CN115149229B - Balanced filter - Google Patents
Balanced filter Download PDFInfo
- Publication number
- CN115149229B CN115149229B CN202210837023.2A CN202210837023A CN115149229B CN 115149229 B CN115149229 B CN 115149229B CN 202210837023 A CN202210837023 A CN 202210837023A CN 115149229 B CN115149229 B CN 115149229B
- Authority
- CN
- China
- Prior art keywords
- resonator
- patch
- microstrip
- microstrip line
- gap
- 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
- 230000005284 excitation Effects 0.000 claims abstract description 18
- 230000001629 suppression Effects 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 claims description 56
- 238000010168 coupling process Methods 0.000 claims description 56
- 238000005859 coupling reaction Methods 0.000 claims description 56
- 238000005452 bending Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004891 communication Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The application provides a balance filter, which comprises a pair of input feeder structures and a pair of output feeder structures which are symmetrically arranged, a first patch resonator and a second patch resonator which are symmetrically arranged, and a first microstrip line resonator and a second microstrip line resonator which are symmetrically arranged; the first patch resonator and the second patch resonator generate a first passband under the electromagnetic excitation effect; the first microstrip line resonator and the second microstrip line resonator generate a second passband under the electromagnetic excitation effect; the first patch resonator and the second patch resonator are patches, and the patches are provided with grooves for adjusting the first pass band so as to be used for common mode frequency suppression of the first pass band and the second pass band; the first microstrip line resonator and the second microstrip line resonator are accommodated in the groove. The balance filter has a simple structure when realizing double frequency bands, and can flexibly regulate and control each frequency band, enhance the design flexibility, improve the suppression degree of common mode noise and realize miniaturization.
Description
Technical Field
The disclosed embodiments of the present application relate to the field of wireless communication technology, and more particularly, to a balanced filter.
Background
In recent years, modern wireless communication technologies represented by 5G mobile communication are rapidly developed, and the requirements for multi-mode, multi-mode and multi-service communication are becoming stronger. However, the large-scale arrangement of communication networks and the high integration of systems, the radio frequency front-end electromagnetic interference and the signal crosstalk between its modules greatly affect the communication performance, wherein the common-mode interference signal causes radiation power loss in the millimeter wave spectrum (26-40 GHz) even up to 25% of the input power, which greatly reduces the communication quality. The research shows that the balance device has strong resistance to interference signals, low radio frequency noise and high degree of freedom, and is concerned and researched.
Therefore, in order to meet the increasing demands for multifunctional systems in modern wireless communication (such as 5G systems), and to cope with complex and variable electromagnetic noise interference environments, it is of great importance to research and design balanced filters with excellent noise immunity.
However, the number of frequency bands of the balance filter at present cannot meet the current multi-service communication requirement, especially the coexistence situation of multi-system communication systems in the 5G communication era.
Disclosure of Invention
According to an embodiment of the present application, the present application proposes a balance filter that solves the above-mentioned problems.
In accordance with aspects of the present application, an exemplary balanced filter is disclosed. The exemplary balanced filter includes a pair of input feed line structures and a pair of output feed line structures that are symmetrically disposed, a first patch resonator and a second patch resonator that are symmetrically disposed, and a first microstrip line resonator and a second microstrip line resonator that are symmetrically disposed; wherein the pair of input feed line structures and the pair of output feed line structures are symmetrically disposed about a first direction and the pair of input feed line structures are coupled with the first patch resonator and the second patch resonator slots, the pair of output feed line structures being coupled with the first patch resonator and the second patch resonator slots to provide electromagnetic excitation; the first patch resonator and the second patch resonator are symmetrically arranged about a second direction and are in gap coupling so as to generate a first passband under the action of electromagnetic excitation, wherein the second direction is perpendicular to the first direction; the first microstrip line resonator and the second microstrip line resonator are symmetrically arranged about the second direction and are in gap coupling so as to generate a second passband under the action of electromagnetic excitation; the first patch resonator and the second patch resonator are patches symmetrically arranged relative to the first direction, and grooves are formed in the patches at symmetrical positions of the patches on one side of gap coupling between the first patch resonator and the second patch resonator and used for adjusting the first passband so as to be used for common mode frequency suppression of the first passband and the second passband; the first microstrip line resonator is accommodated in the groove of the first patch resonator, and the second microstrip line resonator is accommodated in the groove of the second patch resonator.
