CN220672827U - Dual-passband filter and communication equipment - Google Patents
Dual-passband filter and communication equipment Download PDFInfo
- Publication number
- CN220672827U CN220672827U CN202322392850.8U CN202322392850U CN220672827U CN 220672827 U CN220672827 U CN 220672827U CN 202322392850 U CN202322392850 U CN 202322392850U CN 220672827 U CN220672827 U CN 220672827U
- Authority
- CN
- China
- Prior art keywords
- microstrip line
- circuit branch
- parallel
- line
- width
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004891 communication Methods 0.000 title claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims description 44
- 230000009977 dual effect Effects 0.000 claims description 17
- 238000002955 isolation Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The embodiment of the utility model relates to the technical field of filters, in particular to a filter and communication equipment, wherein the filter comprises a topological structure, the topological structure comprises an input end, a first parallel five-line, a first microstrip line, a second microstrip line, a third microstrip line, a fourth microstrip line, a fifth microstrip line, a sixth microstrip line, a first short-circuit branch, a second short-circuit branch, a third short-circuit branch, a fourth short-circuit branch, a second parallel five-line and an output end, one end of the second microstrip line is connected with one end of the first short-circuit branch, one end of the third microstrip line is connected with one end of the second short-circuit branch, one end of the fifth microstrip line is connected with one end of the third short-circuit branch, one end of the sixth microstrip line is connected with one end of the fourth short-circuit branch, one end of the first microstrip line is connected with the other end of the second microstrip line and the other end of the third microstrip line, and the other end of the fourth microstrip line is connected with one end of the fifth microstrip line and one end of the sixth microstrip line. Through the mode, the embodiment of the utility model realizes the characteristics of wide passband and high isolation.
Description
Technical Field
The embodiment of the utility model relates to the technical field of communication, in particular to a dual-passband filter and communication equipment.
Background
With the rapid evolution of the modern 5G wireless communication technology, the radio frequency module needs to be compatible with different communication systems to meet the increasing digital application demands of people, wherein the dual-passband filter in the radio frequency module is one of key devices in the 5G communication system.
However, in implementing embodiments of the present utility model, the inventors found that: at present, the dual-passband filter mainly adopts a parallel single-channel filter scheme, however, the dual-passband filter adopting the parallel single-channel filter scheme has the problem of narrow passband.
Disclosure of Invention
The technical problem to be solved by the embodiment of the utility model is to provide a dual-passband filter which can realize the characteristic of wide passband.
In order to solve the technical problems, the utility model adopts a technical scheme that: the utility model provides a dual-passband filter, including topological structure, topological structure includes input, first parallel five-way, first microstrip line, second microstrip line, third microstrip line, fourth microstrip line, fifth microstrip line, sixth microstrip line, first short circuit branch, second short circuit branch, third short circuit branch, fourth short circuit branch, second parallel five-way and output, the one end of second microstrip line is connected the one end of first short circuit branch, the one end of third microstrip line is connected the one end of second short circuit branch, the one end of third microstrip line is connected the one end of third short circuit branch, the one end of sixth microstrip line is connected the one end of fourth microstrip branch, the other end of second microstrip line and the other end of third microstrip line are connected to the one end of first parallel five-way, the one end of fourth microstrip line and the one end of first parallel five-way, the other end of fourth microstrip line is connected the one end of fifth microstrip line and the other end of fifth microstrip line, the other end of fourth microstrip line and the other end of fifth microstrip line are connected, the other end of fourth microstrip line and the other end of fifth microstrip line is connected, the other end of fifth microstrip line is connected to the other end of fifth microstrip line, the other end of the parallel five microstrip line is connected.
Optionally, the input end and the output end, the first parallel five line and the second parallel five line, the second microstrip line and the third microstrip line, the first short circuit branch and the second short circuit branch, the fifth microstrip line and the sixth microstrip line, and the third short circuit branch and the fourth short circuit branch are all symmetrically arranged about the first microstrip line or the fourth microstrip line.
