JPH0419019U - - Google Patents
Info
- Publication number
- JPH0419019U JPH0419019U JP5909090U JP5909090U JPH0419019U JP H0419019 U JPH0419019 U JP H0419019U JP 5909090 U JP5909090 U JP 5909090U JP 5909090 U JP5909090 U JP 5909090U JP H0419019 U JPH0419019 U JP H0419019U
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- acoustic wave
- surface acoustic
- fingers
- busbar
- 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.)
- Granted
Links
- 238000010897 surface acoustic wave method Methods 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims 5
- 230000001808 coupling effect Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
Landscapes
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Description
第１図は本考案の弾性表面波フイルタの電極構
造の一実施例を示す平面図、第２図は第１図実施
例の示す変位図、第３図は同様に第１実施例の示
す変位図、第４図は本考案が示すフイルタの特性
図である。
１００……圧電体平板、１２０，１２１……正
規型電極指、１２２……共通電極。
FIG. 1 is a plan view showing one embodiment of the electrode structure of the surface acoustic wave filter of the present invention, FIG. 2 is a displacement diagram of the embodiment shown in FIG. 1, and FIG. 3 is a displacement diagram of the first embodiment. 4 are characteristic diagrams of the filter according to the present invention. 100... Piezoelectric flat plate, 120, 121... Regular electrode fingers, 122... Common electrode.
Claims (1)
共振子を構成し両者の弾性的横結合効果を利用し
て二重モードフイルタとする弾性表面波フイルタ
に於て、前記弾性表面波の電極が、圧電体平板上
に金属膜で形成された平行に配置する２つの正規
型電極指を電気的に直列接続とした上でさらに、
接続された電極指のバスバー導体を一体化して共
通電極とし、前記共通電極の両端に接続してケー
ブルに接地するための第１と第２の接地端子部を
設ける他、前記２つの正規型電極指の電気的に開
放された電極に接続して各々入力、出力端子部を
形成し、さらにまた前記入力と出力側の正規型電
極指のバスバー導体を各々２ヶ所で切断した上で
、両端のバスバー導体を前記第１と第２の接地端
子部に接続するとともに、前記共通電極の電極指
を延長して前記両端のバスバー導体に接続したこ
とを特徴とする弾性表面波フイルタの電極構造。 In a surface acoustic wave filter in which two surface acoustic wave resonators are constructed adjacent to each other on a piezoelectric flat plate and a double mode filter is created by utilizing the elastic lateral coupling effect between the two, the surface acoustic wave resonators are The electrode is made of a metal film on a piezoelectric flat plate and is electrically connected in series with two regular electrode fingers arranged in parallel, and further,
The bus bar conductors of the connected electrode fingers are integrated to form a common electrode, and in addition to providing first and second ground terminal portions for connecting to both ends of the common electrode and grounding the cable, the two regular type electrodes are provided. Connect to the electrically open electrodes of the fingers to form input and output terminals, and then cut the busbar conductors of the normal type electrode fingers on the input and output sides at two places, and then connect the busbar conductors at both ends. An electrode structure for a surface acoustic wave filter, characterized in that a busbar conductor is connected to the first and second ground terminal portions, and electrode fingers of the common electrode are extended and connected to the busbar conductors at both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990059090U JP2539789Y2 (en) | 1990-06-04 | 1990-06-04 | Electrode structure of surface acoustic wave filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990059090U JP2539789Y2 (en) | 1990-06-04 | 1990-06-04 | Electrode structure of surface acoustic wave filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0419019U true JPH0419019U (en) | 1992-02-18 |
| JP2539789Y2 JP2539789Y2 (en) | 1997-06-25 |
Family
ID=31585288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990059090U Expired - Lifetime JP2539789Y2 (en) | 1990-06-04 | 1990-06-04 | Electrode structure of surface acoustic wave filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2539789Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5921114A (en) * | 1982-07-27 | 1984-02-03 | Toyo Commun Equip Co Ltd | Electrode structure of high frequency narrow band multiplex mode filter |
| JPS5921116A (en) * | 1982-07-27 | 1984-02-03 | Toyo Commun Equip Co Ltd | Electrode structure of reflector type high frequency and narrow band multiplex mode filter |
| JPS63211910A (en) * | 1987-02-27 | 1988-09-05 | Toshiba Corp | Surface acoustic wave resonator device |
-
1990
- 1990-06-04 JP JP1990059090U patent/JP2539789Y2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5921114A (en) * | 1982-07-27 | 1984-02-03 | Toyo Commun Equip Co Ltd | Electrode structure of high frequency narrow band multiplex mode filter |
| JPS5921116A (en) * | 1982-07-27 | 1984-02-03 | Toyo Commun Equip Co Ltd | Electrode structure of reflector type high frequency and narrow band multiplex mode filter |
| JPS63211910A (en) * | 1987-02-27 | 1988-09-05 | Toshiba Corp | Surface acoustic wave resonator device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2539789Y2 (en) | 1997-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |