CN109301407A - Lamination sheet type bandpass filter - Google Patents
Lamination sheet type bandpass filter Download PDFInfo
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- CN109301407A CN109301407A CN201811231219.7A CN201811231219A CN109301407A CN 109301407 A CN109301407 A CN 109301407A CN 201811231219 A CN201811231219 A CN 201811231219A CN 109301407 A CN109301407 A CN 109301407A
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- bandpass filter
- strip line
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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
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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
- H01P1/203—Strip line filters
- H01P1/20327—Electromagnetic interstage coupling
- H01P1/20336—Comb or interdigital filters
- H01P1/20345—Multilayer filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/08—Strip line resonators
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Abstract
The present invention provides a kind of lamination sheet type bandpass filter, including ceramic matrix, six rank resonators, each resonator is triple layer belt shape line resonator；In six rank resonators: the first rank, third rank and the 5th rank stripline resonator are located at lower plane, and second-order, fourth order and the 6th rank stripline resonator are located at upper plane；Lamination sheet type bandpass filter further includes that second-order and fourth order stripline resonator are carried out cross-linked Z-type coupling line.For the present invention by six rank triple layer belt shape line resonators of setting, the triple layer belt shape line of each resonator forms two additional plate loading capacitances, so that resonator length is much smaller than 1/4 wavelength；Six rank resonators are set in two planes of different height, to utilize longitudinal space, while guaranteeing identical coupling amount, shorten horizontal spacing so that this lamination sheet type bandpass filter integrated level is higher, small in size, pass band insertion loss is small, stopband inhibits high, high reliablity.
Description
Technical field
The invention belongs to filter fields, are to be related to a kind of lamination sheet type bandpass filter more specifically.
Background technique
Device of the bandpass filter as important signal frequency-selecting, filtering interference, in the microwave and millimeter waves such as communication, radar system
The signal transmission quality of whole system is directly affected in system.As electronic system is to high frequency, high integration and high-performance side
To continuous development, the miniaturization of filter becomes the hot spot of academia and industry research.Using Planar integration technology (as printed
Circuit board (PCB) and integrated passive devices (IPD)) and stack technology (such as low-temperature co-fired ceramics (LTCC)), it can greatly reduce
Filter volume.The former high-frequency loss is big, the quality factor (Q value) of filter are low, limits it to a certain degree in high frequency and high property
Application under energy occasion；The latter integrates advantage and outstanding material property with its three-dimensional (3D), in multi-chip module and microwave milli
It is applied widely in metric wave system.
The lamination sheet type structure of multilayer stripline resonator is simple with its structure, design freedom is high, processing is relatively easy
The advantages that by favor.Current lamination sheet type bandpass filter is usually that multilayer stripline resonator is arranged in same level
On, i.e., it is so-called " coplanar integrated ".The structure uses multilayer stripline, loading capacitance is increased, thus with shorter strip line
1/4 wave resonator is realized, filter size is greatly reduced.
However, causing since the coupling between resonator is mainly determined by its space length using coplanar integration mode system
About the miniaturising of lamination sheet type bandpass filter.
Summary of the invention
The purpose of the present invention is to provide a kind of lamination sheet type bandpass filters, to solve lamination existing in the prior art
The larger problem of chip bandpass filter volume.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of lamination sheet type bandpass filter is provided, including
Ceramic matrix, six rank resonators being set in the ceramic matrix, the input terminal for being respectively arranged on the ceramic matrix both ends and
Output end, each resonator are extended along the ceramic matrix width direction, and each resonator is triple layer belt shape line
Resonator；Resonator described in six ranks include the first rank stripline resonator set gradually along the ceramic matrix length direction,
Second-order stripline resonator, third rank stripline resonator, fourth order stripline resonator, the 5th rank stripline resonator and
6th rank stripline resonator, and the first rank stripline resonator, the third rank stripline resonator and the described 5th
Rank stripline resonator is located at lower plane, the second-order stripline resonator, the fourth order stripline resonator and described
6th rank stripline resonator is located at upper plane, and the lower plane is in the upper plane along the ceramic matrix short transverse
Lower section, the first rank stripline resonator connect the input terminal, and the 6th rank stripline resonator connects the output
End；The lamination sheet type bandpass filter further includes by the second-order stripline resonator and the fourth order strip line resonance
Device carries out the cross-linked Z-type coupling line, and the Z-type coupling line includes being extended along the ceramic matrix width direction
Second segment and first segment and along the ceramic matrix length direction be extended third section, the second segment and described first
Section is connected with the both ends of the third section respectively, and the second segment and the first segment are located at the two sides of the third section,
The second segment is located at the top of the second-order stripline resonator, and the first segment is located at the fourth order strip line resonance
The top of device.