Optionally, the first microstrip line and the fourth microstrip line, the second microstrip line and the fifth microstrip line, the first short circuit branch and the third short circuit branch, the third microstrip line and the sixth microstrip line, and the second short circuit branch and the fourth short circuit branch are arranged vertically symmetrically with respect to the first parallel five line or the second parallel five line.
Optionally, the electrical length of the first parallel five wires and the electrical length of the second parallel five wires are each a quarter wavelength corresponding to the center frequency of the stop band between the first pass band and the second pass band.
Optionally, the sum of the electrical length of the first microstrip line, the electrical length of the second microstrip line and the electrical length of the first short circuit branch is one half wavelength corresponding to the center frequency of the stop band between the first passband and the second passband;
the sum of the electric length of the first microstrip line, the electric length of the third microstrip line and the electric length of the second short circuit branch is one half wavelength corresponding to the center frequency of the stop band between the first passband and the second passband.
Optionally, the sum of the electrical length of the fourth microstrip line, the electrical length of the fifth microstrip line and the electrical length of the third short circuit branch is one half wavelength corresponding to the center frequency of the stop band between the first passband and the second passband;
the sum of the electrical length of the fourth microstrip line, the electrical length of the sixth microstrip line and the electrical length of the fourth short circuit branch is one half wavelength corresponding to the center frequency of the stop band between the first passband and the second passband.
Optionally, the width of the second microstrip line, the width of the third microstrip line, the width of the fifth microstrip line, the width of the sixth microstrip line, the width of the first short circuit branch, the width of the second short circuit branch, the width of the third short circuit branch and the width of the fourth short circuit branch are all equal, and the width of the first microstrip line is equal to the width of the fourth microstrip line;
the width of the first microstrip line and the width of the fourth microstrip line are twice the width of the second microstrip line, the width of the third microstrip line, the width of the fifth microstrip line, the width of the sixth microstrip line, the width of the first short circuit branch, the width of the second short circuit branch, the width of the third short circuit branch and the width of the fourth short circuit branch.
Optionally, the first parallel five lines include five first transmission lines, five first transmission lines are parallel and equidistant to be set up, middle one first transmission line and outside two first transmission lines's one end respectively with the input is connected, remaining two first transmission lines's one end respectively with the one end of first microstrip line and the one end of fourth microstrip line link to each other.
Optionally, the second parallel five lines include five second transmission lines, the five second transmission lines are parallel and are arranged at equal intervals, one second transmission line in the middle and two second transmission lines in the outer side are respectively connected with the output end, and one end of the other two second transmission lines is respectively connected with one end of the first microstrip line and one end of the fourth microstrip line.
In order to solve the technical problems, the utility model adopts another technical scheme that: there is provided a communication device comprising the dual-passband filter described above.
In the embodiment of the utility model, the dual-passband filter comprises a topological structure, wherein the topological structure comprises an input end, a first parallel five-line, a first microstrip line, a second microstrip line, a third microstrip line, a fourth microstrip line, a fifth microstrip line, a sixth microstrip line, a first short-circuit branch, a second short-circuit branch, a third short-circuit branch, a fourth short-circuit branch, a second parallel five-line and an output end, one end of the second microstrip line is connected with one end of the first short-circuit branch, one end of the third microstrip line is connected with one end of the second short-circuit branch, one end of the fifth microstrip line is connected with one end of the third microstrip line, one end of the sixth microstrip line is connected with one end of the fourth microstrip line, one end of the first microstrip line is connected with the other end of the third microstrip line, one end of the fourth microstrip line is connected with one end of the first parallel five-line, one end of the fourth microstrip line is connected with one end of the fifth microstrip line, one end of the fourth microstrip line is connected with one end of the fifth parallel-line, one end of the fifth microstrip line is connected with one end of the fifth microstrip line, and the other end of the fifth microstrip line is connected with one end of the fifth parallel-line, and the other end of the fifth microstrip line is connected with one end of the fifth microstrip line. The dual passband filter can achieve the characteristics of wide passband and high isolation through this topology design.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a topology of a dual passband filter provided by an embodiment of the present utility model;
FIG. 2 is a layout of a dual passband filter provided by an embodiment of the present utility model;
FIG. 3 is a further layout of a dual passband filter provided by an embodiment of the present utility model;
fig. 4 is an S-parameter simulation diagram of a dual-passband filter according to an embodiment of the present utility model.
