CN206364161U - A kind of Stacked LTCC low pass filters - Google Patents
A kind of Stacked LTCC low pass filters Download PDFInfo
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- CN206364161U CN206364161U CN201720030367.7U CN201720030367U CN206364161U CN 206364161 U CN206364161 U CN 206364161U CN 201720030367 U CN201720030367 U CN 201720030367U CN 206364161 U CN206364161 U CN 206364161U
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Abstract
The utility model discloses a kind of Stacked LTCC low pass filters, the low pass filter includes input, output end and earth terminal；Connect access inductance L1 and inductance L2 between input and output end, the access electric capacity C1 in parallel and electric capacity C2 between input and earth terminal, the access electric capacity C3 in parallel and electric capacity C4 between output end and earth terminal, with earth terminal access electric capacity C5 at inductance L1, inductance L2 connecting node；Wherein：Inductance L1 and inductance L2 is to realize to connect by through hole between the vertical spin inductance of sandwich construction, different layers；Electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 and electric capacity C5 are vertical interdigital capacitor structure.The features such as low pass filter of the present utility model has small volume, lightweight, performance, high temperature stability, and patch form can be processed into, it is easy to integrated with other microwave components.
Description
Technical field
The utility model is related to microwave technical field, and in particular to a kind of Stacked LTCC low pass filters.
Background technology
As microwave, communication and its peripheral product and household electrical appliance are constantly to high frequency, miniaturization development, to first device
The miniaturization of part is integrated and modular requirement is more and more urgent.Low pass filter is used as radio circuit and the important nothing of system
Source device, it is necessary to be designed to superior performance, the low, size of loss small.The filtering that conventionally employed microstrip line, waveguide and cavity make
Although device, which can reach, is lost low purpose, often size is very big.
Utility model content
Weak point present in regarding to the issue above, the utility model provides a kind of Stacked LTCC LPFs
Device.
The utility model discloses a kind of Stacked LTCC low pass filters, the low pass filter includes input, defeated
Go out end and earth terminal；
Connect access inductance L1 and inductance L2 between input and output end, between input and earth terminal and couples
Enter electric capacity C1 and electric capacity C2, between output end and earth terminal access electric capacity C3 in parallel and electric capacity C4, in inductance L1, inductance L2
With earth terminal access electric capacity C5 at connecting node；Wherein：
The inductance L1 and inductance L2 is to realize to connect by through hole between the vertical spin inductance of sandwich construction, different layers
Connect；
The electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 and electric capacity C5 are vertical interdigital capacitor structure.
As further improvement of the utility model, the inductance L1, inductance L2, electric capacity C1, electric capacity C2, electric capacity C3, electricity
It is five-layer structure to hold C4 and electric capacity C5, and it collectively forms five layers of metal electrode of low pass filter；Wherein：
The head end connection input of the inductance L1 first layers, the tail end of layer 5 connects the 4th of electric capacity C5 the by through hole
Layer, first layer to layer 5 is connected by through hole spiral；
The head end connection output end of the inductance L2 first layers, the tail end of layer 5 connects the 4th of electric capacity C5 the by through hole
Layer, first layer to layer 5 is connected by through hole spiral；
The 4th layer of the electric capacity C5 is connected with the second layer by through hole, the first layer of the electric capacity C5, third layer,
Five layers of connection earth terminal；
The second layer of the electric capacity C1, the 4th layer of connection input, first layer, third layer, the layer 5 of the electric capacity C1
Connection corresponding with electric capacity C5 first layer, third layer, layer 5；
The second layer of the electric capacity C2, the 4th layer of connection input, first layer, third layer, the layer 5 of the electric capacity C2
Connection corresponding with electric capacity C5 first layer, third layer, layer 5；
The second layer of the electric capacity C3, the 4th layer of connection output end, first layer, third layer, the layer 5 of the electric capacity C3
Connection corresponding with electric capacity C5 first layer, third layer, layer 5；
The second layer of the electric capacity C4, the 4th layer of connection output end, first layer, third layer, the layer 5 of the electric capacity C4
Connection corresponding with electric capacity C5 first layer, third layer, layer 5.
As further improvement of the utility model, the thickness of the metal electrode is 20 μm, provided with pottery between metal electrode
Porcelain substrate.