Further, the interlayer spacing of the triple layer belt shape line of each resonator is identical, and strip line and bottom described in top layer
Layer strip line strip line mirror symmetry described in middle layer is arranged, one end ground connection of strip line described in middle layer, intermediate
The other end of the layer strip line is hanging, and strip line described in top layer is hanging close to one end of the ground connection of the middle layer strip line,
The other end of strip line described in top layer is grounded, and strip line described in bottom is outstanding close to one end of the ground connection of the middle layer strip line
Sky, the other end ground connection of strip line described in bottom.
Further, each resonator further includes protrusion band corresponding with the free end of each layer strip line respectively,
The protrusion band is arranged with the corresponding free end interval, and each protrusion band is grounded.
Further, the lamination sheet type bandpass filter further includes the left and right sides for being respectively arranged on the ceramic matrix
Two counterpoise groundings, each counterpoise grounding are connected with the neighbouring protrusion band, and the ground terminal of each strip line connects with adjacent to described
Area is connected.
Further, the lamination sheet type bandpass filter further includes the upper earth plate set on the upside of the ceramic matrix
With the lower earth plate for the downside for being set to the ceramic matrix, the distance and the upper plane of the lower plane to the lower earth plate
Distance to the upper earth plate is roughly equal.
Further, the edge of the upper earth plate two sides offers the upper notch for being used to form areas of dielectric, institute respectively
The edge for stating lower earth plate two sides offers the lower notch for being used to form areas of dielectric respectively.
Further, the first rank stripline resonator and the input terminal interval are arranged, the 6th rank strip line
Resonator and the output end interval are arranged, and the lamination sheet type bandpass filter further includes by the first rank strip line resonance
The first tap that device is connect with the input terminal and the 6th rank stripline resonator is connect with the output end second
Tap.
Further, the width of first tap and the input terminal connecting place is by the input terminal to far from the input terminal
Direction be in gradually-reducing shape；The width of second tap and the output end connecting place is by the output end to the separate output end
Direction is in gradually-reducing shape.
Further, first tap is single layer folded strip line, and second tap is single layer folded strip line.
Further, the length of each resonator is different.
The beneficial effect of lamination sheet type bandpass filter provided by the invention is: compared with prior art, the present invention is logical
Six rank triple layer belt shape line resonators of setting are crossed, so that the triple layer belt shape line of each resonator, which forms two additional plates, loads electricity
Hold, so that resonator length is much smaller than 1/4 wavelength；Six rank resonators are set in two planes of different height, with abundant
Using longitudinal space, while guaranteeing identical coupling amount, shorten horizontal spacing, so that the lamination sheet type bandpass filter has
The features such as integrated level is higher, small in size, pass band insertion loss is small, stopband inhibits height, high reliablity；And use low temperature co-fired pottery
When porcelain technology is processed, processing technology is simple, cost is relatively low.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the volume rendering structural schematic diagram of lamination sheet type bandpass filter provided in an embodiment of the present invention；
Fig. 2 is the overlooking structure diagram of lamination sheet type bandpass filter provided in an embodiment of the present invention；
Fig. 3 is the positive structure diagram of lamination sheet type bandpass filter provided in an embodiment of the present invention；
Fig. 4 is the equivalent circuit structure schematic diagram of lamination sheet type bandpass filter provided in an embodiment of the present invention；
Fig. 5 is the simulation result schematic diagram of lamination sheet type bandpass filter used by the embodiment of the present invention.
