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參數(shù)資料
| 型號(hào)： | 3w525 |
| 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> | 258K |
| 代理商： | 3W525 |
3W525
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 3W525
-0.4
-0.2
0.0
0.2
0.4
1800
1975
2150
2325
2500
Frequency [MHz]
A
Unbalanced Port Return Loss 3W525
-25
-20
-15
-10
-5
0
1800
1975
2150
2325
2500
Frequency [MHz]
B
Insertion Loss 3W525
-0.4
-0.3
-0.2
-0.1
0.0
1800
1975
2150
2325
2500
Frequency [MHz]
I
Phase Balance 3W525
175
177
179
181
183
185
1800
1975
2150
2325
2500
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
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