CN106602189B - Annular metal resonant cavity waveguide filter - Google Patents
Annular metal resonant cavity waveguide filter Download PDFInfo
- Publication number
- CN106602189B CN106602189B CN201710032285.0A CN201710032285A CN106602189B CN 106602189 B CN106602189 B CN 106602189B CN 201710032285 A CN201710032285 A CN 201710032285A CN 106602189 B CN106602189 B CN 106602189B
- Authority
- CN
- China
- Prior art keywords
- threaded holes
- cavity
- waveguide
- resonant cavity
- metal
- 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.)
- Expired - Fee Related
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 121
- 239000002184 metal Substances 0.000 title claims abstract description 121
- 230000008878 coupling Effects 0.000 claims abstract description 55
- 238000010168 coupling process Methods 0.000 claims abstract description 55
- 238000005859 coupling reaction Methods 0.000 claims abstract description 55
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000012545 processing Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 239000011135 tin Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
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
- H01P1/207—Hollow waveguide filters
Abstract
The invention discloses an annular metal resonant cavity waveguide filter, which comprises a metal resonant cavity, a first waveguide feed port and a second waveguide feed port, wherein one or more metal plates are embedded in the metal resonant cavity, the metal plates and the metal resonant cavity form an annular metal resonant cavity together, a first feed coupling gap and a second feed coupling gap are respectively formed in the left wall and the right wall of the annular metal resonant cavity, the first feed coupling gap is connected with the first waveguide feed port, and the second feed coupling gap is connected with the second waveguide feed port. The annular metal resonant cavity waveguide filter has the characteristics of high selectivity, high Q value, simple design and processing and the like, and has good filtering performance, simple structure and convenient processing.
Description
Technical Field
The invention relates to a metal resonant cavity filter, in particular to an annular metal resonant cavity waveguide filter, and belongs to the field of wireless communication.
Background
Microwave filters are indispensable devices for transmitting and receiving ends in modern communication systems, and are used for separating signals, allowing useful signals to pass through without attenuation as much as possible, and attenuating useless signals as much as possible to inhibit the passage of the useless signals. With the development of wireless communication technology, the frequency band between signals becomes narrower, which puts higher demands on the specification and reliability of the filter. The rectangular cavity filter has the advantages of high frequency selectivity, low insertion loss, large power capacity, stable performance and the like, and has high application value. Many scholars have studied the passband of the cavity filter generating multiple modes, and the split multiple modes are changed by adjusting the coupling between the resonators to generate transmission zero points, so as to further improve the bandpass performance.
According to investigation and understanding, the prior art that has been disclosed is as follows:
in 1990, f.arnd first proposed the concept of a non-resonant mode of a filter. In subsequent research of scholars, the multi-mode and transmission zero point of the metal cavity filter on the transmission characteristic are realized by utilizing the concept of a non-resonant mode. In a source end excitation mode TE10, a cavity of a source end is coupled with a filter resonant cavity through an aperture, and the position of the aperture and the size of the metal resonant cavity are changed to excite a resonant mode TM120, a TM210 mode and a non-resonant mode TM 11. Meanwhile, the existence of the resonant mode enables a plurality of transmission modes in the transmission passband.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides the annular metal resonant cavity waveguide filter which has the advantages of simple structure, easiness in processing, good performance and the like, can meet the requirements of a communication system and has a wide application range.
The purpose of the invention can be achieved by adopting the following technical scheme:
the utility model provides an annular metal resonant cavity waveguide filter, includes metal resonant cavity, first waveguide feed port and second waveguide feed port, embedded one or polylith metal sheet of metal resonant cavity, metal sheet and metal resonant cavity form annular metal resonant cavity together, it has first feed electric coupling gap and second feed electric coupling gap to open respectively on the left and right wall of annular metal resonant cavity, first feed electric coupling gap is connected with first waveguide feed port, second feed electric coupling gap is connected with second waveguide feed port.
Preferably, the first waveguide feed port and the second waveguide feed port are rectangular waveguide feed ports.
As a preferred scheme, the metal resonant cavity is composed of a first cavity and a second cavity, the first cavity is provided with a plurality of first threaded holes, the second cavity is provided with a plurality of second threaded holes, the positions of the plurality of second threaded holes correspond to the positions of the plurality of first threaded holes, and the second cavity is fixed on the first cavity through screws which are sequentially matched with the second threaded holes and the first threaded holes.
