CN108832240B - Dielectric waveguide filter capable of improving far-end inhibition - Google Patents
Dielectric waveguide filter capable of improving far-end inhibition Download PDFInfo
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- CN108832240B CN108832240B CN201810582848.8A CN201810582848A CN108832240B CN 108832240 B CN108832240 B CN 108832240B CN 201810582848 A CN201810582848 A CN 201810582848A CN 108832240 B CN108832240 B CN 108832240B
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- 230000005764 inhibitory process Effects 0.000 title claims abstract description 8
- 230000008878 coupling Effects 0.000 claims abstract description 27
- 238000010168 coupling process Methods 0.000 claims abstract description 27
- 238000005859 coupling reaction Methods 0.000 claims abstract description 27
- 239000003989 dielectric material Substances 0.000 claims abstract description 11
- 230000008054 signal transmission Effects 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 8
- 230000001629 suppression Effects 0.000 claims description 12
- 229910052709 silver Inorganic materials 0.000 claims description 7
- 239000004332 silver Substances 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000005476 soldering Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000013461 design 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
- 230000010354 integration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
Classifications
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- 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
- H01P1/2002—Dielectric waveguide filters
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Abstract
The application discloses a dielectric waveguide filter capable of improving remote inhibition, which comprises at least 2 bodies made of solid dielectric materials, wherein a plurality of bodies are combined together in a stacked mode, the surfaces of the bodies are coated with conductive layers, the bodies comprise at least 2U-shaped input/output electrodes, the surfaces of the U-shaped input/output electrodes are not provided with conductive layers, the bodies comprise a plurality of resonators which are arranged in an array manner, the resonators are divided by a coupling device positioned between adjacent resonators, signal transmission windows are arranged between the overlapping surfaces of the plurality of bodies, and the surfaces of the signal transmission windows are not provided with conductive layers. The coupling amplitude of the input/output port to the higher resonant mode of the dielectric waveguide can be weakened by optimizing the U-shaped output/output electrode, so that the second harmonic position can be shifted further, and the amplitude of the 2 nd harmonic can be reduced.
Description
Technical Field
The application belongs to the technical field of communication, and particularly relates to a dielectric waveguide filter.
Background
The invention relates to a patent US005926079A which is issued by David R.Heine et al in 7.20 1999 and a patent CN 104871364A which is applied by R. Fan Jiala et al in 26.2015, wherein a dielectric waveguide filter disclosed by the patent is provided with a through hole or a blind hole by drilling and is externally connected with a coaxial connector to achieve the purpose of inputting and outputting signals. The structure is complex to process, the precision requirement is higher, the far-end inhibition is not ideal, the harmonic wave is generally generated at the position of 1.3-1.4 times of the center frequency, the harmonic wave amplitude is higher, the better effect can be achieved only through the processing of an external low-pass filter under the condition of the inhibition requirement on the frequency band, but the superposition of the insertion loss can be brought after the low-pass filter is superimposed under the normal condition, and the whole volume can be increased.
In addition, in patent CN 104871364A filed by r. Fan Jiala et al at 8/26 in 2015, a plurality of dielectric bodies are spliced together in a stacked manner to achieve the purpose of reducing the overall size, but this method makes the hole type input/output of the filter no longer located at the bottom of the filter, so that after the filter is mounted to the communication system, other forms such as cables are still required to guide the signals of the filter to the circuit board of the communication system, which is not beneficial to miniaturization and system integration of the system.
Disclosure of Invention
The invention aims to provide a dielectric waveguide filter capable of improving far-end inhibition so as to overcome the defects in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The embodiment of the application discloses a dielectric waveguide filter capable of improving remote inhibition, which comprises at least 2 bodies made of solid dielectric materials, wherein a plurality of bodies are combined together in a stacked mode, the surfaces of the bodies are coated with conductive layers, the bodies comprise at least 2U-shaped input and output electrodes, the surfaces of the U-shaped input and output electrodes are not provided with conductive layers, the bodies comprise a plurality of resonators which are arranged in an array manner, the resonators are divided by a coupling device positioned between adjacent resonators, signal transmission windows are arranged between the overlapping surfaces of the plurality of bodies, and the surfaces of the signal transmission windows are not provided with conductive layers.
Preferably, in the dielectric waveguide filter capable of improving the far-end suppression, the U-shaped input/output electrode is located on a short-side extension surface or a long-side extension surface of the waveguide of the body.
Preferably, the dielectric waveguide filter with improved distal suppression, the U-shaped input-output electrode is a variation of the C-shape.