In some embodiments, the first microstrip resonator and the second microstrip resonator are each microstrip lines symmetrically disposed with respect to the first direction.
In some embodiments, the first microstrip resonator is folded in a slot of the first patch resonator, and the second microstrip resonator is folded in a slot of the second patch resonator.
In some embodiments, the microstrip line includes first and second bending structures symmetrically disposed about the first direction and a connection portion connecting the first and second bending structures.
In some embodiments, the first bending structure and the second bending structure each include a first portion, a second portion, and a third portion connected between the first portion and the second portion, wherein the first portion and the second portion are parallel and correspondingly disposed, and the third portion is perpendicular to the first portion and the second portion.
In some embodiments, the length of the third portion is equal to the length of the connecting portion; the third section is configured to implement gap coupling between the first microstrip resonator and the second microstrip resonator.
In some embodiments, the length of the first portion is greater than the length of the second portion.
In some embodiments, the patch is rectangular in shape and the slot is rectangular in shape, the slot having a length that is parallel to the width of the patch.
In some embodiments, the gap between the first patch resonator and the second patch resonator is a first gap for gap coupling between the first patch resonator and the second patch resonator; the gap between the first microstrip line resonator and the second microstrip line resonator is a second gap, so as to be used for gap coupling between the first microstrip line resonator and the second microstrip line resonator; wherein the first gap is larger than the second gap.
In some embodiments, the pair of input feed line structures comprises a first input feed line structure and a second input feed line structure arranged symmetrically, and the pair of output feed line structures comprises a first output feed line structure and a second output feed line structure arranged symmetrically;
wherein each of the first input feeder structure, the second input feeder structure, the first output feeder structure, and the second output feeder structure includes a feeding portion, a first coupling portion, and a second coupling portion, wherein the first coupling portion and the second coupling portion are respectively connected with one end of the feeding portion, the other end of the feeding portion serves as an input/output port, and the first coupling portion and the second coupling portion are used for realizing slot coupling.
The beneficial effects of this application are: the first patch resonator and the second patch resonator are symmetrically arranged in the second direction and are in gap coupling so as to generate a first passband under the action of electromagnetic excitation, the first microstrip line resonator and the second microstrip line resonator are symmetrically arranged in the second direction and are in gap coupling so as to generate a second passband under the action of electromagnetic excitation, a balance filter with a simple structure and double frequency bands is realized, each frequency band can be flexibly regulated and controlled, the design flexibility is enhanced, the patch is symmetrically arranged relative to the first direction through the first patch resonator and the second patch resonator, a slot is formed in one side of the gap coupling between the first patch resonator and the second patch resonator and at the symmetrical position of the patch so as to be used for common mode frequency suppression of the first passband and the second passband, the suppression degree of common mode noise is improved, the balance filter with good performance is realized, in addition, the first microstrip line resonator is accommodated in the slot of the first patch resonator, the second microstrip line resonator is accommodated in the slot of the second patch resonator, and the manufacturing cost is reduced.
These and other objects of the present application will no doubt become obvious to those of ordinary skill in the art after having read the following detailed description of the preferred embodiments which are illustrated in the various drawing figures and drawings.
Drawings
Fig. 1 is a schematic diagram of a balanced filter according to an embodiment of the present application.
Fig. 2 is a plot of scattering parameters of a balance filter according to an embodiment of the present application.
Fig. 3 is a partially enlarged scattering parameter plot of a balance filter according to an embodiment of the present application.
Detailed Description
Certain terms are used throughout the description and claims to refer to particular components. As will be appreciated by those skilled in the art, electronic device manufacturers may refer to a component by different names. The components are not distinguished by name herein, but rather by function. In the following description and claims, the terms "include" and "comprise" are defined as open-ended terms, and thus should be interpreted to mean "include, but not limited to …". In addition, the term "coupled" is intended to mean either an indirect electrical connection or a direct electrical connection. Thus, when one device is coupled to another device, then such connection may be a direct electrical connection or an indirect electrical connection via other devices and connections w3.
Fig. 1 is a schematic structural diagram of a balance filter according to an embodiment of the present application. The balanced filter 100 includes a pair of input feed line structures 110 and a pair of output feed line structures 120 that are symmetrically disposed, a first patch resonator 130 and a second patch resonator 140 that are symmetrically disposed, and a first microstrip line resonator 150 and a second microstrip line resonator 160 that are symmetrically disposed.
Wherein the pair of input feed line structures 110 and the pair of output feed line structures 120 are symmetrically arranged about the first direction, and the pair of input feed line structures 110 are gap-coupled with the first patch resonator 130 and the second patch resonator 140, and the pair of output feed line structures 120 are gap-coupled with the first patch resonator 130 and the second patch resonator 140 to provide electromagnetic excitation.
The first patch resonator 130 and the second patch resonator 140 are symmetrically disposed about a second direction and gap-coupled to produce a first passband under electromagnetic excitation, wherein the second direction is perpendicular to the first direction.
The first microstrip resonator 150 and the second microstrip resonator 160 are symmetrically disposed about the second direction and are gap-coupled to produce a second passband under electromagnetic excitation.
The symmetrical arrangement of the pair of input feed line structures 110 and the pair of output feed line structures 120, the symmetrical arrangement of the first patch resonator 130 and the second patch resonator 140, and the symmetrical arrangement of the first microstrip line resonator 150 and the second microstrip line resonator 160 may be arranged according to practical circuit design considerations. In the present embodiment, the pair of input feeder structures 110 and the pair of output feeder structures 120 are symmetrically disposed about a first direction, the first patch resonator 130 and the second patch resonator 140, and the first microstrip line resonator 150 and the second microstrip line resonator 160 are symmetrically disposed about a second direction, and the second direction is perpendicular to the first direction. The first direction may be a horizontal direction and the second direction may be a vertical direction. In other embodiments, the pair of input feed line structures 110 and the pair of output feed line structures 120 may be symmetrically arranged about one inclined line, i.e. the first direction is one inclined line direction, e.g. 45 ° inclined line, and the first microstrip line resonator 150 and the second microstrip line resonator 160 are symmetrically arranged about the other inclined line, i.e. the second direction is the other inclined line, e.g. 135 ° inclined line.
The first patch resonator 130 and the second patch resonator 140 generate a first passband under electromagnetic excitation, and the first microstrip line resonator 150 and the second microstrip line resonator 160 generate a second passband under electromagnetic excitation, wherein a center frequency of the first passband is lower than a center frequency of the second passband, that is, the second passband is located at a high frequency portion of the first passband. It can be seen that the structure of the balance filter 100 is designed based on the combination of the first and second patch resonators 130 and 140 and the first and second microstrip line resonators 150 and 160.
The first patch resonator 130 and the second patch resonator 140 are patches t symmetrically arranged relative to the first direction, and the patches t are provided with slots c from one side of the gap coupling between the first patch resonator 130 and the second patch resonator 140 and at symmetrical positions of the patches t for adjusting the first passband so as to be used for common mode frequency suppression of the first passband and the second passband;
the first microstrip line resonator 150 is accommodated in the slot c of the first patch resonator 130, and the second microstrip line resonator 160 is accommodated in the slot c of the second patch resonator 140.
The first patch resonator 130 and the second patch resonator 140 are each a patch t, for example, a rectangular patch t. Under electromagnetic excitation, the patch t may generate a differential mode frequency for forming the center frequency of the first passband. The patch t is formed with a slot c from one side of the gap coupling between the first patch resonator 130 and the second patch resonator 140 and at a symmetrical position of the patch t, i.e., the patch t is formed with a slot c from one side of the gap coupling between the first patch resonator 130 and the second patch resonator 140 and at a symmetrical position of the patch t, recessed toward the other side of the gap coupling between the first patch resonator 130 and the second patch resonator 140.
For example, the first patch resonator 130 is recessed toward the left side from the side thereof coupled with the gap between the second patch resonator 140, i.e., the right side, and at the symmetrical position of the first patch resonator 130, a groove c is formed, and the second patch resonator 140 is recessed toward the right side from the side thereof coupled with the gap between the first patch resonator 130, i.e., the left side, and at the symmetrical position of the second patch resonator 140, a groove c is formed.
The formed groove c is used for adjusting the differential mode frequency generated by the patch t, namely adjusting the center frequency of the first passband, so that the differential mode frequency generated by the patch t is far away from the common mode frequency, and the common mode frequency suppression of the first passband and the second passband is realized.
The first microstrip resonator 150 and the second microstrip resonator 160 are half-wavelength resonators. The first microstrip line resonator 150 is accommodated in the slot c of the first patch resonator 130, i.e., the first microstrip line resonator 150 is embedded in the slot c of the first patch resonator 130, and the second microstrip line resonator 160 is accommodated in the slot c of the second patch resonator 140, i.e., the second microstrip line resonator 160 is embedded in the slot c of the second patch resonator 140. The first microstrip resonator 150 and the second microstrip resonator 160 are in the slot c, and can be subjected to various bending treatments, so that space layout is reasonably utilized, miniaturization is realized, and manufacturing cost is reduced.
In this embodiment, the first patch resonator 130 and the second patch resonator 140 are symmetrically arranged about the second direction and are in gap coupling so as to generate a first passband under the electromagnetic excitation effect, the first microstrip line resonator 150 and the second microstrip line resonator 160 are symmetrically arranged about the second direction and are in gap coupling so as to generate a second passband under the electromagnetic excitation effect, so that the dual-band balanced filter 100 with simple structure is realized, each frequency band can be flexibly regulated and controlled, the design flexibility is enhanced, and the patch t is formed by symmetrically arranging the first patch resonator 130 and the second patch resonator 140 relative to the first direction, and a slot c is formed at one side of the gap coupling between the first patch resonator 130 and the second patch resonator 140 and at the symmetrical position of the patch t so as to be used for common mode frequency suppression of the first passband and the second passband, so that the suppression degree of common mode noise is improved, and the dual-band balanced filter 100 with good performance is realized.
As described above, the first microstrip resonator 150 and the second microstrip resonator 160 are each half-wavelength resonators. In some embodiments, the first microstrip resonator 150 and the second microstrip resonator 160 are each a microstrip w symmetrically disposed with respect to the first direction. The microstrip line w may be a half-wavelength microstrip line. The first direction may be a horizontal direction or a vertical direction.
As described above, the first microstrip resonator 150 is accommodated in the slot c of the first patch resonator 130, and the second microstrip resonator 160 is accommodated in the slot c of the second patch resonator 140. In some embodiments, the first microstrip resonator 150 is folded in the slot c of the first patch resonator 130, and the second microstrip resonator 160 is folded in the slot c of the second patch resonator 140.
The first microstrip resonator 150 is bent in the groove c of the first patch resonator 130, the second microstrip resonator 160 is bent in the groove c of the second patch resonator 140, that is, the microstrip lines w of the first microstrip resonator 150 and the second microstrip resonator 160 are bent in the groove c of the patch t, so that the space layout is reasonably utilized, the miniaturization is realized, and the manufacturing cost is reduced. In addition, the microstrip lines w of the first microstrip line resonator 150 and the second microstrip line resonator 160 are bent to cancel each other out the energy in the microstrip lines w, so that a weaker coupling strength can be obtained at the same coupling pitch.
In some embodiments, the microstrip line w includes a first bending structure w1 and a second bending structure w2 symmetrically disposed about the first direction, and a connection portion w3 connecting the first bending structure w1 and the second bending structure w 2.
The first bending structure w1 and the second bending structure w2 may be U-shaped bending structures, that is, the portions of the microstrip line w corresponding to the first bending structure w1 and the second bending structure w2 are bent 2 times, and the connecting portion w3 connects the first bending structure w1 and the second bending structure w2, that is, the connecting portion w3 is connected between one end of the first bending structure w1 and one end of the second bending structure w 2.
Note that bending of the portion on the microstrip line w once means bending the portion once by 90 degrees.
As described above, the first bending structure w1 and the second bending structure w2 may be U-shaped bending structures, that is, the portions corresponding to the first bending structure w1 and the second bending structure w2 are bent 2 times, in some embodiments, the first bending structure w1 and the second bending structure w2 each include a first portion x1, a second portion x2, and a third portion x3 connected between the first portion x1 and the second portion x2, where the first portion x1 and the second portion x2 are parallel and correspondingly disposed, and the third portion x3 is perpendicular to the first portion x1 and the second portion x 2.
The first portion x1 and the second portion x2 are parallel and correspondingly arranged, the third portion x3 is perpendicular to the first portion x1 and the second portion x2, that is, the corresponding portions of the first bending structure w1 and the second bending structure w2 extend from one end (that is, one end of the first portion x 1) of the corresponding portions towards the first direction, to the other end of the first portion x1, after being bent for 1 time, to the third portion x3, and after being bent for 1 time, to one end of the second portion x2, and extend towards the opposite direction of the first direction to the other end of the second portion x 2.
The lengths of the first, second and third portions x1, x2 and x3 are determined according to the size of the groove c formed on the patch t. The length of the first and second portions x1 and x2 may be greater than the length of the third portion x 3.
Further, in some examples, the length of the third portion x3 is equal to the length of the connecting portion w 3; the third portion x3 is used to achieve gap coupling between the first microstrip line resonator 150 and the second microstrip line resonator 160.
The length of the third portion x3 is equal to the length of the connecting portion w3, so that the energy of the microstrip line resonator is better offset.
Further, in some examples, the length of the first portion x1 is greater than the length of the second portion x 2.
As described above, the first patch resonator 130 and the second patch resonator 140 are each the patch t. In some embodiments, patch t is rectangular in shape and slot c is rectangular in shape, with the length direction of slot c being parallel to the width direction of patch t.
The length direction of the slot c is parallel to the width direction of the patch t, i.e., the length direction of the slot c is perpendicular to the length direction of the patch t.
In the example where the patch t is rectangular in shape, a pair of input feed line structures 110 are coupled with the width-direction slits of the first patch resonator 130 and the second patch resonator 140, and a pair of output feed line structures 120 are coupled with the width-direction slits of the first patch resonator 130 and the second patch resonator 140.
As described above, the first patch resonator 130 and the second patch resonator 140 are gap-coupled, and the first microstrip line resonator 150 and the second microstrip line resonator 160 are gap-coupled. In some embodiments, as shown in fig. 1, the gap between the first patch resonator 130 and the second patch resonator 140 is a first gap f1 for gap coupling between the first patch resonator 130 and the second patch resonator 140; the gap between the first microstrip line resonator 150 and the second microstrip line resonator 160 is a second gap f2 for gap coupling between the first microstrip line resonator 150 and the second microstrip line resonator 160; wherein the first gap f1 is larger than the second gap f2.
As mentioned above, the pair of input feed line structures 110 and the pair of output feed line structures 120 are symmetrically arranged about the first direction, for example, horizontally symmetrically arranged, and in some embodiments, the pair of input feed line structures 110 are themselves symmetrically arranged, and the pair of output feed line structures 120 are themselves symmetrically arranged. For example, the pair of input feed line structures 110 are vertically symmetrical in itself, and as a result of the pair of input feed line structures 110 being horizontally symmetrical to the pair of output feed line structures 120, the pair of input feed line structures 110 are also vertically symmetrical in itself.
Specifically, in some embodiments, the pair of input feed line structures 110 includes a first input feed line structure 111 and a second input feed line structure 112 that are symmetrically disposed, and the pair of output feed line structures 120 includes a first output feed line structure 121 and a second output feed line structure 122 that are symmetrically disposed. In the present embodiment, the symmetrical arrangement of the first and second input feeder structures 111 and 112 and the first and second output feeder structures 121 and 122 is a horizontally lower upper symmetrical arrangement, but the present application is not limited thereto, and may be arranged according to actual circuit design considerations.
Each of the first input feed line structure 111, the second input feed line structure 112, the first output feed line structure 121, and the second output feed line structure 122 includes a feed portion p1, a first coupling portion p2, and a second coupling portion p3, wherein the first coupling portion p2 and the second coupling portion p3 are connected with one end of the feed portion p1, respectively, and the other end of the feed portion p1 serves as an input port/output port, and the first coupling portion p2 and the second coupling portion p3 serve to achieve slot coupling. The other ends of the feeding portions p1 of the first and second input feeder structures 111 and 112 are fed with electromagnetic signals as input ports, and the other ends of the feeding portions p1 of the first and second output feeder structures 121 and 122 are fed with electromagnetic signals as output ports. Note that the arrangement of the input port and the output port is merely illustrative, and the input port and the output port may be reversed.
The first coupling portion p2 and the second coupling portion p3 are used to realize slot coupling, so that the degree of freedom of external coupling is increased, and the design flexibility of the balance filter 100 is improved.
The equivalent impedance of the first coupling portion p2 and the second coupling portion p3 are the same, and are different from the equivalent impedance of the feeding portion p 1. Further, the equivalent impedance of the feeding portion p1 is 50 ohms, and the equivalent impedance of the first coupling portion p2 and the second coupling portion p3 is less than 50 ohms.
Further, in some embodiments, the balanced filter 100 includes a pair of input feed structures 110 and a pair of output feed structures 120 that are symmetrically disposed, a first patch resonator 130 and a second patch resonator 140 that are symmetrically disposed, and a first microstrip line resonator 150 and a second microstrip line resonator 160 that are symmetrically disposed. That is, the balance filter 100 is fabricated using a dielectric substrate having a dielectric constant of 3.35 and a thickness of 0.8mm. Of course, in other embodiments, dielectric substrates of other parameters may be used to fabricate the bandpass filter within the purview of those skilled in the art, and are not limited herein.
As shown in fig. 2 and 3, fig. 2 is a scattering parameter graph of a balance filter according to an embodiment of the present application, and fig. 3 is a partially enlarged scattering parameter graph of the balance filter according to an embodiment of the present application. For the balanced filter 100 of the above embodiment, when the dielectric substrate is used for manufacturing, the center frequencies of the two pass bands are 3.5GHz and 4.9GHz, the minimum insertion loss in the two pass bands is 0.63dB and 1.37dB, the return loss is greater than 20dB, and the common mode noise suppression is better than 20dB in 0-8 GHz.
Those skilled in the art will readily appreciate that many modifications and variations are possible in the device and method while maintaining the teachings of the present application. Accordingly, the above disclosure should be viewed as limited only by the scope of the appended claims.
Claims (10)
1. A balanced filter, comprising:
a pair of input feeder structures and a pair of output feeder structures which are symmetrically arranged, a first patch resonator and a second patch resonator which are symmetrically arranged, and a first microstrip line resonator and a second microstrip line resonator which are symmetrically arranged;
wherein the pair of input feed line structures and the pair of output feed line structures are symmetrically disposed about a first direction and the pair of input feed line structures are coupled with the first patch resonator and the second patch resonator slots, the pair of output feed line structures being coupled with the first patch resonator and the second patch resonator slots to provide electromagnetic excitation;
the first patch resonator and the second patch resonator are symmetrically arranged about a second direction and are in gap coupling so as to generate a first passband under the action of electromagnetic excitation, wherein the second direction is perpendicular to the first direction;
the first microstrip line resonator and the second microstrip line resonator are symmetrically arranged about the second direction and are in gap coupling so as to generate a second passband under the action of electromagnetic excitation;
the first patch resonator and the second patch resonator are patches symmetrically arranged relative to the first direction, and grooves are formed in the patches at symmetrical positions of the patches on one side of gap coupling between the first patch resonator and the second patch resonator and used for adjusting the first passband so as to be used for common mode frequency suppression of the first passband and the second passband;
the first microstrip line resonator is accommodated in the groove of the first patch resonator, and the second microstrip line resonator is accommodated in the groove of the second patch resonator.
2. The balanced filter according to claim 1, wherein the first microstrip resonator and the second microstrip resonator are microstrip lines symmetrically arranged with respect to the first direction.
3. The balanced filter according to claim 1 or 2, wherein the first microstrip resonator is subjected to a bending process in a slot of the first patch resonator, and the second microstrip resonator is subjected to a bending process in a slot of the second patch resonator.
4. A balanced filter according to claim 3, wherein the microstrip line includes first and second bending structures symmetrically arranged about the first direction and a connection portion connecting the first and second bending structures.
5. The balanced filter of claim 4, wherein the first and second bend structures each include a first portion, a second portion, and a third portion connected between the first and second portions, wherein the first and second portions are disposed in parallel and in correspondence, and the third portion is perpendicular to the first and second portions.
6. The balanced filter of claim 5, wherein a length of the third section is equal to a length of the connection section; the third section is configured to implement gap coupling between the first microstrip resonator and the second microstrip resonator.
7. The balanced filter of claim 5, wherein a length of the first portion is greater than a length of the second portion.
8. The balanced filter of claim 1, wherein the patch has a rectangular shape and the slot has a rectangular shape, the slot having a length that is parallel to a width of the patch.
9. The balance filter of claim 1,
the gap between the first patch resonator and the second patch resonator is a first gap for gap coupling between the first patch resonator and the second patch resonator;
the gap between the first microstrip line resonator and the second microstrip line resonator is a second gap, so as to be used for gap coupling between the first microstrip line resonator and the second microstrip line resonator;
wherein the first gap is larger than the second gap.
10. A balance filter according to any one of claims 1 to 9,
the pair of input feeder structures comprises a first input feeder structure and a second input feeder structure which are symmetrically arranged, and the pair of output feeder structures comprises a first output feeder structure and a second output feeder structure which are symmetrically arranged;