Reference numerals illustrate:
10. an input end; 20. a first parallel five lines; 201. three first transmission lines forming the middle and two sides of the first parallel five lines; 202. two other first transmission lines forming a first parallel five line; 30. a first microstrip line; 31. a second microstrip line; 32. a third microstrip line; 33. a fourth microstrip line; 34. a fifth microstrip line; 35. a sixth microstrip line; 40. a first short circuit branch; 41. a second short circuit branch; 42. third short circuit branches; 43. fourth short circuit branches; 50. a second parallel five lines; 501. three second transmission lines forming the middle and two sides of the second parallel five lines; 502. two other second transmission lines forming a second parallel five line; 60. and an output terminal.
Detailed Description
In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "locked" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2, the dual-passband filter includes a topology structure including an input terminal 10, a first parallel five line 20, a first microstrip line 30, a second microstrip line 31, a third microstrip line 32, a fourth microstrip line 33, a fifth microstrip line 34, a sixth microstrip line 35, a first short-circuit branch 40, a second short-circuit branch 41, a third short-circuit branch 42, a fourth short-circuit branch 43, a second parallel five line 50 and an output terminal 60, one end of the second microstrip line 31 is connected with one end of the first short-circuit branch 40, one end of the third microstrip line 32 is connected with one end of the second short-circuit branch 41, one end of the fifth microstrip line 34 is connected with one end of the third short-circuit branch 42, one end of the sixth microstrip line 35 is connected with one end of the fourth microstrip line 43, one end of the first microstrip line 30 is connected with the other end of the third microstrip line 32, the other end of the first microstrip line 30 is connected with one end of the first parallel five line 20, one end of the fourth microstrip line 33 is connected with one end of the fifth microstrip line 50, the other end of the fifth microstrip line 30 is connected with one end of the fifth microstrip line 50, the other end of the fifth microstrip line 33 is connected with one end of the fifth microstrip line 50, and the other end of the fifth microstrip line 50 is connected with one end of the fifth microstrip line 50, the other end of the fifth microstrip line 30 is connected with one end of the other end of the fifth microstrip line 50.
In some embodiments, the input end 10 and the output end 60, the first parallel five line 20 and the second parallel five line 50, the second microstrip line 31 and the third microstrip line 32, the first short-circuit branch 40 and the second short-circuit branch 41, the fifth microstrip line 34 and the sixth microstrip line 35, the third short-circuit branch 42 and the fourth short-circuit branch 43 are all symmetrically arranged about the first microstrip line 30 or the fourth microstrip line 33, and further, the first microstrip line 30 and the fourth microstrip line 33, the second microstrip line 31 and the fifth microstrip line 34, the first short-circuit branch 40 and the third short-circuit branch 42, the third microstrip line 32 and the sixth microstrip line 35, the second short-circuit branch 41 and the fourth short-circuit branch 43 are symmetrically arranged about the first parallel five line 20 or the second parallel five line 50. By the above-mentioned symmetrically arranged topology structure, the lengths and widths of the first parallel five line 20 and the second parallel five line 50 are respectively equal, the lengths and widths of the first microstrip line 30 and the fourth microstrip line 33 are respectively equal, the lengths and widths of the second microstrip line 31, the third microstrip line 32, the fifth microstrip line 34 and the sixth microstrip line 35 are respectively equal, and the lengths and widths of the first short-circuit branch 40, the second short-circuit branch 41, the third short-circuit branch 42 and the fourth short-circuit branch 43 are respectively equal, so that the design process of the dual-passband filter is simplified.
In some embodiments, the first parallel five line 20, the second parallel five line 50, the second microstrip line 31, the third microstrip line 32, the fifth microstrip line 34, the sixth microstrip line 35 are perpendicular to the first microstrip line 30 and the fourth microstrip line 33. Further, the first shorting stub 40 is perpendicular to the second microstrip line 31, the second shorting stub 41 is perpendicular to the third microstrip line 32, the third shorting stub 42 is perpendicular to the fifth microstrip line 34, and the fourth shorting stub 43 is perpendicular to the sixth microstrip line 35.
