JPS648710A - Idt exciting type 2-port resonator - Google Patents
Idt exciting type 2-port resonatorInfo
- Publication number
- JPS648710A JPS648710A JP16429987A JP16429987A JPS648710A JP S648710 A JPS648710 A JP S648710A JP 16429987 A JP16429987 A JP 16429987A JP 16429987 A JP16429987 A JP 16429987A JP S648710 A JPS648710 A JP S648710A
- Authority
- JP
- Japan
- Prior art keywords
- idts
- resonator
- idt
- weighting
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE:To obtain a secondary resonator with almost no spurious radiation and resonator filter using the said resonator without increasing insertion loss by constituting input and output IDT electrode capacitors equally so as to apply weighting to an interdigital transducer IDT and connecting them with split in a way of suppressing the second order mode spurious radiation. CONSTITUTION:The IDTs 2, 3 are arranged adjacently on the surface of a piezoelectric substrate 1 of a 2-port SAW resonator, resonators 4, 4' are arranged at both sides of them and COS or COS<2> shape of weighting is applied to the IDTs. The IDTs 2, 3 are split respectively to be IDTs 2', 2'' and 3', 3'' thereby forming new input and output IDTs. In this case, the weighting symmetrical with respect to the center of the IDT is applied to make the electrode capacitance by the IDTs 2', 3' and the electrode capacitance by the IDTs 2'', 3'' equal to each other thereby making the input/output capacitors of the 2-port resonator and the resonator filter employing it equal to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16429987A JPS648710A (en) | 1987-07-01 | 1987-07-01 | Idt exciting type 2-port resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16429987A JPS648710A (en) | 1987-07-01 | 1987-07-01 | Idt exciting type 2-port resonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS648710A true JPS648710A (en) | 1989-01-12 |
Family
ID=15790479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16429987A Pending JPS648710A (en) | 1987-07-01 | 1987-07-01 | Idt exciting type 2-port resonator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS648710A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0449033A (en) * | 1990-06-18 | 1992-02-18 | Tomiyasu Honda | Composite material and preparation thereof |
| WO1992020150A1 (en) * | 1991-04-30 | 1992-11-12 | Siemens Aktiengesellschaft | Twin-gate resonator with reduced side lobes |
| WO2004113396A1 (en) * | 2003-06-25 | 2004-12-29 | Cmet Inc. | Actinic-energy-ray-curable stereolithographic resin composition with improved stability |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58182313A (en) * | 1982-04-19 | 1983-10-25 | Oki Electric Ind Co Ltd | Filter of surface acoustic wave |
| JPS61230418A (en) * | 1985-04-03 | 1986-10-14 | Toyo Commun Equip Co Ltd | Idt excitation type two-port resonator and filter |
-
1987
- 1987-07-01 JP JP16429987A patent/JPS648710A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58182313A (en) * | 1982-04-19 | 1983-10-25 | Oki Electric Ind Co Ltd | Filter of surface acoustic wave |
| JPS61230418A (en) * | 1985-04-03 | 1986-10-14 | Toyo Commun Equip Co Ltd | Idt excitation type two-port resonator and filter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0449033A (en) * | 1990-06-18 | 1992-02-18 | Tomiyasu Honda | Composite material and preparation thereof |
| WO1992020150A1 (en) * | 1991-04-30 | 1992-11-12 | Siemens Aktiengesellschaft | Twin-gate resonator with reduced side lobes |
| WO2004113396A1 (en) * | 2003-06-25 | 2004-12-29 | Cmet Inc. | Actinic-energy-ray-curable stereolithographic resin composition with improved stability |
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