CN215990723U - Filter and filtering system - Google Patents

Abstract

The disclosure relates to the technical field of communication, and provides a filter and a filtering system. The filter includes: low-pass filtering subassembly and high-pass filtering subassembly, wherein, the low-pass filtering subassembly includes first resonance subassembly, first electric capacity and second electric capacity, and the high-pass filtering subassembly includes: a second resonant component, a first inductance and a second inductance; at least one of the first capacitor, the second capacitor, the first inductor and the second inductor is an adjustable device; one ends of the first capacitor and the second capacitor are respectively connected with the first resonance component, and the other ends of the first capacitor and the second capacitor are both grounded; one end of the first inductor and one end of the second inductor are respectively connected with the second resonance component, and the other ends of the first inductor and the second inductor are both grounded; the first resonant assembly is connected in series with the second resonant assembly. By adopting the filter, the number of the filters can be reduced, the filters are prevented from being switched back and forth, the insertion loss is reduced, and the communication quality of data transmission is improved.

Description

Filter and filtering system

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a filter and a filtering system.

Background

In a communication system, in the process of data transmission in different frequency bands, mutual interference can be generated to influence communication quality, so that in order to improve the communication quality, filters corresponding to a plurality of frequency bands are respectively arranged, and are used for filtering data transmission signals, so that interference signals are suppressed, and the communication quality of data transmission is ensured.

However, the existing filter is an unadjustable filter, and for the data transmission process in different frequency bands, the corresponding filter needs to be switched according to the channel values corresponding to different data transmission channels to adapt to the channel values corresponding to different data transmission channels, so as to further perform filtering processing.

However, with the existing non-tunable filter, the number of filters is too large, and the insertion loss is large.

Disclosure of Invention

In view of the above, it is desirable to provide a filter and a filtering system.

The disclosed embodiment provides a filter, which includes:

the filter comprises a low-pass filter component and a high-pass filter component, wherein the low-pass filter component comprises a first resonance component, a first capacitor and a second capacitor, and the high-pass filter component comprises: a second resonant component, a first inductance and a second inductance; wherein at least one of the first capacitor, the second capacitor, the first inductor and the second inductor is an adjustable device;

one end of the first capacitor and one end of the second capacitor are respectively connected with the first resonance component, and the other ends of the first capacitor and the second capacitor are both grounded; one end of the first inductor and one end of the second inductor are respectively connected with the second resonance component, and the other ends of the first inductor and the second inductor are both grounded;

the first resonant assembly is in series with the second resonant assembly.

In one embodiment, the first resonant assembly comprises: one end of the first resonator and one end of the second resonator are respectively connected with the first transmission line, the other end of the first resonator is connected with one end of the first capacitor, and the other end of the second resonator is connected with one end of the second capacitor;

the second resonant assembly includes: one end of the third resonator and one end of the fourth resonator are respectively connected with the second transmission line, the other end of the third resonator is connected with one end of the first inductor, and the other end of the fourth resonator is connected with one end of the second inductor;

the first transmission line and the second transmission line are connected in series.

In one embodiment, at least one of the first and second capacitances is an adjustable capacitance; the first inductor and the second inductor are non-adjustable inductors.

In one embodiment, the first and second capacitances are non-adjustable capacitances; at least one of the first inductor and the second inductor is an adjustable inductor.

In one embodiment, at least one of the first and second capacitors is an adjustable capacitor; at least one of the first inductor and the second inductor is an adjustable inductor.

The disclosed embodiment provides a filtering system, which includes:

a radio frequency transceiver, a power amplifier, a radio frequency dual-selection switch, a filter, a coupler, and an antenna as provided in any embodiment of the disclosure;

the radio frequency transceiver includes: the system comprises a receiving port, a sending port and a feedback receiving port;

the receiving port is connected with a first static contact of the radio frequency double-selection switch, and the transmitting port is connected with a second static contact of the radio frequency double-selection switch through the power amplifier;

