CN107534197A - Dielectric filter, transceiver and base station - Google Patents
Dielectric filter, transceiver and base station Download PDFInfo
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- CN107534197A CN107534197A CN201580079291.0A CN201580079291A CN107534197A CN 107534197 A CN107534197 A CN 107534197A CN 201580079291 A CN201580079291 A CN 201580079291A CN 107534197 A CN107534197 A CN 107534197A
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- dielectric filter
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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
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
- H01P1/2088—Integrated in a substrate
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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
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
- H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
- H01P1/2056—Comb filters or interdigital filters with metallised resonator holes in a dielectric block
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The embodiments of the invention provide a kind of dielectric filter, is related to communication device components technical field, there is provided a kind of new to realize cross-linked dielectric filter structure.Dielectric filter provided in an embodiment of the present invention includes at least three dielectric resonant chambers, and each resonator includes debugging hole, and for debugging hole position on body, each hole of debugging forms resonator with surrounding body；Also include blind hole between non-conterminous resonator two-by-two, blind hole is used to realize cross-couplings.Dielectric resonator provided in an embodiment of the present invention, which simplifies, realizes capacity coupled structure so that structure more minimizes.
Description
The present invention relates to communication device components more particularly to dielectric filter, transceiver and base station.
In present mobile communication technology, dielectric filter has become essential important component, is widely used in various mobile communication system, for filtering out clutter or interference signal outside communication signal frequency.
As metal filter, the highly selective needs of Yao Shixian dielectric filter form cross-coupling in dielectric filter.Cross-coupling is divided into capacitive coupling and inductive coupled two kinds of forms, and capacitive coupling is the low side formation transmission zero in dielectric filter response, to form the highly selective of dielectric filter low side；Inductive coupled is the high-end formation transmission zero in dielectric filter response, to form high-end highly selective of dielectric filter.At present, in the common dielectric filter of industry, the transmission zero of dielectric filter is typically only capable to realize inductive coupled, realize that the capacitive coupling of dielectric filter then needs to cascade the additional additional structure of bridging PCB or jumper cable etc. outside medium, or facing cavity configuration and realize by another non-crossing coupling.These additional structures all bring inconvenience for the processing of dielectric filter, assembly and debugging.
In addition, increasingly developed with wireless communication technique, it is desirable that the volume of base station minimizes.Volume shared by dielectric filter in a base station is also required to minimize, and it is existing can be achieved capacitively coupled dielectric filter due to need outside medium cascade accessory structure be just able to achieve, cause existing dielectric filter to be unable to satisfy the requirement that existing communication technology minimizes base station.
Summary of the invention
The embodiment of the present invention provides a kind of dielectric filter, solve the problems, such as it is existing can be achieved capacitively coupled dielectric filter account for it is bulky.
In a first aspect, embodiments herein provides a kind of dielectric filter, and it include ontology, at least three
A resonant cavity, each resonant cavity include a debugging hole, and debugging hole is located on ontology, and the ontology of each debugging hole and surrounding forms single resonant cavity；It two-by-two further include having blind hole between non-conterminous resonant cavity, blind hole is not attached to debugging hole, and blind hole is for realizing cross-coupling.Conductive layer is also attached on the body surface of resonant cavity.
In a kind of possible design, the depth of blind hole and the transmission zero of dielectric filter are related.
In a kind of possible design, different blind hole depths can determine that the cross-linked polarity of dielectric filter, cross-linked polarity include inductive coupled or capacitive coupling.
In a kind of possible design, different blind hole depths can determine the cross-linked different degrees of of dielectric filter.
In a kind of possible design, blind hole depth is related to cross-linked polarity, and from shallow to deep, cross-linked polarity can become capacitive coupling from inductive coupled accordingly to blind hole depth.
In a kind of possible design, the shape of blind hole includes any one as described below: cylindric, channel-shaped, strip are poroid.
In a kind of possible design, the width of blind hole is related to transmission zero.Specifically, blind hole width is bigger, transmission zero relative position is smaller, and the relative position of the transmission zero is greater than 1 relative to the center frequency point position of dielectric filter.
In a kind of possible design, the different depth in debugging hole may be used to determine the different resonance frequencies of the corresponding resonant cavity in debugging hole, each debugging hole can have respectively different depth, so that resonance frequency independent can be arranged according to concrete scene in the corresponding resonant cavity in each debugging hole, each resonance frequency can also be identical.
On the other hand, the embodiment of the present invention provides a kind of transceiver, including various possible dielectric filters as described above.
On the other hand, the embodiment of the present invention also provides a kind of base station, including transceiver as described above.
Dielectric filter, transceiver and the base station that the embodiment of invention provides simplify manufacturing process, so that the structure of dielectric filter more minimizes by internal new constitution realization capacitive coupling.
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, the drawings to be used in the description of the embodiments or prior art will be briefly described below.
Fig. 1 is a kind of perspective view of the structure of dielectric filter provided in an embodiment of the present invention；
Fig. 2 is a kind of top view of the structure of dielectric filter provided in an embodiment of the present invention；
Fig. 3 is a kind of bottom view of the structure of dielectric filter provided in an embodiment of the present invention；
Fig. 4 is a kind of inductive coupled analogous diagram of the realization of dielectric filter provided in an embodiment of the present invention；
Fig. 5 is a kind of capacitively coupled analogous diagram of the realization of dielectric filter provided in an embodiment of the present invention；
Fig. 6 is a kind of perspective view of the structure of dielectric filter provided in an embodiment of the present invention；
Fig. 7 is a kind of perspective view of the structure of dielectric filter provided in an embodiment of the present invention.
Below in conjunction with attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art's every other embodiment obtained under that premise of not paying creative labor, shall fall within the protection scope of the present invention.
The structure and application scenarios of description of the embodiment of the present invention are the technical solutions in order to more clearly illustrate the embodiment of the present invention, the restriction for technical solution provided in an embodiment of the present invention is not constituted, known to those of ordinary skill in the art, with the development of communication technology, technical solution provided in an embodiment of the present invention is equally applicable for similar technical problem.
The existing dielectric filter mentioned in background technique there are aiming at the problem that, it is the embodiment of the invention provides a kind of dielectric filter, creative to propose a kind of new structure, without that can realize capacitive coupling by cascading additional structure outside medium.Lower mask body combination attached drawing, is described in detail the embodiment of the present invention.It should be noted that attached drawing provided in an embodiment of the present invention is to be not intended to limit the scope of protection of the present invention to the schematical description of one kind of the embodiment of the present invention.
As shown in Figure 1, the dielectric filter includes at least three resonant cavities, the embodiment of the present invention is illustrated for including the dielectric filter of four resonant cavities.The main structure of the dielectric resonator includes ontology (1), 4 debugging holes (11 are respectively arranged on four angles of the ontology (1), 12,13 and 14), through-hole (101 and 102) are additionally provided between adjacent debugging hole.Through-hole runs through the upper and lower surface of ontology (1).In the present embodiment, through-hole (101 and 102) is all designed to a channel-shaped, and bending two ends are respectively facing between two adjacent debugging holes.By taking through-hole (101) as an example, through-hole (101) is a channel-shaped, the upper and lower surfaces of its depth penetration ontology (1), one end (1011) of its channel-shaped is bent towards between debugging hole (11) and debugging hole (12), and the other end is bent towards between debugging hole (11) and debugging hole (14).Through-hole (101) will debug hole (11) keeps apart with other debugging hole (such as 12 and 14), to form a resonant cavity around debugging hole (11).Similarly, through-hole (101) respectively keeps apart 4 debugging holes with through-hole (102), to be respectively formed single resonant cavity around each debugging hole.Dielectric resonator shown in FIG. 1 includes 4 resonant cavities as a result,.The upper surface of ontology (1) is run through in the one end in each debugging hole, the other end gos deep into ontology (1), form recess, its depth, which can according to need, is designed manufacture, being set as different depth by each debugging hole can make the resonant cavity constituted form different resonance frequencies, each debugging Kong Junke is set as different depth according to concrete application scene, wherein can be set to identical depth, may be set to be different depth.
As shown in Figure 1, around debugging hole (12) formed resonant cavity with around debugging hole (14) formation resonant cavity it is non-conterminous.For the two non-conterminous resonant cavities, it is arranged blind hole (100), position is as shown in fig. 1, and blind hole (100) is set between debugging hole (12) and debugging hole (14).Blind hole (100) in the present embodiment is designed to a channel-shaped, and the upper surface of ontology (1) is run through in the upper end of blind hole (100), and the lower end of blind hole can according to need setting depth.One end of blind hole (100) is close to the resonant cavity formed by debugging hole (12), and the other end is close to the resonant cavity formed by debugging hole (14).The both ends of blind hole (100) are all not communicated with debugging hole (12) and debugging hole (14).Blind hole (100) is not communicated with the through-hole (101 and 102) for being located at its both sides.
Through-hole in the embodiment of the present invention, the shape for debugging hole and blind hole can be rectangular, round, bar shaped, olive shape or other shapes in the plane, not limit in embodiments of the present invention.
Wherein, ontology (1) is generally made of solid dielectric material, preferably ceramic.Ceramics dielectric constant with higher, hardness and performance resistant to high temperature are also all preferable, therefore become the common solid dielectric material in dielectric filter field.Certainly, dielectric material can also select other materials known to those skilled in the art, such as the high molecular polymer of glass, electrical isolation.
In specific design and manufacture, can be shaped by integrated ontology (1) to obtain the ontology for having debugging hole, through-hole and blind hole, then surface metalation, such as electroplating surface are carried out to ontology, to obtain above-mentioned dielectric filter.In this way, the ontology of dielectric resonator included by the dielectric filter is continuous.Dielectric filter is obtained by the way of integral forming, its processing technology can be made simpler.
For the dielectric filter of more multi-cavity, as shown in fig. 7, the dielectric filter with more resonant cavity can also be constituted by cascading based on the fixed structure of three chambers (as shown in Figure 6) or four chambers.For the dielectric filter of more multi-cavity, blind hole is set between non-conterminous resonant cavity, to realize cross-coupling.The structural implementations of the dielectric filter of dielectric filter comprising three resonant cavities or more, with reference to above-described embodiment, details are not described herein again.
Blind hole (100) is related to the coupling of dielectric filter, by determining that the depth of blind hole (100) can determine the cross-coupling form of dielectric filter.The depth of blind hole refers to the blind hole depth internal from the upper surface of dielectric filter to dielectric filter ontology (1) herein.Depth by determining blind hole is ascending, and the cross-linked polarity of dielectric filter can be made to become capacitive coupling from inductive coupled.The depth of blind hole can also be set according to the needs of application scenarios, so that different degrees of variation occurs for cross-linked degree.
In specific design and manufacture, generally according to application scenarios it needs to be determined that being just fixed up after blind hole depth.Specifically, according to the cross-coupling characteristics to be realized of the dielectric filter, such as to realize inductive coupled respective degrees, it is fixed after determining the respective depth of blind hole；Correspondingly, can also be fixed after determining the respective depth of blind hole according to realize capacitively coupled respective degrees.By fixed implementation, quality is controllable during fabrication, and can guarantee that parameter will not deviate in subsequent use, and quality is more stable.In the implementation, the adjustable dielectric filter of blind hole depth can also be designed to meet the needs of the application scenarios of different parameters.
The depth of blind hole set according to practical application scene, such as the frequency of transmission zero, or realize inductive coupled or capacitively coupled degree, not limit herein.
The number that the blind hole (100) of two non-conterminous resonant cavities is connected shown in Fig. 1 is one, it but can also be designed to multiple, the zero point number that can transmit according to actual needs and/or frequency are come number, position and the specific depth size etc. that determine blind hole.
The width of blind hole (100) is related to transmission zero.Specifically, blind hole width is bigger, transmission zero relative position is smaller, and the relative position of the transmission zero is greater than 1 relative to the center frequency point position of dielectric filter.
Blind hole itself also has resonance frequency, the resonance frequency of blind hole is generally not involved in the resonance of filtering body passband, i.e. the resonance frequency of blind hole can be higher than the resonance frequency of filter passband, the resonance frequency of filter passband can also be lower than, when the resonance frequency of blind hole is higher than the frequency of dielectric filter passband, cross-coupling is shown as inductive coupled, and when the resonance frequency of blind hole is lower than the frequency of dielectric filter passband, cross-coupling is shown as capacitive coupling.The resonance frequency of blind hole can be determined by the depth of blind hole.With the increase of blind hole depth, the resonance frequency of blind hole is gradually reduced, and when frequency is reduced to low side from the passband of filter high-end, cross-coupling switches to capacitive coupling from inductive coupled.In the specific implementation, one include four resonant cavities dielectric filter, when blind hole depth be dielectric filter total height 2/5 when, cross-coupling be it is inductive coupled, transmission zero is on the right side of passband, as shown in Figure 4.When blind hole depth becomes the 3/5 of total height, cross-coupling is capacitive coupling, and transmission zero is in the left side of passband, as shown in Figure 5.
Conductive layer is adhered on the surface of dielectric resonator.Blind hole, through-hole and the sunk surface for debugging hole can also adhere to conductive layer.
In dielectric filter provided in an embodiment of the present invention, by connecting blind hole between non-conterminous resonant cavity, capacitive coupling can be realized inside dielectric resonator, without cascading external add-in structure, to realize the miniaturization of dielectric filter.Meanwhile capacitively coupled dielectric filter is realized relative to cascade external add-in structure, simplify the manufacturing process for realizing cross-linked structure.
Dielectric filter provided in an embodiment of the present invention is mainly used for high-power wireless communication base station radio-frequency front-end.
The embodiment of the invention also provides a kind of transceiver, above-described embodiment is used in the transceiver
Provided in dielectric filter.The dielectric filter can be used for being filtered radiofrequency signal.
The embodiment of the invention also provides a kind of base station, transceiver provided in above-described embodiment is used in the base station.
Above-described specific embodiment; the purpose of the present invention, technical scheme and beneficial effects are had been further described; it should be understood that; the foregoing is merely a specific embodiment of the invention; it is not intended to limit the scope of protection of the present invention; all any modification, equivalent substitution, improvement and etc. on the basis of technical solution of the present invention, done should all include within protection scope of the present invention.
Claims (11)
- A kind of dielectric filter, including ontology, which is characterized in that further include:At least three resonant cavities, each resonant cavity include debugging hole, and the debugging hole is located on the ontology, and the ontology of each debugging hole and surrounding forms single resonant cavity；It further include having blind hole between the resonant cavity non-conterminous two-by-two, the blind hole is not attached to the debugging hole, and the blind hole is for realizing cross-coupling.
- Dielectric filter according to claim 1, which is characterized in that the depth of the blind hole is related to the transmission zero of the dielectric filter.
- Dielectric filter according to claim 1 or 2, which is characterized in that the depth of the blind hole determines the cross-linked polarity of dielectric filter, and the cross-linked polarity includes inductive coupled or capacitive coupling.
- Dielectric filter according to claim 3, which is characterized in that the depth of the blind hole determines the cross-linked degree of the dielectric filter.
- Dielectric filter according to any one of claims 1 to 4, which is characterized in that the blind hole depth is related to cross-linked polarity, and from shallow to deep, cross-linked polarity becomes capacitive coupling from inductive coupled for the depth setting of the blind hole.
- Dielectric filter according to any one of claims 1 to 5, which is characterized in that the shape of the blind hole includes any one as described below: cylindric, channel-shaped, strip are poroid.
- Dielectric filter according to any one of claims 1 to 6, which is characterized in that the width of the blind hole is related to transmission zero.
- Dielectric filter according to claim 7, which is characterized in that the width and biography of the blind hole Defeated zero point is related, comprising:Blind hole width is bigger, and transmission zero relative position is smaller, and the relative position of the transmission zero is greater than 1 relative to the center frequency point position of dielectric filter.
- Dielectric filter according to any one of claims 1 to 8, which is characterized in that the depth in the debugging hole be used to determine the debugging hole corresponding resonant cavity resonance frequency.
- A kind of transceiver, which is characterized in that including dielectric filter according to any one of claims 1 to 9.
- A kind of base station, which is characterized in that including transceiver according to claim 10.
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| CN202110050984.4A CN112886161B (en) | 2015-11-27 | 2015-11-27 | Dielectric filter, transceiver and base station |
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| PCT/CN2015/095791 WO2017088174A1 (en) | 2015-11-27 | 2015-11-27 | Dielectric filter, transceiver and base station |
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| CN109461995A (en) * | 2018-12-27 | 2019-03-12 | 苏州艾福电子通讯有限公司 | A kind of waveguide filter using ceramic dielectric |
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| WO2022000620A1 (en) * | 2020-06-30 | 2022-01-06 | 瑞声声学科技(深圳)有限公司 | Capacitive coupling structure and dielectric waveguide filter |
| CN111816962A (en) * | 2020-08-11 | 2020-10-23 | 中国电子科技集团公司第二十六研究所 | Electromagnetic hybrid coupling structure of dielectric filter and communication equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112886161A (en) | 2021-06-01 |
| EP3319166A4 (en) | 2018-09-12 |
| WO2017088174A1 (en) | 2017-06-01 |
| EP3319166A1 (en) | 2018-05-09 |
| EP3319166B1 (en) | 2020-07-01 |
| JP2018526949A (en) | 2018-09-13 |
| JP6572391B2 (en) | 2019-09-11 |
| CN107534197B (en) | 2021-01-15 |
| CN112886161B (en) | 2022-03-29 |
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