Wherein, each attached drawing main mark in figure:
11- ceramic matrix；12- input terminal；13- output end；14- counterpoise grounding；20- resonator；21- the first rank strip line is humorous
Shake device；22- second-order stripline resonator；23- third rank stripline resonator；24- fourth order stripline resonator；25-
Five rank stripline resonators；The 6th rank stripline resonator of 26-；200- strip line；201- middle layer strip line；202- top layer band
Shape line；203- bottom strip line；204- protrudes band；31-Z type coupling line；311- first segment；312- second segment；313- third section；
Earth plate under 32-；Notch under 321-；The upper earth plate of 33-；The upper notch of 331-；The first tap of 34-；The second tap of 35-；It is put down on 41-
Face；42- lower plane.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or indirectly on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined." several " are meant that one or more, unless otherwise specifically defined.
In the description of the present invention, it is to be understood that, term " center ", " length ", " width ", " thickness ", "upper",
The orientation or position of the instructions such as "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside"
Relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, without referring to
Show or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot manage
Solution is limitation of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside two elements.It for the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term in the present invention is understood as the case may be.
For the convenience of description, orthogonal three reference axis are respectively X-axis, Y-axis and Z axis on definition space, wherein X-axis
It is orthogonal two reference axis of same level with Y-axis, Z axis is the reference axis of vertical direction；X-axis, Y-axis and Z axis are located at
Space is mutually perpendicular to there are three plane be respectively the face XY, the face YZ and the face XZ, and defines the length of the lamination sheet type bandpass filter
Degree direction is X-axis, and width direction is Y-axis, and short transverse is Z axis；And defining left and right directions is to be parallel to Y direction, upper and lower
To be parallel to Z-direction.
Also referring to Fig. 1 to Fig. 3, now lamination sheet type bandpass filter provided by the invention is illustrated.It is described folded
Synusia formula bandpass filter, including ceramic matrix 11, six rank resonators 20, input terminal 12, output end 13 and Z-type coupling line 31；
Input terminal 12 and output end 13 are respectively arranged on 11 both ends of ceramic matrix, and six rank resonators 20 and Z-type coupling line 31 are all set in pottery
In porcelain basal body 11；Each resonator 20 is extended along 11 width direction of ceramic matrix, and each resonator 20 is that triple layer belt shape line is humorous
Shake device, so that the triple layer belt shape line 200 of each resonator 20 forms two additional plate loading capacitances, so that 20 length of resonator
Much smaller than 1/4 wavelength, so the lamination sheet type bandpass filter can be made to may operate in C-band (working frequency is in 4-8GHz
Frequency band).Six rank resonators 20 are band-like including the first rank stripline resonator 21, second-order stripline resonator 22, third rank
Line resonator 23, fourth order stripline resonator, the 5th rank stripline resonator and the 6th rank stripline resonator；First rank band
Shape line resonator 21, second-order stripline resonator 22, third rank stripline resonator 23, fourth order stripline resonator 24,
5th rank stripline resonator 25 and the 6th rank stripline resonator 26 are set gradually along 11 length direction of ceramic matrix, and first
Rank stripline resonator 21 connects input terminal 12, and the 6th rank stripline resonator 26 connects output end 13；First rank strip line is humorous
Vibration device 21, third rank stripline resonator 23 and the 5th rank stripline resonator 25 are located at lower plane 42, and second-order strip line is humorous
Vibration device 22, fourth order stripline resonator 24 and the 6th rank stripline resonator 26 are located at upper plane 41, and lower plane 42 is along ceramics
11 short transverse of matrix is in the lower section of upper plane 41, to make full use of the space of longitudinal direction (11 short transverse of ceramic matrix), into
And shorten horizontal spacing, integrated level is improved, volume is reduced, and the width and adjacent two resonance of each resonator 20 can also be passed through
The distance between device 20 closes on coupling to control, and closes on coupling by broadside coupled realization between resonator 20.Z-type coupling line 31
For second-order stripline resonator 22 and fourth order stripline resonator 24 to be carried out cross-coupling, Z-type coupling line 31 includes
The first segment 311 being extended along 11 width direction of ceramic matrix extends with second segment 312 and along 11 length direction of ceramic matrix
The third section 313 of setting, second segment 312 and first segment 311 are connected with the both ends of third section 313 respectively, second segment 312 and first
Section 311 is located at the two sides of third section 313, and second segment 312 is located at the top of second-order stripline resonator 22, first segment
311 are located at the top of fourth order stripline resonator 24.So as to by adjusting second segment 312, first segment 311 and third section
313 length and width, control, coupling amount.The structure can guarantee that six rank resonators, 20 coupling amount is identical.
Referring to Figure 4 together, the equivalent circuit of lamination sheet type bandpass filter of the present invention, 20 equivalent bands of each resonator
Shape line resonator and its loading capacitance, i.e. the first rank stripline resonator 21 are equivalent to stripline resonator R1 power-up and hold C1, the
Second order stripline resonator 22 is equivalent to stripline resonator R2 power-up and holds C2, and third rank stripline resonator 23 is equivalent to band-like
C3 is held in line resonator R3 power-up, and fourth order stripline resonator 24 is equivalent to stripline resonator R4 power-up and holds C4, the 5th rank band
Shape line resonator 25 is equivalent to stripline resonator R5 power-up and holds C5, and the 6th rank stripline resonator 26 is equivalent to strip line resonance
C6 is held in device R6 power-up, and the filter function of the lamination sheet type bandpass filter is realized by resonance and coupling mechanism, in which: M12、M23、
M34、M45、M56To close on coupling, M24For cross-coupling；It thereby may be ensured that identical coupling amount, reduce pass band insertion loss, promoted
Stopband inhibits, high reliablity.
Lamination sheet type bandpass filter provided by the invention, compared with prior art, the present invention pass through three layers of six rank of setting
200 resonator of strip line, so that the triple layer belt shape line 200 of each resonator 20 forms two additional plate loading capacitances, so that
20 length of resonator is much smaller than 1/4 wavelength；Six rank resonators 20 are set in two planes of different height, to make full use of
Longitudinal space shortens horizontal spacing while guaranteeing identical coupling amount, integrates so that the lamination sheet type bandpass filter has
Du Genggao, the features such as small in size, pass band insertion loss is small, stopband inhibits high, high reliablity；And use low-temperature co-fired ceramics skill
When art is processed, processing technology is simple, cost is relatively low.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
The interlayer spacing of specific embodiment, the triple layer belt shape line 200 of each resonator 20 is identical, and top layer strip line 202 and bottom band
Shape line 203 is arranged about 201 mirror symmetry of middle layer strip line；In each resonator 20: a termination of middle layer strip line 201
The other end on ground, middle layer strip line 201 is hanging, and top layer strip line 202 is outstanding close to one end of the ground connection of middle layer strip line 201
Sky, the other end ground connection of top layer strip line 202, bottom strip line 203 are outstanding close to one end of the ground connection of middle layer strip line 201
Sky, the other end ground connection of bottom strip line 203.Not only facilitate processing and fabricating, convenient for design, while can guarantee each resonator 20
Symmetry, reduce pass band insertion loss.
Further, the middle layer strip line 201 of the first rank stripline resonator 21, third rank stripline resonator 23 it
The middle layer strip line 201 of middle layer strip line 201 and the 5th rank stripline resonator 25 is located at lower plane 42；First rank is band-like
The top layer strip line 202 of line resonator 21, the top layer strip line 202 of third rank stripline resonator 23 and the 5th rank strip line are humorous
The top layer strip line 202 of vibration device 25 is generally aligned in the same plane；The bottom strip line 203 of first rank stripline resonator 21, third rank
The bottom strip line 203 of stripline resonator 23 and the bottom strip line 203 of the 5th rank stripline resonator 25 are located at same flat
Face；Meanwhile the middle layer band of the middle layer strip line 201 of second-order stripline resonator 22, fourth order stripline resonator 24
The middle layer strip line 201 of shape line 201 and the 6th rank stripline resonator 26 is located at lower plane 42；Second-order stripline resonator
22 top layer strip line 202, the top layer strip line 202 of fourth order stripline resonator 24 and the 6th rank stripline resonator 26 it
Top layer strip line 202 is generally aligned in the same plane；Bottom strip line 203, the fourth order strip line of second-order stripline resonator 22 are humorous
The bottom strip line 203 of vibration device 24 and the bottom strip line 203 of the 6th rank stripline resonator 26 are generally aligned in the same plane；Second-order
The 203 place plane of bottom strip line of stripline resonator 22 is located at the top layer strip line 202 of the first rank stripline resonator 21
The top of place plane, i.e., it is corresponding each to be integrally located at lower plane 42 for each layer strip line 200 in the upper corresponding each resonator 20 of plane 41
