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滤波器设计理论.ppt

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1/23

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滤波器设计理论
规格说明
Insertion loss
Pass Band
Rejection
Input/Output Return loss(-15dB)
Input/Output impedance(50ohm,75ohm)
滤波器设计理论
规格说明
Insertion loss
Pass Band
Rejection
Input/Output Return loss(-15dB)
Input/Output impedance(50ohm,75ohm)
LPF ( Low Pass Filter)
HPF (High Pass Filter)
BPF (Band Pass Filter)
常见类型
LPF ( Low Pass Filter)
The attenuation of this particular filter is given by the equation:
Adb = 10 log [ 1 + ( W / Wc ) 2n ]
W = the frequency of desired attenuation
Wc = the cutoff frequency ( W3db ) of the filter
n = the number of elements in the filter
HPF (High Pass Filter)
BPF (Band Pass Filter)
50
100
150
200
250
300
Frequency (MHz)
Graph 1
-50
-30
-10
5
DB(|S[2,1]|)
Schematic 1
DB(|S[1,1]|)
Schematic 1
DB(|S[2,2]|)
Schematic 1
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