1. An acoustic wave filter, comprising:
a first electroacoustic transducer for surface acoustic waves or for guided bulk acoustic waves having a first metallization ratio \u03b71;
a second electroacoustic transducer having a second metallization ratio \u03b72, wherein the following hold true:
0.2\u2266\u03b71\u22660.8,
0.2\u2266\u03b72\u22660.8 and
\u03b71\u03b72\u22660.8; and
an antenna connection, wherein the first electroacoustic transducer is interconnected between the antenna connection and the second electroacoustic transducer.
2. The acoustic wave filter according to claim 1, wherein the first electroacoustic transducer has N1 fingers and a static capacitance C01, the second electroacoustic transducer has N2 fingers and a static capacitance C02, and wherein the following hold true:
N1>N2 and
0.9*C02\u2266C01\u22661.1*C02.
3. The acoustic wave filter according to claim 1 or 2, wherein the first electroacoustic transducer has an aperture W1 and the second electroacoustic transducer has an aperture W2, and wherein the following holds true: W1>W2.
4. The acoustic wave filter according to claim 1, wherein the acoustic wave filter is a duplexer having a Tx path and an Rx path, and the first electroacoustic transducer and the second electroacoustic transducer are interconnected in series in a signal path, selected from the Tx path or the Rx path.
5. The acoustic wave filter according to claim 4, further comprising:
a BAW resonator,
wherein the first electroacoustic transducer and the second electroacoustic transducer are interconnected in series in the Rx path and the BAW resonator is interconnected in the Tx path.
6. The acoustic wave filter according to claim 4 or 5, wherein a phase shifter is interconnected between the Tx path and the Rx path.
7. The acoustic wave filter according to claim 1, wherein the first electroacoustic transducer and the second electroacoustic transducer have the same static capacitance C0 and the first electroacoustic transducer has more fingers or a smaller aperture than the second electroacoustic transducer.
8. The acoustic wave filter according to claim 1, comprising transducers cascaded in parallel.
9. A method for producing an acoustic wave filter, comprising the following steps:
providing an acoustic wave filter according to claim 1, the acoustic wave filter comprising the first electroacoustic transducer having the first metallization ratio \u03b71 and the second electroacoustic transducer having the second metallization ratio \u03b72;
progressively reducing the ratio \u03b71\u03b72 and determining the nonlinear components up to \u03b71=0.2 and \u03b72=0.8; and
setting the ratio \u03b71\u03b72 which is distinguished by the smallest undesirable frequency components.
10. An acoustic wave filter, comprising:
a first electroacoustic transducer for surface acoustic waves or for guided bulk acoustic waves having a first metallization ratio \u03b71;
a second electroacoustic transducer having a second metallization ratio \u03b72, wherein the following hold true:
0.2\u2266\u03b71\u22660.8,
0.2\u2266\u03b72\u22660.8 and
\u03b71\u03b72\u22660.8,
wherein the acoustic wave filter is a duplexer having a Tx path and an Rx path, and the first electroacoustic transducer and the second electroacoustic transducer are interconnected in series in a signal path, selected from the Tx path or the Rx path; and
a BAW resonator, wherein the first electroacoustic transducer and the second electroacoustic transducer are interconnected in series in the Rx path and the BAW resonator is interconnected in the Tx path.
