CN109888442B - Four-mode dielectric band-pass filter - Google Patents
Four-mode dielectric band-pass filter Download PDFInfo
- Publication number
- CN109888442B CN109888442B CN201910038308.8A CN201910038308A CN109888442B CN 109888442 B CN109888442 B CN 109888442B CN 201910038308 A CN201910038308 A CN 201910038308A CN 109888442 B CN109888442 B CN 109888442B
- Authority
- CN
- China
- Prior art keywords
- microstrip line
- substrate
- microstrip
- line
- dielectric
- 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
- 229910052751 metal Inorganic materials 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 61
- 239000000758 substrate Substances 0.000 claims abstract description 47
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052802 copper Inorganic materials 0.000 claims description 19
- 239000010949 copper Substances 0.000 claims description 19
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 10
- 229910052709 silver Inorganic materials 0.000 claims description 10
- 239000004332 silver Substances 0.000 claims description 10
- 239000004809 Teflon Substances 0.000 claims description 5
- 229920006362 Teflon® Polymers 0.000 claims description 5
- 239000003989 dielectric material Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000005284 excitation Effects 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a four-mode dielectric band-pass filter, which takes a single dielectric unit as a dielectric resonator, and is matched with an upper substrate to stably load the dielectric resonator in a metal cavity, so as to form mixed resonance; meanwhile, the four microstrip lines and the two strip lines are used for generating mixed feed to excite the mixed resonance to form a pass band of the filter, and because the load effects of the microstrip lines and the strip lines are different, a large frequency deviation cannot be generated under excitation, so that the band-pass filter with the four-mode characteristic can be realized; meanwhile, a first SMA connector and a second SMA connector are also arranged, so that signals can be transmitted and received in time, and the corresponding microstrip lines can be excited. Therefore, the invention has simple structure and reasonable design, and the filter with four-mode characteristics is obtained by adopting a microstrip feeding mode based on the loading of the metal cavity by the single dielectric resonator, and meanwhile, the filter also has the advantages of high quality factor, good stability and the like.
Description
Technical Field
The invention relates to the field of communication, in particular to a four-mode dielectric band-pass filter.
Background
Microwave filters play an irreplaceable important role in wireless communication systems, the performance of the microwave filters often has a direct influence on the performance of the whole wireless communication system, single-mode band-pass filters are usually formed by basic dielectric resonators, but only limited working bandwidth and unsatisfactory frequency selectivity can be provided, and accordingly, a solution for coupling a plurality of resonators is provided, but the solution has the disadvantages of larger overall size and complicated design process, and the achievable maximum modulus is 3, so that the working bandwidth of the microwave filters is limited.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a four-mode dielectric bandpass filter, which is based on a single dielectric resonator loaded with a metal cavity and adopts a microstrip feeding manner to make the filter have four-mode characteristics.
In order to make up for the defects of the prior art, the embodiment of the invention adopts the following technical scheme:
a four-mode dielectric band-pass filter comprises a substrate, a metal cover plate, a metal cavity, a dielectric unit, a first SMA connector and a second SMA connector, wherein the first SMA connector and the second SMA connector are used for signal input or signal output; the metal cavity is provided with a metal cover plate, a metal cavity body, a dielectric unit, a substrate, a first SMA connector, a second SMA connector, a first microstrip line and a second microstrip line, wherein the dielectric unit and the substrate are both arranged in the metal cavity body, the metal cover plate is arranged on the top of the metal cavity body, the dielectric unit is arranged on the substrate, the substrate is in seamless fit with one surface of the metal cavity body, the first SMA connector and the second SMA connector are both arranged on the metal cavity body, the first microstrip line is connected to the first SMA connector.
Further, the dielectric unit and the substrate are integrally connected.
Further, the first strip line and the second strip line are both silver strip lines.
Further, the first microstrip line and the second microstrip line are both copper microstrip lines.
Further, the third microstrip line and the fourth microstrip line are both silver microstrip lines.
Further, the bottom layer of the substrate is covered with a copper layer.
Further, the copper microstrip line is a copper 50-ohm impedance matching microstrip line.
Further, the dielectric unit is made of ceramic dielectric materials.
Further, the substrate is a teflon substrate.