In some embodiments, the electrical length of the first parallel five wire 20 and the electrical length of the second parallel five wire 50 are one quarter wavelength corresponding to the center frequency of the stop band between the first pass band and the second pass band.
In some embodiments, the sum of the electrical length of the first microstrip line 30, the electrical length of the second microstrip line 31, and the electrical length of the first shorting stub 40 is one half wavelength corresponding to the center frequency of the stop band between the first passband and the second passband, and the sum of the electrical length of the first microstrip line 30, the electrical length of the third microstrip line 32, and the electrical length of the second shorting stub 41 is one half wavelength corresponding to the center frequency of the stop band between the first passband and the second passband.
In some embodiments, the sum of the electrical length of the fourth microstrip line 33, the electrical length of the fifth microstrip line 34, and the electrical length of the third shorting stub 42 is one half wavelength corresponding to the center frequency of the stop band between the first pass band and the second pass band, and the sum of the electrical length of the fourth microstrip line 33, the electrical length of the sixth microstrip line 35, and the electrical length of the fourth shorting stub 43 is one half wavelength corresponding to the center frequency of the stop band between the first pass band and the second pass band.
In some embodiments, the width of the second microstrip line 31, the width of the third microstrip line 32, the width of the fifth microstrip line 34, the width of the sixth microstrip line 35, the width of the first shorting stub 40, the width of the second shorting stub 41, the width of the third shorting stub 42, and the width of the fourth shorting stub 43 are all equal, and the width of the first microstrip line 30 and the width of the fourth microstrip line 33 are twice the width of the second microstrip line 31, the width of the third microstrip line 32, the width of the fifth microstrip line 34, the width of the sixth microstrip line 35, the width of the first shorting stub 40, the width of the second shorting stub 41, the width of the third shorting stub 42, and the width of the fourth shorting stub 43.
For the first parallel five lines 20, referring to fig. 2 and 3, the first parallel five lines 20 include five first transmission lines: the transmission lines 201 and 202 forming the first parallel five line 20 are parallel and equally spaced, one end of the three first transmission lines 201 is connected with the input end 10, and one end of the two first transmission lines 202 is connected with one end of the first microstrip line 30 and one end of the fourth microstrip line 33.
For the second parallel five lines 50, referring to fig. 2 and 3, the second parallel five lines 50 include five second transmission lines: the middle and outer three second transmission lines 501 and the remaining two second transmission lines 502 are arranged in parallel and at equal intervals, the second transmission lines 501 and 502 forming the second parallel five line 50, one end of the three second transmission lines 501 is respectively connected with the output end 60, and one end of the two second transmission lines 502 is respectively connected with one end of the first microstrip line 30 and one end of the fourth microstrip line 33.
In some embodiments, the dual-channel filter based on topology is described, and the design parameters only include the width of the first transmission lines 201, 202 that make up the first parallel five line 20, the pitch of any two adjacent first transmission lines 201, 202 that make up the first parallel five line 20, and the width of the first microstrip line. Through the mode, the design parameters of the dual-passband filter are reduced, and the design complexity is reduced.
Further, the length of the second microstrip line 31, the length of the third microstrip line 32, the length of the fifth microstrip line 34 and the length of the sixth microstrip line 35 are all greater than the length of the first shorting stub 40, the length of the second shorting stub 41, the length of the third shorting stub 42 and the length of the fourth shorting stub 43.
In order to verify the conception of the dual-passband filter according to the embodiment of the present utility model, the following physical simulation experiments are performed:
the dual-passband filter of the embodiment of the utility model is physically designed on a Rogers RO4003B circuit board, the dielectric constant of the circuit board is 3.38, the dielectric loss of the circuit board is 0.0022, and the thickness of the circuit board is 0.813mm.