11. An acoustic wave filter, comprising:
a first electroacoustic transducer for surface acoustic waves or for guided bulk acoustic waves having a first metallization ratio \u03b71; and
a second electroacoustic transducer having a second metallization ratio \u03b72, wherein the following hold true:
0.2\u2266\u03b71\u22660.8,
0.2\u2266\u03b72\u22660.8 and
\u03b71\u03b72\u22660.8,
wherein the acoustic wave filter is a duplexer having a Tx path and an Rx path, and the first electroacoustic transducer and the second electroacoustic transducer are interconnected in series in a signal path, selected from the Tx path or the Rx path, and
wherein a phase shifter is interconnected between the Tx path and the Rx path.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A process for preparing a 2-alkyl-3-aminothiophene derivative represented by the formula (1):
37
wherein, R represents a hydrogen atom, alkyl group or alkoxy group which may be substituted, aromatic or non-aromatic hydrocarbon ring which may be substituted, aromatic or non-aromatic heterocyclic ring which may be substituted, each of R1, R2, R3 and R4 independently represents a hydrogen atom or straight or branched alkyl group having 1 to 12 carbon atoms, and R1 and R2, R3 and R4, R1 and R3, R1 and R4, R2 and R3 or R2 and R4 may together form a cycloalkyl group, comprising reacting a compound represented by the formula (2):
38
wherein, R is as defined above, with a compound represented by the formula (3):
39
wherein, each of R1a, R2a, R3a and R4a independently represents a hydrogen atom, straight or branched alkyl group having 1 to 12 carbon atoms or straight or branched alkenyl group having 1 to 12 carbon atoms, and R1a and R2a, R3a and R4a, R1a and R3a, R1a and R4a, R2 and R3a or R2a and R4a may together form a cycloalkyl group or cycloalkenyl group, in the presence of an acid, and reducing the resulted reaction mixture.
2. The process according to claim 1 wherein R represents a hydrogen atom, alkyl group or alkoxy group which may be substituted or phenyl group which may be substituted.
3. The process according to claim 2 wherein each of R1, R2and R3 represents a hydrogen atom, R4represent an isopropyl group, each of R1a, R2a and R3a represents a hydrogen atom and R4a represent an isopropyl group.
4. The process according to claim 1 wherein R represents a group represented by any of the following (A1) to (A12):
40
wherein, R5 represents a trifluoromethyl group, difluoromethyl group, methyl group, ethyl group or halogen atom, R6 represent a hydrogen atom, methyl group, trifluoromethyl group, halogen atom, methoxy group or amino group, R1 represents a hydrogen atom, halogen atom, methyl group or methoxy group, R8 represents a hydrogen atom, methyl group, ethyl group or halogen atom, and n represents an integer from 0 to 2, and herein, in the case of (A9), (A10) or (A11), R5 is not a halogen atom.
5. The process according to claim 4 wherein R represents (A1), (A2), (A3), (A4) or (A9).
6. The process according to claim 5 wherein R represents (A1), (A2), (A3) or (A4).
7. The process according to claim 6 wherein R represents (A1).
8. The process according to claim 7 wherein R5 represents a trifluoromethyl group and R7 represents a hydrogen atom.
9. The process according to claim 8 wherein each of R1, R2 and R3 represents a hydrogen atom, R4 represent an isopropyl group, each of R1a, R2a and R3a represents a hydrogen atom and R4a represent an isopropyl group.
10. A process for preparing a mixture of 2-alkenyl-3-aminothiophene derivatives containing compounds represented by the formulae (4a), (4b), (4c) and (4d) respectively:
41
wherein, R represents a hydrogen atom, alkyl group or alkoxy group which may be substituted, aromatic or non-aromatic hydrocarbon ring which may be substituted, aromatic or non-aromatic heterocyclic ring which may be substituted, each of R1a, R2a, R3a and R4a independently represents a hydrogen atom, straight or branched alkyl group having 1 to 12 carbon atoms or straight or branched alkenyl group having 1 to 12 carbon atoms, and R1a and R2a R3a and R4a, R1a and R3a, R1a and R4a, R2a and R3a or R2a and R4a may together form a cycloalkyl group or cycloalkenyl group, comprising reacting a compound represented by the formula (2):
42
wherein, R is as defined above, with a compound represented by the formula (3):
43
wherein, R1a to R4a are as define above, in the-presence of an acid.
11. The process according to claim 10 wherein R represents a hydrogen atom, alkyl group or alkoxy group which may be substituted or phenyl group which may be substituted.
12. The process according to claim 11 wherein each of R1a, R2a and R3a represents a hydrogen atom and R4a represent an isopropyl group.
13. The process according to claim 10 where-in R represents a group represented by any of the following (A1) to (A12):
44
wherein, R5represents a trifluoromethyl group, difluoromethyl group, methyl group, ethyl group or halogen atom, R6 represent a hydrogen atom, methyl group, trifluoromethyl group, halogen atom, methoxy group or amino group, R7 represents a hydrogen atom, halogen atom, methyl group or methoxy group, R8 represents a hydrogen atom, methyl group, ethyl group or halogen atom, and n represents an integer from 0 to 2, and herein, in the case of (A9), (A10) or (A11), R5 is not a halogen atom.
14. The process according to claim 13 wherein R represents (A1), (A2), (A3), (A4) or (A9).
15. The process according to claim 14 wherein R represents (A1), (A2), (A3) or (A4).
16. The process according to claim 15 wherein R represents (A1).
17. The process according to claim 16 wherein R5 represents a trifluoromethyl group and R7 represents a hydrogen atom.
18. The processs according to claim 17 wherein each of R1a, R2a and R3a represents a hydrogen atom and R~a represent an isopropyl group.
19. A process for preparing 2-alkyl-3-aminothiophene represented by the formula (la):
45
wherein, Ra represents a group represented by any of the following (A1) to (A12):
46
wherein, R5 represents a trifluoromethyl group, difluoromethyl group, methyl group, ethyl group or halogen atom, R6 represent a hydrogen atom, methyl group, trifluoromethyl group, halogen atom, methoxy group or amino group, R7 represents a hydrogen atom, halogen atom, methyl group or methoxy group, R8 represents a hydrogen atom, methyl group, ethyl group or halogen atom, and n represents an integer from 0 to 2, and herein, in the case of (A9), (A10) or (A11), R5 is not a halogen atom, each of R1, R2, R3 and R4 independently represents a hydrogen atom or straight or branched alkyl group having 1 to 12 carbon atoms, and R1 and R2, R3 and R4, R1 and R3, R1 and R4, R1 and R3 or R2 and R4 may together form a cycloalkyl group, comprising reacting a compound represented by the formula (2):
47
wherein, R represents a hydrogen atom, alkyl group or alkoxy group which may be substituted, aromatic or non-aromatic hydrocarbon ring which may be substituted or aromatic or non-aromatic heterocyclic ring which may be substituted, with a compound represented by the formula (3):
48
wherein, each of R1a, R2a, R3a and R4a independently represents a hydrogen atom, straight or branched alkyl group having 1 to 12 carbon atoms or straight or branched alkenyl group having 1 to 12 carbon atoms, and R1a and R2a, R3a and R4a, R1a and R3a, R1a and R4a, R2a and R3a or R2a and R4a may together form a cycloalkyl group or cycloalkenyl group, in the presence of an acid, reducing the resulted reaction mixture to obtain a compound represented by the formula (1):
49
wherein, R, R1, R2, R3 and R4 are as defined above, further hydrolyzing the resultant compound under acidic or alkaline condition to obtain a compound represented by the formula (5):
50
wherein, R1, R2, R3 and R4 are as defined above, and reacting this compound with a compound represented by the formula (8a):
51
wherein, Ra is as defined above.
20. The process according to claim 19 wherein R represents a hydrogen atom, alkyl group or alkoxy group which may be substituted or phenyl group which may be substituted, Ra represents (A1), (A2), (A3), (A4) or (A9).
21. The process according to claim 20 wherein Ra represents (A1), R5 represents a trifluoromethyl group, R7 represents a hydrogen atom, each of R1, R2 and R3 represents a hydrogen atom, R4 represent an isopropyl group, each of R1a, R2a and R3a represents a hydrogen atom and R4a represent an isopropyl group.
22. A 3-aminothiophene derivative represented by the formula (6a):
52
wherein, R9 represents a hydrogen atom, carboxyl group or alkoxycarbonyl group having 1 to 6 carbon atoms and Ra represents a group represented by any of the following (A1) to (A12):
53
wherein, R5 represents a trifluoromethyl group, difluoromethyl group, methyl group, ethyl group or halogen atom, R6 represent a hydrogen atom, methyl group, trifluoromethyl group, halogen atom, methoxy group-or amino group, R7 represents a hydrogen atom, halogen atom, methyl group or methoxy group, R8 represents a hydrogen atom, methyl group, ethyl group or halogen atom, and n represents an integer from 0 to 2, and herein, in the case of (A9) , (A10) or (A11), R5 is not a halogen atom.