As a preferred scheme, the first cavity is further provided with a groove, each metal plate is provided with two third threaded holes, the positions of the two third threaded holes on each metal plate correspond to the positions of two first threaded holes in the first cavity, the first threaded holes corresponding to the third threaded holes in the metal plate on the first cavity are formed in the groove, and each metal plate is embedded into the groove through the cooperation of screws with the second threaded holes, the third threaded holes and the first threaded holes in sequence.
As a preferable scheme, the first cavity is further provided with four fourth threaded holes near the first feed coupling slit, four corners of the first waveguide feed port are respectively provided with fifth threaded holes, the positions of the four fifth threaded holes correspond to the positions of the four fourth threaded holes, and the first waveguide feed port is fixed on the first cavity by screws sequentially matching with the fifth threaded holes and the fourth threaded holes;
the second cavity is further provided with four sixth threaded holes near the second feed coupling gap, the four corners of the second waveguide feed port are respectively provided with seventh threaded holes, the positions of the four seventh threaded holes correspond to the positions of the four sixth threaded holes, and the second waveguide feed port is fixed on the second cavity through the cooperation of screws with the seventh threaded holes and the sixth threaded holes in sequence.
As a preferable scheme, the first feed coupling gap is a rectangular structure with two long sides arranged up and down and two short sides arranged left and right when viewed from the outer side surface of the left wall of the annular metal resonant cavity;
the second feed coupling gap is of a rectangular structure with two long sides arranged up and down and two short sides arranged left and right when viewed from the outer side surface of the right wall of the annular metal resonant cavity;
preferably, the first waveguide feed port is symmetrical to the second waveguide feed port, and the first feed coupling slot is symmetrical to the second feed coupling slot.
As a preferable scheme, the metal resonant cavity is a rectangular metal resonant cavity.
Compared with the prior art, the invention has the following beneficial effects:
1. in the filter, one or more metal plates can be embedded in the metal resonant cavity, the metal plates and the metal resonant cavity form the annular metal resonant cavity together, the left wall and the right wall of the annular metal resonant cavity are respectively provided with a feed coupling gap, each feed coupling gap is connected with a waveguide feed port, the multimode and the position of a transmission zero point of the filter can be controlled by adjusting the size of the metal resonant cavity, the number and the size of the metal plates and the position of the feed coupling gap, and the whole filter has the advantages of simple structure, easy processing, good performance and the like, can meet the requirements of a communication system, and has wide application range.
2. In the frequency range of 9.96-10.04 GHz, the filter has the value of S11|, which is below-10 dB, and has two or more obvious resonance points (determined by the number of metal plates), so that the multimode metal cavity filter with the transmission zero point can meet the characteristics of high selectivity, high Q value, simple design and processing and the like, and has simple structure and convenient processing and realization while realizing good filtering performance.
Drawings
Fig. 1 is a schematic structural diagram of a ring-shaped metal resonator waveguide filter according to embodiment 1 of the present invention.
Fig. 2 is a front view of a ring-shaped metal resonator waveguide filter structure in embodiment 1 of the present invention.
Fig. 3 is a left side view of the structure of the ring-shaped metal resonator waveguide filter according to embodiment 1 of the present invention.
Fig. 4 is a top view of the structure of the ring-shaped metal resonator waveguide filter according to embodiment 1 of the present invention.
Fig. 5 is an electromagnetic simulation graph of the frequency response of the ring-shaped metal resonator waveguide filter according to embodiment 1 of the present invention.
Fig. 6 is a schematic processing diagram of a ring-shaped metal resonator waveguide filter according to embodiment 1 of the present invention.
The waveguide resonator comprises a metal resonant cavity 1, a first waveguide feed port 2, a second waveguide feed port 3, a metal plate 4, a first feed coupling gap 5, a second feed coupling gap 6, a first cavity 7, a second cavity 8, a first threaded hole 9, a second threaded hole 10, a groove 11, a third threaded hole 12, a fifth threaded hole 13, a sixth threaded hole 14 and a seventh threaded hole 15.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
Example 1:
as shown in fig. 1 to 4, the ring-shaped metal resonator waveguide filter of the present embodiment includes a metal resonator 1, a first waveguide feed port 2, and a second waveguide feed port 3.
The metal resonant cavity 1 is a rectangular metal resonant cavity, a metal plate 4 is embedded in the metal resonant cavity, and the metal plate 4 and the metal resonant cavity 1 form an annular metal resonant cavity together; the left wall and the right wall of the annular metal resonant cavity are respectively provided with a first feed coupling gap 5 and a second feed coupling gap 6, the first feed coupling gap 5 is connected with the first waveguide feed port 2, the second feed coupling gap 6 is connected with the second waveguide feed port 3, and the multimode and transmission zero positions of the filter can be controlled by adjusting the size of the metal resonant cavity 1, the size of the metal plate 4 and the positions of the feed coupling gaps (the first feed coupling gap 5 and the second feed coupling gap 6).
In the present embodiment, the first waveguide feed port 2 and the second waveguide feed port 3 are rectangular waveguide feed ports; the first feed coupling gap 5 is a rectangular structure with two long sides arranged up and down and two short sides arranged left and right when viewed from the outer side surface of the left wall of the annular metal resonant cavity; the second feed coupling gap 6 is a rectangular structure with two long sides arranged up and down and two short sides arranged left and right when viewed from the outer side surface of the right wall of the annular metal resonant cavity; the first waveguide feed port 2 is symmetrical to the second waveguide feed port 3, and the first feed coupling slot 5 is symmetrical to the second feed coupling slot 6.
The working principle of the annular metal resonant cavity waveguide filter of the embodiment is as follows: energy is input from the first waveguide feed port 2, the energy is transmitted into the annular metal resonant cavity through the first feed coupling gap 5, the energy is transmitted into the annular metal resonant cavity through the second feed coupling gap 6 to the second waveguide feed port 3, and the energy is output from the second waveguide feed port 3.
An electromagnetic simulation curve of the frequency response of the ring-shaped metal resonator waveguide filter of the present embodiment is shown in fig. 5, in which a solid line represents | S11|, which is the return loss of the input port (first waveguide feed port); the dotted line represents | S21|, which is the forward transmission coefficient from the input port (first waveguide feed port) to the output port (second waveguide feed port), and it can be seen that in the frequency range of 9.96-10.04 GHz, | S11|, the values are all below-10 dB, and there are two distinct resonance points (i.e. the metal plate and the two feed coupling slots, which constitute a dual-mode resonator).
As shown in fig. 6, the ring-shaped metal resonator waveguide filter of the present embodiment is processed as follows:
1) a rectangular metal resonant cavity is cut into a first cavity 7 and a second cavity 8, and the whole annular metal resonant cavity waveguide filter consists of the first cavity 7, the second cavity 8, a metal plate 4, a first waveguide feed port 2 and a second waveguide feed port 3;
2) four first threaded holes 9 are formed in the first cavity 7, four second threaded holes 10 are formed in the second cavity 8, and the positions of the four first threaded holes 9 correspond to the positions of the four second threaded holes 10;
3) a groove 11 is formed in the first cavity 7, the groove 11 is used for fixing the metal plate 4, two first threaded holes 9 are formed in the groove 11, two third threaded holes 12 are formed in the metal plate 4, and the positions of the two third threaded holes 12 correspond to the positions of the two first threaded holes 9 in the groove 11;
4) a first feed coupling gap 5 is formed in the wall of the first cavity 7, four fourth threaded holes (not shown in the figure) are formed near the first feed coupling gap 5, fifth threaded holes 13 are formed at four corners of the first waveguide feed port 2, and the positions of the four fifth threaded holes 13 correspond to the positions of the four fourth threaded holes; a second feed coupling gap 6 is formed in the wall of the second cavity 8, four sixth threaded holes 14 are formed near the second feed coupling gap 6, seventh threaded holes 15 are formed at four corners of the second waveguide feed port 3, and the positions of the four seventh threaded holes 15 correspond to the positions of the four sixth threaded holes 14;
5) the first waveguide feed port 2 is fixed on the first cavity 7 through the screw matching with the fifth threaded hole 13 and the fourth threaded hole in sequence, and the second waveguide feed port 3 is fixed on the second cavity 8 through the screw matching with the seventh threaded hole 15 and the sixth threaded hole 14 in sequence;
6) the metal plate 4 is embedded into the groove 11 through the cooperation of the screws with the two second threaded holes 10, the two third threaded holes 12 and the two first threaded holes 9 in sequence, the second cavity 8 is fixed on the first cavity 7 through the cooperation of the screws with the other two second threaded holes 10 and the other two first threaded holes 9 in sequence, namely, the second cavity 8, the metal plate 4 and the first cavity 7 are fixed together, the whole annular metal resonant cavity waveguide filter is processed, and finally the test is carried out.
Example 2:
this embodiment is different from embodiment 1 in that: a plurality of metal plates 4 can be embedded in the metal resonant cavity 1, and the multimode and the position of a transmission zero point of the filter can be controlled by adjusting the size of the metal resonant cavity 1, the number and the size of the metal plates 4 and the positions of the feed coupling gaps (the first feed coupling gap 5 and the second feed coupling gap 6).
