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參數資料
| 型號： | TFS201 |
| 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： | 1 FUNCTIONS, 201 MHz, SAW FILTER |
| 文件頁數： | 1/2頁 |
| 文件大小： | 17K |
| 代理商： | TFS201 |
Ltp: tft030
______________________________________________________________________________________________________
VI TELEFILTER
Application Note TFS 201
______________________________________________________________________________________________________
1. General
The filter is symmetrical, i.e. input and output are exchangeable with each other. But the
external coupling coil has to be connected to pin 3 in any case.
The filter can be driven both, balanced and unbalanced. The current specification is valid only
for balanced use.
To get a balanced signal for test measurements with the Network Analyzer we use two
wideband 1:1 transformers at each port:
SMT 4, vendor NEOSID, PN 88 8529 10
The termination impedances are :
1080
|| -3.4 pF
This impedance is equal for the input and the output. It has to be realized at the point were the
filter is mounted. To match this impedance to the impedance of the system a matching circuit
is required.
2. Theoretical matching
50 Ohm Test circuit
7
LB-IN
version 1.0
01.11.00
-
1/2
VI TELEFILTER
Potsdamer Strae 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-52 / 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
2
1
6
4,5,8,9,10
LB-OUT
SAW
C1
L1
C2
L4
L2
L5
L3
3
L1 = L2 =L3 = L4 = 90 nH
C1 = C2 = 0 pF
L5 = 130 nH
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