.

Example 3

More specifically, on the basis of embodiment 2, the broadband mixing filter circuit is realized by adopting a pcb surface copper-clad technology, a relative dielectric constant between the circuit and the ground is 2.65, and the thickness H of a plate is 1 mm; the GSM filter sub-circuit and the LTE filter sub-circuit are connected together through the signal access end, each circuit is responsible for filtering currents in an out-band frequency band and matching impedance of an in-band frequency band, the size of a final forming size is only 110 x 80 x 1mm, the GSM filter sub-circuit and the LTE filter sub-circuit belong to a small level in the current mainstream products, and the cost of the products cannot be increased while the 5G communication frequency band is compatible.

In a specific implementation process, the GSM filter sub-circuit is provided with a parallel LC loop filter circuit, wherein a third-order parallel LC loop is used for inhibiting the current of an LTE frequency band from passing through, in addition, the third-order loop is used for inhibiting the current of a 5G frequency band from passing through, the open-circuit line length of the LC device is obtained according to the 1/4 length of the corresponding wavelength from the frequencies of the LTE frequency band and the 5G frequency band, meanwhile, the line width and the line length of a GSM frequency band line are only matched with the impedance of the GSM frequency band, the method can greatly reduce the radio frequency current outside the GSM frequency band from passing through, and ensure that the channels are not interfered; the LTE filter sub-circuit is also provided with parallel LC loop filter circuits, wherein a fourth-order parallel LC loop is used for inhibiting the current of the GSM frequency band from passing through, and the other two-order loop is used for inhibiting the current of the 5G frequency band from passing through; the 5G communication filtering sub-circuit is also provided with a parallel LC loop filtering circuit, wherein a third-order parallel LC loop is used for inhibiting the current of a GSM frequency band from passing through, and the other third-order loop is used for inhibiting the current of an LTE frequency band from passing through; and finally, connecting the load end of each circuit with active or passive communication radio frequency equipment.

In a specific implementation process, as shown in fig. 7, the radio frequency current passes through a 5G communication filter sub-circuit of the mixer filter circuit, the sub-circuit is a high-pass circuit, only the 5G frequency band current is allowed to pass through, the GSM frequency band part and the LTE frequency band part are restrained and cut off, the loss is about 0.7dB, the pass rate is good, the impedance matching is realized, and the out-of-band cut-off ratio of the GSM frequency band part and the LTE frequency band part is more than 25 dB.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a compatible 5G communication frequency channel's broadband mixing filter circuit, includes signal incoming end, GSM filter sub-circuit, LTE filter sub-circuit, its characterized in that: the device also comprises a 5G communication filtering sub-circuit; wherein:

2. The wide band mixer filter circuit of claim 1, wherein said mixer filter circuit is compatible with 5G communication bands, and further comprising: an LTE frequency band suppression cut-off section and a 5G frequency band suppression cut-off section are arranged on the GSM filter sub-circuit; after the radio frequency current is input into the GSM filter sub-circuit, an LTE frequency band part is filtered at the LTE frequency band suppression cut-off section, and a 5G frequency band part is filtered at the 5G frequency band suppression cut-off section.

3. The wide band mixer filter circuit of claim 1, wherein said mixer filter circuit is compatible with 5G communication bands, and further comprising: a GSM frequency band suppression cut-off section and a 5G frequency band suppression cut-off section are arranged on the LTE filter sub-circuit; after the radio frequency current is input into the LTE filter sub-circuit, the GSM frequency band suppression cut-off section filters a GSM frequency band part, and the 5G frequency band suppression cut-off section filters a 5G frequency band part.

4. The wide band mixer filter circuit of claim 1, wherein said mixer filter circuit is compatible with 5G communication bands, and further comprising: a GSM frequency band suppression cut-off section and an LTE frequency band suppression cut-off section are arranged on the 5G communication filter sub-circuit; after the radio frequency current is input into the 5G communication filter sub-circuit, the GSM frequency band rejection cut-off section filters the GSM frequency band part, and the LTE frequency band rejection cut-off section filters the LTE frequency band part.

5. The wide band mixer filter circuit of claim 2, wherein said mixer filter circuit is compatible with 5G communication bands, and further comprising: the GSM filter sub-circuit comprises a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6; wherein:

6. The wideband mixer filter circuit according to claim 3, further comprising: the LTE filter sub-circuit comprises a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, an inductor L1, an inductor L2, an inductor L3, an inductor L4, an inductor L5 and an inductor L6; wherein:

7. The wideband mixer filter circuit according to claim 4, further comprising: the 5G communication filter sub-circuit comprises a capacitor C23, a capacitor C24, a capacitor C25, a capacitor C26, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C31, a capacitor C32, a capacitor C33, a capacitor C34, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, an inductor L7, an inductor L8, an inductor L9, an inductor L10, an inductor L11 and an inductor L12; wherein: