CN115149229A - Balance filter - Google Patents
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- CN115149229A CN115149229A CN202210837023.2A CN202210837023A CN115149229A CN 115149229 A CN115149229 A CN 115149229A CN 202210837023 A CN202210837023 A CN 202210837023A CN 115149229 A CN115149229 A CN 115149229A
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Abstract
The application provides a balanced filter, which comprises a pair of symmetrically arranged input feeder line structures and a pair of symmetrically arranged output feeder line structures, 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 pass band under the action of electromagnetic excitation; the first microstrip line resonator and the second microstrip line resonator generate a second passband under the action of electromagnetic excitation; the first patch resonator and the second patch resonator are both patches, and the patches are provided with grooves for adjusting a first passband so as to be used for common-mode frequency suppression of the first passband and a second passband; the first microstrip line resonator and the second microstrip line resonator are accommodated in the slot. The utility model provides a simple structure when balanced filter realizes the dual-band to every frequency band is regulated and control in a flexible way, and reinforcing design flexibility ratio improves common mode noise's suppression degree, and is miniaturized.
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 demand for multi-mode, multi-standard and multi-service communication is more and more strong. However, the large-scale arrangement and high system integration of the communication network, the electromagnetic interference at the radio frequency front end and the signal crosstalk between the modules thereof greatly affect the communication performance, wherein the common mode interference signal causes the radiation power loss in the millimeter wave frequency spectrum (26-40 GHz) even up to 25% of the input power, which greatly reduces the communication quality. Researches show 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 demand for multifunctional systems in modern wireless communication (such as 5G systems) and simultaneously deal with complicated and variable electromagnetic noise interference environments, it is of great significance to research and design a balance filter with excellent anti-noise performance.
However, the number of frequency bands of the balance filter cannot meet the current requirement of multi-service communication, especially under the current situation of coexistence of multi-system communication systems in the 5G communication era.
Disclosure of Invention
According to an embodiment of the present application, a balanced filter is proposed to solve the above-mentioned problems.
According to an aspect of the present application, an example balanced filter is disclosed. The exemplary balanced filter comprises a pair of symmetrically arranged input feeder structures and a pair of output feeder structures, 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 slot coupled with the first patch resonator and the second patch resonator, and the pair of output feed line structures are slot coupled with the first patch resonator and the second patch resonator to provide electromagnetic excitation; the first patch resonator and the second patch resonator are symmetrically arranged about a second direction and are in slot coupling so as to generate a first pass band 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 in the second direction and are in slot coupling, so that a second pass band is generated under the action of electromagnetic excitation; the first patch resonator and the second patch resonator are both symmetrically arranged relative to the first direction, and the patches are provided with grooves from one side of the slot coupling between the first patch resonator and the second patch resonator and at the symmetrical positions of the patches so as to be used for adjusting the first passband and further 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 line resonator and the second microstrip line resonator are both microstrip lines symmetrically arranged with respect to the first direction.
In some embodiments, 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.
In some embodiments, the microstrip line includes a first bent structure and a second bent structure symmetrically disposed about the first direction, and a connection portion connecting the first bent structure and the second bent structure.
In some embodiments, each of the first bending structure and the second bending structure includes 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 disposed correspondingly, 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 realize a gap coupling between the first microstrip line resonator and the second microstrip line 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 direction parallel to a width direction of the patch.
In some embodiments, a slot between the first and second patch resonators is a first slot for slot coupling between the first and second patch resonators; a gap between the first microstrip line resonator and the second microstrip line resonator is a second gap 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 that are symmetrically arranged, and the pair of output feed line structures comprises a first output feed line structure and a second output feed line structure that are symmetrically arranged;
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 to 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 implementing slot coupling.
