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參數(shù)資料
| 型號： | 3a325 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Surface Mount Balun |
| 中文描述： | 表面貼裝巴倫 |
| 文件頁數(shù)： | 2/3頁 |
| 文件大?。?/td> | 246K |
| 代理商： | 3A325 |
3A325
Data Sheet VER9/22/00
Available on Tape and
Reel For Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
(315) 432-8909
(800) 544-2414
TYPICAL PERFORMANCE: (@ 25
o
C on test board)
Amplitude Balance 3A325
-0.4
-0.2
0.0
0.2
0.4
470
570
670
770
870
Frequency [MHz]
A
Input Return Loss 3A325
-30
-25
-20
-15
-10
-5
0
470
570
770
870
Frequ670
R
Insertion Loss 3A325
-0.4
-0.3
-0.2
-0.1
0.0
470
570
670
770
870
Frequency [MHz]
I
Phase Balance 3A325
175
177
179
181
183
185
470
570
670
770
870
Frequency [MHz]
P
PERFORMANCE DATA:
Due to the fact the output impedances of the balun are 25
to ground, a circuit board was produced to transform the
output impedances back to 50
in order to test the phase
and amplitude balance of the balun (see plots above). The
test fixture is shown below. This wideband transformer has a
Chebychev characteristic response.
The unbalanced port return loss plot was measured at the
input of the aforementioned test board. Unbalanced port
return loss performance can be improved as narrow band
matching is performed at the output of the balun (input of
the transistor).
The insertion loss measurement was taken by connecting
two baluns back to back and a true insertion loss
measurement was collected, the fixture is shown below.
The insertion loss was calculated by taking the
transmission loss
of
the
board
assembly
and
factoring
out
reflected loss and,
since
there
are
two baluns on the
test board, that
result was then halved.
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