one end of the filter is connected with a movable contact of the radio frequency double-selection switch, the other end of the filter is connected with an input port of the coupler, and an output port of the coupler is connected with the antenna; and the coupling port of the coupler is connected with the feedback receiving port.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the filter and the filtering system provided by the embodiment of the present disclosure pass through a low-pass filtering component and a high-pass filtering component, wherein the low-pass filtering component includes a first resonance component, a first capacitor and a second capacitor, and the high-pass filtering component includes: a second resonant component, a first inductance and a second inductance; at least one of the first capacitor, the second capacitor, the first inductor and the second inductor is an adjustable device; one ends of the first capacitor and the second capacitor are respectively connected with the first resonance component, and the other ends of the first capacitor and the second capacitor are both grounded; one ends of the first inductor and the second inductor are respectively connected with the second resonance component, and the other ends of the first inductor and the second inductor are both grounded; the first resonant assembly is connected in series with the second resonant assembly. The resonance frequency points corresponding to the resonance components are changed by adjusting the adjustable inductor or the adjustable capacitor, so that the working bandwidth range of the filter is controlled to adapt to the channel value of the current data transmission channel, the filter is used for filtering the data transmission signal, interference signals are suppressed, the number of the filters can be reduced, the filters are prevented from being switched back and forth, the insertion loss is reduced, and the communication quality of data transmission is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic diagram of a filter in one embodiment;

FIG. 2 is a schematic diagram of the structure of a filter in another embodiment;

FIG. 3 is a schematic diagram of a filter according to still another embodiment;

FIG. 4 is a schematic diagram of a filter in yet another embodiment;

FIG. 5 is a schematic diagram of a filter in yet another embodiment;

FIG. 6 is a schematic diagram of a filter in yet another embodiment;

FIG. 7 is a schematic diagram of a filtering system in one embodiment;

fig. 8 is a schematic diagram of a filtering system in another embodiment.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

Fig. 1 is a schematic structural diagram of a filter in an embodiment, and as shown in fig. 1, a filter 100 includes: a low pass filter assembly 10 and a high pass filter assembly 20, wherein the low pass filter assembly 10 includes a first resonant assembly 101, a first capacitor C1 and a second capacitor C2, and the high pass filter assembly 20 includes: a second resonant component 201, a first inductance L1 and a second inductance L2; at least one of the first capacitor C1, the second capacitor C2, the first inductor L1 and the second inductor L2 is an adjustable device; one ends of a first capacitor C1 and a second capacitor C2 are respectively connected with the first resonant assembly 101, and the other ends of the first capacitor C1 and the second capacitor C2 are both grounded; one ends of the first inductor L1 and the second inductor L2 are respectively connected with the second resonant assembly 201, and the other ends of the first inductor L1 and the second inductor L2 are both grounded; the first resonant assembly 101 is connected in series with the second resonant assembly 201.

In order to improve the communication quality of data transmission in a communication system, a filter is used for filtering a data transmission signal so as to suppress an interference signal, thereby ensuring the communication quality of the data transmission, but all the filters used at present are non-tunable filters, and the working bandwidth and the working frequency point of the filters are not controlled and cannot be changed, so that for data transmission in different frequency bands, the corresponding filter needs to be switched according to the channel value of a data transmission channel, thereby filtering the data transmission signal by using the filter so as to suppress the interference signal, but the problems of excessive filter quantity and large insertion loss exist in the existing non-tunable filters, the disclosed embodiment provides a filter, the resonant frequency point corresponding to a resonant component is changed by adjusting an adjustable inductor or an adjustable capacitor, so as to control the working bandwidth range of the filter, the method adapts to the channel value of the current data transmission channel, and then utilizes the filter to filter the data transmission signal, so as to inhibit interference signals, reduce the number of the filters, avoid switching the filters back and forth, reduce insertion loss and improve the communication quality of data transmission.

In one embodiment, as shown in fig. 1, the filter 100 includes a low pass filter assembly 10 and a high pass filter assembly 20, wherein the low pass filter assembly 10 includes a first resonant assembly 101, a first capacitor C1 and a second capacitor C2, and the high pass filter assembly 20 includes: a second resonant component 201, a first inductance L1 and a second inductance L2.

At least one of the first capacitor C1, the second capacitor C2, the first inductor L1 and the second inductor L2 is an adjustable device.

Specifically, the filter 100 determines the lower limit frequency of the working bandwidth thereof through the low-pass filter component 10, determines the upper limit frequency of the working bandwidth thereof through the high-pass filter component 20, and determines the working bandwidth range of the filter according to the lower limit frequency and the upper limit frequency, when the filter 100 receives the channel value of the current data transmission channel, the channel value is the preset bandwidth and the preset frequency point of the current data transmission channel, the preset frequency point is the frequency point within the preset bandwidth, and when the current filter 100 is determined to be unable to adapt to the channel value of the current data transmission channel, the resonance frequency point corresponding to the first resonance component 101 is changed by adjusting the first capacitor C1 and the second capacitor C2 in the low-pass filter component 10, on the other hand, the resonance corresponding to the second resonance component 201 is changed by adjusting the first inductor L1 and the second inductor L2 in the high-pass filter component 20, according to the changed resonance frequency point corresponding to the first resonance component 101 and the changed resonance frequency point corresponding to the second resonance component 201, the working bandwidth range of the filter 100 is adjusted, so that the working bandwidth range of the filter 100 is adapted to the channel value of the current data transmission channel, and then the current data transmission signal is filtered.

Illustratively, the filter 100 determines a lower limit frequency of an operating bandwidth thereof to be, for example, 2100MHz through the low-pass filter assembly 10, determines an upper limit frequency of the operating bandwidth thereof to be, for example, 2300MHz through the high-pass filter assembly 20, determines an operating bandwidth of the filter to be, for example, 2100MHz to 2300MHz according to the lower limit frequency 2100MHz and the upper limit frequency 2300MHz, determines that the operating bandwidth of the filter 100 to be, for example, 2300MHz to 2400MHz when the filter 100 receives a preset bandwidth of a current data transmission channel and a preset frequency point, determines that the operating bandwidth of the filter 100 to be 2100MHz to 2300MHz cannot adapt to the preset bandwidth of the current data transmission channel to be 2300MHz to 2400MHz, changes a resonance frequency point corresponding to the first resonance assembly 101 by adjusting the first capacitor C1 and the second capacitor C2 in the low-pass filter assembly 10, and, on the other hand, adjusts the first inductor L1 and the second inductor L2 in the high-pass filter assembly 20, changing the resonance frequency point corresponding to the second resonance component 201, and adjusting the working bandwidth range of the filter 100 from 2100MHz to 2300MHz to 2250MHz to 2450MHz according to the resonance frequency point corresponding to the changed first resonance component 101 and the resonance frequency point corresponding to the changed second resonance component 201, so that the working bandwidth range of the filter 100 can adapt to the channel value of the current data transmission channel, and then performing a filtering operation on the current data transmission signal, but not limited thereto, and the disclosure is not particularly limited thereto.

It should be noted that the operating bandwidth range of the filter 100 can cover the preset bandwidth range of the current data transmission channel, that is, the operating bandwidth range of the filter 100 is greater than the preset bandwidth range of the current data transmission channel.

Thus, the filter provided by this embodiment includes a low-pass filtering component and a high-pass filtering component by setting the filter, where the low-pass filtering component includes a first resonance component, a first capacitor, and a second capacitor, and the high-pass filtering component includes: a second resonant component, a first inductance and a second inductance; at least one of the first capacitor, the second capacitor, the first inductor and the second inductor is an adjustable device; one ends of the first capacitor and the second capacitor are respectively connected with the first resonance component, and the other ends of the first capacitor and the second capacitor are both grounded; one end of the first inductor and one end of the second inductor are respectively connected with the second resonance component, and the other ends of the first inductor and the second inductor are both grounded; the first resonant assembly is connected in series with the second resonant assembly. The adjustable inductor or the adjustable capacitor is adjusted, the resonance frequency point corresponding to the resonance component is changed, and therefore the working bandwidth range of the filter is controlled to be adaptive to the channel value of the current data transmission channel, the filter is used for filtering data transmission signals, interference signals are suppressed, the number of the filter can be reduced, the filter is prevented from being switched back and forth, insertion loss is reduced, and the communication quality of data transmission is improved.

As shown in fig. 1, on the basis of the above-described embodiment, in one embodiment of the present disclosure, the first resonance component 101 includes: a first transmission line 1011, a first resonator 1012, and a second resonator 1013.

One end of each of the first resonator 1012 and the second resonator 1013 is connected to the first transmission line 1011, the other end of the first resonator 1012 is connected to one end of the first capacitor C1, and the other end of the second resonator 1013 is connected to one end of the second capacitor C2.

The second resonator component 201 includes: a second transmission line 2011, a third resonator 2012 and a fourth resonator 2013.

One end of the third resonator 2012 and one end of the fourth resonator 2013 are respectively connected to the second transmission line 2011, the other end of the third resonator 2012 is connected to one end of the first inductor L1, and the other end of the fourth resonator 2013 is connected to one end of the second inductor L2.

The first transmission line 1011 and the second transmission line 2011 are connected in series.

Specifically, the filter 100 determines the lower limit frequency of the working bandwidth thereof through the low-pass filter component 10, determines the upper limit frequency of the working bandwidth thereof through the high-pass filter component 20, and determines the working bandwidth range of the filter according to the lower limit frequency and the upper limit frequency, when the filter 100 receives the channel value of the current data transmission channel and determines that the current filter 100 cannot adapt to the channel value of the current data transmission channel, the capacitance value of the first capacitor C1 in the low-pass filter component 10 is adjusted, the resonance frequency point corresponding to the first resonator 1012 is changed, the capacitance value of the second capacitor C2 is adjusted, the resonance frequency point corresponding to the second resonator 1013 is changed, on the other hand, the inductance value of the first inductor L1 in the high-pass filter component 20 is adjusted, the resonance frequency point corresponding to the third resonator 2012 is changed, the inductance value of the second inductor L2 is adjusted, the resonance frequency point corresponding to the fourth resonator 2013 is changed, and adjusting the working bandwidth range of the filter 100 according to the resonance frequency points corresponding to the changed first resonator 1012 and the changed second resonator 1013, and the resonance frequency points corresponding to the changed third resonator 2012 and the changed fourth resonator 2013, so that the working bandwidth range of the filter 100 is adapted to the channel value of the current data transmission channel, and further performing a filtering operation on the current data transmission signal.

Therefore, in the embodiment, the capacitance value of the adjustable capacitor and the inductance value of the adjustable inductor are adjusted, so that the resonance frequency point corresponding to the resonator is changed, the working bandwidth range of the filter is controlled, the filter is adapted to the channel value of the current data transmission channel, the filter is used for filtering the data transmission signal, interference signals are suppressed, the number of the filters can be reduced, the filters are prevented from being switched back and forth, the insertion loss is reduced, and the communication quality of data transmission is improved.

Optionally, on the basis of the foregoing embodiment, fig. 2 is a schematic structural diagram of a filter in another embodiment, and as shown in fig. 2, at least one of the first capacitor C1 and the second capacitor C2 is an adjustable capacitor; the first inductor L1 and the second inductor L2 are non-adjustable inductors.

Specifically, the first capacitor C1 is an adjustable capacitor, the second capacitor C2 is an unadjustable capacitor, and the first inductor L1 and the second inductor L2 are unadjustable inductors, but not limited thereto, and the disclosure is not limited thereto.

Illustratively, when the filter 100 receives a channel value of a current data transmission channel and it is determined that a working bandwidth range of the filter 100 cannot adapt to the channel value of the current data transmission channel, the capacitance value of the first capacitor C1 in the low-pass filtering component 10 is adjusted, the resonance frequency point corresponding to the first resonator 1012 in the first resonance component 101 is changed, and according to the changed resonance frequency point corresponding to the first resonator 1012, the lower limit frequency of the filter 100 is changed, that is, the working bandwidth range is changed, so that the working bandwidth range of the filter 100 adapts to the channel value of the current data transmission channel, and then the current data transmission signal is filtered.

Based on the above embodiments, in other embodiments of the present disclosure, fig. 3 is a schematic structural diagram of a filter in yet another embodiment, and as shown in fig. 3, the first capacitor C1 and the second capacitor C2 are adjustable capacitors, and the first inductor L1 and the second inductor L2 are non-adjustable inductors. But are not limited thereto, and the disclosure herein is not particularly limited.