The layout of the dual-passband filter can be obtained after optimization of the simulation software, as shown in fig. 3. The circuit board dimensions were 29.0mm and 17.0mm. The design parameters of the dual-passband filter are: l (L) P ＝11.7mm,w P ＝0.1mm,s P ＝0.07mm,w 1 ＝2w 2 ＝2w 3 ＝1.8mm,l 1 ＝15.3mm,l 2 ＝11.8mm,l 3 =5.75 mm. Wherein l P Length, w, of the first and second parallel lines 20, 50 P For the width s of the first transmission lines 201, 202 constituting the first parallel five line 20 and the second transmission lines 501, 502 of the second parallel five line 50 P The spacing of any two adjacent first transmission lines 201, 202 constituting a first parallel five line 20 and the spacing of any two adjacent second transmission lines 501, 502 constituting a second parallel five line 50, w 1 The width w of the first microstrip line 30 and the fourth microstrip line 33 2 Widths w of the second microstrip line 31, the third microstrip line 32, the fifth microstrip line 34, and the sixth microstrip line 35 3 Is the width l of the first short-circuit branch 40, the second short-circuit branch 41, the third short-circuit branch 42 and the fourth short-circuit branch 43 1 Is the sum of the length of the first microstrip line 30 and the length of the fourth microstrip line 33, l 2 Length l of the second microstrip line 31, the third microstrip line 32, the fifth microstrip line 34 and the sixth microstrip line 35 3 Is the length of the first short stub 40, the second short stub 41, the third short stub 42 and the fourth short stub 43.
As shown in FIG. 4, in the first passband, the impedance bandwidth range with the reflection coefficient smaller than-10 dB is 1.447-2.485 GHz, the passband center frequency is 1.966GHz, the absolute bandwidth of the passband is 1.038GHz, and the relative bandwidth of the passband is 52.8%; in the second passband, the impedance bandwidth range with the reflection coefficient smaller than-10 dB is 5.618 to 6.922GHz, the passband center frequency is 6.27GHz, the absolute bandwidth of the passband is 1.304GHz, and the relative bandwidth of the passband is 20.8%; within the stopband in the middle of the two passband, the stopband bandwidth with the isolation degree larger than 15dB ranges from 3.512 to 4.458GHz, the stopband center frequency is 3.985GHz, the stopband absolute bandwidth is 0.946GHz, and the stopband relative bandwidth is 23.7%. From the simulation results, it can be seen that the bandwidths of the first passband and the second passband are almost identical, and the bandwidths of the first passband and the second passband are symmetrically distributed about the center frequency of the stopband in the middle of the two passbands.
Two transmission poles are arranged in the first passband and are respectively positioned at 1.558GHz and 2.185GHz; within the second passband are two transmission poles, located at 5.955GHz and 6.803GHz, respectively. The two transmission poles located in the first pass band and the two transmission poles located in the second pass band ensure flatness of the dual pass band filter in the pass band.
Six transmission zeros are also located in the stop band at 0,3.944,4.323,7.918,8.724,8.905ghz, respectively. The six transmission zeroes ensure not only high selectivity of the dual passband filter, but also high isolation characteristics of the stopband in the middle of the two passband.
In the embodiment of the present utility model, the dual-passband filter includes a topology structure, where the topology structure includes an input terminal 10, a first parallel five line 20, a first microstrip line 30, a second microstrip line 31, a third microstrip line 32, a fourth microstrip line 33, a fifth microstrip line 34, a sixth microstrip line 35, a first short-circuit branch 40, a second short-circuit branch 41, a third short-circuit branch 42, a fourth short-circuit branch 43, a second parallel five line 50 and an output terminal 60, one end of the second microstrip line 31 is connected to one end of the first short-circuit branch 40, one end of the third microstrip line 32 is connected to one end of the second short-circuit branch 41, one end of the fifth microstrip line 34 is connected to one end of the third short-circuit branch 42, one end of the sixth microstrip line 35 is connected to one end of the fourth microstrip line 43, one end of the first microstrip line 30 is connected to the other end of the second microstrip line 31, the other end of the first microstrip line 30 is connected to one end of the third microstrip line 32, the other end of the first microstrip line 30 is connected to one end of the first parallel five line 20, one end of the fourth microstrip line 33 is connected to one end of the fifth microstrip line 50, and the other end of the fifth microstrip line is connected to one end of the fifth microstrip line 50 is connected to one end of the other end of the microstrip line is connected to the fifth microstrip line 50. The dual passband filter can achieve the characteristics of wide passband and high isolation through this topology design.
The present utility model also provides an embodiment of a communication device, where the communication device includes the dual-passband filter, and the structure and the function of the dual-passband filter can refer to the above embodiment, which is not described herein in detail.
It should be noted that the description of the present utility model and the accompanying drawings illustrate preferred embodiments of the present utility model, but the present utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are not to be construed as additional limitations of the utility model, but are provided for a more thorough understanding of the present utility model. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present utility model described in the specification; further, modifications and variations of the present utility model may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this utility model as defined in the appended claims.
Claims (10)
1. A dual passband filter comprising:
the topological structure comprises an input end, a first parallel five-way line, a first microstrip line, a second microstrip line, a third microstrip line, a fourth microstrip line, a fifth microstrip line, a sixth microstrip line, a first short-circuit branch, a second short-circuit branch, a third short-circuit branch, a fourth short-circuit branch, a second parallel five-way line and an output end, one end of the second microstrip line is connected with one end of the first short-circuit branch, one end of the third microstrip line is connected with one end of the second short-circuit branch, one end of the fifth microstrip line is connected with one end of the third short-circuit branch, one end of the sixth microstrip line is connected with one end of the fourth microstrip line, one end of the first microstrip line is connected with one end of the first parallel five-way line, one end of the fourth microstrip line is connected with one end of the second parallel five-way line, one end of the fourth microstrip line is connected with one end of the fourth microstrip line, one end of the fourth microstrip line is connected with one end of the fifth microstrip line, one end of the fourth parallel five-way line is connected with one end of the first parallel five-way line, one end of the first parallel five-way line is connected with one end of the first parallel microstrip line, one end of the first parallel five-way line is connected with one end of the first microstrip line, and the other end of the first parallel five-parallel line is connected with the other end of the microstrip line is connected with the other end of the first parallel microstrip line.
2. The dual passband filter of claim 1, wherein,
the input end and the output end, the first parallel five lines and the second parallel five lines, the second microstrip line and the third microstrip line, the first short circuit branch and the second short circuit branch, the fifth microstrip line and the sixth microstrip line, and the third short circuit branch and the fourth short circuit branch are all symmetrically arranged about the first microstrip line or the fourth microstrip line.
3. The dual passband filter of claim 1, wherein,
the first microstrip line and the fourth microstrip line, the second microstrip line and the fifth microstrip line, the first short circuit branch and the third short circuit branch, the third microstrip line and the sixth microstrip line, and the second short circuit branch and the fourth short circuit branch are arranged in up-and-down symmetry with respect to the first parallel five line or the second parallel five line.
4. The dual passband filter of claim 1, wherein,
the electrical length of the first parallel five wires and the electrical length of the second parallel five wires are each a quarter wavelength corresponding to the center frequency of the stop band between the first pass band and the second pass band.
5. The dual passband filter of claim 1, wherein,
the sum of the electric length of the first microstrip line, the electric length of the second microstrip line and the electric length of the first short circuit branch is one half wavelength corresponding to the center frequency of the stop band between the first passband and the second passband;
the sum of the electric length of the first microstrip line, the electric length of the third microstrip line and the electric length of the second short circuit branch is one half wavelength corresponding to the center frequency of the stop band between the first passband and the second passband.
6. The dual passband filter of claim 1, wherein,
the sum of the electrical length of the fourth microstrip line, the electrical length of the fifth microstrip line and the electrical length of the third short circuit branch is one half wavelength corresponding to the center frequency of the stop band between the first passband and the second passband;
the sum of the electrical length of the fourth microstrip line, the electrical length of the sixth microstrip line and the electrical length of the fourth short circuit branch is one half wavelength corresponding to the center frequency of the stop band between the first passband and the second passband.
