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XC0900A-20 参数 Datasheet PDF下载

XC0900A-20图片预览
型号: XC0900A-20
PDF下载: 下载PDF文件 查看货源
内容描述: 20分贝定向耦合器 [20 dB Directional Coupler]
分类和应用:
文件页数/大小: 23 页 / 576 K
品牌: ANAREN [ ANAREN MICROWAVE ]
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Model XC0900A-20  
Rev F  
In terms of S-parameters, ILtherm can be computed as follows:  
2
2
2
2
ILtherm = −10 log10 S11 + S21 + S31 + S41  
(dB)  
(5)  
The thermal resistance and power dissipated within the unit are then used to calculate the average total input power  
of the unit. The average total steady state input power (Pin) therefore is:  
ΔT  
P
dis  
ILtherm  
R
P =  
=
(W )  
in  
ILtherm  
(6)  
⎞ ⎛  
⎟ ⎜  
⎟ ⎜  
⎠ ⎝  
10  
10  
110  
110  
Where the temperature delta is the circuit temperature (Tcirc) minus the mounting interface temperature (Tmnt):  
ΔT = Tcirc Tmnt (oC)  
(7)  
The maximum allowable circuit temperature is defined by the properties of the materials used to construct the unit.  
Multiple material combinations and bonding techniques are used within the Xinger II product family to optimize RF  
performance. Consequently the maximum allowable circuit temperature varies. Please note that the circuit  
temperature is not a function of the Xinger case (top surface) temperature. Therefore, the case temperature cannot  
be used as a boundary condition for power handling calculations.  
Due to the numerous board materials and mounting configurations used in specific customer configurations, it is the  
end users responsibility to ensure that the Xinger II coupler mounting interface temperature is maintained within the  
limits defined on the power derating plots for the required average power handling. Additionally appropriate solder  
composition is required to prevent reflow or fatigue failure at the RF ports. Finally, reliability is improved when the  
mounting interface and RF port temperatures are kept to a minimum.  
The power-derating curve illustrates how changes in the mounting interface temperature result in converse changes  
of the power handling of the coupler.  
USA/Canada:  
Toll Free:  
Europe:  
(315) 432-8909  
(800) 411-6596  
+44 2392-232392  
Available on Tape and  
Reel for Pick and Place  
Manufacturing.