In the above embodiments 1 and 2, the metal material used for the metal resonator 1 and the metal plate 4 may be any one of aluminum, iron, tin, copper, silver, gold, and platinum, or may be an alloy of any one of aluminum, iron, tin, copper, silver, gold, and platinum.
In summary, in the filter of the present invention, one or more metal plates may be embedded in the metal resonant cavity, the metal plates and the metal resonant cavity form an annular metal resonant cavity together, the left and right walls of the annular metal resonant cavity are respectively provided with a feed coupling gap, each feed coupling gap is connected to one waveguide feed port, the multimode and transmission zero position of the filter can be controlled by adjusting the size of the metal resonant cavity, the number and size of the metal plates, and the feed coupling gap.
The above description is only for the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the scope of the present invention.
Claims (8)
1. The utility model provides an annular metal resonant cavity waveguide filter, includes the metal resonant cavity, its characterized in that: the metal resonant cavity is internally embedded with one or more metal plates, the metal plates and the metal resonant cavity form an annular metal resonant cavity together, the left wall and the right wall of the annular metal resonant cavity are respectively provided with a first feed coupling gap and a second feed coupling gap, the left wall and the right wall of the annular metal resonant cavity are respectively positioned at two opposite sides of the metal plates, the first feed coupling gap is connected with the first waveguide feed port, and the second feed coupling gap is connected with the second waveguide feed port; by adjusting the size of the metal resonant cavity, the number and the size of the metal plates and the position of the feed coupling gap, a plurality of modes of the filter and the position of a transmission zero point can be controlled.
2. The ring-shaped metal resonator waveguide filter of claim 1, wherein: the first waveguide feed port and the second waveguide feed port are rectangular waveguide feed ports.
3. The ring-shaped metal resonator waveguide filter of claim 2, wherein: the metal resonant cavity is composed of a first cavity and a second cavity, a plurality of first threaded holes are formed in the first cavity, a plurality of second threaded holes are formed in the second cavity, the positions of the second threaded holes correspond to those of the first threaded holes, and the second cavity is fixed on the first cavity through screws which are matched with the second threaded holes and the first threaded holes in sequence.
4. The ring-shaped metal resonator waveguide filter of claim 3, wherein: the first cavity is further provided with a groove, each metal plate is provided with two third threaded holes, the positions of the two third threaded holes in each metal plate correspond to the positions of the two first threaded holes in the first cavity, the first threaded holes in the first cavity, corresponding to the third threaded holes in the metal plates, are formed in the groove, and each metal plate is embedded into the groove through the cooperation of screws with the second threaded holes, the third threaded holes and the first threaded holes in sequence.
5. The ring-shaped metal resonator waveguide filter of claim 3, wherein:
the first cavity is also provided with four fourth threaded holes near the first feed coupling gap, four corners of the first waveguide feed port are respectively provided with fifth threaded holes, the positions of the four fifth threaded holes correspond to the positions of the four fourth threaded holes, and the first waveguide feed port is fixed on the first cavity through the cooperation of screws with the fifth threaded holes and the fourth threaded holes in sequence;
the second cavity is further provided with four sixth threaded holes near the second feed coupling gap, the four corners of the second waveguide feed port are respectively provided with seventh threaded holes, the positions of the four seventh threaded holes correspond to the positions of the four sixth threaded holes, and the second waveguide feed port is fixed on the second cavity through the cooperation of screws with the seventh threaded holes and the sixth threaded holes in sequence.
6. The annular metal resonator cavity waveguide filter of any of claims 1-5, wherein:
the first feed coupling gap is of a rectangular structure with two long sides arranged up and down and two short sides arranged left and right when viewed from the outer side surface of the left wall of the annular metal resonant cavity;
the second feed coupling gap is of a rectangular structure with two long sides arranged up and down and two short sides arranged left and right when viewed from the outer side surface of the right wall of the annular metal resonant cavity;
7. the annular metal resonator cavity waveguide filter of any of claims 1-5, wherein: the first waveguide feed port is symmetrical to the second waveguide feed port, and the first feed coupling gap is symmetrical to the second feed coupling gap.