Preferably, said dielectric waveguide filter with improved distal suppression is provided with 2 or more of said resonators per said body arrangement.
Preferably, the dielectric waveguide filter capable of improving the far-end suppression is characterized in that the coupling device is a through hole or a rectangular groove parallel to the short side direction of the waveguide, and the surface of the through hole or the groove is covered with a conductive layer.
Preferably, the dielectric waveguide filter capable of improving distal suppression, and the solid dielectric material is ceramic or quartz glass.
Preferably, the dielectric waveguide filter capable of improving distal suppression is made of silver or copper.
Compared with the prior art, the invention has the advantages that: the coupling amplitude of the input/output port to the higher resonant mode of the dielectric waveguide can be weakened by optimizing the U-shaped output/output electrode, so that the second harmonic position can be shifted further, and the amplitude of the 2 nd harmonic can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the description of the embodiments or the prior art will be briefly described below, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
FIG. 1 shows a 6-cavity modified distal end suppression dielectric waveguide filter with coupling vias;
FIG. 2 shows an improved distal end suppressing dielectric waveguide filter with a coupling slot in the 6-cavity;
FIG. 3 illustrates various embodiments of a U-shaped output electrode of the present invention;
FIG. 4 is a graph of a conventional dielectric waveguide filter in blind via or through-hole input/output form;
fig. 5 is a graph of a simulation of an improved distal end suppressing dielectric waveguide filter in the form of a U-shaped output.
Detailed Description
The following describes the technical solution in the embodiment of the present invention in detail with reference to fig. 1 in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, but not all the embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. In the following, a 6-cavity resonator is taken as an example, and it should be noted that the present invention is equally applicable to dielectric waveguide filters with other numbers of resonators.
Referring to fig. 1, a dielectric waveguide filter for improved far-end rejection, comprising: the bodies 10 and 20, which are made of solid dielectric material, are combined together in a stacked form. The surfaces of the bodies 10, 20 are coated with conductive silver layers.
The body 10, 20 contains 2U-shaped input-output electrodes 101, 201, and the surface of the U-shaped input-output electrodes 101, 201 is free of conductive layers.
More specifically, the U-shaped input-output electrode 101 is located on the extension surface of the short side e1 of the waveguide resonator; the U-shaped input-output electrode 201 is located on the extension of the short side e2 of the waveguide resonator.
More specifically, the input-output coupling amplitude of the filter can be adjusted by adjusting the slot widths, the dimensions, and the positions of the U-shaped input-output electrodes 101 and 201 on the surfaces of the resonators 102 and 202.
The body 10 includes 3 resonators 102, 103, 104 arranged in an array, wherein the resonators 102 and 103 are divided by coupling through holes 105a, 105b located between adjacent resonators; likewise, the resonators 103 and 104 are divided by coupling through holes 106a, 107b located between adjacent resonators. The walls of the holes 105a, 105b, 106a, 106b are covered with a conductive silver layer.
Likewise, the body 20 includes 3 resonators 202, 203, 204 arranged in an array, wherein the resonators 202 and 203 are divided by coupling through holes 205a, 205b located between adjacent resonators; likewise, the resonators 203 and 204 are divided by coupling through holes 206a, 207b located between adjacent resonators. The walls of the holes 205a, 205b, 206a, 206b are covered with a conductive silver layer.
More specifically, the coupling through holes 105a, 105b, 106a, 106b are parallel to the short side e1 of the waveguide resonator; the coupling through holes 205a, 205b, 206a, 206b are parallel to the short side e2 of the waveguide resonator;
More specifically, resonators 102 and 103 are radio frequency coupled by a dielectric material located between coupling vias 105a and 105 b. By adjusting the spacing of 105a and 105b, the amount of radio frequency coupling of resonator 102 and resonator 103 can be adjusted. Likewise, the amount of mutual coupling between the other resonators is controlled by the coupling through-holes located between the two resonators.
Between the overlapping surfaces of the bodies 10 and 20, signal transmission windows 107 and 108 are formed, and the surfaces of the signal transmission windows 107 and 108 are not provided with conductive layers.
More specifically, the radio frequency signals are radio frequency coupled between the bodies 10 and 20 through the signal transmission windows 107 and 108.
More specifically, by adjusting the size and position of the signal transmission windows 107 and 108, the rf coupling amplitude between the filter bodies 10 and 20 can be adjusted.
This embodiment has the following advantages: by adopting proper design of U-shaped input and output windows, the coupling amplitude of the input and output to the higher resonant mode of the dielectric waveguide can be reduced, so that the 2 nd harmonic of the dielectric waveguide filter is pushed away to 1.5-1.7 times of the center frequency; compared with the 2 nd harmonic wave of the traditional dielectric waveguide filter adopting a blind hole or through hole input/output mode, the requirement of a communication link on a low-pass filter is reduced. (the 2 nd harmonic of the traditional dielectric waveguide filter adopting the blind hole or through hole input/output mode is about 1.3-1.4 times of the center frequency)
The processing technology of the filter is simplified by adopting a surface-mounted U-shaped input-output structure; in addition, the surface-mounted U-shaped input-output structure is more suitable for SMT mounting technology, and the manufacturing and using cost of the filter is reduced. In addition, when the filter is installed in a communication system, the microstrip line and the U-shaped input/output port of the waveguide filter can be directly connected through soldering, so that the high integration and miniaturization design of the communication system are facilitated.
In the second embodiment, as shown in fig. 2, the closed positions of the U-shaped input-output electrodes 301 and 401 of the filter are located on the extension surfaces of the short sides e3 and e4 of the waveguide resonator, respectively; further, the open ends of the U-shaped input-output electrodes 301 and 401 are located on the extension surfaces of the long sides d3 and d4 of the waveguide resonator, respectively.
Furthermore, the purpose of debugging the coupling amplitude of the input and output electrodes of the filter can be achieved by polishing electrode grooves of the U-shaped input and output electrodes on the extending surfaces of the long sides d3 and d4 of the waveguide resonator.
In a second embodiment, shown in fig. 2, resonators 302 and 303 are coupled to each other by rectangular recess 305.
More specifically, by adjusting the groove widths and the groove depths of the coupling grooves 305, 306, 405, 406, the coupling amplitudes between the adjacent 2 resonators can be adjusted.
This embodiment, like the first embodiment, can push the 2 nd harmonic of the dielectric waveguide filter far to 1.5-1.7 times the center frequency.
It should be noted that the U-shaped input-output structure is various in form, and includes a variation of the U-shaped-like input-output structure shown in fig. 3 in addition to the U-shaped input-output structure described in the first embodiment example and the second embodiment example. Methods for achieving this technical effect by changing the input/output shape or position of the dielectric waveguide filter should fall within the scope of the present application.
Further, the solid dielectric material is preferably ceramic. The ceramic has higher dielectric constant and better hardness and high temperature resistance, so the ceramic becomes a common solid dielectric material in the field of radio frequency filters. Of course, other materials known to those skilled in the art, such as glass, electrically insulating polymers, etc., may be used as the dielectric material.
Further, the conductive layer is silver.
The conductive layer is preferably a high conductivity material such as silver.
The conventional technical means is that the dielectric waveguide filter adopts a through hole or a blind hole and is externally connected with a coaxial connector to form an input/output port, and the following two schemes are adopted for comparison under the same limiting condition: the same appearance volume, the same dielectric material and the same external shielding effect are consistent in index debugging (the insertion loss in the passband and the out-of-band suppression value at the near end are unified as the basis for comparison).
Referring to fig. 4, a simulation graph of a dielectric waveguide filter with a conventional through hole or blind hole and an external coaxial connector to form an input/output port can be seen from the graph as follows:
center frequency: 3.5GHz; setting the bandwidth: 3.4-3.6GHz
The far-end out-of-band second harmonic is located at 4.9GHz, at 1.4 times the center frequency.
Referring to fig. 5, a simulation graph of a dielectric waveguide filter with a U-shaped surface mount input/output structure is shown, and the following indexes can be seen from the graph:
center frequency: 3.5GHz; setting the bandwidth: 3.4-3.6GHz
The far-end out-of-band second harmonic is located at 5.5GHz, at 1.57 times the center frequency.
Through the comparison of simulation result data of the two schemes, the dielectric waveguide filter adopting the U-shaped surface-mounted input-output structure can improve the remote suppression, the second harmonic position can be shifted to a farther position, the suppression effect is enhanced, and the example is mainly embodied in the out-of-band suppression index of 4.9 GHz-6 GHz.
And through experiments, the longer the U-shaped input/output port of the dielectric waveguide filter moves towards the direction of the second resonator, the further the second harmonic position shifts.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely illustrative of the embodiments of this application and it will be appreciated by those skilled in the art that variations and modifications may be made without departing from the principles of the application, and it is intended to cover all modifications and variations as fall within the scope of the application.
