CN110166020A - Filter and duplexer - Google Patents
Filter and duplexer Download PDFInfo
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- CN110166020A CN110166020A CN201910471259.7A CN201910471259A CN110166020A CN 110166020 A CN110166020 A CN 110166020A CN 201910471259 A CN201910471259 A CN 201910471259A CN 110166020 A CN110166020 A CN 110166020A
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- filter
- group
- inductance
- controllable impedance
- resonator
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/34—Networks for connecting several sources or loads working on different frequencies or frequency bands, to a common load or source
- H03H11/344—Duplexers
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- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
It includes: resonator group that the application, which provides a kind of filter and duplexer, the filter, is arranged on wafer；Controllable impedance group, setting in the dielectric layer, and connect resonator group, adjustment point are provided in controllable impedance group, and the inductance value of controllable impedance group is adjusted for the disconnection by changing adjustment point, and filter is made to have corresponding electrical matching degree.The application realizes by adjusting the inductance value of controllable impedance group, so that filter is had corresponding electrical matching degree, to improve the running parameter stability of filter.
Description
Technical field
This application involves technical field of semiconductors, in particular to a kind of filter and duplexer.
Background technique
Duplexer is two-way three end filter.Duplexer include the different bandpass filter of two centre frequencies and
Impedance matching network.
In the different bandpass filter of two centre frequencies, the lower bandpass filter of centre frequency is transmission channel filter
Wave device (Tx), the higher bandpass filter of another centre frequency are receiving channel filter (Rx).Rx filter connects from antenna
The collection of letters number, and the signal of special frequency band is filtered.Tx filter is only to the spy in the signal generated within a communication device
The signal for determining frequency band is filtered, and filtered signal is supplied to antenna.Duplexer is using transmitting signal and receives signal
Frequency difference both signals are filtered, thus realize transmitting signal and receive signal separation.Constitute this high property
The resonator of the acoustic wave filter of energy mainly includes thin film bulk acoustic wave resonator and SAW resonator.
The impedance matching network main function of duplexer is that suitable impedance match is provided for filter, so that duplexer
Steady operation.
The parameter of the impedance matching network of current specific filter generally immobilizes.The filter constituted with body wave resonator
For wave device, its craft precision of body wave resonator is high, under identical technological parameter, the opering characteristic of electric apparatus for the different filters produced
With different, therefore, it is necessary to arrange in pairs or groups different impedance matching networks (such as matching inductance) for filter, make itself and duplex
Device has suitable matching degree.And under existing technique, the parameter of matching inductance be usually it is fixed, can not adaptability adjustment with
The matching degree of filter causes the running parameter stability of filter bad.
Summary of the invention
The embodiment of the present application is designed to provide a kind of filter and duplexer, to realize by adjusting controllable impedance
The inductance value of group makes filter have corresponding working band.
The embodiment of the present application first aspect provides a kind of filter, comprising: resonator group is arranged on wafer；It is adjustable
Inductance group, setting in the dielectric layer, and connect resonator group, adjustment point are provided in controllable impedance group, for being adjusted by changing
The inductance value of the disconnection adjustment controllable impedance group of integral point, makes filter have corresponding electrical matching degree.
Further, controllable impedance group includes at least two inductance, the series connection of at least two inductance and/or parallel connection.
Further, at least two inductance, each inductance is provided with adjustment point.
Further, at least two inductance, the adjustment point of each inductance is drawn in dielectric layer surface.
Further, controllable impedance group includes the conducting route in dielectric layer neutral body complications.
Further, controllable impedance group is formed with the first tie point in dielectric layer surface.
Further, resonator group is formed with the second tie point in dielectric layer surface.
Further, resonator group includes multiple bulk acoustic wave resonators.
Further, adjustment point is laser disconnection point.
The embodiment of the present application second aspect provides a kind of duplexer, comprising: such as the filter of the embodiment of the present application first aspect
Wave device, wherein
First filter, including the first resonator group and the first controllable impedance group；
Second filter, including the second resonator group and the second controllable impedance group, second filter and second filter are folded
Layer setting, and connected inside lamination；
Antenna is separately connected second filter and second filter.
Filter and duplexer provided by the present application, by the way that resonator group and controllable impedance group are integrated in same filtering
In device, controllable impedance group is provided with adjustment point, realizes the inductance value that controllable impedance group is adjusted by the disconnection for changing adjustment point,
Make filter that there is corresponding electrical matching degree.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application will make below to required in the embodiment of the present application
Attached drawing is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is the schematic diagram of the duplexer of one embodiment of the application；
Fig. 2 is the structural schematic diagram of the first filter of one embodiment of the application；
Fig. 3 is the schematic diagram of the section structure of the first filter of one embodiment of the application；
Fig. 4 is the schematic equivalent circuit of the first filter of one embodiment of the application；
Fig. 5 is the schematic equivalent circuit of the first filter of one embodiment of the application.
Appended drawing reference:
10- duplexer, 100a- first filter, 100b- second filter, 200- antenna, 110a- the first resonator group,
110b- the second resonator group, 120a- the first controllable impedance group, 120b- the second controllable impedance group, 130- dielectric layer, 140- are brilliant
Circle, 121- adjust point, and route, the second tie point of 111-, the first tie point of 123- is connected in 122-.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application is described.?
In the description of the present application, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relatively heavy
The property wanted.
Fig. 1 is please referred to, is the schematic diagram of the duplexer 10 of one embodiment of the application, the duplexer 10 of the present embodiment wraps
It includes: first filter 100a, second filter 100b and antenna 200.First filter 100a includes the first resonator group 110a
With the first controllable impedance group 120a.Second filter 100b includes the second resonator group 110b and the second controllable impedance group 120b,
(being the schematic diagram that two panels filter lamination separates in Fig. 1) is arranged with second filter 100b lamination in first filter 100a, and
It is connected inside lamination.
Antenna 200 is separately connected first filter 100a and second filter 100b.The filter of first filter 100a and second
The parameter of wave device 100b is different, and, as transmitting terminal, another is used cooperatively as receiving end with antenna 200 for one of them.Each
The inductance value of the controllable impedance group of filter is adjustable so that different filters have different working bands, make its with
Duplexer 10 has suitable matching degree.
As shown in Fig. 2, its structural schematic diagram for the first filter 100a of one embodiment of the application, comprising: first is humorous
Shake device group 110a, is arranged on wafer 140.First controllable impedance group 120a is arranged in dielectric layer 130 (refering to Fig. 3), and even
It meets the first resonator group 110a, the first resonator group 110a and the first controllable impedance group 120a is integrated in same chips.The
It is provided with adjustment point 121 on one controllable impedance group 120a, adjusts the first controllable impedance for the disconnection by changing adjustment point 121
The inductance value of group 120a makes first filter 100a have corresponding electrical matching degree, avoids first caused by fixed inductance value
The bad problem of the running parameter stability of filter 100a.
As shown in figure 3, its perspective cross section structural schematic diagram for the first filter 100a of one embodiment of the application, first
Controllable impedance group 120a includes at least two inductance, the series connection of at least two inductance and/or parallel connection.First controllable impedance group 120a packet
Include the conducting route 122 in dielectric layer 130 neutral body complications.First controllable impedance group 120a is by inductance L1, inductance L2, inductance L3
It forms with inductance L4, is formed respectively by the conducting route 122 in dielectric layer 130 neutral body complications.
In inductance L1, inductance L2, inductance L3 and inductance L4, each inductance is provided with adjustment point 121.Adjusting point 121 is
Laser disconnection point, for being disconnected adjustment point 121 by laser technology.The adjustment point 121 of each inductance can be led by metal
Line is drawn on 130 surface of dielectric layer, and forms laser disconnection point as adjustment point 121 on 130 surface of dielectric layer.
In first controllable impedance group 120a, according to preset connection relationship by inductance L1, inductance L2, inductance L3 and inductance
After L4 connection, connecting pin can be drawn on 130 surface of dielectric layer, and form the first tie point 123 (refering to Fig. 4).First is humorous
Shake device group 110a, is arranged on wafer 140, for example can form the first resonator group 110a in the one side of wafer 140, in wafer
140 another side forms the first controllable impedance group 120a.The electrode of first resonator group 110a can be drawn by plain conductor
On 130 surface of dielectric layer, and form the second tie point 111.First tie point 123 is connect with the second tie point 111, so that first
Resonator group 110a is connect with the first controllable impedance group 120a.
As shown in figure 4, its schematic equivalent circuit for the first filter 100a of one embodiment of the application, first is adjustable
Inductance L1, inductance L2, inductance L3 in inductance group 120a are connected with inductance L4 equivalent circuit, wherein inductance L1 and inductance L3 are simultaneously
Connection, inductance L2 and inductance L4 are in parallel, and the inductive circuit after parallel connection is connected, and the first tie point is drawn in one end of series connection node
123, the other end ground connection of series connection node.Laser disconnection is set at the both ends of inductance L1, inductance L2, inductance L3 and inductance L4 respectively
Point a, wherein adjustable point can be shared between two adjacent inductance.For example inductance L1 and inductance L2 have shared an adjustment
Point 121.It is formed between first tie point 123 on 130 surface of dielectric layer and the second tie point 111 and is led by metal wire connection
It is logical, and then it connect the first resonator group 110a with the first controllable impedance group 120a.
As shown in figure 5, another schematic equivalent circuit of the first filter 100a for one embodiment of the application, first
Resonator group 110a includes multiple bulk acoustic wave resonators.By taking the first resonator group 110a of ladder pattern distribution as an example, it is assumed that first
Resonator group 110a is made of resonator Y1, resonator Y2, resonator Y3, resonator Y4 resonator Y5.
The one end resonator Y4 is connected to the node of resonator Y1 resonator Y2, and the other end draws second tie point
111.The one end resonator Y5 is connected to the node of resonator Y2 resonator Y3, and the other end draws another the second tie point 111.
First controllable impedance group 120a has two groups, respectively inductance group 1201 and inductance group 1202, the group of inductance group 1201
At identical as the connection relationship of inductance L1 in Fig. 4, inductance L2, inductance L3 and inductance L4, the above-mentioned description to Fig. 4 is please referred to.String
Draw one first tie point 123a, the first tie point 123a and the second tie point drawn through resonator Y5 in one end of interlink point
11a connection.
Inductance group 1202 is made of inductance L5, inductance L6, inductance L7 and inductance L8, wherein and inductance L5 is in parallel with inductance L7,
Inductance L6 and inductance L8 are in parallel, and the inductive circuit after parallel connection is connected, and first tie point is drawn in one end of series connection node
123b, the first tie point 123b are connect with the second tie point 11b drawn through resonator Y4, another termination of series connection node
Ground.
The above is only preferred embodiment of the present application, are not intended to limit this application.It is all in spirit herein and
Within principle, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this application.
Claims (10)
1. a kind of filter characterized by comprising
Resonator group is arranged on wafer；
Controllable impedance group, setting in the dielectric layer, and connect the resonator group, are provided with adjustment in the controllable impedance group
Point adjusts the inductance value of the controllable impedance group for the disconnection by changing the adjustment point, the filter is made to have phase
The electrical matching degree answered.
2. filter according to claim 1, which is characterized in that the controllable impedance group includes at least two inductance, institute
State the series connection of at least two inductance and/or parallel connection.
3. filter according to claim 2, which is characterized in that at least two inductance, each inductance is equal
It is provided with adjustment point.
4. filter according to claim 3, which is characterized in that at least two inductance, each inductance
Adjustment point is drawn in the dielectric layer surface.
5. filter according to claim 1, which is characterized in that it is neutral that the controllable impedance group is included in the dielectric layer
The conducting route of body complications.
6. filter according to claim 1, which is characterized in that the controllable impedance group is formed in the dielectric layer surface
There is the first tie point.
7. filter according to claim 1, which is characterized in that the resonator group is formed in the dielectric layer surface
Second tie point.
8. filter according to claim 1, which is characterized in that the resonator group includes multiple bulk acoustic wave resonators.
9. filter according to claim 1, which is characterized in that the adjustment point is laser disconnection point.
10. a kind of duplexer characterized by comprising two such as filters according to any one of claims 1 to 9,
Wherein,
First filter, including the first resonator group and the first controllable impedance group；
Second filter, including the second resonator group and the second controllable impedance group, the second filter and second filtering
The setting of device lamination, and connected inside lamination；
Antenna is separately connected the second filter and the second filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910471259.7A CN110166020B (en) | 2019-05-31 | 2019-05-31 | Filter and duplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910471259.7A CN110166020B (en) | 2019-05-31 | 2019-05-31 | Filter and duplexer |
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| Publication Number | Publication Date |
|---|---|
| CN110166020A true CN110166020A (en) | 2019-08-23 |
| CN110166020B CN110166020B (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910471259.7A Active CN110166020B (en) | 2019-05-31 | 2019-05-31 | Filter and duplexer |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888095A (en) * | 2014-02-21 | 2014-06-25 | 广东风华高新科技股份有限公司 | Diplexer and multiplexer |
| CN105577200A (en) * | 2014-10-29 | 2016-05-11 | 联发科技（新加坡）私人有限公司 | Integrated circuit, wireless communication unit, and method for antenna matching |
| CN105659380A (en) * | 2013-10-16 | 2016-06-08 | 瑞典爱立信有限公司 | Tunable inductor arrangement, transceiver, method and computer program |
| CN106571788A (en) * | 2016-11-03 | 2017-04-19 | 青岛海信移动通信技术股份有限公司 | Multiband matching circuit, radio frequency circuit, antenna system and mobile terminal |
| US20180358947A1 (en) * | 2017-06-08 | 2018-12-13 | Qorvo Us, Inc. | Filter circuits having acoustic wave resonators in a transversal configuration |
-
2019
- 2019-05-31 CN CN201910471259.7A patent/CN110166020B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105659380A (en) * | 2013-10-16 | 2016-06-08 | 瑞典爱立信有限公司 | Tunable inductor arrangement, transceiver, method and computer program |
| CN103888095A (en) * | 2014-02-21 | 2014-06-25 | 广东风华高新科技股份有限公司 | Diplexer and multiplexer |
| CN105577200A (en) * | 2014-10-29 | 2016-05-11 | 联发科技（新加坡）私人有限公司 | Integrated circuit, wireless communication unit, and method for antenna matching |
| CN106571788A (en) * | 2016-11-03 | 2017-04-19 | 青岛海信移动通信技术股份有限公司 | Multiband matching circuit, radio frequency circuit, antenna system and mobile terminal |
| US20180358947A1 (en) * | 2017-06-08 | 2018-12-13 | Qorvo Us, Inc. | Filter circuits having acoustic wave resonators in a transversal configuration |
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| Publication number | Publication date |
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| CN110166020B (en) | 2020-04-24 |
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