CN103262411A - Filter component - Google Patents
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- CN103262411A CN103262411A CN2011800617792A CN201180061779A CN103262411A CN 103262411 A CN103262411 A CN 103262411A CN 2011800617792 A CN2011800617792 A CN 2011800617792A CN 201180061779 A CN201180061779 A CN 201180061779A CN 103262411 A CN103262411 A CN 103262411A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6423—Means for obtaining a particular transfer characteristic
- H03H9/6433—Coupled resonator filters
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/46—Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
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- Acoustics & Sound (AREA)
- Filters And Equalizers (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
A filter component (100) comprises a first filter (10) and a second filter (20) which are respectively connected between an input connection (E100) and an output connection (A100) of the filter component. The first and second filters (10, 20) are designed in such a way that the pass-band (D1) of the first filter (10) and the pass-band (D2) of the second filter (20) overlap one another at least regionally. A synthetic diplex network (30, 40) is connected between the input side (E10) of the first filter and the input side (E20) of the second filter (20), and between the output side (A10) of the first filter and the output side (A20) of the second filter (20).
Description
Technical field
The present invention relates to a kind of (surpassing) wideband filtered device, wherein a plurality of frequency filters wiring each other in the housing of filtering device.
Background technology
Filtering characteristic is configured to surface wave (SAW) filter or volume ripple (BAW) filter basically by the filtering device that converts the electrical signal to acoustical signal and realize.Under the surface wave filter situation, on being arranged in, carrier substrates applies the metal structure of voltage.This metal structure is served as input converter.Because the coupling between the metal structure of carrier substrates and input converter, the surface along carrier substrates when being applied to voltage on the metal structure produces sound wave.This sound wave is converted into the signal of telecommunication again at another metal structure place that is arranged on the surface of carrier substrates and serve as output translator.
Maximum bandwidth with the sound wave filter operating is determined by the coupled characteristic of carrier substrates basically.By lithium tantalate, for example LiTaO
3Under the carrier substrates situation that constitutes, the relative bandwidth with respect to the filter intermediate frequency of filter is limited to about 4%.Can realize bigger bandwidth though utilization has the acoustic filter of the substrate that is made of lithium niobate, the edge of this filter has less edge steepness, and wherein said lithium niobate has the coupling factor bigger than lithium tantalate.
Summary of the invention
What expect is a kind of filtering device of explanation, and this filtering device has big bandwidth and additionally also has high edge steepness.
According to an execution mode, filtering device comprise be used to the input wires terminal that applies signal, be used for output signal output wiring terminal, have input side and have first filter of outlet side and have input side and have second filter of outlet side.First and second filters are connected between input wires terminal and the output wiring terminal.First filter has first free transmission range in frequency spectrum and second filter has second free transmission range in frequency spectrum.First and second filters are configured to, and make win free transmission range and second free transmission range local at least overlapping each other.The first diplex network connection is between the input side of the input side of first filter and second filter.The second diplex network connection is between the outlet side of the outlet side of first filter and second filter.
Filtering device has than the obvious bigger bandwidth of the corresponding first and second single filters.The characteristic that provides according to the band of single filter, especially according to bandwidth and the edge steepness of single filter, defined by wiring have low insertion loss (Einf ü ged mpfung), for example the insertion loss of the highest 3dB and have continuous free transmission range (surpassing) broadband and/or the steep especially filter in edge.In free transmission range, filtering device for example has the fluctuation (ripple) less than 2dB.
Other execution mode of the present invention is learnt by dependent claims.