The beneficial effect of this application has: the first patch resonator and the second patch resonator are symmetrically arranged and in gap coupling with respect to the second direction to generate a first pass band under the action of electromagnetic excitation, the first microstrip line resonator and the second microstrip line resonator are symmetrically arranged and in gap coupling with respect to the second direction to generate a second pass band under the action of electromagnetic excitation, and therefore the dual-band balanced filter with a simple structure is realized, each frequency band can be flexibly regulated and controlled, the design flexibility is enhanced, the first patch resonator and the second patch resonator are both patches symmetrically arranged with respect to the first direction, the patches are provided with grooves at symmetrical positions of the patches from one side of the gap coupling between the first patch resonator and the second patch resonator to suppress the common mode frequency of the first pass band and the second pass band, the suppression degree of common mode noise is improved, and the dual-band balanced filter with good performance is realized.
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 structural diagram of a balanced filter according to an embodiment of the present application.
Fig. 2 is a scattering parameter graph of a balance filter according to an embodiment of the present application.
Fig. 3 is a partially enlarged scattering parameter plot of a balanced 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 one skilled in the art can appreciate, electronic device manufacturers may refer to a component by different names. This document does not intend to distinguish between components that differ in name but not function. In the following specification and claims, the word "comprising" is an open ended term of art, and thus should be interpreted to mean "including, but not limited to, \8230;". Additionally, 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 made through the other device and connection 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 feeder structures 110 and a pair of output feeder structures 120 which are symmetrically disposed, first and second patch resonators 130 and 140 which are symmetrically disposed, and first and second microstrip line resonators 150 and 160 which are symmetrically disposed.
Wherein the pair of input feeder structures 110 and the pair of output feeder structures 120 are symmetrically disposed about the first direction, and the pair of input feeder structures 110 are slot-coupled with the first patch resonator 130 and the second patch resonator 140, and the pair of output feeder structures 120 are slot-coupled with the first patch resonator 130 and the second patch resonator 140 to provide electromagnetic excitation.
The first and second patch resonators 130 and 140 are symmetrically arranged about a second direction perpendicular to the first direction and slot-coupled to produce a first pass band under electromagnetic excitation.
The first microstrip-line resonator 150 and the second microstrip-line resonator 160 are symmetrically disposed about the second direction and are slot-coupled to generate a second passband under electromagnetic excitation.
The symmetrical arrangement of the pair of input feeder structures 110 and the pair of output feeder 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 actual 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, and the first and second patch resonators 130 and 140 and the first and second microstrip-line resonators 150 and 160 are symmetrically disposed about a second direction, which 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 feeder structures 110 and the pair of output feeder structures 120 may be symmetrically disposed about a tilted line, i.e., the first direction is a tilted line direction, e.g., a 45 ° tilted line, and the first microstrip line resonator 150 and the second microstrip line resonator 160 are symmetrically disposed about another tilted line, i.e., the second direction is another tilted line found, e.g., a 135 ° tilted line.
The first patch resonator 130 and the second patch resonator 140 generate a first pass band under electromagnetic excitation, and the first microstrip-line resonator 150 and the second microstrip-line resonator 160 generate a second pass band under electromagnetic excitation, wherein the center frequency of the first pass band is lower than that of the second pass band, that is, the second pass band is located in a high-frequency portion of the first pass band. It can be seen that the structure of the balanced 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 both patches t symmetrically arranged relative to the first direction, and a slot c is formed in the patches t from the side of the slot coupling between the first patch resonator 130 and the second patch resonator 140 and at the symmetrical positions of the patches t to adjust a first pass band, so that the first pass band and the second pass band are used for common-mode frequency suppression;
the first microstrip line resonator 150 is accommodated in the groove c of the first patch resonator 130, and the second microstrip line resonator 160 is accommodated in the groove c of the second patch resonator 140.
The first and second patch resonators 130 and 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 a center frequency of the first pass band. The patch t is formed with a slot c at a symmetrical position of the patch t from one side of the slot coupling between the first patch resonator 130 and the second patch resonator 140, that is, the patch t is recessed toward the other side of the slot coupling between the first patch resonator 130 and the second patch resonator 140 at the symmetrical position of the patch t, forming a slot c.