Further, the metal cover plate is installed on the top of the metal cavity through screws or in a buckling mode.
One or more technical schemes provided in the embodiment of the invention have at least the following beneficial effects: a single dielectric unit is used as a single dielectric resonator, and is matched with the upper substrate to be stably loaded in the metal cavity, so that mixed resonance is formed; meanwhile, the four microstrip lines and the two strip lines are used for generating mixed feed to excite the mixed resonance to form a pass band of the filter, and because the load effects of the microstrip lines and the strip lines are different, a large frequency deviation cannot be generated under excitation, so that the band-pass filter with the four-mode characteristic can be realized; meanwhile, a first SMA connector and a second SMA connector which are respectively matched and connected with the first microstrip line and the second microstrip line are also arranged, so that signals can be transmitted and received in time, and the corresponding microstrip lines can be excited. Therefore, the invention has simple structure, reasonable design and easy integration, and the filter with four-mode characteristics is obtained by adopting a microstrip feed mode based on the loading of the single dielectric resonator into the metal cavity, and simultaneously has the advantages of high quality factor, good stability and the like.
Drawings
The following description of the preferred embodiments of the present invention will be made in conjunction with the accompanying drawings.
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a schematic side view of an embodiment of the present invention;
FIG. 3 is a schematic top view of an embodiment of the present invention;
FIG. 4 is a diagram illustrating simulation and test results according to an embodiment of the present invention;
Detailed Description
The microwave filter plays an irreplaceable important role in the wireless communication system, and the performance of the microwave filter has a direct influence on the performance of the whole wireless communication system. Emerging wireless communication technologies put more stringent requirements on wireless systems, and not only are small insertion loss, large filter bandwidth, high out-of-band rejection and large power capacity required for microwave filters, but also filters with smaller size, lighter weight and lower cost are desired in order to realize integration of microwave filters in wireless communication systems and miniaturization of the whole wireless systems; accordingly, dielectric resonators with high dielectric constant and multimode filters designed by multimode technology are widely used in the field of wireless communications, for example, a single-mode bandpass filter is generally formed by basic dielectric resonators, but only provide a limited operating bandwidth and unsatisfactory frequency selectivity, and, accordingly, solutions have emerged for coupling multiple resonators, over the last few years, much research has been carried out in the field of designing multimode filters from a single resonator, in the existing research results, a filter with dual-mode characteristics can be realized by methods of screw tuning, corner cutting and the like, and a few documents propose a method for realizing a filter with three-mode characteristics, however, this method has the disadvantage of large overall size and complicated design process, and the maximum achievable modulus is 3, resulting in limited operating bandwidth of the microwave filter.
Based on this, referring to fig. 1 to 4, an embodiment of the present invention provides a four-mode dielectric bandpass filter, including a substrate 4, a metal cover plate 1, a metal cavity 2, a dielectric element 3, and a first SMA connector 11 and a second SMA connector 12 for signal input or output, where a first microstrip line 5 and a second microstrip line 9 are disposed on a top layer of the substrate 4, a first strip line 6 and a second strip line 8 are disposed on a side surface of the dielectric element 3, a third microstrip line 7 and a fourth microstrip line 10 are disposed on a bottom surface of the dielectric element 3, one end of each of the first microstrip line 5 and the third microstrip line 7 is connected to one end of the first strip line 6, and one end of each of the second microstrip line 9 and the fourth microstrip line 10 is connected to one end of the second strip line 8; the metal cover plate is characterized in that the medium unit 3 and the substrate 4 are both installed in the metal cavity 2, the metal cover plate 1 is installed on the top of the metal cavity 2, the medium unit 3 is arranged on the substrate 4, the substrate 4 is in seamless fit with one surface of the metal cavity 2, the first SMA connector 11 and the second SMA connector 12 are both arranged on the metal cavity 2, the first microstrip line 5 is connected to the first SMA connector 11, and the second microstrip line 9 is connected to the second SMA connector 12.
In this embodiment, the dielectric unit 3 may be adhered to the substrate 4 by glue, and both the first SMA connector 11 and the second SMA connector 12 may be mounted on the side of the metal cavity 2 by screws; the first microstrip line 5 and the third microstrip line 7 are both connected with one end of the first strip line 6, and it can be known from the relative installation positions of the lines that the first strip line 6 is perpendicular to the first microstrip line 5 and the third microstrip line 7, so that the manufacture is convenient, the occupied space is small, and the connection of one ends of the first microstrip line, the second microstrip line 9, the fourth microstrip line 10 and the second strip line 8 is facilitated, the action effects are the same, and no redundancy is needed, in addition, the metal cover plate 1 is installed on the top of the metal cavity 2, so that partial communication interference can be eliminated, the communication stability is improved, and meanwhile, the outward radiation consumption of internal energy is reduced;
a single dielectric unit 3 is used as a single dielectric resonator and matched with the upper substrate 4 to be stably loaded in the metal cavity 2, so as to form hybrid resonance, namely, a basic mode TE of the dielectric resonator is selected1δ1Fundamental mode TM of die and metal cavity 2110The mode is taken as a mixed resonance working mode, then the dielectric resonator is loaded into the metal cavity 2 to interfere the internal electric field of the metal cavity 2, so that the metal cavity 2 is a fundamental mode TM110The resonant frequency of the mode shifts until reaching the fundamental mode TE of the dielectric resonator1δ1The resonant frequencies of the modes are close; then, the hybrid resonance is excited by generating hybrid feeding using the first microstrip line 5, the second microstrip line 9, the third microstrip line 7, and the fourth microstrip line 10 and the first strip line 6 and the second strip line 8, and a pass band of the filter is formed due to the microstrip lines and the strip linesThe loading effects of the four-mode filter are different, so that a large frequency deviation is not generated under the condition of exciting the same mode, and the band-pass filter with four-mode characteristics can be realized; the first SMA connector 11 and the second SMA connector 12 can transmit and receive signals in time, so that each microstrip line generates corresponding excitation, the substrate 4 is seamlessly attached to one surface of the metal cavity 2, the installation stability of the medium unit 3 can be improved, and the stability of an inner electric field is ensured. Therefore, the invention has simple structure, reasonable design and easy integration, and the filter with four-mode characteristics is obtained by adopting a microstrip feed mode based on the loading of the metal cavity 2 by the single dielectric resonator, and simultaneously has the advantages of high quality factor, good stability and the like. In addition, preferably, the first microstrip line 5 and the second microstrip line 9 have the same specification, the third microstrip line 7 and the fourth microstrip line 10 have the same specification, and the first strip line 6 and the second strip line 8 have the same specification, so that the design is convenient for matching and manufacturing, and the stability of the whole filter can be improved.
Further, another embodiment of the present invention provides a four-mode dielectric bandpass filter, wherein the dielectric element 3 and the substrate 4 are integrally connected, and in particular, the dielectric element 3 and the substrate 4 can be integrally fixed to the metal cavity 2 by screws. In this embodiment, the dielectric unit 3 and the substrate 4 can be more easily manufactured, which is beneficial to saving the manufacturing cost and improving the connection stability between the two.
Further, another embodiment of the present invention provides a four-mode dielectric bandpass filter, wherein the first strip line 6 and the second strip line 8 are both silver strip lines. In this embodiment, the silver strip line has advantages of a stable structure, excellent communication performance, and the like.
Further, another embodiment of the present invention provides a four-mode dielectric bandpass filter, wherein the first microstrip line 5 and the second microstrip line 9 are both copper microstrip lines. In the present embodiment, the microstrip line made of copper has advantages of stable transmission and reception signals, excellent physical properties, and the like.
Further, another embodiment of the present invention provides a four-mode dielectric bandpass filter, wherein the third microstrip line 7 and the fourth microstrip line 10 are both silver microstrip lines. In this embodiment, the silver microstrip line is adopted, which has the advantages of stable transmission and reception of signals, excellent physical properties, and the like.
Further, another embodiment of the present invention provides a four-mode dielectric bandpass filter, wherein the bottom layer of the substrate 4 is covered with a copper layer. In the present embodiment, the purpose of copper cladding is to improve the conductivity of the substrate 4, so that the substrate has good conductivity in the internal electric field.
Further, another embodiment of the present invention provides a four-mode dielectric band-pass filter, wherein the copper microstrip line is a copper 50-ohm impedance matching microstrip line; in the present embodiment, it is found from the experience of the inventor that the performance of the microstrip line under this impedance matching is better, and actually the impedance matching effect of different ohms is slightly different, but the overall performance is determined according to the specifications of the dielectric element 3, the substrate 4 and the metal cavity 2, which is well known to those skilled in the art and will not be described herein, and preferably, the length of the copper 50-ohm impedance matching microstrip line is 5.7mm, the width thereof is 1.8mm, the lengths of the third microstrip line 7 and the fourth microstrip line 10 are both 5mm and 0.2mm, and the lengths of the first strip line 6 and the second strip line 8 are both 8.3mm and the width thereof is 0.2 mm.
Further, another embodiment of the present invention provides a four-mode dielectric bandpass filter, wherein the dielectric unit 3 is made of a ceramic dielectric material; in this embodiment, the dielectric constant of the material is preferably 16, and the dielectric element 3 has a length of 34.2mm, a width of 20mm and a height of 8.3 mm.
Further, another embodiment of the present invention provides a four-mode dielectric bandpass filter, wherein the substrate 4 is a teflon substrate. In the present embodiment, teflon, i.e. polytetrafluoroethylene material, is a common material, and has better physical stability and expansibility, and preferably, the dielectric material is Rogers RT/Duroid 4003c material with a thickness of 0.813mm, a dielectric constant of 3.38, a length of 44.6mm, a width of 27.6mm, and a height of 0.813 mm.
Further, another embodiment of the present invention provides a four-mode dielectric bandpass filter, wherein the metal cover plate 1 is mounted on the top of the metal cavity 2 by screws or in a snap-fit manner, and both are made of metal aluminum, preferably, the length of the metal cover plate 1 is 52.6mm, the width is 35.6mm, and the height is 3mm, so that the specification of the metal cover plate 1 can be correspondingly matched to maintain the stable mounting between the two.
Referring to fig. 1 to 4, another embodiment of the present invention further provides a four-mode dielectric bandpass filter, including a substrate 4, a metal cover plate 1, a metal cavity 2, a dielectric element 3, and a first SMA connector 11 and a second SMA connector 12 for signal input or output, where a first microstrip line 5 and a second microstrip line 9 are disposed on a top layer of the substrate 4, a first strip line 6 and a second strip line 8 are disposed on a side surface of the dielectric element 3, a third microstrip line 7 and a fourth microstrip line 10 are disposed on a bottom surface of the dielectric element 3, one end of each of the first microstrip line 5 and the third microstrip line 7 is connected to one end of the first strip line 6, and one end of each of the second microstrip line 9 and the fourth microstrip line 10 is connected to one end of the second strip line 8; the dielectric unit 3 and the substrate 4 are both installed in the metal cavity 2, the dielectric unit 3 is arranged on the substrate 4, the substrate 4 is seamlessly attached to one surface of the metal cavity 2, the first SMA connector 11 and the second SMA connector 12 are both arranged on the metal cavity 2, the first microstrip line 5 is connected to the first SMA connector 11, and the second microstrip line 9 is connected to the second SMA connector 12; the dielectric unit 3 and the substrate 4 are integrally connected, the first strip line 6 and the second strip line 8 are silver strip lines, the first microstrip line 5 and the second microstrip line 9 are copper microstrip lines, the third microstrip line 7 and the fourth microstrip line 10 are silver microstrip lines, a copper layer is coated on the bottom layer of the substrate 4, the copper microstrip lines are copper 50-ohm impedance matching microstrip lines, the dielectric unit 3 is made of a ceramic dielectric material, the substrate 4 is a Teflon substrate, and the metal cover plate 1 is mounted on the top of the metal cavity 2 through screws or in a buckling mode.
In this embodiment, refer to FIG. 4, wherein S is modulated11Simulation result curve representing S11 parameter, normalized S12Simulation result curve, Measured S, representing the S12 parameter11A measured result curve representing the parameter S11, normalized S12A measured result curve representing the S12 parameter; it can be seen that the result trends of actual measurement and simulation are the same, which indicates that the design is successful and feasible, and the actual measurement result of the design in the real environment through the vector net analyzer is: the center frequency is 3.58GHz, the relative bandwidth is 9.7%, the insertion loss in the pass band range is-2.4 +/-0.2 dB, the return loss is less than-9 dB, the upper stop band and the lower stop band have three transmission zeros, the frequencies are respectively 3.24GHz, 3.77GHz and 3.98GHz, the selectivity of the circuit is good, the out-of-band rejection can realize the rejection higher than-20 dB, and the data also proves the advantages of the invention.