Illustratively, the capacitance values of the first capacitor C1 and the second capacitor C2 are adjusted to change the resonance frequency point corresponding to the first resonator 1012 and the resonance frequency point corresponding to the second resonator 1013, and according to the changed resonance frequency point corresponding to the first resonator 1012 and the changed resonance frequency point corresponding to the second resonator 1013, the lower limit frequency of the filter 100 is changed, that is, the working bandwidth range of the filter is changed, so that the working bandwidth range of the filter 100 is adapted to the channel value of the current data transmission channel, and then the filtering operation is performed on the current data transmission channel.

Therefore, in the embodiment, the adjustable capacitor in the low-pass filtering component is changed, so that the working bandwidth range of the filter is controlled to adapt to the channel value of the current data transmission channel, the interference signal is suppressed by using the filter, the working bandwidth range of the filter can be controlled by only adjusting the low-pass filtering component flexibly, the operation is simplified, the insertion loss is reduced, and the communication quality of data transmission is improved.

Optionally, on the basis of the foregoing embodiment, fig. 4 is a schematic structural diagram of a filter in another embodiment, and as shown in fig. 4, the first capacitor C1 and the second capacitor C2 are non-adjustable capacitors; at least one of the first inductor L1 and the second inductor L2 is an adjustable inductor.

Specifically, the first capacitor C1 and the second capacitor C2 are non-adjustable capacitors, the first inductor L1 is an adjustable inductor, and the second inductor L2 is a non-adjustable inductor, but not limited thereto, and the disclosure is not limited thereto.

Illustratively, when the filter 100 receives a channel value of a current data transmission channel and it is determined that the working bandwidth range of the filter 100 cannot adapt to the channel value of the current data transmission channel, the inductance value of the first inductor L1 in the high-pass filtering component 20 is adjusted, the resonant frequency point corresponding to the third resonator 2012 included in the second resonant component 201 is changed, and according to the changed resonant frequency point corresponding to the third resonator 2012, the upper limit frequency of the filter 100 is changed, that is, the working bandwidth range thereof is changed, so that the working bandwidth range of the filter 100 adapts to the channel value of the current data transmission channel, and then the filtering operation is performed on the current data transmission signal.

Based on the foregoing embodiments, in other embodiments of the present disclosure, fig. 5 is a schematic structural diagram of a filter in yet another embodiment, and as shown in fig. 5, the first capacitor C1 and the second capacitor C2 are non-adjustable capacitors, and the first inductor L1 and the second inductor L2 are adjustable capacitors, but the present disclosure is not limited thereto.

Illustratively, by adjusting inductance values of the first inductor L1 and the second inductor L2, a resonance frequency point corresponding to the third resonator 2012 and a resonance frequency point corresponding to the fourth resonator 2013 in the second resonance component 201 are changed, and according to the changed resonance frequency point corresponding to the third resonator 2012 and the changed resonance frequency point corresponding to the fourth resonator 2013, an upper limit frequency of the filter 100 is changed, that is, a working bandwidth range of the filter 100 is changed, so that the working bandwidth range of the filter 100 is adapted to a channel value of a current data transmission channel, and then a filtering operation is performed on a current data transmission signal.

Therefore, in the embodiment, the adjustable inductor in the high-pass filtering component is changed, so that the working bandwidth range of the filter is controlled to adapt to the channel value of the current data transmission channel, the filter is used for suppressing the interference signal, the working bandwidth range of the filter can be controlled by only adjusting the high-pass filtering component flexibly, the operation is simplified, the insertion loss is reduced, and the communication quality of data transmission is improved.

Optionally, on the basis of the foregoing embodiment, fig. 6 is a schematic structural diagram of a filter in another embodiment, and as shown in fig. 6, at least one of the first capacitor C1 and the second capacitor C2 is an adjustable capacitor; at least one of the first inductor L1 and the second inductor L2 is an adjustable inductor.

Specifically, the first capacitor C1 is an adjustable capacitor, the second capacitor C2 is an unadjustable capacitor, the first inductor L1 is an adjustable inductor, and the second inductor L2 is an unadjustable inductor, but not limited thereto, and the disclosure is not limited thereto.