For example, the first patch resonator 130 is recessed toward the left side from the side where it is coupled with the slot between the second patch resonator 140, i.e., the right side, and at the symmetrical position of the first patch resonator 130, to form the slot c, and the second patch resonator 140 is recessed toward the right side from the side where it is coupled with the slot between the first patch resonator 130, i.e., the left side, and at the symmetrical position of the second patch resonator 140, to form the slot c.
The formed slot 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 rejection of the first passband and the second passband is realized.
The first microstrip resonator 150 and the second microstrip resonator 160 are each a half-wavelength resonator. The first microstrip line resonator 150 is accommodated in the groove c of the first patch resonator 130, that is, the first microstrip line resonator 150 is embedded in the groove c of the first patch resonator 130, and the second microstrip line resonator 160 is accommodated in the groove c of the second patch resonator 140, that is, the second microstrip line resonator 160 is embedded in the groove c of the second patch resonator 140. The first microstrip line resonator 150 and the second microstrip line resonator 160 can be subjected to various bending treatments in the groove c, so that the spatial layout is reasonably utilized, the miniaturization is realized, and the manufacturing cost is reduced.
In this embodiment, the first patch resonator 130 and the second patch resonator 140 are symmetrically arranged and slot-coupled with respect to the second direction to generate a first pass band under the action of electromagnetic excitation, the first microstrip line resonator 150 and the second microstrip line resonator 160 are symmetrically arranged and slot-coupled with respect to the second direction to generate a second pass band under the action of electromagnetic excitation, so as to implement the dual-band balanced filter 100 with a simple structure, and flexibly regulate and control each frequency band, thereby enhancing design flexibility, and the first patch resonator 130 and the second patch resonator 140 are both patch t symmetrically arranged with respect to the first direction, the patch t is provided with a slot c at a symmetrical position of the patch t from one side of the slot coupling between the first patch resonator 130 and the second patch resonator 140, so as to be used for common mode frequency suppression of the first pass band and the second patch resonator, thereby improving the suppression degree of common mode noise, implementing the dual-band balanced filter 100 with good performance, and in addition, the first patch resonator 150 is accommodated in the slot c of the first patch resonator 130, and the second microstrip line resonator 160 c is accommodated in the slot of the second patch resonator 140, thereby implementing miniaturization and reducing the manufacturing cost.
As described above, the first microstrip line resonator 150 and the second microstrip line resonator 160 are both half-wavelength resonators. In some embodiments, the first microstrip line resonator 150 and the second microstrip line resonator 160 are both microstrip lines w symmetrically arranged 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 line resonator 150 is accommodated in the groove c of the first patch resonator 130, and the second microstrip line resonator 160 is accommodated in the groove c of the second patch resonator 140. In some embodiments, the first microstrip resonator 150 is subjected to a bending process in the groove c of the first patch resonator 130, and the second microstrip resonator 160 is subjected to a bending process in the groove c of the second patch resonator 140.
The first microstrip line resonator 150 is bent in the groove c of the first patch resonator 130, and the second microstrip line resonator 160 is bent in the groove c of the second patch resonator 140, that is, the microstrip lines w of the first microstrip line resonator 150 and the second microstrip line resonator 160 are both bent in the groove c of the patch t, so that the spatial layout is reasonably utilized, the miniaturization is realized, and the manufacturing cost is reduced. In addition, after the microstrip lines w of the first microstrip line resonator 150 and the second microstrip line resonator 160 are bent, the energy inside the microstrip lines w are mutually cancelled out, so that 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.
First structure w1 and the second structure w2 of buckling all can be the U type structure of buckling, and the microstrip line w goes up the part that first structure w1 and the second structure w2 of buckling and buckle 2 times through buckling promptly, and connecting portion w3 is connected first structure w1 and the second structure w2 of buckling, and connecting portion w3 is connected between the one end of first structure w1 of buckling and the one end of second structure w2 of buckling promptly.
Note that once bending of a portion on the microstrip line w means that 90 degrees of bending is performed once for the portion.
As described above, the first bending structure w1 and the second bending structure w2 may both be U-shaped bending structures, that is, the portions corresponding to the first bending structure w1 and the second bending structure w2 are bent for 2 times, in some embodiments, the first bending structure w1 and the second bending structure w2 both include the first portion x1, the second portion x2, and the third portion x3 connected between the first portion x1 and the second portion x2, wherein the first portion x1 and the second portion x2 are parallel and disposed correspondingly, 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 arranged in parallel and correspondingly, and 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 thereof (i.e., one end of the first portion x 1) towards the first direction, reach the other end of the first portion x1, are bent for 1 time, reach the third portion x3, are bent for 1 time, reach one end of the second portion x2, and extend to the other end of the second portion x2 towards the reverse direction of the first direction.
The lengths of the first portion x1, the second portion x2, and the third portion x3 are determined according to the size of the groove c formed in the patch t. The lengths 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 section x3 is used to realize the slot coupling between the first microstrip-line resonator 150 and the second microstrip-line resonator 160.
The length of the third part x3 is equal to that of the connecting part w3, so that mutual energy offset of the microstrip line resonator is better realized.
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 and second patch resonators 130 and 140 are both patches t. In some embodiments, the patch t is rectangular in shape, the slot c is rectangular in shape, and the length direction of the slot c is parallel to the width direction of the patch t.
The length direction of the groove c is parallel to the width direction of the patch t, i.e., the length direction of the groove c is perpendicular to the length direction of the patch t.
In an example in which the patch t has a rectangular shape, a pair of input feed line structures 110 are coupled with the width-directional slots of the first and second patch resonators 130 and 140, and a pair of output feed line structures 120 are coupled with the width-directional slots of the first and second patch resonators 130 and 140.
As described above, the first patch resonator 130 and the second patch resonator 140 are slot-coupled, and the first microstrip line resonator 150 and the second microstrip line resonator 160 are slot-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, which is used 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 described above, the pair of input feeder structures 110 and the pair of output feeder structures 120 are symmetrically disposed about the first direction, e.g., horizontally symmetrically disposed, in which case, in some embodiments, the pair of input feeder structures 110 are also symmetrically disposed themselves, and the pair of output feeder structures 120 are also symmetrically disposed themselves. For example, the pair of input feeder structures 110 are vertically symmetrical, and similarly, since the pair of input feeder structures 110 and the pair of output feeder structures 120 are horizontally symmetrical, the pair of input feeder structures 110 are also vertically symmetrical.
In particular, 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 arranged symmetrically from top to bottom in the horizontal direction, but the present application is not limited thereto, and it may be arranged according to actual circuit design considerations.
Each of the first input feeder structure 111, the second input feeder structure 112, the first output feeder structure 121, and the second output feeder structure 122 includes a feeding portion p1, a first coupling portion p2, and a second coupling portion p3, where the first coupling portion p2 and the second coupling portion p3 are respectively connected to one end of the feeding portion p1, the other end of the feeding portion p1 serves as an input port/an output port, and the first coupling portion p2 and the second coupling portion p3 are used for implementing slot coupling. The other ends of the feeding portions p1 of the first and second input feeder structures 111 and 112 are used as input ports to which electromagnetic signals are fed, and the other ends of the feeding portions p1 of the first and second output feeder structures 121 and 122 are used as output ports from which electromagnetic signals are fed. 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 part p2 and the second coupling part p3 are used for realizing gap coupling, so that the degree of freedom of external coupling is increased, and the design flexibility of the balanced filter 100 is improved.
The first coupling section p2 and the second coupling section p3 have the same equivalent impedance and are different from the equivalent impedance of the feeding section 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 feeder structures 110 and a pair of output feeder structures 120 that are symmetrically disposed, first and second patch resonators 130 and 140 that are symmetrically disposed, and first and second microstrip line resonators 150 and 160 that are symmetrically disposed. That is, the balance filter 100 was fabricated using a dielectric substrate having a dielectric constant of 3.35 and a thickness of 0.8mm. Of course, in other embodiments, the bandpass filter can be made by using dielectric substrates with other parameters within the understanding range of those skilled in the art, and the disclosure is not limited thereto.
As shown in fig. 2 and 3, fig. 2 is a scattering parameter graph of the balance filter according to the embodiment of the present application, and fig. 3 is a partially enlarged scattering parameter graph of the balance filter according to the embodiment of the present application. In the case of the balanced filter 100 of the embodiment, when the dielectric substrate is used for manufacturing, the center frequencies of the two pass bands are respectively 3.5GHz and 4.9GHz, the minimum insertion losses in the two pass bands are respectively 0.63dB and 1.37dB, the return loss is greater than 20dB, and the common mode noise suppression is better than 20dB in 0 to 8 GHz.
It will be apparent to those skilled in the art that many modifications and variations can be made in the devices and methods while maintaining the teachings of the present application. Accordingly, the above disclosure should be considered limited only by the scope of the following claims.
Claims (10)
1. A balanced filter, comprising:
the antenna comprises a pair of symmetrically arranged input feeder structures, a pair of symmetrically arranged output feeder structures, a first patch resonator, a second patch resonator, a first microstrip line resonator and a second microstrip line resonator, wherein the first patch resonator and the second patch resonator 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 slot coupled with the first patch resonator and the second patch resonator, and the pair of output feed line structures are slot coupled with the first patch resonator and the second patch resonator to provide electromagnetic excitation;
the first patch resonator and the second patch resonator are symmetrically arranged around 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 relative to the second direction and are in slot coupling so as to generate a second passband under the action of electromagnetic excitation;
the first patch resonator and the second patch resonator are both symmetrically arranged relative to the first direction, and the patches are provided with grooves from one side of the slot coupling between the first patch resonator and the second patch resonator and at the symmetrical positions of the patches so as to be used for adjusting the first passband and further 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 line resonator and the second microstrip line resonator are both microstrip lines disposed symmetrically with respect to the first direction.
3. The balanced filter according to claim 1 or 2, characterized in that the first microstrip resonator is subjected to bending processing in the slot of the first patch resonator, and the second microstrip resonator is subjected to bending processing in the slot of the second patch resonator.
4. The balance filter according to claim 3, wherein the microstrip line includes a first meander structure and a second meander structure symmetrically arranged with respect to the first direction, and a connection portion connecting the first meander structure and the second meander structure.
5. The balanced filter according to claim 4, wherein the first meander structure and the second meander 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 corresponding to each other, and wherein the third portion is perpendicular to the first portion and the second portion.
6. The balance filter of claim 5, wherein the length of the third portion is equal to the length of the connecting portion; the third part is used for realizing the gap coupling between the first microstrip line resonator and the second microstrip line resonator.
7. The balance filter of claim 5, wherein the length of the first section is greater than the length of the second section.
8. The balanced filter according to claim 1, characterized in that the patches are rectangular in shape and the slots are rectangular in shape, the length direction of the slots being parallel to the width direction of the patches.
9. The balance filter of claim 1,
a 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;
a gap between the first microstrip line resonator and the second microstrip line resonator is a second gap 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. The balance filter of any 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;
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 to 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 implementing slot coupling.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160164160A1 (en) * | 2014-12-09 | 2016-06-09 | Wistron Neweb Corporation | Balun Filter and Radio-Frequency System |
| 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 |
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2022
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160164160A1 (en) * | 2014-12-09 | 2016-06-09 | Wistron Neweb Corporation | Balun Filter and Radio-Frequency System |
| 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》, 28 October 2019 (2019-10-28) * |
| 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）》, 31 May 2021 (2021-05-31) * |
| 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》, 31 March 2020 (2020-03-31) * |
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| Publication number | Publication date |
|---|---|
| CN115149229B (en) | 2024-02-20 |
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