Description of drawings
Following basis illustrates the accompanying drawing of the embodiment of the invention and further sets forth the present invention.Wherein:
Fig. 1 illustrates the execution mode of the filtering device with two filters in the housing that is integrated in filtering device,
Fig. 2 illustrates the execution mode of the filter of filtering device,
Fig. 3 A illustrates the transfer function of the single filter of filtering device,
Fig. 3 B illustrates the transfer function that the result of ripple rate device obtains,
Fig. 4 illustrates the execution mode of back panel wiring of the single filter of filtering device,
Fig. 5 illustrates another execution mode of back panel wiring of the single filter of filtering device,
Fig. 6 A illustrates another execution mode of back panel wiring of the single filter of filtering device,
Fig. 6 B illustrates another execution mode of back panel wiring of the single filter of filtering device,
Fig. 7 A illustrates another execution mode of back panel wiring of the single filter of filtering device,
Fig. 7 B illustrates another execution mode of back panel wiring of the single filter of filtering device,
Fig. 8 A illustrates the execution mode of the diplex network of filtering device,
Fig. 8 B illustrates another execution mode of the diplex network of filtering device,
Fig. 8 C illustrates another execution mode of the diplex network of filtering device,
Fig. 8 D illustrates another execution mode of the diplex network of filtering device,
Fig. 8 E illustrates another execution mode of the diplex network of filtering device,
Fig. 9 A illustrates the diplex network of filtering device and the execution mode of filter,
Fig. 9 B illustrates the diplex network of filtering device and another execution mode of filter,
Figure 10 illustrates the diplex network of filtering device and another execution mode of filter.
Embodiment
Fig. 1 illustrates to have be used to the input wires terminal E100 that applies signal and is used for the execution mode of filtering device 100 of the output wiring terminal A100 of output signal.This filtering device has housing 70, arranges two single filters 10 and 20 in this housing.Described single filter is constructed so that respectively they have filter function as transfer function.Filter function for example can be corresponding to the transfer function of the band pass filter with stopband range and free transmission range.Compare with stopband range, have significantly lower insertion loss at the logical scope median filter of band.In the transition range between free transmission range and stopband range, filter has left margin and edge, the right respectively.
Fig. 2 illustrates the possible execution mode of single filter 10 and 20.In the embodiment of Fig. 2, filter for example may be embodied as DMS(Dual-Mode-Surface Acoustic Wave, dual mode surface acoustic wave) surface wave filter.Under the situation of the example of execution mode shown in Fig. 2, filter 10 has be used to the input wires terminal E10 that applies signal.DMS track (DMS-Spur) has converter structure 1,2 and 3.Input wires terminal E10 is connected with converter structure 3 with converter structure 1.Transducer 1 and 3 is configured to the input converter of DMS track and is connected in addition be used to the binding post place that applies reference potential M.
Output translator 2 is connected between two input converters 1 and 3.This output translator has the output wiring terminal A10 for output signal.Another binding post of output translator is connected with the binding post that is used for applying reference potential.This reference potential for example can be earth potential.
Converter structure 1,2 and 3 is arranged between reflector 4 and 5.Transducer can for example have the metal structure of pectination under the surface wave filter situation, this structural configuration is on carrier substrates 6.This carrier substrates for example can comprise by lithium niobate, lithium tantalate or the quartzy material that constitutes.
Fig. 3 A illustrates the transfer function separately of filter 10 and 20, and it is drawn about frequency F wherein to insert loss IL.Filter 10 for example has the roughly intermediate frequency of 1960MHz.Filter 20 is arranged on the filter 10 and has the intermediate frequency of about 2040MHz.Filter 10 for example can have the characteristic of the transmitting filter that has edge, precipitous the right, and filter 20 for example can have the characteristic of the receiving filter that has precipitous left margin.
The single filter 10 and 20 of filtering device 100 is constructed to, and makes the free transmission range separately of filter overlap each other.Under the execution mode situation shown in Fig. 3 A, the right of filter 10 overlaps each other along the left margin with filter 20.Article two, filter curve be moved mutually into, make that the edge, the right of filter 10 is overlapping with the left margin of filter 20 when the insertion loss of filter 20 drops to less than 10dB.On the contrary, the left margin of filter 20 and filter 10 are overlapping in following scope, on the right of described scope median filter 10 along with respect to the free transmission range of filter 10, especially insert the loss landing with respect to the minimum in the free transmission range of filter 10 and be less than 10dB.Filter 10 preferably has the steeper left margin in edge, the right than this filter.Filter 20 preferably has the right edge steeper than its left margin.
Fig. 3 B illustrates the filter transfer function that the result of filtering device 100 between input wires terminal E100 and output wiring terminal A100 obtains.Show the filter transfer function of control parameter S 21 forms, this control parameter can for example be measured by means of network analyser between input wires terminal E100 and output wiring terminal A100.The filter transfer function that the result obtains has about 8% relative bandwidth with respect to the present roughly intermediate frequency of 2000MHz.Filtering device can be about the impedance of input and output and optimised at input and output about the phase place of two filters 10 and 20.
Be that example is apparent that with Fig. 3 B, compare with the single filter on the same vehicle substrate, by two single filter wiring being realized having the obviously filtering device of bigger bandwidth of the bandwidth that has respectively than two single filters.Simultaneously, the important filtering characteristic as edge steepness and specified temp characteristic remains unchanged.Under this filter design conditions, when the filter construction of single filter 10 and 20 is applied on the carrier substrates that has on the high carrier substrates that is coupled, for example is made of lithium niobate, realize maximum bandwidth.
Fig. 4 illustrates the execution mode of the back panel wiring of filtering device.This filtering device has filter 10 and filter 20. Filter 10 and 20 is configured to, and makes their transfer function show the characteristic change curve of band pass filter respectively.The transfer function of filter, the function of especially controlling parameter S 21 have free transmission range and stopband range, and wherein the insertion loss in the free transmission range is less than the insertion loss in the stopband range.In the transition range between free transmission range and stopband range, two filters have the edge respectively.The transfer function of the transfer function of filter 10 and filter 20 for example can be corresponding to the filter transfer function shown in Fig. 3 A.
In addition, diplex network 30 and 40 can be configured to, and makes filter 20 in the free transmission range D1 of filter 10, for example the frequency place in the free transmission range D1 shown in Fig. 3 A has the characteristic of high ohm.Filter 20 for example can be configured to more increase ohm for the frequency among the stopband range S1 of frequency ratio for filter 10 in the free transmission range 1 of filter 10, among the stopband range S1 shown in for example Fig. 3 A.
The phase change of the signal of diplex network 30 between the input side E10 of the input wires terminal E100 that is constructed to cause filtering device under the situation of execution mode shown in Fig. 4 and filter 10.Diplex network 40 is constructed to cause the phase change of the signal between the output wiring terminal A100 of the outlet side A10 of filter 10 and filtering device.
Utilize shown in Fig. 4 by single filter structure 10 and 20 and the back panel wiring of the filtering device that constitutes of match circuit 30 and 40, can between the input wires terminal E100 of filtering device and output wiring terminal A100, realize having with respect to the obvious filter transfer function of bigger bandwidth of the filter transfer function of single filter 10 and 20.At this, single filter structure 10 and 20 important filtering characteristic, for example edge steepness and specified temp characteristic remain unchanged.When having, filter 10 is in than the free transmission range of filter 20 more during the free transmission range at low frequency place, and almost constant when the right of the left margin of filter 10 and filter 20 links together along the execution mode that arranges in according to Fig. 4 at two single filters.
Fig. 5,6A, 6B, 7A and 7B illustrate the other possibility of filter 10 and 20 the back panel wiring of filtering device 100, utilize these possibilities can realize the bandwidth of obviously mentioning with respect to single filter, wherein the filter characteristic of single filter 10,20 additional features, remain unchanged as edge steepness and specified temp characteristic.
Fig. 5 illustrates another execution mode of the back panel wiring of filtering device 100.Single filter 10 is connected among the input wires terminal E100 and the signal path SP1 between the output wiring terminal A100 of filtering device.Filter 20 is connected among the input wires terminal E100 and the signal path SP2 between the output wiring terminal A100 of filtering device.Two single filters 10 and 20 are therefore in parallel between the input wires terminal of filtering device and output wiring terminal.The input side E10 of filter 10 is connected with the input wires terminal E100 of filtering device via match circuit 30, for example diplex network.The outlet side A10 of filter 10 directly is connected with the output wiring terminal A100 of filtering device.The input side E20 of filter 20 directly is connected with the input wires terminal E100 of filtering device.The outlet side A20 of filter 20 is connected with the output wiring terminal A100 of filtering device via match circuit 40, for example diplex network.
In the embodiment of Fig. 4, diplex network 30 is configured to cause the phase change of the signal between the input side E10 of the input wires terminal E100 of filtering device and filter 10.Diplex network 40 is configured to cause the phase change of the signal between the output wiring terminal A100 of the outlet side A20 of filter 20 and filtering device.
In the execution mode of the filtering device shown in the Figure 4 and 5, single filter 10 and 20 has asymmetric input side respectively and outlet side is (unbalanced/unbalanced; Single-ended/single-ended).In the execution mode shown in Fig. 6 A, it is (unbalanced that filter 10 has asymmetric input side; Single-ended) and symmetrical outlet side (balance). Single filter structure 10 and 20 is connected in parallel in signal path SP1 and SP2 between the input wires terminal E100 and output wiring terminal A100 of filtering device.
The input wires terminal E10 of filter 10 is connected with the input wires terminal E100 of filtering device via match circuit 30, for example diplex filter.The outlet side A10 of filter 10 is connected with the output wiring terminal A100 of filtering device via match circuit 40, for example diplex network.Because the output of symmetry, filter 10 has another outlet side A10 ', and this another outlet side is connected with the output wiring terminal A100 of filtering device via match circuit 50.The input side E20 of filter 20 directly is connected with the input wires terminal E100 of filtering device.The outlet side A20 of filter 20 directly is connected with the output wiring terminal A100 of filtering device equally.
Fig. 6 B illustrates another execution mode of filtering device, wherein with the different output ports of execution mode shown in Fig. 6 A be configured to the symmetry.Therefore filtering device has output wiring terminal A100 and output wiring terminal A100 '.Filter 20 and the execution mode shown in Fig. 6 A differently are configured to asymmetric and in the outlet side symmetry at input side.Therefore filter 20 has outlet side A20 and another outlet side A20 '.The outlet side A10 of filter 10 is connected with output wiring terminal A100 with the outlet side A20 of filter 20. Filter 10,20 other outlet side A10 ', A20 ' are connected with other output wiring terminal A100 '.Diplex network 40 is connected between the outlet side A20 of the outlet side A10 of filter 10 and filter 20.Diplex network 50 is connected between the other outlet side A20 ' of the other outlet side A10 ' of filter 10 and filter 20.
Fig. 7 A illustrates the filter 10 of filtering device 100 and another execution mode of 20 back panel wiring.Different with execution mode shown in Fig. 6 A, the single filter of filter 10 is configured to have symmetrical input side (balance/balance) and symmetrical outlet side (balance/balance).Different with Fig. 6 A, therefore filter 10 has another input side E10 ', and this another input side is connected with the input wires terminal E100 of filtering device via match circuit 60, for example diplex network.
Fig. 7 B illustrates another execution mode of filtering device, wherein utilizes that input wires terminal E100 and another input wires terminal E100 ' are configured to symmetry and utilizes output wiring terminal A100 and another output wiring terminal A100 ' to be configured to symmetry at outlet side at input side with the different filtering devices of execution mode shown in Fig. 7 A.Filter 10 has input side E10 and another input side E10 ' and outlet side A10 and another outlet side A10 '.Similarly, filter 20 has input side E20 and another input side E20 ' and outlet side A20 and another outlet side A20 '.
Under the execution mode situation shown in Fig. 7 A, the 7B, diplex network 30,40,50 and 60 also be constructed to phase place with filter match each other into, make the signal frequency place of filter 20 in the free transmission range of filter 10 have the characteristic of high ohm, and filter 10 is high ohm at the signal frequency place of one side in the free transmission range of filter 20 on the contrary.Filter 10 for example can more be increased ohm for the signal of signal fusing in the stopband range of filter 20 of the frequency in the free transmission range with filter 20.Filter 20 can have the characteristic of more increasing ohm for the signal of signal fusing in the stopband range of filter 10 of the frequency in the free transmission range with filter 10.The diplex network for example also can be configured at this, makes the signal of signal path SP1 in the free transmission range of filter 20 it almost is almost to play unloaded effect zero load and the range of signal of signal path SP2 in the free transmission range of filter 10.
Under the execution mode situation shown in Fig. 4,5,6A, 6B, 7A and the 7B, at least one matching network or diplex network connection are arranged respectively between the input side E20 of input side E10, the E10 ' of filter 10 and filter 20.The match circuit that at least one is other or other diplex network connection are between the outlet side A20 of outlet side A10, A10 ' and filter 20.