7. The dual passband filter of claim 1, wherein,
the width of the second microstrip line, the width of the third microstrip line, the width of the fifth microstrip line, the width of the sixth microstrip line, the width of the first short circuit branch, the width of the second short circuit branch, the width of the third short circuit branch and the width of the fourth short circuit branch are all equal, and the width of the first microstrip line is equal to the width of the fourth microstrip line;
the width of the first microstrip line and the width of the fourth microstrip line are twice the width of the second microstrip line, the width of the third microstrip line, the width of the fifth microstrip line, the width of the sixth microstrip line, the width of the first short circuit branch, the width of the second short circuit branch, the width of the third short circuit branch and the width of the fourth short circuit branch.
8. The dual passband filter of claim 1, wherein,
the first parallel five lines comprise five first transmission lines which are parallel and arranged at equal intervals, one end of each of the first transmission lines and one end of each of the two outer transmission lines are connected with the input end, and one end of each of the other two first transmission lines is connected with one end of each of the first microstrip lines and one end of each of the fourth microstrip lines.
9. The dual passband filter of claim 1, wherein,
the second parallel five lines comprise five second transmission lines which are parallel and arranged at equal intervals, one end of each of the second transmission lines and one end of each of the two outer transmission lines are connected with the output end, and one end of each of the other two second transmission lines is connected with one end of each of the first microstrip lines and one end of each of the fourth microstrip lines.
10. A communication device comprising a dual passband filter as claimed in any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322392850.8U CN220672827U (en) | 2023-09-01 | 2023-09-01 | Dual-passband filter and communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322392850.8U CN220672827U (en) | 2023-09-01 | 2023-09-01 | Dual-passband filter and communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220672827U true CN220672827U (en) | 2024-03-26 |
Family
ID=90338848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322392850.8U Active CN220672827U (en) | 2023-09-01 | 2023-09-01 | Dual-passband filter and communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220672827U (en) |
-
2023
- 2023-09-01 CN CN202322392850.8U patent/CN220672827U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109301422B (en) | Half-mode substrate integrated waveguide-based filtering power divider | |
| CN106935948A (en) | A kind of work(filter-divider | |
| CN107275740A (en) | It is a kind of that there is the dual-frequency power divider for transmitting null character | |
| CN109273807A (en) | A kind of novel four function filter-divider of high performance wideband | |
| CN220672827U (en) | Dual-passband filter and communication equipment | |
| CN220510222U (en) | Dual-passband filter and communication equipment | |
| CN220798235U (en) | Dual-passband filter and communication equipment | |
| CN115939713A (en) | Power divider and communication equipment | |
| CN113131112B (en) | Miniaturized band-pass LTCC filter with embedded SIR branches | |
| CN220964838U (en) | Topological structure, filter and communication equipment | |
| CN112133992B (en) | Filtering power divider with high out-of-band rejection and full-band absorption functions | |
| CN220963707U (en) | Topological structure, band elimination filter and communication equipment | |
| CN110137644B (en) | High-selectivity wide-stop-band balance filter based on slot line | |
| CN220628194U (en) | Topological structure of compact type wide passband filter and filter | |
| CN220798234U (en) | Topological structure, filter and communication equipment | |
| Rahim et al. | Microstrip dual-band bandpass filter for ISM band applications | |
| CN117239376A (en) | Topological structure, dual-passband filter and communication equipment | |
| CN108110389B (en) | Miniaturized microstrip hairpin line filter with high near-end rejection | |
| CN221328077U (en) | Filter and communication equipment | |
| CN221176618U (en) | Topological structure and five-order miniaturized wide passband filter | |
| CN220895819U (en) | Topological structure of broadband band-stop filter with narrow pass characteristic and filter | |
| CN221226534U (en) | Filter and communication equipment | |
| CN221328076U (en) | Ultra-wideband filter and communication equipment | |
| CN221328080U (en) | Topological structure and filter | |
| CN220672826U (en) | Notch-controllable filter and communication equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |