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參數資料
| 型號： | TFS225A |
| 廠商： | VECTRON INTERNATIONAL |
| 元件分類： | 聲表面波濾波器 |
| 英文描述： | VI SAW濾波器(VI SAW Filter) |
| 中文描述： | SAW FILTER |
| 文件頁數： | 3/3頁 |
| 文件大?。?/td> | 21K |
| 代理商： | TFS225A |
Ltp: tft031
______________________________________________________________________________________________________
VI TELEFILTER
Application Note
______________________________________________________________________________________________________
filter will influence the position of the filter only slightly. The height of the peaks is
influenced mainly.
-
Adjust matching at filter input and filter output
Check VSWR for filter input and output.
-
Carry out the matching for the actual source and load impedance in three steps.
Steps one and two are matching of the filter for input or output to source or load
impedance respectively. The result of the matching of the filter input to the actual source
can be checked via the VSWR at the filter output which is still matched to 50 Ohms and
vice versa.
The third step is the matching of the filter input to the actual source and the filter output to
the actual load.
If you match the filter immediately to your source and load impedance without following the
steps before you will probably find a quite good matching for filter amplitude and group delay
performance. But there is no guarantee that VSWR is as specified. This may increase insertion
loss and the stability of filter parameters in production.
version 1.0
29.09.2000
TFS 225 A
3/2
VI TELEFILTER
Potsdamer Strae 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
E-Mail: tft@telefilter.com
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
Vectron International, Inc.
267 Lowell Road
Hudson, NH 03051 / USA
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail: vti@vtinh.com
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