While the preferred embodiments and basic principles of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments, but is intended to cover various modifications, equivalents and alternatives falling within the scope of the invention as claimed.
Claims (10)
1. A four-mode dielectric bandpass filter, comprising: the high-power-efficiency optical fiber sensor comprises a substrate, a metal cover plate, a metal cavity, a medium unit, a first SMA connector and a second SMA connector, wherein the first SMA connector and the second SMA connector are used for signal input or signal output, a first microstrip line and a second microstrip line are arranged on the top layer of the substrate, a first strip line and a second strip line are arranged on the side face of the medium unit, the first strip line and the second strip line are respectively arranged on two opposite side faces of the medium unit and are perpendicular to the horizontal direction, a third microstrip line and a fourth microstrip line are arranged on the bottom face of the medium unit, one end of each of the first microstrip line and the third microstrip line is connected with one end of the first strip line, one end of each of the second microstrip line and the fourth microstrip line is connected with one end of the second strip line, the first strip line is perpendicular to the first microstrip line and the third microstrip line, and the second strip line is perpendicular to the second microstrip, A fourth microstrip line; the metal cavity is provided with a metal cover plate, a metal cavity body, a dielectric unit, a substrate, a first SMA connector, a second SMA connector, a first microstrip line and a second microstrip line, wherein the dielectric unit and the substrate are both arranged in the metal cavity body, the metal cover plate is arranged on the top of the metal cavity body, the dielectric unit is arranged on the substrate, the substrate is in seamless fit with one surface of the metal cavity body, the first SMA connector and the second SMA connector are both arranged on the metal cavity body, the first microstrip line is connected to the first SMA connector.
2. A four-mode dielectric bandpass filter according to claim 1, wherein: the dielectric unit and the substrate are integrally connected.
3. A four-mode dielectric bandpass filter according to claim 1, wherein: the first strip line and the second strip line are both silver strip lines.
4. A four-mode dielectric bandpass filter according to claim 1, wherein: the first microstrip line and the second microstrip line are both copper microstrip lines.
5. A four-mode dielectric bandpass filter according to claim 1, wherein: the third microstrip line and the fourth microstrip line are both silver microstrip lines.
6. A four-mode dielectric bandpass filter according to claim 1, wherein: the bottom layer of the substrate is covered with a copper layer.
7. A four-mode dielectric bandpass filter according to claim 4, characterized in that: the copper microstrip line is a copper 50-ohm impedance matching microstrip line.
8. A four-mode dielectric bandpass filter according to any one of claims 1 to 7, wherein: the dielectric unit is made of ceramic dielectric materials.
9. A four-mode dielectric bandpass filter according to any one of claims 1 to 7, wherein: the substrate is a Teflon substrate.
10. A four-mode dielectric bandpass filter according to any one of claims 1 to 7, wherein: the metal cover plate is installed on the top of the metal cavity through screws or in a buckling mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910038308.8A CN109888442B (en) | 2019-01-16 | 2019-01-16 | Four-mode dielectric band-pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910038308.8A CN109888442B (en) | 2019-01-16 | 2019-01-16 | Four-mode dielectric band-pass filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109888442A CN109888442A (en) | 2019-06-14 |
| CN109888442B true CN109888442B (en) | 2021-02-02 |
Family
ID=66926112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910038308.8A Active CN109888442B (en) | 2019-01-16 | 2019-01-16 | Four-mode dielectric band-pass filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109888442B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563694B (en) * | 2020-11-16 | 2023-03-14 | 中山大学 | Multimode dielectric filter without metal shielding cavity and manufacturing method thereof |
| CN113451721B (en) * | 2021-06-03 | 2022-10-14 | 中山大学 | Dielectric filter based on bottom feed and without metal shielding |
| CN113948835B (en) * | 2021-10-18 | 2022-06-14 | 华南理工大学 | Double-frequency filtering switch based on single four-mode dielectric resonator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005159597A (en) * | 2003-11-25 | 2005-06-16 | Murata Mfg Co Ltd | Resonator apparatus, filter, duplexer, and communication apparatus |
| CN106711557A (en) * | 2017-02-28 | 2017-05-24 | 华南理工大学 | Four-mode dielectric band-pass filter |
| CN106785253A (en) * | 2016-12-02 | 2017-05-31 | 华南理工大学 | A kind of new three moulds medium bandpass filter |
| CN108649310A (en) * | 2018-04-24 | 2018-10-12 | 南通大学 | A kind of individually controllable double-passband filter based on four mould dielectric resonators |
-
2019
- 2019-01-16 CN CN201910038308.8A patent/CN109888442B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005159597A (en) * | 2003-11-25 | 2005-06-16 | Murata Mfg Co Ltd | Resonator apparatus, filter, duplexer, and communication apparatus |
| CN106785253A (en) * | 2016-12-02 | 2017-05-31 | 华南理工大学 | A kind of new three moulds medium bandpass filter |
| CN106711557A (en) * | 2017-02-28 | 2017-05-24 | 华南理工大学 | Four-mode dielectric band-pass filter |
| CN108649310A (en) * | 2018-04-24 | 2018-10-12 | 南通大学 | A kind of individually controllable double-passband filter based on four mould dielectric resonators |
Non-Patent Citations (1)
| Title |
|---|
| Suspended Resonators for Filters-Reduced λg Excitation of Evanescent Cavities Using High Dielectric Constant Feedlines;Richard V. Snyder et al.;《IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES》;20021231;第50卷(第12期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109888442A (en) | 2019-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109888442B (en) | Four-mode dielectric band-pass filter | |
| CN111883914B (en) | Dielectric resonator broadband antenna with filter characteristic based on SIW feeding | |
| KR20000017328A (en) | Dielectric resonator antenna | |
| US20080122559A1 (en) | Microwave Filter Including an End-Wall Coupled Coaxial Resonator | |
| US7068127B2 (en) | Tunable triple-mode mono-block filter assembly | |
| GB2353144A (en) | Combline filter | |
| US7183882B2 (en) | Microstrip band pass filter using end-coupled SIRs | |
| CN112928409A (en) | Microstrip band-pass filter with wide stop band and high selectivity | |
| US6356244B1 (en) | Antenna device | |
| JPS59107603A (en) | Resonator and filter composed of same resonator | |
| CN207368186U (en) | A kind of bandstop filter and communication equipment | |
| US6529094B1 (en) | Dielectric resonance device, dielectric filter, composite dielectric filter device, dielectric duplexer, and communication apparatus | |
| US7696845B2 (en) | Dielectric filter for base station communication equipment | |
| CN101465458B (en) | Miniaturisation high-performance microstrip bimodule band-pass filter | |
| US4313097A (en) | Image frequency reflection mode filter for use in a high-frequency receiver | |
| CN213989159U (en) | Duplexer | |
| KR100337168B1 (en) | Dielectric resonator device, dielectric filter, oscillator, sharing device, and electronic apparatus | |
| CN106654481A (en) | Substrate integrated waveguide filter with independently adjustable double bands | |
| CN111033884B (en) | Filter, duplexer and communication equipment | |
| US20190190107A1 (en) | Planar orthomode transducer | |
| JP2001111302A (en) | Low pass filter and electronic equipment using the same | |
| CN114204237B (en) | Small-size medium loading double-frequency filter of little frequency ratio | |
| CN114204234B (en) | Small-size medium loading broadband filter | |
| US6850131B2 (en) | Bandpass filter | |
| WO2008020735A1 (en) | Dielectric duplexer |
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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240613 Address after: 510000 No. 135 West Xingang Road, Guangdong, Guangzhou Patentee after: SUN YAT-SEN University Country or region after: China Address before: No.9, Nanguo East Road, Yunlu community residents committee, Daliang sub district office, Shunde District, Foshan City, Guangdong Province, 528399 Patentee before: FOSHAN SHUNDE SUN YAT-SEN UNIVERSITY Research Institute Country or region before: China Patentee before: SYSU-CMU SHUNDE INTERNATIONAL JOINT Research Institute Patentee before: SUN YAT-SEN University |