CN208690464U - A kind of LTCC bandpass filter suitable for L-band - Google Patents
A kind of LTCC bandpass filter suitable for L-band Download PDFInfo
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- CN208690464U CN208690464U CN201821212989.2U CN201821212989U CN208690464U CN 208690464 U CN208690464 U CN 208690464U CN 201821212989 U CN201821212989 U CN 201821212989U CN 208690464 U CN208690464 U CN 208690464U
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Abstract
The utility model discloses a kind of LTCC bandpass filters suitable for L-band, including four concatenated resonant elements, four resonant elements are distributed in LTCC bandpass filter in matrix pattern, two resonant elements wherein gone together constitute a resonance group, main resonance group and time resonance group are arranged above and below, and flow through the signal of bandpass filter followed by secondary the first resonant element of resonance group, the first resonant element of main resonance group, the second resonant element of main resonance group and secondary the second resonant element of resonance group.Four resonant elements in filter are that four resonant elements are distributed in matrix pattern with the setting of 4 rank cross coupling structures by the utility model, solve current L-band level Four LTCC bandpass filter, it is necessary to which additional setting coupling element realizes the problem of staggeredly coupling.The LTCC bandpass filter that this kind is suitable for L-band solves current L-band LTCC bandpass filtering existing the problems such as structure is complicated, preparation is difficult, bandpass filtering narrow bandwidth.
Description
Technical field
The utility model relates to a kind of filter, especially setting is related to a kind of LTCC bandpass filter suitable for L-band.
Background technique
Filter is a Primary Component of communication system, it primarily serves the effect of frequency selection, it is usually located at hair
It send in receiving unit, and sends and receives the critical component that component is communication system, so the fine or not shadow of filter
The performance of entire module or even whole system is rung, therefore how to prepare miniaturization and the high filter of performance becomes people
Research object.And LTCC (low-temperature co-fired ceramics) new material technology, in a substrate by operplate printing, and laminated,
Interconnection is formed it into, finally cofiring under cryogenic, the metallic equivalent of printing capacitor and inductor resistance in circuit, such three
Space utilization degree both can be improved in dimension circuit structure, achievees the purpose that miniaturization, can also largely reduce first device
The influence of ghost effect and coupling effect between part improves the reliability of entire communication system, therefore can use LTCC
Technical matters manufactures filter.
Currently, LTCC filter has largely been used in the medium-high frequencies wave band such as L-band, with small in size, stability is good, easy
In with the connection of other devices the advantages that, but its disadvantage is also fairly obvious.Specifically, bandpass filter is usually with multiple resonance
Unit couples to obtain, and the quantity of resonant element present in bandpass filter is the order of bandpass filter thus, more
Order can make the sideband of bandpass filter precipitous more ideal, but resonant element part is coupled, and coupling element value is not
Can be excessive or too small, otherwise all filter band-pass response can be caused bad, faced with this situation, the sideband of bandpass filter is precipitous
There are contradictions between effect and band logical bandwidth.Current L-band LTCC bandpass filter generally selects the side for guaranteeing bandpass filter
With precipitous effect, with the design of multiple resonant element parallelly distribute on structures, wherein mutually non-conterminous resonant element must be additionally arranged
Coupled structure realizes the staggeredly coupling between mutually non-conterminous resonant element, so that filter internal structure is complicated, preparation difficulty adds
Greatly.Also, also in that additional designs is needed to realize the coupling element of staggeredly coupling, so that the difficulty of circuit design increases, cloth
Technical effect caused by office can make the electrical characteristics of filter bad or even generate the coupling effect for being difficult to overcome, logical at present to this
The bandwidth of sacrifice bandpass filter is often used to solve the problems, such as this.In this regard, needing a kind of new L-band LTCC band logical in practice
Filter solves current bandpass filter existing the problems such as structure is complicated, preparation is difficult, bandpass filtering narrow bandwidth.
Utility model content
The utility model provides a kind of LTCC bandpass filter suitable for L-band, it is intended to solve current L-band LTCC
Bandpass filtering is existing, and structure is complicated, prepares the problems such as difficult, bandpass filtering narrow bandwidth.