8. The annular metal resonator cavity waveguide filter of any of claims 1-5, wherein: the metal resonant cavity is a rectangular metal resonant cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710032285.0A CN106602189B (en) | 2017-01-16 | 2017-01-16 | Annular metal resonant cavity waveguide filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710032285.0A CN106602189B (en) | 2017-01-16 | 2017-01-16 | Annular metal resonant cavity waveguide filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106602189A CN106602189A (en) | 2017-04-26 |
| CN106602189B true CN106602189B (en) | 2020-04-28 |
Family
ID=58586036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710032285.0A Expired - Fee Related CN106602189B (en) | 2017-01-16 | 2017-01-16 | Annular metal resonant cavity waveguide filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106602189B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112522A (en) * | 2019-05-31 | 2019-08-09 | 河南思维轨道交通技术研究院有限公司 | A kind of high Q dual mode filter of stack based on gap waveguide technology |
| CN110364795B (en) * | 2019-08-05 | 2021-04-30 | 中电科思仪科技股份有限公司 | Compact vertical coupling band-pass waveguide filter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102544649A (en) * | 2012-01-04 | 2012-07-04 | 西安电子科技大学 | One-cavity three-mode filter |
| CN103000980A (en) * | 2011-09-16 | 2013-03-27 | 深圳光启高等理工研究院 | Resonant cavity |
| CN105161807A (en) * | 2015-09-21 | 2015-12-16 | 电子科技大学 | Tunable terahertz waveguide filter based on bimorph thermal actuator |
| CN105514543A (en) * | 2015-12-22 | 2016-04-20 | 华南理工大学 | Metal cavity duplexer |
| CN206564314U (en) * | 2017-01-16 | 2017-10-17 | 华南理工大学 | A kind of endless metal resonator waveguide filter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030206082A1 (en) * | 2002-05-06 | 2003-11-06 | Chen Ming Hui | Waveguide filter with reduced harmonics |
| US20060006966A1 (en) * | 2004-07-08 | 2006-01-12 | Qinghua Kang | Electronically tunable ridged waveguide cavity filter and method of manufacture therefore |
-
2017
- 2017-01-16 CN CN201710032285.0A patent/CN106602189B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000980A (en) * | 2011-09-16 | 2013-03-27 | 深圳光启高等理工研究院 | Resonant cavity |
| CN102544649A (en) * | 2012-01-04 | 2012-07-04 | 西安电子科技大学 | One-cavity three-mode filter |
| CN105161807A (en) * | 2015-09-21 | 2015-12-16 | 电子科技大学 | Tunable terahertz waveguide filter based on bimorph thermal actuator |
| CN105514543A (en) * | 2015-12-22 | 2016-04-20 | 华南理工大学 | Metal cavity duplexer |
| CN206564314U (en) * | 2017-01-16 | 2017-10-17 | 华南理工大学 | A kind of endless metal resonator waveguide filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106602189A (en) | 2017-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103633400B (en) | A kind of micro-strip duplexer based on electromagnetism hybrid coupled | |
| CN203707287U (en) | Source and multiple resonators-coupled substrate integrated waveguide filter | |
| CN103367844B (en) | Multi-branch loading-based three passband high-temperature superconductive filter | |
| CN105428765B (en) | A kind of Metal cavity filter of the embedded slotted metal plate with low frequency zero point | |
| CN114430099B (en) | E-surface terahertz waveguide filter based on novel dual-mode resonant cavity | |
| US11223096B2 (en) | Dual-channel filter based on dielectric resonator | |
| EP3059799B1 (en) | Dielectric resonator and dielectric filter | |
| CN104393386A (en) | Small MIMO system based on novel composite right-left hand (CRLH) transmission line technology | |
| CN109149037A (en) | A kind of medium bimodule band-pass filter and control method based on TM mode | |
| CN104577268A (en) | Planar lowpass-bandpass triplexer | |
| CN109509950A (en) | A kind of compact dual-frequency waveguide filter | |
| CN103390784A (en) | Miniaturized substrate integration waveguide duplexer | |
| CN103825075A (en) | T-shaped branch loading built-in antenna combiner | |
| CN106602189B (en) | Annular metal resonant cavity waveguide filter | |
| CN102324616A (en) | Super power microwave resonator structure | |
| CN201859933U (en) | Ka-band E-surface longitudinal diaphragm loading waveguide filter | |
| CN101599568B (en) | Band-pass filter capable of suppressing second harmonic | |
| CN103474729A (en) | Multi-frequency band elimination filter | |
| CN106711604B (en) | Waveguide feed-based single-cavity triplexer triple-frequency slot antenna | |
| CN107768782B (en) | Duplexer based on rectangular microstrip structure | |
| CN109390644B (en) | Double-cavity four-mode dielectric waveguide filter | |
| CN106816675A (en) | Cavity type bandstop filter and radio-frequency devices | |
| CN203085714U (en) | Substrate integrated waveguide filter with direct coupling between source and load | |
| CN204375881U (en) | Plane lower passband leads to triplexer | |
| CN107768788B (en) | Duplexer based on elliptical microstrip structure |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200428 |