CN207354234U - A kind of wave filter for carrying impedance matching - Google Patents
A kind of wave filter for carrying impedance matching Download PDFInfo
- Publication number
- CN207354234U CN207354234U CN201721143132.5U CN201721143132U CN207354234U CN 207354234 U CN207354234 U CN 207354234U CN 201721143132 U CN201721143132 U CN 201721143132U CN 207354234 U CN207354234 U CN 207354234U
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- Prior art keywords
- pad
- filter
- impedance matching
- chips
- wave filter
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- 239000000919 ceramic Substances 0.000 claims abstract description 22
- 241000218202 Coptis Species 0.000 claims description 3
- 235000002991 Coptis groenlandica Nutrition 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The utility model provides a kind of wave filter for carrying impedance matching, it can realize the matched demand of filter impedance, improve the integration degree of wave filter, meet miniaturization of the client for PCB, the requirement of simplification, including ceramic shell, cavity is equipped with the ceramic shell, filter chip and IPD chips are equipped with the cavity, the filter chip and the IPD chips are respectively equipped with pad, connected between the pad of the pad of the filter chip and the IPD chips by bonding wire, the ceramic shell is equipped with pad, the pad of the filter chip is connected the pad on the ceramic shell with the pad of the IPD chips by bonding wire respectively.
Description
Technical field
Wave filter technology field is the utility model is related to, is specially a kind of wave filter for carrying impedance matching.
Background technology
Radio circuit field, the front-end circuit especially between antenna to processor, actual design and application all need
Accomplish the matching of impedance, to meet that each device plays optimal performance.Crucial device of the wave filter as RF front-end circuit
Part, the realization of its optimal electrical property also rely on impedance environment.In general each device is designed as 50,75,100 or 200 Europe
The characteristic impedance of nurse, if final products need external matching software to realize these standard feature impedances.SAW or BAW
Wave filter is designed all in accordance with the requirement of characteristic impedance substantially, but due to increasingly sophisticated application requirement, need to balance client
Other indexs, the impedance for causing final products is not the impedance of standard, just needs external matching element to complete impedance at this time
Matching.External matching element generally requires client's headspace on pcb board, is unfavorable for the miniaturization of PCB editions, simplifies.
Utility model content
In view of the above-mentioned problems, the utility model provides a kind of wave filter for carrying impedance matching, it can realize wave filter
The demand of impedance matching, improves the integration degree of wave filter, meets miniaturization of the client for PCB, and simplification is wanted
Ask.
Its technical solution is such：A kind of wave filter for carrying impedance matching, including ceramic shell, it is characterised in that：
Is equipped with cavity in the ceramic shell, the cavity is interior to be equipped with filter chip and IPD chips, the filter chip and described
IPD chips are respectively equipped with pad, are connected between the pad of the filter chip and the pad of the IPD chips by bonding wire,
The ceramic shell is equipped with pad, and the pad of the filter chip and the pad of the IPD chips are connected by bonding wire respectively
Connect the pad on the ceramic shell.
Further, the filter chip includes BAW wave filters and SAW filter.
Further, the IPD chips include inductance, resistance, capacitance.
Further, the bonding wire is gold thread or aluminum steel.
Further, the filter chip and the IPD chips are fixed in the ceramic shell by glue.
Further, the IPD chips include electrostatic discharge protective circuit, frequency selection circuit.
Further, the filter chip is arranged on the left side of the cavity, and the IPD chips are arranged on the cavity
Right side.
Further, the filter chip is BAW chips, and the IPD chips include two inductance, the inductance difference
Equipped with two pads, one of pad of the inductance connects the pad of the BAW chips, the inductance by bonding wire respectively
Another pad the pad of the ceramic shell is connected by bonding wire respectively.
The wave filter for carrying impedance matching of the utility model, it is incited somebody to action by the way that matching element is placed in IPD chips
IPD chip packages can realize the demand of impedance matching in the ceramic shell of wave filter, improve the integrated journey of wave filter
Degree, meets miniaturization of the client for PCB, the requirement of simplification, reinforcing of the IPD chips as performance of filter, Ke Yiqi
To impedance matching, electrostatic protection, high-frequency signal suppression and other effects.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of wave filter for carrying impedance matching of the utility model.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe.
Specific embodiment one：See Fig. 1, a kind of wave filter for carrying impedance matching of the utility model, including ceramic shell
1, ceramic shell 1 is interior to be equipped with cavity 2, and filter chip 3 and IPD chips 4, filter chip 4 and IPD chips are equipped with cavity 2
5 are fixed in ceramic shell 1 by glue, and filter chip 3 is arranged on the left side of cavity 2, and IPD chips 4 are arranged on cavity 3
Right side, filter chip 3 are BAW chips, and IPD chips 4 include two inductance, and inductance is respectively equipped with two pads 5, inductance its
In a pad 5 pads 5 of BAW chips is connected by bonding wire 6 respectively, another pad 5 of inductance connected by bonding wire 6 respectively
The pad 5 of ceramic shell 1, the pad 5 of filter chip 4 connects the pad 5 on ceramic shell 1 by bonding wire 6, in the present embodiment
Middle bonding wire is gold thread.
BAW chip actual tests in the present embodiment show that its input impedance deviates required 50 ohm, return loss
All perform poor with the flatness of passband, therefore use above-mentioned structure to carry out performance optimization, it is achieved thereby that standard feature impedance,
Optimize return loss and the flatness of passband.
Among practical application, the chip in left side can also be SAW chip, and the IPD chips on right side can be with integrated capacitance, electricity
Resistance etc., the matching network of different frequency is realized by varying the size of inductance and capacitance resistance, is also designed to electrostatic protection electricity
The hydrodynamics as filter main body SAW and BAW chip such as road, frequency selection circuit.
More than, it is only the preferable embodiment of the utility model, but the scope of protection of the utility model is not limited to
In this, any people for being familiar with the technology is in the technical scope disclosed by the utility model, the change or replacement that can readily occur in,
It should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with claim
Subject to protection domain.
Claims (8)
1. a kind of wave filter for carrying impedance matching, including ceramic shell, it is characterised in that：Sky is equipped with the ceramic shell
Chamber, the cavity is interior to be equipped with filter chip and IPD chips, and the filter chip and the IPD chips are respectively equipped with pad,
Connected between the pad of the pad of the filter chip and the IPD chips by bonding wire, the ceramic shell is equipped with weldering
Disk, the pad of the filter chip are connected the weldering on the ceramic shell with the pad of the IPD chips by bonding wire respectively
Disk.
A kind of 2. wave filter for carrying impedance matching according to claim 1, it is characterised in that：The filter chip bag
Include BAW wave filters and SAW filter.
A kind of 3. wave filter for carrying impedance matching according to claim 1, it is characterised in that：The IPD chips include
Inductance, resistance, capacitance.
A kind of 4. wave filter for carrying impedance matching according to claim 1, it is characterised in that：The bonding wire for gold thread or
Aluminum steel.
A kind of 5. wave filter for carrying impedance matching according to claim 1, it is characterised in that：The filter chip and
The IPD chips are fixed in the ceramic shell by glue.
A kind of 6. wave filter for carrying impedance matching according to claim 1, it is characterised in that：The IPD chips include
Electrostatic discharge protective circuit, frequency selection circuit.
A kind of 7. wave filter for carrying impedance matching according to claim 1, it is characterised in that：The filter chip is set
Put and be arranged on the right side of the cavity in the left side of the cavity, the IPD chips.
A kind of 8. wave filter for carrying impedance matching according to claim 7, it is characterised in that：The filter chip is
BAW chips, the IPD chips include two inductance, and the inductance is respectively equipped with two pads, one of weldering of the inductance
Disk connects the pad of the BAW chips by bonding wire respectively, described in another pad of the inductance is connected by bonding wire respectively
The pad of ceramic shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721143132.5U CN207354234U (en) | 2017-09-07 | 2017-09-07 | A kind of wave filter for carrying impedance matching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721143132.5U CN207354234U (en) | 2017-09-07 | 2017-09-07 | A kind of wave filter for carrying impedance matching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207354234U true CN207354234U (en) | 2018-05-11 |
Family
ID=62409679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721143132.5U Active CN207354234U (en) | 2017-09-07 | 2017-09-07 | A kind of wave filter for carrying impedance matching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207354234U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109286386A (en) * | 2018-12-03 | 2019-01-29 | 全讯射频科技(无锡)有限公司 | The filter of integrated varistor |
-
2017
- 2017-09-07 CN CN201721143132.5U patent/CN207354234U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109286386A (en) * | 2018-12-03 | 2019-01-29 | 全讯射频科技(无锡)有限公司 | The filter of integrated varistor |
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