JPS5621407A - Dispersive type delay line - Google Patents
Dispersive type delay lineInfo
- Publication number
- JPS5621407A JPS5621407A JP9796879A JP9796879A JPS5621407A JP S5621407 A JPS5621407 A JP S5621407A JP 9796879 A JP9796879 A JP 9796879A JP 9796879 A JP9796879 A JP 9796879A JP S5621407 A JPS5621407 A JP S5621407A
- Authority
- JP
- Japan
- Prior art keywords
- block
- electrodes
- delay line
- transducer
- blocks
- 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
- 235000014676 Phragmites communis Nutrition 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
- H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
- H03H9/14508—Polyphase SAW transducers
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
PURPOSE:To reduce insertion loss of the elastic surface wave, by giving a characteristic, where a linear chirp waveform is generated, to each block of plural transducer electrodes and by giving phase difference 90 deg. to read screen type electrodes of each block. CONSTITUTION:In respect to transducer electrode 11, the distance between reed screen type electrodes (a) and (b) is set to (n+1/4)lambda for the purpose of obtaining a chirp signal for every block of blocks B1-B4, and the interval of electrode fingers is changed successively for every block of blocks B1-B4 to obtain a unidirectional dispersive delay line. Phase shifter 12 gives phase difference 90 deg. between electrodes (a) and (b) to satisfy the unidirectional condition for every block. The similar constitution is adopted for output-side transducer 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9796879A JPS5621407A (en) | 1979-07-31 | 1979-07-31 | Dispersive type delay line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9796879A JPS5621407A (en) | 1979-07-31 | 1979-07-31 | Dispersive type delay line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5621407A true JPS5621407A (en) | 1981-02-27 |
Family
ID=14206459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9796879A Pending JPS5621407A (en) | 1979-07-31 | 1979-07-31 | Dispersive type delay line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5621407A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0066281A2 (en) * | 1981-05-29 | 1982-12-08 | Siemens Aktiengesellschaft | Dispersive delay line as a pulse compression filter |
| JPS58145212A (en) * | 1982-02-02 | 1983-08-30 | Clarion Co Ltd | Surface acoustic wave device |
| JPH06291585A (en) * | 1991-03-29 | 1994-10-18 | Mitsui Mining & Smelting Co Ltd | Surface acoustic wave element and filter |
-
1979
- 1979-07-31 JP JP9796879A patent/JPS5621407A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0066281A2 (en) * | 1981-05-29 | 1982-12-08 | Siemens Aktiengesellschaft | Dispersive delay line as a pulse compression filter |
| JPS58145212A (en) * | 1982-02-02 | 1983-08-30 | Clarion Co Ltd | Surface acoustic wave device |
| JPH043127B2 (en) * | 1982-02-02 | 1992-01-22 | ||
| JPH06291585A (en) * | 1991-03-29 | 1994-10-18 | Mitsui Mining & Smelting Co Ltd | Surface acoustic wave element and filter |
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