The utility model provides a kind of LTCC bandpass filter suitable for L-band, including four concatenated resonance lists
Member, four resonant elements are distributed in LTCC bandpass filter in matrix pattern, between four resonators, are had and are passed through inductance
It intercouples, has and intercoupled by capacitor, increased by coupling ability between resonator and reduce inductance value and capacitance, wherein together
Two capable resonant elements constitute a resonance group, and main resonance group and time resonance group are arranged above and below, and flow through the letter of bandpass filter
Number followed by secondary the first resonant element of resonance group, the first resonant element of main resonance group, the second resonant element of main resonance group and secondary
The second resonant element of resonance group.
A kind of LTCC bandpass filter suitable for L-band provided by the utility model includes four resonant elements, i.e., should
Bandpass filter is quadravalence filtering, has the precipitous more effect of preferable sideband, may be implemented that upper sideband is precipitous more to spend, and four resonance
Unit is distributed in matrix pattern, and each resonant element is adjacent two-by-two, mutually there is coupling, the case where not increasing other coupling elements
Under, that is, realize staggeredly coupling for resonant element.It is not connected with each other between four resonators of the utility model, passes through space coupling
Conjunction forms energy transmission, can be precisely controlled to bandwidth by controlling the distance between they, and then obtain high performance filter
Wave device, its bandwidth reaches 400MHz on L-band, and inhibits to reach 30dB at 800MHz and 1600MHz, solves L-band band
The narrow problem of bandpass filter bandwidth.Relative to the L-band level Four LTCC bandpass filter of current same type, current band logical
Filter is generally placed in parallel by triple layer belt shape, although can also couple by adjusting the distance between resonant element to adjust
Power, but wherein there is non-conterminous coupling unit, the additional coupling element that is arranged realizes that staggeredly coupling will lead to band logical filter again
Structure is complicated for wave device, difficult design, it is difficult to which the distance between adjustment adjustment resonant element is to realize that adjustment coupling is strong and weak.It is specific and
Speech, by taking input terminal to output end is followed successively by the first resonant element to the 4th resonant element as an example, the first resonance in the prior art
Unit and the 4th resonant element are simultaneously non-conterminous, it is necessary to introduce cross-coupling in the first resonant element and the 4th resonant element part to increase
Add transmission zero, increase stopband attenuation, the existing LTCC bandpass filter that design structure complexity is cannot adjust well
Coupling power is to obtain ideal band-pass response.And four resonant elements in filter are intersected coupling with 4 ranks by the utility model
It closes structure setting i.e. four resonant element to be distributed in matrix pattern, solves current L-band level Four LTCC bandpass filter, it is necessary to volume
Outer setting coupling element realizes the problem of staggeredly coupling.Also, due to using 4 rank cross coupling structures, the utility model institute
Bandpass filter is stated because left and right is all symmetrical, top and the bottom are symmetrical, therefore preparation process is simple, and low manufacture cost is simple and easy to do.
Bandwidth can be precisely controlled by controlling the distance between they, it is available than wider band logical bandwidth.This kind is applicable in
In L-band LTCC bandpass filter under the premise of guaranteeing that upper sideband is precipitous and more spending, solve the filter of current L-band LTCC band logical
Wave is existing, and structure is complicated, prepares the problems such as difficult, bandpass filtering narrow bandwidth.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of ceramic band-pass filter suitable for L-band.
Specific embodiment
As shown in Figure 1, a kind of LTCC bandpass filter suitable for L-band, including four concatenated resonant elements, it is described
Four resonant elements be distributed in LTCC bandpass filter in matrix pattern, wherein two resonant elements going together constitute one it is humorous
Vibration group, main resonance group and time resonance group are arranged above and below, and flow through the signal of bandpass filter followed by secondary the first resonance of resonance group
Unit, the first resonant element of main resonance group, the second resonant element of main resonance group and secondary the second resonant element of resonance group.This is practical new
Four resonant elements in filter are that four resonant elements are distributed in matrix pattern with the setting of 4 rank cross coupling structures by type, solution
It has determined current L-band level Four LTCC bandpass filter, it is necessary to which additional setting coupling element realizes the problem of staggeredly coupling.Also,
Due to using 4 rank cross coupling structures, bandpass filter described in the utility model is because of whole symmetrical, the top and the bottom pair in left and right
Claim, therefore preparation process is simple, low manufacture cost, it is simple and easy to do.By controlling the distance between they essence can be carried out to bandwidth
Quasi- control, it is available than wider band logical bandwidth.The LTCC bandpass filter that this kind is suitable for L-band is guaranteeing that upper sideband is steep
It is high and steep more spend under the premise of, solving current L-band LTCC bandpass filtering, existing structure is complicated, preparation is difficult, bandpass filtering
The problems such as narrow bandwidth.
As shown in Figure 1, the secondary resonance group includes three-layer metal layer, and the secondary resonance group the first metal layer, secondary resonance group
Second metal layer, secondary resonance group third metal layer sequentially have being vertically arranged for gap, set on the secondary resonance group the first metal layer
Set time resonance group common electrode plate 1；Time resonance group first electrode plate 2 and time resonance group is set side by side in secondary resonance group second metal layer
Second electrode plate 11；Time the first inductance of resonance group 4 and time the second inductance of resonance group 13 is set side by side in secondary resonance group third metal layer；
The secondary resonance group second metal layer and time resonance group third metal interlevel are provided with through-hole column, the secondary resonance group first electrode
Plate 2 connect by through-hole column 3 with the first inductance of time resonance group 4, the secondary resonance group second electrode plate 11 pass through through-hole column 12 and
Secondary the second inductance of resonance group 13 connects.Secondary resonance group common electrode plate 1, secondary resonance group first electrode plate 2, through-hole column 3 and secondary humorous
The first inductance of vibration group 4 constitutes first resonant element of resonance group, secondary resonance group common electrode plate 1 and time resonance group first electrode
Plate 2 constitutes time resonance group first capacitor C1, and through-hole column 3 and time the first inductance of resonance group 4 constitute time resonance the first inductance of group
Device L1；Secondary resonance group common electrode plate 1, secondary resonance group second electrode plate 11, through-hole column 12 and secondary 13 structure of the second inductance of resonance group
At second resonant element of secondary resonance group, secondary resonance group common electrode plate 1 and time resonance group second electrode 11 resonance groups of plate
Second capacitor C4, through-hole column 12 and time the second inductance of resonance group 13 constitute time resonance the second inductor of group L4.Secondary resonance group is common
Electrode plate 1, secondary the first inductance of resonance group 4 and secondary the second inductance of resonance group 13 are respectively and outside the LTCC bandpass filter of L-band
GND connection.
As shown in Figure 1, the main resonance group includes five layers of metal layer, the main resonance group the first metal layer, main resonance group
Second metal layer, main resonance group third metal layer, the 4th metal layer of main resonance group, main resonance group fifth metal layer sequentially have gap
Be vertically arranged；The first inductance of main resonance group 5 and the second inductance of main resonance group 14 is set side by side in main resonance group the first metal layer；It is main
A plate 7 of main resonance group first electrode plate and a plate of main resonance group second electrode plate is set side by side in resonance group second metal layer
16, two plates 9 and main resonance group second electrode plate of main resonance group first electrode plate are set side by side in the 4th metal layer of main resonance group
Two plates 18, main resonance group second metal layer and the 4th metal interlevel of main resonance group are provided with through-hole column, the main resonance group first
One plate 7 of electrode plate and two plates 9 of main resonance group first electrode plate are connected by through-hole column 8, main resonance group first electrode plate
Two plates 9 of one plate 7 and main resonance group first electrode plate collectively form main resonance group first electrode plate, second electricity of main resonance group
One plate 16 of pole plate and two plates 18 of main resonance group second electrode plate are connected by through-hole column 17, main resonance group second electrode plate
Two plates 18 of one plate 16 and main resonance group second electrode plate collectively form main resonance group second electrode plate；The first metal of main resonance group
Layer is provided with through-hole column with main resonance group second metal layer part, and first inductance of main resonance group 5 passes through through-hole column 6 and main resonance
Group first electrode plate connection, second inductance of main resonance group 14 are connect by through-hole column 15 with main resonance group second electrode plate；
The main resonance group third metal layer is located between the 4th metal layer of main resonance group second metal layer and main resonance group, and the master is humorous
Coupling electrode plate 19 is arranged in vibration group third metal layer center, and setting main resonance group is jointly electric in the main resonance group fifth metal layer
Pole plate 10.The first inductance of main resonance group 5, through-hole column 6, a plate 7 of main resonance group first electrode plate, through-hole column 8, main resonance group
Two plates 9 and main resonance group common electrode plate 10 of one electrode plate collectively form the first resonant element of main resonance group, main resonance group
One inductance 5 and through-hole column 6 constitute main resonance group the first inductance L2, a plate 7 of main resonance group first electrode plate, through-hole column 8, master
Two plates 9 and main resonance group common electrode plate 10 of resonance group first electrode plate collectively form main resonance group first capacitor C2, capacitor
C2 uses two layers of capacitance structure.The second inductance of main resonance group 14, through-hole column 15, main resonance group second electrode plate a plate 16, logical
It is humorous that hole post 17, two plates 18 of main resonance group second electrode plate and main resonance group common electrode plate 10 collectively form main resonance group second
Shake unit, and the second inductance of main resonance group 14 and through-hole column 15 constitute the second inductance of main resonance group L3, main resonance group second electrode plate
A plate 16, through-hole column 17, two plates 18 of main resonance group second electrode plate and main resonance group common electrode plate 10 constitute main resonance
The second capacitor C3 of group.The first inductance of main resonance group 5, the second inductance of main resonance group 14 and main resonance group common electrode plate 10 respectively with
GND connection outside the LTCC bandpass filter of L-band.
A specific embodiment of the utility model, the LTCC bandpass filter of this kind of L-band are introduced below with reference to Fig. 1
It from top to bottom altogether include eight layers of metal layer, first layer is the top crown 1 of capacitor C1 and C4, and the second layer is the bottom crown 2 of capacitor C1
With the bottom crown 11 of capacitor C4, third layer is L1 inductance 4 and L4 inductance 13, and C1 bottom crown 2 and L1 inductance 4 are connected by through-hole column 3
It connects, C4 bottom crown 11 and L4 inductance 13 are connected by through-hole column 12, and the 4th layer is L2 inductance 5 and L3 inductance 14, and layer 5 is electricity
Hold C2 top crown 7 and capacitor C3 top crown 16, L2 inductance 5 and capacitor C2 top crown 7 to connect by through-hole column 6,14 He of L3 inductance
Capacitor C3 top crown 16 is connected by through-hole column 15, and layer 6 is coupled capacitor Cr19, and layer 7 is capacitor C2 top crown 9 and electricity
Hold C3 top crown 18, capacitor C2 top crown 7 and capacitor C2 top crown 9 to connect by through-hole column 8, capacitor C3 top crown 16 and capacitor
C3 top crown 18 is connected by through-hole column 17, the 8th layer of bottom crown 10 for capacitor C2 and C3.
Specifically, structure 1,2,3,4 constitutes first resonator (L1 and C1), structure 1,2 constitutes capacitor C1, electricity
Hold and use two layer capacitances, 1 is the top crown of capacitor C1, is connected with the GND of device exterior, and 2 be the lower step of capacitor C1.Structure 3,
4 constitute L1, wherein 4 be spiral inductance structure, 3 be through-hole column, are connected for connecting 2 and 4,4 with the GND of device exterior.Together
Sample, structure 1,11,12,13 constitute the 4th resonator (L4 and C4), and structure 1,11 constitutes capacitor C4, and capacitor uses two layers
Capacitor, 1 is the top crown of capacitor C4, is connected with the GND of device exterior, and 11 be the lower step of capacitor C1.Structure 12,13 constitutes
L4 is connected for connecting 11 and 13,13 with the GND of device exterior wherein 12 be through-hole column.Structure 5,6,7,8,9,10 constitutes
Second resonator (L2 and C1), structure 5,6 constitute L2, wherein 6 be through-hole column, for connecting 5 and 7,5 with device exterior
GND is connected.Structure 7,8,9,10 constitutes capacitor C2, and capacitor uses two layer capacitances, and 7,9 be the top crown of capacitor C2, and 8 be through-hole
Column, for connecting 7 and 9,10 be the lower step of capacitor C1, is connected with the GND of device exterior.Likewise, structure 14,15,16,
17,18,10 third resonator (L3 and C3) is constituted, structure 14,15 constitutes L3, wherein 15 be through-hole column, for connecting
14 and 16,14 are connected with the GND of device exterior.Structure 16,17,18,10 constitutes capacitor C3, and capacitor uses two layers of capacitive junctions
Structure, 16,18 be the top crown of capacitor C3, and 178 be through-hole column, and for connecting 16 and 18,10 be the lower step of capacitor C1, with device
External GND is connected.Structure 19 is coupled capacitor Cr, for increasing the energy coupling between 2 resonator 3 of resonator.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the protection scope of the utility model.
Claims (3)
1. a kind of LTCC bandpass filter suitable for L-band, which is characterized in that described including four concatenated resonant elements
Four resonant elements be distributed in LTCC bandpass filter in matrix pattern, wherein two resonant elements going together constitute one it is humorous
Vibration group, main resonance group and time resonance group are arranged above and below, and flow through the signal of bandpass filter followed by secondary the first resonance of resonance group
Unit, the first resonant element of main resonance group, the second resonant element of main resonance group and secondary the second resonant element of resonance group.
2. a kind of LTCC bandpass filter suitable for L-band according to claim 1, which is characterized in that described time humorous
Vibration group includes three-layer metal layer, the secondary resonance group the first metal layer, secondary resonance group second metal layer, secondary resonance group third metal
Layer sequentially has being vertically arranged for gap, and time resonance group common electrode plate is arranged on the secondary resonance group the first metal layer；Secondary resonance
Time resonance group first electrode plate and time resonance group second electrode plate is set side by side in group second metal layer；Secondary resonance group third metal layer
Time the first inductance of resonance group and time resonance the second inductance of group is set side by side；The secondary resonance group second metal layer and time resonance group the
Three metal interlevels are provided with through-hole column, and the secondary resonance group first electrode plate is connected by through-hole column and time resonance the first inductance of group
It connects, the secondary resonance group second electrode plate passes through through-hole column and time resonance the second inductance connection of group.
3. a kind of LTCC bandpass filter suitable for L-band according to claim 1, which is characterized in that the master is humorous
Vibration group includes five layers of metal layer, the main resonance group the first metal layer, main resonance group second metal layer, main resonance group third metal
Layer, the 4th metal layer of main resonance group, main resonance group fifth metal layer sequentially have being vertically arranged for gap；The first metal of main resonance group
The second inductance of the first inductance of main resonance group and main resonance group is set side by side in layer；Main resonance is set side by side in main resonance group second metal layer
Main resonance is set side by side in one plate of group first electrode plate and a plate of main resonance group second electrode plate, the 4th metal layer of main resonance group
Two plates of group first electrode plate and two plates of main resonance group second electrode plate, main resonance group second metal layer and main resonance group the 4th
Metal interlevel is provided with through-hole column, and a plate of the main resonance group first electrode plate and two plates of main resonance group first electrode plate are logical
The connection of through-hole column is crossed, a plate of main resonance group first electrode plate and two plates of main resonance group first electrode plate collectively form main resonance
Group first electrode plate, a plate of the main resonance group second electrode plate and two plates of main resonance group second electrode plate pass through through-hole column
Connection, a plate of main resonance group second electrode plate and two plates of main resonance group second electrode plate collectively form the second electricity of main resonance group
Pole plate；Main resonance group the first metal layer and main resonance group second metal layer part are provided with through-hole column, first electricity of main resonance group
Sense is connect by through-hole column with main resonance group first electrode plate, and second inductance of main resonance group passes through through-hole column and main resonance group
The connection of second electrode plate；The main resonance group third metal layer is located at the 4th metal of main resonance group second metal layer and main resonance group
Between layer, coupling electrode plate is arranged in the main resonance group third metal layer center, is arranged in the main resonance group fifth metal layer
Main resonance group common electrode plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821212989.2U CN208690464U (en) | 2018-07-27 | 2018-07-27 | A kind of LTCC bandpass filter suitable for L-band |
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| CN201821212989.2U CN208690464U (en) | 2018-07-27 | 2018-07-27 | A kind of LTCC bandpass filter suitable for L-band |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808185A (en) * | 2018-07-27 | 2018-11-13 | 广东风华高新科技股份有限公司 | A kind of LTCC bandpass filters suitable for L-band |
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- 2018-07-27 CN CN201821212989.2U patent/CN208690464U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808185A (en) * | 2018-07-27 | 2018-11-13 | 广东风华高新科技股份有限公司 | A kind of LTCC bandpass filters suitable for L-band |
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