Illustratively, when the filter 100 receives the channel value of the current data transmission channel and it is determined that the operating bandwidth range of the filter 100 cannot be adapted to the channel value of the current data transmission channel, the capacitance value of the first capacitor C1 in the low-pass filter component 10 is adjusted, the resonant frequency point corresponding to the first resonator 1012 in the first resonant component 101 is changed, the inductance value of the first inductor L1 in the high-pass filter component 20 is adjusted, the resonant frequency point corresponding to the third resonator 2012 in the second resonant component 201 is changed, according to the changed resonance frequency point corresponding to the first resonator 1012 and the changed resonance frequency point corresponding to the third resonator 2012, the lower limit frequency and the upper limit frequency of the filter 100 are changed, i.e. changes its operating bandwidth range so that the operating bandwidth range of the filter 100 is adapted to the channel value of the current data transmission channel, thereby performing a filtering operation on the current data transmission signal.

Based on the foregoing embodiments, in other embodiments of the present disclosure, as shown in fig. 1, the first capacitor C1 and the second capacitor C2 are adjustable capacitors, and the first inductor L1 and the second inductor L2 are adjustable capacitors, but not limited thereto, and the present disclosure is not limited thereto, and the specific implementation process for adjusting the working bandwidth range of the filter by adjusting the first capacitor C1, the second capacitor C2, the first inductor L1, and the second inductor L2 is similar to that of the foregoing embodiment shown in fig. 1, and is not described herein again.

When the low-pass filter component 10 and the high-pass filter component 20 are adjusted simultaneously to change the lower limit frequency and the upper limit frequency corresponding to the filter 100, it is avoided that the lower limit frequency and the upper limit frequency of the filter 100 are changed simultaneously in the same frequency range, which results in the inability to change the operating bandwidth range of the filter.

In this way, in the embodiment, the adjustable capacitor in the low-pass filtering component and the adjustable inductor in the high-pass filtering component are simultaneously changed, so that the working bandwidth range of the filter is controlled to adapt to the channel value of the current data transmission channel, and then the interference signal is suppressed by using the filter, the insertion loss is reduced, and the communication quality of data transmission is improved.

On the basis of the foregoing embodiments, fig. 7 is a schematic diagram of a filtering system in an embodiment, and as shown in fig. 7, the filtering system 1000 includes: radio frequency transceiver 200, power amplifier 300, radio frequency dual-selection switch 400, filter 100, coupler 500, and antenna 600. The radio frequency transceiver 200 includes: a receive port R1, a transmit port TX, and a feedback receive port R2.

The receiving port R1 is connected to a first stationary contact of the rf dual-selection switch 400, and the transmitting port TX is connected to a second stationary contact of the rf dual-selection switch 400 through the power amplifier 300. One end of the filter 100 is connected to the moving contact of the rf dual-selection switch 400, the other end of the filter 100 is connected to the input port of the coupler 500, and the output port of the coupler 500 is connected to the antenna 600. The coupling port of the coupler 500 is connected to the feedback receiving port R2.

Specifically, the radio frequency transceiver 200 determines a channel value of a current data transmission channel according to a data transmission protocol corresponding to a frequency band of the current data transmission channel, and transmits the current data transmission signal to the power amplifier 300 through the transmission port TX, the power amplifier 300 amplifies the power of the current data transmission signal so that the signal can be transmitted farther, and outputs the power-amplified data transmission signal to the radio frequency double-selection switch 400, the radio frequency double-selection switch 400 is a single-pole double-throw switch and is controlled by the radio frequency transceiver 200, and whether a receiving line or a transmitting line is selected to be switched on is controlled according to a transmitting or receiving state of the current radio frequency transceiver 200; when the rf transceiver 200 is in the transmitting state, the power amplifier 300 is connected to the second stationary contact of the rf dual-selection switch 400, the filter 100 receives the current data transmission signal, i.e., the channel value of the current data transmission channel, upon determining that the current operating bandwidth range of the filter 100 is not adaptable to the channel value of the current data transmission channel, the operating bandwidth range of the filter 100 is adjusted, based on the received channel value of the current data transmission channel, to adapt to the channel value of the current data transmission channel, thereby performing a filtering operation and outputting the filtered data transmission signal to the input port of the coupler 500, to the antenna 600 through the output port of the coupler 500, energy of the data transmission signal is transmitted to a remote place through the antenna 600, and on the other hand, the coupling port of the coupler 500 detects power of the data transmission signal and feeds back the power to the feedback receiving port R2 of the rf transceiver 200.