In resonator 20 on each layer strip line 200.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, in each resonator 20: the width of middle layer strip line 201 is less than top layer strip line 202, and middle layer is band-like
The width of line 201 is less than bottom strip line 203, so as to the symmetry of good each resonator 20 of guarantee, reduces pass band insertion loss.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, each resonator 20 further includes protrusion band 204 corresponding with the free end of each layer strip line 200 respectively, each convex
Band 204 and corresponding free end interval are arranged out, and each band 204 that protrudes is grounded, and to enhance the consistency of each layer strip line 200, subtract
Small pass band insertion loss.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, the lamination sheet type bandpass filter further include two ground connection for being respectively arranged on the left and right sides of ceramic matrix 11
Band 14, each counterpoise grounding 14 are connected with neighbouring protrusion band 204, and the ground terminal of each strip line 200 is connected with neighbouring counterpoise grounding 14, i.e., respectively
It respectively protrudes band 204 in resonator 20 to be connected with neighbouring counterpoise grounding 14, the ground terminal of each layer strip line 200 and neighbour in each resonator 20
Proximity area 14 is connected.Counterpoise grounding 14 is set, so that each protrusion band 204 to be grounded, while being convenient for one end of each strip line 200
Ground connection.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, each counterpoise grounding 14 use non-through form with input terminal 12, i.e. input terminal 12 is staggered with each counterpoise grounding 14,
Two counterpoise groundings 14 are located at the left and right sides of ceramic matrix 11 as shown in figure 1, and input terminal 12 is then along 11 height of ceramic matrix
Direction setting；Each counterpoise grounding 14 uses non-through form with output end 13, i.e. output end 13 is staggered with each counterpoise grounding 14, such as schemes
Two counterpoise groundings 14 are located at the left and right sides of ceramic matrix 11 in 1, and output end 13 is then along 11 short transverse of ceramic matrix
Setting；So as to reduce because distance is too small between input terminal 12, output end 13 and corresponding counterpoise grounding 14, and the short circuit generated is general
Rate.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, each 20 length of rank resonator is different, to realize asynchronous tuning manner, and then reduces pass band insertion loss, mentions
Rise stopband inhibition and reliability.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
The middle layer strip line 201 of specific embodiment, the first rank stripline resonator 21 is connected with input terminal 12, the 6th rank strip line
The middle layer strip line 201 of resonator 26 is connected with output end 13, to reduce pass band insertion loss.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, the lamination sheet type bandpass filter further include being set to the upper earth plate 33 of the upside of ceramic matrix 11 and being set to
The lower earth plate 32 of the downside of ceramic matrix 11, distance and the upper plane 41 to upper earth plate 33 of lower plane 42 to lower earth plate 32
Distance it is roughly equal, to guarantee longitudinally asymmetric property as far as possible, reduce and be lost by earth plate surface roughness bring.In addition,
It is roughly equal, refer to as far as possible guarantee lower plane 42 to lower earth plate 32 distance at a distance from upper plane 41 to upper earth plate 33
It is equal, allow certain foozle certainly.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, the edge of upper 33 two sides of earth plate offer the upper notch 331 for being used to form areas of dielectric, lower ground connection respectively
The edge of 32 two sides of plate offers the lower notch 321 for being used to form areas of dielectric respectively, to reduce pass band insertion loss.More into one
Step, the length of each upper notch 331 is 0.75mm on upper earth plate 33, and the width of each upper notch 331 is 0.2mm；Lower earth plate
The length of each lower notch 321 is 0.75mm on 32, and the width of each lower notch 321 is 0.2mm.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, the first rank stripline resonator 21 are arranged with the interval of input terminal 12, the 6th rank stripline resonator 26 with it is defeated
The setting of the interval of outlet 13, inhibits unnecessary parasitic mode.
The lamination sheet type bandpass filter further includes connect the first rank stripline resonator 21 with input terminal 12 first
Tap 34 and the second tap 35 for connecting the 6th rank stripline resonator 26 with output end 13.External sort factor (external Q
Value) it is mainly band-like by the first tap 34 and the first rank stripline resonator 21 overlapped position and the second tap 35 and the 6th rank
Overlapped the position of line resonator 26 determines, in order to promote external sort factor.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
The width of specific embodiment, the first tap 34 and 12 connecting place of input terminal is by the input terminal 12 to the side far from the input terminal 12
To being in gradually-reducing shape；The width of second tap 35 and 13 connecting place of output end is by the output end 13 to the direction far from the output end 13
It is in gradually-reducing shape；To reduce the influence of parasitic parameter while guaranteeing termination electrode connection reliability.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, the first tap 34 are single layer folded strip line, and the second tap 35 is single layer folded strip line, are further ensured that
Termination electrode connection reliability, while reducing the influence of parasitic parameter.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, the length of ceramic matrix 11 are 3.2mm, and the width of ceramic matrix 11 is 1.6mm, the height of ceramic matrix 11
For 0.9mm, so that the lamination sheet type bandpass filter small volume.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, the both ends of ceramic matrix 11 are respectively equipped with input terminal 12 and output end 13, divide at left and right sides of ceramic matrix 11
Not She You counterpoise grounding 14, two counterpoise groundings 14 are respectively formed two ground terminals.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, the length of input terminal 12 along the y axis are 0.4mm, i.e., the width of input terminal 12 is 0.4mm；Output end 13
Length along the y axis is 0.4mm, i.e., the width of output end 13 is 0.4mm；The length of counterpoise grounding 14 in X direction is 2.7mm,
I.e. the length of counterpoise grounding 14 is 2.7mm.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, ceramic dielectric constant is 11.0-15.0, α≤0.002 dielectric loss factor tan in ceramic matrix 11；
The ceramic dielectric constant of the ceramic matrix 11 made is 11.0-15.0, α≤0.002 dielectric loss factor tan, to mention
Reliability is risen, pass band insertion loss is reduced.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, each resonator 20 is all made of metallic silver production, to promote electric conductivity.Each layer strip line of each resonator 20
200 are made of metallic silver.Further, the silver thickness of each layer strip line 200 of each resonator 20 is 10 ± 3 μm.Into one
Each protrusion band 204 on step ground, each resonator 20 is made of metallic silver.The silver thickness of each protrusion band 204 of each resonator 20
It is 10 ± 3 μm.
Further, the first tap 34 is all made of metallic silver production, to promote electric conductivity.Further, the first tap
34 silver thickness is 10 ± 3 μm.
Further, the second tap 35 is all made of metallic silver production, to promote electric conductivity.Further, the second tap
35 silver thickness is 10 ± 3 μm.
Further, upper earth plate 33 and lower earth plate 32 are all made of metallic silver production, to promote electric conductivity.Further
Ground, the silver thickness of upper earth plate 33 are 10 ± 3 μm.The silver thickness of lower earth plate 32 is 10 ± 3 μm.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, input terminal 12 is made of metallic silver, to promote electric conductivity.The silver thickness of input terminal 12 is 15 ± 3 μ
m.Output end 13 is made of metallic silver, to promote electric conductivity.The silver thickness of output end 13 is 15 ± 3 μm.
Further, one kind also referring to Fig. 1 to Fig. 3, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, each counterpoise grounding 14 is made of metallic silver, to promote electric conductivity.The silver thickness of each counterpoise grounding 14 is 15
±3μm。
Further, one kind also referring to Fig. 1 to Fig. 5, as lamination sheet type bandpass filter provided by the invention
Specific embodiment, the working frequency of the lamination sheet type bandpass filter are that range is 5500 ± 500MHz, i.e. the lamination sheet type
The working frequency of bandpass filter is that range is 5000MHz-6000MHz.
The lamination sheet type bandpass filter can be made of LTCC technique, such as be made from the bottom up at the time of molding
Make: first with the folded lower part blanket layer of blank medium diaphragm, successively printing each layer metallic pattern from the bottom to top, connect under being formed with production
Floor 32, each resonator 20, the first tap 34, the second tap 35 and upper earth plate 33, then the blank medium film of stacked on part
Piece.After sinter molding, outside port is printed using screen printing technique, to make each counterpoise grounding 14, input terminal 12 and output end
13。
Further, the emulation also referring to Fig. 1 to Fig. 5, as lamination sheet type bandpass filter provided by the invention
Result figure, S in figure11For return loss plot in each frequency in emulation；S21For insertion loss curve in each frequency in emulation；By
Simulation result is it is found that the free transmission range of the lamination sheet type bandpass filter is 5000MHz~6000MHz, insertion in free transmission range
Loss is less than 2.5dB, and return loss is less than 19dB；Stopband inhibits to be greater than 33dB in DC-4600MHz frequency range, in 6400-
It is greater than 32dB in 12000MHz frequency range.
Lamination sheet type bandpass filter of the invention can be applied in C-band front end assemblies field, can also apply
The fields such as microwave communication, radar system, electronic countermeasure.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. lamination sheet type bandpass filter, including ceramic matrix, six rank resonators being set in the ceramic matrix, respectively set
Input terminal and output end in the ceramic matrix both ends, it is characterised in that: each resonator is along the ceramic matrix width
Direction is extended, and each resonator is triple layer belt shape line resonator；Resonator described in six ranks includes along the ceramic base
The first rank stripline resonator that body length direction is set gradually, second-order stripline resonator, third rank stripline resonator,
Fourth order stripline resonator, the 5th rank stripline resonator and the 6th rank stripline resonator, and the first rank strip line
Resonator, the third rank stripline resonator and the 5th rank stripline resonator are located at lower plane, the second-order band
Shape line resonator, the fourth order stripline resonator and the 6th rank stripline resonator are located at upper plane, described lower flat
Face is in the lower section of the upper plane along the ceramic matrix short transverse, and the first rank stripline resonator connection is described defeated
Enter end, the 6th rank stripline resonator connects the output end；The lamination sheet type bandpass filter further includes will be described
Second-order stripline resonator and the fourth order stripline resonator carry out the cross-linked Z-type coupling line, the Z-type
Coupling line includes along the extended second segment of the ceramic matrix width direction and first segment and along the ceramic matrix length
The extended third section in direction, the second segment and the first segment are connected with the both ends of the third section respectively, and described the
Two sections and the first segment are located at the two sides of the third section, and the second segment is located at the second-order stripline resonator
Top, the first segment is located at the top of the fourth order stripline resonator.
2. lamination sheet type bandpass filter as described in claim 1, it is characterised in that: the triple layer belt shape line of each resonator
Interlayer spacing it is identical, and strip line described in top layer is set with the strip line mirror symmetry described in middle layer of strip line described in bottom
It sets, one end ground connection of strip line described in middle layer, the other end of strip line described in middle layer is hanging, and strip line described in top layer is close
One end of the ground connection of the middle layer strip line is hanging, the other end ground connection of strip line described in top layer, and strip line described in bottom leans on
One end of the ground connection of the nearly middle layer strip line is hanging, the other end ground connection of strip line described in bottom.
3. lamination sheet type bandpass filter as claimed in claim 2, it is characterised in that: each resonator further include respectively with
The corresponding protrusion band of free end of each layer strip line, the protrusion band are arranged with the corresponding free end interval, each described
Protrusion band is grounded.
4. lamination sheet type bandpass filter as claimed in claim 3, it is characterised in that: the lamination sheet type bandpass filter is also
Two counterpoise groundings including being respectively arranged on the left and right sides of the ceramic matrix, each counterpoise grounding and the neighbouring protrusion band phase
Even, the ground terminal of each strip line is connected with the neighbouring counterpoise grounding.
5. lamination sheet type bandpass filter according to any one of claims 1-4, it is characterised in that: the lamination sheet type band logical
Filter further includes the lower ground connection set on the upper earth plate of the upside of the ceramic matrix and set on the downside of the ceramic matrix
The distance of plate, the lower plane to the lower earth plate is roughly equal at a distance from the upper plane to the upper earth plate.
6. lamination sheet type bandpass filter as claimed in claim 5, it is characterised in that: the edge of the upper earth plate two sides point
The upper notch for being used to form areas of dielectric is not offered, and the edge of the lower earth plate two sides offers respectively is used to form medium
The lower notch in region.
7. lamination sheet type bandpass filter according to any one of claims 1-4, it is characterised in that: the first rank strip line
Resonator and the input terminal interval are arranged, and the 6th rank stripline resonator and the output end interval are arranged, described folded
Synusia formula bandpass filter further includes the first tap for connecting the first rank stripline resonator with the input terminal and will
The second tap that the 6th rank stripline resonator is connect with the output end.
