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BB4112 参数 Datasheet PDF下载

BB4112图片预览
型号: BB4112
PDF下载: 下载PDF文件 查看货源
内容描述: [4 Port Circulator, 424MHz Min, 428MHz Max]
分类和应用: 射频微波
文件页数/大小: 58 页 / 1041 K
品牌: TEMEX [ TEMEX ]
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FERRITE DEVICES  
Technical information / Electrical features  
ELECTRICAL FEATURES  
All the parameters given in this section (insertion loss, isolation, VSWR, power) are absolute  
maximum ratings assured in the operating temperature range. Typical values are obviously better.  
In s e rt io n lo s s (I.L.)  
If a signal is applied at port # 1, it will emerge from port # 2 with a loss characteristic called insertion  
loss, which will be the ratio of the output signal to the input signal expressed in dB:  
Pin  
I.L dB = 10 log10  
[
]
Pout  
Typical values: 0.1 to 0.4 dB.  
Is o la t io n  
For an isolator:  
If a signal is applied at port # 2, it will emerge from port # 1 with a high insertion loss called  
isolation, which is also expressed in dB (ratio of the output signal to the input signal).  
For a circulator:  
For a circulator, it should be noted that this parameter is not applicable. But it is common to use  
this parameter as if the circulator could be made into an isolator by terminating one port (e.g. port  
# 3) with a matched load. The isolation measured is dependent on the VSWR of both the  
termination and the circulator port.  
Typical values: -20 to -30 dB  
VS WR  
ρ
The reflection coefficient magnitude  
or circulator (see Fig. 6).  
characterizes the reflective property of each port of an isolator  
Preff  
ρ
=
Pin  
It is useful to use the voltage standing wave ratio (VSWR)  
ρ
1 +  
VSWR =  
ρ
1 –  
Pin  
Pout  
DUT  
~
Typical values: 1.07: 1 to 1.25: 1  
FIG. 6  
Preff  
15-5  
Vol. 1  
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