On the basis of the above embodiment, the filter 100 includes: a low pass filter assembly 10 and a high pass filter assembly 20, wherein the low pass filter assembly 10 includes a first resonant assembly 101, a first capacitor C1 and a second capacitor C2, and the high pass filter assembly 20 includes: a second resonant component 201, a first inductance L1 and a second inductance L2. At least one of the first capacitor C1, the second capacitor C2, the first inductor L1 and the second inductor L2 is an adjustable device.

Thus, the present embodiment passes through the radio frequency transceiver, the power amplifier, the radio frequency dual-selection switch, the filter, the coupler, and the antenna. The radio frequency transceiver includes: a receive port, a transmit port, and a feedback receive port. The receiving port is connected with a first static contact of the radio frequency double-selection switch, and the transmitting port is connected with a second static contact of the radio frequency double-selection switch through the power amplifier. One end of the filter is connected with the movable contact of the radio frequency double-selection switch, the other end of the filter is connected with the input port of the coupler, and the output port of the coupler is connected with the antenna. The coupling port of the coupler is connected with the feedback receiving port. When the fact that the filter cannot cover the channel value of the current data transmission channel is determined, the working bandwidth range of the filter is adjusted to be suitable for the channel value of the current data transmission channel, interference signals are suppressed through the filter, the number of the filters can be reduced, the filters are prevented from being switched back and forth, insertion loss is reduced, and communication quality of data transmission is improved.

On the basis of the above embodiment, fig. 8 is a schematic diagram of a filtering system in another embodiment, and as shown in fig. 8, the first resonant assembly 101 includes: the resonator comprises a first transmission line 1011, a first resonator 1012 and a second resonator 1013, wherein one end of the first resonator 1012 and one end of the second resonator 1013 are respectively connected with the first transmission line 1011, the other end of the first resonator 1012 is connected with one end of a first capacitor C1, and the other end of the second resonator 1013 is connected with one end of a second capacitor C2. The second resonator component 201 includes: the resonator comprises a second transmission line 2011, a third resonator 2012 and a fourth resonator 2013, wherein one ends of the third resonator 2012 and the fourth resonator 2013 are respectively connected with the second transmission line 2011, the other end of the third resonator 2012 is connected with one end of a first inductor L1, and the other end of the fourth resonator 2013 is connected with one end of a second inductor L2. The first transmission line 1011 and the second transmission line 2011 are connected in series.

On the basis of the above embodiments, in other embodiments of the present disclosure, at least one of the first capacitor C1 and the second capacitor C2 is an adjustable capacitor; the first inductor L1 and the second inductor L2 are non-adjustable inductors.

Specifically, the first capacitor C1 is an adjustable capacitor, the second capacitor C2 is an unadjustable capacitor, and the first inductor L1 and the second inductor L2 are unadjustable inductors, but not limited thereto, and the specific implementation process for adjusting the working bandwidth range of the filter by adjusting the first capacitor C1 is similar to that of the embodiment shown in fig. 2, and is not repeated here.

Based on the above embodiments, in other embodiments of the present disclosure, the first capacitor C1 and the second capacitor C2 are adjustable capacitors, but are not limited thereto, and the present disclosure is not limited thereto, and the specific implementation process for adjusting the operating bandwidth range of the filter by adjusting the first capacitor C1 and the second capacitor C2 is similar to the above embodiment shown in fig. 3, and will not be described again here.

On the basis of the above embodiments, in other embodiments of the present disclosure, the first capacitor C1 and the second capacitor C2 are non-adjustable capacitors; at least one of the first inductor L1 and the second inductor L2 is an adjustable inductor.

Specifically, the first capacitor C1 and the second capacitor C2 are non-adjustable capacitors, the first inductor L1 is an adjustable inductor, and the second inductor L2 is a non-adjustable inductor, but not limited thereto, the disclosure is not limited thereto, and the specific implementation process for adjusting the working bandwidth range of the filter by adjusting the first inductor L1 is similar to the embodiment shown in fig. 4, and is not repeated here.

Based on the above embodiments, in other embodiments of the present disclosure, the first inductor L1 and the second inductor L2 are adjustable capacitors, but not limited thereto, and the present disclosure is not limited thereto, and the specific implementation process for adjusting the operating bandwidth range of the filter according to the adjustment of the first inductor L1 and the second inductor L2 is similar to the above embodiment shown in fig. 5, and is not described again here.

On the basis of the above embodiments, in other embodiments of the present disclosure, at least one of the first capacitor C1 and the second capacitor C2 is an adjustable capacitor; at least one of the first inductor L1 and the second inductor L2 is an adjustable inductor.

Specifically, the first capacitor C1 is an adjustable capacitor, the second capacitor C2 is an unadjustable capacitor, the first inductor L1 is an adjustable inductor, and the second inductor L2 is an unadjustable inductor, but not limited thereto, and the present disclosure is not limited thereto, and the specific implementation process for adjusting the working bandwidth range of the filter by adjusting the first capacitor C1 and the first inductor L1 is similar to the embodiment shown in fig. 6, and is not repeated here.

In other embodiments of the present disclosure, the first capacitor C1 and the second capacitor C2 are adjustable capacitors, and the first inductor L1 and the second inductor L2 are adjustable capacitors, but not limited thereto, and the present disclosure is not limited thereto, and the specific implementation process for adjusting the working bandwidth range of the filter by adjusting the first capacitor C1, the second capacitor C2, the first inductor L1, and the second inductor L2 is similar to the embodiment shown in fig. 1, and is not described herein again.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A filter, comprising:

the filter comprises a low-pass filter component and a high-pass filter component, wherein the low-pass filter component comprises a first resonance component, a first capacitor and a second capacitor, and the high-pass filter component comprises: a second resonant component, a first inductance and a second inductance; wherein at least one of the first capacitor, the second capacitor, the first inductor and the second inductor is an adjustable device;

one end of the first capacitor and one end of the second capacitor are respectively connected with the first resonance component, and the other ends of the first capacitor and the second capacitor are both grounded; one end of the first inductor and one end of the second inductor are respectively connected with the second resonance component, and the other ends of the first inductor and the second inductor are both grounded;

the first resonant assembly is in series with the second resonant assembly.

2. The filter of claim 1, wherein the first resonant component comprises: one end of the first resonator and one end of the second resonator are respectively connected with the first transmission line, the other end of the first resonator is connected with one end of the first capacitor, and the other end of the second resonator is connected with one end of the second capacitor;

the second resonant assembly includes: one end of the third resonator and one end of the fourth resonator are respectively connected with the second transmission line, the other end of the third resonator is connected with one end of the first inductor, and the other end of the fourth resonator is connected with one end of the second inductor;

the first transmission line and the second transmission line are connected in series.

3. The filter of claim 1 or 2, wherein at least one of the first capacitance and the second capacitance is an adjustable capacitance; the first inductor and the second inductor are non-adjustable inductors.

4. The filter of claim 1 or 2, wherein the first and second capacitors are non-tunable capacitors; at least one of the first inductor and the second inductor is an adjustable inductor.

5. The filter of claim 1 or 2, wherein at least one of the first and second capacitors is an adjustable capacitor; at least one of the first inductor and the second inductor is an adjustable inductor.

6. A filtering system, comprising:

a radio frequency transceiver, a power amplifier, a radio frequency dual-selection switch, a filter, a coupler, and an antenna according to any one of claims 1-5;

the radio frequency transceiver includes: the system comprises a receiving port, a sending port and a feedback receiving port;

the receiving port is connected with a first static contact of the radio frequency double-selection switch, and the transmitting port is connected with a second static contact of the radio frequency double-selection switch through the power amplifier;

one end of the filter is connected with a movable contact of the radio frequency double-selection switch, the other end of the filter is connected with an input port of the coupler, and an output port of the coupler is connected with the antenna; and the coupling port of the coupler is connected with the feedback receiving port.

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