8. lamination sheet type bandpass filter as claimed in claim 7, it is characterised in that: first tap and the input terminal
The width of connecting place is in gradually-reducing shape by the input terminal to the direction far from the input terminal；Second tap and the output end phase
Width at even is in gradually-reducing shape by the output end to the direction far from the output end.
9. lamination sheet type bandpass filter as claimed in claim 7, it is characterised in that: first tap is single-layer folded stacked strips
Shape line, second tap are single layer folded strip line.
10. lamination sheet type bandpass filter according to any one of claims 1-4, it is characterised in that: each resonator
Length is different.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811231219.7A CN109301407A (en) | 2018-10-22 | 2018-10-22 | Lamination sheet type bandpass filter |
| PCT/CN2019/079889 WO2019158130A1 (en) | 2018-10-22 | 2019-03-27 | Stacked sheet-type bandpass filter |
| JP2019524398A JP6793829B2 (en) | 2018-10-22 | 2019-03-27 | Laminated chip bandpass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811231219.7A CN109301407A (en) | 2018-10-22 | 2018-10-22 | Lamination sheet type bandpass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109301407A true CN109301407A (en) | 2019-02-01 |
Family
ID=65157499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811231219.7A Pending CN109301407A (en) | 2018-10-22 | 2018-10-22 | Lamination sheet type bandpass filter |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6793829B2 (en) |
| CN (1) | CN109301407A (en) |
| WO (1) | WO2019158130A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034368A (en) * | 2019-04-24 | 2019-07-19 | 南京理工大学 | LTCC modified delamination helix formula balun power splitter |
| WO2019158130A1 (en) * | 2018-10-22 | 2019-08-22 | 深圳振华富电子有限公司 | Stacked sheet-type bandpass filter |
| CN113708027A (en) * | 2021-08-23 | 2021-11-26 | 成都频岢微电子有限公司 | Capacitor loading type miniaturized 5G filter based on multilayer PCB structure |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102589444B1 (en) * | 2020-12-22 | 2023-10-16 | 주식회사 에이오티코리아 | Bandpass filter using low temperature co-fired ceramic process |
| WO2022209277A1 (en) * | 2021-03-29 | 2022-10-06 | 株式会社村田製作所 | Dielectric filter |
| CN117099258A (en) * | 2021-03-29 | 2023-11-21 | 株式会社村田制作所 | dielectric filter |
| WO2023090039A1 (en) * | 2021-11-17 | 2023-05-25 | 株式会社村田製作所 | Dielectric resonator and dielectric filter |
| CN115866936B (en) * | 2023-03-01 | 2023-05-30 | 四川斯艾普电子科技有限公司 | Method for realizing multilayer circuit board by adopting thick film technology |
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| CN109301407A (en) * | 2018-10-22 | 2019-02-01 | 深圳振华富电子有限公司 | Lamination sheet type bandpass filter |
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2019
- 2019-03-27 JP JP2019524398A patent/JP6793829B2/en active Active
- 2019-03-27 WO PCT/CN2019/079889 patent/WO2019158130A1/en active Application Filing
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| CN102509829A (en) * | 2011-10-27 | 2012-06-20 | 无锡南理工科技发展有限公司 | Miniature C-band band-pass filter with low insertion loss and excellent high-order harmonic suppression |
| CN102610886A (en) * | 2012-03-22 | 2012-07-25 | 南京理工大学常熟研究院有限公司 | L-waveband high stopband rejection micro band-pass filter |
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|---|---|---|---|---|
| WO2019158130A1 (en) * | 2018-10-22 | 2019-08-22 | 深圳振华富电子有限公司 | Stacked sheet-type bandpass filter |
| CN110034368A (en) * | 2019-04-24 | 2019-07-19 | 南京理工大学 | LTCC modified delamination helix formula balun power splitter |
| CN113708027A (en) * | 2021-08-23 | 2021-11-26 | 成都频岢微电子有限公司 | Capacitor loading type miniaturized 5G filter based on multilayer PCB structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020510326A (en) | 2020-04-02 |
| WO2019158130A1 (en) | 2019-08-22 |
| JP6793829B2 (en) | 2020-12-02 |
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Application publication date: 20190201 |