Claims (4)
1. The dielectric waveguide filter capable of improving remote inhibition is characterized by comprising at least 2 bodies made of solid dielectric materials, wherein a plurality of bodies are combined together in a stacked mode, the surfaces of the bodies are coated with conductive layers, the bodies comprise at least 2U-shaped input/output electrodes, the surfaces of the U-shaped input/output electrodes are free of conductive layers, the bodies comprise a plurality of resonators which are arranged in a arrayed mode, the resonators are divided by a coupling device positioned between adjacent resonators, signal transmission windows are formed between the overlapping surfaces of the plurality of bodies, the surfaces of the signal transmission windows are free of conductive layers, U-shaped input/output electric limits define U-shaped input/output ports, microstrip lines are connected with the U-shaped input/output ports through soldering,
The input-output coupling amplitude of the filter is adjusted by adjusting the groove width and the size of the U-shaped input-output electrode and the position of the U-shaped input-output electrode on the surface of the resonator, so that the coupling amplitude of the input-output port to the higher resonant mode of the dielectric waveguide is weakened, the second harmonic position can be shifted further,
The solid dielectric material is ceramic or quartz glass, and the conductive layer is silver or copper.
2. The dielectric waveguide filter of claim 1, wherein the U-shaped input-output electrode is located on a short side extension or a long side extension of the waveguide of the body.
3. The improved distal end suppression dielectric waveguide filter of claim 1, wherein said U-shaped input-output electrode is a variation of a U-shape.
4. The dielectric waveguide filter of claim 1, wherein the coupling means is a through hole or a rectangular groove parallel to the short side direction of the waveguide, and the surface of the through hole or the rectangular groove is covered with a conductive layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810582848.8A CN108832240B (en) | 2018-06-07 | 2018-06-07 | Dielectric waveguide filter capable of improving far-end inhibition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810582848.8A CN108832240B (en) | 2018-06-07 | 2018-06-07 | Dielectric waveguide filter capable of improving far-end inhibition |
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| CN108832240B true CN108832240B (en) | 2024-06-04 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494489B (en) * | 2018-12-06 | 2023-09-29 | 京信通信技术(广州)有限公司 | Filtering integrated base station antenna |
| WO2020118523A1 (en) * | 2018-12-11 | 2020-06-18 | 深圳市麦捷微电子科技股份有限公司 | Dielectric waveguide filter having two cavities and four modes |
| WO2020132973A1 (en) * | 2018-12-26 | 2020-07-02 | 华为技术有限公司 | Dielectric filter, duplexer, and communication device |
| CN109560355B (en) * | 2018-12-28 | 2024-05-14 | 重庆思睿创瓷电科技有限公司 | Dielectric body for 5G communication, dielectric waveguide filter, radio frequency module and base station |
| CN111384546A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter and communication equipment |
| CN109616725A (en) * | 2018-12-29 | 2019-04-12 | 扬州江嘉科技有限公司 | A kind of novel medium waveguide filter |
| CN110224205A (en) * | 2019-05-30 | 2019-09-10 | 江苏灿勤科技股份有限公司 | Surface-mount type dielectric filter containing through-hole type input/output structure |
| US11437691B2 (en) * | 2019-06-26 | 2022-09-06 | Cts Corporation | Dielectric waveguide filter with trap resonator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001284905A (en) * | 2000-03-31 | 2001-10-12 | Ngk Spark Plug Co Ltd | Dielectric filter and waveform control method therefor |
| JP2003224405A (en) * | 2002-01-31 | 2003-08-08 | Ube Ind Ltd | Dielectric filter |
| CN106450603A (en) * | 2016-08-24 | 2017-02-22 | 张家港保税区灿勤科技有限公司 | Filter for transmitting part of base station |
| CN106910968A (en) * | 2017-04-25 | 2017-06-30 | 四川省韬光通信有限公司 | A kind of dielectric waveguide filter |
| CN208706823U (en) * | 2018-06-07 | 2019-04-05 | 张家港保税区灿勤科技有限公司 | The dielectric waveguide filter that distal end inhibits can be improved |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001284905A (en) * | 2000-03-31 | 2001-10-12 | Ngk Spark Plug Co Ltd | Dielectric filter and waveform control method therefor |
| JP2003224405A (en) * | 2002-01-31 | 2003-08-08 | Ube Ind Ltd | Dielectric filter |
| CN106450603A (en) * | 2016-08-24 | 2017-02-22 | 张家港保税区灿勤科技有限公司 | Filter for transmitting part of base station |
| CN106910968A (en) * | 2017-04-25 | 2017-06-30 | 四川省韬光通信有限公司 | A kind of dielectric waveguide filter |
| CN208706823U (en) * | 2018-06-07 | 2019-04-05 | 张家港保税区灿勤科技有限公司 | The dielectric waveguide filter that distal end inhibits can be improved |
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