wherein each of the first input feeder structure, the second input feeder structure, the first output feeder structure, and the second output feeder structure includes a feeding portion, a first coupling portion, and a second coupling portion, wherein the first coupling portion and the second coupling portion are respectively connected with one end of the feeding portion, the other end of the feeding portion serves as an input/output port, and the first coupling portion and the second coupling portion are used for realizing slot coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210837023.2A CN115149229B (en) | 2022-07-15 | 2022-07-15 | Balanced filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210837023.2A CN115149229B (en) | 2022-07-15 | 2022-07-15 | Balanced filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115149229A CN115149229A (en) | 2022-10-04 |
| CN115149229B true CN115149229B (en) | 2024-02-20 |
Family
ID=83412320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210837023.2A Active CN115149229B (en) | 2022-07-15 | 2022-07-15 | Balanced filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115149229B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108365309A (en) * | 2018-02-05 | 2018-08-03 | 南京信息工程大学 | A kind of balance double-passband filter based on open circuit minor matters load coupling line feed |
| CN113131108A (en) * | 2021-03-22 | 2021-07-16 | 华东交通大学 | Balance filter |
| WO2021164198A1 (en) * | 2020-02-19 | 2021-08-26 | 中天通信技术有限公司 | Microstrip low-pass filter |
| CN114725635A (en) * | 2022-05-06 | 2022-07-08 | 华东交通大学 | Double-frequency balance filter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI540787B (en) * | 2014-12-09 | 2016-07-01 | 啟碁科技股份有限公司 | Balun filter and radio-frequency system |
-
2022
- 2022-07-15 CN CN202210837023.2A patent/CN115149229B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108365309A (en) * | 2018-02-05 | 2018-08-03 | 南京信息工程大学 | A kind of balance double-passband filter based on open circuit minor matters load coupling line feed |
| WO2021164198A1 (en) * | 2020-02-19 | 2021-08-26 | 中天通信技术有限公司 | Microstrip low-pass filter |
| CN113131108A (en) * | 2021-03-22 | 2021-07-16 | 华东交通大学 | Balance filter |
| CN114725635A (en) * | 2022-05-06 | 2022-07-08 | 华东交通大学 | Double-frequency balance filter |
Non-Patent Citations (3)
| Title |
|---|
| Haiwen Liu ; Zhengbiao Wang ; Shuangxi Hu ; He-Xiu Xu ; Baoping Ren. Design of Tri-Band Balanced Filter With Wideband Common-Mode Suppression and Upper Stopband Using Square Ring Loaded Resonator.《IEEE Transactions on Circuits and Systems II: Express Briefs》.2019,全文. * |
| 刘欣磊 ; 任宝平 ; 官雪辉 ; 赵波 ; 徐梦柔 ; 黄雪宇.基于分支线结构的双宽频带平衡带通滤波器.《2021年全国微波毫米波会议论文集（下册）》.2021,全文. * |
| 吕大龙 ; 刘庆 ; 张俊杰 ; 张德伟 ; 周东方.小型化多层双模基片集成波导平衡带通滤波器.《强激光与粒子束》.2020,全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115149229A (en) | 2022-10-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4904197B2 (en) | Unbalanced feed broadband slot antenna | |
| JP4904196B2 (en) | Unbalanced feed broadband slot antenna | |
| JP4287902B2 (en) | Broadband slot antenna | |
| KR100390851B1 (en) | Surface-mounted type antenna, method for adjusting and setting dual-resonance frequency thereof, and communication device including the surface-mounted type antenna | |
| CN114725635B (en) | Dual-frequency balance filter | |
| CN114937868B (en) | Millimeter wave substrate integrated dielectric filter antenna with integrated waveguide feed | |
| CN113991269B (en) | Miniaturized high-harmonic-suppression dual-passband filter based on dielectric integrated suspension line | |
| CN115149229B (en) | Balanced filter | |
| CN113131108B (en) | Balance filter | |
| CN214849052U (en) | Antenna feed structure, antenna and gateway equipment | |
| CN212751125U (en) | Antenna and electronic equipment | |
| CN116722342B (en) | Millimeter wave filtering super-surface antenna module and communication equipment | |
| CN211150738U (en) | Dual-passband adjustable microstrip filter | |
| CN115995662B (en) | Phase shifter | |
| CN214505770U (en) | Broadband external antenna | |
| CN118174674B (en) | Filter chip and electronic device | |
| CN219575905U (en) | Ultra-wideband microstrip filter based on stepped impedance resonator | |
| CN113270728B (en) | Tunable decoupling network for multi-antenna system | |
| CN117293502A (en) | Double-frequency balance filter based on composite left and right hands | |
| US20240275073A1 (en) | Antenna module | |
| WO2024152909A1 (en) | Low-frequency antenna unit, high-frequency antenna unit, antenna array, and terminal device | |
| CN115458882A (en) | Compact balanced type broadband phase shifter | |
| CN115802583A (en) | Double-frequency conversion circuit structure | |
| CN115764212A (en) | Miniaturized microstrip three-frequency filter based on zero-degree feed structure | |
| CN117832796A (en) | Circulator and power amplifier equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |