CN113054344A

CN113054344A - Filter and communication equipment

Info

Publication number: CN113054344A
Application number: CN201911380980.1A
Authority: CN
Inventors: 张海峰; 蔡永宏; 唐梦军; 符其略
Original assignee: Shenzhen Tatfook Technology Co Ltd
Current assignee: Shenzhen Tatfook Technology Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2021-06-29

Abstract

The application discloses wave filter and communication equipment, this wave filter includes: a housing having a first direction and a second direction perpendicular to the first direction; the first filtering branch is arranged on the shell, consists of eleven filtering cavities which are sequentially coupled and forms three first cross coupling zeros; the first filtering branch and the second filtering branch are sequentially and adjacently arranged along a second direction, are formed by sequentially coupling eleven filtering cavities and form three second cross coupling zero points; the second filtering cavities to the seventh filtering cavities of the first filtering branch circuit and the second filtering cavities to the seventh filtering cavities of the second filtering branch circuit are divided into three rows arranged along the second direction. On one hand, the filtering branches are adjacently arranged, and part of the filtering cavities are divided into three rows arranged along the first direction, so that the arrangement among the filtering cavities is compact, and the volume of the filter can be reduced; on the other hand, zero point suppression is realized through the cross coupling zero point, and isolation among the filtering branches can be improved.

Description

Filter and communication equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a filter and a communications device.

Background

In a mobile communication system, a desired signal is modulated to form a modulated signal, the modulated signal is carried on a high-frequency carrier signal, the modulated signal is transmitted to the air through a transmitting antenna, the signal in the air is received through a receiving antenna, and the signal received by the receiving antenna does not include the desired signal but also includes harmonics and noise signals of other frequencies. The signal received by the receiving antenna needs to be filtered by a filter to remove unnecessary harmonic and noise signals. Therefore, the designed filter must precisely control the bandwidth of the signal. And if multiple channels exist, the high isolation between the pass bands of the channels should be considered.

The inventor of the present application finds, in long-term research and development work, that a filter in the prior art generally includes two or more groups of filter branches with different frequencies, but different filter branches are not adjacently arranged, and filters between different filter branches are not arranged in blocks, so that the problem that the size of the existing filter is too large is caused, and particularly when more filter branches are involved, the problem is particularly serious; moreover, when a plurality of filtering branches exist at the same time, the performance of the filter, such as out-of-band rejection, is poor, and it is difficult to achieve high isolation between channel signals of different filtering branches.

Disclosure of Invention

The present application provides a filter and a communication device to solve the above problems.

In order to solve the technical problem, the application adopts a technical scheme that: there is provided a filter comprising: a housing having a first direction and a second direction perpendicular to the first direction; the first filtering branch is arranged on the shell and consists of eleven filtering cavities which are sequentially coupled, and the eleven filtering cavities of the first filtering branch form three first cross-coupling zero points; the first filtering branch and the second filtering branch are sequentially and adjacently arranged along a second direction and are formed by eleven sequentially-coupled filtering cavities, and eleven filtering cavities of the second filtering branch form three second cross-coupling zero points; the second filtering cavities to the seventh filtering cavities of the first filtering branch circuit and the second filtering cavities to the seventh filtering cavities of the second filtering branch circuit are divided into three rows arranged along the second direction. The first filtering branch and the second filtering branch are sequentially arranged along the second direction, and the filtering cavities of the first filtering branch are roughly divided into three rows which are regularly arranged along the second direction, so that gaps among the filtering cavities can be reduced, the structure of the filter is more compact, and the size of the filter is further reduced.

Furthermore, a second filter cavity of the first filter branch is arranged close to the middle branching line of the shell in the second direction relative to the first filter cavity of the first filter branch; the second filtering cavity, the third filtering cavity, the fourth filtering cavity and the sixth filtering cavity of the first filtering branch are in a row and are sequentially arranged along a first direction; the fifth filtering cavities and the seventh filtering cavities of the first filtering branch are in a row and are sequentially arranged along the first direction; the ninth filtering cavity, the tenth filtering cavity and the eleventh filtering cavity of the first filtering branch are in a row and are sequentially arranged along the first direction; the eighth filtering cavity of the first filtering branch is far away from the middle branching line of the shell in the second direction relative to the seventh filtering cavity of the first filtering branch, and the sixth filtering cavity to the eighth filtering cavity of the first filtering branch are arranged in a triangular shape; the ninth filtering cavity of the first filtering branch is arranged close to the middle branching line of the shell in the second direction relative to the eighth filtering cavity of the first filtering branch, and the seventh filtering cavity to the ninth filtering cavity of the first filtering branch are arranged in a triangular shape; the first filter cavity and the second filter cavity of the first filter branch are arranged at intervals, the third filter cavity of the first filter branch is respectively adjacent to the second filter cavity and the fourth filter cavity of the first filter branch, the sixth filter cavity of the first filter branch is respectively adjacent to the fourth filter cavity, the fifth filter cavity and the seventh filter cavity of the first filter branch, the eighth filter cavity of the first filter branch is respectively adjacent to the seventh filter cavity and the ninth filter cavity of the first filter branch, and the tenth filter cavity of the first filter branch is respectively adjacent to the ninth filter cavity and the eleventh filter cavity of the first filter branch. The adjacent setting between the passing filtering wave cavity can further reduce the clearance between the filtering wave cavity, and then further reduce the volume of wave filter.

The fourth filter cavity and the sixth filter cavity of the first filter branch are respectively in capacitive cross coupling, the sixth filter cavity and the eighth filter cavity of the first filter branch are respectively in inductive cross coupling, and the ninth filter cavity and the eleventh filter cavity of the first filter branch are respectively in inductive cross coupling, so that three first cross coupling zeros are formed. Zero point suppression is realized through the cross coupling zero point, and the isolation between different filtering branches is improved.

Furthermore, a second filter cavity of the second filter branch is far away from the housing in the middle branching line in the second direction relative to the first filter cavity of the second filter branch; the second filtering cavity, the fourth filtering cavity, the sixth filtering cavity and the seventh filtering cavity of the second filtering branch are in a row and are sequentially arranged along the first direction; the third filtering cavities and the fifth filtering cavities of the second filtering branch are in a row and are sequentially arranged along the first direction; the ninth filtering cavity, the tenth filtering cavity and the eleventh filtering cavity of the second filtering branch are in a row and are sequentially arranged along the first direction; an eighth filter cavity of the second filter branch is far away from the middle branching point of the shell in the second direction relative to a seventh filter cavity of the second filter branch, a ninth filter cavity of the second filter branch is far away from the middle branching point of the shell in the second direction relative to the eighth filter cavity of the second filter branch, and the seventh filter cavity to the ninth filter cavity of the second filter branch are arranged in a triangular shape; the second filter cavity of the second filter branch is arranged at an interval with the first filter cavity of the second filter branch, the third filter cavity of the second filter branch is respectively arranged adjacent to the second filter cavity, the fourth filter cavity and the fifth filter cavity of the second filter branch, the third filter cavity of the second filter branch is respectively arranged adjacent to the second filter cavity and the third filter cavity of the first filter branch, the sixth filter cavity of the second filter branch is respectively arranged adjacent to the fourth filter cavity and the seventh filter cavity of the second filter branch, the eighth filter cavity of the second filter branch is respectively arranged at an interval with the seventh filter cavity and the ninth filter cavity of the second filter branch and is arranged at an interval with the eighth filter cavity and the ninth filter cavity of the first filter branch, and the tenth filter cavity of the second filter branch is respectively arranged adjacent to the ninth filter cavity and the eleventh filter cavity of the second filter branch. The filter cavities of the second filter branch circuit are roughly divided into three rows which are regularly arranged along the second direction, and part of the filter cavities of the second filter branch circuit and part of the filter cavities of the first filter branch circuit are positioned in the same row, so that the filter cavities of the first filter branch circuit and the second filter branch circuit are arranged in a block, the gap between the filter cavities can be reduced, the structure of the filter is more compact, and the size of the filter is reduced. The adjacent setting between the passing filtering wave cavity can further reduce the clearance between the filtering wave cavity, and then further reduce the volume of wave filter.

And the fourth filter cavity and the sixth filter cavity of the second filter branch are in capacitive cross coupling, the second filter cavity and the fourth filter cavity of the second filter branch are in inductive cross coupling, and the ninth filter cavity and the eleventh filter cavity of the second filter branch are in inductive cross coupling, so that three second cross coupling zeros are formed. Zero point suppression is realized through the cross coupling zero point, and the isolation between different filtering branches is improved.

The embodiment of the application at least has the following beneficial effects: on one hand, the filtering branches are adjacently arranged, and part of the filtering cavities are divided into three rows arranged along the first direction, so that the arrangement among the filtering cavities is compact, and the volume of the filter can be reduced; on the other hand, zero point suppression is realized through the cross coupling zero point, and isolation among the filtering branches can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first embodiment of a filter provided in the present application;

FIG. 2 is a schematic diagram of a topology of a first filtering branch of a filter provided in the present application

Fig. 3 is a schematic diagram of a topology of a second filtering branch of the filter provided in the present application;

FIG. 4 is a schematic diagram of a second embodiment of a filter provided herein;

FIG. 5 is a schematic diagram of a filter cavity intersection provided herein;

fig. 6 is a schematic structural diagram of a third embodiment of the filter provided in the present application;

FIG. 7 is a diagram illustrating simulation results of a filter provided herein;

FIG. 8 is a diagram illustrating simulation results of a filter provided herein;

fig. 9 is a schematic diagram of an embodiment of a communication device provided herein.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.

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

Please refer to fig. 1, which is a schematic structural diagram of a filter 10 according to a first embodiment of the present application.

As shown in fig. 1, the filter 10 of the present embodiment includes: a housing 210 having a first direction d1 and a second direction d2 perpendicular to the first direction d 1; the first filtering branch 101 is arranged on the shell 210 and consists of eleven filtering cavities which are sequentially coupled, and the eleven filtering cavities of the first filtering branch 101 form three first cross-coupling zeros; the first filtering branch 101 and the second filtering branch 102 are sequentially and adjacently arranged along a second direction d2 and are composed of eleven sequentially coupled filtering cavities, and the eleven filtering cavities of the second filtering branch 102 form three second cross-coupling zero points; the second to seventh filter cavities a2 to a7 of the first filter branch 101 and the second to seventh filter cavities a2 to a7 of the second filter branch 102 are divided into three columns arranged along the second direction d 2.

Preferably, in this embodiment, the sizes of the first filter cavity a1 to the seventh filter cavity a7 of the first filter branch 101 and the second filter branch 102 are all equal, and the sizes of the eighth filter cavity A8 to the eleventh filter cavity a11 of the first filter branch 101 and the second filter branch 102 are all equal.

Among them, it should be noted that: the coupling zero point is also called as transmission zero point, so that zero point suppression can be realized, and the debugging index is convenient. The transmission zero is the transmission function of the filter 10 equal to zero, that is, the electromagnetic energy at the frequency point corresponding to the transmission zero cannot pass through the network, so that the complete isolation effect is achieved, the suppression effect on the signals outside the passband is achieved, and the high isolation among a plurality of passbands can be better achieved.

Moreover, it should be noted that parameters (such as frequency point and suppression) of two or more coupling zeros of the present application may be the same; in the simulation diagram, the coupling zeros of the same parameters are shown as the same coupling zeros.

The first filtering branch 101 and the second filtering branch 102 are arranged in sequence along the second direction d2, so that the first filtering branch 101 and the second filtering branch 102 are arranged closely; in addition, the filter cavities of different filter branches are tightly arranged in blocks by dividing the second filter cavity a 2-the seventh filter cavity a7 of the first filter branch 101 and the second filter cavity a 2-the seventh filter cavity a7 of the second filter branch 102 into three columns arranged along the second direction d 2; therefore, the arrangement between the filtering branches and the filtering cavities can be tight through the arrangement of the filtering branches and the filtering cavities, so that the cavity arrangement of the filter 10 is compact, and the size of the filter 10 can be reduced. On the other hand, the first filtering branch 101 and the second filtering branch 102 both form a cross-coupling zero point, and zero point suppression can be realized through the cross-coupling zero point, so even if the two filtering branches are closely arranged, zero point suppression can be realized through the cross-coupling zero point, and further, the isolation between different filtering branches is improved.

The eleven filter cavities of the first filter branch 101 are specifically the first filter cavity a1 through the eleventh filter cavity a11 of the first filter branch 101.

Specifically, referring to fig. 1, the second filter cavity a2 of the first filter branch 101 is disposed close to the middle line of the housing 210 in the second direction d2 relative to the first filter cavity a1 of the first filter branch 101; the second filtering cavity a2, the third filtering cavity A3, the fourth filtering cavity a4 and the sixth filtering cavity a6 of the first filtering branch 101 are in a row and are sequentially arranged along a first direction d 1; the fifth filtering cavity a5 and the seventh filtering cavity a7 of the first filtering branch 101 are in a row and are sequentially arranged along the first direction d 1; the ninth filtering cavity a9, the tenth filtering cavity a10 and the eleventh filtering cavity a11 of the first filtering branch 101 are in a row and are sequentially arranged along the first direction d 1; the eighth filter cavity A8 of the first filter branch 101 is disposed away from the bisector of the housing 210 in the second direction d2 with respect to the seventh filter cavity a7 of the first filter branch 101, and the sixth filter cavity a6 to the eighth filter cavity A8 of the first filter branch 101 are disposed in a triangle; the ninth filtering cavity a9 of the first filtering branch 101 is disposed close to the bisector of the housing 210 in the second direction d2 relative to the eighth filtering cavity A8 of the first filtering branch 101, and the seventh filtering cavity a7 to the ninth filtering cavity a9 of the first filtering branch 101 are disposed in a triangle; the first filter cavity a1 and the second filter cavity a2 of the first filter branch 101 are arranged at intervals, the third filter cavity A3 of the first filter branch 101 is respectively arranged adjacent to the second filter cavity a2 and the fourth filter cavity a4 of the first filter branch 101, the sixth filter cavity A6 of the first filter branch 101 is respectively arranged adjacent to the fourth filter cavity a4, the fifth filter cavity a5 and the seventh filter cavity a7 of the first filter branch 101, the eighth filter cavity A8 of the first filter branch 101 is respectively arranged adjacent to the seventh filter cavity a7 and the ninth filter cavity a9 of the first filter branch 101, and the tenth filter cavity a10 of the first filter branch 101 is respectively arranged adjacent to the ninth filter cavity a9 and the eleventh filter cavity a11 of the first filter branch 101.

Furthermore, the first filter chamber a1 of the first filter branch 101 is located away from the median line of the housing 210 in the second direction d2 with respect to the second filter chamber a2 of the first filter branch 101, and the angle formed by the connecting line between the center of the first filter cavity a1 and the center of the second filter cavity a2 of the first filter branch 101 and the connecting line between the center of the second filter cavity a2 and the center of the third filter cavity A3 of the first filter branch 101 is larger than 145 degrees and smaller than 180 degrees, the eighth filter cavity A8 of the first filter branch 101 is far away from the median line of the housing 210 in the second direction d2 relative to the seventh filter cavity a7 of the first filter branch 101, and the connecting line between the center of the seventh filter cavity a7 and the center of the eighth filter cavity A8 of the first filter branch 101 forms an included angle larger than 145 degrees and smaller than 180 degrees with the connecting line between the center of the fifth filter cavity a5 and the center of the seventh filter cavity a7 of the first filter branch 101.

The first filtering branch 101 and the second filtering branch 102 are sequentially arranged along the second direction d2, and the filtering cavities of the first filtering branch 101 are substantially divided into three rows regularly arranged along the second direction d2, so that the gap between the filtering cavities can be reduced, the structure of the filter 10 is more compact, and the size of the filter 10 is further reduced. By adjacent arrangement of the filter cavities, the gap between the filter cavities can be further reduced, thereby further reducing the volume of the filter 10.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating a topology of a first filtering branch 101 of the filter 10 according to the present application.

As shown in fig. 2, the fourth filter cavity a4 and the sixth filter cavity a6 of the first filter branch 101 are capacitively cross-coupled, respectively, and the sixth filter cavity a6 and the eighth filter cavity A8 of the first filter branch 101 and the ninth filter cavity a9 and the eleventh filter cavity a11 of the first filter branch 101 are inductively cross-coupled, respectively, to form three first cross-coupling zeros.

Three first cross coupling zero points are formed, zero point suppression is achieved, and isolation among different filtering branches is further improved.

More specifically, a common capacitive cross-coupling element may be a flying rod, that is, a flying rod is disposed between the fourth filter cavity a4 and the sixth filter cavity a6 of the first filter branch 101, so that the capacitive cross-coupling between the fourth filter cavity a4 and the sixth filter cavity a6 of the first filter branch 101 is equivalent to C1 shown in fig. 2.

More specifically, windows may be disposed between the sixth filter cavity a6 and the eighth filter cavity A8 of the first filter branch 101, between the ninth filter cavity a9 and the eleventh filter cavity a11 of the first filter branch 101, and metal coupling ribs are disposed on the windows, so that inductive cross coupling is achieved between the sixth filter cavity a6 and the eighth filter cavity A8 of the first filter branch 101, and between the ninth filter cavity a9 and the eleventh filter cavity a11 of the first filter branch 101, and an inductive cross coupling zero is formed, which is equivalent to the inductances L1 and L2 shown in fig. 2.

The inductive cross coupling is realized by the metal coupling rib, and the metal coupling rib is slightly changed by the external temperature so as to prevent the filter 10 from generating temperature drift.

Further, the filter 10 further includes a port L1 coupled to the second filter cavity a2 of the first filter branch 101, and a first port (not shown) coupled to the eleventh filter cavity a11 of the first filter branch 101, wherein the port L1 and the first port may be taps of the filter 10.

The first resonant frequencies of the first filter cavity a1 of the first filter branch 101 to the eleventh filter cavity a11 of the first filter branch 101 are sequentially in the following ranges:

3500Mhz-3502Mhz、3493Mhz-3495Mhz、3491Mhz-3493Mhz、3514Mhz-3516Mhz、3498Mhz-3500Mhz、3557Mhz-3559Mhz、3500Mhz-3502Mhz、3507Mhz-3507Mhz、3421Mhz-3423Mhz、3493Mhz-3493Mhz、3610Mhz-3612Mhz。

a coupling bandwidth between a filter cavity of the first filter branch 101 and the second filter cavity a2 of the first filter branch 101, a coupling bandwidth between the port L1 and the second filter cavity a2 of the first filter branch 101, a coupling bandwidth between the second filter cavity a2 of the first filter branch 101 and the third filter cavity A3 of the first filter branch 101, a coupling bandwidth between the third filter cavity A3 of the first filter branch 101 and the fourth filter cavity A4 of the first filter branch 101, a coupling bandwidth between the fourth filter cavity A4 of the first filter branch 101 and the fifth filter cavity A5 of the first filter branch 101, a coupling bandwidth between the fourth filter cavity A4 of the first filter branch 101 and the sixth filter cavity A6 of the first filter branch 101, A5 of the fifth filter cavity A5 of the first filter branch 101 and the sixth filter cavity a 383 of the first filter branch 101, a coupling bandwidth between the sixth filter cavity a 73742 of the first filter branch 101 and the seventh filter cavity a 4642 of the first filter branch 101, The coupling bandwidth between the sixth filter cavity a6 of the first filter branch 101 and the eighth filter cavity A8 of the first filter branch 101, the coupling bandwidth between the seventh filter cavity a7 of the first filter branch 101 and the eighth filter cavity A8 of the first filter branch 101, the coupling bandwidth between the eighth filter cavity A8 of the first filter branch 101 and the ninth filter cavity a9 of the first filter branch 101, the coupling bandwidth between the ninth filter cavity a9 of the first filter branch 101 and the tenth filter cavity a10 of the first filter branch 101, the coupling bandwidth between the ninth filter cavity a9 of the first filter branch 101 and the eleventh filter cavity a11 of the first filter branch 101, the coupling bandwidth between the tenth filter cavity a10 of the first filter branch 101 and the eleventh filter cavity a11 of the first filter branch 101, and the first coupling bandwidth between the eleventh filter cavity a11 and the first port of the first filter branch 101 are respectively in the following ranges:

65Mhz-77Mhz、289Mhz-326Mhz、191Mhz-217Mhz、110Mhz-127Mhz、62Mhz-74Mhz、-88Mhz--77Mhz、56Mhz-67Mhz、78Mhz-91Mhz、52Mhz-63Mhz、80Mhz-93Mhz、99Mhz-115Mhz、70Mhz-83Mhz、-115Mhz--99Mhz、121Mhz-139Mhz、199Mhz-226Mhz。

therefore, the bandwidth of the first filtering branch 101 can be within 3396-3603MHz, and the design requirement is met.

The resonant frequencies and coupling bandwidths described above are not limited to these, for example, in some other embodiments:

the second resonant frequencies of the first filter cavity a1 of the first filter branch 101 to the eleventh filter cavity a11 of the first filter branch 101 are sequentially in the following ranges:

2655Mhz-2657Mhz、2589Mhz-2591Mhz、2588Mhz-2590Mhz、2544Mhz-2546Mhz、2593Mhz-2595Mhz、2623Mhz-2625Mhz、2595Mhz-2597Mhz、2599Mhz-2601Mhz、2526Mhz-2528Mhz、2590Mhz-2592Mhz、2699Mhz-2701Mhz。

a coupling bandwidth between the first cavity a1 of the first filtering branch 101 and the second cavity a2 of the first filtering branch 101, a coupling bandwidth between the port L1 and the second cavity a2 of the first filtering branch 101, a coupling bandwidth between the second cavity a2 of the first filtering branch 101 and the third cavity A3 of the first filtering branch 101, a coupling bandwidth between the third cavity A3 of the first filtering branch 101 and the fourth cavity A4 of the first filtering branch 101, a coupling bandwidth between the fourth cavity A4 of the first filtering branch 101 and the fifth cavity A5 of the first filtering branch 101, a coupling bandwidth between the fourth cavity A4 of the first filtering branch 101 and the sixth cavity A6 of the first filtering branch 101, a coupling bandwidth between the fifth cavity A5 of the first filtering branch 101 and the sixth cavity a 86545 of the first filtering branch 101, a coupling bandwidth between the fifth cavity A5 of the first filtering branch 101 and the sixth cavity a 828945 of the first filtering branch 101, and A7 of the sixth cavity a 8225 of the first filtering branch 101, The coupling bandwidth between the sixth filter cavity a6 of the first filter branch 101 and the eighth filter cavity A8 of the first filter branch 101, the coupling bandwidth between the seventh filter cavity a7 of the first filter branch 101 and the eighth filter cavity A8 of the first filter branch 101, the coupling bandwidth between the eighth filter cavity A8 of the first filter branch 101 and the ninth filter cavity a9 of the first filter branch 101, the coupling bandwidth between the ninth filter cavity a9 of the first filter branch 101 and the tenth filter cavity a10 of the first filter branch 101, the coupling bandwidth between the ninth filter cavity a9 of the first filter branch 101 and the eleventh filter cavity a11 of the first filter branch 101, the coupling bandwidth between the tenth filter cavity a10 of the first filter branch 101 and the eleventh filter cavity a11 of the first filter branch 101, and the second coupling bandwidth between the eleventh filter cavity a11 and the first port of the first filter branch 101 are respectively in the following ranges:

139Mhz-159Mhz、385Mhz-432Mhz、195Mhz-221Mhz、89Mhz-104Mhz、65Mhz-77Mhz、-51Mhz--44Mhz、61Mhz-73Mhz、70Mhz-82Mhz、25Mhz-32Mhz、71Mhz-84Mhz、79Mhz-92Mhz、47Mhz-57Mhz、-99Mhz--87Mhz、81Mhz-95Mhz、139Mhz-159Mhz。

therefore, the bandwidth of the first filtering branch 101 can be made to be within 2513-2678MHz, and the design requirement is met.

The eleven filter cavities of the second filter branch 102 are specifically the first filter cavity B1 through the eleventh filter cavity B11 of the second filter branch 102.

In particular, as shown in fig. 1, second filter cavity B2 of second filter branch 102 is disposed away from the midline of housing 210 in second direction d2 with respect to first filter cavity B1 of second filter branch 102; the second filtering cavity B2, the fourth filtering cavity B4, the sixth filtering cavity B6 and the seventh filtering cavity B7 of the second filtering branch 102 are in a row and are sequentially arranged along the first direction d 1; the third filter cavity B3 and the fifth filter cavity B5 of the second filter branch 102 are in a row and are sequentially arranged along the first direction d 1; the ninth filtering cavity B9, the tenth filtering cavity B10 and the eleventh filtering cavity B11 of the second filtering branch 102 are in a row and are sequentially arranged along the first direction d 1; the eighth filter cavity B8 of the second filter branch 102 is located away from the bisector of the housing 210 in the second direction d2 with respect to the seventh filter cavity B7 of the second filter branch 102, the ninth filter cavity B9 of the second filter branch 102 is located away from the bisector of the housing 210 in the second direction d2 with respect to the eighth filter cavity B8 of the second filter branch 102, and the seventh filter cavity B7 to the ninth filter cavity B9 of the second filter branch 102 are arranged in a triangular shape; the second filter cavity B2 of the second filter branch 102 and the first filter cavity B1 of the second filter branch 102 are disposed at an interval, the third filter cavity B3 of the second filter branch 102 is disposed adjacent to the second filter cavity B2, the fourth filter cavity B4 and the fifth filter cavity B5 of the second filter branch 102, the third filter cavity B3 of the second filter branch 102 is disposed adjacent to the second filter cavity a2 and the third filter cavity A3 of the first filter branch 101, the sixth filter cavity B6 of the second filter branch 102 is disposed adjacent to the fourth filter cavity B4 and the seventh filter cavity B7 of the second filter branch 102, the eighth filter cavity B8 of the second filter branch 102 is disposed adjacent to the seventh filter cavity B7 and the ninth filter cavity B9 of the second filter branch 102, the eighth filter cavity B638 of the first filter branch 101 and the ninth filter cavity B9 of the second filter branch 102, the ninth filter cavity B638 and the ninth filter cavity B9 of the first filter branch 102 are disposed at an interval, The eleventh filter chamber B11 is adjacently disposed.

Furthermore, the first filter cavity B1 of the second filter branch 102 is arranged adjacent to the first filter branch 101 in the second direction d2 with respect to the second filter cavity B2 of the second filter branch 102, and the angle formed by the connecting line between the center of the first filter cavity B1 and the center of the second filter cavity B2 of the second filter branch 102 and the connecting line between the center of the second filter cavity B2 and the center of the fourth filter cavity B4 of the second filter branch 102 is greater than 145 ° and less than 180 °, the eighth filter cavity B8 of the second filter branch 102 is disposed away from the first filter branch 101 in the second direction d2 with respect to the seventh filter cavity B7 of the second filter branch 102, an included angle formed by a connecting line between the center of the seventh filtering cavity B7 and the center of the eighth filtering cavity B8 of the second filtering branch 102 and a connecting line between the center of the sixth filtering cavity B6 and the center of the seventh filtering cavity B7 of the second filtering branch 102 is more than 145 degrees and less than 180 degrees; and the spacing distance between the first filter cavity B1 and the second filter cavity B2 of the second filter branch 102 is greater than the spacing distance between the first filter cavity a1 and the second filter cavity BA2 of the first filter branch 101.

The filter cavities of the second filter branch 102 are roughly divided into three rows regularly arranged along the second direction d2, and a part of the filter cavities of the second filter branch 102 and a part of the filter cavities of the first filter branch 101 are located in the same row, so that the filter cavities of the first filter branch 101 and the second filter branch 102 are arranged in a block, the gap between the filter cavities can be reduced, the structure of the filter 10 is more compact, and the size of the filter 10 is further reduced. By adjacent arrangement of the filter cavities, the gap between the filter cavities can be further reduced, thereby further reducing the volume of the filter 10.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating a topology of the second filtering branch 102 of the filter 10 according to the present application.

As shown in fig. 3, the fourth filter cavity B4 and the sixth filter cavity B6 of the second filter branch 102 are capacitively cross-coupled, the second filter cavity B2 and the fourth filter cavity B4 of the second filter branch 102 are inductively cross-coupled, and the ninth filter cavity B9 and the eleventh filter cavity B11 of the second filter branch 102 are inductively cross-coupled, respectively, to form three second cross-coupling zeros.

More specifically, the fourth filtering cavity B4 and the sixth filtering cavity B6 of the second filtering branch 102 are cross-coupled by flying bars, and the inductive cross-coupling is realized by opening windows between the second filtering cavity B2 and the fourth filtering cavity B4 of the second filtering branch 102 and between the ninth filtering cavity B9 and the eleventh filtering cavity B11 of the second filtering branch 102 and further providing metal coupling ribs, which is described in detail above and is not described again.

Further, the filter 10 further includes a port L2 coupled to the second filter cavity B2 of the second filter branch 102, and a first port (not shown) coupled to the eleventh filter cavity B11 of the second filter branch 102, wherein the port L2 and the first port may be taps of the filter 10.

The first resonant frequencies of the first filter cavity B1 of the second filter branch 102 to the eleventh filter cavity B11 of the second filter branch 102 are sequentially in the following ranges:

3511Mhz-3513Mhz、3569Mhz-3571Mhz、3483Mhz-3485Mhz、3404Mhz-3406Mhz、3496Mhz-3498Mhz、3499Mhz-3501Mhz、3498Mhz-3500Mhz、3506Mhz-3508Mhz、3421Mhz-3423Mhz、3492Mhz-3494Mhz、3610Mhz-3612Mhz。

a coupling bandwidth between a filter cavity of the second filter branch 102 and the second filter cavity B2 of the second filter branch 102, a coupling bandwidth between the port L1 and the second filter cavity B2 of the second filter branch 102, a coupling bandwidth between the second filter cavity B2 of the second filter branch 102 and the third filter cavity B3 of the second filter branch 102, a coupling bandwidth between the second filter cavity B2 of the second filter branch 102 and the fourth filter cavity B4 of the second filter branch 102, a coupling bandwidth between the third filter cavity B3 of the second filter branch 102 and the fourth filter cavity B4 of the second filter branch 102, a coupling bandwidth between the fourth filter cavity B4 of the second filter branch 102 and the fifth filter cavity B5 of the second filter branch 102, a coupling bandwidth between the fourth filter cavity B4 of the second filter branch 102 and the sixth filter cavity B383 of the second filter branch 102, a coupling bandwidth between the fifth filter cavity B7342 of the second filter branch 102 and the sixth filter cavity B5 of the second filter branch 102, The coupling bandwidth between the sixth filter cavity B6 of the second filter branch 102 and the seventh filter cavity B7 of the second filter branch 102, the coupling bandwidth between the seventh filter cavity B7 of the second filter branch 102 and the eighth filter cavity B8 of the second filter branch 102, the coupling bandwidth between the eighth filter cavity B8 of the second filter branch 102 and the ninth filter cavity B9 of the second filter branch 102, the coupling bandwidth between the ninth filter cavity B9 of the second filter branch 102 and the tenth filter cavity B10 of the second filter branch 102, the coupling bandwidth between the ninth filter cavity B9 of the second filter branch 102 and the eleventh filter cavity B11 of the second filter branch 102, the coupling bandwidth between the tenth filter cavity B10 of the second filter branch 102 and the eleventh filter cavity B11 of the second filter branch 102, and the first coupling bandwidth between the eleventh filter cavity B11 and the first port of the second filter branch 102 are respectively in the following ranges:

69Mhz-81Mhz、302Mhz-340Mhz、149Mhz-170Mhz、120Mhz-138Mhz、73Mhz-86Mhz、53Mhz-64Mhz、-100Mhz--88Mhz、41Mhz-50Mhz、95Mhz-110Mhz、95Mhz-110Mhz、100Mhz-116Mhz、70Mhz-83Mhz、-113Mhz--100Mhz、121Mhz-139Mhz、199Mhz-226Mhz。

therefore, the bandwidth of the second filtering branch 102 can be within 3396-3603MHz, and the design requirement is met.

In some other embodiments:

the second resonant frequencies of the first filter cavity B1 of the second filter branch 102 and the eleventh filter cavity B11 of the second filter branch 102 are sequentially in the following ranges:

2659Mhz-2661Mhz、2628Mhz-2630Mhz、2581Mhz-2583Mhz、2543Mhz-2545Mhz、2593Mhz-2595Mhz、2594Mhz-2596Mhz、2595Mhz-2597Mhz、2599Mhz-2601Mhz、2527Mhz-2529Mhz、2592Mhz-2594Mhz2698Mhz-2700Mhz。

a coupling bandwidth between a filter cavity of the second filter branch 102 and the second filter cavity B2 of the second filter branch 102, a coupling bandwidth between the port L1 and the second filter cavity B2 of the second filter branch 102, a coupling bandwidth between the second filter cavity B2 of the second filter branch 102 and the third filter cavity B3 of the second filter branch 102, a coupling bandwidth between the second filter cavity B2 of the second filter branch 102 and the fourth filter cavity B4 of the second filter branch 102, a coupling bandwidth between the third filter cavity B3 of the second filter branch 102 and the fourth filter cavity B4 of the second filter branch 102, a coupling bandwidth between the fourth filter cavity B4 of the second filter branch 102 and the fifth filter cavity B5 of the second filter branch 102, a coupling bandwidth between the fourth filter cavity B4 of the second filter branch 102 and the sixth filter cavity B383 of the second filter branch 102, a coupling bandwidth between the fifth filter cavity B7342 of the second filter branch 102 and the sixth filter cavity B5 of the second filter branch 102, The coupling bandwidth between the sixth filter cavity B6 of the second filter branch 102 and the seventh filter cavity B7 of the second filter branch 102, the coupling bandwidth between the seventh filter cavity B7 of the second filter branch 102 and the eighth filter cavity B8 of the second filter branch 102, the coupling bandwidth between the eighth filter cavity B8 of the second filter branch 102 and the ninth filter cavity B9 of the second filter branch 102, the coupling bandwidth between the ninth filter cavity B9 of the second filter branch 102 and the tenth filter cavity B10 of the second filter branch 102, the coupling bandwidth between the ninth filter cavity B9 of the second filter branch 102 and the eleventh filter cavity B11 of the second filter branch 102, the coupling bandwidth between the tenth filter cavity B10 of the second filter branch 102 and the eleventh filter cavity B11 of the second filter branch 102, and the second coupling bandwidth between the eleventh filter cavity B11 and the first port of the second filter branch 102 are respectively in the following ranges:

142Mhz-162Mhz、385Mhz-432Mhz、180Mhz-205Mhz、75Mhz-88Mhz、76Mhz-89Mhz、68Mhz-80Mhz、-52Mhz--45Mhz、61Mhz-72Mhz、75Mhz-88Mhz、76Mhz-89Mhz、79Mhz-92Mhz、49Mhz-59Mhz、-99Mhz--87Mhz、82Mhz-96Mhz、142Mhz-163Mhz。

therefore, the bandwidth of the second filtering branch 102 can be made to be within 2512-2678MHz, and the design requirement is met.

The embodiment at least has the following beneficial effects: the first filtering branch 101 and the second filtering branch 102 are arranged in sequence along the second direction d2, so that the first filtering branch 101 and the second filtering branch 102 are arranged closely; in addition, the filter cavities of different filter branches are closely arranged in blocks by dividing the second filter cavity B2-the seventh filter cavity B7 of the first filter branch 101 and the second filter cavity B2-the seventh filter cavity B7 of the second filter branch 102 into three columns arranged along the second direction d 2; the gaps between the filter cavities are further reduced by the adjacent arrangement; therefore, the arrangement between the filtering branches and the filtering cavities can be tight through the arrangement of the filtering branches and the filtering cavities, so that the cavity arrangement of the filter 10 is compact, and the size of the filter 10 can be reduced. On the other hand, the first filtering branch 101 and the second filtering branch 102 both form a cross-coupling zero point, and zero point suppression can be realized through the cross-coupling zero point, so even if the two filtering branches are closely arranged, zero point suppression can be realized through the cross-coupling zero point, and further, the isolation between different filtering branches is improved.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a second embodiment of the filter 10 provided in the present application.

As shown in fig. 4, on the basis of the first embodiment, the filter 10 of the present embodiment further includes: the second filtering branch circuit 102 and the third filtering branch circuit 103 are sequentially and adjacently arranged along the second direction d2 and are composed of eleven filtering cavities which are sequentially coupled, and eleven filtering cavities of the third filtering branch circuit 103 form three third cross-coupling zero points; the fourth filtering branch 104, the third filtering branch 103 and the fourth filtering branch 104 are sequentially and adjacently arranged along the second direction d2, and are formed by sequentially coupling eleven filtering cavities, and the eleven filtering cavities of the fourth filtering branch 104 form three fourth cross-coupling zeros.

Among them, it is worth mentioning: and the resonant frequencies of the first through eleventh filter cavities C1 through C11 of the third filter branch 103 are equal to the resonant frequencies of the first through eleventh filter cavities a1 through a11 of the first filter branch 101, respectively. And the coupling bandwidth between the cavities of the third filtering branch 103 is respectively equal to the coupling bandwidth between the cavities of the first filtering branch 101, for example, the coupling bandwidth between the fourth filtering cavity C4 and the sixth filtering cavity C6 of the third filtering branch 103 is equal to the coupling bandwidth between the fourth filtering cavity a4 and the sixth filtering cavity a6 of the first filtering branch 101, and so on.

And the resonant frequencies of the first through eleventh filter cavities D1 through D11 of the fourth filter branch 104 are equal to the resonant frequencies of the first through eleventh filter cavities B1 through B11 of the second filter branch 102, respectively. And the coupling bandwidth between the cavities of the fourth filtering branch 104 is respectively equal to the coupling bandwidth between the cavities of the second filtering branch 102.

Therefore, details about the resonant frequency and the coupling bandwidth of the third filtering branch 103 and the fourth filtering branch 104 are not repeated.

The eleven filter cavities of the third filter branch 103 are specifically the first filter cavity C1 through the eleventh filter cavity C11 of the third filter branch 103.

Preferably, in this embodiment, the sizes of the first filter cavity C1 to the seventh filter cavity C7 of the third filter branch 103 are all equal, and the sizes of the eighth filter cavity C8 to the eleventh filter cavity C11 of the third filter branch 103 are all equal.

As shown in fig. 4, the arrangement structure of the second filter cavity C2 through the eleventh filter cavity C11 of the third filter branch 103 is the same as the arrangement structure of the second filter cavity C2 through the eleventh filter cavity C11 of the first filter branch 101; the second filter cavity C2 of the third filter branch 103 is disposed close to the bisector of the housing 210 in the second direction d2 with respect to the first filter cavity C1 of the third filter branch 103, and the second filter cavity C2 of the second filter branch 102 and the second filter cavity C2 of the third filter branch 103 are disposed adjacent to each other in sequence along the second direction.

Furthermore, the first filter cavity C1 of the third filter branch 103 is arranged distant to the second filter branch 102 in the second direction d2 with respect to the second filter cavity C2 of the third filter branch 103, and an included angle formed by a connecting line between the center of the first filtering cavity C1 and the center of the second filtering cavity C2 of the third filtering branch 103 and a connecting line between the center of the second filtering cavity C2 and the center of the third filtering cavity C3 of the third filtering branch 103 is more than 145 ° and less than 180 °, the eighth filtering cavity C8 of the third filtering branch 103 is arranged close to the second filtering branch 102 in the second direction d2 relative to the seventh filtering cavity C7 of the third filtering branch 103, an included angle formed by a connecting line between the center of the seventh filtering cavity C7 and the center of the eighth filtering cavity C8 of the third filtering branch 103 and a connecting line between the center of the fifth filtering cavity C5 and the center of the seventh filtering cavity C7 of the third filtering branch 103 is more than 145 degrees and less than 180 degrees; and the first filter cavity C1 and the second filter cavity C2 of the third filter branch 103 are arranged at intervals, and the interval distance between the first filter cavity C1 and the second filter cavity C2 of the third filter branch 103 is equal to the interval distance between the first filter cavity B1 and the second filter cavity B2 of the second filter branch 102.

The third filtering branch 103 and the second filtering branch 102 are arranged adjacently, and the arrangement structure of the second filtering cavity C2 to the eleventh filtering cavity C11 of the third filtering branch 103 is the same as the arrangement structure of the second filtering cavity a2 to the eleventh filtering cavity a11 of the first filtering branch 101, so that the integrated manufacturing is facilitated, and the manufacturing procedures are reduced. Moreover, as can be seen from the arrangement structure, the filter cavities of the third filter branch 103 are roughly divided into three rows regularly arranged along the second direction d2, and a part of the filter cavities of the third filter branch 103 and a part of the filter cavities of the second filter branch 102 are located in the same row, so that the filter cavities of the third filter branch 103 and the second filter branch 102 are arranged in a block, the gap between the filter cavities can be reduced, the structure of the filter 10 is more compact, and the size of the filter 10 is further reduced. In addition, the adjacent arrangement of the filter cavities can further reduce the gap between the filter cavities, thereby further reducing the volume of the filter 10.

Specifically, the fourth filter cavity C4 and the sixth filter cavity C6 of the third filter branch 103 are cross-coupled capacitively, and the sixth filter cavity C6 and the eighth filter cavity C8 of the third filter branch 103 and the ninth filter cavity C9 and the eleventh filter cavity C11 of the third filter branch 103 are cross-coupled inductively to form three third cross-coupling zeros.

The cross-coupling manner of the third filtering branch 103 is the same as the cross-coupling manner of the first filtering branch 101. The cross coupling mode is the same, including the sequence of the cavities between the cross couplings is the same, and the zero points formed by the cross couplings are the same, as the inductive cross coupling zero points or the capacitive cross coupling zero points. For example, a capacitive cross-coupling zero is formed between the fourth filter cavity a4 and the sixth filter cavity a6 of the first filter branch 101, and since the first filter branch 101 and the third filter branch 103 are cross-coupled in the same manner, a capacitive cross-coupling zero is formed between the fourth filter cavity C4 and the sixth filter cavity C6 of the third filter branch 103, and so on.

Therefore, for a detailed description of the cross coupling, reference may be made to the description of the cross coupling of the first filtering branch 101, and details are not described herein again.

The eleven filter cavities of the fourth filter branch 104 are specifically the first filter cavity D1 through the eleventh filter cavity D11 of the fourth filter branch 104.

Preferably, in the present embodiment, the sizes of the first filter cavity D1 through the seventh filter cavity D7 of the third filter branch 104 are all equal, and the sizes of the eighth filter cavity D8 through the eleventh filter cavity D11 of the third filter branch 104 are all equal.

In particular, the second filter cavity D2 of the fourth filter branch 104 is located away from the bisector of the housing 210 in the second direction D2 with respect to the first filter cavity D1 of the fourth filter branch 104; the third filter cavity D3 and the fifth filter cavity D5 of the fourth filter branch 104 are in a row and are sequentially arranged along the first direction D1; the second filtering cavity D2, the fourth filtering cavity D4, the sixth filtering cavity D6, the seventh filtering cavity D7 and the eighth filtering cavity D8 of the fourth filtering branch 104 are in a row and are sequentially arranged along the first direction D1; the arrangement of the eighth filter chamber D8 through the eleventh filter chamber D11 of the fourth filter branch 104 is the same as the arrangement of the eighth filter chamber C8 through the eleventh filter chamber C11 of the third filter branch 103; the first filter cavity D1 and the second filter cavity D2 of the fourth filter branch 104 are disposed at an interval, the third filter cavity D3 of the fourth filter branch 104 intersects with the second filter cavity D2 of the fourth filter branch 104 and the second filter cavity D2 of the third filter branch 103 respectively, and the intersection degree of the intersection is equal, the fourth filter cavity D4 of the fourth filter branch 104 is disposed adjacent to the second filter cavity D2 and the sixth filter cavity D6 of the fourth filter branch 104, the fifth filter cavity D5 of the fourth filter branch 104 is disposed adjacent to the fourth filter cavity D4 and the sixth filter cavity D6 of the fourth filter branch 104, the fifth filter cavity D5 of the fourth filter branch 104 is disposed adjacent to the third filter cavity D3 and the fourth filter cavity D4 of the third filter branch 103, the seventh filter cavity D3934 and the sixth filter cavity D6 of the fourth filter branch 104, and the seventh filter cavity D3638 of the fourth filter branch 104 is disposed adjacent to the fourth filter cavity D3934 and the sixth filter cavity D6 of the fourth filter branch 103, The eighth filtering cavities D8 are disposed at intervals, the eighth filtering cavities D8 of the third filtering branch 103 and the eighth filtering cavities D8 of the fourth filtering branch 104 are sequentially disposed at intervals along the second direction D2, the ninth filtering cavity D9 of the fourth filtering branch 104 and the eighth filtering cavity D8 of the fourth filtering branch 104 are disposed adjacently, the ninth filtering cavity C9 of the third filtering branch 103 and the ninth filtering cavity D9 of the fourth filtering branch 104 are sequentially disposed at intervals along the second direction D2, and the tenth filtering cavity D10 of the fourth filtering branch 104 is respectively disposed adjacently to the ninth filtering cavity D9 and the eleventh filtering cavity D11 of the fourth filtering branch 104.

Further, the first filter cavity D1 of the fourth filter branch 104 is disposed close to the third filter branch 103 in the second direction D2 with respect to the second filter cavity D2 of the fourth filter branch 104, and an included angle formed by a connecting line between the center of the first filter cavity D1 and the center of the second filter cavity D2 of the fourth filter branch 104 and a connecting line between the center of the second filter cavity D2 and the center of the fourth filter cavity D4 of the fourth filter branch 104 is greater than 145 ° and less than 180 °; the first filter cavity D1 of the fourth filter branch 104 and the second filter cavity D2 are arranged at intervals, and the interval distance between the first filter cavity D1 of the fourth filter branch 104 and the interval distance between the second filter cavity D2 are equal to the interval distance between the first filter cavity C1 of the third filter branch 103 and the interval distance between the second filter cavity C2, the first filter cavity C1 of the third filter branch 103 and the first filter cavity D1 of the fourth filter branch 104 are arranged at intervals along the first direction D1, and the interval distance is equal to the interval distance between the first filter cavity B1 of the second filter branch 102 and the first filter cavity C1 of the third filter branch 103 which are arranged at intervals along the first direction D1.

The fourth filtering branch 104 and the third filtering branch 103 are arranged adjacently, and the arrangement structure of the filtering cavities of part of the fourth filtering branch 104 is the same as that of the filtering cavities of part of the third filtering branch 103, so that the integrated manufacturing is facilitated, and the manufacturing procedures are reduced. Moreover, as can be seen from the arrangement structure, the filter cavities of the fourth filter branch 104 are roughly divided into three rows regularly arranged along the second direction d2, and a part of the filter cavities of the fourth filter branch 104 and a part of the filter cavities of the third filter branch 103 are located in the same row, so that the filter cavities of the fourth filter branch 104 and the third filter branch 103 are arranged in a block, the gap between the filter cavities can be reduced, the structure of the filter 10 is more compact, and the size of the filter 10 is further reduced. In addition, the adjacent arrangement of the filter cavities can further reduce the gap between the filter cavities, thereby further reducing the volume of the filter 10. Moreover, through the crossed arrangement of the filter cavities, the traditional filter 10 can be prevented from arranging a partition wall between the mutually coupled filter cavities, and a window is arranged on the partition wall, so that the filter is convenient to manufacture, saves materials, reduces the manufacturing cost, can reduce the total volume occupied by the filter cavities, and can also reduce the volume of the filter 10.

In addition, the intersection degree of the intersection arrangement of the third filtering cavity D3 of the fourth filtering branch 104 and the second filtering cavity D2 of the fourth filtering branch 104 and the second filtering cavity D2 of the third filtering branch 103 is equal, so that the filter is convenient to manufacture, reduces the working procedures, saves the cost and can improve the consistency of the filter 10.

Referring to fig. 5, a schematic diagram of the intersection of the filter cavities is shown, and the intersection is described with reference to fig. 5: as shown in fig. 3, the sizes of the cavity 1 and the cavity 2 of the filter cavity are the same, the cavity 1 and the cavity 2 are arranged in an intersecting manner, the housing of the cavity 1 and the housing of the cavity 2 intersect to form intersection points a and B, and line segments formed by the intersection points a and B are called intersection lines. In the present application, the length of the intersection line is used to indicate the degree of intersection, i.e. if the length of the intersection line formed between two pairs of cavities is equal, the degree of intersection between the two pairs of cavities is equal.

Specifically, the fourth filter cavity D4 and the sixth filter cavity D6 of the fourth filter branch 104 are capacitively cross-coupled, and the second filter cavity D2 and the fourth filter cavity D4 of the fourth filter branch 104, and the ninth filter cavity D9 and the eleventh filter cavity D11 of the fourth filter branch 104 are inductively cross-coupled, respectively, to form three fourth cross-coupling zeros.

The cross-coupling manner of the fourth filtering branch 104 is the same as the cross-coupling manner of the second filtering branch 102, and details of the cross-coupling of the second filtering branch 102 can be seen, which is not described herein again.

The embodiment at least has the following beneficial effects: the first filtering branch 101, the second filtering branch 102, the third filtering branch 103 and the fourth filtering branch 104 are arranged in sequence along the second direction d2, so that the first filtering branch 101, the second filtering branch 102, the third filtering branch 103 and the fourth filtering branch 104 are arranged closely; in addition, the filter cavities of different filter branches are tightly arranged in blocks; the gaps between the filter cavities are further reduced by the adjacent arrangement; therefore, the arrangement between the filtering branches and the filtering cavities can be tight through the arrangement of the filtering branches and the filtering cavities, so that the cavity arrangement of the filter 10 is compact, and the size of the filter 10 can be reduced. On the other hand, the first filtering branch 101, the second filtering branch 102, the third filtering branch 103 and the fourth filtering branch 104 are all formed with cross-coupling zeros, and zero suppression can be achieved through the cross-coupling zeros, so that even if the four filtering branches are closely arranged, zero suppression can be achieved through the cross-coupling zeros, and isolation between different filtering branches is further improved.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a filter 10 according to a third embodiment of the present application.

As shown in fig. 6, in addition to the second embodiment, the filter 10 of the present embodiment further includes:

the fifth filtering branch 105, the fourth filtering branch 104 and the fifth filtering branch 105 are sequentially and adjacently arranged along the second direction d2, and are composed of eleven sequentially coupled filtering cavities, and the eleven filtering cavities of the fifth filtering branch 105 form three fifth cross-coupling zeros; the sixth filtering branch 106, the fifth filtering branch 105 and the sixth filtering branch 106 are sequentially and adjacently arranged along the second direction d2, and are formed by sequentially coupling eleven filtering cavities, and the eleven filtering cavities of the sixth filtering branch 106 form three sixth cross-coupling zeros; the seventh filtering branch 107, the sixth filtering branch 106 and the seventh filtering branch 107 are sequentially and adjacently arranged along the second direction d2, and are composed of eleven sequentially coupled filtering cavities, and the eleven filtering cavities of the seventh filtering branch 107 form three seventh cross-coupling zeros; the eighth filtering branch 108, the seventh filtering branch 107 and the eighth filtering branch 108 are sequentially and adjacently arranged along the second direction d2, and are formed by sequentially coupling eleven filtering cavities, and the eleven filtering cavities of the eighth filtering branch 108 form three eighth cross-coupling zeros;

the fifth, sixth, seventh, and eighth filtering branches are sequentially arranged along the second direction d2, so that the gaps between the filtering branches can be reduced, the structure of the filter 10 is more compact, and the size of the filter 10 is further reduced.

Preferably, in this embodiment, the sizes of the first filter cavity to the seventh filter cavity of the fifth, sixth, seventh, and eighth filter branch are all equal, and the sizes of the eighth filter cavity to the eleventh filter cavity of the fifth, sixth, seventh, and eighth filter branch are all equal.

Among them, it is worth mentioning: and the resonant frequencies of the first through eleventh filter cavities E1 through E11 of the fifth filter branch 105 are equal to the resonant frequencies of the first through eleventh filter cavities B1 through B11 of the second filter branch 102, respectively. And the coupling bandwidth between the cavities of the fifth filtering branch 105 is respectively equal to the coupling bandwidth between the cavities of the second filtering branch 102, for example, the coupling bandwidth between the fourth filtering cavity E4 and the sixth filtering cavity E6 of the fifth filtering branch 105 is equal to the coupling bandwidth between the fourth filtering cavity B4 and the sixth filtering cavity B6 of the second filtering branch 102, and so on.

And the resonant frequencies of the first through eleventh filter cavities F1 through F11 of the sixth filter branch 106 are equal to the resonant frequencies of the first through eleventh filter cavities a1 through a11 of the first filter branch 101, respectively. And the coupling bandwidth between the cavities of the sixth filtering branch 106 is respectively equal to the coupling bandwidth between the cavities of the first filtering branch 101.

And the resonant frequencies of the first through eleventh filter cavities G1 through G11 of the seventh filter branch 107 are equal to the resonant frequencies of the first through eleventh filter cavities B1 through B11, respectively, of the second filter branch 102. And the coupling bandwidth between the cavities of the seventh filtering branch 107 is respectively equal to the coupling bandwidth between the cavities of the second filtering branch 102.

And the resonant frequencies of the first through eleventh filter cavities H1 through H11 of the eighth filter branch 108 are equal to the resonant frequencies of the first through eleventh filter cavities a1 through a11 of the first filter branch 101, respectively. And the coupling bandwidth between the cavities of the eighth filtering branch 108 is respectively equal to the coupling bandwidth between the cavities of the first filtering branch 101.

Therefore, details about the resonant frequency and the coupling bandwidth of the fifth filtering branch 105, the sixth filtering branch 106, the seventh filtering branch 107 and the eighth filtering branch 108 are not repeated.

The eleven filter cavities of the fifth filter branch 105 are specifically the first filter cavity E1 through the eleventh filter cavity E11 of the fifth filter branch 105.

The first to seventh filter cavities E7 of the fifth filter branch 105 and the first to seventh filter cavities of the fourth filter branch 104 are symmetrically arranged, and the second filter cavity D2 of the fourth filter branch 104 and the second filter cavity E2 of the fifth filter branch 105 are sequentially and adjacently arranged along the second direction D2; the ninth filtering cavity E9 through the eleventh filtering cavity E11 of the fifth filtering branch 105 and the ninth filtering cavity D9 through the eleventh filtering cavity D11 of the fourth filtering branch 104 are symmetrically arranged, and the ninth filtering cavity D9 of the fourth filtering branch 104 and the ninth filtering cavity E9 of the fifth filtering branch 105 are sequentially arranged at intervals along the second direction D2; the eighth filter cavity E8 of the fifth filter branch 105 is arranged away from the bisector of the housing 210 in the second direction d2 with respect to the seventh filter cavity E7 of the fifth filter branch 105, the ninth filter cavity E9 of the fifth filter branch 105 is arranged away from the bisector of the housing 210 in the second direction d2 with respect to the eighth filter cavity E8 of the fifth filter branch 105, and the seventh filter cavity E7 to the ninth filter cavity E9 of the fifth filter branch 105 are arranged in a triangle; the eighth filtering cavity E8 of the fifth filtering branch 105 is respectively disposed at an interval with the seventh filtering cavity E7 and the ninth filtering cavity E9 of the fifth filtering branch 105, and the eighth filtering cavity D8 of the fourth filtering branch 104 and the eighth filtering cavity E8 of the fifth filtering branch 105 are sequentially disposed adjacently along the second direction D2.

Furthermore, the first filter cavity E1 of the fifth filter branch 105 is arranged distant to the fourth filter branch 104 in the second direction d2 with respect to the second filter cavity E2 of the fifth filter branch 105, and the connecting line between the center of the first filter cavity E1 and the center of the second filter cavity E2 of the fifth filter branch 105 and the connecting line between the center of the second filter cavity E2 and the center of the fourth filter cavity E4 of the fifth filter branch 105 form an included angle larger than 150 ° and smaller than 180 °, the eighth filter cavity E8 of the fifth filter branch 105 is disposed far away from the fourth filter branch 104 in the second direction d2 relative to the seventh filter cavity E7 of the fifth filter branch 105, an included angle formed by a connecting line between the center of the seventh filter cavity E7 and the center of the eighth filter cavity E8 of the fifth filter branch 105 and a connecting line between the center of the sixth filter cavity E6 and the center of the seventh filter cavity E7 of the fifth filter branch 105 is more than 145 degrees and less than 180 degrees; the first filter cavity E1 and the second filter cavity E2 of the fifth filter branch 105 are spaced apart from each other, and the spacing distance between the first filter cavity E1 and the second filter cavity E2 of the fifth filter branch 105 is equal to the spacing distance between the first filter cavity D1 and the second filter cavity D2 of the fourth filter branch 104, and the first filter cavity E1 of the fourth filter branch 104 and the first filter cavity E1 of the fifth filter branch 105 are spaced apart from each other along the first direction D1, and the spacing distance is equal to the spacing distance between the first filter cavity C1 of the third filter branch 103 and the first filter cavity D1 of the fourth filter branch 104 along the first direction D1.

Through the adjacent setting between the filtering branch road, adjacent setting between the filtering chamber and the adjacent blocking setting of the filtering chamber between the different filtering branch roads can make the structure of the filter 10 more compact, and then reduce the volume of the filter 10. A more detailed description of the beneficial effects of the arrangement of the fourth filtering branch 104 can be found, and therefore, the description thereof is omitted here.

The fourth filter cavity E4 and the sixth filter cavity E6 of the fifth filter branch 105 are capacitively cross-coupled, respectively, and the second filter cavity E2 and the fourth filter cavity E4 of the fifth filter branch 105, and the ninth filter cavity E9 and the eleventh filter cavity E11 of the fifth filter branch 105 are inductively cross-coupled, respectively, to form three fifth cross-coupling zeros.

The cross-coupling manner of the fifth filtering branch 105 is the same as the cross-coupling manner of the second filtering branch 102, so the detailed description of the cross-coupling of the fifth filtering branch 105 can be seen in the detailed description of the cross-coupling of the second filtering branch 102.

The eleven filter cavities of the sixth filter branch 106 are specifically the first filter cavity F1 through the eleventh filter cavity F11 of the sixth filter branch 106.

In particular, the second filter cavity F2 of the sixth filter branch 106 is arranged away from the mid-line of the housing 210 in the second direction d2 with respect to the first filter cavity F1 of the sixth filter branch 106; the fifth filter cavity F5 and the seventh filter cavity F7 of the sixth filter branch 106 are in a row and are sequentially arranged along the first direction d 1; the second filter cavity F2, the third filter cavity F3, the fourth filter cavity F4 and the sixth filter cavity F6 of the sixth filter branch 106 are in a row and are sequentially arranged along the first direction d 1; the ninth filtering cavity F9, the tenth filtering cavity F10 and the eleventh filtering cavity F11 of the sixth filtering branch 106 are in a row and are sequentially arranged along the first direction d 1; the eighth filter chamber F8 of the sixth filter branch 106 is arranged at a distance from the center dividing line of the housing 210 in the second direction d2 with respect to the seventh filter chamber F7 of the sixth filter branch 106, and the ninth filter chamber F9 of the sixth filter branch 106 is arranged at a distance from the center dividing line of the housing 210 in the second direction d2 with respect to the eighth filter chamber F8 of the sixth filter branch 106; the third filter cavity F3 of the sixth filter branch 106 is respectively disposed adjacent to the second filter cavity F2 and the fourth filter cavity F4 of the sixth filter branch 106, the fifth filter cavity F5 of the sixth filter branch 106 is respectively disposed adjacent to the fourth filter cavity F4, the sixth filter cavity F6 and the seventh filter cavity F7 of the sixth filter branch 106, the fifth filter cavity F5 of the sixth filter branch 106 is respectively disposed adjacent to the sixth filter cavity E6 and the seventh filter cavity E7 of the fifth filter branch 105, the eighth filter cavity F8 of the sixth filter branch 106 is disposed at an interval to the seventh filter cavity F59648 of the sixth filter branch 106, the eighth filter cavity F8 of the sixth filter branch 106 is disposed adjacent to the ninth filter cavity F9 of the sixth filter branch 106, and the eighth filter cavity E2 of the fifth filter branch 105 and the eighth filter cavity E8 of the sixth filter branch 106 are disposed at an interval to the ninth filter cavity F8 of the sixth filter branch 106, and the ninth filter cavity F8 of the sixth filter branch 106 are disposed along the interval to the ninth filter cavity F8 of the ninth filter cavity F638, and the ninth filtering cavity E9 of the fifth filtering branch 105 and the ninth filtering cavity F9 of the sixth filtering branch 106 are sequentially arranged at intervals along the first direction d1, and the tenth filtering cavity F10 of the sixth filtering branch 106 is respectively arranged adjacent to the ninth filtering cavity F9 and the eleventh filtering cavity F11 of the sixth filtering branch 106.

Furthermore, the first filter cavity F1 of the sixth filter branch 106 is arranged adjacent to the fifth filter branch 105 in the second direction d2 with respect to the second filter cavity F2 of the sixth filter branch 106, and the angle formed by the connecting line between the center of the first filter cavity F1 and the center of the second filter cavity F2 of the sixth filter branch 106 and the connecting line between the center of the second filter cavity F2 and the center of the third filter cavity F3 of the sixth filter branch 106 is greater than 145 ° and less than 180 °, the eighth filter cavity F8 of the sixth filter branch 106 is disposed away from the fifth filter branch 105 in the second direction d2 with respect to the seventh filter cavity F7 of the sixth filter branch 106, an included angle formed by a connecting line between the center of the seventh filter cavity F7 and the center of the eighth filter cavity F8 of the sixth filter branch 106 and a connecting line between the center of the fifth filter cavity F5 and the center of the seventh filter cavity F7 of the sixth filter branch 106 is more than 145 degrees and less than 180 degrees;

the first filter cavity F1 and the second filter cavity F2 of the sixth filter branch 106 are spaced apart from each other, and the spacing distance between the first filter cavity F1 and the second filter cavity F2 of the sixth filter branch 106 is equal to the spacing distance between the first filter cavity E1 and the second filter cavity E2 of the fifth filter branch 105, and the first filter cavity E1 of the fifth filter branch 105 and the first filter cavity F1 of the sixth filter branch 106 are spaced apart from each other along the first direction D1, and the spacing distance is equal to the spacing distance between the first filter cavity D1 of the fourth filter branch 104 and the first filter cavity E1 of the fifth filter branch 105 along the first direction D1. Wherein, by having equal spacing distances, the integrated manufacturing is facilitated, the manufacturing process is reduced, and the consistency of the filter 10 is improved.

For more specific advantages of the arrangement of the filter cavities of the sixth filter branch 106, details of the arrangement of the fourth filter branch 104 can be found, and are not described herein again.

Capacitive cross coupling is performed between the fourth filter cavity F4 and the sixth filter cavity F6 of the sixth filter branch 106, inductive cross coupling is performed between the sixth filter cavity F6 and the eighth filter cavity F8 of the sixth filter branch 106, and between the ninth filter cavity F9 and the eleventh filter cavity F11 of the sixth filter branch 106, so as to form three sixth cross coupling zeros.

The cross-coupling manner of the sixth filtering branch 106 is the same as that of the first filtering branch 101, and is not described herein again.

The eleven filter cavities of the seventh filter branch 107 are specifically the first filter cavity G1 through the eleventh filter cavity G11 of the seventh filter branch 107.

Specifically, the arrangement of the first filter chamber G1 to the seventh filter chamber G7 of the seventh filter branch 107 is the same as the arrangement of the first filter chamber E1 to the seventh filter chamber E7 of the fifth filter branch 105; the eighth filter chamber G8 of the seventh filter branch 107 is arranged at a distance from the center dividing line of the housing 210 in the second direction d2 with respect to the seventh filter chamber G7 of the seventh filter branch 107, and the ninth filter chamber G9 of the seventh filter branch 107 is arranged at a distance from the center dividing line of the housing 210 in the second direction d2 with respect to the eighth filter chamber G8 of the seventh filter branch 107; the ninth filtering cavity G9, the tenth filtering cavity G10 and the eleventh filtering cavity G11 of the seventh filtering branch 107 are in a row and are sequentially arranged along the first direction d 1; the second filtering cavity G2 of the sixth filtering branch 106 and the second filtering cavity G2 of the seventh filtering branch 107 are sequentially and adjacently disposed along the first direction d1, the seventh filtering cavity G7 of the seventh filtering branch 107 and the eighth filtering cavity G8 of the seventh filtering branch 107 are disposed at an interval, the eighth filtering cavity G8 of the seventh filtering branch 107 and the ninth filtering cavity G9 of the seventh filtering branch 107 are disposed at an interval, the ninth filtering cavity F9 of the sixth filtering branch 106 and the ninth filtering cavity G9 of the seventh filtering branch 107 are sequentially disposed at an interval along the first direction d1, and the tenth filtering cavity G10 of the seventh filtering branch 107 is disposed adjacent to the ninth filtering cavity G9 and the eleventh filtering cavity G11 of the seventh filtering branch 107, respectively.

Further, the first filter cavity G1 of the seventh filter branch 107 is arranged distant to the sixth filter branch 106 in the second direction d2 with respect to the second filter cavity G2 of the seventh filter branch 107, and an included angle formed by a connecting line between the center of the first filtering cavity G1 and the center of the second filtering cavity G2 of the seventh filtering branch 107 and a connecting line between the center of the second filtering cavity G2 and the center of the fourth filtering cavity G4 of the seventh filtering branch 107 is greater than 150 ° and less than 180 °, the eighth filtering cavity G8 of the seventh filtering branch 107 is disposed far away from the sixth filtering branch 106 in the second direction d2 relative to the seventh filtering cavity G7 of the seventh filtering branch 107, an included angle formed by a connecting line between the center of the seventh filtering cavity G7 and the center of the eighth filtering cavity G8 of the seventh filtering branch 107 and a connecting line between the center of the sixth filtering cavity G6 and the center of the seventh filtering cavity G7 of the seventh filtering branch 107 is more than 145 degrees and less than 180 degrees;

the first filter cavity G1 and the second filter cavity G2 of the seventh filter branch 107 are spaced apart from each other, and the spacing distance between the first filter cavity G1 and the second filter cavity G2 of the seventh filter branch 107 is equal to the spacing distance between the first filter cavity F1 and the second filter cavity F2 of the sixth filter branch 106, and the first filter cavity F1 of the sixth filter branch 106 and the first filter cavity G1 of the seventh filter branch 107 are spaced apart from each other along the first direction d1, and the spacing distance is equal to the spacing distance between the first filter cavity E1 of the fifth filter branch 105 and the first filter cavity F1 of the sixth filter branch 106 along the first direction d 1.

The beneficial effect of the filter cavity arrangement of the seventh filtering branch 107 can be seen in the filter cavity arrangement effect of the second filtering branch 102, and is not described herein again.

The fourth filtering cavity G4 and the sixth filtering cavity G6 of the seventh filtering branch 107 are capacitively cross-coupled, and the second filtering cavity G2 and the fourth filtering cavity G4 of the seventh filtering branch 107, and the ninth filtering cavity G9 and the eleventh filtering cavity G11 of the seventh filtering branch 107 are inductively cross-coupled, respectively, to form three seventh cross-coupling zeros.

The cross-coupling manner of the seventh filtering branch 107 is the same as that of the second filtering branch 102, and is not described herein again.

The eleven filter cavities of the eighth filter branch 108 are specifically the first filter cavity H1 through the eleventh filter cavity H11 of the eighth filter branch 108.

Specifically, the arrangement structures of the first filtering cavity H1 to the eleventh filtering cavity H11 of the eighth filtering branch 108 are the same as the arrangement structures of the first filtering cavity F1 to the eleventh filtering cavity F11 of the sixth filtering branch 106, and the second filtering cavity H2 and the third filtering cavity H3 of the eighth filtering branch 108 are respectively arranged adjacent to the third filtering cavity G3 of the seventh filtering branch 107;

further, the first filter cavity H1 and the second filter cavity H2 of the eighth filter branch 108 are spaced apart, and the spacing distance between the first filter cavity H1 and the second filter cavity H2 of the eighth filter branch 108 is equal to the spacing distance between the first filter cavity G1 and the second filter cavity G2 of the seventh filter branch 107, and the first filter cavity G1 of the seventh filter branch 107 and the first filter cavity H1 of the eighth filter branch 108 are spaced apart along the first direction d1, and the spacing distance is equal to the spacing distance between the first filter cavity F1 of the sixth filter branch 106 and the first filter cavity G1 of the seventh filter branch 107 along the first direction d 1.

The arrangement of the first filter cavity H1 to the eleventh filter cavity H11 of the eighth filter branch 108 is the same as the arrangement of the first filter cavity F1 to the eleventh filter cavity F11 of the sixth filter branch 106, which facilitates the integrated manufacturing, reduces the manufacturing process, and improves the uniformity of the filter 10.

The fourth filter cavity H4 and the sixth filter cavity H6 of the eighth filter branch 108 are capacitively cross-coupled, and the sixth filter cavity H6 and the eighth filter cavity H8 of the eighth filter branch 108, and the ninth filter cavity H9 and the eleventh filter cavity H11 of the eighth filter branch 108 are inductively cross-coupled, respectively, to form three eighth cross-coupling zeros.

The cross-coupling manner of the eighth filtering branch 108 is the same as that of the first filtering branch 101, and is not described herein again.

The embodiment at least has the following beneficial effects: the first to eighth filtering branches 108 are closely arranged by arranging the first to eighth filtering branches 108 in sequence along the second direction d 2; in addition, the filter cavities of different filter branches are tightly arranged in blocks; the gaps between the filter cavities are further reduced by the adjacent arrangement; therefore, the arrangement between the filtering branches and the filtering cavities can be tight through the arrangement of the filtering branches and the filtering cavities, so that the cavity arrangement of the filter 10 is compact, and the size of the filter 10 can be reduced. On the other hand, the first to eighth filtering branches 108 are all formed with cross-coupling zeros, and zero suppression can be achieved through the cross-coupling zeros, so that even though the eight filtering branches are closely arranged, zero suppression can be achieved through the cross-coupling zeros, and isolation between different filtering branches is further improved.

Please refer to fig. 7, which is a diagram illustrating simulation results of the filter 10 provided in the present application.

Corresponding to the first resonance frequency and the first coupling bandwidth of the above-mentioned embodiment, the bandwidths of the first to eighth filtering branches 108 of the filter 10 provided by the present application can be located (see the frequency band 110) within 3396-3603 MHz.

Wherein, the first to eighth filtering branches 108 of the filter 10 suppress more than or equal to 90dB at the bandwidth of 9KHz-2700MHz, suppress more than 80dB at the bandwidth of 2700MHz-3000MHz, suppress more than 70dB at the bandwidth of 3000MHz-3200MHz, suppress more than 57dB at the bandwidth of 3200MHz-3300MHz, suppress more than 40dB at the bandwidth of 3300MHz-3260MHz, suppress more than 35dB at the bandwidth of 3360MHz-3380MHz, suppress more than 20dB at the bandwidth of 3380MHz-3390MHz, suppress more than 20dB at the bandwidth of 3610MHz-3620MHz, suppress more than 20dB at the bandwidth of 3620MHz-3640MHz, suppress more than 35dB at the bandwidth of 3640MHz-3700MHz, suppress more than 40dB at the bandwidth of 3640MHz-3700MHz, suppress more than 49dB at the bandwidth of 0MHz-4000MHz, The suppression is more than 55dB in the bandwidth of 4000MHz-5000MHz and more than 60dB in the bandwidth of 5000MHz-5850 MHz.

Please refer to fig. 8, which is a diagram illustrating simulation results of the filter 10 provided in the present application.

Corresponding to the second resonance frequency and the second coupling bandwidth of the above-mentioned embodiment, the bandwidths of the first to eighth filtering branches 108 of the filter 10 provided by the present application can be located (see the frequency band 120) within 2513-2678 MHz.

The first to eighth filtering branches 108 of the filter 10 suppress the signal by 80dB or more when the bandwidth is 0.9MHz-2025MHz, suppress by 70dB or more when the bandwidth is 2025MHz-2400MHz, suppress by 63dB or more when the bandwidth is 2400MHz-2450MHz, suppress by 60dB or more when the bandwidth is 2450MHz-2455MHz, suppress by 50dB when the bandwidth is 2455MHz-2500MHz, suppress by 50dB when the bandwidth is 2700MHz-2735MHz, suppress by 75dB or more when the bandwidth is 2735MHz-2900MHz, suppress by 50dB when the bandwidth is 2900MHz-3200MHz, suppress by 76dB when the bandwidth is 3200MHz-5000MHz, suppress by 60dB when the bandwidth is 5000MHz-5850 MHz.

The present application further provides a communication device, as shown in fig. 9, fig. 9 is a schematic diagram of an embodiment of the communication device of the present application.

As shown in fig. 9, the communication device 30 of this embodiment includes an antenna 32 and a Radio frequency unit 31, where the antenna 32 is connected to the Radio frequency unit 31, and the Radio frequency unit may be an rru (remote Radio unit). The rf unit 31 includes the filter 10 disclosed in the above embodiments, and is used for filtering the rf signal.

In other embodiments, the rf unit 31 may be integrated with the Antenna 32 to form an active Antenna unit (aau).

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims

1. A filter, characterized in that the filter comprises:

a housing having a first direction and a second direction perpendicular to the first direction;

the first filtering branch is arranged on the shell and consists of eleven filtering cavities which are sequentially coupled, and the eleven filtering cavities of the first filtering branch form three first cross-coupling zero points;

the first filtering branch and the second filtering branch are sequentially and adjacently arranged along the second direction and are formed by eleven filtering cavities which are sequentially coupled, and eleven filtering cavities of the second filtering branch form three second cross coupling zero points;

and the second filtering cavities to the seventh filtering cavities of the first filtering branch circuit and the second filtering cavities to the seventh filtering cavities of the second filtering branch circuit are divided into three rows arranged along the second direction.

2. The filter of claim 1,

the second filter cavity of the first filter branch is arranged close to the middle dividing line of the shell in the second direction relative to the first filter cavity of the first filter branch;

the second filtering cavity, the third filtering cavity, the fourth filtering cavity and the sixth filtering cavity of the first filtering branch are in a row and are sequentially arranged along the first direction;

the fifth filtering cavities and the seventh filtering cavities of the first filtering branch are in a row and are sequentially arranged along the first direction;

the ninth filtering cavity, the tenth filtering cavity and the eleventh filtering cavity of the first filtering branch are in a row and are sequentially arranged along the first direction;

the eighth filtering cavity of the first filtering branch is far away from the median line of the shell in the second direction relative to the seventh filtering cavity of the first filtering branch, and the sixth filtering cavity to the eighth filtering cavity of the first filtering branch are arranged in a triangular shape;

the ninth filtering cavity of the first filtering branch is arranged close to the middle branching line of the shell in the second direction relative to the eighth filtering cavity of the first filtering branch, and the seventh filtering cavity to the ninth filtering cavity of the first filtering branch are arranged in a triangular shape;

the first filter cavity and the second filter cavity of the first filter branch are arranged at intervals, the third filter cavity of the first filter branch is respectively adjacent to the second filter cavity and the fourth filter cavity of the first filter branch, the sixth filter cavity of the first filter branch is respectively adjacent to the fourth filter cavity, the fifth filter cavity and the seventh filter cavity of the first filter branch, the eighth filter cavity of the first filter branch is respectively adjacent to the seventh filter cavity and the ninth filter cavity of the first filter branch, and the tenth filter cavity of the first filter branch is respectively adjacent to the ninth filter cavity and the eleventh filter cavity of the first filter branch;

the fourth filter cavity and the sixth filter cavity of the first filter branch are respectively in capacitive cross coupling, the sixth filter cavity and the eighth filter cavity of the first filter branch are respectively in inductive cross coupling, and the ninth filter cavity and the eleventh filter cavity of the first filter branch are respectively in inductive cross coupling, so that three first cross coupling zeros are formed.

3. The filter of claim 2,

the second filter cavity of the second filter branch circuit is far away from the middle branching line of the shell in the second direction relative to the first filter cavity of the second filter branch circuit;

the second filtering cavity, the fourth filtering cavity, the sixth filtering cavity and the seventh filtering cavity of the second filtering branch are in a row and are sequentially arranged along the first direction;

the third filtering cavities and the fifth filtering cavities of the second filtering branch are in a row and are sequentially arranged along the first direction;

the ninth filtering cavity, the tenth filtering cavity and the eleventh filtering cavity of the second filtering branch are in a row and are sequentially arranged along the first direction;

the eighth filter cavity of the second filter branch is far away from the median line of the shell in the second direction relative to the seventh filter cavity of the second filter branch, the ninth filter cavity of the second filter branch is far away from the median line of the shell in the second direction relative to the eighth filter cavity of the second filter branch, and the seventh filter cavity to the ninth filter cavity of the second filter branch are arranged in a triangular shape;

the second filter cavity of the second filter branch is arranged at an interval with the first filter cavity of the second filter branch, the third filter cavity of the second filter branch is respectively arranged adjacent to the second filter cavity, the fourth filter cavity and the fifth filter cavity of the second filter branch, the third filter cavity of the second filter branch is respectively arranged adjacent to the second filter cavity and the third filter cavity of the first filter branch, the sixth filter cavity of the second filter branch is respectively arranged adjacent to the fourth filter cavity and the seventh filter cavity of the second filter branch, the eighth filter cavity of the second filter branch is respectively arranged at an interval with the seventh filter cavity and the ninth filter cavity of the second filter branch and is arranged at an interval with the eighth filter cavity and the ninth filter cavity of the first filter branch, and the tenth filter cavity of the second branch is respectively arranged at an interval with the ninth filter cavity and the ninth filter cavity of the second filter branch, The eleventh filtering cavities are adjacently arranged;

and the fourth filter cavity and the sixth filter cavity of the second filter branch are in capacitive cross coupling, and the second filter cavity and the fourth filter cavity of the second filter branch and the ninth filter cavity and the eleventh filter cavity of the second filter branch are in inductive cross coupling respectively to form three second cross coupling zeros.

4. The filter of claim 1, further comprising:

the second filtering branch and the third filtering branch are sequentially and adjacently arranged along the second direction and are composed of eleven filtering cavities which are sequentially coupled, and the eleven filtering cavities of the third filtering branch form three third cross-coupling zero points;

the third filtering branch and the fourth filtering branch are sequentially and adjacently arranged along the second direction and are formed by eleven filtering cavities which are sequentially coupled, and eleven filtering cavities of the fourth filtering branch form three fourth cross-coupling zero points;

the arrangement structure of the second filtering cavity to the eleventh filtering cavity of the third filtering branch is the same as that of the second filtering cavity to the eleventh filtering cavity of the first filtering branch;

a second filter cavity of the third filter branch is arranged close to the middle branching line of the shell in the second direction relative to the first filter cavity of the third filter branch, and the second filter cavity of the second filter branch and the second filter cavity of the third filter branch are sequentially and adjacently arranged along the second prevention direction;

and the fourth filter cavity and the sixth filter cavity of the third filter branch are in capacitive cross coupling, and the sixth filter cavity and the eighth filter cavity of the third filter branch and the ninth filter cavity and the eleventh filter cavity of the third filter branch are in inductive cross coupling respectively to form three third cross coupling zeros.

5. The filter of claim 4,

the second filter cavity of the fourth filter branch is far away from the middle branching line of the shell in the second direction relative to the first filter cavity of the fourth filter branch;

the third filtering cavities and the fifth filtering cavities of the fourth filtering branch are in a row and are sequentially arranged along the first direction;

the second filtering cavity, the fourth filtering cavity, the sixth filtering cavity, the seventh filtering cavity and the eighth filtering cavity of the fourth filtering branch are in a row and are sequentially arranged along the first direction;

the arrangement structure of the eighth filtering cavity to the eleventh filtering cavity of the fourth filtering branch is the same as the arrangement structure of the eighth filtering cavity to the eleventh filtering cavity of the third filtering branch;

the filter is characterized in that the first filter cavity and the second filter cavity of the fourth filter branch are arranged at intervals, the third filter cavity of the fourth filter branch is respectively arranged with the second filter cavity of the fourth filter branch and the second filter cavity of the third filter branch in an intersecting way, the intersecting degrees of the intersecting arrangement are equal, the fourth filter cavity of the fourth filter branch is respectively arranged adjacent to the second filter cavity and the sixth filter cavity of the fourth filter branch, the fifth filter cavity of the fourth filter branch is respectively arranged adjacent to the fourth filter cavity and the sixth filter cavity of the fourth filter branch, the fifth filter cavity of the fourth filter branch is respectively arranged adjacent to the third filter cavity and the fourth filter cavity of the third filter branch, the seventh filter cavity and the sixth filter cavity of the fourth filter branch are arranged adjacent to each other, and the seventh filter cavity, the sixth filter cavity and the, Eighth filtering cavities are arranged at intervals, the eighth filtering cavities of the third filtering branch and the fourth filtering cavities of the fourth filtering branch are sequentially arranged at intervals along the second direction, the ninth filtering cavity of the fourth filtering branch and the eighth filtering cavity of the fourth filtering branch are arranged adjacently, the ninth filtering cavity of the third filtering branch and the ninth filtering cavity of the fourth filtering branch are sequentially arranged at intervals along the second direction, and the tenth filtering cavity of the fourth filtering branch is respectively arranged adjacently to the ninth filtering cavity and the eleventh filtering cavity of the fourth filtering branch;

and the fourth filter cavity and the sixth filter cavity of the fourth filter branch are in capacitive cross coupling, and the second filter cavity and the fourth filter cavity of the fourth filter branch, and the ninth filter cavity and the eleventh filter cavity of the fourth filter branch are in inductive cross coupling respectively to form three fourth cross coupling zeros.

6. The filter of claim 4, further comprising:

the fourth filtering branch and the fifth filtering branch are sequentially and adjacently arranged along the second direction and are composed of eleven filtering cavities which are sequentially coupled, and the eleven filtering cavities of the fifth filtering branch form three fifth cross-coupling zero points;

the fifth filtering branch and the sixth filtering branch are sequentially and adjacently arranged along the second direction and are formed by eleven sequentially-coupled filtering cavities, and eleven filtering cavities of the sixth filtering branch form three sixth cross-coupling zero points;

the sixth filtering branch and the seventh filtering branch are sequentially and adjacently arranged along the second direction and are composed of eleven filtering cavities which are sequentially coupled, and the eleven filtering cavities of the seventh filtering branch form three seventh cross-coupling zero points;

the seventh filtering branch and the eighth filtering branch are sequentially and adjacently arranged along the second direction and are formed by eleven sequentially-coupled filtering cavities, and the eleven filtering cavities of the eighth filtering branch form three eighth cross-coupling zero points;

the first to seventh filter cavities of the fifth filter branch and the first to seventh filter cavities of the fourth filter branch are symmetrically arranged, and the second filter cavity of the fourth filter branch and the second filter cavity of the fifth filter branch are sequentially and adjacently arranged along the second direction;

the ninth filtering cavity to the eleventh filtering cavity of the fifth filtering branch and the ninth filtering cavity to the eleventh filtering cavity of the fourth filtering branch are symmetrically arranged, and the ninth filtering cavity of the fourth filtering branch and the ninth filtering cavity of the fifth filtering branch are sequentially arranged at intervals along the second direction;

the eighth filter cavity of the fifth filter branch is far away from the median line of the shell in the second direction relative to the seventh filter cavity of the fifth filter branch, the ninth filter cavity of the fifth filter branch is far away from the median line of the shell in the second direction relative to the eighth filter cavity of the fifth filter branch, and the seventh filter cavity to the ninth filter cavity of the fifth filter branch are arranged in a triangular shape;

the eighth filter cavity of the fifth filter branch is respectively arranged at intervals with the seventh filter cavity and the ninth filter cavity of the fifth filter branch, and the eighth filter cavity of the fourth filter branch and the eighth filter cavity of the fifth filter branch are sequentially and adjacently arranged along the second direction;

and a fourth filtering cavity and a sixth filtering cavity of the fifth filtering branch are respectively in capacitive cross coupling, and a second filtering cavity and a fourth filtering cavity of the fifth filtering branch and a ninth filtering cavity and an eleventh filtering cavity of the fifth filtering branch are respectively in inductive cross coupling, so as to form three fifth cross coupling zeros.

7. The filter of claim 6,

the second filter cavity of the sixth filter branch circuit is far away from the middle branching line of the shell in the second direction relative to the first filter cavity of the sixth filter branch circuit;

the fifth filtering cavities and the seventh filtering cavities of the sixth filtering branch are in a row and are sequentially arranged along the first direction;

the second filtering cavity, the third filtering cavity, the fourth filtering cavity and the sixth filtering cavity of the sixth filtering branch are in a row and are sequentially arranged along the first direction;

the ninth filtering cavity, the tenth filtering cavity and the eleventh filtering cavity of the sixth filtering branch are in a row and are sequentially arranged along the first direction;

the eight filter cavities of the sixth filter branch circuit are far away from the mid-split line of the shell in the second direction relative to the seventh filter cavity of the sixth filter branch circuit, and the nine filter cavities of the sixth filter branch circuit are far away from the mid-split line of the shell in the second direction relative to the eighth filter cavity of the sixth filter branch circuit;

the third filter cavity of the sixth filter branch is respectively arranged adjacent to the second filter cavity and the fourth filter cavity of the sixth filter branch, the fifth filter cavity of the sixth filter branch is respectively arranged adjacent to the fourth filter cavity, the sixth filter cavity and the seventh filter cavity of the sixth filter branch, the fifth filter cavity of the sixth filter branch is respectively arranged adjacent to the sixth filter cavity and the seventh filter cavity of the fifth filter branch, the eighth filter cavity of the sixth filter branch is arranged at an interval with the seventh filter cavity of the sixth filter branch, the eighth filter cavity of the sixth filter branch is arranged adjacent to the ninth filter cavity of the sixth filter branch, the eighth filter cavity of the fifth filter branch and the eighth filter cavity of the sixth filter branch are arranged at an interval along the first direction, the ninth filter cavity of the sixth filter branch is arranged adjacent to the eighth filter cavity of the sixth filter branch, the ninth filter cavity of the fifth filter branch and the ninth filter cavity of the sixth filter branch are sequentially arranged at intervals along the first direction, and the tenth filter cavity of the sixth filter branch is respectively adjacent to the ninth filter cavity and the eleventh filter cavity of the sixth filter branch;

and the fourth filter cavity and the sixth filter cavity of the sixth filter branch are in capacitive cross coupling, and the sixth filter cavity and the eighth filter cavity of the sixth filter branch and the ninth filter cavity and the eleventh filter cavity of the sixth filter branch are in inductive cross coupling respectively to form three sixth cross coupling zeros.

8. The filter of claim 7,

the arrangement structures of the first filtering cavity to the seventh filtering cavity of the seventh filtering branch are the same as the arrangement structures of the first filtering cavity to the seventh filtering cavity of the fifth filtering branch;

the eighth filter cavity of the seventh filter branch is far away from the mid-split line of the shell in the second direction relative to the seventh filter cavity of the seventh filter branch, and the ninth filter cavity of the seventh filter branch is far away from the mid-split line of the shell in the second direction relative to the eighth filter cavity of the seventh filter branch;

the ninth filtering cavity, the tenth filtering cavity and the eleventh filtering cavity of the seventh filtering branch are in a row and are sequentially arranged along the first direction;

the second filter cavity of the sixth filter branch and the second filter cavity of the seventh filter branch are sequentially and adjacently arranged along the first direction, the seventh filter cavity of the seventh filter branch and the eighth filter cavity of the seventh filter branch are arranged at intervals, the eighth filter cavity of the seventh filter branch and the ninth filter cavity of the seventh filter branch are arranged at intervals, the ninth filter cavity of the sixth filter branch and the ninth filter cavity of the seventh filter branch are sequentially arranged at intervals along the first direction, and the tenth filter cavity of the seventh filter branch is respectively and adjacently arranged with the ninth filter cavity and the eleventh filter cavity of the seventh filter branch;

and the fourth filter cavity and the sixth filter cavity of the seventh filter branch are in capacitive cross coupling, and the second filter cavity and the fourth filter cavity of the seventh filter branch and the ninth filter cavity and the eleventh filter cavity of the seventh filter branch are in inductive cross coupling respectively to form three seventh cross coupling zeros.

9. The filter of claim 8,

the arrangement structure of the first filtering cavity to the eleventh filtering cavity of the eighth filtering branch is the same as the arrangement structure of the first filtering cavity to the eleventh filtering cavity of the sixth filtering branch, and the second filtering cavity and the third filtering cavity of the eighth filtering branch are respectively adjacent to the third filtering cavity of the seventh filtering branch;

and the fourth filter cavity and the sixth filter cavity of the eighth filter branch are capacitively and cross-coupled, and the sixth filter cavity and the eighth filter cavity of the eighth filter branch, and the ninth filter cavity and the eleventh filter cavity of the eighth filter branch are inductively and cross-coupled, respectively, to form three eighth cross-coupling zeros.

10. A communication device comprising an antenna and a radio frequency unit, the antenna being connected to the radio frequency unit, the radio frequency unit comprising a filter according to any one of claims 1 to 9 for filtering radio frequency signals.