CN107946704A - A kind of bimodulus dielectric filter - Google Patents
A kind of bimodulus dielectric filter Download PDFInfo
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- CN107946704A CN107946704A CN201711072319.5A CN201711072319A CN107946704A CN 107946704 A CN107946704 A CN 107946704A CN 201711072319 A CN201711072319 A CN 201711072319A CN 107946704 A CN107946704 A CN 107946704A
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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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- 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
- H01P1/2082—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with multimode resonators
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Abstract
The present invention relates to the electronic component in the communications field, more particularly, to a kind of bimodulus dielectric filter.The wave filter, including cavity and cover board, in two neighboring interior intracavitary, one of them interior intracavitary is equipped with the metal resonators that can produce a resonant frequency, another interior intracavitary is equipped with the dielectric resonator that can produce two resonant frequencies；The first coupling line is equipped between metal resonators and dielectric resonator, the second coupling line is equipped between dielectric resonator and dielectric resonator.Two degenerate mode resonant frequencies are produced by dielectric resonator, two chambers can be played the role of in wave filter, therefore under identical index, can significantly reduce size；Two degenerate mode resonant frequencies by medium block two adjacent side length independent controls, coupling amount between two degenerate modes is controlled by the length of corner cut size of medium block, can be by controlling the appearance and size of medium block, the electric parameter of accurate control wave filter, so as to ensure the uniformity of batch, debug time is reduced.
Description
Technical field
The present invention relates to the electronic component in the communications field, more particularly, to a kind of bimodulus dielectric filter.
Background technology
Requirement recently as the high-performance to communication equipment and miniaturization is increasing, and bimodulus dielectric filter is more next
More it is taken seriously.But bimodulus dielectric filter before uses cylindrical resonator more, and hole debugging is got through on the resonator.
The shortcomings that this scheme, is that needs punch on dielectric material, it is well known that ceramic material hardness is high, and does not have ductility,
Therefore through hole can not possibly accurately be processed by the method for cutting as metal in ceramic surface, realizes through hole at present,
It can only first punch, then carry out around knot on green compact before ceramic post sintering, but during sintering, since ceramics can be shunk, make
The lead to the hole site precision and diameter accuracy that must be eventually formed can not all ensure.So as to influence uniformity during batch production.
The content of the invention
To solve problem above, the present invention provides a kind of bimodulus dielectric filter, the bimodulus dielectric filter is simple in structure,
Processing and fabricating is convenient, and the electric parameter that wave filter design can be effectively ensured accurately is realized there is good uniformity.
The technical solution adopted by the present invention is：A kind of bimodulus dielectric filter, including the cavity with some inner cavities, cover
Cover board on cavity, and produce the metal resonators of a resonant frequency installed in the interior intracavitary and produce two degeneracys
The dielectric resonator of mould resonant frequency, it is characterised in that：The dielectric resonator is the medium block of a cuboid or square,
Described two degenerate mode resonant frequencies are independent by the first side of medium block adjacent orthogonal and the size of second side respectively
Control, is equipped with the first coupling line between the first side and metal resonators of the dielectric resonator, the dielectric resonator
The second coupling line is equipped between the dielectric resonator of second side and another adjacent interior intracavitary.
Preferably, described two degenerate mode resonant frequencies are big by first side top and the second side top length of side respectively
Small independent control.
Further, a seamed edge corner cut of the medium block, the seamed edge of the corner cut are located at first side and the second side
Intersect the offside of seamed edge in face, and the coupling amount between described two degenerate modes is cut away the volume size control of medium by the corner cut of medium block
System.
Further, it with corresponding edge is in 45 degree of constant angles that the direction of the corner cut, which is, between described two degenerate modes
Coupling amount is controlled by edge lengths in the corner cut of medium block.
Further, four inner cavities are equipped with the cavity, intracavitary is equipped with one resonant frequency of generation in two of which
Metal resonators, two other interior intracavitary be equipped with produce two degenerate mode resonant frequencies dielectric resonator.
Further, described first coupling line one end and the card edge of metal resonators connect, the other end and cover board
Connection；The position of the first coupling line and adjacent media resonator is controlled, adjusts cross-linked size and polarity.
Further, the second coupling line both ends are connected with cover board, the second coupling line of control and adjacent media resonance
The position of device, adjusts cross-linked size and polarity.
Further, first coupling line and the second coupling line are the U-shaped bending metal wire of opening upwards, described the
The bottom of one coupling line and the second coupling line is equipped with convex block, and bottom is equipped with the coupling line pedestal to insulate in the cavity, described
Coupling line pedestal is equipped with the groove coordinated with convex block, determines the cooperation position of groove and convex block, determines coupling line and adjacent Jie
The position of matter resonator.
Further, the card of the metal resonators be equipped with input tap structure, the tap structure include by
Upper plastic spacer, tap piece and the lower plastic spacer being successively set under between the card of metal resonators and cavity, institute
Plastic spacer, tap piece and lower plastic spacer is stated to be fixed between the card of metal resonators and cavity by plastic screw.
Further, the coupled structure between the metal resonators and dielectric resonator, and dielectric resonator and Jie
Coupled structure between matter resonator, and the tap structure of input, one-piece parts are formed by Shooting Technique.
A kind of bimodulus dielectric filter, including the cavity with some inner cavities, the cover board covered on cavity, and installation
Metal resonators and dielectric resonator in the inner cavity, it is characterised in that：The dielectric resonator is arranged to square, definition
The dielectric resonator and the relevant one side of the metal resonators are the first side, define phase between two dielectric resonators
One side of pass is the second side, and the first coupling line traffic control resonant frequency between the two is equipped between the metal resonators and the first side
Coupling amount, the coupling of the second coupling line traffic control resonant frequency between the two is equipped between the second side of two dielectric resonators
Resultant.
Preferably, on the dielectric resonator with first while and second while opposite both sides be defined as the 3rd side and the 4th
Side, the 3rd while and the angle that connects and composes of the 4th while be arranged to corner cut, between the length control the 3rd of the corner cut is at the 4th
The coupling amount of resonant frequency.
The beneficial effect that the present invention obtains is：Two degenerate mode resonant frequencies are produced by dielectric resonator, in wave filter
In can play the role of two chambers, therefore under identical index, which can significantly reduce size；Two
A degenerate mode resonant frequency is by two adjacent side length independent controls of medium block, and the coupling amount between two degenerate modes is by being situated between
The length of corner cut size control of mass, during making, can pass through the appearance and size for controlling medium block, the accurate electricity for controlling wave filter
Gas parameter, so as to ensure the uniformity of batch, reduces debug time, improves production efficiency；Metal resonators and dielectric resonator
Between coupled structure, and the coupled structure between dielectric resonator and dielectric resonator, and input tap structure passes through note
Mould technique and form one-piece parts, reduce installation time, the production cycle is shorter.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is metal resonators and dielectric resonator coupled structure schematic diagram；
Fig. 3 is a kind of electric parameter principle schematic of embodiment of the present invention；
Fig. 4 is the schematic diagram of the electric parameter and the correspondence of locations of structures shape of a kind of embodiment of the present invention；
Fig. 5 is the length of side and resonant frequency correspondence figure of dielectric resonator；
Fig. 6 is the corner cut and coefficient of coup correspondence figure of dielectric resonator；
Fig. 7 is a kind of measured curve schematic diagram of embodiment of the present invention.
Embodiment
The present invention is further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of bimodulus dielectric filter of the present invention, including cavity 1 and cover board 2, cover board 2 are covered in cavity
On 1, it is fixedly connected using the mode such as welding or crimping.Several inner cavities 11 are equipped with cavity 1, in two neighboring inner cavity 11
It is interior, the metal resonators 3 that can produce a resonant frequency are equipped with one of inner cavity 11, being equipped with another inner cavity 11 to produce
The dielectric resonator 4 of raw two resonant frequencies, metal resonators 3 and dielectric resonator 4 do not contact with corresponding 11 wall of inner cavity,
And upper surface using welding or the mode such as crimps and is fixed together with 2 lower surface of cover board.Cover board 2 is equipped with some tunings
Screw rod 21.
In one embodiment, dielectric resonator 4 is the medium block of a cuboid or square, two degenerate mode resonance
Frequency is respectively by the orthogonal first side of medium block and the size independent control of second side, and the first of dielectric resonator 4
Be equipped with the first coupling line 5 between side and metal resonators 3, the second side of dielectric resonator 4 with another adjacent inner cavity 11
Dielectric resonator 4 between be equipped with the second coupling line 6.In the present embodiment, by varying first side top and second side
The side length of top changes the area of first side and second side, i.e., two degenerate mode resonant frequencies are respectively by the first side
Face top and second side top length of side size independent control.Medium block a seamed edge corner cut (i.e. along the seamed edge by up to
Sagging vertical cut falls a medium block part), the seamed edge of corner cut is located at first side and second side intersects the offside of seamed edge, two letters
And the coupling amount between mould is controlled by the length of corner cut size of the medium block of dielectric resonator 4.