Compared with prior art, the beneficial effects of the utility model are：
The utility model discloses a kind of Stacked LTCC low pass filters, the low pass filter has small volume, again
Amount is light, performance, high temperature stability the features such as, and patch form can be processed into, be easy to integrated with other microwave components；Separately
Outside, the utility model cost it is low, be adapted to batch production, can be widely used for the radio frequency such as mobile phone, bluetooth module, GPS, PDA, WLAN without
In line communication field.
Brief description of the drawings
Fig. 1 is the circuit diagram of Stacked LTCC low pass filters disclosed in a kind of embodiment of the utility model；
Fig. 2 is the top view of Stacked LTCC low pass filters disclosed in a kind of embodiment of the utility model；
Fig. 3 is Fig. 2 front view；
Fig. 4 is inductance L1, inductance L2 structure chart in Fig. 2；
Fig. 5 is electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 and electric capacity C5 connection figure in Fig. 2；
Fig. 6 is electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 structure chart in Fig. 5；
Fig. 7 is first layer, third layer, the structure chart of layer 5 of electric capacity in Fig. 6；
Fig. 8 is the second layer, the 4th layer of the structure chart of electric capacity in Fig. 6；
The structure chart that Fig. 9 is electric capacity C5 in Fig. 5；
First layer, third layer, the structure chart of layer 5 that Figure 10 is electric capacity C5 in Fig. 9；
The second layer, the 4th layer of structure chart that Figure 11 is electric capacity C5 in Fig. 9；
Figure 12 is the simulation result figure of Stacked LTCC low pass filters disclosed in a kind of embodiment of the utility model.
In figure：
1st, input；2nd, output end；3rd, earth terminal；4th, inductance L1；5th, inductance L2；6th, electric capacity C1；7th, electric capacity C2；8th, electric capacity
C3；9th, electric capacity C4；10th, electric capacity C5；11st, through hole；12nd, escape groove；13rd, support block.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched
The embodiment stated is a part of embodiment of the present utility model, rather than whole embodiments.Based on the reality in the utility model
Apply example, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made, all
Belong to the scope of the utility model protection.
It is that a kind of solution being effective is above-mentioned using multi-layer ceramics technology for technical problem present in prior art
The method of problem；The technology be already used to reduce device architecture size, and because its have three-dimensionally integrated, high stability with
And the advantages of high quality factor, the extensive use in radio frequency passive device.It is low that the utility model provides a kind of Stacked LTCC
Bandpass filter, the compact conformation based on LTCC technology, with the wave band high-performance that internal characteristic is good, Out-of-band rejection is high, stopband range is wide
Low pass filter.
The utility model is described in further detail below in conjunction with the accompanying drawings：
As Figure 1-3, the utility model provides a kind of Stacked LTCC low pass filters, and the low pass filter includes
Input 1, output end 2 and earth terminal 3；Connect access inductance L1 4 and inductance L2 5 between input 1 and output end 2,
Access electric capacity C1 6 and electric capacity C2 7 in parallel between input 1 and earth terminal 3, the access in parallel between output end 2 and earth terminal 3
Electric capacity C3 8 and electric capacity C4 9, with the access electric capacity of earth terminal 3 C5 10 at inductance L1 4, inductance L2 5 connecting node；Its
In：Inductance L1 4 and inductance L2 5 is to realize to connect by through hole 11 between the vertical spin inductance of sandwich construction, different layers；Electricity
It is vertical interdigital capacitor structure to hold C1 6, electric capacity C2 7, electric capacity C3 8, electric capacity C4 9 and electric capacity C5 10, and it passes through different layers
Between pole plate realize.
The metal electrode as shown in figure 3, Stacked LTCC low pass filters of the present utility model are of five storeys altogether, inductance L1 4,
Inductance L2 5, electric capacity C1 6, electric capacity C2 7, electric capacity C3 8, electric capacity C4 9 and electric capacity C5 10 are five-layer structure, its common structure
Into five layers of metal electrode of low pass filter；Wherein, two inductance of L1, L2 realize difference by five helical layer electrodes using through hole 11
Interconnection between layer, in L1, L2 both sides, the four grounded electric capacity of C1, C2, C3, C4 is realized also with 5 layers of electrode,
Middle part is by 1,2,3,4,5 layers of electrode constitute ground capacity C5.
Metal electrode thickness of the present utility model is 20um, and the multiple layer ceramic dielectric substrate filled between metal electrode leads to
Cross ceramic dielectric substrate and ensure the features such as low pass filter has small volume, lightweight, performance, high temperature stability.This practicality
New inductance is realized and connected that also by metal electrode through hole realize in parallel with electric capacity of inductance connects by metal electrode through hole up and down
Connect；By in input and earth terminal, output end and earth terminal two electric capacity in parallel, it is ensured that the frequency-selecting of the low pass filter
Can be good.
The 3.2*1.5*0.9mm of overall dimensions standard 1206 of the utility model low pass filter, its encapsulating structure, volume
Small, frequency-selecting performance is good, and temperature stability is good.The wave filter effectively reduces insertion loss simultaneously, and cut-off frequency curve is precipitous, frequency
Selectivity is good.
The annexation to each component in the utility model low pass filter elaborates below：
As shown in Figure 2,4, inductance L1 4 of the present utility model, the structures of inductance L2 5 are identical, are five helical layer structures；Electricity
Feel between L1 4, inductance L2 5 series connection access input 1 and output end 2.Wherein, the head end connection input of the first layers of inductance L1 4
End 1, the tail end of layer 5 connects the 4th layer of electric capacity C5 10 by through hole, and first layer to layer 5 is connected by the spiral of through hole 11
Connect；The head end connection output end 2 of the first layers of inductance L2 5, the tail end of layer 5 connects the 4th layer of electric capacity C5 10 by through hole,
First layer to layer 5 is connected by the spiral of through hole 11.
As shown in figure 9, electric capacity C5 10 of the present utility model is five-layer structure, its first layer, third layer, the knot of layer 5
Structure is identical, as shown in Figure 10；The second layer, the 4th layer of structure are identical, as shown in figure 11.Wherein, electric capacity C5 10 second layer,
Be equipped with two support blocks 13 on 4th layer, the 4th layer of support block 13 by through hole 11 respectively with inductance L1 4, inductance L2 5
It is connected, the 4th layer of support block 13 is connected by through hole 11 with the support block 13 of the second layer.Electric capacity C5 10 first layer,
Three layers, layer 5 connection earth terminal 3, meanwhile, electric capacity C5 10 first layer, third layer, layer 5, which are provided with, to be used to avoid through hole
11 escape groove, it is ensured that the structure of low pass filter is compacter.
As shown in Figure 5,6, the utility model electric capacity C1 6, electric capacity C2 7, electric capacity C3 8, electric capacity C4 9 structure it is identical,
The access electric capacity C1 6 and electric capacity C2 7 in parallel between input 1 and earth terminal 3, between output end 2 and earth terminal 3 and couples
Enter electric capacity C3 8 and electric capacity C4 9, with the access electric capacity of earth terminal 3 C5 10 at inductance L1 4, inductance L2 5 connecting node.With
Exemplified by electric capacity C1 6, electric capacity C1 6 first layer, third layer, the structure of layer 5 are identical, as shown in Figure 7；The second layer, the 4th layer
Structure it is identical, as shown in Figure 8.Wherein：Electric capacity C1 6 second layer, the 4th layer of connection input 1, the first of electric capacity C1 6
The corresponding connection of layer, third layer, layer 5 and electric capacity C5 10 first layer, third layer, layer 5, so that the of electric capacity C1 6
One layer, third layer, layer 5 connection earth terminal 3.Electric capacity C2 7 second layer, the 4th layer of connection input 1, the of electric capacity C2 7
One layer, the corresponding connection of third layer, layer 5 and electric capacity C5 10 first layer, third layer, layer 5, so that electric capacity C2 6
First layer, third layer, layer 5 connection earth terminal 3.Electric capacity C3 8 second layer, the 4th layer of connection output end 2, electric capacity C3's 8
The corresponding connection of first layer, third layer, layer 5 and electric capacity C5 10 first layer, third layer, layer 5, so that electric capacity C3 6
First layer, third layer, layer 5 connection earth terminal 3.Electric capacity C4 9 second layer, the 4th layer of connection output end 2, electric capacity C4 9
First layer, the corresponding connection of third layer, layer 5 and electric capacity C5 10 first layer, third layer, layer 5 so that electric capacity C4
6 first layer, third layer, layer 5 connection earth terminal 3.
As knowable to the simulation result figure of Figure 12 Stacked LTCC low pass filters of the present utility model, the low pass filter
Cut-off frequency be 1.9GHz, under 1.9GHz frequencies, the filter passband internal loss value is in below 1dB.In more than 1.9GHz
Frequency, loss is sharply increased.
The utility model discloses a kind of Stacked LTCC low pass filters, the low pass filter has small volume, again
Amount is light, performance, high temperature stability the features such as, and patch form can be processed into, be easy to integrated with other microwave components；Separately
Outside, the utility model is to be based on technique, and cost is low, is adapted to batch production.The low pass filter can be widely used for mobile phone, bluetooth mould
In the RF wireless communication such as block, GPS, PDA, WLAN field.
Preferred embodiment of the present utility model is these are only, the utility model is not limited to, for this area
Technical staff for, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle within,
Any modification, equivalent substitution and improvements made etc., should be included within protection domain of the present utility model.
Claims (3)
1. a kind of Stacked LTCC low pass filters, it is characterised in that the low pass filter includes input (1), output end
And earth terminal (3) (2)；
Connect access inductance L1 (4) and inductance L2 (5) between input (1) and output end (2), in input (1) and ground connection
Access electric capacity C1 (6) in parallel and electric capacity C2 (7) between (3) are held, the access electric capacity in parallel between output end (2) and earth terminal (3)
C3 (8) and electric capacity C4 (9), with earth terminal (3) access electric capacity C5 (10) at inductance L1 (4), inductance L2 (5) connecting node；
Wherein：
Realized and connected by through hole between the inductance L1 (4) and the vertical spin inductance that inductance L2 (5) is sandwich construction, different layers
Connect；
The electric capacity C1 (6), electric capacity C2 (7), electric capacity C3 (8), electric capacity C4 (9) and electric capacity C5 (10) are vertical interdigital capacitor knot
Structure.
2. Stacked LTCC low pass filters as claimed in claim 1, it is characterised in that the inductance L1 (4), inductance L2
(5), electric capacity C1 (6), electric capacity C2 (7), electric capacity C3 (8), electric capacity C4 (9) and electric capacity C5 (10) are five-layer structure, its common structure
Into five layers of metal electrode of low pass filter；Wherein：
The head end connection input (1) of inductance L1 (4) first layer, the tail end of layer 5 connects electric capacity C5 (10) by through hole
The 4th layer, first layer to layer 5 pass through through hole (11) spiral connect；
The head end connection output end (2) of inductance L2 (5) first layer, the tail end of layer 5 connects electric capacity C5 (10) by through hole
The 4th layer, first layer to layer 5 pass through through hole (11) spiral connect；
The 4th layer of the electric capacity C5 (10) is connected with the second layer by through hole, the first layer of the electric capacity C5 (10), the 3rd
Layer, layer 5 connection earth terminal (3)；
The second layer of the electric capacity C1 (6), the 4th layer of connection input (1), the first layer of the electric capacity C1 (6), third layer, the
Five layers of connection corresponding with electric capacity C5 (10) first layer, third layer, layer 5；
The second layer of the electric capacity C2 (7), the 4th layer of connection input (1), the first layer of the electric capacity C2 (7), third layer, the
Five layers of connection corresponding with electric capacity C5 (10) first layer, third layer, layer 5；
The second layer of the electric capacity C3 (8), the 4th layer of connection output end (2), the first layer of the electric capacity C3 (8), third layer, the
Five layers of connection corresponding with electric capacity C5 (10) first layer, third layer, layer 5；
The second layer of the electric capacity C4 (9), the 4th layer of connection output end (2), the first layer of the electric capacity C4 (9), third layer, the
Five layers of connection corresponding with electric capacity C5 (10) first layer, third layer, layer 5.
3. Stacked LTCC low pass filters as claimed in claim 2, it is characterised in that the thickness of the metal electrode is
20 μm, ceramic substrate is provided between metal electrode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720030367.7U CN206364161U (en) | 2017-01-11 | 2017-01-11 | A kind of Stacked LTCC low pass filters |
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| CN201720030367.7U CN206364161U (en) | 2017-01-11 | 2017-01-11 | A kind of Stacked LTCC low pass filters |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108155888A (en) * | 2018-01-05 | 2018-06-12 | 北京航天微电科技有限公司 | A kind of LTCC heavy EMI filters for powered electromagnetic to be inhibited to interfere |
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2017
- 2017-01-11 CN CN201720030367.7U patent/CN206364161U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108155888A (en) * | 2018-01-05 | 2018-06-12 | 北京航天微电科技有限公司 | A kind of LTCC heavy EMI filters for powered electromagnetic to be inhibited to interfere |
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