23. The 3-aminothiophene derivative according to claim 22 wherein Ra represents (A1), (A2), (A3), (A4) or (A9).
24. The 3-aminothiophene derivative according to claim 23 wherein Ra represents (A1), (A2), (A3) or (A4).
25. The 3-aminothiophene derivative according to claim 24 wherein Ra represents (A1).
26. The 3-aminothiophene derivative according to claim 25 wherein R5 represents a trifluoromethyl group and R7 represents a hydrogen atom.
27. A mixture of 2-alkenyl-3-aminothiophene derivatives containing compounds represented by the formulae (4a), (4b), (4c) and (4d) respectively:
54
wherein, Rb represents a hydrogen atom, alkyl group or alkoxy group which may be substituted, aromatic or non-aromatic hydrocarbon ring which may be substituted or aromatic or non-aromatic heterocyclic ring which may be substituted, and each of R1a, R2a, R3a and R4a independently represents a hydrogen atom, straight or branched alkyl group having 1 to 12 carbon 5 atoms or straight or branched alkenyl group having 1 to 12 carbon atoms, and R1a and R2a, R3a and R4a, R1a and R3a, R1a and R4a R2a and R3a or R2a and R4a may together form a cycloalkyl group or cycloalkenyl group, excepting the case in which Rb represents a group represented by any of the following (A1) to (A12):
55
wherein, R5represents a trifluoromethyl group, difluoromethyl group, methyl group, ethyl group or halogen atom, R6 represent a hydrogen atom, methyl group, trifluoromethyl group, halogen atom, methoxy group or amino group, R7 represents a hydrogen atom, halogen atom, methyl group or methoxy group, R8 represents a hydrogen atom, methyl group, ethyl group or halogen atom, and n represents an integer from 0 to 2, and herein, in the case of (A9), (A10) or (A11), R5 is not a halogen atom, and the case in which Rb represents a tert-butoxy group and R1a, R2a, R3a and R4a all represent a hydrogen atom being excluded.
28. The mixture according to claim 27 wherein Rb represents a hydrogen atom, alkyl group or alkoxy group which may be substituted or phenyl group which may be substituted.
29. The mixture according to claim 28 wherein each of R1a, R2a and R3a represents a hydrogen atom and R4a represent an isopropyl group.
30. A 2-alkyl-3-aminothiophene derivative represented by the formula (1b):
56
wherein, Rb represents a hydrogen atom, alkyl group or alkoxy group which may be substituted, aromatic or non-aromatic hydrocarbon ring which may be substituted or aromatic or non-aromatic heterocyclic ring which may be substituted, and each of R1, R2, R3 and R4 independently represents a hydrogen atom or straight or branched alkyl group having 1 to 12 carbon atoms, and R1 and R2, R3 and R4, R1 and R3, R1 and R, R2 and R3 or R2 and R4 may together form a cycloalkyl group, excepting the case in which Rb represents a group represented by any of the following (A1) to (A12):
57
wherein, R5 represents a trifluoromethyl group, difluoromethyl group, methyl group, ethyl group or halogen atom, R1 represent a hydrogen atom, methyl group, trifluoromethyl group, halogen atom, methoxy group or amino group, R7 represents a hydrogen atom, halogen atom, methyl group or methoxy group, R8represents a hydrogen atom, methyl group, ethyl group or halogen atom, and n represents an integer from 0 to 2, and herein, in the case of (A9), (A10) or (A11), R5 is not a halogen atom.
31. The 2-alkenyl-3-aminothiophene derivative according to claim 30 wherein Rb represents a hydrogen atom, alkyl group or alkoxy group which may be substituted or phenyl group which may be substituted.
32. The mixture according to claim 31 wherein each of R1, R2 and R3 represents a hydrogen atom and R4 represent an isopropyl group.