With reference to shown in Fig. 4, dielectric resonator 4 uses cuboid medium block, and a side of medium block has corner cut C, controls
The adjacent edge of two degenerate mode resonant frequencies is respectively A and B, and corner cut C and adjacent edge A and B are in offside, between two degenerate modes
Coupling amount determined by the volume of the corner cut C of the medium block medium blocks cut away, in the present embodiment corner cut direction be and the corresponding length of side
In 45 degree of constant angles, then the coupling amount between two degenerate modes is by the corner cut C tops side length size control of medium block, corner cut
(coupling amount between two degenerate modes of medium block becomes relation between C sizes and coupling amount with corner cut size as shown in Figure 6
The relation curve of change), corner cut C is bigger, and coupling amount is bigger, and vice versa；Two degenerate mode resonant frequencies by medium block two phases
Adjacent side length independent control, the relation of the adjacent length of side and resonant frequency is as shown in Figure 5 (for two degenerate mode resonance of medium block
The relation curve that frequency changes with wherein a line), the length of side is longer, and corresponding resonant frequency is lower, and vice versa.
With reference to shown in Fig. 2,5 one end of the first coupling line is connected with the card edge of metal resonators 3, the other end and cover board 2
Connection, by the position relationship of the first coupling line of control 5 and adjacent media resonator 4, adjusts cross-linked size and polarity；
Second coupling line, 6 both ends are connected with cover board 2, by controlling the position relationship of the second coupling line 6 and adjacent media resonator 4,
Adjust cross-linked size and polarity.
In the present embodiment, the first coupling line 5 and the second coupling line 6 are the U-shaped bending metal wire of opening upwards, this
U-shaped bending metal wire coupling line can accurately be processed by way of wire cutting, it is ensured that with good consistent during batch production
Property.The bottom of first coupling line 5 and the second coupling line 6 is equipped with convex block 51, and bottom is equipped with the coupling line pedestal to insulate in cavity 1
8, coupling line pedestal 8 is equipped with the groove 81 coordinated with convex block 51, by determining the cooperation position of groove 81 and convex block 51, into one
Step determines the placement position of coupling line, so that it is determined that the position relationship of coupling line and adjacent media resonator, ensures that wave filter is set
The electric parameter of meter is accurately realized, so that it is guaranteed that with good uniformity during batch production.
The card of metal resonators 3 is equipped with the tap structure 7 of input, and tap structure 7 includes from top to bottom setting gradually
Upper plastic spacer 72, tap piece 73 and lower plastic spacer 74 between the card of metal resonators 3 and cavity 1, upper plastic mattress
Piece 72, tap piece 73 and lower plastic spacer 74 are fixed between the card of metal resonators 3 and cavity 1 by plastic screw 71.
The coupling amount of input tap structure 7 is mainly determined that thickness is thinner by the thickness of upper plastic spacer 72,3 card of metal resonators
Lower surface and the distance of tap piece 73 it is nearer, electric field is more sufficient, coupling amount it is bigger, it can be achieved that filter bandwidht it is wider, it is on the contrary
It is as the same.The shortcomings that uniformity is poor when the tap structure 7 avoids human weld's tap.
In one embodiment, the coupled structure between metal resonators 3 and dielectric resonator 4, and dielectric resonator 4 with
Coupled structure between dielectric resonator 4, and the tap structure 7 of input, are processed into single one by Shooting Technique
Part, simplifies assembling process, improves production efficiency.
In one embodiment, as shown in Figure 3-4, four inner cavities 11 are equipped with cavity 1, are equipped with two of which inner cavity 11
The metal resonators 3 of a resonant frequency (f0 or f5) can be produced, two degenerate modes can be produced by being equipped with two other inner cavity 11
The dielectric resonator 4 of resonant frequency (f1 and f2 or f3 and f4), the medium block contour structures of dielectric resonator 4 are with one
The rectangular parallelepiped structure of corner cut C.The resonant frequency and relation such as Fig. 3 institutes of coupling amount that the bimodulus dielectric filter of the present embodiment uses
Show, f0, f5 are the resonant frequency of two metal resonators 3 of head and the tail, and f1, f2 are two degeneracys of one of dielectric resonator 4
Mould resonant frequency, f3, f4 are two degenerate mode resonant frequencies of another dielectric resonator 4.K01、K12、K23、K34、
K45, represents the coupling amount between different resonant frequencies, wherein K02, K24 is cross-couplings amount.As shown in fig. 7, in the present embodiment
In, K02 is be located at passband the right (it is high-end that the frequency i.e. corresponding to transmission zero is located at passband) on the occasion of, corresponding transmission zero,
K24 is negative value, and corresponding transmission zero is located at the passband left side (frequency corresponding to transmission zero is located at passband low side).
In the present embodiment, although being provided only with four inner cavities 11, two wire chambers and two dielectric cavities in cavity 1, each
Dielectric cavity can produce two degenerate mode resonant frequencies, i.e. the present embodiment can realize six traditional chamber, two transmission zeros filters
The function of ripple device, as shown in fig. 7, j1 is transmission zero caused by k24, j2 is transmission zero caused by k02, h1, h2,
The resonance peak that h3, h4, h5, h6 f1, f2, f3, f4, f5, f6 are produced after intercoupling.Compared to conventional filter, phase is being realized
In the case of congenerous, the overall volume of wave filter can be greatly reduced, and cost of manufacture is lower.
In the present embodiment, accurate plane is done by the appearance and size (A, B, C) of the dielectric resonator 4 of cube structure and is added
Work, can accurately control each electric parameter of wave filter, so as to ensure the uniformity of batch, reduce debug time, improve
Production efficiency.
As shown in figure 4, the coupling between metal resonators 3 and dielectric resonator 4, is realized by the first coupling line 5.If the
The tie point that one coupling line 5 is connected with cover board 2 is located on the center vertical line of adjacent edge, then the first coupling line 5 only realizes that metal is humorous
The coupling K01 to shake between the resonant frequency f0 and the one of resonant frequency f1 of dielectric resonator of device 3.Otherwise the first coupling line 5,
In addition to K01, cross-couplings K02 can be also formed between another resonant frequency f2, produces transmission zero.With metal resonators
3 and the center vertical line of 4 adjacent edge of dielectric resonator be directed toward media interior as x-axis, if tie point is located in x-axis (D1 in figure
Put), then cross-couplings K02 is not produced, does not produce transmission zero；If tie point is located at x-axis Left half-plane (D2 positions in figure),
Cross-couplings K02 is on the occasion of it is high-end that the frequency corresponding to its transmission zero produced is located at passband；If tie point is located at the x-axis right side
Half-plane (D3 positions in figure), then cross-couplings K02 is negative value, and it is low that the frequency corresponding to its transmission zero produced is located at passband
End.
As shown in figure 4, the coupling between dielectric resonator 4 and dielectric resonator 4, is realized by the second coupling line 6.Its coupling
It is similar with the coupled characteristic between above-mentioned metal resonators and dielectric resonator to close characteristic, for convenience of description, by wherein one end
Tie point is positioned on the center vertical line of adjacent edge, and other end tie point is discussed when being located at diverse location, the coupling amount formed.
Media interior is directed toward as y-axis using the center vertical line of dielectric resonator 4 and 4 adjacent edge of dielectric resonator, by other end tie point
Position plane be divided into Left half-plane and right half plane,
If tie point is located in y-axis (E1 positions in figure), cross-couplings K24 is not produced, does not produce transmission zero；If even
Contact is located at y-axis Left half-plane (E2 positions in figure), then cross-couplings K24 is negative value, corresponding to its transmission zero produced
Frequency is located at passband low side；If tie point is located at y-axis right half plane (E3 positions in figure), cross-couplings K24 is on the occasion of it is produced
It is high-end that frequency corresponding to raw transmission zero is located at passband.
Basic principle, main feature and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (10)
1. a kind of bimodulus dielectric filter, including the cavity (1) with some inner cavities (11), the cover board covered on cavity (1)
(2), metal resonators (3) and two degenerate modes of generation for and in the inner cavity (11) producing a resonant frequency are humorous
The dielectric resonator (4) of vibration frequency, it is characterised in that：The dielectric resonator (4) is a cuboid or the medium of square
Block, described two degenerate mode resonant frequencies are only by the first side of medium block adjacent orthogonal and the size of second side respectively
Vertical control, is equipped with the first coupling line (5), is given an account of between the first side and metal resonators (3) of the dielectric resonator (4)
The second coupling line is equipped between dielectric resonator (4) in the second side of matter resonator (4) and another adjacent inner cavity (11)
(6)。
2. bimodulus dielectric filter according to claim 1, it is characterised in that：Described two degenerate mode resonant frequency difference
By first side top and second side top length of side size independent control.
3. bimodulus dielectric filter according to claim 1 or 2, it is characterised in that：One seamed edge of the medium block is cut
Angle, the seamed edge of the corner cut is located at first side and second side intersects the offside of seamed edge, the coupling between described two degenerate modes
The volume size that resultant is cut away medium by the corner cut of medium block controls.
4. bimodulus dielectric filter according to claim 3, it is characterised in that：The direction of the corner cut is to be in corresponding edge
45 degree of constant angles, the coupling amount between described two degenerate modes are controlled by edge lengths in the corner cut of medium block.
5. bimodulus dielectric filter according to claim 3, it is characterised in that：Four inner cavities are equipped with the cavity (1)
(11), the metal resonators (3) for producing a resonant frequency are equipped with two of which inner cavity (11), two other interior intracavitary is equipped with
Produce the dielectric resonator (4) of two degenerate mode resonant frequencies.
6. bimodulus dielectric filter according to claim 5, it is characterised in that：Described first coupling line (5) one end and gold
Belong to the card edge connection of resonator (3), the other end is connected with cover board (2)；Control the first coupling line (5) and adjacent media resonance
The position of device (4), adjusts cross-linked size and polarity；Second coupling line (6) both ends are connected with cover board (2), control
The position of second coupling line (6) and adjacent media resonator (4), adjusts cross-linked size and polarity.
7. bimodulus dielectric filter according to claim 6, it is characterised in that：First coupling line (5) and the second coupling
Zygonema (6) is the U-shaped bending metal wire of opening upwards, and the bottom of first coupling line (5) and the second coupling line (6) is equipped with
Convex block (51), the interior bottom of the cavity (1) be equipped with insulation coupling line pedestal (8), the coupling line pedestal (8) be equipped with it is convex
The groove (81) that block (51) coordinates, determines the cooperation position of groove (81) and convex block (51), determines that coupling line is humorous with adjacent media
Shake the positions of device (4).
8. bimodulus dielectric filter according to claim 3, it is characterised in that：In the card of the metal resonators (3)
Tap structure (7) equipped with input, the tap structure (7) include from top to bottom being successively set on the disk of metal resonators (3)
Upper plastic spacer (72), tap piece (73) and lower plastic spacer (74) between face and cavity (1), the upper plastic spacer
(72), tap piece (73) and lower plastic spacer (74) are fixed on the card and chamber of metal resonators (3) by plastic screw (71)
Between body (1).
9. a kind of bimodulus dielectric filter, including the cavity (1) with some inner cavities (11), the cover board covered on cavity (1)
And metal resonators (3) and dielectric resonator (4) installed in the inner cavity (11) (2), it is characterised in that：The medium
Resonator (4) is arranged to square, defines the dielectric resonator (4) and the metal resonators (3) relevant one side as the
On one side, relevant one side is the second side between defining two dielectric resonators (4), the metal resonators (3) and first
It is equipped with the coupling amount of the first coupling line (5) control resonant frequency between the two between side, the of two dielectric resonators (4)
The coupling amount that the second coupling line (6) controls resonant frequency between the two is equipped between two sides.
10. bimodulus dielectric filter according to claim 9, it is characterised in that：With first on the dielectric resonator (4)
While with second opposite both sides be defined as the 3rd while and when the 4th, the 3rd while and the angle that connects and composes of the 4th while be arranged to cut
Angle, the corner cut length control the 3rd at the 4th between resonant frequency coupling amount.
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| CN110534858A (en) * | 2019-07-26 | 2019-12-03 | 苏州诺泰信通讯有限公司 | A kind of changeover mechanism of filter |
| WO2020062687A1 (en) * | 2018-09-30 | 2020-04-02 | 香港凡谷发展有限公司 | Outwardly protruding triple-mode cavity resonance structure and filter containing same |
| CN113745780A (en) * | 2020-05-29 | 2021-12-03 | 华为技术有限公司 | Cavity filter and communication equipment |
| WO2023142706A1 (en) * | 2022-01-29 | 2023-08-03 | 普罗斯通信技术（苏州）有限公司 | Metal injection-molded filter and manufacturing method |
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| CN110534858B (en) * | 2019-07-26 | 2024-06-04 | 苏州诺泰信通讯有限公司 | Switching mechanism of filter |
| CN113745780A (en) * | 2020-05-29 | 2021-12-03 | 华为技术有限公司 | Cavity filter and communication equipment |
| WO2023142706A1 (en) * | 2022-01-29 | 2023-08-03 | 普罗斯通信技术（苏州）有限公司 | Metal injection-molded filter and manufacturing method |
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| CN107946704B (en) | 2019-11-29 |
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