In the embodiment of Fig. 6 A and 7A, filter 10 only is constructed to have the filter of asymmetric/symmetrical side (unbalanced/balance) or is constructed to be in input side and outlet side symmetry status (balance/balance).Similarly, filter 20 also may be embodied as a side be asymmetric and opposite side for (unbalanced/balance) of symmetry or input side for symmetry and in (balance/balance) of outlet side for symmetry.Under this execution mode situation, in Fig. 6 A and 7A, be connected before the filter 10 and diplex network afterwards also can be connected to before the filter 20 accordingly and afterwards.
Fig. 8 A, 8B, 8C, 8D and 8E illustrate diplex network 30,40,50 and 60 possible execution mode.Described diplex network is constructed to cause the phase place rotation of signal basically between its input and its output.Under the execution mode situation shown in Fig. 8 A, the diplex network is realized by conductor line P.Fig. 8 B and 8C illustrate the T shape wiring of coil L and capacitor C respectively.Under the execution mode situation shown in Fig. 8 B, two capacitor C series connection and coil L between the input of diplex network and output are connected to reference voltage terminal.Under the execution mode situation shown in Fig. 8 C, two coil L connect between the input of diplex network and output, wherein are connected with the capacitor C with reference voltage terminal between described coil.Fig. 8 D and 8E illustrate the π shape wiring of coil L and capacitor C.Under the execution mode situation shown in Fig. 8 D, capacitor C is connected between the input wires terminal and output wiring terminal of diplex network.Coil L is connected between input wires terminal and reference voltage terminal or between output wiring terminal and reference voltage terminal.Under the execution mode situation shown in Fig. 8 E, coil L is connected between the input wires terminal and output wiring terminal of diplex network.Capacitor C is connected between input wires terminal and reference voltage terminal and another capacitor C is connected between output wiring terminal and reference voltage terminal.Reference voltage for example can be earth potential.
Fig. 9 A illustrates an execution mode, and the match circuit that wherein is configured to the diplex network is configured to the T shape wiring of capacitor C and coil L.The diplex network for example can be connected to the output wiring terminal E10 of filter 10.Matching network can be simplified, and its mode is to arrange than at three discrete components element still less shown in Fig. 9 A.In the execution mode shown in Fig. 9 B, matching network 30 for example only has a capacitor C and a coil L.In another embodiment, described discrete component can partly be integrated in the chip of the filter that is connected the back.Passive discrete component also can be integrated in the housing of filtering device, for example in the low temperature calcination housing (LTCC housing).
Figure 10 illustrates another execution mode, and wherein matching network has discrete element, for example coil L, and it is connected respectively to filtering device before with afterwards.In addition matching network can also have capacitor, and described capacitor for example can be integrated on the acoustics chip of filtering device.
By two single filters being constructed so that filter transfer function overlaps each other and between two filters, being connected with match circuit, especially diplex network at input side or at outlet side in free transmission ranges, can realize having the filtering device of following total transfer function, the bandwidth of this total transfer function ratio single filter separately has obviously bigger bandwidth.On the carrier substrates that is constituted by lithium tantalate, for example can realize obviously the relative bandwidth greater than 4%.Filtering device can be constructed so that described total transfer function has steep especially left margin or steep especially edge, the right.Also can realize having the transfer function at two steep especially edges.
Reference numerals list
10 filters
20 filters
30 match circuits (diplex network)
40 match circuits (diplex network)
50 match circuits (diplex network)
60 match circuits (diplex network)
70 housings
100 filtering devices
E input wires terminal
The A output wiring terminal
The L coil
The C capacitor.
Claims (21)
1. filtering device comprises:
-for the input wires terminal (E100) that applies signal,
-be used for the output wiring terminal (A100) of output signal,
-have first filter (10) of input side (E10) and outlet side (A10),
-have input side (E20) and have second filter (20) of outlet side (A20),
-wherein first and second filters (10,20) are connected between input wires terminal (E100) and the output wiring terminal (A100),
-wherein first filter (10) has first free transmission range (D1) and second filter (20) has second free transmission range (D2) in frequency spectrum in frequency spectrum,
-wherein first and second filters (10,20) are configured to, and make the free transmission range of winning (D1) and second free transmission range (D2) local at least overlapping each other,
-wherein the first diplex network (30) is connected between the input side (E20) of the input side (E10) of first filter and second filter (20),
-wherein the second diplex network (40) is connected between the outlet side (A20) of the outlet side (A10) of first filter and second filter (20).
2. according to the filtering device of claim 1,
-wherein at least one (10) in first and second filters have at least one other outlet side (A10 '),
-wherein the 3rd diplex network (50) is connected between the outlet side (A20) of another (20) in one other outlet side in the described filter (A10 ') and the filter.
3. according to the filtering device of claim 2,
-wherein at least one (10) in first and second filters have at least one other input side (E10 '),
-wherein the 4th diplex network (60) is connected between the input side (E20) of another (20) in one other input side in the filter (E10 ') and the filter.
4. according to the filtering device of claim 1,
-wherein first and second filters (10,20) be configured to symmetry at outlet side and have other outlet side (A10 ', A20 ') respectively,
-wherein the 3rd diplex network (50) is connected between the other outlet side (A10 ') of first filter (10) and the other outlet side of second filter (20) (A20 ').
5. according to the filtering device of claim 4,
-wherein first and second filters (10,20) be configured to symmetry at input side and have other input side (E10, E10 ') respectively,
-wherein the 4th diplex network (60) is connected between the other input side (A10 ') of first filter (10) and the other input side of second filter (20) (A20 ').
6. according to the filtering device of one of claim 1 to 5,
Wherein diplex network (30,40,50,60) is configured to, ohm is more increased than the frequency place in the stopband range of second filter by the frequency place that the filter of winning (10) is configured in second free transmission range (D2), and ohm is more increased than the frequency place in the stopband range of second filter by the frequency place that second filter (20) is configured in first free transmission range (D1).
7. according to the filtering device of one of claim 1 to 6,
Wherein diplex network (30,40,50,60) is configured to, make frequency place in first free transmission range (D1), signal path with the corresponding diplex network at the input side of second filter (20) and second filter and outlet side place has the impedance of high ohm, and the frequency place in second free transmission range (D2), the signal path with the corresponding diplex network at the input side of first filter (10) and first filter and outlet side place has the impedance of high ohm.
8. according to the filtering device of one of claim 1 to 7,
Wherein at least one (30) in the diplex network are constructed to cause the phase change of the signal between the input side (E10) of the input wires terminal (E100) of filtering device and first filter (10).
9. according to the filtering device of one of claim 1 to 8,
Wherein at least one (40) in the diplex network are constructed to cause the phase change of the signal between the outlet side (A20) of the output wiring terminal (A100) of filtering device and second filter (20).
10. according to the filtering device of one of claim 1 to 9,
Wherein diplex network (30,40,50,60) comprises passive component (P, L, C) respectively, especially the π shape wiring of coil (L), capacitor (C) and/or circuit (P) or the wiring of T shape.
11. according to the filtering device of claim 10,
Wherein the element (P, L, C) of diplex network (30,40,50,60) is integrated in first filter (10) and/or second filter (20) at least in part.
12. according to the filtering device of one of claim 10 or 11,
-wherein first and second filters (10,20) have metal structure (1,2,3,4,5) respectively, and described metal structure is arranged on the substrate (6),
-wherein the element (P, L, C) of diplex network (30,40,50,60) is integrated in the substrate at least in part.
13. according to the filtering device of one of claim 10 to 12,
Wherein the element (P, L, C) of diplex network (30,40,50,60) is integrated in the housing (70) of filtering device at least in part, especially in the low temperature calcination housing.
14. according to the filtering device of one of claim 1 to 13,
Wherein first and second filters (10,20) are configured to, and the free transmission range of winning (D1) is in than in the low frequency range of second free transmission range (D2).
15. according to the filtering device of one of claim 1 to 14,
-wherein first filter (10) is constructed so that first free transmission range (D1) has the steeper left margin in edge, the right than first free transmission range,
-wherein second filter (20) is constructed so that second free transmission range (D2) has the right edge steeper than the left margin of second free transmission range.
16. according to the filtering device of one of claim 1 to 15,
Wherein first filter (10) and second filter (20) are configured to acoustic filter respectively, especially are configured to surface wave filter, critical wave filter or volume wave filter.
17. according to the filtering device of one of claim 1 to 16,
Described filtering device has the 3rd passband scope (D3), and the 3rd passband scope extends through first free transmission range (D1) and second free transmission range (D2), and wherein the insertion loss of filtering device in the 3rd passband scope is to fluctuate less than 5dB.
18. according to the filtering device of claim 17,
Wherein the 3rd passband scope (D3) has the relative bandwidth greater than 4%.
19. according to the filtering device of one of claim 17 or 18,
Wherein filtering device locates to have little variation aspect the absolute value of nominal impedance at input wires terminal or output wiring terminal (E100, A100) in the 3rd passband scope (D3).
20. according to the filtering device of one of claim 1 to 19,
Wherein first and second filters (10,20) have the frequency characteristic of band resistance respectively.
21. according to the filtering device of one of claim 1 to 20,
Wherein first filter (10) is tunable optic filter.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010055648.3A DE102010055648B4 (en) | 2010-12-22 | 2010-12-22 | filter device |
| DE102010055648.3 | 2010-12-22 | ||
| PCT/EP2011/071657 WO2012084461A1 (en) | 2010-12-22 | 2011-12-02 | Filter component |
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| Publication Number | Publication Date |
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| CN103262411A true CN103262411A (en) | 2013-08-21 |
| CN103262411B CN103262411B (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201180061779.2A Active CN103262411B (en) | 2010-12-22 | 2011-12-02 | Filter component |
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| CN (1) | CN103262411B (en) |
| DE (1) | DE102010055648B4 (en) |
| WO (1) | WO2012084461A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680821A (en) * | 2015-12-25 | 2016-06-15 | 北京长峰微电科技有限公司 | High-frequency, high-power, narrow-band and low-loss filter |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102576845B1 (en) * | 2015-06-03 | 2023-09-11 | 가부시키가이샤 와이솔재팬 | Acoustic wave device |
| DE102016106185A1 (en) * | 2016-04-05 | 2017-10-05 | Snaptrack, Inc. | Broadband SAW filter |
| DE102018131054B4 (en) * | 2018-12-05 | 2020-10-08 | RF360 Europe GmbH | Micro-acoustic RF filter |
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| EP2175567A1 (en) * | 2007-08-03 | 2010-04-14 | Sharp Kabushiki Kaisha | Communication device |
| CN101841074A (en) * | 2009-03-19 | 2010-09-22 | 富士通株式会社 | Filter, filtering method and communication equipment |
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| CA2069369C (en) | 1992-05-25 | 1995-12-05 | Robert C. Peach | Filterbank using surface acoustic wave technology |
| JP3001350B2 (en) | 1993-05-19 | 2000-01-24 | 日本電気株式会社 | Surface acoustic wave filter |
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2010
- 2010-12-22 DE DE102010055648.3A patent/DE102010055648B4/en active Active
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| EP0744831A2 (en) * | 1995-05-16 | 1996-11-27 | Matsushita Electric Industrial Co., Ltd. | Wireless unit for a time division multiple access system |
| EP1150425A1 (en) * | 1999-10-04 | 2001-10-31 | Kabushiki Kaisha Toshiba | Saw device |
| US20020135267A1 (en) * | 2001-01-10 | 2002-09-26 | Murata Manufacturing Co., Ltd. | Surface acoustic wave device |
| CN1708899A (en) * | 2002-10-25 | 2005-12-14 | 日立金属株式会社 | Balanced-unblanced type multi-band filer module |
| EP2175567A1 (en) * | 2007-08-03 | 2010-04-14 | Sharp Kabushiki Kaisha | Communication device |
| US20090153269A1 (en) * | 2007-12-14 | 2009-06-18 | Fujitsu Media Devices Limited | Acoustic wave filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105680821A (en) * | 2015-12-25 | 2016-06-15 | 北京长峰微电科技有限公司 | High-frequency, high-power, narrow-band and low-loss filter |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012084461A1 (en) | 2012-06-28 |
| DE102010055648B4 (en) | 2018-03-22 |
| CN103262411B (en) | 2017-05-10 |
| DE102010055648A1 (en) | 2012-06-28 |
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